Sample records for base-metal sulfides bms
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NASA Astrophysics Data System (ADS)
Bragagni, A.; Luguet, A.; Fonseca, R. O. C.; Pearson, D. G.; Lorand, J.-P.; Nowell, G. M.; Kjarsgaard, B. A.
2017-11-01
We report detailed petrographic investigations along with 187Os/188Os data in Base Metal Sulfide (BMS) on four cratonic mantle xenoliths from Somerset Island (Rae Craton, Canada). The results shed light on the processes affecting the Re-Os systematics and provide time constraints on the formation and evolution of the cratonic lithospheric mantle beneath the Rae craton. When devoid of alteration, BMS grains mainly consist of pentlandite + pyrrhotite ± chalcopyrite. The relatively high BMS modal abundance of the four investigated xenoliths cannot be reconciled with the residual nature of these peridotites, but requires addition of metasomatic BMS. This is especially evident in the two peridotites with the highest bulk Pd/Ir and Pd/Pt. Metasomatic BMS likely formed during melt/fluid percolation in the Sub Continental Lithospheric Mantle (SCLM) as well as during infiltration of the host kimberlite magma, when djerfisherite crystallized around older Fe-Ni-sulfides. On the whole-rock scale, kimberlite metasomatism is visible in a subset of bulk xenoliths, which defines a Re-Os errorchron that dates the host magma emplacement. The 187Os/188Os measured in the twenty analysed BMS grains vary from 0.1084 to >0.17 and it shows no systematic variation depending on the sulfide mineralogical assemblage. The largest range in 187Os/188Os is observed in BMS grains from the two xenoliths with the highest Pd/Ir, Pd/Pt, and sulfide modal abundance. The whole-rock TRD ages of these two samples underestimate the melting age obtained from BMS, demonstrating that bulk Re-Os model ages from peridotites with clear evidence of metasomatism should be treated with caution. The TRD ages determined in BMS grains are clustered around 2.8-2.7, ∼2.2 and ∼1.9 Ga. The 2.8-2.7 Ga TRD ages document the main SCLM building event in the Rae craton, which is likely related to the formation of the local greenstone belts in a continental rift setting. The Paleoproterozoic TRD ages can be explained by
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Nanostructured metal sulfides for energy storage
NASA Astrophysics Data System (ADS)
Rui, Xianhong; Tan, Huiteng; Yan, Qingyu
2014-08-01
Advanced electrodes with a high energy density at high power are urgently needed for high-performance energy storage devices, including lithium-ion batteries (LIBs) and supercapacitors (SCs), to fulfil the requirements of future electrochemical power sources for applications such as in hybrid electric/plug-in-hybrid (HEV/PHEV) vehicles. Metal sulfides with unique physical and chemical properties, as well as high specific capacity/capacitance, which are typically multiple times higher than that of the carbon/graphite-based materials, are currently studied as promising electrode materials. However, the implementation of these sulfide electrodes in practical applications is hindered by their inferior rate performance and cycling stability. Nanostructures offering the advantages of high surface-to-volume ratios, favourable transport properties, and high freedom for the volume change upon ion insertion/extraction and other reactions, present an opportunity to build next-generation LIBs and SCs. Thus, the development of novel concepts in material research to achieve new nanostructures paves the way for improved electrochemical performance. Herein, we summarize recent advances in nanostructured metal sulfides, such as iron sulfides, copper sulfides, cobalt sulfides, nickel sulfides, manganese sulfides, molybdenum sulfides, tin sulfides, with zero-, one-, two-, and three-dimensional morphologies for LIB and SC applications. In addition, the recently emerged concept of incorporating conductive matrices, especially graphene, with metal sulfide nanomaterials will also be highlighted. Finally, some remarks are made on the challenges and perspectives for the future development of metal sulfide-based LIB and SC devices.
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Metal sulfide initiators for metal oxide sorbent regeneration
Turk, Brian S.; Gupta, Raghubir P.
2001-01-01
A process of regenerating a sulfided sorbent is provided. According to the process of the invention, a substantial portion of the energy necessary to initiate the regeneration reaction is provided by the combustion of a particulate metal sulfide additive. In using the particulate metal sulfide additive, the oxygen-containing gas used to regenerate the sulfided sorbent can be fed to the regeneration zone without heating or at a lower temperature than used in conventional processes wherein the regeneration reaction is initiated only by heating the oxygen-containing gas. The particulate metal sulfide additive is preferably an inexpensive mineral ore such as iron pyrite which does not adversely affect the regeneration or corresponding desulfurization reactions. The invention further includes a sorbent composition comprising the particulate metal sulfide additive in admixture with an active metal oxide sorbent capable of removing one or more sulfur compounds from a sulfur-containing gas stream.
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Metal sulfide initiators for metal oxide sorbent regeneration
Turk, Brian S.; Gupta, Raghubir P.
1999-01-01
A process of regenerating a sulfided sorbent is provided. According to the process of the invention, a substantial portion of the energy necessary to initiate the regeneration reaction is provided by the combustion of a particulate metal sulfide additive. In using the particulate metal sulfide additive, the oxygen-containing gas used to regenerate the sulfided sorbent can be fed to the regeneration zone without heating or at a lower temperature than used in conventional processes wherein the regeneration reaction is initiated only by heating the oxygen-containing. The particulate metal sulfide additive is preferably an inexpensive mineral ore such as iron pyrite which does not adversely affect the regeneration or corresponding desulfurization reactions. The invention further includes a sorbent composition comprising the particulate metal sulfide additive in admixture with an active metal oxide sorbent capable of removing one or more sulfur compounds from a sulfur-containing gas stream.
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Metal sulfide initiators for metal oxide sorbent regeneration
Turk, B.S.; Gupta, R.P.
1999-06-22
A process of regenerating a sulfided sorbent is provided. According to the process of the invention, a substantial portion of the energy necessary to initiate the regeneration reaction is provided by the combustion of a particulate metal sulfide additive. In using the particulate metal sulfide additive, the oxygen-containing gas used to regenerate the sulfided sorbent can be fed to the regeneration zone without heating or at a lower temperature than used in conventional processes wherein the regeneration reaction is initiated only by heating the oxygen-containing gas. The particulate metal sulfide additive is preferably an inexpensive mineral ore such as iron pyrite which does not adversely affect the regeneration or corresponding desulfurization reactions. The invention further includes a sorbent composition comprising the particulate metal sulfide additive in admixture with an active metal oxide sorbent capable of removing one or more sulfur compounds from a sulfur-containing gas stream. 1 fig.
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Synthetic Fabrication of Nanoscale MoS2-Based Transition Metal Sulfides
Wang, Shutao; An, Changhua; Yuan, Jikang
2010-01-01
Transition metal sulfides are scientifically and technologically important materials. This review summarizes recent progress on the synthetic fabrication of transition metal sulfides nanocrystals with controlled shape, size, and surface functionality. Special attention is paid to the case of MoS2 nanoparticles, where organic (surfactant, polymer), inorganic (support, promoter, doping) compounds and intercalation chemistry are applied.
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Method for inhibiting oxidation of metal sulfide-containing material
Elsetinow, Alicia; Borda, Michael J.; Schoonen, Martin A.; Strongin, Daniel R.
2006-12-26
The present invention provides means for inhibiting the oxidation of a metal sulfide-containing material, such as ore mine waste rock or metal sulfide taiulings, by coating the metal sulfide-containing material with an oxidation-inhibiting two-tail lipid coating (12) thereon, thereby inhibiting oxidation of the metal sulfide-containing material in acid mine drainage conditions. The lipids may be selected from phospholipids, sphingolipids, glycolipids and combinations thereof.
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Transition metal sulfide loaded catalyst
Maroni, Victor A.; Iton, Lennox E.; Pasterczyk, James W.; Winterer, Markus; Krause, Theodore R.
1994-01-01
A zeolite based catalyst for activation and conversion of methane. A zeolite support includes a transition metal (Mo, Cr or W) sulfide disposed within the micropores of the zeolite. The catalyst allows activation and conversion of methane to C.sub.2 + hydrocarbons in a reducing atmosphere, thereby avoiding formation of oxides of carbon.
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Transition metal sulfide loaded catalyst
Maroni, V.A.; Iton, L.E.; Pasterczyk, J.W.; Winterer, M.; Krause, T.R.
1994-04-26
A zeolite-based catalyst is described for activation and conversion of methane. A zeolite support includes a transition metal (Mo, Cr or W) sulfide disposed within the micropores of the zeolite. The catalyst allows activation and conversion of methane to C[sub 2]+ hydrocarbons in a reducing atmosphere, thereby avoiding formation of oxides of carbon.
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Removal of insoluble heavy metal sulfides from water.
Banfalvi, Gaspar
2006-05-01
The necessity of heavy metal removal from wastewater has led to increasing interest in absorbents. We have developed a new approach to obtain high metal adsorption capacity by precipitating metal sulfides with sodium sulfide on the surface of bentonite and adhere them to the absorbent. This method allowed to remove approximately 90% of cadmium as CdS from 10(-4)-10(-6) M CdCl2 solutions. Additional reactions are related to the removal of excess sodium sulfide by the release of hydrogen sulfide and oxidation to sulfur using carbogen gas (5% CO2, 95% O2) followed by aeration.
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Metal Sulfides as Sensing Materials for Chemoresistive Gas Sensors
Gaiardo, Andrea; Fabbri, Barbara; Guidi, Vincenzo; Bellutti, Pierluigi; Giberti, Alessio; Gherardi, Sandro; Vanzetti, Lia; Malagù, Cesare; Zonta, Giulia
2016-01-01
This work aims at a broad overview of the results obtained with metal-sulfide materials in the field of chemoresistive gas sensing. Indeed, despite the well-known electrical, optical, structural and morphological features previously described in the literature, metal sulfides present lack of investigation for gas sensing applications, a field in which the metal oxides still maintain a leading role owing to their high sensitivity, low cost, small dimensions and simple integration, in spite of the wide assortment of sensing materials. However, despite their great advantages, metal oxides have shown significant drawbacks, which have led to the search for new materials for gas sensing devices. In this work, Cadmium Sulfide and Tin (IV) Sulfide were investigated as functional materials for thick-film chemoresistive gas-sensors fabrication and they were tested both in thermo- and in photo-activation modes. Furthermore, electrical characterization was carried out in order to verify their gas sensing properties and material stability, by comparing the results obtained with metal sulfides to those obtained by using their metal-oxides counterparts. The results highlighted the possibility to use metal sulfides as a novel class of sensing materials, owing to their selectivity to specific compounds, stability, and the possibility to operate at room temperature. PMID:26927120
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Nanostructured Metal Oxides and Sulfides for Lithium-Sulfur Batteries.
Liu, Xue; Huang, Jia-Qi; Zhang, Qiang; Mai, Liqiang
2017-05-01
Lithium-sulfur (Li-S) batteries with high energy density and long cycle life are considered to be one of the most promising next-generation energy-storage systems beyond routine lithium-ion batteries. Various approaches have been proposed to break down technical barriers in Li-S battery systems. The use of nanostructured metal oxides and sulfides for high sulfur utilization and long life span of Li-S batteries is reviewed here. The relationships between the intrinsic properties of metal oxide/sulfide hosts and electrochemical performances of Li-S batteries are discussed. Nanostructured metal oxides/sulfides hosts used in solid sulfur cathodes, separators/interlayers, lithium-metal-anode protection, and lithium polysulfides batteries are discussed respectively. Prospects for the future developments of Li-S batteries with nanostructured metal oxides/sulfides are also discussed. © 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
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Surface Charge Development on Transition Metal Sulfides: An Electrokinetic Study
NASA Astrophysics Data System (ADS)
Bebie, Joakim; Schoonen, Martin A. A.; Fuhrmann, Mark; Strongin, Daniel R.
1998-02-01
The isoelectric points, pH i.e.p., of ZnS, PbS, CuFeS 2, FeS, FeS 2, NiS 2, CoS 2, and MnS 2 in NaCl supported electrolyte solutions are estimated to be between pH 3.3 and 0.6, with most of the isoelectric points below pH 2. The first electrokinetic measurements on NiS 2, CoS 2, and MnS 2 are reported here. Below pH i.e.p. the metal-sulfide surfaces are positively charged, above pH i.e.p. the surfaces are negatively charged. The addition of Me 2+ ions shifts the pH i.e.p. and changes the pH dependence considerably. The isoelectric points of the measured transition metal sulfides in the absence of metal ions or dissolved sulfide (H 2S or HS -) are in agreement with those found in earlier studies. The pH range of observed isoelectric points for metal sulfides (0.6-3.3) is compared to the considerably wider pH i.e.p. range (2-12) found for oxides. The correlation between pH i.e.p. and the electronegativities of the metal sulfides suggests that all metal sulfides will have an isoelectric point between pH 0.6 and 3.3. Compared to metal oxides, sulfides exhibit an isoelectric point that is largely independent of the nature of the metal cation in the solid.
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Formation of selenide, sulfide or mixed selenide-sulfide films on metal or metal coated substrates
Eser, Erten; Fields, Shannon
2012-05-01
A process and composition for preventing cracking in composite structures comprising a metal coated substrate and a selenide, sulfide or mixed selenide sulfide film. Specifically, cracking is prevented in the coating of molybdenum coated substrates upon which a copper, indium-gallium diselenide (CIGS) film is deposited. Cracking is inhibited by adding a Se passivating amount of oxygen to the Mo and limiting the amount of Se deposited on the Mo coating.
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Vesicle-metal-sulfide assemblages from the Chelyabinsk meteorite
NASA Astrophysics Data System (ADS)
Andronikov, A.; Lauretta, D.; Hill, D.; Andronikova, I.
2014-07-01
On February 15, 2013, an ET object entered the Earth's atmosphere over the Russian city of Chelyabinsk. It entered at a preatmospheric velocity of 18.6 km/sec at the angle of 17--20°. The bolide responsible for this event was estimated to be 17-20 m in diameter and had a mass of ˜10 Ktons; the ensuing airburst occurred at an altitude >20 km and released a total energy of ˜440 kT [1,2]. The Chelyabinsk meteorite is an equilibrated LL5 ordinary chondrite, shock stage S4, and weathering grade WG0 similar to other LL5 falls [1,2]. Our studied sample is an impact melt breccia consisting of shock-darkened chondrite clasts (SDC) and vesicular impact melt lithology (IML). The SDC have recrystallized textures and contain barred- and porphyritic-olivine, porphyritic-olivine-pyroxene and radial-pyroxene chondrules in the intrachondrule matrix. A dense network of thin fractures in the SDC is filled up with opaque minerals [cf. 3]. Metals in the SDC are kamacite (4.7--8.5 % Ni), taenite (21.4--33.5 % Ni), and martensite (14.5--18.6 % Ni). The IML consists mostly of tiny (<10 microns) silicate grains surrounded by patches of glass. The IML is characterized by the presence of multiple vesicles (up to 1 mm) in silicate matrix. The vesicles are often filled up with sulfide-metal assemblages or only with sulfide. Metals in the IML are martensite (12.9--18.4 % Ni) and taenite (19.3--47.3 % Ni). Sulfides from both SDC and IML are Ni-bearing troilite (62.2--64.2 % Fe; 35.2--37.2 % S; 3000--5000 ppm Ni), with rare pentlandite (41.2--48.6 % Fe, 33.2--34.3 % S, 19.4--23.9 % Ni). The presence of abundant vesicles in the IML indicates strong heating and volatilization. Since no other phase except for sulfide-metal assemblages were observed to fill up vesicles, the likely source of volatiles is S vapor formed by vaporization of FeS during impact melting [cf. 4]. Molten metal and sulfide coalesced into droplets of metal-sulfide liquids forming eventually sulfide-metal assemblages. A
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Atomic layer deposition of metal sulfide materials
Dasgupta, Neil P.; Meng, Xiangbo; Elam, Jeffrey W.; ...
2015-01-12
The field of nanoscience is delivering increasingly intricate yet elegant geometric structures incorporating an ever-expanding palette of materials. Atomic layer deposition (ALD) is a powerful driver of this field, providing exceptionally conformal coatings spanning the periodic table and atomic-scale precision independent of substrate geometry. This versatility is intrinsic to ALD and results from sequential and self-limiting surface reactions. This characteristic facilitates digital synthesis, in which the film grows linearly with the number of reaction cycles. While the majority of ALD processes identified to date produce metal oxides, novel applications in areas such as energy storage, catalysis, and nanophotonics are motivatingmore » interest in sulfide materials. Recent progress in ALD of sulfides has expanded the diversity of accessible materials as well as a more complete understanding of the unique chalcogenide surface chemistry. ALD of sulfide materials typically uses metalorganic precursors and hydrogen sulfide (H 2S). As in oxide ALD, the precursor chemistry is critical to controlling both the film growth and properties including roughness, crystallinity, and impurity levels. By modification of the precursor sequence, multicomponent sulfides have been deposited, although challenges remain because of the higher propensity for cation exchange reactions, greater diffusion rates, and unintentional annealing of this more labile class of materials. A deeper understanding of these surface chemical reactions has been achieved through a combination of in situ studies and quantum-chemical calculations. As this understanding matures, so does our ability to deterministically tailor film properties to new applications and more sophisticated devices. This Account highlights the attributes of ALD chemistry that are unique to metal sulfides and surveys recent applications of these materials in photovoltaics, energy storage, and photonics. Within each application
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Metal sulfide electrodes and energy storage devices thereof
Chiang, Yet-Ming; Woodford, William Henry; Li, Zheng; Carter, W. Craig
2017-02-28
The present invention generally relates to energy storage devices, and to metal sulfide energy storage devices in particular. Some aspects of the invention relate to energy storage devices comprising at least one flowable electrode, wherein the flowable electrode comprises an electroactive metal sulfide material suspended and/or dissolved in a carrier fluid. In some embodiments, the flowable electrode further comprises a plurality of electronically conductive particles suspended and/or dissolved in the carrier fluid, wherein the electronically conductive particles form a percolating conductive network. An energy storage device comprising a flowable electrode comprising a metal sulfide electroactive material and a percolating conductive network may advantageously exhibit, upon reversible cycling, higher energy densities and specific capacities than conventional energy storage devices.
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Atomic layer deposition of metal sulfide thin films using non-halogenated precursors
Martinson, Alex B. F.; Elam, Jeffrey W.; Pellin, Michael J.
2015-05-26
A method for preparing a metal sulfide thin film using ALD and structures incorporating the metal sulfide thin film. The method includes providing an ALD reactor, a substrate, a first precursor comprising a metal and a second precursor comprising a sulfur compound. The first and the second precursors are reacted in the ALD precursor to form a metal sulfide thin film on the substrate. In a particular embodiment, the metal compound comprises Bis(N,N'-di-sec-butylacetamidinato)dicopper(I) and the sulfur compound comprises hydrogen sulfide (H.sub.2S) to prepare a Cu.sub.2S film. The resulting metal sulfide thin film may be used in among other devices, photovoltaic devices, including interdigitated photovoltaic devices that may use relatively abundant materials for electrical energy production.
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Code of Federal Regulations, 2010 CFR
2010-04-01
... ADMINISTRATION, DEPARTMENT OF TRANSPORTATION TRANSPORTATION INFRASTRUCTURE MANAGEMENT MANAGEMENT AND MONITORING SYSTEMS Management Systems § 500.107 BMS. An effective BMS for bridges on and off Federal-aid highways that should be based on the “AASHTO Guidelines for Bridge Management Systems” 2 and that supplies...
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Volcanic sulfur degassing and the role of sulfides in controlling volcanic metal emissions
NASA Astrophysics Data System (ADS)
Edmonds, M.; Liu, E.
2017-12-01
Volcanoes emit prodigious quantities of sulfur and metals, their behaviour inextricably linked through pre-eruptive sulfide systematics and through degassing and speciation in the volcanic plume. Fundamental differences exist in the metal output of ocean island versus arc volcanoes, with volcanoes in Hawaii and Iceland outgassing large fluxes of gaseous and particulate chalcophiles; and arc volcanoes' plumes, in contrast, enriched in Zn, Cu, Tl and Pb. Metals and metalloids partition into a magmatic vapor phase from silicate melt at crustal pressures. Their abundance in magmatic vapor is influenced strongly by sulfide saturation and by the composition of the magmatic vapor phase, particularly with respect to chloride. These factors are highly dependent on tectonic setting. Metal outgassing is controlled by magma water content and redox: deep saturation in vapor and minimal sulfide in arc basalts yields metal-rich vapor; shallow degassing and resorption of sulfides feeds the metal content of volcanic gas in ocean islands. We present a detailed study of the sulfide systematics of the products of the 2014-2015 Holuhraun basaltic fissure eruption (Bárðarbunga volcanic system, Iceland) to illustrate the interplay between late water and sulfur outgassing; sulfide saturation and breakdown; and metal partitioning into a vapor phase. Sulfide globules, representing quenched droplets of an immiscible sulfide liquid, are preserved within erupted tephra. Sulfide globules in rapidly quenched tephra are preserved within both matrix glass and as inclusions in crystals. The stereologically-corrected 3D size distribution of sulfide globules ranges from <1 µm to 43 µm, with a modal diameter of 14-17 µm (by number). Sulfides are not uniformly distributed, and are commonly observed in association with either sub-millimetre-scale plagioclase-clinopyroxene-olivine glomerocrysts or with bubbles. Maximum dissolved sulfur concentrations of 1750 ppm in melt inclusions and matrix glass
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Gallium-bearing sphalerite in a metal-sulfide nodule of the Qingzhen (EH3) chondrite
NASA Technical Reports Server (NTRS)
Rambaldi, E. R.; Rajan, R. S.; Housley, R. M.; Wang, D.
1986-01-01
The composition and possible history of the Qingshen (EH3) chondrite is presented. The chondrite contains a population of spheroidal metal-sulfide nodules, which display textural evidence of reheating and melting. Evidence of metal sulfuration is also present, suggesting replacement of metal by sulfide during melting. This process has led to the nucleation of perryite along metal-sulfide interfaces. The Ga-bearing sphalerite that was found may have formed by injection of molten sulfide droplets into the metal followed by subsolidus diffusion of Ga from the metal into the sulfide. The latter may occur because of Ga supersaturation in the metal during progressive sulfuration and its decreased affinity for the metal phase during cooling below the taenite-kamacite transition point.
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Metal sulfide and rare-earth phosphate nanostructures and methods of making same
Wong, Stanislaus; Zhang, Fen
2014-05-13
The present invention provides a method of producing a crystalline metal sulfide nanostructure. The metal is a transitional metal or a Group IV metal. In the method, a porous membrane is placed between a metal precursor solution and a sulfur precursor solution. The metal cations of the metal precursor solution and sulfur ions of the sulfur precursor solution react, thereby producing a crystalline metal sulfide nanostructure.
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Metallic sulfide additives for positive electrode material within a secondary electrochemical cell
Walsh, William J.; McPheeters, Charles C.; Yao, Neng-ping; Koura, Kobuyuki
1976-01-01
An improved active material for use within the positive electrode of a secondary electrochemical cell includes a mixture of iron disulfide and a sulfide of a polyvalent metal. Various metal sulfides, particularly sulfides of cobalt, nickel, copper, cerium and manganese, are added in minor weight proportion in respect to iron disulfide for improving the electrode performance and reducing current collector requirements.
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Metal sulfide thin films by chemical spray pyrolysis
NASA Astrophysics Data System (ADS)
Krunks, Malle; Mellikov, Enn
2001-04-01
CdS, ZnS and CuS thin films were prepared by spray pyrolysis method using metal chlorides and thiourea (tu) as starting materials. Metal sulfide films form as products of thermal decomposition of complexes Cd(tu)2Cl2, Zn(tu)2Cl2 and Cu(tu)Cl(DOT)1/2H2O, originally formed in aqueous solution at precursors molar ratio 1:2. The metal-ligand bonding is thermally stable up to 220 degrees Celsius, followed by multistep degradation process of complexes. The TG/DTA analysis show similar thermal behavior of complexes up to 300 degrees Celsius with the formation of metal sulfides in this decomposition step. In air intensive oxidation processes are detected close to 400, 600 and 720 degrees Celsius for Cu, Cd and Zn complexes, respectively. The results of thermoanalytical study and XRD of sprayed films show that CdS and ZnS films could be grown at 450 degrees Celsius even in air while deposition of copper sulfide films should be performed in an inert atmosphere. High total impurities content of 10 wt% in CdS films prepared at 240 degrees Celsius is originated from the precursor and reduced to 2 wt% by increasing the growth temperature up to 400 degrees Celsius.
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NASA Astrophysics Data System (ADS)
Muralee Gopi, Chandu V. V.; Ravi, Seenu; Rao, S. Srinivasa; Eswar Reddy, Araveeti; Kim, Hee-Je
2017-04-01
Carbon nanotubes (CNT) and metal sulfides have attracted considerable attention owing to their outstanding properties and multiple application areas, such as electrochemical energy conversion and energy storage. Here we describes a cost-effective and facile solution approach to the preparation of metal sulfides (PbS, CuS, CoS, and NiS) grown directly on CNTs, such as CNT/PbS, CNT/CuS, CNT/CoS, and CNT/NiS flexible electrodes for quantum dot-sensitized solar cells (QDSSCs) and supercapacitors (SCs). X-ray photoelectron spectroscopy, X-ray diffraction, and transmission electron microscopy confirmed that the CNT network was covered with high-purity metal sulfide compounds. QDSSCs equipped with the CNT/NiS counter electrode (CE) showed an impressive energy conversion efficiency (η) of 6.41% and remarkable stability. Interestingly, the assembled symmetric CNT/NiS-based polysulfide SC device exhibited a maximal energy density of 35.39 W h kg-1 and superior cycling durability with 98.39% retention after 1,000 cycles compared to the other CNT/metal-sulfides. The elevated performance of the composites was attributed mainly to the good conductivity, high surface area with mesoporous structures and stability of the CNTs and the high electrocatalytic activity of the metal sulfides. Overall, the designed composite CNT/metal-sulfide electrodes offer an important guideline for the development of next level energy conversion and energy storage devices.
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Muralee Gopi, Chandu V V; Ravi, Seenu; Rao, S Srinivasa; Eswar Reddy, Araveeti; Kim, Hee-Je
2017-04-19
Carbon nanotubes (CNT) and metal sulfides have attracted considerable attention owing to their outstanding properties and multiple application areas, such as electrochemical energy conversion and energy storage. Here we describes a cost-effective and facile solution approach to the preparation of metal sulfides (PbS, CuS, CoS, and NiS) grown directly on CNTs, such as CNT/PbS, CNT/CuS, CNT/CoS, and CNT/NiS flexible electrodes for quantum dot-sensitized solar cells (QDSSCs) and supercapacitors (SCs). X-ray photoelectron spectroscopy, X-ray diffraction, and transmission electron microscopy confirmed that the CNT network was covered with high-purity metal sulfide compounds. QDSSCs equipped with the CNT/NiS counter electrode (CE) showed an impressive energy conversion efficiency (η) of 6.41% and remarkable stability. Interestingly, the assembled symmetric CNT/NiS-based polysulfide SC device exhibited a maximal energy density of 35.39 W h kg -1 and superior cycling durability with 98.39% retention after 1,000 cycles compared to the other CNT/metal-sulfides. The elevated performance of the composites was attributed mainly to the good conductivity, high surface area with mesoporous structures and stability of the CNTs and the high electrocatalytic activity of the metal sulfides. Overall, the designed composite CNT/metal-sulfide electrodes offer an important guideline for the development of next level energy conversion and energy storage devices.
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MEASURING METAL SULFIDE COMPLEXES IN OXIC RIVER WATERS WITH SQUARE WAVE VOLTAMMETRY. (R825395)
A sulfide identification protocol was developed to quantify specific metal
sulfides that could exist in river water. Using a series of acid additions,
nitrogen purges, and voltammetric analyses, metal sulfides were identified and
semiquantified in three specific gr... -
Metal sulfide for battery applications
NASA Astrophysics Data System (ADS)
Guidotti, Ronald A.
1988-08-01
A number of metal sulfides can be used in batteries as a cathode (reducible) material as part of an electrochemical couple to provide energy. There are a number of physical and chemical characteristics that can be evaluated for screening potential candidates for use in batteries. These include: cell potential vs. Li, thermal and chemical stability, electrical conductivity, allotropic form (phase), reaction kinetics during discharge, type of discharge mechanism, and material rechargeability. These are reviewed in general, with emphasis on sulfides of copper, iron, and molybdenum which are currently being used as cathodes in Li and Li-alloy batteries. The presence of impurities can adversely impact performance when naturally occurring sulfide minerals are used for battery applications. Sandia National Laboratories uses natural pyrite (FeS2) for its high-temperature, thermally activated Li(Si)/FeS2 batteries. The purification and processing procedures for the FeS2 involves both chemical and physical methods. Flotation was found to yield comparable results as HF leaching for removal of silica, but without the negative health and environmental concerns associated with this technique.
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Muralee Gopi, Chandu V. V.; Ravi, Seenu; Rao, S. Srinivasa; Eswar Reddy, Araveeti; Kim, Hee-Je
2017-01-01
Carbon nanotubes (CNT) and metal sulfides have attracted considerable attention owing to their outstanding properties and multiple application areas, such as electrochemical energy conversion and energy storage. Here we describes a cost-effective and facile solution approach to the preparation of metal sulfides (PbS, CuS, CoS, and NiS) grown directly on CNTs, such as CNT/PbS, CNT/CuS, CNT/CoS, and CNT/NiS flexible electrodes for quantum dot-sensitized solar cells (QDSSCs) and supercapacitors (SCs). X-ray photoelectron spectroscopy, X-ray diffraction, and transmission electron microscopy confirmed that the CNT network was covered with high-purity metal sulfide compounds. QDSSCs equipped with the CNT/NiS counter electrode (CE) showed an impressive energy conversion efficiency (η) of 6.41% and remarkable stability. Interestingly, the assembled symmetric CNT/NiS-based polysulfide SC device exhibited a maximal energy density of 35.39 W h kg−1 and superior cycling durability with 98.39% retention after 1,000 cycles compared to the other CNT/metal-sulfides. The elevated performance of the composites was attributed mainly to the good conductivity, high surface area with mesoporous structures and stability of the CNTs and the high electrocatalytic activity of the metal sulfides. Overall, the designed composite CNT/metal-sulfide electrodes offer an important guideline for the development of next level energy conversion and energy storage devices. PMID:28422182
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Methods for producing hydrogen (BI) sulfide and/or removing metals
Truex, Michael J [Richland, WA; Peyton, Brent M [Pullman, WA; Toth, James J [Kennewick, WA
2002-05-14
The present invention is a process wherein sulfide production by bacteria is efficiently turned on and off, using pH adjustment. The adjustment of pH impacts sulfide production by bacteria by altering the relative amounts of H.sub.2 S and HS-- in solution and thereby control the inhibition of the bacterial metabolism that produces sulfide. This process can be used to make a bioreactor produce sulfide "on-demand" so that the production of sulfide can be matched to its use as a metal precipitation reagent. The present invention is of significance because it enables the use of a biological reactor, a cost effective sulfide production system, by making the biological reactor produce hydrogen sulfide "on demand", and therefore responsive to production schedules, waste stream generation rate, and health and safety requirements/goals.
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NASA Astrophysics Data System (ADS)
Kehagias, A.; Riotto, A.
2016-05-01
Symmetries play an interesting role in cosmology. They are useful in characterizing the cosmological perturbations generated during inflation and lead to consistency relations involving the soft limit of the statistical correlators of large-scale structure dark matter and galaxies overdensities. On the other hand, in observational cosmology the carriers of the information about these large-scale statistical distributions are light rays traveling on null geodesics. Motivated by this simple consideration, we study the structure of null infinity and the associated BMS symmetry in a cosmological setting. For decelerating Friedmann-Robertson-Walker backgrounds, for which future null infinity exists, we find that the BMS transformations which leaves the asymptotic metric invariant to leading order. Contrary to the asymptotic flat case, the BMS transformations in cosmology generate Goldstone modes corresponding to scalar, vector and tensor degrees of freedom which may exist at null infinity and perturb the asymptotic data. Therefore, BMS transformations generate physically inequivalent vacua as they populate the universe at null infinity with these physical degrees of freedom. We also discuss the gravitational memory effect when cosmological expansion is taken into account. In this case, there are extra contribution to the gravitational memory due to the tail of the retarded Green functions which are supported not only on the light-cone, but also in its interior. The gravitational memory effect can be understood also from an asymptotic point of view as a transition among cosmological BMS-related vacua.
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DOE Office of Scientific and Technical Information (OSTI.GOV)
Kehagias, A.; Riotto, A.; Center for Astroparticle Physics
Symmetries play an interesting role in cosmology. They are useful in characterizing the cosmological perturbations generated during inflation and lead to consistency relations involving the soft limit of the statistical correlators of large-scale structure dark matter and galaxies overdensities. On the other hand, in observational cosmology the carriers of the information about these large-scale statistical distributions are light rays traveling on null geodesics. Motivated by this simple consideration, we study the structure of null infinity and the associated BMS symmetry in a cosmological setting. For decelerating Friedmann-Robertson-Walker backgrounds, for which future null infinity exists, we find that the BMS transformationsmore » which leaves the asymptotic metric invariant to leading order. Contrary to the asymptotic flat case, the BMS transformations in cosmology generate Goldstone modes corresponding to scalar, vector and tensor degrees of freedom which may exist at null infinity and perturb the asymptotic data. Therefore, BMS transformations generate physically inequivalent vacua as they populate the universe at null infinity with these physical degrees of freedom. We also discuss the gravitational memory effect when cosmological expansion is taken into account. In this case, there are extra contribution to the gravitational memory due to the tail of the retarded Green functions which are supported not only on the light-cone, but also in its interior. The gravitational memory effect can be understood also from an asymptotic point of view as a transition among cosmological BMS-related vacua.« less
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Teuchies, Johannes; De Jonge, Maarten; Meire, Patrick; Blust, Ronny; Bervoets, Lieven
2012-08-21
The difference between the molar concentrations of simultaneously extracted metals (SEM) and acid volatile sulfides (AVS) is widely used to predict metal availability toward invertebrates in hypoxic sediments. However, this model is poorly investigated for macrophytes. The present study evaluates metal accumulation in roots and stems of the macrophyte Myriophyllum aquaticum during a 54 day lab experiment. The macrophytes, rooting in metal contaminated, hypoxic, and sulfide rich field sediments were exposed to surface water with 40% or 90% oxygen. High oxygen concentrations in the 90% treatment resulted in dissolution of the metal-sulfide complexes and a gradual increase in labile metal concentrations during the experiment. However, the general trend of increasing availability in the sediment with time was not translated in rising M. aquaticum metal concentrations. Processes at the root-sediment interface, e.g., radial oxygen loss (ROL) or the release of organic compounds by plant roots and their effect on metal availability in the rhizosphere may be of larger importance for metal accumulation than the bulk metal mobility predicted by the SEM-AVS model.
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On the existence of free and metal complexed sulfide in the Arabian Sea and its oxygen minimum zone
NASA Astrophysics Data System (ADS)
Theberge, Stephen M.; Luther, George W.; Farrenkopf, Anna M.
Free hydrogen sulfide was not detected in the oxygen minimum zone (OMZ) of the Arabian Sea during legs D1 (September 1992) and D3 (October-November 1992) of the Netherlands Indian Ocean Programme (NIOP). However, sulfide complexed to metals was detected by cathodic stripping square wave voltammetry at 2 nM or less throughout the water column. A slight increase in sulfide was measured in the OMZ relative to the surface waters and may be related to sulfur release from organic matter during decomposition. Sulfide complexes are of two general types at low concentrations of metal and sulfide. First, metals such as Mn, Fe, Co and Ni form complexes with bisulfide ion (HS -) that are kinetically labile to dissociation and are reactive. Second, metals such as Cu and Zn form multinuclear complexes with sulfide (S 2-) that are kinetically inert to dissociation; thus, they are less reactive than free (bi)sulfide and the labile metal bisulfide complexes. Zinc and copper sulfide complexes are important in allowing hydrogen sulfide to persist in seawater which contains measurable oxygen.
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Transition of Blast Furnace Slag from Silicate Based to Aluminate Based: Sulfide Capacity
NASA Astrophysics Data System (ADS)
Yan, Zhiming; Lv, Xuewei; Pang, Zhengde; He, Wenchao; Liang, Dong; Bai, Chenguang
2017-10-01
The effect of Al2O3 and Al2O3/SiO2 ratio on the sulfide capacity of the molten aluminosilicate CaO-SiO2-Al2O3-MgO-TiO2 slag system with high Al2O3 content was measured at 1773 K (1500 °C) using a metal-slag equilibration method. The sulfide capacity between silicate-based and aluminate-based slag was also compared based on the thermodynamic analysis and structural characteristics of melts. At a fixed CaO/SiO2 ratio of 1.20, the sulfide capacity decreases with increasing Al2O3 content primarily due to the decrease of free oxygen (FO) and the activity of O2-. Increasing the Al2O3/SiO2 ratio from 0.47 to 0.79 causes a significant increase in the sulfide capacity of the slags, and a slight increase is found when the Al2O3/SiO2 ratio is more than 0.79. The effect of the substitution of silica by alumina on the sulfide capacity of the slags was not only due to an increase in the activity of basic oxides ( a_{{{O}^{2 - } }} ) but also to a decrease in the stability of sulfide ( γ_{{{S}^{2 - } }} ). Moreover, a_{{{O}^{2 - } }} and γ_{{{S}^{2 - } }} increase in a similar degree, and the weaker binding electronegativity of Al3+ with oxygen atoms results in a slight increase in the final sulfide capacity in the aluminate-based slag system with Al2O3 ↔ SiO2 substitution. Five different sulfide capacity models were employed to predict the sulfide capacity, and the iso-sulfide capacity distribution diagram based on the Young's model was obtained in the high Al2O3 corner of the diagram.
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NASA Astrophysics Data System (ADS)
Lorand, Jean-Pierre; Barrat, Jean-Alix; Chevrier, Vincent; Sautter, Violaine; Pont, Sylvain
2012-11-01
Abstract-NWA 2737, a Martian meteorite from the Chassignite subclass, contains minute amounts (0.010 ± 0.005 vol%) of <span class="hlt">metal</span>-saturated Fe-Ni <span class="hlt">sulfides</span>. These latter bear evidence of the strong shock effects documented by abundant Fe nanoparticles and planar defects in Northwest Africa (NWA) 2737 olivine. A Ni-poor troilite (Fe/S = 1.0 ± 0.01), sometimes Cr-bearing (up to 1 wt%), coexists with micrometer-sized taenite/tetrataenite-type native Ni-Fe alloys (Ni/Fe = 1) and Fe-Os-Ir-(Ru) alloys a few hundreds of nanometers across. The troilite has exsolved flame-like pentlandite (Fe/Fe + Ni = 0.5-0.6). Chalcopyrite is almost lacking, and no pyrite has been found. As a hot desert find, NWA 2737 shows astonishingly fresh <span class="hlt">sulfides</span>. The composition of troilite coexisting with Ni-Fe alloys is completely at odds with Chassigny and Nahkla <span class="hlt">sulfides</span> (pyrite + <span class="hlt">metal</span>-deficient monoclinic-type pyrrhotite). It indicates strongly reducing crystallization conditions (close to IW), several log units below the fO2 conditions inferred from chromites compositions and accepted for Chassignites (FMQ-1 log unit). It is proposed that reduction in <span class="hlt">sulfides</span> into <span class="hlt">base</span> and precious <span class="hlt">metal</span> alloys is operated via sulfur degassing, which is supported by the highly resorbed and denticulated shape of <span class="hlt">sulfide</span> blebs and their spongy textures. Shock-related S degassing may be responsible for considerable damages in magmatic <span class="hlt">sulfide</span> structures and <span class="hlt">sulfide</span> assemblages, with concomitant loss of magnetic properties as documented in some other Martian meteorites.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://pubs.er.usgs.gov/publication/70022883','USGSPUBS'); return false;" href="https://pubs.er.usgs.gov/publication/70022883"><span>Influences of dietary uptake and reactive <span class="hlt">sulfides</span> on <span class="hlt">metal</span> bioavailability from aquatic sediments</span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Lee, B.-G.</p> <p>2000-01-01</p> <p>Understanding how animals are exposed to the large repository of <span class="hlt">metal</span> pollutants in aquatic sediments is complicated and is important in regulatory decisions. Experiments with four types of invertebrates showed that feeding behavior and dietary uptake control bioaccumulation of cadmium, silver, nickel, and zinc. <span class="hlt">Metal</span> concentrations in animal tissue correlated with <span class="hlt">metal</span> concentrations extracted from sediments, but not with <span class="hlt">metal</span> in porewater, across a range of reactive <span class="hlt">sulfide</span> concentrations, from 0.5 to 30 micromoles per gram. These results contradict the notion that <span class="hlt">metal</span> bioavailability in sediments is controlled by geochemical equilibration of <span class="hlt">metals</span> between porewater and reactive <span class="hlt">sulfides</span>, a proposed basis for regulatory criteria for <span class="hlt">metals</span>.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://pubs.er.usgs.gov/publication/70033591','USGSPUBS'); return false;" href="https://pubs.er.usgs.gov/publication/70033591"><span>Textural, mineralogical and stable isotope studies of hydrothermal alteration in the main <span class="hlt">sulfide</span> zone of the Great Dyke, Zimbabwe and the precious <span class="hlt">metals</span> zone of the Sonju Lake Intrusion, Minnesota, USA</span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Li, C.; Ripley, E.M.; Oberthur, T.; Miller, J.D.; Joslin, G.D.</p> <p>2008-01-01</p> <p>Stratigraphic offsets in the peak concentrations of platinum-group elements (PGE) and <span class="hlt">base-metal</span> <span class="hlt">sulfides</span> in the main <span class="hlt">sulfide</span> zone of the Great Dyke and the precious <span class="hlt">metals</span> zone of the Sonju Lake Intrusion have, in part, been attributed to the interaction between magmatic PGE-bearing <span class="hlt">base-metal</span> <span class="hlt">sulfide</span> assemblages and hydrothermal fluids. In this paper, we provide mineralogical and textural evidence that indicates alteration of <span class="hlt">base-metal</span> <span class="hlt">sulfides</span> and mobilization of <span class="hlt">metals</span> and S during hydrothermal alteration in both mineralized intrusions. Stable isotopic data suggest that the fluids involved in the alteration were of magmatic origin in the Great Dyke but that a meteoric water component was involved in the alteration of the Sonju Lake Intrusion. The strong spatial association of platinum-group minerals, principally Pt and Pd <span class="hlt">sulfides</span>, arsenides, and tellurides, with <span class="hlt">base-metal</span> <span class="hlt">sulfide</span> assemblages in the main <span class="hlt">sulfide</span> zone of the Great Dyke is consistent with residual enrichment of Pt and Pd during hydrothermal alteration. However, such an interpretation is more tenuous for the precious <span class="hlt">metals</span> zone of the Sonju Lake Intrusion where important Pt and Pd arsenides and antimonides occur as inclusions within individual plagioclase crystals and within alteration assemblages that are free of <span class="hlt">base-metal</span> <span class="hlt">sulfides</span>. Our observations suggest that Pt and Pd tellurides, antimonides, and arsenides may form during both magmatic crystallization and subsolidus hydrothermal alteration. Experimental studies of magmatic crystallization and hydrothermal transport/deposition in systems involving arsenides, tellurides, antimonides, and <span class="hlt">base</span> <span class="hlt">metal</span> <span class="hlt">sulfides</span> are needed to better understand the relative importance of magmatic and hydrothermal processes in controlling the distribution of PGE in mineralized layered intrusions of this type. ?? Springer-Verlag 2007.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/servlets/purl/863052','DOE-PATENT-XML'); return false;" href="https://www.osti.gov/servlets/purl/863052"><span>Method of treating alkali <span class="hlt">metal</span> <span class="hlt">sulfide</span> and carbonate mixtures</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Kohl, Arthur L.; Rennick, Robert D.; Savinsky, Martin W.</p> <p>1978-01-01</p> <p>A method of removing and preferably recovering sulfur values from an alkali <span class="hlt">metal</span> <span class="hlt">sulfide</span> and carbonate mixture comprising the steps of (1) introducing the mixture in an aqueous medium into a first carbonation zone and reacting the mixture with a gas containing a major amount of CO.sub.2 and a minor amount of H.sub.2 S; (2) introducing the resultant product from step 1 into a stripping zone maintained at subatmospheric pressure, and contacting this product with steam to produce a gaseous mixture, comprising H.sub.2 S and water vapor, and a liquor of reduced <span class="hlt">sulfide</span> content; (3) introducing the liquor of reduced <span class="hlt">sulfide</span> content into a second carbonation zone, and reacting the liquor with substantially pure gaseous CO.sub.2 in an amount sufficient to precipitate bicarbonate crystals and produce an offgas containing CO.sub.2 and H.sub.2 S for use in step 1; (4) recovering the bicarbonate crystals from step 3, and thermally decomposing the crystals to produce an alkaline <span class="hlt">metal</span> carbonate product and a substantially pure CO.sub.2 offgas for use in step 3.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/28772358','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/28772358"><span>Removal of <span class="hlt">metals</span> from lead-zinc mine tailings using bioleaching and followed by <span class="hlt">sulfide</span> precipitation.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Ye, Maoyou; Li, Guojian; Yan, Pingfang; Ren, Jie; Zheng, Li; Han, Dajian; Sun, Shuiyu; Huang, Shaosong; Zhong, Yujian</p> <p>2017-10-01</p> <p>Mine tailings often contain significant amounts of <span class="hlt">metals</span> and <span class="hlt">sulfide</span>, many traditional operations used to minerals was not as good as those currently available. This study investigated <span class="hlt">metals</span> removal from lead-zinc mine tailings using bioleaching and followed by <span class="hlt">sulfide</span> precipitation. <span class="hlt">Metals</span> were dissolved from the tailings by the bacteria in a bioleaching reactor. During a 10% pulp density bioleaching experiment, approximately 0.82% Pb, 97.38% Zn, and 71.37% Fe were extracted after 50 days. With the pulp density of 10% and 20%, the dissolution of <span class="hlt">metals</span> followed shrinking core kinetic model. <span class="hlt">Metals</span> (Pb, Zn, and Fe) present in the pregnant bioleaching leachate. <span class="hlt">Metals</span> were next precipitated as a <span class="hlt">sulfide</span> phase using sodium <span class="hlt">sulfide</span> (Na 2 S). <span class="hlt">Metal</span> precipitations were selectively and quantitatively produced from the bioleaching leachate by adding Na 2 S. More than 99% of the zinc and 75% of the iron was precipitated using 25 g/L Na 2 S in the bioleaching leachate. The results in the study were to provide useful information for recovering or removing <span class="hlt">metals</span> from lead-zinc mine tailings. Copyright © 2017 Elsevier Ltd. All rights reserved.</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_1");'>1</a></li> <li class="active"><span>2</span></li> <li><a href="#" onclick='return showDiv("page_3");'>3</a></li> <li><a href="#" onclick='return showDiv("page_4");'>4</a></li> <li><a href="#" onclick='return showDiv("page_5");'>5</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_2 --> <div id="page_3" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_1");'>1</a></li> <li><a href="#" onclick='return showDiv("page_2");'>2</a></li> <li class="active"><span>3</span></li> <li><a href="#" onclick='return showDiv("page_4");'>4</a></li> <li><a href="#" onclick='return showDiv("page_5");'>5</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="41"> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/27068904','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/27068904"><span>Immobilization of heavy <span class="hlt">metals</span> in electroplating sludge by biochar and iron <span class="hlt">sulfide</span>.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Lyu, Honghong; Gong, Yanyan; Tang, Jingcshun; Huang, Yao; Wang, Qilin</p> <p>2016-07-01</p> <p>Electroplating sludge (ES) containing large quantities of heavy <span class="hlt">metals</span> is regarded as a hazardous waste in China. This paper introduced a simple method of treating ES using environmentally friendly fixatives biochar (BC) and iron <span class="hlt">sulfide</span> (FeS), respectively. After 3 days of treatment with FeS at a FeS-to-ES mass ratio of 1:5, the toxicity characteristic leaching procedure (TCLP)-<span class="hlt">based</span> leachability of total Cr (TCr), Cu(II), Ni(II), Pb(II), and Zn(II) was decreased by 59.6, 100, 63.8, 73.5, and 90.5 %, respectively. After 5 days of treatment with BC at a BC-to-ES mass ratio of 1:2, the TCLP-<span class="hlt">based</span> leachability was declined by 35.1, 30.6, 22.3, 23.1, and 22.4 %, respectively. Pseudo first-order kinetic model adequately simulated the sorption kinetic data. Structure and morphology analysis showed that adsorption, electrostatic attraction, surface complexation, and chemical precipitation were dominant mechanisms for heavy <span class="hlt">metals</span> immobilization by BC, and that chemical precipitation (formation of <span class="hlt">metal</span> <span class="hlt">sulfide</span> and hydroxide precipitates), iron exchange (formation of CuFeS2), and surface complexation were mainly responsible for heavy <span class="hlt">metals</span> removal by FeS. Economic costs of BC and FeS were 500 and 768 CNY/t, lower than that of Na2S (940 CNY/t). The results suggest that BC and FeS are effective, economic, and environmentally friendly fixatives for immobilization of heavy <span class="hlt">metals</span> in ES before landfill disposal.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/pages/biblio/1393864-hierarchically-superstructured-metal-sulfides-facile-perturbation-assisted-nanofusion-synthesis-visible-light-photocatalytic-characterizations','SCIGOV-DOEP'); return false;" href="https://www.osti.gov/pages/biblio/1393864-hierarchically-superstructured-metal-sulfides-facile-perturbation-assisted-nanofusion-synthesis-visible-light-photocatalytic-characterizations"><span>Hierarchically Superstructured <span class="hlt">Metal</span> <span class="hlt">Sulfides</span>: Facile Perturbation-Assisted Nanofusion Synthesis and Visible Light Photocatalytic Characterizations</span></a></p> <p><a target="_blank" href="http://www.osti.gov/pages">DOE PAGES</a></p> <p>Yue, Yanfeng; Li, Yunchao; Bridges, Craig A.; ...</p> <p>2016-11-29</p> <p>A novel and simple perturbation-assisted nanofusion (PNF) synthetic strategy was developed for the fabrication of stable hierarchically superstructured <span class="hlt">metal</span> <span class="hlt">sulfides</span>. This promising approach, <span class="hlt">based</span> on a kinetically controlled precipitation to simultaneously condense and re-dissolve polymorphic nanocrystallites, provides the resultant samples with a unique mesoporous framework. This PNF approach is environmentally friendly, produces gram-scale products in a matter of hours, and is complimentary to traditional hard or soft templating methods for the construction of mesoporous <span class="hlt">metal</span> <span class="hlt">sulfides</span>. PNF derived hierarchical porous CdS exhibited a vastly improved photocatalytic performance over its commercial bulk counterpart under visible light irradiation, demonstrating the advantage ofmore » the porous morphology for photocatalysis resulting from the enlarged surface area and the easy accessibility of the mesopores.« less</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/servlets/purl/1016748','DOE-PATENT-XML'); return false;" href="https://www.osti.gov/servlets/purl/1016748"><span>Single-layer transition <span class="hlt">metal</span> <span class="hlt">sulfide</span> catalysts</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Thoma, Steven G [Albuquerque, NM</p> <p>2011-05-31</p> <p>Transition <span class="hlt">Metal</span> <span class="hlt">Sulfides</span> (TMS), such as molybdenum disulfide (MoS.sub.2), are the petroleum industry's "workhorse" catalysts for upgrading heavy petroleum feedstocks and removing sulfur, nitrogen and other pollutants from fuels. We have developed an improved synthesis technique to produce SLTMS catalysts, such as molybdenum disulfide, with potentially greater activity and specificity than those currently available. Applications for this technology include heavy feed upgrading, in-situ catalysis, bio-fuel conversion and coal liquefaction.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2017PhDT........63Y','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2017PhDT........63Y"><span>Synthesis and characterization of transition <span class="hlt">metal</span> oxide/<span class="hlt">sulfide</span> nanostructures for electrochemical applications</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Yilmaz, Gamze</p> <p></p> <p>This thesis is essentially oriented to develop low-cost nanostructured transition <span class="hlt">metal</span> (nickel and vanadium) oxides and <span class="hlt">sulfides</span> with high energy density, power density and electrochemical stability via strategies of structural design, hybridization, functionalization and surface engineering. <span class="hlt">Metal</span> oxide and <span class="hlt">metal</span> oxide/<span class="hlt">sulfide</span> hybrid nanostructures in several designs, including hierarchical porous nanostructures, hollow polyhedrons, nanocubes, nanoframes, octopod nanoframes, and nanocages, were synthesized to study the contribution of structural design, compositional engineering, functionalization and surface engineering to the electrochemical properties of the materials. Modulated compositional and structural features disclosed the opportunities of large accessible active sites, facile ion transport, robustness and enhanced electrical conductivity. The best electrochemical performance with merits of highest energy density (38.9 Wh kg-1), power density (7.4 kW kg-1) and electrochemical stability (90.9% after 10000 cycles) was obtained for nickel cobalt layered double hydroxide/cobalt <span class="hlt">sulfide</span> (NiCo-LDH/Co9S8) hybrid hollow polyhedron structure.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/20070023478','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/20070023478"><span>The Formation and Chronology of the PAT 91501 Impact-Melt L-Chondrite with Vesicle-<span class="hlt">Metal-Sulfide</span> Assemblages</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Benedix, G. K.; Ketcham, R. A.; Wilson, L.; McCoy, T. J.; Bogard, D. D.; Garrison, D. H.; Herzog, G. F.; Xue, S.; Klein, J.; Middleton, R.</p> <p>2007-01-01</p> <p>The L chondrite Patuxent Range (PAT) 41 91501 is an 8.5-kg unshocked, homogeneous, igneous-textured impact melt that cooled slowly compared to other meteoritic impact melts in a crater floor melt sheet or sub-crater dike. We conducted mineralogical and tomographic studies of previously unstudied mm- to cm-sized <span class="hlt">metal-sulfide</span>-vesicle assemblages and chronologic studies of the silicate host. <span class="hlt">Metal-sulfide</span> clasts constitute about 1 vol.%, comprise zoned taenite, troilite and pentlandite, and exhibit a consistent orientation between <span class="hlt">metal</span> and <span class="hlt">sulfide</span> and of <span class="hlt">metal-sulfide</span> contacts. Vesicles make up approximately 2 vol.% and exhibit a similar orientation of long axes. Ar-39-Ar-40 measurements date the time of impact at 4.461 +/- 0.008 Gyr B.P. Cosmogenic noble gases and Be-10 and Al-2l activities suggest a pre-atmospheric radius of 40-60 cm and a cosmic ray exposure age of 25-29 Myr, similar to ages of a cluster of L chondrites. PAT 91501 dates the oldest known impact on the L chondrite parent body. The dominant vesicle-forming gas was S2 (approximately 15-20 ppm), which formed in equilibrium with impact-melted <span class="hlt">sulfides</span>. The meteorite formed in an impact melt dike beneath a crater, as did other impact melted L chondrites, such as Chico. Cooling and solidification occurred over approximately 2 hours. During this time, approximately 90% of <span class="hlt">metal</span> and <span class="hlt">sulfide</span> segregated from the local melt. Remaining <span class="hlt">metal</span> and <span class="hlt">sulfide</span> grains oriented themselves in the local gravitational field, a feature nearly unique among meteorites. Many of these <span class="hlt">metal</span> <span class="hlt">sulfide</span> grains adhered to vesicles to form aggregates that may have been close to neutrally buoyant. These aggregates would have been carried upward with the residual melt, inhibiting further buoyancy-driven segregation. Although similar processes operated individually in other chondritic impact melts, their interaction produced the unique assemblage observed in PAT 91501.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3727212','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3727212"><span>The Hydrolysis of Carbonyl <span class="hlt">Sulfide</span> at Low Temperature: A Review</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Zhao, Shunzheng; Yi, Honghong; Tang, Xiaolong; Jiang, Shanxue; Gao, Fengyu; Zhang, Bowen; Zuo, Yanran; Wang, Zhixiang</p> <p>2013-01-01</p> <p>Catalytic hydrolysis technology of carbonyl <span class="hlt">sulfide</span> (COS) at low temperature was reviewed, including the development of catalysts, reaction kinetics, and reaction mechanism of COS hydrolysis. It was indicated that the catalysts are mainly involved <span class="hlt">metal</span> oxide and activated carbon. The active ingredients which can load on COS hydrolysis catalyst include alkali <span class="hlt">metal</span>, alkaline earth <span class="hlt">metal</span>, transition <span class="hlt">metal</span> oxides, rare earth <span class="hlt">metal</span> oxides, mixed <span class="hlt">metal</span> oxides, and nanometal oxides. The catalytic hydrolysis of COS is a first-order reaction with respect to carbonyl <span class="hlt">sulfide</span>, while the reaction order of water changes as the reaction conditions change. The controlling steps are also different because the reaction conditions such as concentration of carbonyl <span class="hlt">sulfide</span>, reaction temperature, water-air ratio, and reaction atmosphere are different. The hydrolysis of carbonyl <span class="hlt">sulfide</span> is <span class="hlt">base</span>-catalyzed reaction, and the force of the <span class="hlt">base</span> site has an important effect on the hydrolysis of carbonyl <span class="hlt">sulfide</span>. PMID:23956697</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=61090&keyword=avs&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50','EPA-EIMS'); return false;" href="https://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=61090&keyword=avs&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50"><span>MODIFICATION OF <span class="hlt">METAL</span> PARTITIONING BY SUPPLEMENTING ACID VOLATILE <span class="hlt">SULFIDE</span> IN FRESHWATER SEDIMENTS</span></a></p> <p><a target="_blank" href="http://oaspub.epa.gov/eims/query.page">EPA Science Inventory</a></p> <p></p> <p></p> <p>Acid volatile <span class="hlt">sulfide</span> is a component of sediments which complexes some cationic <span class="hlt">metals</span> and thereby influences the toxicity of these <span class="hlt">metals</span> to benthic organisms. EPA has proposed AVS as a key normalization phase for the development of sediment quality criteria for <span class="hlt">metals</span>. Experime...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/21598657','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/21598657"><span>[Regulation of sulfates, hydrogen <span class="hlt">sulfide</span> and heavy <span class="hlt">metals</span> in technogenic reservoirs by sulfate-reducing bacteria].</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Hudz', S P; Peretiatko, T B; Moroz, O M; Hnatush, S O; Klym, I R</p> <p>2011-01-01</p> <p>Sulfate-reducing bacteria Desulfovibrio desulfuricans Ya-11 in the presence of sulfates and organic compounds in the medium reduce sulfates to hydrogen <span class="hlt">sulfide</span> (dissimilatory sulfate reduction). Heavy <span class="hlt">metals</span> in concentration over 2 mM inhibit this process. Pb2+, Zn2+, Ni2+, Co2+, Fe2+ and Cd2+ ions in concentration 1-1.5 mM display insignificant inhibiting effect on sulfate reduction process, and <span class="hlt">metals</span> precipitate in the form of <span class="hlt">sulfides</span>. At concentrations of heavy <span class="hlt">metals</span> 2-3 mM one can observe a decrease of sulfates reduction intensity, and a percent of <span class="hlt">metals</span> binding does not exceed 72%. Obtained results give reason to confirm, that sulfate-reducing bacteria play an important role in regulation of the level of sulfates, hydrogen <span class="hlt">sulfide</span> and heavy <span class="hlt">metals</span> in reservoirs and they may be used for purification of water environment from these compounds.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/19940011815','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/19940011815"><span>Experimental segregation of iron-nickel <span class="hlt">metal</span>, iron-<span class="hlt">sulfide</span>, and olivine in a thermal gradient: Preliminary results</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Jurewicz, Stephen R.; Jones, J. H.</p> <p>1993-01-01</p> <p>Speculation about the possible mechanisms for core formation in small asteroids raises more questions than answers. Petrologic evidence from iron meteorites, pallasites, and astronomical observations of M asteroids suggests that many small bodies were capable of core formation. Recent work by Taylor reviews the geochemical evidence and examines the possible physical/mechanical constraints on segregation processes. Taylor's evaluation suggests that extensive silicate partial melting (preferably 50 vol. percent or greater) is required before <span class="hlt">metal</span> can segregate from the surrounding silicate and form a <span class="hlt">metal</span> core. The arguments for large degrees of silicate partial melting are two-fold: (1) elemental trends in iron meteorites require that the <span class="hlt">metal</span> was at is liquidus; and (2) experimental observations of <span class="hlt">metal/sulfide</span> inclusions in partially molten silicate meteorites show that the <span class="hlt">metal/sulfide</span> tends to form spherules in the liquid silicate due to surface tension effects. Taylor points out that for these <span class="hlt">metal</span> spherules to sink through a silicate mush, high degrees of silicate partial melting are required to lower the silicate yield strength. Although some qualitative experimental data exists, little is actually known about the behavior of <span class="hlt">metals</span> and liquid <span class="hlt">sulfides</span> dispersed in silicate systems. In addition, we have been impressed with the ability of cumulative olivine to expel trapped liquid when placed in a thermal gradient. Consequently, we undertook to accomplish the following: (1) experimentally evaluate the potential for <span class="hlt">metal/sulfide</span>/silicate segregation in a thermal gradient; and (2) obtain quantitative data of the wetting parameters of <span class="hlt">metal-sulfide</span> melts among silicate grains.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://pubs.er.usgs.gov/publication/70022387','USGSPUBS'); return false;" href="https://pubs.er.usgs.gov/publication/70022387"><span>Influence of acid volatile <span class="hlt">sulfide</span> and <span class="hlt">metal</span> concentrations on <span class="hlt">metal</span> bioavailability to marine invertebrates in contaminated sediments</span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Lee, B.-G.; Lee, J.-S.; Luoma, S.N.; Choi, H.J.; Koh, C.-H.</p> <p>2000-01-01</p> <p>An 18-day microcosm study was conducted to evaluate the influence of acid volatile <span class="hlt">sulfides</span> (AVS) and <span class="hlt">metal</span> additions on bioaccumulation from sediments of Cd, Ni, and Zn in two clams (Macoma balthica and Potamocorbula amurensis) and three marine polychaetes (Neanthes arenaceodentata, Heteromastus filiformis, and Spiophanes missionensis). Manipulation of AVS by oxidation of naturally anoxic sediments allowed use of <span class="hlt">metal</span> concentrations typical of nature and evaluation of processes important to chronic <span class="hlt">metal</span> exposure. A vertical sediment column similar to that often found in nature was used to facilitate realistic biological behavior. Results showed that AVS or porewater (PW) <span class="hlt">metals</span> controlled bioaccumulation in only 2 of 15 <span class="hlt">metal</span>-animal combinations. Bioaccumulation of all three <span class="hlt">metals</span> by the bivalves was related significantly to <span class="hlt">metal</span> concentrations extracted from sediments (SEM) but not to [SEM - AVS] or PW <span class="hlt">metals</span>. SEM predominantly influenced bioaccumulation of Ni and Zn in N. arenaceodentata, but Cd bioaccumulation followed PW Cd concentrations. SEM controlled tissue concentrations of all three <span class="hlt">metals</span> in H. filiformis and S. missionensis, with minor influences from <span class="hlt">metal-sulfide</span> chemistry. Significant bioaccumulation occurred when SEM was only a small fraction of AVS in several treatments. Three factors appeared to contribute to the differences between these bioaccumulation results and the results from toxicity tests reported previously: differences in experimental design, dietary uptake, and biological attributes of the species, including mode and depth of feeding.An 18-day microcosm study was conducted to evaluate the influence of acid volatile <span class="hlt">sulfides</span> (AVS) and <span class="hlt">metal</span> additions on bioaccumulation from sediments of Cd, Ni, and Zn in two clams (Macoma balthica and Potamocorbula amurensis) and three marine polychaetes (Neanthes arenaceodentata, Heteromastus filiformis, and Spiophanes missionensis). Manipulation of AVS by oxidation of naturally anoxic sediments</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2013ChJOL..31.1079Z','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2013ChJOL..31.1079Z"><span>Acid volatile <span class="hlt">sulfide</span> and simultaneously extracted <span class="hlt">metals</span> in superficial sediments from Baihua Lake, China</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Zhang, Jiping; Hu, Jiwei; Huang, Xianfei; Shen, Wei; Jin, Mei; Fu, Liya; Jin, Xiaofei</p> <p>2013-09-01</p> <p>The bioavailability of five divalent cationic heavy <span class="hlt">metals</span> (Pb, Cd, Cu, Zn and Ni) in 10 superficial sediment samples from Baihua Lake was assessed <span class="hlt">based</span> on the molar ratio of simultaneously extracted <span class="hlt">metals</span> (SEMs) to acid volatile <span class="hlt">sulfide</span> (AVS). Atomic absorption spectrometry (AAS) and X-ray powder diffraction (XRD) were used to determine the heavy <span class="hlt">metal</span> concentrations and examine the mineralogy of the crystalline phases, respectively. The AVS loadings in sediments from Baihua Lake ranged from 64.30 to 350.08 μmol/g (dry weight). The corresponding SEM levels for the sampling sites varied from 1.770 to 14.660 μmol/g. The molar ratio of SEMs to AVS ranged from 0.014 to 0.084 with a mean value of 0.034. The XRD analysis also confirmed the presence of some <span class="hlt">metal</span> <span class="hlt">sulfides</span> in sediments from Baihua Lake. The SEMs/AVS ratios for all sampling sites were significantly lower than 1.0, indicating that AVS in the sediments was sufficient to bind the five heavy <span class="hlt">metals</span>; thus, these heavy <span class="hlt">metals</span> are currently not significantly bioavailable to benthic organisms. Comparing the SEMs results to published guideline values for <span class="hlt">metal</span> toxicity to benthic organisms in sediments, however, suggests that Zn and Ni pose a risk at some sampling locations in Baihua Lake.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2005JNR.....7..389L','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2005JNR.....7..389L"><span><span class="hlt">Metal</span> <span class="hlt">Sulfide</span> Cluster Complexes and their Biogeochemical Importance in the Environment</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Luther, George W.; Rickard, David T.</p> <p>2005-10-01</p> <p>Aqueous clusters of FeS, ZnS and CuS constitute a major fraction of the dissolved <span class="hlt">metal</span> load in anoxic oceanic, sedimentary, freshwater and deep ocean vent environments. Their ubiquity explains how <span class="hlt">metals</span> are transported in anoxic environmental systems. Thermodynamic and kinetic considerations show that they have high stability in oxic aqueous environments, and are also a significant fraction of the total <span class="hlt">metal</span> load in oxic river waters. Molecular modeling indicates that the clusters are very similar to the basic structural elements of the first condensed phase forming from aqueous solutions in the Fe-S, Zn-S and Cu-S systems. The structure of the first condensed phase is determined by the structure of the cluster in solution. This provides an alternative explanation of Ostwald's Rule, where the most soluble, metastable phases form before the stable phases. For example, in the case of FeS, we showed that the first condensed phase is nanoparticulate, metastable mackinawite with a particle size of 2 nm consisting of about 150 FeS subunits, representing the end of a continuum between aqueous FeS clusters and condensed material. These <span class="hlt">metal</span> <span class="hlt">sulfide</span> clusters and nanoparticles are significant in biogeochemistry. <span class="hlt">Metal</span> <span class="hlt">sulfide</span> clusters reduce <span class="hlt">sulfide</span> and <span class="hlt">metal</span> toxicity and help drive ecology. FeS cluster formation drives vent ecology and AgS cluster formation detoxifies Ag in Daphnia magna neonates. We also note a new reaction between FeS and DNA and discuss the potential role of FeS clusters in denaturing DNA.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2010GeCoA..74.1719S','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2010GeCoA..74.1719S"><span>High-temperature experimental analogs of primitive meteoritic <span class="hlt">metal-sulfide</span>-oxide assemblages</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Schrader, Devin L.; Lauretta, Dante S.</p> <p>2010-03-01</p> <p>We studied the oxidation-<span class="hlt">sulfidation</span> behavior of an Fe-<span class="hlt">based</span> alloy containing 4.75 wt.% Ni, 0.99 wt.% Co, 0.89 wt.% Cr, and 0.66 wt.% P in H 2-H 2O-CO-CO 2-H 2S gas mixtures at 1000 °C. The samples were cooled at rates of ˜3000 °C/h, comparable to estimates of the conditions after a chondrule-formation event in the early Solar System. Gas compositions were monitored in real time by a quadrupole mass spectrometer residual gas analyzer. Linear rate constants associated with gas-phase adsorption were determined. Reaction products were analyzed by optical microscopy, wavelength-dispersive-spectroscopy X-ray elemental mapping, and electron probe microanalysis. <span class="hlt">Based</span> on analysis of the Fe-Ni-S ternary phase diagram and the reaction products, the primary corrosion product is a liquid of composition 66.6 wt.% Fe, 3.5 wt.% Ni, 29.9 wt.% S, and minor amounts of P, Cr, and Co. Chromite (FeCr 2O 4) inclusions formed by oxidation and are present in the <span class="hlt">metal</span> foil and at the outer boundary between the <span class="hlt">sulfide</span> and experimental atmosphere. During cooling the liquid initially crystallizes into taenite (average composition ˜15 wt.% Ni), monosulfide solid solution [mss, (Fe,Ni,Co,Cr) 1-xS], and Fe-phosphates. Upon further cooling, kamacite exsolves from this <span class="hlt">metal</span>, enriching the taenite in Ni. The remnant <span class="hlt">metal</span> core is enriched in P and Co and depleted in Cr at the reaction interface, relative to the starting composition. The unreacted <span class="hlt">metal</span> core composition remains unchanged, suggesting the reactions did not reach equilibrium. We present a detailed model of reaction mechanisms <span class="hlt">based</span> on the observed kinetics and sample morphologies, and discuss meteoritic analogs in the CR chondrite MacAlpine Hills 87320.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2008GeCoA..72.2417B','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2008GeCoA..72.2417B"><span>The formation and chronology of the PAT 91501 impact-melt L chondrite with vesicle <span class="hlt">metal</span> <span class="hlt">sulfide</span> assemblages</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Benedix, G. K.; Ketcham, R. A.; Wilson, L.; McCoy, T. J.; Bogard, D. D.; Garrison, D. H.; Herzog, G. F.; Xue, S.; Klein, J.; Middleton, R.</p> <p>2008-05-01</p> <p>The L chondrite Patuxent Range (PAT) 91501 is an 8.5-kg unshocked, homogeneous, igneous-textured impact melt that cooled slowly compared to other meteoritic impact melts in a crater floor melt sheet or sub-crater dike [Mittlefehldt D. W. and Lindstrom M. M. (2001) Petrology and geochemistry of Patuxent Range 91501 and Lewis Cliff 88663. Meteoritics Planet. Sci. 36, 439-457]. We conducted mineralogical and tomographic studies of previously unstudied mm- to cm-sized <span class="hlt">metal-sulfide</span>-vesicle assemblages and chronologic studies of the silicate host. <span class="hlt">Metal-sulfide</span> clasts constitute about 1 vol.%, comprise zoned taenite, troilite, and pentlandite, and exhibit a consistent orientation between <span class="hlt">metal</span> and <span class="hlt">sulfide</span> and of <span class="hlt">metal-sulfide</span> contacts. Vesicles make up ˜2 vol.% and exhibit a similar orientation of long axes. 39Ar- 40Ar measurements probably date the time of impact at 4.461 ± 0.008 Gyr B.P. Cosmogenic noble gases and 10Be and 26Al activities suggest a pre-atmospheric radius of 40-60 cm and a cosmic ray exposure age of 25-29 Myr, similar to ages of a cluster of L chondrites. PAT 91501 dates the oldest known impact on the L chondrite parent body. The dominant vesicle-forming gas was S 2 (˜15-20 ppm), which formed in equilibrium with impact-melted <span class="hlt">sulfides</span>. The meteorite formed in an impact melt dike beneath a crater, as did other impact melted L chondrites, such as Chico. Cooling and solidification occurred over ˜2 h. During this time, ˜90% of <span class="hlt">metal</span> and <span class="hlt">sulfide</span> segregated from the local melt. Remaining <span class="hlt">metal</span> and <span class="hlt">sulfide</span> grains oriented themselves in the local gravitational field, a feature nearly unique among meteorites. Many of these <span class="hlt">metal-sulfide</span> grains adhered to vesicles to form aggregates that may have been close to neutrally buoyant. These aggregates would have been carried upward with the residual melt, inhibiting further buoyancy-driven segregation. Although similar processes operated individually in other chondritic impact melts, their interaction produced</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/23819689','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/23819689"><span>Mercury mobilization in a flooded soil by incorporation into <span class="hlt">metallic</span> copper and <span class="hlt">metal</span> <span class="hlt">sulfide</span> nanoparticles.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Hofacker, Anke F; Voegelin, Andreas; Kaegi, Ralf; Kretzschmar, Ruben</p> <p>2013-07-16</p> <p>Mercury is a highly toxic priority pollutant that can be released from wetlands as a result of biogeochemical redox processes. To investigate the temperature-dependent release of colloidal and dissolved Hg induced by flooding of a contaminated riparian soil, we performed laboratory microcosm experiments at 5, 14, and 23 °C. Our results demonstrate substantial colloidal Hg mobilization concomitant with Cu prior to the main period of sulfate reduction. For Cu, we previously showed that this mobilization was due to biomineralization of <span class="hlt">metallic</span> Cu nanoparticles associated with suspended bacteria. X-ray absorption spectroscopy at the Hg LIII-edge showed that colloidal Hg corresponded to Hg substituting for Cu in the <span class="hlt">metallic</span> Cu nanoparticles. Over the course of microbial sulfate reduction, colloidal Hg concentrations decreased but continued to dominate total Hg in the pore water for up to 5 weeks of flooding at all temperatures. Transmission electron microscopy (TEM) suggested that Hg became associated with Cu-rich mixed <span class="hlt">metal</span> <span class="hlt">sulfide</span> nanoparticles. The formation of Hg-containing <span class="hlt">metallic</span> Cu and <span class="hlt">metal</span> <span class="hlt">sulfide</span> nanoparticles in contaminated riparian soils may influence the availability of Hg for methylation or volatilization processes and has substantial potential to drive Hg release into adjacent water bodies.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=75417&keyword=rocks+AND+minerals&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50','EPA-EIMS'); return false;" href="https://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=75417&keyword=rocks+AND+minerals&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50"><span><span class="hlt">SULFIDE</span> MINERALS IN SEDIMENTS</span></a></p> <p><a target="_blank" href="http://oaspub.epa.gov/eims/query.page">EPA Science Inventory</a></p> <p></p> <p></p> <p>The formation processes of <span class="hlt">metal</span> <span class="hlt">sulfides</span> in sediments, especially iron <span class="hlt">sulfides</span>, have been the subjects of intense scientific research because of linkages to the global biogeochemical cycles of iron, sulfur, carbon, and oxygen. Transition <span class="hlt">metal</span> <span class="hlt">sulfides</span> (e.g., NiS, CuS, ZnS, Cd...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2014JChPh.140q4712L','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2014JChPh.140q4712L"><span>The <span class="hlt">metallization</span> and superconductivity of dense hydrogen <span class="hlt">sulfide</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Li, Yinwei; Hao, Jian; Liu, Hanyu; Li, Yanling; Ma, Yanming</p> <p>2014-05-01</p> <p>Hydrogen <span class="hlt">sulfide</span> (H2S) is a prototype molecular system and a sister molecule of water (H2O). The phase diagram of solid H2S at high pressures remains largely unexplored arising from the challenges in dealing with the pressure-induced weakening of S-H bond and larger atomic core difference between H and S. <span class="hlt">Metallization</span> is yet achieved for H2O, but it was observed for H2S above 96 GPa. However, the <span class="hlt">metallic</span> structure of H2S remains elusive, greatly impeding the understanding of its <span class="hlt">metallicity</span> and the potential superconductivity. We have performed an extensive structural study on solid H2S at pressure ranges of 10-200 GPa through an unbiased structure prediction method <span class="hlt">based</span> on particle swarm optimization algorithm. Besides the findings of candidate structures for nonmetallic phases IV and V, we are able to establish stable <span class="hlt">metallic</span> structures violating an earlier proposal of elemental decomposition into sulfur and hydrogen [R. Rousseau, M. Boero, M. Bernasconi, M. Parrinello, and K. Terakura, Phys. Rev. Lett. 85, 1254 (2000)]. Our study unravels a superconductive potential of <span class="hlt">metallic</span> H2S with an estimated maximal transition temperature of ˜80 K at 160 GPa, higher than those predicted for most archetypal hydrogen-containing compounds (e.g., SiH4, GeH4, etc.).</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2017Litho.276..103H','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2017Litho.276..103H"><span>Paradoxical co-existing <span class="hlt">base</span> <span class="hlt">metal</span> sulphides in the mantle: The multi-event record preserved in Loch Roag peridotite xenoliths, North Atlantic Craton</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Hughes, Hannah S. R.; McDonald, Iain; Loocke, Matthew; Butler, Ian B.; Upton, Brian G. J.; Faithfull, John W.</p> <p>2017-04-01</p> <p>The role of the subcontinental lithospheric mantle as a source of precious <span class="hlt">metals</span> for mafic magmas is contentious and, given the chalcophile (and siderophile) character of <span class="hlt">metals</span> such as the platinum-group elements (PGE), Se, Te, Re, Cu and Au, the mobility of these <span class="hlt">metals</span> is intimately linked with that of sulphur. Hence the nature of the host phase(s), and their age and stability in the subcontinental lithospheric mantle may be of critical importance. We investigate the sulphide mineralogy and sulphide in situ trace element compositions in <span class="hlt">base</span> <span class="hlt">metal</span> sulphides (<span class="hlt">BMS</span>) in a suite of spinel lherzolite mantle xenoliths from northwest Scotland (Loch Roag, Isle of Lewis). This area is situated on the margin of the North Atlantic Craton which has been overprinted by a Palaeoproterozoic orogenic belt, and occurs in a region which has undergone magmatic events from the Palaeoproterozoic to the Eocene. We identify two populations of co-existing <span class="hlt">BMS</span> within a single spinel lherzolite xenolith (LR80) and which can also be recognised in the peridotite xenolith suite as a whole. Both populations consist of a mixture of Fe-Ni-Cu sulphide minerals, and we distinguished between these according to <span class="hlt">BMS</span> texture, petrographic setting (i.e., location within the xenolith in terms of 'interstitial' or within feldspar-spinel symplectites, as demonstrated by X-ray Computed Microtomography) and in situ trace element composition. Group A <span class="hlt">BMS</span> are coarse, metasomatic, have low concentrations of total PGE (< 40 ppm) and high (Re/Os)N (ranging 1 to 400). Group B <span class="hlt">BMS</span> strictly occur within symplectites of spinel and feldspar, are finer-grained rounded droplets, with micron-scale PtS (cooperite), high overall total PGE concentrations (15-800 ppm) and low (Re/Os)N ranging 0.04 to 2. Group B <span class="hlt">BMS</span> sometimes coexist with apatite, and both the Group B <span class="hlt">BMS</span> and apatite can preserve rounded micron-scale Ca-carbonate inclusions indicative of sulphide-carbonate-phosphate immiscibility. This carbonate</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.gpo.gov/fdsys/pkg/CFR-2010-title23-vol1/pdf/CFR-2010-title23-vol1-sec971-210.pdf','CFR'); return false;" href="https://www.gpo.gov/fdsys/pkg/CFR-2010-title23-vol1/pdf/CFR-2010-title23-vol1-sec971-210.pdf"><span>23 CFR 971.210 - Federal lands bridge management system (<span class="hlt">BMS</span>).</span></a></p> <p><a target="_blank" href="http://www.gpo.gov/fdsys/browse/collectionCfr.action?selectedYearFrom=2010&page.go=Go">Code of Federal Regulations, 2010 CFR</a></p> <p></p> <p>2010-04-01</p> <p>... 23 Highways 1 2010-04-01 2010-04-01 false Federal lands bridge management system (<span class="hlt">BMS</span>). 971.210... lands bridge management system (<span class="hlt">BMS</span>). In addition to the requirements provided in § 971.204, the <span class="hlt">BMS</span> must meet the following requirements: (a) The tri-party partnership shall have a <span class="hlt">BMS</span> for the FH bridges...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.gpo.gov/fdsys/pkg/CFR-2010-title23-vol1/pdf/CFR-2010-title23-vol1-sec972-210.pdf','CFR'); return false;" href="https://www.gpo.gov/fdsys/pkg/CFR-2010-title23-vol1/pdf/CFR-2010-title23-vol1-sec972-210.pdf"><span>23 CFR 972.210 - Federal lands bridge management system (<span class="hlt">BMS</span>).</span></a></p> <p><a target="_blank" href="http://www.gpo.gov/fdsys/browse/collectionCfr.action?selectedYearFrom=2010&page.go=Go">Code of Federal Regulations, 2010 CFR</a></p> <p></p> <p>2010-04-01</p> <p>... 23 Highways 1 2010-04-01 2010-04-01 false Federal lands bridge management system (<span class="hlt">BMS</span>). 972.210....210 Federal lands bridge management system (<span class="hlt">BMS</span>). In addition to the requirements provided in § 972.204, the <span class="hlt">BMS</span> must meet the following requirements: (a) The FWS shall have a <span class="hlt">BMS</span> for bridges which are...</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_1");'>1</a></li> <li><a href="#" onclick='return showDiv("page_2");'>2</a></li> <li class="active"><span>3</span></li> <li><a href="#" onclick='return showDiv("page_4");'>4</a></li> <li><a href="#" onclick='return showDiv("page_5");'>5</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_3 --> <div id="page_4" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_2");'>2</a></li> <li><a href="#" onclick='return showDiv("page_3");'>3</a></li> <li class="active"><span>4</span></li> <li><a href="#" onclick='return showDiv("page_5");'>5</a></li> <li><a href="#" onclick='return showDiv("page_6");'>6</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="61"> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2015JPS...285..185G','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2015JPS...285..185G"><span>Higher-efficiency photoelectrochemical electrodes of titanium dioxide-<span class="hlt">based</span> nanoarrays sensitized simultaneously with plasmonic silver nanoparticles and multiple <span class="hlt">metal</span> <span class="hlt">sulfides</span> photosensitizers</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Guo, Keying; Liu, Zhifeng; Han, Jianhua; Zhang, Xueqi; Li, Yajun; Hong, Tiantian; Zhou, Cailou</p> <p>2015-07-01</p> <p>This paper describes a novel design of high-efficiency photoelectrochemical water splitting electrode, i.e., ordered TiO2 nanorod arrays (NRs) sensitized simultaneously with noble <span class="hlt">metal</span> (Ag), binary <span class="hlt">metal</span> <span class="hlt">sulfides</span> (Ag2S) and ternary <span class="hlt">metal</span> <span class="hlt">sulfides</span> (Ag3CuS2) multiple photosensitizers for the first time. The TiO2/Ag/Ag2S/Ag3CuS2 NRs heterostructure is successfully synthesized through successive ion layer adsorption and reaction (SILAR) and a simple ion-exchange process <span class="hlt">based</span> on ionic reaction mechanism. On the basis of an optimal quantity of Ag, Ag2S and Ag3CuS2 nanoparticles, such TiO2/Ag/Ag2S/Ag3CuS2 NRs exhibit a higher photoelectrochemical activity ever reported for TiO2-<span class="hlt">based</span> nanoarrays in PEC water splitting, the photocurrent density is up to 9.82 mA cm-2 at 0.47 V versus Ag/AgCl, respectively. This novel architecture is able to increase electron collection efficiency and suppress carrier recombination via (i) a higher efficiency of light-harvesting through these multiple photosensitizers (Ag, Ag2S and Ag3CuS2); (ii) the efficient separation of photo-induced electrons and holes due to the direct electrical pathways; (iii) the surface plasmon resonance (SPR) effect of Ag nanoparticles, which enhances the efficient charge separation and high carrier mobility. This work is useful to explore feasible routes to further enhance the performance of oxide semiconductors for PEC water splitting to produce clean H2 energy.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=163842','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=163842"><span>Antibacterial activity of <span class="hlt">BMS</span>-180680, a new catechol-containing monobactam.</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Fung-Tomc, J; Bush, K; Minassian, B; Kolek, B; Flamm, R; Gradelski, E; Bonner, D</p> <p>1997-01-01</p> <p>The in vitro activities of a new catechol-containing monobactam, <span class="hlt">BMS</span>-180680 (SQ 84,100), were compared to those of aztreonam, ceftazidime, imipenem, piperacillin-tazobactam, ciprofloxacin, amikacin, and trimethoprim-sulfamethoxazole. <span class="hlt">BMS</span>-180680 was often the most active compound against many species of the family Enterobacteriaceae, with MICs at which 90% of the isolates were inhibited (MIC90s) of < or = 0.5 microg/ml for Escherichia coli, Klebsiella spp., Citrobacter diversus, Enterobacter aerogenes, Serratia marcescens, Proteus spp., and Providencia spp. <span class="hlt">BMS</span>-180680 had moderate activities (MIC90s of 2 to 8 microg/ml) against Citrobacter freundii, Morganella morganii, Shigella spp., and non-E. aerogenes Enterobacter spp. <span class="hlt">BMS</span>-180680 was the only antibiotic evaluated that was active against >90% of the Pseudomonas aeruginosa (MIC90, 0.25 microg/ml), Burkholderia cepacia, and Stenotrophomonas maltophilia (MIC90s, 1 microg/ml) strains tested. <span class="hlt">BMS</span>-180680 was inactive against most strains of Pseudomonas fluorescens, Pseudomonas stutzeri, Pseudomonas diminuta, and Burkholderia pickettii. <span class="hlt">BMS</span>-180680 was moderately active (MIC90s of 4 to 8 microg/ml) against Alcaligenes spp. and Acinetobacter lwoffii and less active (MIC90, 16 microg/ml) against Acinetobacter calcoaceticus-Acinetobacter baumanii complex. <span class="hlt">BMS</span>-180680 lacked activity against gram-positive bacteria and anaerobic bacteria. Both tonB and cir fiu double mutants of E. coli had greatly decreased susceptibility to <span class="hlt">BMS</span>-180680. Of the TEM, PSE, and chromosomal-encoded beta-lactamases tested, only the K1 enzyme hydrolyzed <span class="hlt">BMS</span>-180680 to any measurable extent. Like aztreonam, <span class="hlt">BMS</span>-180680 bound preferentially to penicillin-binding protein 3. The MICs of <span class="hlt">BMS</span>-180680 were not influenced by the presence of hematin or 5% sheep blood in the test medium or with incubation in an atmosphere containing 5% CO2. <span class="hlt">BMS</span>-180680 MICs obtained under strict anaerobic conditions were significantly higher than those obtained in ambient air</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.gpo.gov/fdsys/pkg/CFR-2010-title23-vol1/pdf/CFR-2010-title23-vol1-sec970-210.pdf','CFR'); return false;" href="https://www.gpo.gov/fdsys/pkg/CFR-2010-title23-vol1/pdf/CFR-2010-title23-vol1-sec970-210.pdf"><span>23 CFR 970.210 - Federal lands bridge management system (<span class="hlt">BMS</span>).</span></a></p> <p><a target="_blank" href="http://www.gpo.gov/fdsys/browse/collectionCfr.action?selectedYearFrom=2010&page.go=Go">Code of Federal Regulations, 2010 CFR</a></p> <p></p> <p>2010-04-01</p> <p>... 23 Highways 1 2010-04-01 2010-04-01 false Federal lands bridge management system (<span class="hlt">BMS</span>). 970.210... Federal lands bridge management system (<span class="hlt">BMS</span>). In addition to the requirements provided in § 970.204, the <span class="hlt">BMS</span> must meet the following requirements: (a) The NPS shall have a <span class="hlt">BMS</span> for the bridges which are under...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2011NRL.....6..290S','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2011NRL.....6..290S"><span>Solar light-driven photocatalytic hydrogen evolution over ZnIn2S4 loaded with transition-<span class="hlt">metal</span> <span class="hlt">sulfides</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Shen, Shaohua; Chen, Xiaobo; Ren, Feng; Kronawitter, Coleman X.; Mao, Samuel S.; Guo, Liejin</p> <p>2011-12-01</p> <p>A series of Pt-loaded MS/ZnIn2S4 (MS = transition-<span class="hlt">metal</span> <span class="hlt">sulfide</span>: Ag2S, SnS, CoS, CuS, NiS, and MnS) photocatalysts was investigated to show various photocatalytic activities depending on different transition-<span class="hlt">metal</span> <span class="hlt">sulfides</span>. Thereinto, CoS, NiS, or MnS-loading lowered down the photocatalytic activity of ZnIn2S4, while Ag2S, SnS, or CuS loading enhanced the photocatalytic activity. After loading 1.0 wt.% CuS together with 1.0 wt.% Pt on ZnIn2S4, the activity for H2 evolution was increased by up to 1.6 times, compared to the ZnIn2S4 only loaded with 1.0 wt.% Pt. Here, transition-<span class="hlt">metal</span> <span class="hlt">sulfides</span> such as CuS, together with Pt, acted as the dual co-catalysts for the improved photocatalytic performance. This study indicated that the application of transition-<span class="hlt">metal</span> <span class="hlt">sulfides</span> as effective co-catalysts opened up a new way to design and prepare high-efficiency and low-cost photocatalysts for solar-hydrogen conversion.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=163937','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=163937"><span>Identification of <span class="hlt">BMS</span>-200475 as a potent and selective inhibitor of hepatitis B virus.</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Innaimo, S F; Seifer, M; Bisacchi, G S; Standring, D N; Zahler, R; Colonno, R J</p> <p>1997-01-01</p> <p><span class="hlt">BMS</span>-200475 is a novel carbocyclic 2'-deoxyguanosine analog found to possess potent and selective anti-hepatitis B virus (anti-HBV) activity. <span class="hlt">BMS</span>-200475 is distinguished from guanosine by replacement of the natural furanose oxygen on the sugar moiety with an exo carbon-carbon double bond. In the HepG2 stably transfected cell line 2.2.15, <span class="hlt">BMS</span>-200475 had a 50% effective concentration (EC50) of 3.75 nM against HBV, as determined by analysis of secreted HBV DNA. Structurally related compounds with adenine, iodouracil, or thymine <span class="hlt">base</span> substitutions were significantly less potent or were inactive. Direct comparison of the antiviral activities of <span class="hlt">BMS</span>-200475 with those of a variety of other nucleoside analogs, including lamivudine (EC50 = 116.26 nM), demonstrated the clearly superior in vitro potency of <span class="hlt">BMS</span>-200475 in 2.2.15 cells. Intracellular HBV replicative intermediates were uniformly reduced when cells were treated with <span class="hlt">BMS</span>-200475, but rebounded after treatment was terminated. The concentration of <span class="hlt">BMS</span>-200475 causing 50% cytotoxicity in 2.2.15 cell cultures was 30 microM, approximately 8,000-fold greater than the concentration required to inhibit HBV replication in the same cell line. Treatment with <span class="hlt">BMS</span>-200475 resulted in no apparent inhibitory effects on mitochondrial DNA content. PMID:9210663</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2018CQGra..35g4003T','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2018CQGra..35g4003T"><span>The <span class="hlt">BMS</span>4 algebra at spatial infinity</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Troessaert, Cédric</p> <p>2018-04-01</p> <p>We show how a global <span class="hlt">BMS</span>4 algebra appears as part of the asymptotic symmetry algebra at spatial infinity. Using linearised theory, we then show that this global <span class="hlt">BMS</span>4 algebra is the one introduced by Strominger as a symmetry of the S-matrix.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/14529678','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/14529678"><span>Apoptotic pathways of epothilone <span class="hlt">BMS</span> 310705.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Uyar, Denise; Takigawa, Nagio; Mekhail, Tarek; Grabowski, Dale; Markman, Maurie; Lee, Francis; Canetta, Renzo; Peck, Ron; Bukowski, Ronald; Ganapathi, Ram</p> <p>2003-10-01</p> <p><span class="hlt">BMS</span> 310705 is a novel water-soluble analog of epothilone B currently in phase I clinical evaluation in the treatment of malignancies such as ovarian, renal, bladder, and lung carcinoma. Using an early passage cell culture model derived from the ascites of a patient clinically refractory to platinum/paclitaxel therapy, we evaluated the pathway of caspase-mediated apoptosis. Cells were treated for 1 h and subsequently evaluated for apoptosis, survival, and caspase activity. Apoptosis was determined by fluorescent microscopy. Caspase-3, -8, and -9 activities were determined by fluorometry using target tetrapeptide substrates. Mitochondrial release of cytochrome c was determined by immunoblot analysis. After treatment with <span class="hlt">BMS</span> 310705, apoptosis was confirmed in >25% of cells at 24 h. Survival was significantly lower (P < 0.02) in cells treated with 0.05 micro M <span class="hlt">BMS</span> 310705 vs paclitaxel. Analysis revealed an increase of caspase-9 and -3 activity; no caspase -8 activity was observed. Release of cytochrome c was detected at 12 h following treatment. SN-38 and topotecan failed to induce apoptosis. <span class="hlt">BMS</span> 310705 induces significant apoptosis, decreases survival, and utilizes the mitochondrial-mediated pathway for apoptosis in this model.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://pubs.er.usgs.gov/publication/70033420','USGSPUBS'); return false;" href="https://pubs.er.usgs.gov/publication/70033420"><span><span class="hlt">Sulfide</span> oxidation and distribution of <span class="hlt">metals</span> near abandoned copper mines in coastal environments, Prince William Sound, Alaska, USA</span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Koski, R.A.; Munk, L.; Foster, A.L.; Shanks, Wayne C.; Stillings, L.L.</p> <p>2008-01-01</p> <p>The oxidation of <span class="hlt">sulfide</span>-rich rocks, mostly leftover debris from Cu mining in the early 20th century, is contributing to <span class="hlt">metal</span> contamination of local coastal environments in Prince William Sound, Alaska. Analyses of <span class="hlt">sulfide</span>, water, sediment, precipitate and biological samples from the Beatson, Ellamar, and Threeman mine sites show that acidic surface waters generated from <span class="hlt">sulfide</span> weathering are pathways for redistribution of environmentally important elements into and beyond the intertidal zone at each site. Volcanogenic massive <span class="hlt">sulfide</span> deposits composed of pyrrhotite and (or) pyrite + chalcopyrite + sphalerite with subordinate galena, arsenopyrite, and cobaltite represent potent sources of Cu, Zn, Pb, As, Co, Cd, and Hg. The resistance to oxidation among the major <span class="hlt">sulfides</span> increases in the order pyrrhotite ??? sphalerite < chalcopyrite ??? pyrite; thus, pyrrhotite-rich rocks are typically more oxidized than those dominated by pyrite. The pervasive alteration of pyrrhotite begins with rim replacement by marcasite followed by replacement of the core by sulfur, Fe sulfate, and Fe-Al sulfate. The oxidation of chalcopyrite and pyrite involves an encroachment by colloform Fe oxyhydroxides at grain margins and along crosscutting cracks that gradually consumes the entire grain. The complete oxidation of <span class="hlt">sulfide</span>-rich samples results in a porous aggregate of goethite, lepidocrocite and amorphous Fe-oxyhydroxide enclosing hydrothermal and sedimentary silicates. An inverse correlation between pH and <span class="hlt">metal</span> concentrations is evident in water data from all three sites. Among all waters sampled, pore waters from Ellamar beach gravels have the lowest pH (???3) and highest concentrations of <span class="hlt">base</span> <span class="hlt">metals</span> (to ???25,000 ??g/L), which result from oxidation of abundant <span class="hlt">sulfide</span>-rich debris in the sediment. High levels of dissolved Hg (to 4100 ng/L) in the pore waters probably result from oxidation of sphalerite-rich rocks. The low-pH and high concentrations of dissolved Fe, Al, and SO4</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2017AGUFM.V14B..07B','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2017AGUFM.V14B..07B"><span>Na, Rb and Cs partitioning between <span class="hlt">metal</span>, silicate and <span class="hlt">sulfide</span>: Implications for volatile depletion in terrestrial planets</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Boujibar, A.; Fei, Y.; Du, Z.; Righter, K.; Bullock, E. S.</p> <p>2017-12-01</p> <p>Inner Solar System materials are known for their depletion in volatile elements, including the moderately volatile alkalis: Na, K, Rb, and Cs. The origin of this depletion is still uncertain, as several processes could have been involved, during the nebular condensation or planetary accretion. Volatile depletion is commonly estimated through comparison of alkali concentrations relatively to those of chondrites, assuming they remain in planetary mantles during core segregation. However, experimental studies show that substantial K can partition into <span class="hlt">metals</span> that are enriched in sulfur and oxygen. Several models have also suggested that <span class="hlt">sulfides</span> may have played an important role during episodes of <span class="hlt">sulfide</span> segregation from a crystallizing magma ocean (<span class="hlt">sulfide</span> matte) or accretion of S-rich planetary embryos. For Mercury, a <span class="hlt">sulfide</span> layer could be present between core and mantle, due to immiscibility between Si-rich and S-rich <span class="hlt">metals</span>. Therefore, here we investigate whether alkali elements (Na, Cs and Rb) could be partly sequestered in planetary cores during their differentiation. We conducted experiments at high pressure and temperature (1 to 5 GPa and up to 1900 °C) to determine partition coefficients of Na, Rb and Cs between <span class="hlt">metal</span> and silicate. Our results show that pressure, temperature, sulfur and oxygen in <span class="hlt">metals</span> enhance the partitioning of Na, Rb and Cs into <span class="hlt">metals</span>, as previously found for K. For all three investigated alkalis (Na, Rb and Cs), we found a maximum partition coefficient of 1 between <span class="hlt">sulfides</span> containing 13 wt% O and silicate melt. Therefore, S-rich cores or <span class="hlt">sulfide</span> layers formed due to immiscibility in Fe-S-O systems could have acted as important geochemical reservoirs for alkali elements. Using our experimental data and different assumptions on initial bulk abundances, we evaluate volatile depletion in terrestrial planets, by comparing resulting mantle alkali concentrations after core segregation, with actual concentrations in the Earth's mantle.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/16388288','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/16388288"><span>Burning mouth syndrome (<span class="hlt">BMS</span>): evaluation of thyroid and taste.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Femiano, F; Gombos, F; Esposito, V; Nunziata, M; Scully, Crispian</p> <p>2006-01-01</p> <p>Burning mouth syndrome (<span class="hlt">BMS</span>) is a chronic, intraoral burning sensation seen mainly in middle-aged and post-menopausal females, without identifiable oral lesions or abnormal laboratory findings, but often associated with psychogenic disorders such as depression. The latter can have a range of causes, including hormonal. Since there may be connections between <span class="hlt">BMS</span>, psychogenic changes, hormonal changes and taste abnormalities, we have examined aspects of taste and thyroid function. We selected 50 patients with <span class="hlt">BMS</span> (study group) and 50 healthy subjects (control group) and analysed their ability to taste bitter, acid and spicy substances and analysed their thyroid function and Undertook thyroid echography. Taste sensation was normal in all controls. However, 30 of the patients with <span class="hlt">BMS</span> reported ageusia for bitter taste and 2 had ageusia for acid. The use of pepper sauce (Tabasco) (spicy substance) produced a strong burning to the tongue in 28 patients of the <span class="hlt">BMS</span> group but only in 10 controls. No control patients showed abnormality of thyroid function or echograpic abnormality. Five patients in the <span class="hlt">BMS</span> group had biochemical evidence of hypothyroidism, 4 patients had raised levels of thyroid auto-antibodies and, of the 41 remaining <span class="hlt">BMS</span> patients, most (34) had thyroid echographic changes indicative of nodularity. Hypothyroidism may be responsible for a negative influence on taste and consequent increase in trigeminal sensorial sensation (tactile, thermal and painful sensation).</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3754311','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3754311"><span>Activity of the HIV-1 Attachment Inhibitor <span class="hlt">BMS</span>-626529, the Active Component of the Prodrug <span class="hlt">BMS</span>-663068, against CD4-Independent Viruses and HIV-1 Envelopes Resistant to Other Entry Inhibitors</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Li, Zhufang; Zhou, Nannan; Sun, Yongnian; Ray, Neelanjana; Lataillade, Max; Hanna, George J.</p> <p>2013-01-01</p> <p><span class="hlt">BMS</span>-626529 is a novel small-molecule HIV-1 attachment inhibitor active against both CCR5- and CXCR4-tropic viruses. <span class="hlt">BMS</span>-626529 functions by preventing gp120 from binding to CD4. A prodrug of this compound, <span class="hlt">BMS</span>-663068, is currently in clinical development. As a theoretical resistance pathway to <span class="hlt">BMS</span>-663068 could be the development of a CD4-independent phenotype, we examined the activity of <span class="hlt">BMS</span>-626529 against CD4-independent viruses and investigated whether resistance to <span class="hlt">BMS</span>-626529 could be associated with a CD4-independent phenotype. Finally, we evaluated whether cross-resistance exists between <span class="hlt">BMS</span>-626529 and other HIV-1 entry inhibitors. Two laboratory-derived envelopes with a CD4-independent phenotype (one CXCR4 tropic and one CCR5 tropic), five envelopes from clinical isolates with preexisting <span class="hlt">BMS</span>-626529 resistance, and several site-specific mutant <span class="hlt">BMS</span>-626529-resistant envelopes were examined for their dependence on CD4 for infectivity or susceptibility to <span class="hlt">BMS</span>-626529. Viruses resistant to other entry inhibitors (enfuvirtide, maraviroc, and ibalizumab) were also examined for susceptibility to <span class="hlt">BMS</span>-626529. Both CD4-independent laboratory isolates retained sensitivity to <span class="hlt">BMS</span>-626529 in CD4− cells, while HIV-1 envelopes from viruses resistant to <span class="hlt">BMS</span>-626529 exhibited no evidence of a CD4-independent phenotype. <span class="hlt">BMS</span>-626529 also exhibited inhibitory activity against ibalizumab- and enfuvirtide-resistant envelopes. While there appeared to be some association between maraviroc resistance and reduced susceptibility to <span class="hlt">BMS</span>-626529, an absolute correlation cannot be presumed, since some CCR5-tropic maraviroc-resistant envelopes remained sensitive to <span class="hlt">BMS</span>-626529. Clinical use of the prodrug <span class="hlt">BMS</span>-663068 is unlikely to promote resistance via generation of CD4-independent virus. No cross-resistance between <span class="hlt">BMS</span>-626529 and other HIV entry inhibitors was observed, which could allow for sequential or concurrent use with different classes of entry inhibitors. PMID:23774428</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://pubs.er.usgs.gov/publication/70036493','USGSPUBS'); return false;" href="https://pubs.er.usgs.gov/publication/70036493"><span>Mineralogic sources of <span class="hlt">metals</span> in leachates from the weathering of sedex, massive <span class="hlt">sulfide</span>, and vein deposit mining wastes</span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Diehl, S.F.; Hageman, P.L.; Seal, R.R.; Piatak, N.M.; Lowers, H.</p> <p>2011-01-01</p> <p>Weathered mine waste consists of oxidized primary minerals and chemically unstable secondary phases that can be sources of readily soluble <span class="hlt">metals</span> and acid rock drainage. Elevated concentrations of <span class="hlt">metals</span> such as Cd, Cu, Fe, Mn, Ni, Pb, and Zn are observed in deionized water-<span class="hlt">based</span> leachate solutions derived from complex sedex and Cu-Pb-Zn mine wastes. Leachate (USGS FLT) from the Elizabeth mine, a massive <span class="hlt">sulfide</span> deposit, has a pH of 3.4 and high concentrations of Al (16700 ug/L), Cu (440 ug/L), and Zn (8620 ug/L). Leachate from the sedex Faro mine has a pH of 3.5 and high concentrations of Al (2040 ug/L), Cu (1930 ug/L), Pb (2080 ug/L), and Zn (52900 ug/L). In contrast, higher-pH leachates produced from tailings of polymetallic vein deposits have order of magnitude lower <span class="hlt">metal</span> concentrations. These data indicate that highly soluble secondary mineral phases exist at the surface of waste material where the samples were collected. <span class="hlt">Sulfide</span> minerals from all sites exhibit differential degrees of weathering, from dissolution etched grain rims, to rinds of secondary minerals, to skeletal remnants. These microscale mineral-dissolution textures enhance weathering and <span class="hlt">metal</span> teachability of waste material. Besides the formation of secondary minerals, <span class="hlt">sulfide</span> grains from dried tailings samples may be coated by amorphous Fe-Al-Si minerals that also adsorb <span class="hlt">metals</span> such as Cu, Ni, and Zn.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://pubs.er.usgs.gov/publication/70035673','USGSPUBS'); return false;" href="https://pubs.er.usgs.gov/publication/70035673"><span>Fe-Ni <span class="hlt">metal</span> and <span class="hlt">sulfide</span> minerals in CM chondrites: An indicator for thermal history</span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Kimura, M.; Grossman, J.N.; Weisberg, M.K.</p> <p>2011-01-01</p> <p>CM chondrites were subjected to aqueous alteration and, in some cases, to secondary metamorphic heating. The effects of these processes vary widely, and have mainly been documented in silicate phases. Herein, we report the characteristic features of Fe-Ni <span class="hlt">metal</span> and <span class="hlt">sulfide</span> phases in 13 CM and 2 CM-related chondrites to explore the thermal history of these chondrites. The texture and compositional distribution of the <span class="hlt">metal</span> in CM are different from those in unequilibrated ordinary and CO chondrites, but most have similarities to those in highly primitive chondrites, such as CH, CR, and Acfer 094. We classified the CM samples into three categories <span class="hlt">based</span> on <span class="hlt">metal</span> composition and <span class="hlt">sulfide</span> texture. Fe-Ni <span class="hlt">metal</span> in category A is kamacite to martensite. Category B is characterized by pyrrhotite grains always containing blebs or lamellae of pentlandite. Opaque mineral assemblages of category C are typically kamacite, Ni-Co-rich <span class="hlt">metal</span>, and pyrrhotite. These categories are closely related to the degree of secondary heating and are not related to degree of the aqueous alteration. The characteristic features of the opaque minerals can be explained by secondary heating processes after aqueous alteration. Category A CM chondrites are unheated, whereas those in category B experienced small degrees of secondary heating. CMs in category C were subjected to the most severe secondary heating process. Thus, opaque minerals can provide constraints on the thermal history for CM chondrites. ?? The Meteoritical Society, 2011.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/19810010722','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/19810010722"><span>Infrared absorption spectra of <span class="hlt">metal</span> carbides, nitrides and <span class="hlt">sulfides</span></span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Kammori, O.; Sato, K.; Kurosawa, F.</p> <p>1981-01-01</p> <p>The infrared absorption spectra of 12 kinds of <span class="hlt">metal</span> carbides, 11 kinds of nitrides, and 7 kinds of <span class="hlt">sulfides</span>, a total of 30 materials, were measured and the application of the infrared spectra of these materials to analytical chemistry was discussed. The measurements were done in the frequency (wave length) range of (1400 to 400/cm (7 to 25 mu). The carbides Al4C3, B4C, the nitrides AlN, BN, Si3N4, WB, and the <span class="hlt">sulfides</span> Al2S3, FeS2, MnS, NiS and PbS were noted to have specific absorptions in the measured region. The sensitivity of Boron nitride was especially good and could be detected at 2 to 3 micrograms in 300 mg of potassium bromide.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2017PMM...118..113K','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2017PMM...118..113K"><span>Normal state of <span class="hlt">metallic</span> hydrogen <span class="hlt">sulfide</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Kudryashov, N. A.; Kutukov, A. A.; Mazur, E. A.</p> <p>2017-02-01</p> <p>A generalized theory of the normal properties of <span class="hlt">metals</span> in the case of electron-phonon (EP) systems with a nonconstant density of electron states has been used to study the normal state of the SH3 and SH2 phases of hydrogen <span class="hlt">sulfide</span> at different pressures. The frequency dependence of the real Re Σ (ω) and imaginary ImΣ (ω) parts of the self-energy Σ (ω) part (SEP) of the Green's function of the electron Σ (ω), real part Re Z (ω), and imaginary part Im Z (ω) of the complex renormalization of the mass of the electron; the real part Re χ (ω) and the imaginary part Imχ (ω) of the complex renormalization of the chemical potential; and the density of electron states N (ɛ) renormalized by strong electron-phonon interaction have been calculated. Calculations have been carried out for the stable orthorhombic structure (space group Im3¯ m) of the hydrogen <span class="hlt">sulfide</span> SH3 for three values of the pressure P = 170, 180, and 225 GPa; and for an SH2 structure with a symmetry of I4/ mmm ( D4 h1¯7) for three values of pressure P = 150, 180, and 225 GP at temperature T = 200 K.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.gpo.gov/fdsys/pkg/CFR-2011-title23-vol1/pdf/CFR-2011-title23-vol1-sec973-210.pdf','CFR2011'); return false;" href="https://www.gpo.gov/fdsys/pkg/CFR-2011-title23-vol1/pdf/CFR-2011-title23-vol1-sec973-210.pdf"><span>23 CFR 973.210 - Indian lands bridge management system (<span class="hlt">BMS</span>).</span></a></p> <p><a target="_blank" href="http://www.gpo.gov/fdsys/browse/collectionCfr.action?selectedYearFrom=2011&page.go=Go">Code of Federal Regulations, 2011 CFR</a></p> <p></p> <p>2011-04-01</p> <p>... Section 973.210 Highways FEDERAL HIGHWAY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION FEDERAL LANDS... framework for a <span class="hlt">BMS</span>: (1) A database and an ongoing program for the collection and maintenance of the inventory, inspection, cost, and supplemental data needed to support the <span class="hlt">BMS</span>. The minimum <span class="hlt">BMS</span> database shall...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.gpo.gov/fdsys/pkg/CFR-2012-title23-vol1/pdf/CFR-2012-title23-vol1-sec973-210.pdf','CFR2012'); return false;" href="https://www.gpo.gov/fdsys/pkg/CFR-2012-title23-vol1/pdf/CFR-2012-title23-vol1-sec973-210.pdf"><span>23 CFR 973.210 - Indian lands bridge management system (<span class="hlt">BMS</span>).</span></a></p> <p><a target="_blank" href="http://www.gpo.gov/fdsys/browse/collectionCfr.action?selectedYearFrom=2012&page.go=Go">Code of Federal Regulations, 2012 CFR</a></p> <p></p> <p>2012-04-01</p> <p>... Section 973.210 Highways FEDERAL HIGHWAY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION FEDERAL LANDS... framework for a <span class="hlt">BMS</span>: (1) A database and an ongoing program for the collection and maintenance of the inventory, inspection, cost, and supplemental data needed to support the <span class="hlt">BMS</span>. The minimum <span class="hlt">BMS</span> database shall...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.gpo.gov/fdsys/pkg/CFR-2014-title23-vol1/pdf/CFR-2014-title23-vol1-sec972-210.pdf','CFR2014'); return false;" href="https://www.gpo.gov/fdsys/pkg/CFR-2014-title23-vol1/pdf/CFR-2014-title23-vol1-sec972-210.pdf"><span>23 CFR 972.210 - Federal lands bridge management system (<span class="hlt">BMS</span>).</span></a></p> <p><a target="_blank" href="http://www.gpo.gov/fdsys/browse/collectionCfr.action?selectedYearFrom=2014&page.go=Go">Code of Federal Regulations, 2014 CFR</a></p> <p></p> <p>2014-04-01</p> <p>... Section 972.210 Highways FEDERAL HIGHWAY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION FEDERAL LANDS... framework for a <span class="hlt">BMS</span>: (1) A database and an ongoing program for the collection and maintenance of the inventory, inspection, cost, and supplemental data needed to support the <span class="hlt">BMS</span>. The minimum <span class="hlt">BMS</span> database shall...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.gpo.gov/fdsys/pkg/CFR-2011-title23-vol1/pdf/CFR-2011-title23-vol1-sec972-210.pdf','CFR2011'); return false;" href="https://www.gpo.gov/fdsys/pkg/CFR-2011-title23-vol1/pdf/CFR-2011-title23-vol1-sec972-210.pdf"><span>23 CFR 972.210 - Federal lands bridge management system (<span class="hlt">BMS</span>).</span></a></p> <p><a target="_blank" href="http://www.gpo.gov/fdsys/browse/collectionCfr.action?selectedYearFrom=2011&page.go=Go">Code of Federal Regulations, 2011 CFR</a></p> <p></p> <p>2011-04-01</p> <p>... Section 972.210 Highways FEDERAL HIGHWAY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION FEDERAL LANDS... framework for a <span class="hlt">BMS</span>: (1) A database and an ongoing program for the collection and maintenance of the inventory, inspection, cost, and supplemental data needed to support the <span class="hlt">BMS</span>. The minimum <span class="hlt">BMS</span> database shall...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.gpo.gov/fdsys/pkg/CFR-2012-title23-vol1/pdf/CFR-2012-title23-vol1-sec972-210.pdf','CFR2012'); return false;" href="https://www.gpo.gov/fdsys/pkg/CFR-2012-title23-vol1/pdf/CFR-2012-title23-vol1-sec972-210.pdf"><span>23 CFR 972.210 - Federal lands bridge management system (<span class="hlt">BMS</span>).</span></a></p> <p><a target="_blank" href="http://www.gpo.gov/fdsys/browse/collectionCfr.action?selectedYearFrom=2012&page.go=Go">Code of Federal Regulations, 2012 CFR</a></p> <p></p> <p>2012-04-01</p> <p>... Section 972.210 Highways FEDERAL HIGHWAY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION FEDERAL LANDS... framework for a <span class="hlt">BMS</span>: (1) A database and an ongoing program for the collection and maintenance of the inventory, inspection, cost, and supplemental data needed to support the <span class="hlt">BMS</span>. The minimum <span class="hlt">BMS</span> database shall...</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_2");'>2</a></li> <li><a href="#" onclick='return showDiv("page_3");'>3</a></li> <li class="active"><span>4</span></li> <li><a href="#" onclick='return showDiv("page_5");'>5</a></li> <li><a href="#" onclick='return showDiv("page_6");'>6</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_4 --> <div id="page_5" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_3");'>3</a></li> <li><a href="#" onclick='return showDiv("page_4");'>4</a></li> <li class="active"><span>5</span></li> <li><a href="#" onclick='return showDiv("page_6");'>6</a></li> <li><a href="#" onclick='return showDiv("page_7");'>7</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="81"> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.gpo.gov/fdsys/pkg/CFR-2013-title23-vol1/pdf/CFR-2013-title23-vol1-sec972-210.pdf','CFR2013'); return false;" href="https://www.gpo.gov/fdsys/pkg/CFR-2013-title23-vol1/pdf/CFR-2013-title23-vol1-sec972-210.pdf"><span>23 CFR 972.210 - Federal lands bridge management system (<span class="hlt">BMS</span>).</span></a></p> <p><a target="_blank" href="http://www.gpo.gov/fdsys/browse/collectionCfr.action?selectedYearFrom=2013&page.go=Go">Code of Federal Regulations, 2013 CFR</a></p> <p></p> <p>2013-04-01</p> <p>... Section 972.210 Highways FEDERAL HIGHWAY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION FEDERAL LANDS... framework for a <span class="hlt">BMS</span>: (1) A database and an ongoing program for the collection and maintenance of the inventory, inspection, cost, and supplemental data needed to support the <span class="hlt">BMS</span>. The minimum <span class="hlt">BMS</span> database shall...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/25007378','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/25007378"><span>Energy level alignment in TiO2/<span class="hlt">metal</span> <span class="hlt">sulfide</span>/polymer interfaces for solar cell applications.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Lindblad, Rebecka; Cappel, Ute B; O'Mahony, Flannan T F; Siegbahn, Hans; Johansson, Erik M J; Haque, Saif A; Rensmo, Håkan</p> <p>2014-08-28</p> <p>Semiconductor sensitized solar cell interfaces have been studied with photoelectron spectroscopy to understand the interfacial electronic structures. In particular, the experimental energy level alignment has been determined for complete TiO2/<span class="hlt">metal</span> <span class="hlt">sulfide</span>/polymer interfaces. For the <span class="hlt">metal</span> <span class="hlt">sulfides</span> CdS, Sb2S3 and Bi2S3 deposited from single source <span class="hlt">metal</span> xanthate precursors, it was shown that both driving forces for electron injection into TiO2 and hole transfer to the polymer decrease for narrower bandgaps. The energy level alignment results were used in the discussion of the function of solar cells with the same <span class="hlt">metal</span> <span class="hlt">sulfides</span> as light absorbers. For example Sb2S3 showed the most favourable energy level alignment with 0.3 eV driving force for electron injection and 0.4 eV driving force for hole transfer and also the most efficient solar cells due to high photocurrent generation. The energy level alignment of the TiO2/Bi2S3 interface on the other hand showed no driving force for electron injection to TiO2, and the performance of the corresponding solar cell was very low.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/19377384','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/19377384"><span>A multicenter, randomized study to test immunosuppressive therapy with oral prednisone for the prevention of restenosis after percutaneous coronary interventions: cortisone plus <span class="hlt">BMS</span> or DES versus <span class="hlt">BMS</span> alone to eliminate restenosis (CEREA-DES) - study design and rationale.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Ribichini, Flavio; Tomai, Fabrizio; De Luca, Giuseppe; Boccuzzi, Giacomo; Presbitero, Patrizia; Pesarini, Gabriele; Ferrero, Valeria; Ghini, Anna S; Pastori, Francesca; De Luca, Leonardo; Zavalloni, Denis; Soregaroli, Daniela; Garbo, Roberto; Franchi, Elena; Marino, Paolo; Minelli, Massimo; Vassanelli, Corrado</p> <p>2009-02-01</p> <p>Several randomized trials and registries have shown a reduction of restenosis after coronary angioplasty with drug-eluting stents (DESs) compared with bare <span class="hlt">metal</span> stents (BMSs). However, cost-efficacy analysis and long-term outcome of DESs compared to BMSs deserve further assessment. Moreover, concern has been raised regarding adverse clinical events occurring late after DES implantation, in particular, late stent thrombosis related to the suspension of dual antiplatelet therapy. The use of a short-cycle oral treatment with prednisone at immunosuppressive dose after <span class="hlt">BMS</span> implantation has shown remarkable efficacy in reducing restenosis in nondiabetic patients, with very low additional cost and without the need for long-term dual antiplatelet therapy. Such results are however limited by small sample size. Cortisone plus <span class="hlt">BMS</span> or DES versus <span class="hlt">BMS</span> alone to Eliminate Restenosis is an independent, prospective, multicenter, randomized study. It will randomize 375 nondiabetic patients with coronary artery disease in three different arms to <span class="hlt">BMS</span> (control group), DES (DES group) or <span class="hlt">BMS</span> followed by a 40-day prednisone treatment (prednisone group). The DES and the prednisone groups will be compared to the control group to investigate the expected clinical advantage. The primary endpoint of the study is the event-free survival of cardiovascular death, myocardial infarction and recurrence of ischemia-needing repeated target vessel revascularization at 1 year. Secondary endpoints are the event-free survival analysis at 2 and 3 years, the restenosis rate at 9 months, and cost-effectiveness at 1, 2 and 3 years. The expected primary endpoint rates are 90% for DESs and for prednisone-treated patients and 77% for BMSs. The study was designed as a superiority trial, to compare DES, and <span class="hlt">BMS</span> and prednisone, with <span class="hlt">BMS</span> alone. A sample size of 118 patients per group provides an 80% power, assuming a complete 12-month follow-up information available for each patient. To obviate for cases of drop</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/29275481','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/29275481"><span>Risk assessment of heavy <span class="hlt">metals</span> in Vembanad Lake sediments (south-west coast of India), <span class="hlt">based</span> on acid-volatile <span class="hlt">sulfide</span> (AVS)-simultaneously extracted <span class="hlt">metal</span> (SEM) approach.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Shyleshchandran, Mohanachandran Nair; Mohan, Mahesh; Ramasamy, Eswara Venkatesaperumal</p> <p>2018-03-01</p> <p>Contamination of estuarine system due to heavy <span class="hlt">metals</span> is a severe issue in tropical countries, especially in India. For the evaluation of the risk due to heavy <span class="hlt">metals</span>, the current study assessed spatial and temporal variation of acid-volatile <span class="hlt">sulfide</span> (AVS), simultaneously extracted <span class="hlt">metal</span> (SEM), and total <span class="hlt">metal</span> concentration as toxicity indicator of aquatic sediments in Vembanad Lake System (VLS), India. Surface sediment samples collected from 12 locations from the northern portion of VLS for 4 years during different seasons. The results suggest, in post-monsoon season, 91% of the sampling locations possessed high bioavailability of <span class="hlt">metals</span> and results in toxicity to aquatic biota. The average seasonal distribution of SEM during the period of observations was in the order post-monsoon > pre-monsoon > monsoon (1.76 ± 2.00 > 1.35 ± 0.60 > 0.80 ± 0.54 μmol/g). The concentration of individual <span class="hlt">metals</span> on ∑SEM are in the order SEM Zn > SEM Cu> SEM Cd ≈ SEM Pb > SEM Hg. Considering annual ΣSEM/AVS ratio, 83% of the sites cross the critical value of 'One,' reveals that active <span class="hlt">sulfide</span> phase of the sediment for fixing the <span class="hlt">metals</span> is saturated. The molar ratio (differences between SEM and AVS) and its normalized organic carbon ratio reveals that in the post-monsoon season, about 42% of the sites are in the category of adverse effects are possible. The study suggests the toxicity and mobility of the <span class="hlt">metals</span> largely depend on the available AVS, and the current situation may pose harm to benthic organisms.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.gpo.gov/fdsys/pkg/CFR-2014-title23-vol1/pdf/CFR-2014-title23-vol1-sec971-210.pdf','CFR2014'); return false;" href="https://www.gpo.gov/fdsys/pkg/CFR-2014-title23-vol1/pdf/CFR-2014-title23-vol1-sec971-210.pdf"><span>23 CFR 971.210 - Federal lands bridge management system (<span class="hlt">BMS</span>).</span></a></p> <p><a target="_blank" href="http://www.gpo.gov/fdsys/browse/collectionCfr.action?selectedYearFrom=2014&page.go=Go">Code of Federal Regulations, 2014 CFR</a></p> <p></p> <p>2014-04-01</p> <p>... vehicle classification (as appropriate); and (v) A history of conditions and actions taken on each bridge... 23 Highways 1 2014-04-01 2014-04-01 false Federal lands bridge management system (<span class="hlt">BMS</span>). 971.210... lands bridge management system (<span class="hlt">BMS</span>). In addition to the requirements provided in § 971.204, the <span class="hlt">BMS</span>...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.gpo.gov/fdsys/pkg/CFR-2013-title23-vol1/pdf/CFR-2013-title23-vol1-sec971-210.pdf','CFR2013'); return false;" href="https://www.gpo.gov/fdsys/pkg/CFR-2013-title23-vol1/pdf/CFR-2013-title23-vol1-sec971-210.pdf"><span>23 CFR 971.210 - Federal lands bridge management system (<span class="hlt">BMS</span>).</span></a></p> <p><a target="_blank" href="http://www.gpo.gov/fdsys/browse/collectionCfr.action?selectedYearFrom=2013&page.go=Go">Code of Federal Regulations, 2013 CFR</a></p> <p></p> <p>2013-04-01</p> <p>... vehicle classification (as appropriate); and (v) A history of conditions and actions taken on each bridge... 23 Highways 1 2013-04-01 2013-04-01 false Federal lands bridge management system (<span class="hlt">BMS</span>). 971.210... lands bridge management system (<span class="hlt">BMS</span>). In addition to the requirements provided in § 971.204, the <span class="hlt">BMS</span>...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.gpo.gov/fdsys/pkg/CFR-2012-title23-vol1/pdf/CFR-2012-title23-vol1-sec971-210.pdf','CFR2012'); return false;" href="https://www.gpo.gov/fdsys/pkg/CFR-2012-title23-vol1/pdf/CFR-2012-title23-vol1-sec971-210.pdf"><span>23 CFR 971.210 - Federal lands bridge management system (<span class="hlt">BMS</span>).</span></a></p> <p><a target="_blank" href="http://www.gpo.gov/fdsys/browse/collectionCfr.action?selectedYearFrom=2012&page.go=Go">Code of Federal Regulations, 2012 CFR</a></p> <p></p> <p>2012-04-01</p> <p>... Section 971.210 Highways FEDERAL HIGHWAY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION FEDERAL LANDS... components, as a minimum, as a basic framework for a <span class="hlt">BMS</span>: (1) A database and an ongoing program for the... <span class="hlt">BMS</span>. The minimum <span class="hlt">BMS</span> database shall include: (i) The inventory data required by the NBIS (23 CFR 650...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.gpo.gov/fdsys/pkg/CFR-2011-title23-vol1/pdf/CFR-2011-title23-vol1-sec971-210.pdf','CFR2011'); return false;" href="https://www.gpo.gov/fdsys/pkg/CFR-2011-title23-vol1/pdf/CFR-2011-title23-vol1-sec971-210.pdf"><span>23 CFR 971.210 - Federal lands bridge management system (<span class="hlt">BMS</span>).</span></a></p> <p><a target="_blank" href="http://www.gpo.gov/fdsys/browse/collectionCfr.action?selectedYearFrom=2011&page.go=Go">Code of Federal Regulations, 2011 CFR</a></p> <p></p> <p>2011-04-01</p> <p>... Section 971.210 Highways FEDERAL HIGHWAY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION FEDERAL LANDS... components, as a minimum, as a basic framework for a <span class="hlt">BMS</span>: (1) A database and an ongoing program for the... <span class="hlt">BMS</span>. The minimum <span class="hlt">BMS</span> database shall include: (i) The inventory data required by the NBIS (23 CFR 650...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://pubs.er.usgs.gov/publication/70020427','USGSPUBS'); return false;" href="https://pubs.er.usgs.gov/publication/70020427"><span>Predicting the toxicity of sediment-associated trace <span class="hlt">metals</span> with simultaneously extracted trace <span class="hlt">metal</span>: Acid-volatile <span class="hlt">sulfide</span> concentrations and dry weight-normalized concentrations: A critical comparison</span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Long, E.R.; MacDonald, D.D.; Cubbage, J.C.; Ingersoll, C.G.</p> <p>1998-01-01</p> <p>The relative abilities of sediment concentrations of simultaneously extracted trace <span class="hlt">metal</span>: acid-volatile <span class="hlt">sulfide</span> (SEM: AVS) and dry weight-normalized trace <span class="hlt">metals</span> to correctly predict both toxicity and nontoxicity were compared by analysis of 77 field-collected samples. Relative to the SEM:AVS concentrations, sediment guidelines <span class="hlt">based</span> upon dry weight-normalized concentrations were equally or slightly more accurate in predicting both nontoxic and toxic results in laboratory tests.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/biblio/1150868-geochemical-metagenomic-metaproteomic-insights-trace-metal-utilization-methane-oxidizing-microbial-consortia-sulfidic-marine-sediments','SCIGOV-STC'); return false;" href="https://www.osti.gov/biblio/1150868-geochemical-metagenomic-metaproteomic-insights-trace-metal-utilization-methane-oxidizing-microbial-consortia-sulfidic-marine-sediments"><span>Geochemical, metagenomic and metaproteomic insights into trace <span class="hlt">metal</span> utilization by methane-oxidizing microbial consortia in <span class="hlt">sulfidic</span> marine sediments</span></a></p> <p><a target="_blank" href="http://www.osti.gov/search">DOE Office of Scientific and Technical Information (OSTI.GOV)</a></p> <p>Glass, DR. Jennifer; Yu, DR. Hang; Steele, Joshua</p> <p></p> <p>Microbes have obligate requirements for trace <span class="hlt">metals</span> in metalloenzymes that catalyze important biogeochemical reactions. In anoxic methane- and <span class="hlt">sulfide</span>-rich environments, microbes may have unique adaptations for <span class="hlt">metal</span> acquisition and utilization due to decreased bioavailability as a result of <span class="hlt">metal</span> <span class="hlt">sulfide</span> precipitation. However, micronutrient cycling is largely unexplored in cold ( 10 C) and <span class="hlt">sulfidic</span> (>1 mM H2S) deep-sea methane seep ecosystems. We investigated trace <span class="hlt">metal</span> geochemistry and microbial <span class="hlt">metal</span> utilization in methane seeps offshore Oregon and California, USA, and report dissolved concentrations of nickel (0.5-270 nM), cobalt (0.5-6 nM), molybdenum (10-5,600 nM) and tungsten (0.3-8 nM) in Hydrate Ridge sedimentmore » porewaters. Despite low levels of cobalt and tungsten, metagenomic and metaproteomic data suggest that microbial consortia catalyzing anaerobic oxidation of methane utilize both scarce micronutrients in addition to nickel and molybdenum. Genetic machinery for cobalt-containing vitamin B12 biosynthesis was present in both anaerobic methanotrophic archaea (ANME) and sulfate-reducing bacteria (SRB). Proteins affiliated with the tungsten-containing form of formylmethanofuran dehydrogenase were expressed in ANME from two seep ecosystems, the first evidence for expression of a tungstoenzyme in psychrotolerant microorganisms. Finally, our data suggest that chemical speciation of <span class="hlt">metals</span> in highly <span class="hlt">sulfidic</span> porewaters may exert a stronger influence on microbial bioavailability than total concentration« less</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.gpo.gov/fdsys/pkg/CFR-2010-title23-vol1/pdf/CFR-2010-title23-vol1-sec973-210.pdf','CFR'); return false;" href="https://www.gpo.gov/fdsys/pkg/CFR-2010-title23-vol1/pdf/CFR-2010-title23-vol1-sec973-210.pdf"><span>23 CFR 973.210 - Indian lands bridge management system (<span class="hlt">BMS</span>).</span></a></p> <p><a target="_blank" href="http://www.gpo.gov/fdsys/browse/collectionCfr.action?selectedYearFrom=2010&page.go=Go">Code of Federal Regulations, 2010 CFR</a></p> <p></p> <p>2010-04-01</p> <p>... 23 Highways 1 2010-04-01 2010-04-01 false Indian lands bridge management system (<span class="hlt">BMS</span>). 973.210... PROGRAM Bureau of Indian Affairs Management Systems § 973.210 Indian lands bridge management system (<span class="hlt">BMS</span>...: (a) The BIA shall have a nationwide <span class="hlt">BMS</span> for the federally and tribally owned IRR bridges that are...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/27591804','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/27591804"><span>Influence of commercial (Fluka) naphthenic acids on acid volatile <span class="hlt">sulfide</span> (AVS) production and divalent <span class="hlt">metal</span> precipitation.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>McQueen, Andrew D; Kinley, Ciera M; Rodgers, John H; Friesen, Vanessa; Bergsveinson, Jordyn; Haakensen, Monique C</p> <p>2016-12-01</p> <p>Energy-derived waters containing naphthenic acids (NAs) are complex mixtures often comprising a suite of potentially problematic constituents (e.g. organics, <span class="hlt">metals</span>, and metalloids) that need treatment prior to beneficial use, including release to receiving aquatic systems. It has previously been suggested that NAs can have biostatic or biocidal properties that could inhibit microbially driven processes (e.g. dissimilatory sulfate reduction) used to transfer or transform <span class="hlt">metals</span> in passive treatment systems (i.e. constructed wetlands). The overall objective of this study was to measure the effects of a commercially available (Fluka) NA on sulfate-reducing bacteria (SRB), production of <span class="hlt">sulfides</span> (as acid-volatile <span class="hlt">sulfides</span> [AVS]), and precipitation of divalent <span class="hlt">metals</span> (i.e. Cu, Ni, Zn). These endpoints were assessed following 21-d aqueous exposures of NAs using bench-scale reactors. After 21-days, AVS molar concentrations were not statistically different (p<0.0001; α=0.05) among NA treatments (10, 20, 40, 60, and 80mg NA/L) and an untreated control (no NAs). Extent of AVS production was sufficient in all NA treatments to achieve ∑SEM:AVS <1, indicating that conditions were conducive for treatment of <span class="hlt">metals</span>, with <span class="hlt">sulfide</span> ligands in excess of SEM (Cu, Ni, and Zn). In addition, no adverse effects to SRB (in terms of density, relative abundance, and diversity) were measured following exposures of a commercial NA. In this bench-scale study, dissimilatory sulfate reduction and subsequent <span class="hlt">metal</span> precipitation were not vulnerable to NAs, indicating passive treatment systems utilizing <span class="hlt">sulfide</span> production (AVS) could be used to treat <span class="hlt">metals</span> occurring in NAs affected waters. Copyright © 2016 Elsevier Inc. All rights reserved.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2017MinDe..52.1127B','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2017MinDe..52.1127B"><span>Weathering of PGE <span class="hlt">sulfides</span> and Pt-Fe alloys in the Freetown Layered Complex, Sierra Leone</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Bowles, John F. W.; Suárez, Saioa; Prichard, Hazel M.; Fisher, Peter C.</p> <p>2017-12-01</p> <p>Fresh and weathered rocks and saprolite from Horizon B of the Freetown Layered Complex contain platinum-group minerals (PGM). The PGM in the fresh rocks are 1-7 μm across, including cooperite (PtS), isoferroplatinum (Pt3Fe), minor tetraferroplatinum (PtFe), tulameenite (Pt2FeCu), Os-bearing laurite (RuS2), and other <span class="hlt">base</span> <span class="hlt">metal-sulfide</span> (<span class="hlt">BMS</span>)-bearing PGM. The weathered rocks contain fewer of those PGM but a high proportion of disordered Cu-(±Pd)-bearing Pt-Fe alloys. The saprolite hosts scarce, smaller (1-3 μm) ordered PtFe and disordered PtFe3. The Pt-Fe alloys became increasingly Fe rich as weathering proceeded. Pt-Fe oxides appeared during weathering. Copper <span class="hlt">sulfides</span> associated with the primary PGM and cooperite (with <3% Pd) were destroyed to provide the minor Cu and Pd found in some of the disordered Pt-Fe alloys. Platinum- and Pd-bearing saprolites have retained the original rock fabric and, to a depth of about 2 m, surround residual rocks that show progressive weathering (corestones). Ground water passing through the saprolite has transported Pt and Pd (and probably Au) in solution down slope into saprolite over unmineralized rocks. Transport is marked by changes in the Pt/Pd ratio indicating that the <span class="hlt">metals</span> have moved independently. Palladium is present in marginally higher concentrations in the deeper saprolite than in the corestones suggesting some retention of Pd in the deeper saprolite. Platinum and Pd are less concentrated in the upper saprolite than the deeper saprolite indicating surface leaching. Alteration occurred over a long period in an organic and microbial rich environment that may have contributed to the leaching and transport of PGE.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=64536&keyword=avs&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50','EPA-EIMS'); return false;" href="https://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=64536&keyword=avs&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50"><span>BIOLOGICAL RESPONSE TO VARIATION OF ACID-VOLATILE <span class="hlt">SULFIDES</span> AND <span class="hlt">METALS</span> IN FIELD-EXPOSED SPIKED SEDIMENTS</span></a></p> <p><a target="_blank" href="http://oaspub.epa.gov/eims/query.page">EPA Science Inventory</a></p> <p></p> <p></p> <p>Vertical and temporal variations of acid-volatile <span class="hlt">sulfides</span> (AVS) and simultaneously extracted <span class="hlt">metals</span> (SEM) in sediment can control biological impacts of <span class="hlt">metals</span>. To assess the significance of these variations in field sediments, sediments spiked with cadmium, copper, lead, nickel ...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://pubs.er.usgs.gov/publication/70193459','USGSPUBS'); return false;" href="https://pubs.er.usgs.gov/publication/70193459"><span>Quality control considerations for the determination of acid-volatile <span class="hlt">sulfide</span> and simultaneously extracted <span class="hlt">metals</span> in sediments</span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Brumbaugh, William G.; Arms, Jesse W.</p> <p>1996-01-01</p> <p>The determination of acid-volatile <span class="hlt">sulfide</span> (AVS) and simultaneously extracted <span class="hlt">metals</span> (SEMs) in sediment by treatment with dilute HCl shows promise as a tool for predicting the potential for <span class="hlt">metal</span> toxicity to sediment-dwelling organisms. Effective quality control measures must be developed if this method is to become a reliable procedure and to ensure comparability of data. However, establishing quality control measures that assess procedural errors for an operationally defined method can be problematic. For example, preextraction spikes added for assessing the accuracy of AVS and SEMs may be poorly recovered due to adsorption or reaction with sediment constituents. For a variety of sediment types, we found preextraction spikes of <span class="hlt">sulfide</span>, mercury, and copper to be prone to variable recoveries for the AVS/SEM procedure; recoveries averaged 76.3% (SD, 20.9) for <span class="hlt">sulfide</span>, 61.9% (39.6) for Hg, and 90.1% (12.7) for Cu. The average recovery was near 100% for preextraction spikes of sediments for Cd, Ni, Pb, and Zn, and the recoveries of preextraction blank spikes for all analytes were consistently 95 to 105%. Binding of Cu or Hg with <span class="hlt">sulfides</span> is sufficiently strong that 1 N hydrochloric acid will not necessarily keep the spiked <span class="hlt">metal</span> in the dissolved state. This does not mean that the SEM procedure is invalid for these <span class="hlt">metals</span>, only that the quality control of procedural error is difficult to assess. However, Hg will generally not be detected when measured as an SEM because of its tendency to adsorb onto <span class="hlt">sulfide</span> minerals even at extremely low pH. Some reference sediments may be useful for assessing consistency of AVS determinations; we measured 5.97 ± 0.65 μmol/g in National Institute of Standards and Technology (NIST) 1645 and 1.34 ± 0.14 μmol/g in NIST 2704 for repeated determinations conducted over the past 3 years. Apparently, some sediments may contain an oxidation-resistant <span class="hlt">sulfide</span> component that can release low to moderate AVS when treated with dilute HCl.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/23492671','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/23492671"><span>Long-term clinical follow-up of the multicentre, randomized study to test immunosuppressive therapy with oral prednisone for the prevention of restenosis after percutaneous coronary interventions: Cortisone plus <span class="hlt">BMS</span> or DES veRsus <span class="hlt">BMS</span> alone to EliminAte Restenosis (CEREA-DES).</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Ribichini, Flavio; Tomai, Fabrizio; Pesarini, Gabriele; Zivelonghi, Carlo; Rognoni, Andrea; De Luca, Giuseppe; Boccuzzi, Giacomo; Presbitero, Patrizia; Ferrero, Valeria; Ghini, Anna S; Marino, Paolo; Vassanelli, Corrado</p> <p>2013-06-01</p> <p>To analyse the clinical outcome at 4 years in patients with coronary artery disease treated with bare <span class="hlt">metal</span> stents (<span class="hlt">BMS</span>) vs. <span class="hlt">BMS</span> and oral prednisone, or drug-eluting stents (DES), all assuming similar adjunctive medical treatment. Five Italian hospitals enrolled 375 non-diabetic, ischaemic patients without contraindications to dual anti-platelet treatment or corticosteroid therapy in a randomized controlled study. The primary endpoint was the event-free survival of cardiovascular death, myocardial infarction, and recurrence of ischaemia needing repeated target vessel revascularization at 1 year, and this was significantly lower in the <span class="hlt">BMS</span> group (80.8%) compared with the prednisone (88.0%) and DES group (88.8%, P = 0.04 and 0.006, respectively). The long-term analysis of the primary endpoint was a pre-specified aim of the trial, and was performed at 1447 days (median, IQ range = 1210-1641). Patients receiving <span class="hlt">BMS</span> alone had significantly lower event-free survival (75.3%) compared with 84.1% in the prednisone group (HR: 0.447; 95% CI: 0.25-0.80, P = 0.007) and 80.6% in DES patients (HR: 0.519; 95% CI: 0.29-0.93, P = 0.03). Prednisone-treated patients did not develop new treatment-related clinical problems. Drug-eluting stents patients suffered more very late stent thrombosis as a cause of spontaneous myocardial infarction. The need for target vessel revascularization remained lower in the prednisone and DES groups (13.6 and 15.2%, respectively), compared with <span class="hlt">BMS</span> (23.2%). The clinical benefits of prednisone compared with <span class="hlt">BMS</span> only persisted almost unchanged at 4 years. Drug-eluting stents performed better than <span class="hlt">BMS</span> at long-term, although the advantages observed at 1 year were in part attenuated because of the occurrence of very late stent thrombosis and late revascularizations. Clinical Trial NCT 00369356.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2016IJMMM..23.1377L','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2016IJMMM..23.1377L"><span>Comprehensive recovery of gold and <span class="hlt">base-metal</span> <span class="hlt">sulfide</span> minerals from a low-grade refractory ore</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Li, Wen-juan; Liu, Shuang; Song, Yong-sheng; Wen, Jian-kang; Zhou, Gui-ying; Chen, Yong</p> <p>2016-12-01</p> <p>The comprehensive recovery of small amounts of valuable minerals such as gold and <span class="hlt">base-metal</span> <span class="hlt">sulfide</span> minerals from a low-grade refractory ore was investigated. The following treatment strategy was applied to a sample of this ore: gold flotation-gold concentrate leaching-lead and zinc flotation from the gold concentrate leaching residue. Closed-circuit trials of gold flotation yielded a gold concentrate that assayed at 40.23 g·t-1 Au with a recovery of 86.25%. The gold concentrate leaching rate was 98.76%. Two variants of lead-zinc flotation from the residue—preferential flotation of lead and zinc and bulk flotation of lead and zinc—were tested using the middling processing method. Foam from the reflotation was returned to the lead rougher flotation or lead-zinc bulk flotation, whereas middlings from reflotation were discarded. Sulfur concentrate was a byproduct. The combined strategy of flotation, leaching, and flotation is recommended for the treatment of this kind of ore.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2016MMTB...47..127Z','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2016MMTB...47..127Z"><span>Analysis on the Oversize Blast Furnace Desulfurization and a <span class="hlt">Sulfide</span> Capacity Prediction Model <span class="hlt">Based</span> on Congregated Electron Phase</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Zhenyang, Wang; Jianliang, Zhang; Gang, An; Zhengjian, Liu; Zhengming, Cheng; Junjie, Huang; Jingwei, Zhang</p> <p>2016-02-01</p> <p>Through analyzed and regressed the actual productive desulfurization data from the oversize blast furnace (5500 m3) in north China, the relationship between the sulfur distribution parameters and the slag composition in actual production situation was investigated. As the slag and hot <span class="hlt">metal</span> phases have their own balance sulfur content or sulfur partial pressure in gas phase, respectively, the non-equilibrium of sulfur among gas, slag, and <span class="hlt">metal</span> phases leads to the transmission and distribution of sulfur. Combined with sulfur transmission reactions between gas, slag and <span class="hlt">metal</span> phases, C/CO pairs equilibrium, and Wagner model, the measured <span class="hlt">sulfide</span> capacity can be acquired using sulfur distribution ratio, sulfur activity coefficient, and oxygen activity in hot <span class="hlt">metal</span>. <span class="hlt">Based</span> on the theory of congregated electron phase, a new <span class="hlt">sulfide</span> capacity prediction model (CEPM) has been developed, which has a good liner relationship with the measured <span class="hlt">sulfide</span> capacity. Thus, using the burden structure for BF, the ironmaking slag composition can be obtained simply and can be used to reliably predict the ironmaking slag desulfurization ability a few hours later after charging under a certain temperature by CEPM.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.dtic.mil/docs/citations/ADA513188','DTIC-ST'); return false;" href="http://www.dtic.mil/docs/citations/ADA513188"><span>Anaerobic Biostimulation for the In Situ Precipitation and Long-Term Sequestration of <span class="hlt">Metal</span> <span class="hlt">Sulfides</span></span></a></p> <p><a target="_blank" href="http://www.dtic.mil/">DTIC Science & Technology</a></p> <p></p> <p>2009-04-01</p> <p>remediation is critically needed. The five most frequently cited <span class="hlt">metals</span> in the Williford report were arsenic, lead, cadmium, chromium and mercury . Of these...arsenic, lead, cadmium and mercury have been shown to precipitate as stable <span class="hlt">metal</span> <span class="hlt">sulfides</span> under highly reducing conditions. The recently...potential applications to bioprecipitation of toxic <span class="hlt">metals</span> as sulphides . J. of Industrial Microbiology 17: 116-123. Williford, W.W., R.M. Bricka, S.L</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4123935','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4123935"><span>Chemically Reversible Reactions of Hydrogen <span class="hlt">Sulfide</span> with <span class="hlt">Metal</span> Phthalocyanines</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p></p> <p>2015-01-01</p> <p>Hydrogen <span class="hlt">sulfide</span> (H2S) is an important signaling molecule that exerts action on various bioinorganic targets. Despite this importance, few studies have investigated the differential reactivity of the physiologically relevant H2S and HS– protonation states with <span class="hlt">metal</span> complexes. Here we report the distinct reactivity of H2S and HS– with zinc(II) and cobalt(II) phthalocyanine (Pc) complexes and highlight the chemical reversibility and cyclability of each <span class="hlt">metal</span>. ZnPc reacts with HS–, but not H2S, to generate [ZnPc-SH]−, which can be converted back to ZnPc by protonation. CoPc reacts with HS–, but not H2S, to form [CoIPc]−, which can be reoxidized to CoPc by air. Taken together, these results demonstrate the chemically reversible reaction of HS– with <span class="hlt">metal</span> phthalocyanine complexes and highlight the importance of H2S protonation state in understanding the reactivity profile of H2S with biologically relevant <span class="hlt">metal</span> scaffolds. PMID:24785654</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_3");'>3</a></li> <li><a href="#" onclick='return showDiv("page_4");'>4</a></li> <li class="active"><span>5</span></li> <li><a href="#" onclick='return showDiv("page_6");'>6</a></li> <li><a href="#" onclick='return showDiv("page_7");'>7</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_5 --> <div id="page_6" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_4");'>4</a></li> <li><a href="#" onclick='return showDiv("page_5");'>5</a></li> <li class="active"><span>6</span></li> <li><a href="#" onclick='return showDiv("page_7");'>7</a></li> <li><a href="#" onclick='return showDiv("page_8");'>8</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="101"> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3750252','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3750252"><span>Aerobic transformation of cadmium through <span class="hlt">metal</span> <span class="hlt">sulfide</span> biosynthesis in photosynthetic microorganisms</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p></p> <p>2013-01-01</p> <p>Background Cadmium is a non-essential <span class="hlt">metal</span> that is toxic because of its interference with essential <span class="hlt">metals</span> such as iron, calcium and zinc causing numerous detrimental metabolic and cellular effects. The amount of this <span class="hlt">metal</span> in the environment has increased dramatically since the advent of the industrial age as a result of mining activities, the use of fertilizers and sewage sludge in farming, and discharges from manufacturing activities. The <span class="hlt">metal</span> bioremediation utility of phototrophic microbes has been demonstrated through their ability to detoxify Hg(II) into HgS under aerobic conditions. <span class="hlt">Metal</span> <span class="hlt">sulfides</span> are generally very insoluble and therefore, biologically unavailable. Results When Cd(II) was exposed to cells it was bioconverted into CdS by the green alga Chlamydomonas reinhardtii, the red alga Cyanidioschyzon merolae, and the cyanobacterium, Synechoccocus leopoliensis. Supplementation of the two eukaryotic algae with extra sulfate, but not sulfite or cysteine, increased their cadmium tolerances as well as their abilities to produce CdS, indicating an involvement of sulfate assimilation in the detoxification process. However, the combined activities of extracted serine acetyl-transferase (SAT) and O-acetylserine(thiol)lyase (OASTL) used to monitor sulfate assimilation, was not significantly elevated during cell treatments that favored <span class="hlt">sulfide</span> biosynthesis. It is possible that the prolonged incubation of the experiments occurring over two days could have compensated for the low rates of sulfate assimilation. This was also the case for S. leopoliensis where sulfite and cysteine as well as sulfate supplementation enhanced CdS synthesis. In general, conditions that increased cadmium <span class="hlt">sulfide</span> production also resulted in elevated cysteine desulfhydrase activities, strongly suggesting that cysteine is the direct source of sulfur for CdS synthesis. Conclusions Cadmium(II) tolerance and CdS formation were significantly enhanced by sulfate supplementation, thus</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/27827402','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/27827402"><span>Clean thermal decomposition of tertiary-alkyl <span class="hlt">metal</span> thiolates to <span class="hlt">metal</span> <span class="hlt">sulfides</span>: environmentally-benign, non-polar inks for solution-processed chalcopyrite solar cells.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Heo, Jungwoo; Kim, Gi-Hwan; Jeong, Jaeki; Yoon, Yung Jin; Seo, Jung Hwa; Walker, Bright; Kim, Jin Young</p> <p>2016-11-09</p> <p>We report the preparation of Cu 2 S, In 2 S 3 , CuInS 2 and Cu(In,Ga)S 2 semiconducting films via the spin coating and annealing of soluble tertiary-alkyl thiolate complexes. The thiolate compounds are readily prepared via the reaction of <span class="hlt">metal</span> <span class="hlt">bases</span> and tertiary-alkyl thiols. The thiolate complexes are soluble in common organic solvents and can be solution processed by spin coating to yield thin films. Upon thermal annealing in the range of 200-400 °C, the tertiary-alkyl thiolates decompose cleanly to yield volatile dialkyl <span class="hlt">sulfides</span> and <span class="hlt">metal</span> <span class="hlt">sulfide</span> films which are free of organic residue. Analysis of the reaction byproducts strongly suggests that the decomposition proceeds via an SN 1 mechanism. The composition of the films can be controlled by adjusting the amount of each <span class="hlt">metal</span> thiolate used in the precursor solution yielding bandgaps in the range of 1.2 to 3.3 eV. The films form functioning p-n junctions when deposited in contact with CdS films prepared by the same method. Functioning solar cells are observed when such p-n junctions are prepared on transparent conducting substrates and finished by depositing electrodes with appropriate work functions. This method enables the fabrication of <span class="hlt">metal</span> chalcogenide films on a large scale via a simple and chemically clear process.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2016NatSR...636608H','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2016NatSR...636608H"><span>Clean thermal decomposition of tertiary-alkyl <span class="hlt">metal</span> thiolates to <span class="hlt">metal</span> <span class="hlt">sulfides</span>: environmentally-benign, non-polar inks for solution-processed chalcopyrite solar cells</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Heo, Jungwoo; Kim, Gi-Hwan; Jeong, Jaeki; Yoon, Yung Jin; Seo, Jung Hwa; Walker, Bright; Kim, Jin Young</p> <p>2016-11-01</p> <p>We report the preparation of Cu2S, In2S3, CuInS2 and Cu(In,Ga)S2 semiconducting films via the spin coating and annealing of soluble tertiary-alkyl thiolate complexes. The thiolate compounds are readily prepared via the reaction of <span class="hlt">metal</span> <span class="hlt">bases</span> and tertiary-alkyl thiols. The thiolate complexes are soluble in common organic solvents and can be solution processed by spin coating to yield thin films. Upon thermal annealing in the range of 200-400 °C, the tertiary-alkyl thiolates decompose cleanly to yield volatile dialkyl <span class="hlt">sulfides</span> and <span class="hlt">metal</span> <span class="hlt">sulfide</span> films which are free of organic residue. Analysis of the reaction byproducts strongly suggests that the decomposition proceeds via an SN1 mechanism. The composition of the films can be controlled by adjusting the amount of each <span class="hlt">metal</span> thiolate used in the precursor solution yielding bandgaps in the range of 1.2 to 3.3 eV. The films form functioning p-n junctions when deposited in contact with CdS films prepared by the same method. Functioning solar cells are observed when such p-n junctions are prepared on transparent conducting substrates and finished by depositing electrodes with appropriate work functions. This method enables the fabrication of <span class="hlt">metal</span> chalcogenide films on a large scale via a simple and chemically clear process.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2017JHEP...10..049P','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2017JHEP...10..049P"><span>Near-horizon <span class="hlt">BMS</span> symmetries as fluid symmetries</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Penna, Robert F.</p> <p>2017-10-01</p> <p>The Bondi-van der Burg-Metzner-Sachs (<span class="hlt">BMS</span>) group is the asymptotic symmetry group of asymptotically flat gravity. Recently, Donnay et al. have derived an analogous symmetry group acting on black hole event horizons. For a certain choice of boundary conditions, it is a semidirect product of Diff( S 2), the smooth diffeomorphisms of the twosphere, acting on C ∞( S 2), the smooth functions on the two-sphere. We observe that the same group appears in fluid dynamics as symmetries of the compressible Euler equations. We relate these two realizations of Diff( S 2) ⋉ C ∞( S 2) using the black hole membrane paradigm. We show that the Lie-Poisson brackets of membrane paradigm fluid charges reproduce the near-horizon <span class="hlt">BMS</span> algebra. The perspective presented here may be useful for understanding the <span class="hlt">BMS</span> algebra at null infinity.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/9219690','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/9219690"><span>Experimental simulations of <span class="hlt">sulfide</span> formation in the solar nebula.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Lauretta, D S; Lodders, K; Fegley, B</p> <p>1997-07-18</p> <p>Sulfurization of meteoritic <span class="hlt">metal</span> in H2S-H2 gas produced three different <span class="hlt">sulfides</span>: monosulfide solid solution [(Fe,Ni)1-xS], pentlandite [(Fe,Ni)9-xS8], and a phosphorus-rich <span class="hlt">sulfide</span>. The composition of the remnant <span class="hlt">metal</span> was unchanged. These results are contrary to theoretical predictions that <span class="hlt">sulfide</span> formation in the solar nebula produced troilite (FeS) and enriched the remaining <span class="hlt">metal</span> in nickel. The experimental <span class="hlt">sulfides</span> are chemically and morphologically similar to <span class="hlt">sulfide</span> grains in the matrix of the Alais (class CI) carbonaceous chondrite, suggesting that these meteoritic <span class="hlt">sulfides</span> may be condensates from the solar nebula.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/15054535','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/15054535"><span>Heavy <span class="hlt">metal</span> speciation in solid-phase materials from a bacterial sulfate reducing bioreactor using sequential extraction procedure combined with acid volatile <span class="hlt">sulfide</span> analysis.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Jong, Tony; Parry, David L</p> <p>2004-04-01</p> <p>Heavy <span class="hlt">metal</span> mobility, bioavailability and toxicity depends largely on the chemical form of <span class="hlt">metals</span> and ultimately determines potential for environmental pollution. For this reason, determining the chemical form of heavy <span class="hlt">metals</span> and metalloids, immobilized in sludges by biological mediated sulfate reduction, is important to evaluate their mobility and bioavailability. A modified Tessier sequential extraction procedure (SEP), complemented with acid volatile <span class="hlt">sulfide</span> (AVS) and simultaneous extracted <span class="hlt">metals</span> (SEM) measurements, were applied to determine the partitioning of five heavy <span class="hlt">metals</span> (defined as Fe, Ni, Zn and Cu, and the metalloid As) in anoxic solid-phase material (ASM) from an anaerobic, sulfate reducing bioreactor into six operationally defined fractions. These fractions were water soluble, exchangeable, bound to carbonates (acid soluble), bound to Fe-Mn oxides (reducible), bound to organic matter and <span class="hlt">sulfides</span> (oxidizable) and residual. It was found that the distribution of Fe, Ni, Zn, Cu and As in ASM was strongly influenced by its association with the above solid fractions. The fraction corresponding to organic matter and <span class="hlt">sulfides</span> appeared to be the most important scavenging phases of As, Fe, Ni, Zn and Cu in ASM (59.8-86.7%). This result was supported by AVS and SEM (Sigma Zn, Ni and Cu) measurements, which indicated that the heavy <span class="hlt">metals</span> existed overwhelmingly as <span class="hlt">sulfides</span> in the organic matter and <span class="hlt">sulfide</span> fraction. A substantial amount of Fe and Ni at 16.4 and 20.1%, respectively, were also present in the carbonate fraction, while an appreciable portion of As (18.3%) and Zn (19.4%) was bound to Fe-Mn oxides. A significant amount of heavy <span class="hlt">metals</span> was also associated with the residual fraction, ranging from 2.1% for Zn to 18.8% for As. <span class="hlt">Based</span> on the average total extractable heavy <span class="hlt">metal</span> (TEHM) values, the concentration of heavy <span class="hlt">metals</span> in the ASM was in the order of Cu > Ni > Zn > Fe > As. If the mobility and bioavailability of heavy <span class="hlt">metals</span> are assumed to be</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/pages/biblio/1436642-insights-solar-nebula-formation-pyrrhotite-from-nanoscale-disequilibrium-phases-produced-h2s-sulfidation-fe-metal','SCIGOV-DOEP'); return false;" href="https://www.osti.gov/pages/biblio/1436642-insights-solar-nebula-formation-pyrrhotite-from-nanoscale-disequilibrium-phases-produced-h2s-sulfidation-fe-metal"><span>Insights into solar nebula formation of pyrrhotite from nanoscale disequilibrium phases produced by H2S <span class="hlt">sulfidation</span> of Fe <span class="hlt">metal</span></span></a></p> <p><a target="_blank" href="http://www.osti.gov/pages">DOE PAGES</a></p> <p>Gainsforth, Z; Lauretta, DS; Tamura, N; ...</p> <p>2017-09-01</p> <p>© 2017 by Walter de Gruyter Berlin/Boston. Lauretta (2005) produced <span class="hlt">sulfide</span> in the laboratory by exposing canonical nebular <span class="hlt">metal</span> analogs to H 2 S gas under temperatures and pressures relevant to the formation of the Solar System. The resulting reactions produced a suite of <span class="hlt">sulfides</span> and nanophase materials not visible at the microprobe scale, but which we have now analyzed by TEM for comparison with interplanetary dust samples and comet Wild 2 samples returned by the Stardust mission. We find the unexpected result that disequilibrium formation favors pyrrhotite over troilite and also produces minority schreibersite, daubréelite, barringerite, taenite, oldhamite, andmore » perryite at the <span class="hlt">metal-sulfide</span> interface. TEM identification of nanophases and analysis of pyrrhotite superlattice reflections illuminate the formation pathway of disequilibrium <span class="hlt">sulfide</span>. We discuss the conditions under which such disequilibrium can occur, and implications for formation of <span class="hlt">sulfide</span> found in extraterrestrial materials.« less</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2017M%26PS...52.2424L','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2017M%26PS...52.2424L"><span>Porous, S-bearing silica in <span class="hlt">metal-sulfide</span> nodules and in the interchondrule clastic matrix in two EH3 chondrites</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Lehner, S. W.; Németh, P.; Petaev, M. I.; Buseck, P. R.</p> <p>2017-11-01</p> <p>Two new occurrences of porous, S-bearing, amorphous silica are described within <span class="hlt">metal-sulfide</span> nodules (MSN) and as interchondrule patches in EH3 chondrites SAH 97072 and ALH 84170. This porous amorphous material, which was first reported from <span class="hlt">sulfide</span>-bearing chondrules, consists of sinewy SiO2-rich areas containing S with minor Na or Ca as well as Fe, Mg, and Al. Some pores contain minerals including pyrite, pyrrhotite, and anhydrite. Most pores appear vacant or contain unidentified material that is unstable under analytical conditions. Niningerite, olivine, enstatite, albite, and kumdykolite occur enclosed within porous silica patches. Porous silica is commonly interfingered with cristobalite suggesting its amorphous structure resulted from high-temperature quenching. We interpret the S-bearing porous silica to be a product of silicate <span class="hlt">sulfidation</span>, and the Na, Ca, Fe, Mg, and Al detectable within this material are chemical residues of <span class="hlt">sulfidized</span> silicates and <span class="hlt">metal</span>. The occurrence of porous silica in the cores of MSN, which are considered to be pre-accretionary objects, suggests the <span class="hlt">sulfidizing</span> conditions occurred prior to final parent-body solidification. Ubiquitous S-bearing porous silica among <span class="hlt">sulfide</span>-bearing chondrules, MSN, and in the interchondrule clastic matrix, suggests that similar <span class="hlt">sulfidizing</span> conditions affected all the constituents of these EH3 chondrites.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/19027057','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/19027057"><span>Pulmonary delivery of a GLP-1 receptor agonist, <span class="hlt">BMS</span>-686117.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Qian, Feng; Mathias, Neil; Moench, Paul; Chi, Cecilia; Desikan, Sridhar; Hussain, Munir; Smith, Ronald L</p> <p>2009-01-21</p> <p>Alternate delivery route of therapeutic peptides is an attractive non-invasive option to patients who must chronically self-administer their medication through injections. In recent years, much attention has centered on pulmonary peptide delivery of peptide drugs such as insulin and GLP-1 mimetic peptides in the treatment of type II diabetes. In this study, we assessed the feasibility of delivering <span class="hlt">BMS</span>-686117, an 11-mer GLP-1 receptor peptide agonist, to the lung in rats via intratracheal administration. The pharmacokinetic profiles of three spray-dried, prototype inhaled powder formulations, 80/20 <span class="hlt">BMS</span>-686117/trehalose (I), 100% <span class="hlt">BMS</span>-686117 (II), and 20/80 <span class="hlt">BMS</span>-686117/mannitol (III), as well as a lyophilized <span class="hlt">BMS</span>-686117 powder, were compared with intravenously and subcutaneously administered peptide. The spray-dried formulations were mostly spherical particles with narrow particle size distribution between 2 to 10 microm, which are better suited for inhalation delivery than the lyophilized, irregular shape powder with a wide particle size distribution between 2 to 100 microm. Prototype III exhibited the best physical characteristics and in vivo performance, with bioavailability of 45% relative to subcutaneous administration. The T(max) for lung delivered peptide formulations were almost twice as fast as subcutaneous injection, suggesting potential for rapid absorption and onset of action. This study demonstrated that pulmonary delivery is a promising, non-invasive route for the administration of <span class="hlt">BMS</span>-686117.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/15926671','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/15926671"><span>Degradation of a lyophilized formulation of <span class="hlt">BMS</span>-204352: identification of degradants and role of elastomeric closures.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Nassar, Munir N; Nesarikar, Vishwas V; Lozano, Ruben; Huang, Yande; Palaniswamy, Venkatapuram</p> <p>2005-01-01</p> <p>The purpose of this study was to identify two degradation products formed in the parenteral lyophilized formulation of <span class="hlt">BMS</span>-204352, investigate the possible role of elastomeric closures in their formation, and develop a strategy to minimize/control their formation. The first degradant was identified as the hydroxymethyl derivative (formaldehyde adduct, <span class="hlt">BMS</span>-215842) of the drug substance formed by the reaction of <span class="hlt">BMS</span>-204352 with formaldehyde. Structure confirmation was <span class="hlt">based</span> on liquid chromatography/mass spectroscopy (LC/MS), nuclear magnetic resonance (NMR), and chromatographic comparison to an authentic sample of the hydroxymethyl degradation product, <span class="hlt">BMS</span>-215842. To confirm the hypothesis that formaldehyde originated from the rubber closure, migrated into the product, and reacted with <span class="hlt">BMS</span>-204352 drug substance to form the hydroxymethyl degradant, lyophilized drug product was manufactured, the vials were stoppered with two different rubber closure formulations, and its stability was monitored. The formaldehyde adduct degradant was observed only in the drug product vials stoppered with one of the rubber closures that was evaluated. Although formaldehyde has not been detected historically as leachable and is not an added ingredient in the rubber formulation, information obtained from the stopper manufacturer indicated that the reinforcing agent used in the stopper formulation may be a potential source of formaldehyde. The second degradant was identified as the desfluoro hydroxy analog (<span class="hlt">BMS</span>-188929) <span class="hlt">based</span> on LC/MS, NMR, and chromatographic comparison to an authentic sample of the desfluoro hydroxy degradation product.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2017EGUGA..1917546L','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2017EGUGA..1917546L"><span>Remediation of Cd-contaminated soil around <span class="hlt">metal</span> <span class="hlt">sulfide</span> mines</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Lu, Xinzhe; Hu, Xuefeng; Kang, Zhanjun; Luo, Fan</p> <p>2017-04-01</p> <p>The mines of <span class="hlt">metal</span> <span class="hlt">sulfides</span> are widely distributed in the southwestern part of Zhejiang Province, Southeast China. The activities of mining, however, often lead to the severe pollution of heavy <span class="hlt">metals</span> in soils, especially Cd contamination. According to our field investigations, the spatial distribution of Cd-contaminated soils is highly consistent with the presence of <span class="hlt">metal</span> <span class="hlt">sulfide</span> mines in the areas, further proving that the mining activities are responsible for Cd accumulation in the soils. To study the remediation of Cd-contaminated soils, a paddy field nearby large <span class="hlt">sulfide</span> mines, with soil pH 6 and Cd more than 1.56 mg kg-1, five times higher than the national recommended threshold, was selected. Plastic boards were deeply inserted into soil to separate the field and make experimental plots, with each plot being 4 m×4 m. Six treatments, TK01˜TK06, were designed to study the effects of different experimental materials on remediating Cd-contaminated soils. The treatment of TK01 was the addition of 100 kg zeolites to the plot; TK02, 100 kg apatites; TK03, 100 kg humid manure; TK04, 50 kg zeolites + 50 kg apatites; TK05, 50 kg zeolites + 50 kg humid manure; TK06 was blank control (CK). One month after the treatments, soil samples at the plots were collected to study the possible change of chemical forms of Cd in the soils. The results indicated that these treatments reduced the content of available Cd in the soils effectively, by a decreasing sequence of TK04 (33%) > TK02 (25%) > TK01 (23%) > TK05 (22%) > TK03 (15%), on the basis of CK. Correspondingly, the treatments also reduced the content of Cd in rice grains significantly, by a similar decreasing sequence of TK04 (83%) > TK02 (77%) > TK05 (63%) > TK01 (47%) > TK03 (27%). The content of Cd in the rice grains was 0.071 mg kg-1, 0.094 mg kg-1, 0.159 mg kg-1, 0.22 mg kg-1 and 0.306 mg kg-1, respectively, compared with CK, 0.418 mg kg-1. This experiment suggested that the reduction of available Cd in the soils is</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://pubs.er.usgs.gov/publication/70012203','USGSPUBS'); return false;" href="https://pubs.er.usgs.gov/publication/70012203"><span>Platinum <span class="hlt">metals</span> in magmatic <span class="hlt">sulfide</span> ores</span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Naldrett, A.J.; Duke, J.M.</p> <p>1980-01-01</p> <p>Platinum-group elements (PGE) are mined predominantly from deposits that have formed by the segregation of molten iron-nickel-copper <span class="hlt">sulfides</span> from silicate magmas. The absolute concentrations of PGE in <span class="hlt">sulfides</span> from different deposits vary over a range of five orders of magnitude, whereas those of other chalcophile elements vary by factors of only 2 to 100. However, the relative proportions of the different PGE in a given deposit are systematically related to the nature of the parent magma. The absolute and relative concentrations of PGE in magmatic <span class="hlt">sulfides</span> are explained in terms of the degree of partial melting of mantle peridotite required to produce the parent magma and the processes of batch equilibration and fractional segregation of <span class="hlt">sulfides</span>. The Republic of South Africa and the U.S.S.R. together possess more than 97 percent of the world PGE reserves, but significant undeveloped resources occur in North America. The Stillwater complex in Montana is perhaps the most important example. Copyright ?? 1980 AAAS.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2013M%26PS...48..730H','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2013M%26PS...48..730H"><span>Wüstite in the fusion crust of Almahata Sitta <span class="hlt">sulfide-metal</span> assemblage MS-166: Evidence for oxygen in <span class="hlt">metallic</span> melts</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Horstmann, Marian; Humayun, Munir; Harries, Dennis; Langenhorst, Falko; Chabot, Nancy L.; Bischoff, Addi; Zolensky, Michael E.</p> <p>2013-05-01</p> <p>Meteorite fusion crusts form during the passage of a meteoroid through the Earth's atmosphere and are highly oxidized intergrowths as documented by the presence of e.g., oxides. The porous and irregular fusion crust surrounding the Almahata Sitta <span class="hlt">sulfide-metal</span> assemblage MS-166 was found highly enriched in wüstite (Fe1-xO). Frictional heating of the outer portions of the assemblage caused partial melting of predominantly the Fe-<span class="hlt">sulfide</span> and minor amounts of the outer Ni-rich portions of the originally zoned <span class="hlt">metal</span> in MS-166. Along with melting significant amounts of oxygen were incorporated into the molten fusion crust and mainly FeS was oxidized and desulfurized to form wüstite. Considerable amounts of FeS were lost due to ablation, whereas the cores of the large <span class="hlt">metal</span> grains appear largely unmelted leaving behind <span class="hlt">metal</span> grains and surrounding wüstite-rich material (matte). <span class="hlt">Metal</span> grains along with the surrounding matte typically form an often highly porous framework of globules interconnected with the matte. Although textures and chemical composition suggest that melting of Fe,Ni <span class="hlt">metal</span> occurred only partially (Ni-rich rims), there is a trace elemental imprint of siderophile element partitioning influenced by oxygen in the <span class="hlt">metallic</span> melt as indicated by the behavior of W and Ga, the two elements significantly affected by oxygen in a <span class="hlt">metallic</span> melt. It is remarkable that MS-166 survived the atmospheric passage as troilite inclusions in iron meteorites are preferentially destroyed.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/25304900','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/25304900"><span><span class="hlt">BMS</span>-777607 promotes megakaryocytic differentiation and induces polyploidization in the CHRF-288-11 cells.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Nurhayati, Retno Wahyu; Ojima, Yoshihiro; Taya, Masahito</p> <p>2015-04-01</p> <p>Introduction of a polyploidy inducer is a promising strategy to achieve a high level of polyploidization during megakaryocytic (MK) differentiation. Here, we report that a multi-kinase inhibitor, <span class="hlt">BMS</span>-777607, is a potent polyploidy inducer for elevating high ploidy cell formation in the MK-differentiated CHRF-288-11 (CHRF) cells. Our result showed that <span class="hlt">BMS</span>-777607 strongly inhibited cell division without affecting cell viability when detected at day 1 after treatment. As a consequence, the high ploidy (≥8N) cells were accumulated in culture for 8 days, with an increase from 16.2 to 75.2 % of the total cell population. The elevated polyploidization was accompanied by the increased expression level of MK marker, CD41 (platelet glycoprotein IIb/IIIa, GPIIb/IIIa), suggesting that <span class="hlt">BMS</span>-777607 promoted both polyploidization and commitment of MK-differentiated CHRF cells. Platelet-like fragments (PFs) were released by mature CHRF cells. <span class="hlt">Based</span> on a flow cytometry assay, it was found that the PFs produced from <span class="hlt">BMS</span>-777607-treated cells tended to have larger size and higher expression of GPIIb/IIIa, a receptor for platelet adhesion. Taken together, these results suggested that <span class="hlt">BMS</span>-777607 promoted MK differentiation of CHRF cells and increased the functional property of platelet-like fragments.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/28265691','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/28265691"><span>Safety, pharmacokinetics, and pharmacodynamics of <span class="hlt">BMS</span>-986142, a novel reversible BTK inhibitor, in healthy participants.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Lee, Sun Ku; Xing, Jun; Catlett, Ian M; Adamczyk, Robert; Griffies, Amber; Liu, Ang; Murthy, Bindu; Nowak, Miroslawa</p> <p>2017-06-01</p> <p><span class="hlt">BMS</span>-986142 is an oral, small-molecule reversible inhibitor of Bruton's tyrosine kinase. The main objectives of our phase I studies were to characterize the safety and tolerability, pharmacokinetics, and pharmacodynamics of <span class="hlt">BMS</span>-986142 in healthy participants, and to investigate the potential for the effect of <span class="hlt">BMS</span>-986142 on the PK of methotrexate (MTX) in combination. In a combined single ascending dose and multiple ascending dose study, the safety, pharmacokinetics, and pharmacodynamics of <span class="hlt">BMS</span>-986142 were assessed in healthy non-Japanese participants following administration of a single dose (5-900 mg) or multiple doses (25-350 mg, once daily for 14 days). In a drug-drug interaction study, the effect of <span class="hlt">BMS</span>-986142 (350 mg, once daily for 5 days) on the single-dose pharmacokinetics of MTX (7.5 mg) was assessed in healthy participants. <span class="hlt">BMS</span>-986142 was generally well tolerated, alone and in combination with MTX. <span class="hlt">BMS</span>-986142 was rapidly absorbed with peak concentrations occurring within 2 h, and was eliminated with a mean half-life ranging from 7 to 11 h. Exposure of <span class="hlt">BMS</span>-986142 appeared dose proportional within the dose ranges tested. A dose- and concentration-dependent inhibition of CD69 expression was observed following administration of <span class="hlt">BMS</span>-986142. <span class="hlt">BMS</span>-986142 did not affect the pharmacokinetics of MTX. <span class="hlt">BMS</span>-986142 was well tolerated at the doses tested, had pharmacokinetic and pharmacodynamic profiles which support once-daily dosing, and can be coadministered with MTX without the pharmacokinetic interaction of <span class="hlt">BMS</span>-986142 on MTX.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2017ApSS..394..132M','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2017ApSS..394..132M"><span><span class="hlt">Sulfide</span> stress corrosion study of a super martensitic stainless steel in H2S sour environments: <span class="hlt">Metallic</span> <span class="hlt">sulfides</span> formation and hydrogen embrittlement</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Monnot, Martin; Nogueira, Ricardo P.; Roche, Virginie; Berthomé, Grégory; Chauveau, Eric; Estevez, Rafael; Mantel, Marc</p> <p>2017-02-01</p> <p>Thanks to their high corrosion resistance, super martensitic stainless steels are commonly used in the oil and gas industry, particularly in sour environments. Some grades are however susceptible to undergo hydrogen and mechanically-assisted corrosion processes in the presence of H2S, depending on the pH. The martensitic stainless steel EN 1.4418 grade exhibits a clear protective passive behavior with no <span class="hlt">sulfide</span> stress corrosion cracking when exposed to sour environments of pH ≥ 4, but undergoes a steep decrease in its corrosion resistance at lower pH conditions. The present paper investigated this abrupt loss of corrosion resistance with electrochemical measurements as well as different physicochemical characterization techniques. Results indicated that below pH 4.0 the <span class="hlt">metal</span> surface is covered by a thick (ca 40 μm) porous and defect-full <span class="hlt">sulfide</span>-rich corrosion products layer shown to be straightforwardly related to the onset of hydrogen and <span class="hlt">sulfide</span> mechanically-assisted corrosion phenomena.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.gpo.gov/fdsys/pkg/CFR-2014-title23-vol1/pdf/CFR-2014-title23-vol1-sec970-210.pdf','CFR2014'); return false;" href="https://www.gpo.gov/fdsys/pkg/CFR-2014-title23-vol1/pdf/CFR-2014-title23-vol1-sec970-210.pdf"><span>23 CFR 970.210 - Federal lands bridge management system (<span class="hlt">BMS</span>).</span></a></p> <p><a target="_blank" href="http://www.gpo.gov/fdsys/browse/collectionCfr.action?selectedYearFrom=2014&page.go=Go">Code of Federal Regulations, 2014 CFR</a></p> <p></p> <p>2014-04-01</p> <p>... Section 970.210 Highways FEDERAL HIGHWAY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION FEDERAL LANDS... needs using, as a minimum, the following components: (1) A database and an ongoing program for the... <span class="hlt">BMS</span>. The minimum <span class="hlt">BMS</span> database shall include: (i) Data described by the inventory section of the...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2016AGUFM.V53E..07R','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2016AGUFM.V53E..07R"><span>Equilibrium Tin Isotope Fractionation during <span class="hlt">Metal-Sulfide</span>-Silicate Differentiation: A Nuclear Resonant Inelastic X-ray Scattering Approach</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Roskosz, M.; Amet, Q.; Fitoussi, C.; Laporte, D.; Hu, M. Y.; Alp, E. E.</p> <p>2016-12-01</p> <p><span class="hlt">Metal</span>-silicate differentiation was recently addressed through the insight of the isotopic composition of siderophile elements (mainly Fe, Si and Cr isotopes) of planetary and extraterrestrial bodies. A key limitation of this approach is however the knowledge of equilibrium fractionation factors between coexisting phases (<span class="hlt">metal</span> alloys, silicates and <span class="hlt">sulfides</span>) used to interpret data on natural samples. These properties are difficult to determine experimentally. In this context, tin is generally classified as a chalcophile element but it is also siderophile and volatile. We applied a synchrotron-<span class="hlt">based</span> method to circumvent difficulties related to determination of equilibrium isotope fractionation. The nuclear resonant inelastic x-ray scattering (NRIXS) was used to measure the phonon excitation spectrum and then to derive the force constant and finally the fractionation factors of Sn-bearing geomaterials. Spectroscopic measurements were carried out at room pressure at Sector 30-ID (APS, USA). A range of Fe-Ni alloys, rhyolitic and basaltic glasses and iron <span class="hlt">sulfides</span> containing isotopically enriched 119Sn were synthesized. The tin content and the redox conditions prevailing during the synthesis were varied. The data evaluation was carried out using PHOENIX and SciPhon programs. A strong effect of both the redox state and the tin content was measured. In addition, the composition of the silicate glasses was found to be another important factor determining the tin isotope <span class="hlt">metal-silicate-sulfide</span> fractionation factors. Our results are consistent with trends previously observed in the case of iron isotopes [1,2]. We will discuss the implications of our experimental results in terms of tin isotope planetary signatures. References: [1] Dauphas et al. (2014), EPSL, 398, 127-140; [2] Roskosz et al. (2015), GCA, 169, 184-199.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/27415579','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/27415579"><span>Monocyte to HDL ratio in prediction of <span class="hlt">BMS</span> restenosis in subjects with stable and unstable angina pectoris.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Tok, Derya; Turak, Osman; Yayla, Çağrı; Ozcan, Fırat; Tok, Duran; Çağlı, Kumral</p> <p>2016-08-01</p> <p>This study aims to assess the predictive role of the preprocedural circulating monocyte to high-density lipoprotein (HDL) cholesterol ratio (MHR) on the occurrence of stent restenosis (SR) in patients with stable and unstable angina pectoris undergoing successful bare-<span class="hlt">metal</span> stenting (<span class="hlt">BMS</span>). Between February 2008 and June 2014, a total of 831 patients with stable and unstable angina pectoris who underwent successful <span class="hlt">BMS</span> were retrospectively analyzed. Demographic and clinical characteristics of the patients were recorded. Left ventricular ejection fraction and laboratory data were also noted. In the receiver operating characteristics curve analysis, MHR >14 had 71% sensitivity and 69% specificity in predicting SR. Our study results show that preprocedural MHR is an independent predictor of SR in this patient population.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2018JHEP...01..142C','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2018JHEP...01..142C"><span>Asymptotic dynamics in perturbative quantum gravity and <span class="hlt">BMS</span> supertranslations</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Choi, Sangmin; Kol, Uri; Akhoury, Ratindranath</p> <p>2018-01-01</p> <p>Recently it has been shown that infrared divergences in the conventional S-matrix elements of gauge and gravitational theories arise from a violation of the conservation laws associated with large gauge symmetries. These infrared divergences can be cured by using the Faddeev-Kulish (FK) asymptotic states as the basis for S-matrix elements. Motivated by this connection, we study the action of <span class="hlt">BMS</span> supertranslations on the FK asymptotic states of perturbative quantum gravity. We compute the <span class="hlt">BMS</span> charge of the FK states and show that it characterizes the superselection sector to which the state belongs. Conservation of the <span class="hlt">BMS</span> charge then implies that there is no transition between different superselection sectors, hence showing that the FK graviton clouds implement the necessary transition induced by the scattering process.</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_4");'>4</a></li> <li><a href="#" onclick='return showDiv("page_5");'>5</a></li> <li class="active"><span>6</span></li> <li><a href="#" onclick='return showDiv("page_7");'>7</a></li> <li><a href="#" onclick='return showDiv("page_8");'>8</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_6 --> <div id="page_7" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_5");'>5</a></li> <li><a href="#" onclick='return showDiv("page_6");'>6</a></li> <li class="active"><span>7</span></li> <li><a href="#" onclick='return showDiv("page_8");'>8</a></li> <li><a href="#" onclick='return showDiv("page_9");'>9</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="121"> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/servlets/purl/10119308','SCIGOV-STC'); return false;" href="https://www.osti.gov/servlets/purl/10119308"><span>Studies of high temperature ternary phases in mixed-<span class="hlt">metal</span>-rich early transition <span class="hlt">metal</span> <span class="hlt">sulfide</span> and phosphide systems</span></a></p> <p><a target="_blank" href="http://www.osti.gov/search">DOE Office of Scientific and Technical Information (OSTI.GOV)</a></p> <p>Marking, Gregory Allen</p> <p>1994-01-04</p> <p>Investigations of ternary mixed early transition <span class="hlt">metal</span>-rich <span class="hlt">sulfide</span> and phosphide systems resulted in the discovery of new structures and new phases. A new series of Zr and Hf - group V transition <span class="hlt">metal</span> - sulfur K-phases was synthesized and crystallographically characterized. When the group V transition <span class="hlt">metal</span> was Nb or Ta, the unit cell volume was larger than any previously reported K-phase. The presence of adventitious oxygen was determined in two K-phases through a combination of neutron scattering and X-ray diffraction experiments. A compound Hf 10Ta 3S 3 was found to crystallize in a new-structure type similar to the knownmore » gamma brasses. This structure is unique in that it is the only reported "stuffed" gamma-brass type structure. The <span class="hlt">metal</span> components, Hf and Ta, are larger in size and more electropositive than the <span class="hlt">metals</span> found in normal gamma brasses (e.g. Cu and Zn) and because of the larger <span class="hlt">metallic</span> radii, sulfur can be incorporated into the structure where it plays an integral role in stabilizing this phase relative to others. X-ray single-crystal, X-ray powder and neutron powder refinements were performed on this structure. A new structure was found in the ternary Nb-Zr-P system which has characteristics in common with many known early transition <span class="hlt">metal</span>-rich <span class="hlt">sulfides</span>, selenides, and phosphides. This structure has the simplest known interconnection of the basic building blocks known for this structural class. Anomalous scattering was a powerful tool for differentiating between Zr and Nb when using Mo Kα X-radiation. The compounds ZrNbP and HfNbP formed in the space group Prima with the simple Co 2Si structure which is among the most common structures found for crystalline solid materials. Solid solution compounds in the Ta-Nb-P, Ta-Zr-P, Nb-Zr-P, Hf-Nb-P, and Hf-Zr-S systems were crystallographically characterized. The structural information corroborated ideas about bonding in <span class="hlt">metal</span>-rich compounds.« less</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://eric.ed.gov/?q=potassium&pg=6&id=EJ339350','ERIC'); return false;" href="https://eric.ed.gov/?q=potassium&pg=6&id=EJ339350"><span>A Reaction Involving Oxygen and <span class="hlt">Metal</span> <span class="hlt">Sulfides</span>.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Hill, William D. Jr.</p> <p>1986-01-01</p> <p>Describes a procedure for oxygen generation by thermal decomposition of potassium chlorate in presence of manganese dioxide, reacted with various <span class="hlt">sulfides</span>. Provides a table of sample product yields for various <span class="hlt">sulfides</span>. (JM)</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/1993Metic..28Q.360H','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/1993Metic..28Q.360H"><span>A Tale of Two Melt Rocks: Equilibration and <span class="hlt">Metal/Sulfide</span>-Silicate Segregation in the L7 Chondrites PAT 91501 and LEW 88663</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Harvey, R. P.</p> <p>1993-07-01</p> <p>Type 7 ordinary chondrites have experienced temperatures near or beyond those necessary for partial melting. Two recently collected Antarctic specimens, PAT91501 (PAT) and LEW88663 (LEW), have been tentatively identified as L7 chondrites <span class="hlt">based</span> on mineral and oxygen isotope compositions [1,2]. The petrology and mineralogy of these meteorites suggests that they have undergone significant <span class="hlt">metal/sulfide</span>-silicate segregation, with implications for meteorite parent bodies. PAT consists of an equigranular contact-framework of nearly euhedral olivine grains, with interstitial spaces filled by plagioclase, pyroxenes, and several minor phases. Ortho- and clinopyroxene occur in an exsolution relationship. Olivine and pyroxene are highly equilibrated, varying <<1% in Fe-endmember content. Pyroxene equilibration temperatures calculated for PAT using the methods of [3] are self-consistent at about 1180 degrees C. In thin section, PAT contains only traces of <span class="hlt">metal</span>, as tiny isolated blebs in <span class="hlt">sulfide</span> grains; large (>1 cm) globular <span class="hlt">sulfide</span> inclusions are seen in hand-sample [1], but are not present in the section examined. LEW was originally classified as an achondrite with olivine and pyroxene compositions similar to those in L chondrites [2]. <span class="hlt">Metal</span> is absent in LEW, although the specimen is small and heavily rusted, making it impossible to gauge the original <span class="hlt">metal</span> content. Olivine grains are commonly rounded in shape and seldom in contact with more than a few other grains. LEW olivine and pyroxene are also highly equilibrated. Veins of Ni-bearing <span class="hlt">metal</span> oxides and <span class="hlt">sulfides</span> are common. Both low- and high-Ca pyroxene occur as discrete grains, orthopyroxene often poikilitically enclosing olivine. Pyroxene equilibration temperatures for LEW are more variable than those for PAT and consistently lower, with an average around 900 degrees C. The various textural and compositional characteristics of PAT and LEW suggest they have experienced partial melting to varying degrees. Both visually</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.gpo.gov/fdsys/pkg/CFR-2014-title23-vol1/pdf/CFR-2014-title23-vol1-sec973-210.pdf','CFR2014'); return false;" href="https://www.gpo.gov/fdsys/pkg/CFR-2014-title23-vol1/pdf/CFR-2014-title23-vol1-sec973-210.pdf"><span>23 CFR 973.210 - Indian lands bridge management system (<span class="hlt">BMS</span>).</span></a></p> <p><a target="_blank" href="http://www.gpo.gov/fdsys/browse/collectionCfr.action?selectedYearFrom=2014&page.go=Go">Code of Federal Regulations, 2014 CFR</a></p> <p></p> <p>2014-04-01</p> <p>... 23 Highways 1 2014-04-01 2014-04-01 false Indian lands bridge management system (<span class="hlt">BMS</span>). 973.210... HIGHWAYS MANAGEMENT SYSTEMS PERTAINING TO THE BUREAU OF INDIAN AFFAIRS AND THE INDIAN RESERVATION ROADS PROGRAM Bureau of Indian Affairs Management Systems § 973.210 Indian lands bridge management system (<span class="hlt">BMS</span>...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/29675973','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/29675973"><span>Zinc cobalt <span class="hlt">sulfide</span> nanosheets array derived from 2D bimetallic <span class="hlt">metal</span>-organic frameworks for high-performance supercapacitor.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Tao, Kai; Han, Xue; Cheng, Qiuhui; Yang, Yujing; Yang, Zheng; Ma, Qingxiang; Han, Lei</p> <p>2018-04-19</p> <p>Porous ternary <span class="hlt">metal</span> <span class="hlt">sulfide</span> integrated electrode materials with abundant electroactive sites and redox reactions are very promising for supercapacitors. Here, porous zinc cobalt <span class="hlt">sulfide</span> nanosheets array on Ni foam (Zn-Co-S/NF) has been successfully constructed by a facile growth of 2D bimetallic zinc/cobalt-<span class="hlt">based</span> <span class="hlt">metal</span>-organic frameworks (Zn/Co-MOF) nanosheets with leaf-like morphology on Ni foam, followed by additional sulfurization. The Zn-Co-S/NF nanosheets array is directly acted as an electrode for supercapacitor, showing much better electrochemical performance (2354.3 F g-1 and 88.6% retention over 1000 cycles) when compared with zinc cobalt <span class="hlt">sulfide</span> powder (355.3 F g-1 and 75.8% retention over 1000 cycles), which is originated from good electric conductivity and mechanical stability, abundant electroactive sites, and facilitated transportation of electron and electrolyte ion endowed by the unique nanosheets array structure. The asymmetric supercapacitor (ASC) device assembled from Zn-Co-S/NF and activated carbon electrodes can deliver the highest energy density of 31.9 Wh kg-1 and the maximum power density of 8.5 kW kg-1. Most importantly, this ASC also presents good cycling stability (97% retention over 1000 cycles). Furthermore, a red light-emitting diode (LED) can be illuminated by two connected ASCs, indicating that as-synthesized Zn-Co-S/NF hold great potential for practical applications. © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/26921118','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/26921118"><span>Dehydration and Stabilization of a Reactive Tertiary Hydroxyl Group in Solid Oral Dosage Forms of <span class="hlt">BMS</span>-779788.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Adams, Monica L; Sharma, Vijayata; Gokhale, Madhushree; Huang, Yande; Stefanski, Kevin; Su, Ching; Hussain, Munir A</p> <p>2016-04-01</p> <p><span class="hlt">BMS</span>-779788 contains a reactive tertiary hydroxyl attached to a weakly basic imidazole ring. Propensity of the carbinol toward dehydration to yield the corresponding alkene, <span class="hlt">BMS</span>-779788-ALK, was evaluated. Elevated levels of <span class="hlt">BMS</span>-779788-ALK were observed in excipient compatibility samples. Stability studies revealed that <span class="hlt">BMS</span>-779788 degrades to <span class="hlt">BMS</span>-779788-ALK in capsules and tablets prepared by both dry and wet granulation processes. An acid-catalyzed dehydration mechanism, in which the heterocyclic core contributes resonance stability to the cationic intermediate via charge transfer to the imidazole ring, was proposed. Therefore, neutralization via a buffered (pH 7.0) granulating solution was used to mitigate dehydration. Solution studies revealed degradation of <span class="hlt">BMS</span>-779788 to <span class="hlt">BMS</span>-779788-ALK over the pH range of 1-7.5. Reversibility was confirmed by initiating reactions with <span class="hlt">BMS</span>-779788-ALK over the same pH range. Accordingly, a simple reversible scheme can be used to describe reactions initiated with either <span class="hlt">BMS</span>-779788 or <span class="hlt">BMS</span>-779788-ALK. To eliminate potential for charge delocalization across the heterocycle and probe the degradation mechanism, the imidazole ring of <span class="hlt">BMS</span>-779788 was methylated (<span class="hlt">BMS</span>-779788-Me). The propensity for acid-catalyzed dehydration was then evaluated. The acid stability of <span class="hlt">BMS</span>-779788-Me confirmed that the heterocyclic core contributes to reactivity liability of the tertiary hydroxyl. Copyright © 2016 American Pharmacists Association®. Published by Elsevier Inc. All rights reserved.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://pubs.er.usgs.gov/publication/70022363','USGSPUBS'); return false;" href="https://pubs.er.usgs.gov/publication/70022363"><span>Influence of acid volatile <span class="hlt">sulfides</span> and <span class="hlt">metal</span> concentrations on <span class="hlt">metal</span> partitioning in contaminated sediments</span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Lee, J.-S.; Lee, B.-G.; Luoma, S.N.; Choi, H.J.; Koh, C.-H.; Brown, C.L.</p> <p>2000-01-01</p> <p>The influence of acid volatile <span class="hlt">sulfide</span> (AVS) on the partitioning of Cd, Ni, and Zn in porewater (PW) and sediment as reactive <span class="hlt">metals</span> (SEM, simultaneously extracted <span class="hlt">metals</span>) was investigated in laboratory microcosms. Two spiking procedures were compared, and the effects of vertical geochemical gradients and infaunal activity were evaluated. Sediments were spiked with a Cd-Ni-Zn mixture (0.06, 3, 7.5 ??mol/g, respectively) containing four levels of AVS (0.5, 7.5, 15, 35 ??mol/g). The results were compared to sediments spiked with four levels of Cd-Ni-Zn mixtures at one AVS concentration (7.5 ??mol/g). A vertical redox gradient was generated in each treatment by an 18-d incubation with an oxidized water column. [AVS] in the surface sediments decreased by 65-95% due to oxidation during incubation; initial [AVS] was maintained at 0.5-7.5 cm depth. PW <span class="hlt">metal</span> concentrations were correlated with [SEM - AVS] among all data. But PW <span class="hlt">metal</span> concentrations were variable, causing the distribution coefficient, Kd(pw) (the ratio of [SEM] to PW <span class="hlt">metal</span> concentrations) to vary by 2-3 orders of magnitude at a given [SEM - AVS]. One reason for the variability was that vertical profiles in PW <span class="hlt">metal</span> concentrations appeared to be influenced by diffusion as well as [SEM - AVS]. The presence of animals appeared to enhance the diffusion of at least Zn. The generalization that PW <span class="hlt">metal</span> concentrations are controlled by [SEM - AVS] is subject to some important qualifications if vertical gradients are complicated, <span class="hlt">metal</span> concentrations vary, or equilibration times differ.The influence of acid volatile <span class="hlt">sulfide</span> (AVS) on the partitioning of Cd, Ni, and Zn in porewater (PW) and sediment as reactive <span class="hlt">metals</span> (SEM, simultaneously extracted <span class="hlt">metals</span>) was investigated in laboratory microcosms. Two spiking procedures were compared, and the effects of vertical geochemical gradients and infaunal activity were evaluated. Sediments were spiked with a Cd-Ni-Zn mixture (0.06, 3, 7.5 ??mol/g, respectively) containing</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2017PCM....44..561G','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2017PCM....44..561G"><span><span class="hlt">Sulfide</span> bonded atomic radii</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Gibbs, G. V.; Ross, N. L.; Cox, D. F.</p> <p>2017-09-01</p> <p>The bonded radius, r b(S), of the S atom, calculated for first- and second-row non-transition <span class="hlt">metal</span> <span class="hlt">sulfide</span> crystals and third-row transition <span class="hlt">metal</span> <span class="hlt">sulfide</span> molecules and crystals indicates that the radius of the sulfur atom is not fixed as traditionally assumed, but that it decreases systematically along the bond paths of the bonded atoms with decreasing bond length as observed in an earlier study of the bonded radius of the oxygen atom. When bonded to non-transition <span class="hlt">metal</span> atoms, r b(S) decreases systematically with decreasing bond length from 1.68 Å when the S atom is bonded to the electropositive VINa atom to 1.25 Å when bonded to the more electronegative IVP atom. In the case of transition <span class="hlt">metal</span> atoms, rb(S) likewise decreases with decreasing bond length from 1.82 Å when bonded to Cu and to 1.12 Å when bonded to Fe. As r b(S) is not fixed at a given value but varies substantially depending on the bond length and the field strength of the bonded atoms, it is apparent that sets of crystal and atomic <span class="hlt">sulfide</span> atomic radii <span class="hlt">based</span> on an assumed fixed radius for the sulfur atom are satisfactory in that they reproduce bond lengths, on the one hand, whereas on the other, they are unsatisfactory in that they fail to define the actual sizes of the bonded atoms determined in terms of the minima in the electron density between the atoms. As such, we urge that the crystal chemistry and the properties of <span class="hlt">sulfides</span> be studied in terms of the bond lengths determined by adding the radii of either the atomic and crystal radii of the atoms but not in terms of existing sets of crystal and atomic radii. After all, the bond lengths were used to determine the radii that were experimentally determined, whereas the individual radii were determined on the basis of an assumed radius for the sulfur atom.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2017JSSCh.255...97L','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2017JSSCh.255...97L"><span>A nanoscale Zr-<span class="hlt">based</span> fluorescent <span class="hlt">metal</span>-organic framework for selective and sensitive detection of hydrogen <span class="hlt">sulfide</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Li, Yanping; Zhang, Xin; Zhang, Ling; Jiang, Ke; Cui, Yuanjing; Yang, Yu; Qian, Guodong</p> <p>2017-11-01</p> <p>Hydrogen <span class="hlt">sulfide</span> (H2S) has been commonly viewed as a gas signaling molecule in various physiological and pathological processes. However, the highly efficient H2S detection still remains challenging. Herein, we designed a new robust nano <span class="hlt">metal</span>-organic framework (MOF) UiO-66-CH=CH2 as a fluorescent probe for rapid, sensitive and selective detection of biological H2S. UiO-66-CH=CH2 was prepared by heating ZrCl4 and 2-vinylterephthalic acid via a simple method. UiO-66-CH=CH2 displayed fluorescence quenching to H2S and kept excellent selectivity in the presence of biological relevant analytes especially the cysteine and glutathione. This MOF-<span class="hlt">based</span> probe also exhibited fast response (10 s) and high sensitivity with a detection limit of 6.46 μM which was within the concentration range of biological H2S in living system. Moreover, this constructed MOF featured water-stability, nanoscale (20-30 nm) and low toxicity, which made it a promising candidate for biological H2S sensing.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/24519634','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/24519634"><span>Spatial variation of acid-volatile <span class="hlt">sulfide</span> and simultaneously extracted <span class="hlt">metals</span> in Egyptian Mediterranean Sea lagoon sediments.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Younis, Alaa M; El-Zokm, Gehan M; Okbah, Mohamed A</p> <p>2014-06-01</p> <p>In risk assessment of aquatic sediments, the immobilizing effect of acid-volatile <span class="hlt">sulfide</span> (AVS) on trace <span class="hlt">metals</span> is a principal control on availability and associated toxicity of <span class="hlt">metals</span> to aquatic biota, which reduces <span class="hlt">metal</span> bioavailability and toxicity by binding and immobilizing <span class="hlt">metals</span> as insoluble <span class="hlt">sulfides</span>. Spatial variation pattern of AVS, simultaneously extracted <span class="hlt">metals</span> (SEM), and sediment characteristics were studied for the first time in surface sediment samples (0-20 cm) from 43 locations in Egyptian northern delta lagoons (Manzalah, Burullus, and Maryut) as predictors of the bioavailability of some divalent <span class="hlt">metals</span> (Cu, Zn, Cd, Pb, and Ni) in sediments as well as indicators of <span class="hlt">metal</span> toxicity in anaerobic sediments. The results indicated that the ∑SEM (Cu + Zn + Cd + Pb + Ni) values in sediments of lagoon Burullus had higher concentrations than those of Maryut and Manzalah. In contrast, AVS concentrations were considerably higher in lagoons Manzalah and Maryut and seemed to be consistent with the increase in organic matter than lagoon Burullus. Generally, the average concentrations of the SEM in all lagoons were in the order of Zn > Cu > Ni > Pb > Cd. The ratios of ∑SEM/AVS were less than 1 at all the sampling stations except at one station in lagoon Maryut as well as four stations located in lagoon Burullus (∑SEM/AVS > 1), which suggests that the <span class="hlt">metals</span> have toxicity potential in these sediments. Therefore, SEM concentrations probably are better indicators of the <span class="hlt">metal</span> bioavailability in sediments than the conventional total <span class="hlt">metal</span> concentrations.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/26070345','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/26070345"><span>Sulfur-Mediated Electron Shuttling Sustains Microbial Long-Distance Extracellular Electron Transfer with the Aid of <span class="hlt">Metallic</span> Iron <span class="hlt">Sulfides</span>.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Kondo, Katsuhito; Okamoto, Akihiro; Hashimoto, Kazuhito; Nakamura, Ryuhei</p> <p>2015-07-07</p> <p>In addition to serving as an energy source for microbial growth, iron <span class="hlt">sulfides</span> are proposed to act as naturally occurring electrical wires that mediate long-distance extracellular electron transfer (EET) and bridge spatially discrete redox environments. These hypothetical EET reactions stand on the abilities of microbes to use the interfacial electrochemistry of <span class="hlt">metallic</span>/semiconductive iron <span class="hlt">sulfides</span> to maintain metabolisms; however, the mechanisms of these phenomena remain unexplored. To obtain insight into EET to iron <span class="hlt">sulfides</span>, we monitored EET at the interface between Shewanella oneidensis MR-1 cells and biomineralized iron <span class="hlt">sulfides</span> in an electrochemical cell. Respiratory current steeply increased with the concomitant formation of poorly crystalline mackinawite (FeS) minerals, indicating that S. oneidensis has the ability to exploit extracellularly formed <span class="hlt">metallic</span> FeS for long-distance EET. Deletion of major proteins of the <span class="hlt">metal</span>-reduction (Mtr) pathway (OmcA, MtrC, CymA, and PilD) caused only subtle effects on the EET efficiency, a finding that sharply contrasts the majority of studies that report that the Mtr pathway is indispensable for the reduction of <span class="hlt">metal</span> oxides and electrodes. The gene expression analyses of polysulfide and thiosulfate reductase suggest the existence of a sulfur-mediated electron-shuttling mechanism by which HS(-) ions and water-soluble polysulfides (HS(n)(-), where n ≥ 2) generated in the periplasmic space deliver electrons from cellular metabolic processes to cell surface-associated FeS. The finding of this Mtr-independent pathway indicates that polysulfide reductases complement the function of outer-membrane cytochromes in EET reactions and, thus, significantly expand the number of microbial species potentially capable of long-distance EET in sulfur-rich anoxic environments.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/biblio/5385965-sulfide-scaling-low-enthalpy-geothermal-environments-survey','SCIGOV-STC'); return false;" href="https://www.osti.gov/biblio/5385965-sulfide-scaling-low-enthalpy-geothermal-environments-survey"><span><span class="hlt">Sulfide</span> scaling in low enthalpy geothermal environments; A survey</span></a></p> <p><a target="_blank" href="http://www.osti.gov/search">DOE Office of Scientific and Technical Information (OSTI.GOV)</a></p> <p>Criaud, A.; Fouillac, C.</p> <p>1989-01-01</p> <p>A review of the <span class="hlt">sulfide</span> scaling phenomena in low-temperature environments is presented. While high-temperature fluids tend to deposit <span class="hlt">metal</span> <span class="hlt">sulfides</span> because of their high concentrations of dissolved <span class="hlt">metals</span> and variations of temperature, pressure and fluid chemistry, low temperature media are characterized by very low <span class="hlt">metal</span> content but much higher dissolved <span class="hlt">sulfide</span>. In the case of the goethermal wells of the Paris Basin, detailed studies demonstrate that the relatively large concentrations of chloride and dissolved <span class="hlt">sulfide</span> are responsible for corrosion and consequent formation of iron <span class="hlt">sulfide</span> scale composed of mackinawite, pyrite and pyrrhotite. The effects of the exploitation schemes are farmore » less important than the corrosion of the casings. The low-enthalpy fluids that do not originate from sedimentary aquifers (such as in Iceland and Bulgaria), have a limited corrosion potential, and the thin <span class="hlt">sulfide</span> film that appears may prevent the progress of corrosion.« less</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=5327896','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=5327896"><span>From <span class="hlt">Metal</span> Thiobenzoates to <span class="hlt">Metal</span> <span class="hlt">Sulfide</span> Nanocrystals: An Experimental and Theoretical Investigation</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Zhang, Zhihua; Lim, Wen Pei; Wong, Chiong Teck; Xu, Hairuo; Yin, Fenfang; Chin, Wee Shong</p> <p>2012-01-01</p> <p>A simple preparation of <span class="hlt">metal</span> <span class="hlt">sulfide</span> nanoparticles via the decomposition of thiobenzoate precursors at room temperature is presented and discussed. Long chain alkylamines were found to mediate the breakdown of <span class="hlt">metal</span> thiobenzoates, such as those containing Ag, Cu, In and Cd, to produce uniform Ag2S, Cu2−xS, In2S3 and CdS nanoparticles respectively. The long chain amines are assumed to play dual roles as the nucleophilic reagent and the capping agent. It was found that sizes of the nanoparticles can be controlled by changing the type of amine used, as well as the molar ratio between amine and the precursor. We performed DFT calculations on a proposed mechanism involving an initial nucleophilic addition of amine molecule onto the thiocarboxylates. The proposed reaction was also confirmed through the analysis of by-products via infrared spectroscopy. On the basis of this understanding, we propose to manipulate the stability of the precursors by coordination with suitable stabilizing groups, such that the reaction kinetics can be modified to generate different nanostructures of interest. PMID:28348299</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=173083&keyword=good+AND+poster&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50','EPA-EIMS'); return false;" href="https://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=173083&keyword=good+AND+poster&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50"><span>CATALYTIC OXIDATION OF DIMETHYL <span class="hlt">SULFIDE</span> WITH OZONE: EFFECT OF PROMOTER AND PHYSICO-CHEMICAL PROPERTIES OF <span class="hlt">METAL</span> OXIDE CATALYSTS</span></a></p> <p><a target="_blank" href="http://oaspub.epa.gov/eims/query.page">EPA Science Inventory</a></p> <p></p> <p></p> <p>This study reports improved catalytic activities and stabilities for the oxidation of dimethyl <span class="hlt">sulfide</span> (DMS), a major pollutant of pulp and paper mills. Ozone was used as an oxidant and Cu, Mo, V, Cr and Mn <span class="hlt">metal</span> oxides, and mixed <span class="hlt">metal</span> oxides support on y-alumina as catalysts ov...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/biblio/4207694','DOE-PATENT-XML'); return false;" href="https://www.osti.gov/biblio/4207694"><span>DISSOLUTION OF PLUTONIUM CONTAINING CARRIER PRECIPITATE BY CARBONATE METATHESIS AND SEPARATION OF <span class="hlt">SULFIDE</span> IMPURITIES THEREFROM BY <span class="hlt">SULFIDE</span> PRECIPITATION</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Duffield, R.B.</p> <p>1959-07-14</p> <p>A process is described for recovering plutonium from foreign products wherein a carrier precipitate of lanthanum fluoride containing plutonium is obtained and includes the steps of dissolving the carrier precipitate in an alkali <span class="hlt">metal</span> carbonate solution, adding a soluble <span class="hlt">sulfide</span>, separating the <span class="hlt">sulfide</span> precipitate, adding an alkali <span class="hlt">metal</span> hydroxide, separating the resulting precipitate, washing, and dissolving in a strong acid.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/27550218','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/27550218"><span>Biological synthesis of nanosized <span class="hlt">sulfide</span> semiconductors: current status and future prospects.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>da Costa, João Pinto; Girão, Ana Violeta; Trindade, Tito; Costa, Maria Clara; Duarte, Armando; Rocha-Santos, Teresa</p> <p>2016-10-01</p> <p>There have been extensive and comprehensive reviews in the field of <span class="hlt">metal</span> <span class="hlt">sulfide</span> precipitation in the context of environmental remediation. However, these works have focused mainly on the removal of <span class="hlt">metals</span> from aqueous solutions-usually, <span class="hlt">metal</span>-contaminated effluents-with less emphasis on the precipitation process and on the end-products, frequently centering on <span class="hlt">metal</span> removal efficiencies. Recently, there has been an increasing interest not only in the possible beneficial effects of these bioremediation strategies for <span class="hlt">metal</span>-rich effluents but also on the formed precipitates. These <span class="hlt">metal</span> <span class="hlt">sulfide</span> materials are of special relevance in industry, due to their optical, electronic, and mechanical properties. Hence, identifying new routes for synthesizing these materials, as well as developing methodologies allowing for the control of the shape and size of particulates, is of environmental, economic, and practical importance. Multiple studies have shown proof-of-concept for the biological synthesis of inorganic <span class="hlt">metallic</span> <span class="hlt">sulfide</span> nanoparticles (NPs), resorting to varied organisms or cell components, though this information has scarcely been structured and compiled in a systematic manner. In this review, we overview the biological synthesis methodologies of nanosized <span class="hlt">metal</span> <span class="hlt">sulfides</span> and the advantages of these strategies when compared to more conventional chemical routes. Furthermore, we highlight the possibility of the use of numerous organisms for the synthesis of different <span class="hlt">metal</span> <span class="hlt">sulfide</span> NPs, with emphasis on sulfate-reducing bacteria (SRB). Finally, we put in perspective the potential of these methodologies in the emerging research areas of biohydrometallurgy and nanobiotechnology for the uptake of <span class="hlt">metals</span> in the form of <span class="hlt">metal</span> <span class="hlt">sulfide</span> nanoparticles. A more complete understanding of the principles underlying the (bio)chemistry of formation of solids in these conditions may lead to the large-scale production of such <span class="hlt">metal</span> <span class="hlt">sulfides</span>, while simultaneously allowing an enhanced</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/24559093','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/24559093"><span>A lithium-ion sulfur battery <span class="hlt">based</span> on a carbon-coated lithium-<span class="hlt">sulfide</span> cathode and an electrodeposited silicon-<span class="hlt">based</span> anode.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Agostini, Marco; Hassoun, Jusef; Liu, Jun; Jeong, Moongook; Nara, Hiroki; Momma, Toshiyuki; Osaka, Tetsuya; Sun, Yang-Kook; Scrosati, Bruno</p> <p>2014-07-23</p> <p>In this paper, we report a lithium-ion battery employing a lithium <span class="hlt">sulfide</span> cathode and a silicon-<span class="hlt">based</span> anode. The high capacity of the silicon anode and the high efficiency and cycling rate of the lithium <span class="hlt">sulfide</span> cathode allowed optimal full cell balance. We show in fact that the battery operates with a very stable capacity of about 280 mAh g(-1) at an average voltage of 1.4 V. To the best of our knowledge, this battery is one of the rare examples of lithium-<span class="hlt">metal</span>-free sulfur battery. Considering the high theoretical capacity of the employed electrodes, we believe that the battery here reported may be of potential interest as high-energy, safe, and low-cost power source for electric vehicles.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/21298701','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/21298701"><span>Acid volatile <span class="hlt">sulfides</span> oxidation and <span class="hlt">metals</span> (Mn, Zn) release upon sediment resuspension: laboratory experiment and model development.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Hong, Yong Seok; Kinney, Kerry A; Reible, Danny D</p> <p>2011-03-01</p> <p>Sediment from the Anacostia River (Washington, DC, USA) was suspended in aerobic artificial river water for 14 d to investigate the dynamics of dissolved <span class="hlt">metals</span> release and related parameters including pH, acid volatile <span class="hlt">sulfides</span> (AVS), and dissolved/solid phase Fe(2+). To better understand and predict the underlying processes, a mathematical model is developed considering oxidation of reduced species, dissolution of minerals, pH changes, and pH-dependent <span class="hlt">metals</span>' sorption to sediment. Oxidation rate constants of elemental sulfur and zinc <span class="hlt">sulfide</span>, and a dissolution rate constant of carbonate minerals, were adjusted to fit observations. The proposed model and parameters were then applied, without further calibration, to literature-reported experimental observations of resuspension in an acid sulfate soil collected in a coastal flood plain. The model provided a good description of the dynamics of AVS, Fe(2+), S(0)((s)), pH, dissolved carbonates concentrations, and the release of Ca((aq)), Mg((aq)), and Zn((aq)) in both sediments. Accurate predictions of Mn((aq)) release required adjustment of sorption partitioning coefficient, presumably due to the presence of Mn scavenging by phases not accounted for in the model. The oxidation of AVS (and the resulting release of <span class="hlt">sulfide</span>-bound <span class="hlt">metals</span>) was consistent with a two-step process, a relatively rapid AVS oxidation to elemental sulfur (S(0)((s))) and a slow oxidation of S(0)((s)) to SO(4)(2-)((aq)), with an associated decrease in pH from neutral to acidic conditions. This acidification was the dominant factor for the release of <span class="hlt">metals</span> into the aqueous phase. Copyright © 2010 SETAC.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/20170008960','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/20170008960"><span>4<span class="hlt">BMS</span>-X Design and Test Activation</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Peters, Warren T.; Knox, James C.</p> <p>2017-01-01</p> <p>In support of the NASA goals to reduce power, volume and mass requirements on future CO2 (Carbon Dioxide) removal systems for exploration missions, a 4<span class="hlt">BMS</span> (Four Bed Molecular Sieve) test bed was fabricated and activated at the NASA Marshall Space Flight Center. The 4<span class="hlt">BMS</span>-X (Four Bed Molecular Sieve-Exploration) test bed used components similar in size, spacing, and function to those on the flight ISS flight CDRA system, but were assembled in an open framework. This open framework allows for quick integration of changes to components, beds and material systems. The test stand is highly instrumented to provide data necessary to anchor predictive modeling efforts occurring in parallel to testing. System architecture and test data collected on the initial configurations will be presented.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4632981','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4632981"><span>Toxic <span class="hlt">metal</span>(loid) speciation during weathering of iron <span class="hlt">sulfide</span> mine tailings under semi-arid climate</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Root, Robert A.; Hayes, Sarah M.; Hammond, Corin M.; Maier, Raina M.; Chorover, Jon</p> <p>2015-01-01</p> <p>Toxic metalliferous mine-tailings pose a significant health risk to ecosystems and neighboring communities from wind and water dispersion of particulates containing high concentrations of toxic <span class="hlt">metal</span>(loid)s (e.g., Pb, As, Zn). Tailings are particularly vulnerable to erosion before vegetative cover can be reestablished, i.e., decades or longer in semi-arid environments without intervention. <span class="hlt">Metal</span>(loid) speciation, linked directly to bioaccessibility and lability, is controlled by mineral weathering and is a key consideration when assessing human and environmental health risks associated with mine sites. At the semi-arid Iron King Mine and Humboldt Smelter Superfund site in central Arizona, the mineral assemblage of the top 2 m of tailings has been previously characterized. A distinct redox gradient was observed in the top 0.5 m of the tailings and the mineral assemblage indicates progressive transformation of ferrous iron <span class="hlt">sulfides</span> to ferrihydrite and gypsum, which, in turn weather to form schwertmannite and then jarosite accompanied by a progressive decrease in pH (7.3 to 2.3). Within the geochemical context of this reaction front, we examined enriched toxic <span class="hlt">metal</span>(loid)s As, Pb, and Zn with surficial concentrations 41.1, 10.7, 39.3 mM kg-1 (3080, 2200, and 2570 mg kg-1), respectively. The highest bulk concentrations of As and Zn occur at the redox boundary representing a 1.7 and 4.2 fold enrichment relative to surficial concentrations, respectively, indicating the translocation of toxic elements from the gossan zone to either the underlying redox boundary or the surface crust. <span class="hlt">Metal</span> speciation was also examined as a function of depth using X-ray absorption spectroscopy (XAS). The deepest sample (180 cm) contains <span class="hlt">sulfides</span> (e.g., pyrite, arsenopyrite, galena, and sphalerite). Samples from the redox transition zone (25-54 cm) contain a mixture of <span class="hlt">sulfides</span>, carbonates (siderite, ankerite, cerrusite, and smithsonite) and <span class="hlt">metal</span>(loid)s sorbed to neoformed secondary Fe</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_5");'>5</a></li> <li><a href="#" onclick='return showDiv("page_6");'>6</a></li> <li class="active"><span>7</span></li> <li><a href="#" onclick='return showDiv("page_8");'>8</a></li> <li><a href="#" onclick='return showDiv("page_9");'>9</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_7 --> <div id="page_8" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_6");'>6</a></li> <li><a href="#" onclick='return showDiv("page_7");'>7</a></li> <li class="active"><span>8</span></li> <li><a href="#" onclick='return showDiv("page_9");'>9</a></li> <li><a href="#" onclick='return showDiv("page_10");'>10</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="141"> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/15158381','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/15158381"><span>Adsorption of Pb(II), Cu(II), Cd(II), Zn(II), Ni(II), Fe(II), and As(V) on bacterially produced <span class="hlt">metal</span> <span class="hlt">sulfides</span>.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Jong, Tony; Parry, David L</p> <p>2004-07-01</p> <p>The adsorption of Pb(II), Cu(II), Cd(II), Zn(II), Ni(II), Fe(II) and As(V) onto bacterially produced <span class="hlt">metal</span> <span class="hlt">sulfide</span> (BPMS) material was investigated using a batch equilibrium method. It was found that the <span class="hlt">sulfide</span> material had adsorptive properties comparable with those of other adsorbents with respect to the specific uptake of a range of <span class="hlt">metals</span> and, the levels to which dissolved <span class="hlt">metal</span> concentrations in solution can be reduced. The percentage of adsorption increased with increasing pH and adsorbent dose, but decreased with increasing initial dissolved <span class="hlt">metal</span> concentration. The pH of the solution was the most important parameter controlling adsorption of Cd(II), Cu(II), Fe(II), Ni(II), Pb(II), Zn(II), and As(V) by BPMS. The adsorption data were successfully modeled using the Langmuir adsorption isotherm. Desorption experiments showed that the reversibility of adsorption was low, suggesting high-affinity adsorption governed by chemisorption. The mechanism of adsorption for the divalent <span class="hlt">metals</span> was thought to be the formation of strong, inner-sphere complexes involving surface hydroxyl groups. However, the mechanism for the adsorption of As(V) by BPMS appears to be distinct from that of surface hydroxyl exchange. These results have important implications to the management of <span class="hlt">metal</span> <span class="hlt">sulfide</span> sludge produced by bacterial sulfate reduction.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/21126782','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/21126782"><span>Flat panel digital detector cinefluoroscopy late following SES or <span class="hlt">BMS</span> implantation for detection of coronary stent fracture in asymptomatic patients.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Davlouros, Periklis A; Chefneux, Corina; Xanthopoulou, Ioanna; Papathanasiou, Maria; Zaharioglou, Evaggelia; Tsigkas, Grigorios; Alexopoulos, Dimitrios</p> <p>2012-05-03</p> <p>Coronary stent fracture (SF), is rare and confined mainly in patients treated with sirolimus eluting stents (SES). The role of flat panel digital detector (FPDD) fluoroscopy in detecting SF has not been investigated. Assessment with FPDD fluoroscopy of asymptomatic patients, with 200 SES (Cypher, Cordis, J&J, Miami, Florida, US), and 200 bare <span class="hlt">metal</span> stents (<span class="hlt">BMS</span>), at 45.5 ± 15.7 and 38.4 ± 3.9 months post-stenting respectively. SF was defined as discontinuity of stent struts on fluoroscopy. Coronary angiography was reserved for patients with documented SF. Effective radiation dose was 0.26 ± 0.14 mSv. SF was depicted in 6 (3%) SES, and 1 <span class="hlt">BMS</span> (0.5%). Stent length was an independent predictor of SF (OR 1.19, 95% CI 1.03-1.4, p=0.024). RCA location and vessel angulation were marginally significant (OR 7.7, 95% CI 0.8-74.2, p=0.077 and OR 5.1, 95% CI 0.8-34, p=0.089). Significant angiographic restenosis was detected in 4 SES (66.6%), and 1 <span class="hlt">BMS</span> (0.5%). Re-intervention was needed in 3 (42.8%) cases, (2 SES and 1 <span class="hlt">BMS</span>). Detection of SF with FPDD cinefluoroscopy late following coronary stenting is feasible, involves low radiation and is confined mainly to SES compared to <span class="hlt">BMS</span>. Application of cinefluoroscopy as part of a routine stent surveillance programme in asymptomatic patients may be more appropriate in "high risk" settings (SES, long stents and adverse angiographic characteristics). The role of invasive imaging and subsequent management of such patients need further studying. Copyright © 2010 Elsevier Ireland Ltd. All rights reserved.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/biblio/264565','DOE-PATENT-XML'); return false;" href="https://www.osti.gov/biblio/264565"><span>Transition-<span class="hlt">metal</span> doped <span class="hlt">sulfide</span>, selenide, and telluride laser crystal and lasers</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Krupke, W.F.; Page, R.H.; DeLoach, L.D.; Payne, S.A.</p> <p>1996-07-30</p> <p>A new class of solid state laser crystals and lasers are formed of transition <span class="hlt">metal</span> doped <span class="hlt">sulfide</span>, selenide, and telluride host crystals which have four fold coordinated substitutional sites. The host crystals include II-VI compounds. The host crystal is doped with a transition <span class="hlt">metal</span> laser ion, e.g., chromium, cobalt or iron. In particular, Cr{sup 2+}-doped ZnS and ZnSe generate laser action near 2.3 {micro}m. Oxide, chloride, fluoride, bromide and iodide crystals with similar structures can also be used. Important aspects of these laser materials are the tetrahedral site symmetry of the host crystal, low excited state absorption losses and high luminescence efficiency, and the d{sup 4} and d{sup 6} electronic configurations of the transition <span class="hlt">metal</span> ions. The same materials are also useful as saturable absorbers for passive Q-switching applications. The laser materials can be used as gain media in amplifiers and oscillators; these gain media can be incorporated into waveguides and semiconductor lasers. 18 figs.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/servlets/purl/870540','DOE-PATENT-XML'); return false;" href="https://www.osti.gov/servlets/purl/870540"><span>Transition-<span class="hlt">metal</span> doped <span class="hlt">sulfide</span>, selenide, and telluride laser crystal and lasers</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Krupke, William F.; Page, Ralph H.; DeLoach, Laura D.; Payne, Stephen A.</p> <p>1996-01-01</p> <p>A new class of solid state laser crystals and lasers are formed of transition <span class="hlt">metal</span> doped <span class="hlt">sulfide</span>, selenide, and telluride host crystals which have four fold coordinated substitutional sites. The host crystals include II-VI compounds. The host crystal is doped with a transition <span class="hlt">metal</span> laser ion, e.g., chromium, cobalt or iron. In particular, Cr.sup.2+ -doped ZnS and ZnSe generate laser action near 2.3 .mu.m. Oxide, chloride, fluoride, bromide and iodide crystals with similar structures can also be used. Important aspects of these laser materials are the tetrahedral site symmetry of the host crystal, low excited state absorption losses and high luminescence efficiency, and the d.sup.4 and d.sup.6 electronic configurations of the transition <span class="hlt">metal</span> ions. The same materials are also useful as saturable absorbers for passive Q-switching applications. The laser materials can be used as gain media in amplifiers and oscillators; these gain media can be incorporated into waveguides and semiconductor lasers.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/biblio/1353260-discovery-gram-scale-synthesis-bms-potent-selective-fviia-inhibitor','SCIGOV-STC'); return false;" href="https://www.osti.gov/biblio/1353260-discovery-gram-scale-synthesis-bms-potent-selective-fviia-inhibitor"><span>Discovery and gram-scale synthesis of <span class="hlt">BMS</span>-593214, a potent, selective FVIIa inhibitor</span></a></p> <p><a target="_blank" href="http://www.osti.gov/search">DOE Office of Scientific and Technical Information (OSTI.GOV)</a></p> <p>Priestley, E. Scott; De Lucca, Indawati; Zhou, Jinglan</p> <p></p> <p>A 6-amidinotetrahydroquinoline screening hit was driven to a structurally novel, potent, and selective FVIIa inhibitor through a combination of library synthesis and rational design. An efficient gram-scale synthesis of the active enantiomer <span class="hlt">BMS</span>-593214 was developed, which required significant optimization of the key Povarov annulation. Importantly, <span class="hlt">BMS</span>-593214 showed antithrombotic efficacy in a rabbit arterial thrombosis model. A crystal structure of <span class="hlt">BMS</span>-593214 bound to FVIIa highlights key contacts with Asp 189, Lys 192, and the S2 pocket.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/27422050','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/27422050"><span>Mechanochemical processing of molybdenum and vanadium <span class="hlt">sulfides</span> for <span class="hlt">metal</span> recovery from spent catalysts wastes.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Li, Zhao; Chen, Min; Zhang, Qiwu; Liu, Xinzhong; Saito, Fumio</p> <p>2017-02-01</p> <p>This work describes the mechanochemical transformations of molybdenum and vanadium <span class="hlt">sulfides</span> into corresponding molybdate and vanadate, to serve as a new environment-friendly approach for processing hazardous spent hydrodesulphurization (HDS) catalysts solid waste to achieve an easy recovery of not only molybdenum and vanadium but also nickel and cobalt. Co-grinding the molybdenum and vanadium <span class="hlt">sulfides</span> with oxidants and sodium carbonate stimulates solid-state reactions without any heating aid to form <span class="hlt">metal</span> molybdates and vanadates. The reactions proceed with an increase in grinding time and were enhanced by using more sodium carbonate and stronger oxidant. The necessary conditions for the successful transformation can be explained on the basis of thermodynamic analyses, namely a negative change in Gibbs free energy. Copyright © 2016 Elsevier Ltd. All rights reserved.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://ntrs.nasa.gov/search.jsp?R=20050186820&hterms=satisfaction&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D90%26Ntt%3Dsatisfaction','NASA-TRS'); return false;" href="https://ntrs.nasa.gov/search.jsp?R=20050186820&hterms=satisfaction&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D90%26Ntt%3Dsatisfaction"><span>Manufacturing <span class="hlt">Bms</span>/Iso System Review</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Gomez, Yazmin</p> <p>2004-01-01</p> <p>The Quality Management System (QMS) is one that recognizes the need to continuously change and improve an organization s products and services as determined by system feedback, and corresponding management decisions. The purpose of a Quality Management System is to minimize quality variability of an organization's products and services. The optimal Quality Management System balances the need for an organization to maintain flexibility in the products and services it provides with the need for providing the appropriate level of discipline and control over the processes used to provide them. The goal of a Quality Management System is to ensure the quality of the products and services while consistently (through minimizing quality variability) meeting or exceeding customer expectations. The GRC Business Management System (<span class="hlt">BMS</span>) is the foundation of the Center's ISO 9001:2000 registered quality system. ISO 9001 is a quality system model developed by the International Organization for Standardization. <span class="hlt">BMS</span> supports and promote the Glenn Research Center Quality Policy and wants to ensure the customer satisfaction while also meeting quality standards. My assignment during this summer is to examine the manufacturing processes used to develop research hardware, which in most cases are one of a kind hardware, made with non conventional equipment and materials. During this process of observation I will make a determination, <span class="hlt">based</span> on my observations of the hardware development processes the best way to meet customer requirements and at the same time achieve the GRC quality standards. The purpose of my task is to review the manufacturing processes identifying opportunities in which to optimize the efficiency of the processes and establish a plan for implementation and continuous improvement.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2017GeCoA.216..184F','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2017GeCoA.216..184F"><span>Fractionation of rhenium from osmium during noble <span class="hlt">metal</span> alloy formation in association with <span class="hlt">sulfides</span>: Implications for the interpretation of model ages in alloy-bearing magmatic rocks</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Fonseca, Raúl O. C.; Brückel, Karoline; Bragagni, Alessandro; Leitzke, Felipe P.; Speelmanns, Iris M.; Wainwright, Ashlea N.</p> <p>2017-11-01</p> <p>Although Earth's continental crust is thought to derive from melting of the Earth's mantle, how the crust has formed and the timing of its formation are not well understood. The main difficulty in understanding how the crust was extracted from the Earth's mantle is that most isotope systems recorded in mantle rocks have been disturbed by crustal recycling, metasomatic activity and dilution of the signal by mantle convection. In this regard, important age constraints can be obtained from Re-Os model ages in platinum group minerals (PGM), as Re-poor and Os-rich PGM show evidence of melting events up to 4.1 Ga. To constrain the origin of the Re-Os fractionation and Os isotope systematics of natural PGM, we have investigated the linkage between <span class="hlt">sulfide</span> and PGM grains of variable composition via a series of high-temperature experiments carried out at 1 bar. We show that with the exception of laurite, all experimentally-produced PGM, in particular Pt3Fe (isoferroplatinum) and Pt-Ir <span class="hlt">metal</span> grains, are systematically richer in Re than their <span class="hlt">sulfide</span> precursors and will develop radiogenic 187Os /188Os signatures over time relative to their host <span class="hlt">base</span> <span class="hlt">metal</span> <span class="hlt">sulfides</span>. Cooling of an PGM-saturated <span class="hlt">sulfide</span> assemblage shows a tendency to amplify the extent of Re-Os fractionation between PGM and the different <span class="hlt">sulfide</span> phases present during cooling. Conversely, laurite grains (RuS2) are shown to accept little to no Re in them and their Os isotope composition changes little over time as a result. Laurite is therefore the PGM that provides the most robust Re-depletion ages in mantle lithologies. Our results are broadly consistent with observations made on natural PGM, where laurites are systematically less radiogenic than Pt-rich PGM. These experimental results highlight the need for the acquisition of large datasets for both mantle materials and ophiolite-derived detrital grains that include measurements of the Os isotope composition of minerals rich in highly siderophile elements at</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/27535150','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/27535150"><span>Assessing pollution in a Mediterranean lagoon using acid volatile <span class="hlt">sulfides</span> and estimations of simultaneously extracted <span class="hlt">metals</span>.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Zaaboub, Noureddine; Helali, Mohamed Amine; Martins, Maria Virgínia Alves; Ennouri, Rym; Béjaoui, Béchir; da Silva, Eduardo Ferreira; El Bour, Monia; Aleya, Lotfi</p> <p>2016-11-01</p> <p>Bizerte Lagoon is a southern Mediterranean semi-enclosed lagoon with a maximum depth of 12 m. After assessing sediment quality, the authors report on the physicochemical characteristics of the lagoon's surface sediment using SEM (simultaneously extracted <span class="hlt">metals</span>) and AVS (acid volatile <span class="hlt">sulfides</span>) as proxies. Biogeochemical tools are used to investigate the environmental disturbance at the water-sediment interface by means of SEM and AVS to seek conclusions concerning the study area's pollution status. Results confirm accumulation of trace elements in sediment. The use of the SEM-AVS model with organic matter in sediment (ƒOC) confirms possible bioavailability of accumulated trace elements, especially Zn, in the southern part of the lagoon, with organic matter playing an important role in SEM excess correction to affirm a nontoxic total <span class="hlt">metal</span> sediment state. Individual trace element toxicity is dependent on the bioavailable fraction of SEM <span class="hlt">Metal</span> on sediment, as is the influence of lagoon inflow from southern water sources on element bioavailability. Appropriate management strategies are highly recommended to mitigate any potential harmful effects on health from this heavy-<span class="hlt">metal-based</span> pollution.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2015EGUGA..1713768N','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2015EGUGA..1713768N"><span>Prevention of <span class="hlt">sulfide</span> oxidation in <span class="hlt">sulfide</span>-rich waste rock</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Nyström, Elsa; Alakangas, Lena</p> <p>2015-04-01</p> <p>The ability to reduce <span class="hlt">sulfide</span> oxidation in waste rock after mine closure is a widely researched area, but to reduce and/or inhibit the oxidation during operation is less common. <span class="hlt">Sulfide</span>-rich (ca 30 % sulfur) waste rock, partially oxidized, was leached during unsaturated laboratory condition. Trace elements such as As and Sb were relatively high in the waste rock while other <span class="hlt">sulfide</span>-associated elements such as Cu, Pb and Zn were low compared to common <span class="hlt">sulfide</span>-rich waste rock. Leaching of unsaturated waste rock lowered the pH, from around six down to two, resulting in continuously increasing element concentrations during the leaching period of 272 days. The concentrations of As (65 mg/L), Cu (6.9 mg/L), Sb (1.2 mg/L), Zn (149 mg/L) and S (43 g/L) were strongly elevated at the end of the leaching period. Different alkaline industrial residues such as slag, lime kiln dust and cement kiln dust were added as solid or as liquid to the waste rock in an attempt to inhibit <span class="hlt">sulfide</span> oxidation through neo-formed phases on <span class="hlt">sulfide</span> surfaces in order to decrease the mobility of <span class="hlt">metals</span> and metalloids over longer time scale. This will result in a lower cost and efforts of measures after mine closure. Results from the experiments will be presented.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/1999CoMP..134..174B','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/1999CoMP..134..174B"><span>Chromatographic separation of the platinum-group elements, gold, <span class="hlt">base</span> <span class="hlt">metals</span> and sulfur during degassing of a compacting and solidifying igneous crystal pile</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Boudreau, A. E.; Meurer, W. P.</p> <p></p> <p>The major platinum-group elements (PGE) concentrations in layered intrusions are typically associated with zones in which the <span class="hlt">sulfide</span> abundance begins to increase. In a number of layered intrusions, there is also a distinct stratigraphic separation in the peak concentrations of the PGE from those of the <span class="hlt">base</span> <span class="hlt">metals</span>, gold and sulfur through these zones. These stratigraphic ``offsets'' are characterized by a lower, typically S-poor, Pt- and Pd-enriched zone overlain by a zone enriched in the <span class="hlt">base</span> <span class="hlt">metals</span>, S and Au. The separations amount to a few decimeters to several tens of meters. In some instances, the high Pt and Pd concentrations are associated with trivial amounts of <span class="hlt">sulfide</span>. Theoretical considerations suggest that these offsets can be modeled as chromatographic peaks that develop during an infiltration/reaction process. Using Pd as a typical PGE and Cu as a typical <span class="hlt">base</span> <span class="hlt">metal</span>, a numeric model is developed that illustrates how <span class="hlt">metal</span> separations can develop in a vapor-refining zone as fluid evolved during solidification of a cumulus pile leaches <span class="hlt">sulfide</span> and redeposits it higher in the crystal pile. The solidification/degassing ore-element transport is coupled with a compaction model for the crystal pile. Solidification resulting from conductive cooling through the <span class="hlt">base</span> of the compacting column leads to an increasing volatile concentration in the intercumulus liquid until it reaches fluid saturation. Separation and upward migration of this fluid lead to an upward-migrating zone of increasingly higher bulk water contents as water degassed from underlying cumulates enriches overlying, fluid-undersaturated interstitial liquids. <span class="hlt">Sulfide</span> is resorbed from the degassing regions and is reprecipitated in these vapor-undersaturated interstitial liquids, producing a zone of relatively high modal <span class="hlt">sulfide</span> that also migrates upward with time. Owing to its strong preference for <span class="hlt">sulfide</span>, Pd is not significantly mobile until all <span class="hlt">sulfide</span> is resorbed. The result is a zone of</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/29421105','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/29421105"><span>Are acid volatile <span class="hlt">sulfides</span> (AVS) important trace <span class="hlt">metals</span> sinks in semi-arid mangroves?</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Queiroz, Hermano Melo; Nóbrega, Gabriel Nuto; Otero, Xose L; Ferreira, Tiago Osório</p> <p>2018-01-01</p> <p>Acid-volatile <span class="hlt">sulfides</span> (AVS) formation and its role on trace <span class="hlt">metals</span> bioavailability were studied in semi-arid mangroves. The semi-arid climatic conditions at the studied sites, marked by low rainfall and high evapotranspiration rates, clearly limited the AVS formation (AVS contents varied from 0.10 to 2.34μmolg -1 ) by favoring oxic conditions (Eh>+350mV). The AVS contents were strongly correlated with reactive iron and organic carbon (r=0.84; r=0.83 respectively), evidencing their dominant role for AVS formation under semi-arid conditions. On the other hand, the recorded ΣSEM/AVS values remained >1 evidencing a little control of AVS over the bioavailability of trace <span class="hlt">metals</span> and, thus, its minor role as a sink for toxic <span class="hlt">metals</span>. Copyright © 2017 Elsevier Ltd. All rights reserved.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/27783528','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/27783528"><span>Transition-<span class="hlt">Metal</span>-Free Diarylannulated <span class="hlt">Sulfide</span> and Selenide Construction via Radical/Anion-Mediated Sulfur-Iodine and Selenium-Iodine Exchange.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Wang, Ming; Fan, Qiaoling; Jiang, Xuefeng</p> <p>2016-11-04</p> <p>A facile, straightforward protocol was established for diarylannulated <span class="hlt">sulfide</span> and selenide construction through S-I and Se-I exchange without transition <span class="hlt">metal</span> assistance. Elemental sulfur and selenium served as the chalcogen source. Diarylannulated <span class="hlt">sulfides</span> were systematically achieved from a five- to eight-membered ring. A trisulfur radical anion was demonstrated as the initiator for this radical process via electron paramagnetic resonance (EPR) study. OFET molecules [1]benzothieno[3,2-b][1]benzothiophene (BTBT) and [1]benzothieno[3,2-b][1]benzoselenophene (BTBS) were efficiently established.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4225550','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4225550"><span>Platinum-Free Counter Electrode Comprised of <span class="hlt">Metal</span>-Organic-Framework (MOF)-Derived Cobalt <span class="hlt">Sulfide</span> Nanoparticles for Efficient Dye-Sensitized Solar Cells (DSSCs)</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Hsu, Shao-Hui; Li, Chun-Ting; Chien, Heng-Ta; Salunkhe, Rahul R.; Suzuki, Norihiro; Yamauchi, Yusuke; Ho, Kuo-Chuan; Wu, Kevin C.-W.</p> <p>2014-01-01</p> <p>We fabricated a highly efficient (with a solar-to-electricity conversion efficiency (η) of 8.1%) Pt-free dye-sensitized solar cell (DSSC). The counter electrode was made of cobalt <span class="hlt">sulfide</span> (CoS) nanoparticles synthesized via surfactant-assisted preparation of a <span class="hlt">metal</span> organic framework, ZIF-67, with controllable particle sizes (50 to 320 nm) and subsequent oxidation and <span class="hlt">sulfide</span> conversion. In contrast to conventional Pt counter electrodes, the synthesized CoS nanoparticles exhibited higher external surface areas and roughness factors, as evidenced by X-ray diffraction (XRD), scanning electron microscopy (SEM) element mapping, and electrochemical analysis. Incident photon-to-current conversion efficiency (IPCE) results showed an increase in the open circuit voltage (VOC) and a decrease in the short-circuit photocurrent density (Jsc) for CoS-<span class="hlt">based</span> DSSCs compared to Pt-<span class="hlt">based</span> DSSCs, resulting in a similar power conversion efficiency. The CoS-<span class="hlt">based</span> DSSC fabricated in the study show great potential for economically friendly production of Pt-free DSSCs. PMID:25382139</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/19940031640','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/19940031640"><span>Preliminary results of <span class="hlt">sulfide</span> melt/silicate wetting experiments in a partially melted ordinary chondrite</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Jurewicz, Stephen R.; Jones, John H.</p> <p>1994-01-01</p> <p>Recently, mechanisms for core formation in planetary bodies have received considerable attention. Most current theories emphasize the need for large degrees of silicate partial melting to facilitate the coalescence and sinking of <span class="hlt">sulfide-metal</span> liquid blebs through a low strength semi-crystalline silicate mush. This scenario is <span class="hlt">based</span> upon observations that <span class="hlt">sulfide-metal</span> liquid tends to form circular blebs in partially molten meteorites during laboratory experiments. However, recent experimental work by Herpfer and Larimer indicates that some <span class="hlt">sulfide</span>-Fe liquids have wetting angles at and slightly below 60 deg in an olivine aggregate, implying an interconnected melt structure at any melt fraction. Such melt interconnectivity provides a means for gravitational compaction and extraction of the majority of a <span class="hlt">sulfide</span> liquid phase in small planetary bodies without invoking large degrees of silicate partial melting. Because of the important ramifications of these results, we conducted a series of experiments using H-chondrite starting material in order to evaluate <span class="hlt">sulfide</span>-liquid/silicate wetting behavior in a more complex natural system.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/biblio/22584231-catalytic-dehydrogenation-alcohol-over-solid-state-molybdenum-sulfide-clusters-octahedral-metal-framework','SCIGOV-STC'); return false;" href="https://www.osti.gov/biblio/22584231-catalytic-dehydrogenation-alcohol-over-solid-state-molybdenum-sulfide-clusters-octahedral-metal-framework"><span>Catalytic dehydrogenation of alcohol over solid-state molybdenum <span class="hlt">sulfide</span> clusters with an octahedral <span class="hlt">metal</span> framework</span></a></p> <p><a target="_blank" href="http://www.osti.gov/search">DOE Office of Scientific and Technical Information (OSTI.GOV)</a></p> <p>Kamiguchi, Satoshi, E-mail: kamigu@riken.jp; Organometallic Chemistry Laboratory, RIKEN, 2-1 Hirosawa, Wako City, Saitama 351-0198; Okumura, Kazu</p> <p></p> <p>Graphical abstract: - Highlights: • Solid-state molybdenum <span class="hlt">sulfide</span> clusters catalyzed the dehydrogenation of alcohol. • The dehydrogenation proceeded without the addition of any oxidants. • The catalytic activity developed when the cluster was activated at 300–500 °C in H{sub 2}. • The Lewis-acidic molybdenum atom and basic sulfur ligand were catalytically active. • The clusters function as bifunctional acid–<span class="hlt">base</span> catalysts. - Abstract: Solid-state molybdenum <span class="hlt">sulfide</span> clusters with an octahedral <span class="hlt">metal</span> framework, the superconducting Chevrel phases, are applied to catalysis. A copper salt of a nonstoichiometric sulfur-deficient cluster, Cu{sub x}Mo{sub 6}S{sub 8–δ} (x = 2.94 and δ ≈ 0.3), is storedmore » in air for more than 90 days. When the oxygenated cluster is thermally activated in a hydrogen stream above 300 °C, catalytic activity for the dehydrogenation of primary alcohols to aldehydes and secondary alcohols to ketones develops. The addition of pyridine or benzoic acid decreases the dehydrogenation activity, indicating that both a Lewis-acidic coordinatively unsaturated molybdenum atom and a basic sulfur ligand synergistically act as the catalytic active sites.« less</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2015CoMP..170...53H','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2015CoMP..170...53H"><span>Extreme enrichment of Se, Te, PGE and Au in Cu <span class="hlt">sulfide</span> microdroplets: evidence from LA-ICP-MS analysis of <span class="hlt">sulfides</span> in the Skaergaard Intrusion, east Greenland</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Holwell, David A.; Keays, Reid R.; McDonald, Iain; Williams, Megan R.</p> <p>2015-12-01</p> <p>The Platinova Reef, in the Skaergaard Intrusion, east Greenland, is an example of a magmatic Cu-PGE-Au <span class="hlt">sulfide</span> deposit formed in the latter stages of magmatic differentiation. As is characteristic with such deposits, it contains a low volume of <span class="hlt">sulfide</span>, displays peak <span class="hlt">metal</span> offsets and is Cu rich but Ni poor. However, even for such deposits, the Platinova Reef contains extremely low volumes of <span class="hlt">sulfide</span> and the highest Pd and Au tenor <span class="hlt">sulfides</span> of any magmatic ore deposit. Here, we present the first LA-ICP-MS analyses of <span class="hlt">sulfide</span> microdroplets from the Platinova Reef, which show that they have the highest Se concentrations (up to 1200 ppm) and lowest S/Se ratios (190-700) of any known magmatic <span class="hlt">sulfide</span> deposit and have significant Te enrichment. In addition, where <span class="hlt">sulfide</span> volume increases, there is a change from high Pd-tenor microdroplets trapped in situ to larger, low tenor <span class="hlt">sulfides</span>. The transition between these two <span class="hlt">sulfide</span> regimes is marked by sharp peaks in Au, and then Te concentration, followed by a wider peak in Se, which gradually decreases with height. Mineralogical evidence implies that there is no significant post-magmatic hydrothermal S loss and that the <span class="hlt">metal</span> profiles are essentially a function of magmatic processes. We propose that to generate these extreme precious and semimetal contents, the <span class="hlt">sulfides</span> must have formed from an anomalously <span class="hlt">metal</span>-rich package of magma, possibly formed via the dissolution of a previously PGE-enriched <span class="hlt">sulfide</span>. Other processes such as kinetic diffusion may have also occurred alongside this to produce the ultra-high tenors. The characteristic <span class="hlt">metal</span> offset pattern observed is largely controlled by partitioning effects, producing offset peaks in the order Pt+Pd>Au>Te>Se>Cu that are entirely consistent with published D values. This study confirms that extreme enrichment in <span class="hlt">sulfide</span> droplets can occur in closed-system layered intrusions in situ, but this will characteristically form ore deposits that are so low in <span class="hlt">sulfide</span> that they do</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2018JSSCh.257...19L','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2018JSSCh.257...19L"><span>Structure of Li5AlS4 and comparison with other lithium-containing <span class="hlt">metal</span> <span class="hlt">sulfides</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Lim, Hanjin; Kim, Sung-Chul; Kim, Jaegyeom; Kim, Young-Il; Kim, Seung-Joo</p> <p>2018-01-01</p> <p>Lithium aluminum <span class="hlt">sulfide</span> (Li5AlS4) was synthesized by solid state reaction, and its crystal structure was characterized by ab initio structure determination on the basis of powder neutron diffraction (ND) data. Li5AlS4 was found to have monoclinic unit cell (space group, P21/m) with the lattice parameters: a = 6.8583(4) Å, b = 7.8369(4) Å, c = 6.2488(4) Å, and β = 90.333(4)°. This structure is built from a hexagonal close-packed (hcp) arrangement of sulfur atoms with a stacking sequence of …ABAB…. The hcp <span class="hlt">sulfide</span> lattice consists of two different double-<span class="hlt">sulfide</span> layers alternately stacked along the c-axis. Between the first pair of sulfur layers all the tetrahedral interstices (T+ and T- sites) are filled with lithium and aluminum atoms. All octahedral interstices between the second pair of sulfur layers are occupied by the remaining lithium atoms. The structure of Li5AlS4 is compared with those of various lithium-containing <span class="hlt">metal</span> <span class="hlt">sulfides</span> like Li2FeS2, NaLiMS2 (M = Zn, Cd), Li4GeS4, LiM‧S2 (M‧ = Al, Ga, In) and γ-Li3PS4. Each <span class="hlt">sulfide</span> represents a specific distribution of lithium atoms in the lattice depending on how the octahedral and tetrahedral interstitial sites are filled. The low ionic conductivity of Li5AlS4 (9.7 × 10-9 S cm-1 at 323 K) relative to other <span class="hlt">sulfides</span> may be due to the highly-ordered distribution of the lithium atoms in the layered structure and the lack of adjacent void spaces that can be used for lithium ion hopping.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2017M%26PS...52.2193S','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2017M%26PS...52.2193S"><span>Compositions and microstructures of CB <span class="hlt">sulfides</span>: Implications for the thermal history of the CB chondrite parent body</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Srinivasan, Poorna; Jones, Rhian H.; Brearley, Adrian J.</p> <p>2017-10-01</p> <p>We studied textures and compositions of <span class="hlt">sulfide</span> inclusions in unzoned Fe,Ni <span class="hlt">metal</span> particles within CBa Gujba, CBa Weatherford, CBb HH 237, and CBb QUE 94411 in order to constrain formation conditions and secondary thermal histories on the CB parent body. Unzoned <span class="hlt">metal</span> particles in all four chondrites have very similar <span class="hlt">metal</span> and <span class="hlt">sulfide</span> compositions. <span class="hlt">Metal</span> particles contain different types of <span class="hlt">sulfides</span>, which we categorize as: homogeneous low-Cr <span class="hlt">sulfides</span> composed of troilite, troilite-containing exsolved daubreelite lamellae, arcuate <span class="hlt">sulfides</span> that occur along <span class="hlt">metal</span> grain boundaries, and shock-melted <span class="hlt">sulfides</span> composed of a mixture of troilite and Fe, Ni <span class="hlt">metal</span>. Our model for formation proposes that the unzoned <span class="hlt">metal</span> particles were initially <span class="hlt">metal</span> droplets that formed from splashing by a partially molten impacting body. <span class="hlt">Sulfide</span> inclusions later formed as a result of precipitation of excess S from solid <span class="hlt">metal</span> at low temperatures, either during single stage cooling or during a reheating event by impacts. <span class="hlt">Sulfides</span> containing exsolution lamellae record temperatures of ≪600 °C, and irregular Fe-FeS intergrowth textures suggest localized shock melting, both of which are indicative of heterogeneous heating by impact processes on the CB parent body. Our study shows that CBa and CBb chondrites formed in a similar environment, and also experienced similar secondary impact processing.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/25706223','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/25706223"><span>Magnetic <span class="hlt">sulfide</span>-modified nanoscale zerovalent iron (S-nZVI) for dissolved <span class="hlt">metal</span> ion removal.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Su, Yiming; Adeleye, Adeyemi S; Keller, Arturo A; Huang, Yuxiong; Dai, Chaomeng; Zhou, Xuefei; Zhang, Yalei</p> <p>2015-05-01</p> <p><span class="hlt">Sulfide</span>-modified nanoscale zerovalent iron (S-nZVI) is attracting a lot of attention due to its ease of production and high reactivity with organic pollutants. However, its structure is still poorly understood and its potential application in heavy <span class="hlt">metal</span> remediation has not been explored. Herein, the structure of S-nZVI and its cadmium (Cd) removal performance under different aqueous conditions were carefully investigated. Transmission electron microscopy (TEM) with an energy-dispersive X-ray spectroscopy (EDS) analysis suggested that sulfur was incorporated into the zerovalent iron core. Scanning electron microscopy (SEM) with EDS analysis demonstrated that sulfur was also homogeneously distributed within the nanoparticles. When the concentration of Na2S2O4 was increased during synthesis, a flake-like structure (FeSx) increased significantly. S-nZVI had an optimal Cd removal capacity of 85 mg/g, which was >100% higher than for pristine nZVI. Even at pH 5, over 95% removal efficiency was observed, indicating <span class="hlt">sulfide</span> compounds played a crucial role in <span class="hlt">metal</span> ion removal and particle chemical stability. Oxygen impaired the structure of S-nZVI but enhanced Cd removal capacity to about 120 mg/g. Particle aging had no negative effect on removal capacity of S-nZVI, and Cd-containing mixtures remained stable in a two months experiment. S-nZVI can efficiently sequester dissolved <span class="hlt">metal</span> ions from different contaminated water matrices. Copyright © 2015 Elsevier Ltd. All rights reserved.</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_6");'>6</a></li> <li><a href="#" onclick='return showDiv("page_7");'>7</a></li> <li class="active"><span>8</span></li> <li><a href="#" onclick='return showDiv("page_9");'>9</a></li> <li><a href="#" onclick='return showDiv("page_10");'>10</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_8 --> <div id="page_9" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_7");'>7</a></li> <li><a href="#" onclick='return showDiv("page_8");'>8</a></li> <li class="active"><span>9</span></li> <li><a href="#" onclick='return showDiv("page_10");'>10</a></li> <li><a href="#" onclick='return showDiv("page_11");'>11</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="161"> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/27662632','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/27662632"><span>Impact of stent diameter and length on in-stent restenosis after DES vs <span class="hlt">BMS</span> implantation in patients needing large coronary stents-A clinical and health-economic evaluation.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Zbinden, Rainer; von Felten, Stefanie; Wein, Bastian; Tueller, David; Kurz, David J; Reho, Ivano; Galatius, Soren; Alber, Hannes; Conen, David; Pfisterer, Matthias; Kaiser, Christoph; Eberli, Franz R</p> <p>2017-02-01</p> <p>The British National Institute of Clinical Excellence (NICE) guidelines recommend to use drug-eluting stents (DES) instead of bare-<span class="hlt">metal</span> stents (<span class="hlt">BMS</span>) only in lesions >15 mm in length or in vessels <3 mm in diameter. We analyzed the impact of stent length and stent diameter on in-stent restenosis (ISR) in the BASKET-PROVE study population and evaluated the cost-effectiveness of DES compared to <span class="hlt">BMS</span>. The BASKET-PROVE trial compared DES vs <span class="hlt">BMS</span> in large coronary arteries (≥3 mm). We calculated incremental cost-effectiveness ratios (ICERs) and cost-effectiveness acceptability curves with regard to quality-adjusted life years (QALYs) gained and target lesion revascularizations (TLRs) avoided. A total of 2278 patients were included in the analysis. A total of 74 ISR in 63 patients were observed. In-stent restenosis was significantly more frequent in segments treated with a <span class="hlt">BMS</span> compared to segments treated with a DES (5.4% vs 0.76%; P<.001). The benefit of a DES compared to a <span class="hlt">BMS</span> regarding ISR was consistent among the subgroups of stent length >15 mm and ≤15 mm, respectively. With the use of DES in short lesions, there was only a minimal gain of 0.005 in QALYs. At a threshold of 10 000 CHF per TLR avoided, DES had a high probability of being cost-effective. In the BASKET-PROVE study population, the strongest predictor of ISR is the use of a <span class="hlt">BMS</span>, even in patients in need of stents ≥3.0 mm and ≤15 mm lesion length and DES were cost-effective. This should prompt the NICE to reevaluate its recommendation to use DES instead of <span class="hlt">BMS</span> only in vessels <3.0 mm and lesions >15 mm length. © 2016 John Wiley & Sons Ltd.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/25435245','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/25435245"><span>In situ solvothermal growth of <span class="hlt">metal</span>-organic framework-5 supported on porous copper foam for noninvasive sampling of plant volatile <span class="hlt">sulfides</span>.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Hu, Yuling; Lian, Haixian; Zhou, Langjun; Li, Gongke</p> <p>2015-01-06</p> <p>The present study reported on an in situ solvothermal growth method for immobilization of <span class="hlt">metal</span>-organic framework MOF-5 on porous copper foam support for enrichment of plant volatile <span class="hlt">sulfides</span>. The porous copper support impregnated with mother liquor of MOF-5 anchors the nucleation and growth of MOF crystallites at its surface, and its architecture of the three-dimensional channel enables accommodation of the MOF-5 crystallite seed. A continuous and well-intergrown MOF-5 layer, evidenced from scanning electron microscope imaging and X-ray diffraction, was successfully immobilized on the porous <span class="hlt">metal</span> bar with good adhesion and high stability. Results show that the resultant MOF-5 coating was thermally stable up to 420 °C and robust enough for replicate extraction for at least 200 times. The MOF-5 bar was then applied to the headspace sorptive extraction of the volatile organic sulfur compounds in Chinese chive and garlic sprout in combination with thermal desorption-gas chromatography/mass spectrometry. It showed high extraction sensitivity and good selectivity to these plant volatile <span class="hlt">sulfides</span> owing to the extraordinary porosity of the <span class="hlt">metal</span>-organic framework as well as the interaction between the S-donor sites and the surface cations at the crystal edges. Several primary sulfur volatiles containing allyl methyl <span class="hlt">sulfide</span>, dimethyl disulfide, diallyl <span class="hlt">sulfide</span>, methyl allyl disulfide, and diallyl disulfide were quantified. Their limits of detection were found to be in the range of 0.2-1.7 μg/L. The organic <span class="hlt">sulfides</span> were detected in the range of 6.0-23.8 μg/g with recoveries of 76.6-100.2% in Chinese chive and 11.4-54.6 μg/g with recoveries of 77.1-99.8% in garlic sprout. The results indicate the immobilization of MOF-5 on copper foam provides an efficient enrichment formats for noninvasive sampling of plant volatiles.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://pubs.er.usgs.gov/publication/70194789','USGSPUBS'); return false;" href="https://pubs.er.usgs.gov/publication/70194789"><span>Intermediate <span class="hlt">sulfidation</span> type <span class="hlt">base</span> <span class="hlt">metal</span> mineralization at Aliabad-Khanchy, Tarom-Hashtjin metallogenic belt, NW Iran</span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Kouhestani, Hossein; Mokhtari, Mir Ali Asghar; Chang, Zhaoshan; Johnson, Craig A.</p> <p>2018-01-01</p> <p>The Aliabad-Khanchy epithermal <span class="hlt">base</span> <span class="hlt">metal</span> deposit is located in the Tarom-Hashtjin metallogenic belt (THMB) of northwest Iran. The mineralization occurs as Cu-bearing brecciated quartz veins hosted by Eocene volcanic and volcaniclastic rocks of the Karaj Formation. Ore formation can be divided into five stages, with most ore minerals, such as pyrite and chalcopyrite being formed in the early stages. The main wall-rock alteration is silicification, and chlorite, argillic and propylitic alteration. Microthermometric measurements of fluid inclusion assemblages show that the ore-forming fluids have eutectic temperatures between −30 and −52 °C, trapping temperatures of 150–290 °C, and salinities of 6.6–12.4 wt% NaCl equiv. These data demonstrate that the ore-forming fluids were medium- to high-temperature, medium- to low-salinity, and low-density H2O–NaCl–CaCl2 fluids. Calculated δ18O values indicate that ore-forming hydrothermal fluids had δ18Owater ranging from +3.6‰ to +0.8‰, confirming that the ore–fluid system evolved from dominantly magmatic to dominantly meteoric. The calculated 34SH2S values range from −8.1‰ to −5.0‰, consistent with derivation of the sulfur from either magma or possibly from local volcanic wall-rock. Combined, the fluid inclusion and stable isotope data indicate that the Aliabad-Khanchy deposit formed from magmatic-hydrothermal fluids. After rising to a depth of between 790 and 500 m, the fluid boiled and subsequent hydraulic fracturing may have led to inflow and/or mixing of early magmatic fluids with circulating groundwater causing deposition of <span class="hlt">base</span> <span class="hlt">metals</span> due to dilution and/or cooling. The Aliabad-Khanchy deposit is interpreted as an intermediate-<span class="hlt">sulfidation</span> style of epithermal mineralization. Our data suggest that the mineralization at Aliabad-Khanchy and other epithermal deposits of the THMB formed by hydrothermal activity related to shallow late Eocene magmatism. The altered Eocene volcanic and</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2011M%26PS...46.1484V','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2011M%26PS...46.1484V"><span><span class="hlt">Metal/sulfide</span>-silicate intergrowth textures in EL3 meteorites: Origin by impact melting on the EL parent body</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>van Niekerk, Deon; Keil, Klaus</p> <p>2011-10-01</p> <p>We document the petrographic setting and textures of Fe,Ni <span class="hlt">metal</span>, the mineralogy of <span class="hlt">metallic</span> assemblages, and the modal mineral abundances in the EL3 meteorites Asuka (A-) 881314, A-882067, Allan Hills 85119, Elephant Moraine (EET) 90299/EET 90992, LaPaz Icefield 03930, MacAlpine Hills (MAC) 02635, MAC 02837/MAC 02839, MAC 88136, Northwest Africa (NWA) 3132, Pecora Escarpment 91020, Queen Alexandra Range (QUE) 93351/QUE 94321, QUE 94594, and higher petrologic type ELs Dar al Gani 1031 (EL4), Sayh al Uhaymir 188 (EL4), MAC 02747 (EL4), QUE 94368 (EL4), and NWA 1222 (EL5). Large <span class="hlt">metal</span> assemblages (often containing schreibersite and graphite) only occur outside chondrules and are usually intergrown with silicate minerals (euhedral to subhedral enstatite, silica, and feldspar). <span class="hlt">Sulfides</span> (troilite, daubréelite, and keilite) are also sometimes intergrown with silicates. Numerous authors have shown that <span class="hlt">metal</span> in enstatite chondrites that are interpreted to have been impact melted contains euhedral crystals of enstatite. We argue that the <span class="hlt">metal/sulfide</span>-silicate intergrowths in the ELs we studied were also formed during impact melting and that <span class="hlt">metal</span> in EL3s thus does not retain primitive (i.e., nebular) textures. Likewise, the EL4s are also impact-melt breccias. Modal abundances of <span class="hlt">metal</span> in the EL3s and EL4s range from approximately 7 to 30 wt%. These abundances overlap or exceed those of EL6s, and this is consistent either with pre-existing heterogeneity in the parent body or with redistribution of <span class="hlt">metal</span> during impact processes.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/28646720','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/28646720"><span>Nanoporous gold-<span class="hlt">based</span> microbial biosensor for direct determination of <span class="hlt">sulfide</span>.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Liu, Zhuang; Ma, Hanyue; Sun, Huihui; Gao, Rui; Liu, Honglei; Wang, Xia; Xu, Ping; Xun, Luying</p> <p>2017-12-15</p> <p>Environmental pollution caused by <span class="hlt">sulfide</span> compounds has become a major problem for public health. Hence, there is an urgent need to explore a sensitive, selective, and simple <span class="hlt">sulfide</span> detection method for environmental monitoring and protection. Here, a novel microbial biosensor was developed using recombinant Escherichia coli BL21 (E. coli BL21) expressing <span class="hlt">sulfide</span>:quinone oxidoreductase (SQR) for <span class="hlt">sulfide</span> detection. As an important enzyme involved in the initial step of <span class="hlt">sulfide</span> metabolism, SQR oxidizes <span class="hlt">sulfides</span> to polysulfides and transfers electrons to the electron transport chain. Nanoporous gold (NPG) with its unique properties was selected for recombinant E. coli BL21 cells immobilization, and then glassy carbon electrode (GCE) was modified by the resulting E. coli/NPG biocomposites to construct an E. coli/NPG/GCE bioelectrode. Due to the catalytic oxidation properties of NPG for <span class="hlt">sulfide</span>, the electrochemical reaction of the E. coli/NPG/GCE bioelectrode is attributed to the co-catalysis of SQR and NPG. For <span class="hlt">sulfide</span> detection, the E. coli/NPG/GCE bioelectrode showed a good linear response ranging from 50μM to 5mM, with a high sensitivity of 18.35μAmM -1 cm -2 and a low detection limit of 2.55μM. The anti-interference ability of the E. coli/NPG/GCE bioelectrode is better than that of enzyme-<span class="hlt">based</span> inhibitive biosensors. Further, the E. coli/NPG/GCE bioelectrode was successfully applied to the detection of <span class="hlt">sulfide</span> in wastewater. These unique properties potentially make the E. coli/NPG/GCE bioelectrode an excellent choice for reliable <span class="hlt">sulfide</span> detection. Copyright © 2017 Elsevier B.V. All rights reserved.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2017ApSS..423..492D','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2017ApSS..423..492D"><span>Trace hydrogen <span class="hlt">sulfide</span> gas sensor <span class="hlt">based</span> on tungsten <span class="hlt">sulfide</span> membrane-coated thin-core fiber modal interferometer</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Deng, Dashen; Feng, Wenlin; Wei, Jianwei; Qin, Xiang; Chen, Rong</p> <p>2017-11-01</p> <p>A novel fiber-optic hydrogen <span class="hlt">sulfide</span> sensor <span class="hlt">based</span> on a thin-core Mach-Zehnder fiber modal interferometer (TMZFI) is demonstrated and fabricated. This in-line interferometer is composed of a short section of thin-core fiber sandwiched between two standard single mode fibers, and the fast response to hydrogen <span class="hlt">sulfide</span> is achieved via the construction of tungsten <span class="hlt">sulfide</span> film on the outside surface of the TMZFI using the dip-coating and calcination technique. The fabricated sensing nanofilm is characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM), high resolution transmission electron microscopy (HRTEM), X-ray photoelectron spectroscopy (XPS) spectrometer, Fourier transform infrared (FTIR) and spectroscopic analysis technology, etc. Experimental results showed that the WS2 sensing film has a hexagonal structure with a compact and porous morphology. The XPS and FTIR indicate that the existence of two elements (W and S) is demonstrated. With the increasing concentration of hydrogen <span class="hlt">sulfide</span>, the interference spectra appear blue shift. In addition, a high sensitivity of 18.37 pm/ppm and a good linear relationship are obtained within a measurement range from 0 to 80 ppm. In addition, there is an excellent selectivity for H2S, which has also been proved by the surface adsorption energy results of tungsten <span class="hlt">sulfide</span> with four gases (H2S, N2, O2 and CO2) by using the density functional theory calculations. This interferometer has the advantages of simple structure, high sensitivity and easy manufacture, and could be used in the safety monitoring field of hydrogen <span class="hlt">sulfide</span> gas.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4981876','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4981876"><span>Amperometric inhibitive biosensor <span class="hlt">based</span> on horseradish peroxidase-nanoporous gold for <span class="hlt">sulfide</span> determination</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Sun, Huihui; Liu, Zhuang; Wu, Chao; Xu, Ping; Wang, Xia</p> <p>2016-01-01</p> <p>As a well-known toxic pollutant, <span class="hlt">sulfide</span> is harmful to human health. In this study, a simple and sensitive amperometric inhibitive biosensor was developed for the determination of <span class="hlt">sulfide</span> in the environment. By immobilizing nanoporous gold (NPG) on glassy carbon electrode (GCE), and encapsulating horseradish peroxidase (HRP) onto NPG, a HRP/NPG/GCE bioelectrode for <span class="hlt">sulfide</span> detection was successfully constructed <span class="hlt">based</span> on the inhibition of <span class="hlt">sulfide</span> on HRP activity with o-Phenylenediamine (OPD) as a substrate. The resulted HRP/NPG/GCE bioelectrode achieved a wide linear range of 0.1–40 μM in <span class="hlt">sulfide</span> detection with a high sensitivity of 1720 μA mM−1 cm−2 and a low detection limit of 0.027 μM. Additionally, the inhibition of <span class="hlt">sulfide</span> on HRP is competitive inhibition with OPD as a substrate by Michaelis-Menten analysis. Notably, the recovery of HRP activity was quickly achieved by washing the HRP/NPG/GCE bioelectrode using differential pulse voltammetry (DPV) technique in deaerated PBS (50 mM, pH 7.0) for only 60 s. Furthermore, the real sample analysis of <span class="hlt">sulfide</span> by the HRP/NPG/GCE bioelectrode was achieved. <span class="hlt">Based</span> on above results, the HRP/NPG/GCE bioelectrode could be a better choice for the real determination of <span class="hlt">sulfide</span> compared to inhibitive biosensors previously reported. PMID:27515253</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2016NatSR...630905S','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2016NatSR...630905S"><span>Amperometric inhibitive biosensor <span class="hlt">based</span> on horseradish peroxidase-nanoporous gold for <span class="hlt">sulfide</span> determination</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Sun, Huihui; Liu, Zhuang; Wu, Chao; Xu, Ping; Wang, Xia</p> <p>2016-08-01</p> <p>As a well-known toxic pollutant, <span class="hlt">sulfide</span> is harmful to human health. In this study, a simple and sensitive amperometric inhibitive biosensor was developed for the determination of <span class="hlt">sulfide</span> in the environment. By immobilizing nanoporous gold (NPG) on glassy carbon electrode (GCE), and encapsulating horseradish peroxidase (HRP) onto NPG, a HRP/NPG/GCE bioelectrode for <span class="hlt">sulfide</span> detection was successfully constructed <span class="hlt">based</span> on the inhibition of <span class="hlt">sulfide</span> on HRP activity with o-Phenylenediamine (OPD) as a substrate. The resulted HRP/NPG/GCE bioelectrode achieved a wide linear range of 0.1-40 μM in <span class="hlt">sulfide</span> detection with a high sensitivity of 1720 μA mM-1 cm-2 and a low detection limit of 0.027 μM. Additionally, the inhibition of <span class="hlt">sulfide</span> on HRP is competitive inhibition with OPD as a substrate by Michaelis-Menten analysis. Notably, the recovery of HRP activity was quickly achieved by washing the HRP/NPG/GCE bioelectrode using differential pulse voltammetry (DPV) technique in deaerated PBS (50 mM, pH 7.0) for only 60 s. Furthermore, the real sample analysis of <span class="hlt">sulfide</span> by the HRP/NPG/GCE bioelectrode was achieved. <span class="hlt">Based</span> on above results, the HRP/NPG/GCE bioelectrode could be a better choice for the real determination of <span class="hlt">sulfide</span> compared to inhibitive biosensors previously reported.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/20130011096','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/20130011096"><span>Compositions of Magmatic and Impact Melt <span class="hlt">Sulfides</span> in Tissint And EETA79001: Precursors of Immiscible <span class="hlt">Sulfide</span> Melt Blebs in Shergottite Impact Melts</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Ross, D. K.; Rao, M. N.; Nyquist, L.; Agee, C.; Sutton, S.</p> <p>2013-01-01</p> <p>Immiscible <span class="hlt">sulfide</span> melt spherules are locally very abundant in shergottite impact melts. These melts can also contain samples of Martian atmospheric gases [1], and cosmogenic nuclides [2] that are present in impact melt, but not in the host shergottite, indicating some components in the melt resided at the Martian surface. These observations show that some regolith components are, at least locally, present in the impact melts. This view also suggests that one source of the over-abundant sulfur in these impact melts could be sulfates that are major constituents of Martian regolith, and that the sulfates were reduced during shock heating to <span class="hlt">sulfide</span>. An alternative view is that <span class="hlt">sulfide</span> spherules in impact melts are produced solely by melting the crystalline <span class="hlt">sulfide</span> minerals (dominantly pyrrhotite, Fe(1-x)S) that are present in shergottites [3]. In this abstract we report new analyses of the compositions of <span class="hlt">sulfide</span> immiscible melt spherules and pyrrhotite in the shergottites Tissint, and EETA79001,507, and we use these data to investigate the possible origins of the immiscible <span class="hlt">sulfide</span> melt spherules. In particular, we use the <span class="hlt">metal/S</span> ratios determined in these blebs as potential diagnostic criteria for tracking the source material from which the numerous <span class="hlt">sulfide</span> blebs were generated by shock in these melts.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2014EGUGA..16..991M','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2014EGUGA..16..991M"><span>Acid Volatile <span class="hlt">Sulfides</span> (avs) and the Bioavailability of Trace <span class="hlt">Metals</span> in the Channel of the SÃO Francisco River, Sepetiba Bay - de Janeiro-Brazil</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Monte, Christiane; Rodrigues, Ana Paula; Marinho, Matheus; Quaresma, Tássia; Machado, Wilson</p> <p>2014-05-01</p> <p>Sepetiba Bay has 430 Km2 of internal and 2,500 Km2 area of the drainage basin (Lacerda et al., 2007), located 60 km west of the city of Rio de Janeiro. Sepetiba Bay has 430 Km2 of internal and 2,500 Km2 area of the drainage basin (Lacerda et al., 2007), located 60 km west of the city of Rio de Janeiro.The San Francisco channel comes from the Guandu River and empties into Sepetiba Bay and is the main contributor of freshwater to the estuarine system. The Guandu River system/channel of San Francisco receives contribution of domestic and industrial effluents, which go largely to Sepetiba Bay. This work aimed to evaluate the .This work aimed to evaluate the ratio SEM/AVS as a way of predicting bioavailability trace <span class="hlt">metals</span> from industrial sewage, mainly, in the estuarine system of Sepetiba. This model is <span class="hlt">based</span> on the property of some Divalent <span class="hlt">metal</span> cations (Cd, Cu, Ni, Pb and Zn), by presenting a low solubility constant, are removed from the soluble fraction by precipitation, forming secondary <span class="hlt">metal</span> <span class="hlt">sulfides</span>. Were held four transects, made up of three points each, the coast line to the center of the Bay. The surface sediment was collected with a van Veen sampler type ,packed in glass jars and kept frozen until analysis.The determination of SEM/AVS followed the methodology described by Allen et al. (1991). The variation between <span class="hlt">sulfide</span> 159.88 ± 0.05 µmol/g on 12 points. The <span class="hlt">metals</span> that entered the sum of simultaneous extraction were: Cd, Cu, Ni, Pb and Zn ranging from: 6.47 ± 0.11 µmol/g on sum.The means (± standard deviation) ratio SEM/AVS per transect were: 1.04 ± 1.20 (transect 1); 0.48 ± 0.53 (transect 2); 1.26 ± 1.32 (transect 3) and 0.18 ± 0.14 (transect 4). Only transects 1 and 3 had higher results than 1 , meaning that there are more divalent <span class="hlt">metal</span> <span class="hlt">sulfides</span> in the environment. This means that only the <span class="hlt">sulfides</span> would not be capable of complex and may reflect the potential bioavailability of these in the aquatic environment. There is no statistical</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=181707&keyword=XRD&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50','EPA-EIMS'); return false;" href="https://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=181707&keyword=XRD&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50"><span>CATALYTIC OXIDATION OF DIMETHYL <span class="hlt">SULFIDE</span> WITH OZONE: EFFECTS OF PROMOTER AND PHYSICO-CHEMICAL PROPERTIES OF <span class="hlt">METAL</span> OXIDE CATALYSTS</span></a></p> <p><a target="_blank" href="http://oaspub.epa.gov/eims/query.page">EPA Science Inventory</a></p> <p></p> <p></p> <p>This study reports improved catalytic activities and stabilities for the oxidation of dimethyl <span class="hlt">sulfide</span> (DMS), a major pollutant of pulp and paper mills. Ozone was used as an oxidant and activities of Cu, Mo, Cr and Mn oxides, and mixed <span class="hlt">metal</span> oxides supported on -alumina, were tes...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/28466985','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/28466985"><span>In Situ Transformation of MOFs into Layered Double Hydroxide Embedded <span class="hlt">Metal</span> <span class="hlt">Sulfides</span> for Improved Electrocatalytic and Supercapacitive Performance.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Yilmaz, Gamze; Yam, Kah Meng; Zhang, Chun; Fan, Hong Jin; Ho, Ghim Wei</p> <p>2017-07-01</p> <p>Direct adoption of <span class="hlt">metal</span>-organic frameworks (MOFs) as electrode materials shows impoverished electrochemical performance owing to low electrical conductivity and poor chemical stability. In this study, we demonstrate self-templated pseudomorphic transformation of MOF into surface chemistry rich hollow framework that delivers highly reactive, durable, and universal electrochemically active energy conversion and storage functionalities. In situ pseudomorphic transformation of MOF-derived hollow rhombic dodecahedron template and sulfurization of nickel cobalt layered double hydroxides (NiCo-LDHs) lead to the construction of interlayered <span class="hlt">metal</span> <span class="hlt">sulfides</span> (NiCo-LDH/Co 9 S 8 ) system. The embedment of <span class="hlt">metal</span> <span class="hlt">sulfide</span> species (Co 9 S 8 ) at the LDH intergalleries offers optimal interfacing of the hybrid constituent elements and materials stability. The hybrid NiCo-LDH/Co 9 S 8 system collectively presents an ideal porous structure, rich redox chemistry, and high electrical conductivity matrix. This leads to a significant enhancement in its complementary electrocatalytic hydrogen evolution and supercapacitive energy storage properties. This work establishes the potential of MOF derived scaffold for designing of novel class hybrid inorganic-organic functional materials for electrochemical applications and beyond. © 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/servlets/purl/1176072','DOE-PATENT-XML'); return false;" href="https://www.osti.gov/servlets/purl/1176072"><span>Membrane for hydrogen recovery from streams containing hydrogen <span class="hlt">sulfide</span></span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Agarwal, Pradeep K.</p> <p>2007-01-16</p> <p>A membrane for hydrogen recovery from streams containing hydrogen <span class="hlt">sulfide</span> is provided. The membrane comprises a substrate, a hydrogen permeable first membrane layer deposited on the substrate, and a second membrane layer deposited on the first layer. The second layer contains <span class="hlt">sulfides</span> of transition <span class="hlt">metals</span> and positioned on the on a feed side of the hydrogen <span class="hlt">sulfide</span> stream. The present invention also includes a method for the direct decomposition of hydrogen <span class="hlt">sulfide</span> to hydrogen and sulfur.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2017MRE.....4g5501S','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2017MRE.....4g5501S"><span>Hydrogen <span class="hlt">sulfide</span> removal in water-<span class="hlt">based</span> drilling fluid by <span class="hlt">metal</span> oxide nanoparticle and ZnO/TiO2 nanocomposite</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Salehi Morgani, M.; Saboori, R.; Sabbaghi, S.</p> <p>2017-07-01</p> <p>Advanced approaches to the application of nanomaterials for environmental studies, such as waste-water treatment and pollution removal/adsorption, have been considered in recent decades. In this research, hydrogen <span class="hlt">sulfide</span> removal from water-<span class="hlt">based</span> drilling fluid by ZnO and TiO2 nanoparticles and a ZnO/TiO2 nanocomposite was studied experimentally. The ZnO and TiO2 nanoparticles were synthesized by sedimentation and the sol-gel method. A sol-chemical was employed to synthesize the ZnO/TiO2 nanocomposite. X-ray diffraction, scanning electron microscopy (SEM), Brunauer-Emmett-Teller (BET) surface analysis, inductively coupled plasma mass spectrometry (ICP), dynamic light scattering (DLS) and Fourier transform infrared spectroscopy were used to characterize the produced ZnO and TiO2 nanoparticles, and the ZnO/TiO2 nanocomposite. The results showed that the concentration of hydrogen <span class="hlt">sulfide</span> decreased from 800 ppm to about 250 ppm (about 70% removal) and less than 150 ppm (more than 80% removal) using the TiO2 and ZnO nanoparticles with a 0.67 wt% concentration, respectively. Hydrogen <span class="hlt">sulfide</span> removal using the ZnO/TiO2 nanocomposite with a 0.67 wt% showed the highest value of removal in comparison with the TiO2 and ZnO nanoparticles. The hydrogen <span class="hlt">sulfide</span> level was lowered from 800 ppm to less than 5 ppm (99% removal) by the nanocomposite.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/22214777','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/22214777"><span>Hepatitis C virus RNA elimination and development of resistance in replicon cells treated with <span class="hlt">BMS</span>-790052.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Wang, Chunfu; Huang, Haichang; Valera, Lourdes; Sun, Jin-Hua; O'Boyle, Donald R; Nower, Peter T; Jia, Lingling; Qiu, Dike; Huang, Xin; Altaf, Aneela; Gao, Min; Fridell, Robert A</p> <p>2012-03-01</p> <p><span class="hlt">BMS</span>-790052, a first-in-class hepatitis C virus (HCV) replication complex inhibitor, targeting nonstructural protein 5A (NS5A), displays picomolar to nanomolar potency against genotypes 1 to 5. This exceptional potency translated into robust anti-HCV activity in clinical studies with HCV genotype 1-infected subjects. To date, all <span class="hlt">BMS</span>-790052-associated resistance mutations have mapped to the N-terminal region of NS5A. To further characterize the antiviral activity of <span class="hlt">BMS</span>-790052, HCV replicon elimination and colony formation assays were performed. Replicon was cleared from genotype 1a and 1b replicon cells in a time- and dose-dependent manner. Elimination of the genotype 1a replicon required longer treatment durations and higher concentrations of <span class="hlt">BMS</span>-790052 than those for the genotype1b replicon. Single amino acid substitutions that conferred relatively low levels of resistance were observed at early time points and at low doses. Higher doses and longer treatment durations yielded mutations that conferred greater levels of resistance, including linked amino acid substitutions. Replicon cells that survived inhibitor treatment remained fully sensitivity to pegylated alpha interferon (pegIFN-α) and other HCV inhibitors. Moreover, genotype 1a replicon elimination was markedly enhanced when pegIFN-α and <span class="hlt">BMS</span>-790052 were combined. Resistant variants observed in this study were very similar to those observed in a multiple ascending dose (MAD) monotherapy trial of <span class="hlt">BMS</span>-790052, validating replicon elimination studies as a model to predict clinical resistance. Insights gained from the in vitro anti-HCV activity and resistance profiles of <span class="hlt">BMS</span>-790052 will be used to help guide the clinical development of this novel HCV inhibitor.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/29096435','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/29096435"><span>Interlayer-Expanded <span class="hlt">Metal</span> <span class="hlt">Sulfides</span> on Graphene Triggered by a Molecularly Self-Promoting Process for Enhanced Lithium Ion Storage.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Wang, Qingqing; Rui, Kun; Zhang, Chao; Ma, Zhongyuan; Xu, Jingsan; Sun, Wenping; Zhang, Weina; Zhu, Jixin; Huang, Wei</p> <p>2017-11-22</p> <p>A general synthetic approach has been demonstrated to fabricate three-dimensional (3D) structured <span class="hlt">metal</span> <span class="hlt">sulfides</span>@graphene, employing few-layered <span class="hlt">sulfide</span> nanostructures with expanded interlayer spacing of the (002) plane (e.g., 0.98 nm for MoS 2 nanoclusters and 0.65 nm for VS 4 nanoribbons) and electrically conductive graphene as ideal building blocks. Here, small molecules (thioacetamide) acting as both the sulfur source and, more importantly, the structure-directing agent adjusting the interlayer spacing are wisely selected, further contributing to a sufficient space for ultrafast Li + ion intercalation. The appealing features of a mechanically robust backbone, ultrathin thickness, abundant exposure of interlayer edges, and good electrical conductivity in such 3D architectures are favorable for providing easy access for the electrolyte to the structures and offering a shortened diffusion length of Li + when utilized for energy storage. As a proof of concept, the electrochemical behavior of the resulting 3D structured <span class="hlt">metal</span> <span class="hlt">sulfides</span>@graphene as an anode material of lithium ion batteries (LIBs) is systematically investigated. As a consequence, high specific capacities, long lifespans, and superior rate capabilities have been realized in such well-designed architectures, e.g. maintaining a specific capacity as high as 965 mAh g -1 for 120 cycles for VS 4 @graphene and 1100 mAh g -1 for 150 cycles for MoS 2 @graphene.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2007AGUFM.V34B..05C','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2007AGUFM.V34B..05C"><span>The Role of Magmatic Volatile Input, Near-surface Seawater Entrainment and <span class="hlt">Sulfide</span> Deposition in Regulating <span class="hlt">Metal</span> Concentrations Within Manus Basin Hydrothermal Systems</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Craddock, P. R.; Tivey, M. K.; Seewald, J. S.; Rouxel, O.; Bach, W.</p> <p>2007-12-01</p> <p>Analyses of Fe, Mn, Cu, Zn, Pb, Ag, Cd, Co and Sb in vent fluid samples from four hydrothermal systems in the Manus back-arc basin, Papua New Guinea, were carried out by ICP-MS. Vienna Woods is located on the well- defined, basalt-dominated Manus Spreading Center, while the other systems are hosted in felsic volcanics on the Pual Ridge (PACMANUS), within a caldera (DESMOS), and on volcanic cones (SuSu Knolls). <span class="hlt">Metal</span> concentrations were coupled with other fluid data (pH, SO4, Ca, H2S) to discriminate effects of deep- seated water-rock reaction and magmatic volatile input from near surface seawater entrainment, mixing, and consequent mineral precipitation and <span class="hlt">metal</span> remobilization. Both magmatic volatile input (e.g. SO2, HCl, HF) and <span class="hlt">sulfide</span> precipitation can increase fluid acidity and thus affect the aqueous mobility of <span class="hlt">metals</span>. At Vienna Woods, 280°C end-member (Mg = 0) fluids have high pH (>4.2) and low <span class="hlt">metal</span> contents (Fe <160 uM, Cu <10 uM, Zn <40 uM) relative to most mid-ocean ridge (MOR) vent fluids. The high pH and lack of evidence for magmatic volatile input are consistent with fluid compositions regulated by subsurface seawater- basalt/andesite reactions. Despite low aqueous Zn concentrations, Zn-rich (wurtzite-lined) chimneys are common at Vienna Woods active vents, reflecting deposition from fluids characterized by low Fe and Cu and high pH. At PACMANUS, black smoker fluids (T >300°C, pH ~ 2.7) are enriched in <span class="hlt">sulfide</span>-forming <span class="hlt">metals</span> by an order of magnitude relative to Vienna Woods fluids. Enrichments at PACMANUS reflect efficient leaching of <span class="hlt">metals</span> at low pH, with the lower pH likely a result of input of magmatic volatiles. In addition, some vents fluids show clear evidence for seawater entrainment, subsurface precipitation of Cu-Fe-<span class="hlt">sulfides</span> and preferential remobilization of Zn-<span class="hlt">sulfides</span> (lower T, non-zero Mg, lower Fe, Cu, H2S and pH (2.3-2.4), but higher Zn, Pb, Cd and Ag, compared to black smokers). The higher <span class="hlt">metal</span> concentrations and lower pH of</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://pubs.usgs.gov/journal/1977/vol5issue4/report.pdf','USGSPUBS'); return false;" href="https://pubs.usgs.gov/journal/1977/vol5issue4/report.pdf"><span>Chemical dissolution of <span class="hlt">sulfide</span> minerals</span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Chao, T.T.; Sanzolone, R.F.</p> <p>1977-01-01</p> <p>Chemical dissolution treatments involving the use of aqua regia, 4 N HNO3, H2O2-ascorbic acid, oxalic acid, KClO3+HCl, and KClO3+HCl followed by 4 N HNO3 were applied to specimens of nine common <span class="hlt">sulfide</span> minerals (galena, chalcopyrite, cinnabar, molybdenite, orpiment, pyrite, stibnite, sphalerite, and tetrahedrite) mixed individually with a clay loam soil. The resultant decrease in the total sulfur content of the mixture, as determined by using the Leco induction furnace, was used to evaluate the effectiveness of each chemical treatment. A combination of KClO3+HCl followed by 4 N HNO3 boiling gently for 20 min has been shown to be very effective in dissolving all the <span class="hlt">sulfide</span> minerals. This treatment is recommended to dissolve <span class="hlt">metals</span> residing in <span class="hlt">sulfide</span> minerals admixed with secondary weathering products, as one step in a fractionation scheme whereby <span class="hlt">metals</span> in soluble and adsorbed forms, and those associated with organic materials and secondary oxides, are first removed by other chemical extractants.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=5463596','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=5463596"><span>OS03.4 Gammaknife versus Linac <span class="hlt">based</span> (EDGE) radiosurgery (SRS) for patients with limited brain metastases (<span class="hlt">BMS</span>) from different solid tumor: a phase III randomized trial.</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Scorsetti, M.; Navarria, P.; Ascolese, A.; Clerici, E.; Mancosu, P.; Picozzi, P.; Pecchioli, G.; Franzese, C.; Reggiori, G.; Tomatis, S.</p> <p>2017-01-01</p> <p>Abstract Introduction: Radiosurgery is an emerging terapeutich approach for the treatment of brain metastases (<span class="hlt">BMs</span>), considering the effective local control obtained without neurological impairment. Different technological modalities have been used: Gammaknife, Cybernife, or Linac with comparable results and different incidence of symptomatic radionecrosis. To date no comparative randomized studies have been published on this matter. We draw this randomized phase III trial with the aim to evaluate incidence of symptomatic radionecrosis using gamma knife radiosurgery versus linac <span class="hlt">based</span> (EDGE) radiosurgery. Local control (LC) rate and patients overall survival (OS) were assessed as well. Materials: Patients with limited <span class="hlt">BMs</span> (up to 4) from different solid tumors, except SCLC or hematologic malignancies, were enrolled. Inclusion criteria were a histopatological diagnosis of malignant primary tumor, a KPS ≥70, RPA class I-II, and <span class="hlt">BMs</span> with maximum diameter ≤3 cm and/or with a total tumor volume <30 cm3. The total dose prescribed was 24 Gy for <span class="hlt">BMs</span> ≤ 20 mm or 4.2 cm3, and 20 Gy for <span class="hlt">BMs</span> 21–30 mm or volume <14.1 cm3 as suggested by RTOG guidelines. Clinical outcome was evaluated by neurological examination and MRI at 2 months after SRS and then every 3 months. The radionecrosis was considered the presence of central hypodensity and peripheral enhancement on T1-weighted post-contrast imaging, with edema on T2-weighted sequences and a clear lack of perfusion without any nodular highly vascularized area within the contrast enhanced lesion on perfusion MRI. Local progression was defined as radiographic increase of the enhancing abnormality in the irradiated volume on serial MR imaging, and distant failure by the presence of new brain metastases or leptomeningeal enhancement outside the irradiated volume. Results: From October 2014 to December 2015, 101 consecutives patients of the expected 250, for 167 <span class="hlt">BMs</span> treated, were evaluated. The most common primary</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/11350914','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/11350914"><span><span class="hlt">BMS</span>-247550: a novel epothilone analog with a mode of action similar to paclitaxel but possessing superior antitumor efficacy.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Lee, F Y; Borzilleri, R; Fairchild, C R; Kim, S H; Long, B H; Reventos-Suarez, C; Vite, G D; Rose, W C; Kramer, R A</p> <p>2001-05-01</p> <p><span class="hlt">BMS</span>-247550, a novel epothilone derivative, is being developed by Bristol-Myers Squibb Company (<span class="hlt">BMS</span>) as an anticancer agent for the treatment of patients with malignant tumors. <span class="hlt">BMS</span>-247550 is a semisynthetic analogue of the natural product epothilone B and has a mode of action analogous to that of paclitaxel (i.e., microtubule stabilization). In vitro, it is twice as potent as paclitaxel in inducing tubulin polymerization. Like paclitaxel, <span class="hlt">BMS</span>-247550 is a highly potent cytotoxic agent capable of killing cancer cells at low nanomolar concentrations. Importantly, <span class="hlt">BMS</span>-247550 retains its antineoplastic activity against human cancers that are naturally insensitive to paclitaxel or that have developed resistance to paclitaxel, both in vitro and in vivo. Tumors for which <span class="hlt">BMS</span>-247550 demonstrated significant antitumor activity encompass both paclitaxel-sensitive and -refractory categories, i.e., (a) paclitaxel-resistant: HCT116/VM46 colorectal (multidrug resistant), Pat-21 breast and Pat-7 ovarian carcinoma (clinical isolates; mechanisms of resistance not fully known), and A2780Tax ovarian carcinoma (tubulin mutation); (b) paclitaxel-insensitive: Pat-26 human pancreatic carcinoma (clinical isolate) and M5076 murine fibrosarcoma; and (c) paclitaxel sensitive: A2780 ovarian, LS174T, and HCT116 human colon carcinoma. In addition, <span class="hlt">BMS</span>-247550 is p.o. efficacious against preclinical human tumor xenografts grown in immunocompromised mice or rats. Schedule optimization studies indicate that <span class="hlt">BMS</span>-247550 is efficacious when administered frequently (every 2 days x 5) or intermittently (every 4 days x 3 or every 8 days x 2). These efficacy data demonstrate that <span class="hlt">BMS</span>-247550 has the potential to surpass Taxol in both clinical efficacy and ease of use (i.e., less frequent treatment schedule and/or oral administration).</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_7");'>7</a></li> <li><a href="#" onclick='return showDiv("page_8");'>8</a></li> <li class="active"><span>9</span></li> <li><a href="#" onclick='return showDiv("page_10");'>10</a></li> <li><a href="#" onclick='return showDiv("page_11");'>11</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_9 --> <div id="page_10" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_8");'>8</a></li> <li><a href="#" onclick='return showDiv("page_9");'>9</a></li> <li class="active"><span>10</span></li> <li><a href="#" onclick='return showDiv("page_11");'>11</a></li> <li><a href="#" onclick='return showDiv("page_12");'>12</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="181"> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/21551305','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/21551305"><span>Complete genome sequence of Metallosphaera cuprina, a <span class="hlt">metal</span> <span class="hlt">sulfide</span>-oxidizing archaeon from a hot spring.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Liu, Li-Jun; You, Xiao-Yan; Zheng, Huajun; Wang, Shengyue; Jiang, Cheng-Ying; Liu, Shuang-Jiang</p> <p>2011-07-01</p> <p>The genome of the <span class="hlt">metal</span> <span class="hlt">sulfide</span>-oxidizing, thermoacidophilic strain Metallosphaera cuprina Ar-4 has been completely sequenced and annotated. Originally isolated from a sulfuric hot spring, strain Ar-4 grows optimally at 65°C and a pH of 3.5. The M. cuprina genome has a 1,840,348-bp circular chromosome (2,029 open reading frames [ORFs]) and is 16% smaller than the previously sequenced Metallosphaera sedula genome. Compared to the M. sedula genome, there are no counterpart genes in the M. cuprina genome for about 480 ORFs in the M. sedula genome, of which 243 ORFs are annotated as hypothetical protein genes. Still, there are 233 ORFs uniquely occurring in M. cuprina. Genome annotation supports that M. cuprina lives a facultative life on CO(2) and organics and obtains energy from oxidation of <span class="hlt">sulfidic</span> ores and reduced inorganic sulfuric compounds.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=2614316','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=2614316"><span>HER receptor signaling confers resistance to the insulin-like growth factor 1 receptor inhibitor, <span class="hlt">BMS</span>-536924</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Haluska, Paul; Carboni, Joan M.; Eyck, Cynthia Ten; Attar, Ricardo M.; Hou, Xiaonan; Yu, Chunrong; Sagar, Malvika; Wong, Tai W.; Gottardis, Marco M.; Erlichman, Charles</p> <p>2008-01-01</p> <p>We have previously reported the activity of the IGF-1R/InsR inhibitor, <span class="hlt">BMS</span>-554417, in breast and ovarian cancer cell lines. Further studies indicated treatment of OV202 ovarian cancer cells with <span class="hlt">BMS</span>-554417 increased phosphorylation of HER2. In addition, treatment with the panHER inhibitor, <span class="hlt">BMS</span>-599626, resulted in increased phosphorylation of IGF1-R, suggesting a reciprocal crosstalk mechanism. In a panel of five ovarian cancer cell lines simultaneous treatment with the IGF-1R/InsR inhibitor, <span class="hlt">BMS</span>-536924 and <span class="hlt">BMS</span>-599626 resulted in a synergistic antiproliferative effect. Furthermore, combination therapy decreased AKT and ERK activation and increased biochemical and nuclear morphological changes consistent with apoptosis as compared to either agent alone. In response to treatment with <span class="hlt">BMS</span>-536924, increased expression and activation of various members of the HER family of receptors were seen in all five ovarian cancer cell lines, suggesting inhibition of IGF-1R/InsR results in adaptive upregulation of the HER pathway. Using MCF-7 breast cancer cell variants that overexpressed HER1 or HER2, we then tested the hypothesis that HER receptor expression is sufficient to confer resistance to IGF-1R targeted therapy. In the presence of activating ligands EGF or heregulin, respectively, MCF-7 cells expressing HER1 or HER2 were resistant to <span class="hlt">BMS</span>-536924 as determined in a proliferation and clonogenic assay. These data suggested that simultaneous treatment with inhibitors of the IGF-1 and HER family of receptors may be an effective strategy for clinical investigations of IGF-1R inhibitors in breast and ovarian cancer and that targeting HER1 and HER2 may overcome clinical resistance to IGF-1R inhibitors. PMID:18765823</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2018GeCoA.223...36Z','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2018GeCoA.223...36Z"><span><span class="hlt">Metal</span> endowment reflected in chemical composition of silicates and <span class="hlt">sulfides</span> of mineralized porphyry copper systems, Urumieh-Dokhtar magmatic arc, Iran</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Zarasvandi, Alireza; Rezaei, Mohsen; Raith, Johann G.; Pourkaseb, Houshang; Asadi, Sina; Saed, Madineh; Lentz, David R.</p> <p>2018-02-01</p> <p>The present work attempts to discriminate between the geochemical features of magmatic-hydrothermal systems involved in the early stages of mineralization in high grade versus low grade porphyry copper systems, using chemical compositions of silicate and <span class="hlt">sulfide</span> minerals (i.e., plagioclase, biotite, pyrite and chalcopyrite). The data indicate that magmatic plagioclase in all of the porphyry copper systems studied here has high An% and Al content with a significant trend of evolution toward AlAl3SiO8 and □Si4O8 endmembers, providing insight into the high melt water contents of the parental magmas. Comparably, excess Al and An% in the high grade deposits appears to be higher than that of selected low grade deposits, representing a direct link between the amounts of exsolving hydrothermal fluids and the potential of <span class="hlt">metal</span> endowment in porphyry copper deposits (PCDs). Also, higher Al contents accompanied by elevated An% are linked to the increasing intensity of disruptive alteration (phyllic) in feldspars from the high grade deposits. As calculated from biotite compositions, chloride contents are higher in the exsolving hydrothermal fluids that contributed to the early mineralization stages of highly mineralized porphyry systems. However, as evidenced by scattered and elevated log (fH2O)/(fHF) and log (fH2O)/(fHCl) values, chloride contents recorded in biotite could be influenced by post potassic fluids. Geothermometry of biotite associated with the onset of <span class="hlt">sulfide</span> mineralization indicates that there is a trend of increasing temperature from high grade to low grade porphyry systems. Significantly, this is coupled with a sharp change in copper content of pyrite assemblages precipitated at the early stages of mineralization such that Cu decreased with increasing temperature. <span class="hlt">Based</span> on EMPA and detailed WDS elemental mapping, trace elements do not exhibit complex compositional zoning or solid solution in the <span class="hlt">sulfide</span> structure. Nevertheless, significant amounts of Cu and</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://pubs.er.usgs.gov/publication/70017770','USGSPUBS'); return false;" href="https://pubs.er.usgs.gov/publication/70017770"><span>Trace elements in tourmalines from massive <span class="hlt">sulfide</span> deposits and tourmalinites: Geochemical controls and exploration applications</span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Griffin, W.L.; Slack, J.F.; Ramsden, A.R.; Win, T.T.; Ryan, C.G.</p> <p>1996-01-01</p> <p>Trace element contents of tourmalines from massive <span class="hlt">sulfide</span> deposits and tourmalinites have been determined in situ by proton microprobe; >390 analyses were acquired from 32 polished thin sections. Concentrations of trace elements in the tourmalines vary widely, from <40 to 3,770 ppm Mn, <4 to 1,800 ppm Ni, <2 to 1,430 ppm Cu, <9 to 4,160 ppm Zn, 3 to 305 ppm Ga, <6 to 1,345 ppm Sr, <10 to 745 ppm Sn, <49 to 510 ppm Ba, and <3 to 4,115 ppm Pb. Individual grains and growth zones are relatively homogeneous, suggesting that these trace elements are contained within the crystal structure of the tourmaline, and are not present in inclusions. The highest <span class="hlt">base</span> <span class="hlt">metal</span> contents are in ore-related tourmaline samples from Kidd Creek (Ontario), Broken Hill (Australia), and Sazare (Japan). Tourmaline data from these and many other massive <span class="hlt">sulfide</span> deposits cluster by sample and display broadly linear trends on Zn vs. Fe plots, suggesting chemical control by temperature and hydrothermal and/or metamorphic fluid-mineral equilibria. Significant Ni occurs only in samples from the Kidd Creek Cu-Zn-Pb-Ag deposit, which is associated with a large footwall ultramafic body. An overall antithetic relationship between Zn and Ni probably reflects fluid source controls. Mn is correlated with Fe in tourmalines from barren associations, and possibly in some tourmalines associated with <span class="hlt">sulfide</span> vein deposits. Sn increases systematically with Fe content irrespective of association; the highest values are found in schorls from granites. Other trace elements are generally uncorrelated with major element concentrations (e.g., Sr-Ca). <span class="hlt">Base</span> <span class="hlt">metal</span> proportions in the tourmalines show systematic patterns on ternary Cu-Pb-Zn diagrams that correlate well with the major commodity <span class="hlt">metals</span> in the associated massive <span class="hlt">sulfide</span> deposits. For example, data for tourmalines from Cu-Zn deposits (e.g., Ming mine, Newfoundland) fall mainly on the Cu-Zn join, whereas those from Pb-Zn deposits (e.g., Broken Hill, Australia</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/23177655','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/23177655"><span>A physiologically <span class="hlt">based</span> kinetic model for bacterial <span class="hlt">sulfide</span> oxidation.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Klok, Johannes B M; de Graaff, Marco; van den Bosch, Pim L F; Boelee, Nadine C; Keesman, Karel J; Janssen, Albert J H</p> <p>2013-02-01</p> <p>In the biotechnological process for hydrogen <span class="hlt">sulfide</span> removal from gas streams, a variety of oxidation products can be formed. Under natron-alkaline conditions, <span class="hlt">sulfide</span> is oxidized by haloalkaliphilic <span class="hlt">sulfide</span> oxidizing bacteria via flavocytochrome c oxidoreductase. From previous studies, it was concluded that the oxidation-reduction state of cytochrome c is a direct measure for the bacterial end-product formation. Given this physiological feature, incorporation of the oxidation state of cytochrome c in a mathematical model for the bacterial oxidation kinetics will yield a physiologically <span class="hlt">based</span> model structure. This paper presents a physiologically <span class="hlt">based</span> model, describing the dynamic formation of the various end-products in the biodesulfurization process. It consists of three elements: 1) Michaelis-Menten kinetics combined with 2) a cytochrome c driven mechanism describing 3) the rate determining enzymes of the respiratory system of haloalkaliphilic <span class="hlt">sulfide</span> oxidizing bacteria. The proposed model is successfully validated against independent data obtained from biological respiration tests and bench scale gas-lift reactor experiments. The results demonstrate that the model is a powerful tool to describe product formation for haloalkaliphilic biomass under dynamic conditions. The model predicts a maximum S⁰ formation of about 98 mol%. A future challenge is the optimization of this bioprocess by improving the dissolved oxygen control strategy and reactor design. Copyright © 2012 Elsevier Ltd. All rights reserved.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2016NatSR...621951X','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2016NatSR...621951X"><span>Cyclodextrin-<span class="hlt">Based</span> <span class="hlt">Metal</span>-Organic Nanotube as Fluorescent Probe for Selective Turn-On Detection of Hydrogen <span class="hlt">Sulfide</span> in Living Cells <span class="hlt">Based</span> on H2S-Involved Coordination Mechanism</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Xin, Xuelian; Wang, Jingxin; Gong, Chuanfang; Xu, Hai; Wang, Rongming; Ji, Shijie; Dong, Hanxiao; Meng, Qingguo; Zhang, Liangliang; Dai, Fangna; Sun, Daofeng</p> <p>2016-02-01</p> <p>Hydrogen <span class="hlt">sulfide</span> (H2S) has been considered as the third biologically gaseous messenger (gasotransmitter) after nitric oxide (NO) and carbon monoxide (CO). Fluorescent detection of H2S in living cells is very important to human health because it has been found that the abnormal levels of H2S in human body can cause Alzheimer’s disease, cancers and diabetes. Herein, we develop a cyclodextrin-<span class="hlt">based</span> <span class="hlt">metal</span>-organic nanotube, CD-MONT-2, possessing a {Pb14} metallamacrocycle for efficient detection of H2S. CD-MONT-2‧ (the guest-free form of CD-MONT-2) exhibits turn-on detection of H2S with high selectivity and moderate sensitivity when the material was dissolved in DMSO solution. Significantly, CD-MONT-2‧ can act as a fluorescent turn-on probe for highly selective detection of H2S in living cells. The sensing mechanism in the present work is <span class="hlt">based</span> on the coordination of H2S as the auxochromic group to the central Pb(II) ion to enhance the fluorescence intensity, which is studied for the first time.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2017AGUFM.V43B0528R','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2017AGUFM.V43B0528R"><span>Platinum and Palladium Exsolution Textures in Quenched <span class="hlt">Sulfide</span> Melts</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Reo, G.; Frank, M. R.; Loocke, M. P.; Macey, C. J.</p> <p>2017-12-01</p> <p>Magmatic <span class="hlt">sulfide</span> ore deposits account for over 80% of the world's platinum group element (PGE) reserves. Layered mafic intrusions (LMIs), a type of magmatic <span class="hlt">sulfide</span> ore deposit, contain alternating layers of silicate and <span class="hlt">sulfide</span> mineralization that are thought to have coexisted as an immiscible silicate + <span class="hlt">sulfide</span> melt pair. Platinum and palladium, the most common PGEs found in LMIs, heavily favor the <span class="hlt">sulfide</span> melt. Nernst partition coefficients for Pt (D = wt% of Pt in <span class="hlt">sulfide</span>/wt% of Pt in silicate) range from 102 to 109. This study examined the Pt- and Pd-bearing phases that formed from the quenched <span class="hlt">sulfide</span> melts to better constrain the PGE-rich <span class="hlt">sulfide</span> layers of LMIs system. Experiments were conducted with a basalt melt, <span class="hlt">sulfide</span> melt, and Pt-Pd <span class="hlt">metal</span> in a vertical tube furnace at 1100°C and 1 atm and with oxygen fugacity buffered to QFM (quartz-fayalite-magnetite). Following the experiments, run products containing both <span class="hlt">sulfide</span> and silicate glasses (quenched melts) were analyzed by a Shimadzu EPMA-1720HT Electron Probe Microanalyzer. The focus here is on the quenched Fe-rich <span class="hlt">sulfides</span> whereas data on the partitioning of Pt and Pd between the coexisting silicate and <span class="hlt">sulfide</span> melts will be presented in the future. The <span class="hlt">sulfide</span> samples were imaged in back-scattering mode and major and trace element concentrations of separate <span class="hlt">metal</span>-rich phases in the <span class="hlt">sulfide</span> matrix were ascertained through wavelength-dispersive x-ray spectroscopy. Three discernable PGE-rich phases were found to have exsolved from the <span class="hlt">sulfide</span> matrix upon quenching of the <span class="hlt">sulfide</span> melt. All of these phases had Fe and S of 21-24 and 16-22 wt.%, respectively. An irregularly shaped Pd- and Cu-rich <span class="hlt">sulfide</span> phase ( 36 and 14 wt.%, respectively) makes up the majority of the exsolution product. A separate Pd- and Ni-rich phase ( 22 and 14 wt%, respectively) can be found as grains or rims adjacent to the exsolved Pd- and Cu-rich phase. A third Pd- and Pt-rich phase ( 26 and 18 wt.%, respectively) exhibits a</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/29291485','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/29291485"><span>Realizing high-rate sulfur reduction under sulfate-rich conditions in a biological <span class="hlt">sulfide</span> production system to treat <span class="hlt">metal</span>-laden wastewater deficient in organic matter.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Sun, Rongrong; Zhang, Liang; Zhang, Zefeng; Chen, Guang-Hao; Jiang, Feng</p> <p>2017-12-22</p> <p>Biological sulfur reduction can theoretically produce sufficient <span class="hlt">sulfide</span> to effectively remove and recover heavy <span class="hlt">metals</span> in the treatment of organics-deficient sulfate-rich <span class="hlt">metal</span>-laden wastewater such as acid mine drainage and metallurgic wastewater, using 75% less organics than biological sulfate reduction. However, it is still unknown whether sulfur reduction can indeed compete with sulfate reduction, particularly under high-strength sulfate conditions. The aim of this study was to investigate the long-term feasibility of biological sulfur reduction under high sulfate conditions in a lab-scale sulfur-reducing biological <span class="hlt">sulfide</span> production (BSP) system with sublimed sulfur added. In the 169-day trial, an average <span class="hlt">sulfide</span> production rate (SPR) as high as 47 ± 9 mg S/L-h was achieved in the absence of sulfate, and the average SPR under sulfate-rich conditions was similar (53 ± 10 mg S/L-h) when 1300 mg S/L sulfate were fed with the influent. Interestingly, sulfate was barely reduced even at such a high strength and contributed to only 1.5% of total <span class="hlt">sulfide</span> production. Desulfomicrobium was identified as the predominant sulfidogenic bacterium in the bioreactor. Batch tests further revealed that this sulfidogenic bacteria used elemental sulfur as the electron acceptor instead of the highly bioavailable sulfate, during which polysulfide acted as an intermediate, leading to an even higher bioavailability of sulfur than sulfate. The pathway of sulfur to <span class="hlt">sulfide</span> conversion via polysulfide in the presence of both sulfur and sulfate was discussed. Collectively, when conditions favor polysulfide formation, sulfur reduction can be a promising and attractive technology to realize a high-rate and low-cost BSP process for treating sulfate-rich <span class="hlt">metal</span>-laden wastewater. Copyright © 2017 Elsevier Ltd. All rights reserved.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/12480349','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/12480349"><span>Biomineralization of <span class="hlt">metal</span>-containing ores and concentrates.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Rawlings, Douglas E; Dew, David; du Plessis, Chris</p> <p>2003-01-01</p> <p>Biomining is the use of microorganisms to extract <span class="hlt">metals</span> from <span class="hlt">sulfide</span> and/or iron-containing ores and mineral concentrates. The iron and <span class="hlt">sulfide</span> is microbially oxidized to produce ferric iron and sulfuric acid, and these chemicals convert the insoluble <span class="hlt">sulfides</span> of <span class="hlt">metals</span> such as copper, nickel and zinc to soluble <span class="hlt">metal</span> sulfates that can be readily recovered from solution. Although gold is inert to microbial action, microbes can be used to recover gold from certain types of minerals because as they oxidize the ore, they open its structure, thereby allowing gold-solubilizing chemicals such as cyanide to penetrate the mineral. Here, we review a strongly growing microbially-<span class="hlt">based</span> <span class="hlt">metal</span> extraction industry, which uses either rapid stirred-tank or slower irrigation technology to recover <span class="hlt">metals</span> from an increasing range of minerals using a diversity of microbes that grow at a variety of temperatures.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/29310720','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/29310720"><span>Direct comparison of coronary bare <span class="hlt">metal</span> vs. drug-eluting stents: same platform, different mechanics?</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Schmidt, Wolfram; Lanzer, Peter; Behrens, Peter; Brandt-Wunderlich, Christoph; Öner, Alper; Ince, Hüseyin; Schmitz, Klaus-Peter; Grabow, Niels</p> <p>2018-01-08</p> <p>Drug-eluting stents (DES) compared to bare <span class="hlt">metal</span> stents (<span class="hlt">BMS</span>) have shown superior clinical performance, but are considered less suitable in complex cases. Most studies do not distinguish between DES and <span class="hlt">BMS</span> with respect to their mechanical performance. The objective was to obtain mechanical parameters for direct comparison of <span class="hlt">BMS</span> and DES. In vitro bench tests evaluated crimped stent profiles, crossability in stenosis models, elastic recoil, bending stiffness (crimped and expanded), and scaffolding properties. The study included five pairs of <span class="hlt">BMS</span> and DES each with the same stent platforms (all n = 5; PRO-Kinetic Energy, Orsiro: BIOTRONIK AG, Bülach, Switzerland; MULTI-LINK 8, XIENCE Xpedition: Abbott Vascular, Temecula, CA; REBEL Monorail, Promus PREMIER, Boston Scientific, Marlborough, MA; Integrity, Resolute Integrity, Medtronic, Minneapolis, MN; Kaname, Ultimaster: Terumo Corporation, Tokyo, Japan). Statistical analysis used pooled variance t tests for pairwise comparison of <span class="hlt">BMS</span> with DES. Crimped profiles in <span class="hlt">BMS</span> groups ranged from 0.97 ± 0.01 mm (PRO-Kinetic Energy) to 1.13 ± 0.01 mm (Kaname) and in DES groups from 1.02 ± 0.01 mm (Orsiro) to 1.13 ± 0.01 mm (Ultimaster). Crossability was best for low profile stent systems. Elastic recoil ranged from 4.07 ± 0.22% (Orsiro) to 5.87 ± 0.54% (REBEL Monorail) including both <span class="hlt">BMS</span> and DES. The bending stiffness of crimped and expanded stents showed no systematic differences between <span class="hlt">BMS</span> and DES neither did the scaffolding. <span class="hlt">Based</span> on in vitro measurements <span class="hlt">BMS</span> appear superior to DES in some aspects of mechanical performance, yet the differences are small and not class uniform. The data provide assistance in selecting the optimal system for treatment and assessment of new generations of bioresorbable scaffolds. not applicable.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2012AGUFMOS13D1762Y','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2012AGUFMOS13D1762Y"><span>UV-Fluorescent Sensing for Primary Selection of <span class="hlt">Metal</span>-rich Seafloor Massive <span class="hlt">Sulfide</span> Ore</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Yamazaki, T.; Nakatani, T.; Nakatani, N.; Arai, R.</p> <p>2012-12-01</p> <p>Seafloor massive <span class="hlt">sulfides</span> (SMS) in the western Pacific have received much attention as resources for Au, Ag, Cu, Zn, and Pb. Because of the higher <span class="hlt">metal</span> contents, the venture commercial mining project may start in 2013 in the East Manus Basin, Papua New Guinea. One of important problems to be solved is reducing the waste rock disposal costs for the economy. The best location for the reducing is on seafloor just after the excavation of SMS ores. The authors select UV-fluorescent sensing for primary selection of the ores, because no additional environmental impact is created with the application of the method. First of all, the effectiveness of the UV-fluorescent sensing by a combination system with a UV-light and a camera (See attached figure) in deep water condition is clarified. Then many UV-fluorescent data of SMS ore, SMS accompanied rock, and seafloor rock samples are collected. In the analyses phase, the ore and rock samples are classified into some groups by applying the cluster analysis to the <span class="hlt">metal</span> contents at first. Then, using the UV fluorescent color brightness and contrasts of the ore and rock samples, the discriminant analysis <span class="hlt">based</span> on Mahalanobis distance is applied. The higher possibility to identify the SMS ores containing valuable <span class="hlt">metals</span> from camera image is suggested from the analyses. When additional UV-fluorescent and chemical assay data are obtained, the renewal of discriminant analysis is necessary. Therefore, the results and conclusions described in this study are tentative ones.; UV-fluorescent sensing</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/23103903','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/23103903"><span>Potentiation of oxycodone antinociception in mice by agmatine and <span class="hlt">BMS</span>182874 via an imidazoline I2 receptor-mediated mechanism.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Bhalla, Shaifali; Ali, Izna; Lee, Hyaera; Andurkar, Shridhar V; Gulati, Anil</p> <p>2013-01-01</p> <p>The potentiation of oxycodone antinociception by <span class="hlt">BMS</span>182874 (endothelin-A (ET(A)) receptor antagonist) and agmatine (imidazoline receptor/α(2)-adrenoceptor agonist) is well-documented. It is also known that imidazoline receptors but not α(2)-adrenoceptors are involved in potentiation of oxycodone antinociception by agmatine and <span class="hlt">BMS</span>182874 in mice. However, the involvement of specific imidazoline receptor subtypes (I(1), I(2), or both) in this interaction is not clearly understood. The present study was conducted to determine the involvement of imidazoline I(1) and I(2) receptors in agmatine- and <span class="hlt">BMS</span>182874-induced potentiation of oxycodone antinociception in mice. Antinociceptive (tail flick and hot-plate) latencies were determined in male Swiss Webster mice treated with oxycodone, agmatine, <span class="hlt">BMS</span>182874, and combined administration of oxycodone with agmatine or <span class="hlt">BMS</span>182874. Efaroxan (imidazoline I(1) receptor antagonist) and BU224 (imidazoline I(2) receptor antagonist) were used to determine the involvement of I(1) and I(2) imidazoline receptors, respectively. Oxycodone produced significant antinociceptive response in mice which was not affected by efaroxan but was blocked by BU224. Agmatine-induced potentiation of oxycodone antinociception was blocked by BU224 but not by efaroxan. Similarly, <span class="hlt">BMS</span>182874-induced potentiation of oxycodone antinociception was blocked by BU224 but not by efaroxan. This is the first report demonstrating that <span class="hlt">BMS</span>182874- or agmatine-induced enhancement of oxycodone antinociception is blocked by BU224 but not by efaroxan. We conclude that imidazoline I(2) receptors but not imidazoline I(1) receptors are involved in <span class="hlt">BMS</span>182874- and agmatine-induced potentiation of oxycodone antinociception in mice. Copyright © 2012 Elsevier Inc. All rights reserved.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/17258281','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/17258281"><span><span class="hlt">Sulfidation</span> treatment of molten incineration fly ashes with Na2S for zinc, lead and copper resource recovery.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Kuchar, D; Fukuta, T; Onyango, M S; Matsuda, H</p> <p>2007-04-01</p> <p>The present study focuses on the conversion of heavy <span class="hlt">metals</span> involved in molten incineration fly ashes to <span class="hlt">metal</span> <span class="hlt">sulfides</span> which could be thereafter separated by flotation. The <span class="hlt">sulfidation</span> treatment was carried out for five molten incineration fly ashes (Fly ash-A to Fly ash-E) by contacting each fly ash with Na(2)S solution for a period of 10 min to 6h. The initial molar ratio of S(2-) to Me(2+) was adjusted to 1.20. The conversion of heavy <span class="hlt">metals</span> to <span class="hlt">metal</span> <span class="hlt">sulfides</span> was evaluated by measuring the S(2-) residual concentrations using an ion selective electrode. The formation of <span class="hlt">metal</span> <span class="hlt">sulfides</span> was studied by XRD and SEM-EDS analyses. In the case of Fly ash-A to Fly ash-D, more than 79% of heavy <span class="hlt">metals</span> of zinc, lead and copper was converted to <span class="hlt">metal</span> <span class="hlt">sulfides</span> within the contacting period of 0.5h owing to a fast conversion of <span class="hlt">metal</span> chlorides to <span class="hlt">metal</span> <span class="hlt">sulfides</span>. By contrast, the conversion of about 35% was achieved for Fly ash-E within the same contacting period, which was attributed to a high content of <span class="hlt">metal</span> oxides. Further, the S(2-) to Me(2+) molar ratio was reduced to 1.00 to minimize Na(2)S consumption and the conversions obtained within the contacting period of 0.5h varied from 76% for Fly ash-D to 91% for Fly ash-C. Finally, soluble salts such as NaCl and KCl were removed during the <span class="hlt">sulfidation</span> treatment, which brought about a significant enrichment in <span class="hlt">metals</span> content by a factor varying from 1.5 for Fly ash-D to 4.9 for Fly ash-A.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.dtic.mil/docs/citations/ADA529056','DTIC-ST'); return false;" href="http://www.dtic.mil/docs/citations/ADA529056"><span>New <span class="hlt">Sulfide</span> Compounds MeXMn1-XS (Me=3d <span class="hlt">Metal</span>) with the Colossal Magnetoresistance Effect</span></a></p> <p><a target="_blank" href="http://www.dtic.mil/">DTIC Science & Technology</a></p> <p></p> <p>2006-05-19</p> <p>is to synthesize the new MeXMn1-XS (Me=3d-<span class="hlt">metal</span>) <span class="hlt">sulfide</span> compounds and to study the electrical, magnetic and magnetoresistive properties . Recently...oxide compounds of manganese (LaMnO3-type) with perovskite structure have been intensively investigated. This interest is caused by the observation of... properties of the materials with different structure. It is known that alpha - MnS manganese monosulfide, similar to LaMnO3, has the specific</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2012EGUGA..14.6972C','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2012EGUGA..14.6972C"><span>Inhibition of <span class="hlt">Sulfide</span> Mineral Oxidation by Surface Coating Agents: Batch</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Choi, J.; Ji, M. K.; Yun, H. S.; Park, Y. T.; Gee, E. D.; Lee, W. R.; Jeon, B.-H.</p> <p>2012-04-01</p> <p>Mining activities and mineral industries have impacted on rapid oxidation of <span class="hlt">sulfide</span> minerals such as pyrite (FeS2) which leads to Acid Mine Drainage (AMD) formation. Some of the abandoned mines discharge polluted water without proper environmental remediation treatments, largely because of financial constraints in treating AMD. Magnitude of the problem is considerable, especially in countries with a long history of mining. As <span class="hlt">metal</span> <span class="hlt">sulfides</span> become oxidized during mining activities, the aqueous environment becomes acid and rich in many <span class="hlt">metals</span>, including iron, lead, mercury, arsenic and many others. The toxic heavy <span class="hlt">metals</span> are responsible for the environmental deterioration of stream, groundwater and soils. Several strategies to remediate AMD contaminated sites have been proposed. Among the source inhibition and prevention technologies, microencapsulation (coating) has been considered as a promising technology. The encapsulation is <span class="hlt">based</span> on inhibition of O2 diffusion by surface coating agent and is expected to control the oxidation of pyrite for a long time. Potential of several surface coating agents for preventing oxidation of <span class="hlt">metal</span> <span class="hlt">sulfide</span> minerals from both Young-Dong coal mine and Il-Gwang gold mine were examined by conducting batch experiments and field tests. Powdered pyrite as a standard <span class="hlt">sulfide</span> mineral and rock samples from two mine outcrops were mixed with six coating agents (KH2PO4, MgO and KMnO4 as chemical agents, and apatite, cement and manganite as mineral agents) and incubated with oxidizing agents (H2O2 or NaClO). Batch experiments with Young-Dong coal mine samples showed least SO42- production in presence of KMnO4 (16% sulfate production compared to no surface coating agents) or cement (4%) within 8 days. In the case of Il-Gwang mine samples, least SO42- production was observed in presence of KH2PO4 (8%) or cement (2%) within 8 days. Field-scale pilot tests at Il-Gwang site also showed that addition of KH2PO4 decreased sulfate production from 200 to</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4760871','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4760871"><span>Iron <span class="hlt">Sulfide</span> Attenuates the Methanogenic Toxicity of Elemental Copper and Zinc Oxide Nanoparticles and their Soluble <span class="hlt">Metal</span> Ion Analogs</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Gonzalez-Estrella, Jorge; Gallagher, Sara; Sierra-Alvarez, Reyes; Field, Jim A.</p> <p>2016-01-01</p> <p>Elemental copper (Cu0) and zinc oxide (ZnO) nanoparticle (NP) toxicity to methanogens has been attributed to the release of soluble <span class="hlt">metal</span> ions. Iron <span class="hlt">sulfide</span> (FeS) partially controls the soluble concentration of heavy <span class="hlt">metals</span> and their toxicity in aquatic environments. Heavy <span class="hlt">metals</span> displace the Fe from FeS forming poorly soluble <span class="hlt">metal</span> <span class="hlt">sulfides</span> in the FeS matrix. Therefore, FeS may be expected to attenuate the NP toxicity. This work assessed FeS as an attenuator of the methanogenic toxicity of Cu0 and ZnO NPs and their soluble salt analogs. The toxicity attenuation capacity of fine (25–75 µm) and coarse (500 to 1200 µm) preparations of FeS (FeS-f and FeS-c respectively) was tested in the presence of highly inhibitory concentrations of CuCl2, ZnCl2 Cu0 and ZnO NPs. FeS-f attenuated methanogenic toxicity better than FeS-c. The results revealed that 2.5× less FeS-f than FeS-c was required to recover the methanogenic activity to 50% (activity normalized to uninhibited controls). The results also indicated that a molar FeS-f/Cu0 NP, FeS-f/ZnO NP, FeS-f/ZnCl2, and FeS-f/CuCl2 ratio of 2.14, 2.14, 4.28, and 8.56 respectively, was necessary to recover the methanogenic activity to >75%. Displacement experiments demonstrated that CuCl2 and ZnCl2 partially displaced Fe from FeS. As a whole, the results indicate that not all the <span class="hlt">sulfide</span> in FeS was readily available to react with the soluble Cu and Zn ions which may explain the need for a large stoichiometric excesses of FeS to highly attenuate Cu and Zn toxicity. Overall, this study provides evidence that FeS attenuates the toxicity caused by Cu0 and ZnO NPs and their soluble ion analogs to methanogens. PMID:26803736</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/26597930','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/26597930"><span>The Efficacy of Daily Prefrontal Repetitive Transcranial Magnetic Stimulation (rTMS) for Burning Mouth Syndrome (<span class="hlt">BMS</span>): A Randomized Controlled Single-blind Study.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Umezaki, Yojiro; Badran, Bashar W; DeVries, William H; Moss, Jkeonye; Gonzales, Theresa; George, Mark S</p> <p>2016-01-01</p> <p>Burning mouth syndrome (<span class="hlt">BMS</span>) is a burning oral sensation without any corresponding abnormal findings. In some cases, <span class="hlt">BMS</span> is refractory to pharmacologic treatments. Repetitive transcranial magnetic stimulation (rTMS) over left prefrontal cortex induces analgesic effect in both acute and chronic pain. However, its effect for <span class="hlt">BMS</span> has not been evaluated. The aim of this randomized, controlled, single-blind study was to assess the efficacy of prefrontal rTMS for <span class="hlt">BMS</span>. Twenty patients with <span class="hlt">BMS</span> were recruited and randomized to receive 30,000 pulses in total at 10 Hz TMS (n = 12) or sham TMS (n = 8). We assessed the change of <span class="hlt">BMS</span> pain condition, functional status and mood until 2 months after the beginning of treatment. In the real group, the <span class="hlt">BMS</span> pain intensity decreased 67%, and 75% of the patients reported >50% pain decrease on final assessment compared to baseline, without heavy side effects. There was significant pain reduction in subjects in the real group immediately after 1 week of treatment, whereas there was none in those in the sham group. Similar tendency was confirmed in change of functional status. Mood and the affective aspect of pain were not changed in this study. <span class="hlt">BMS</span> pain was significantly improved with 2 weeks of treatment of high frequency rTMS over left DLPFC compared to sham stimulation. Further study is needed to refine and improve TMS as a potential treatment of <span class="hlt">BMS</span>. Copyright © 2016 Elsevier Inc. All rights reserved.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2015JETP..121.1067D','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2015JETP..121.1067D"><span>Optimization of the superconducting phase of hydrogen <span class="hlt">sulfide</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Degtyarenko, N. N.; Masur, E. A.</p> <p>2015-12-01</p> <p>The electron and phonon spectra, as well as the densities of electron and phonon states of the SH3 phase and the stable orthorhombic structure of hydrogen <span class="hlt">sulfide</span> SH2, are calculated for the pressure interval 100-225 GPa. It is found that the I4/ mmm phase can be responsible for the superconducting properties of <span class="hlt">metallic</span> hydrogen <span class="hlt">sulfide</span> along with the SH3 phase. Sequential stages for obtaining and conservation of the SH2 phase are proposed. The properties of two (SH2 and SH3) superconducting phases of hydrogen <span class="hlt">sulfide</span> are compared.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/19720004338','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/19720004338"><span>Integrated thin film cadmium <span class="hlt">sulfide</span> solar cell module</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Mickelsen, R. A.; Abbott, D. D.</p> <p>1971-01-01</p> <p>The design, development, fabrication and tests of flexible integrated thin-film cadmium <span class="hlt">sulfide</span> solar cells and modules are discussed. The development of low cost and high production rate methods for interconnecting cells into large solar arrays is described. Chromium thin films were applied extensively in the deposited cell structures as a means to: (1) achieve high adherence between the cadmium <span class="hlt">sulfide</span> films and the vacuum-<span class="hlt">metallized</span> copper substrates, (2) obtain an ohmic contact to the cadmium <span class="hlt">sulfide</span> films, and (3) improve the adherence of gold films as grids or contact areas.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/24933904','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/24933904"><span><span class="hlt">Metal</span> uptake by native plants and revegetation potential of mining <span class="hlt">sulfide</span>-rich waste-dumps.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Gomes, Patrícia; Valente, Teresa; Pamplona, Jorge; Braga, Maria Amália Sequeira; Pissarra, José; Gil, José António Grande; de la Torre, Maria Luisa</p> <p>2014-01-01</p> <p>Waste dumps resulting from <span class="hlt">metal</span> exploitation create serious environmental damage, providing soil and water degradation over long distances. Phytostabilization can be used to remediate these mining sites. The present study aims to evaluate the behavior of selected plant species (Erica arborea, Ulex europaeus, Agrostis delicatula, and Cytisus multiflorus) that grow spontaneously in three <span class="hlt">sulfide</span>-rich waste-dumps (Lapa Grande, Cerdeirinha, and Penedono, Portugal). These sites represent different geological, climatic and floristic settings. The results indicate distinctive levels and types of <span class="hlt">metal</span> contamination: Penedono presents highest sulfate and <span class="hlt">metal</span> contents, especially As, with low levels of Fe. In contrast, at Lapa Grande and Cerdeirinha Fe, Mn, and Zn are the dominant <span class="hlt">metals</span>. In accordance, each waste dump develops a typical plant community, providing a specific vegetation inventory. At Penedono, Agrostis delicatula accumulates As, Pb, Cu, Mn, and Zn, showing higher bioaccumulation factors (BF) for Mn (32.1) and As (24.4). At Cerdeirinha, Ulex europaeus has the highest BF for Pb (984), while at Lapa Grande, Erica arborea presents high BF for Mn (9.8) and Pb (8.1). Regarding TF, low values were obtained for most of the <span class="hlt">metals</span>, especially As (TF < 1). Therefore, the results obtained from representative plant species suggest appropriate behavior for phytostabilization measures.</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_8");'>8</a></li> <li><a href="#" onclick='return showDiv("page_9");'>9</a></li> <li class="active"><span>10</span></li> <li><a href="#" onclick='return showDiv("page_11");'>11</a></li> <li><a href="#" onclick='return showDiv("page_12");'>12</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_10 --> <div id="page_11" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_9");'>9</a></li> <li><a href="#" onclick='return showDiv("page_10");'>10</a></li> <li class="active"><span>11</span></li> <li><a href="#" onclick='return showDiv("page_12");'>12</a></li> <li><a href="#" onclick='return showDiv("page_13");'>13</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="201"> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/biblio/576777-heavy-metals-acid-volatile-sulfides-sediments-tijuana-estuary','SCIGOV-STC'); return false;" href="https://www.osti.gov/biblio/576777-heavy-metals-acid-volatile-sulfides-sediments-tijuana-estuary"><span>Heavy <span class="hlt">metals</span> and acid-volatile <span class="hlt">sulfides</span> in sediments of the Tijuana Estuary</span></a></p> <p><a target="_blank" href="http://www.osti.gov/search">DOE Office of Scientific and Technical Information (OSTI.GOV)</a></p> <p>Meyer, S.F.; Gersberg, R.M.</p> <p>1997-12-31</p> <p>The Tijuana Estuary in San Diego County, CA is a wetland-dominated estuary, which has been designated a National Estuarine Sanctuary for protection of a number of endangered species and their habitat. For decades, raw sewage from the city of Tijuana, Mexico has flowed into the Tijuana River and across the international border into the Tijuana Estuary. This problem has worsened in recent years with the substantial growth of Tijuana`s population along with intensive industrial development. Unfortunately, due to many factors, an industrial pretreatment program similar to one implemented in the United States, has not been initiated in Mexico, and themore » threat of chemical contamination of the Tijuana Estuary exists. To date, however, the degree and spatial nature of such contamination has not been well assessed. We report here on the levels of selected toxic <span class="hlt">metals</span> in the sediments of the estuary. Additionally, we measured both acid-volatile <span class="hlt">sulfides</span> (AVS) and simultaneously extracted <span class="hlt">metals</span> (SEM) in order to estimate the potential toxicity of these estuarine sediments.« less</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/20116151','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/20116151"><span>The relation between Acid Volatile <span class="hlt">Sulfides</span> (AVS) and <span class="hlt">metal</span> accumulation in aquatic invertebrates: implications of feeding behavior and ecology.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>De Jonge, Maarten; Blust, Ronny; Bervoets, Lieven</p> <p>2010-05-01</p> <p>The present study evaluates the relationship between Acid Volatile <span class="hlt">Sulfides</span> (AVS) and <span class="hlt">metal</span> accumulation in invertebrates with different feeding behavior and ecological preferences. Natural sediments, pore water and surface water, together with benthic and epibenthic invertebrates were sampled at 28 Flemish lowland rivers. Different <span class="hlt">metals</span> as well as <span class="hlt">metal</span> binding sediment characteristics including AVS were measured and multiple regression was used to study their relationship with accumulated <span class="hlt">metals</span> in the invertebrates taxa. Bioaccumulation in the benthic taxa was primarily influenced by total <span class="hlt">metal</span> concentrations in the sediment. Regarding the epibenthic taxa <span class="hlt">metal</span> accumulation was mostly explained by the more bioavailable <span class="hlt">metal</span> fractions in both the sediment and the water. AVS concentrations were generally better correlated with <span class="hlt">metal</span> accumulation in the epibenthic invertebrates, rather than with the benthic taxa. Our results indicated that the relation between AVS and <span class="hlt">metal</span> accumulation in aquatic invertebrates is highly dependent on feeding behavior and ecology. Copyright 2010 Elsevier Ltd. All rights reserved.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/23080088','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/23080088"><span>The effect of stent coating on stent deliverability: direct randomised comparison of drug eluting and bare <span class="hlt">metal</span> stents using the same stent platform.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Siminiak, Tomasz; Link, Rafał; Wołoszyn, Maciej; Kałmucki, Piotr; Baszko, Artur</p> <p>2012-01-01</p> <p>There is certain experimental and clinical evidence indicating that the covering of bare <span class="hlt">metal</span> stents (<span class="hlt">BMS</span>) with drug eluting polymers to produce drug eluting stents (DES) results in increased stent stiffness and modifies the mechanical properties of the stent platform. In addition, it has been speculated that the mechanical performance of DES, compared to <span class="hlt">BMS</span>, may be related to the type of polymer used to cover stents. We aimed at evaluating the deliverability of DES with a lactate <span class="hlt">based</span> biodegradable polymer and <span class="hlt">BMS</span> in patients with stable coronary artery disease in a prospective randomised study. One hundred eleven consecutive patients (age: 36-77, mean 58.8 years) scheduled for routine angioplasty due to stable coronary disease were randomised to receive <span class="hlt">BMS</span> (Chopin II(TM), Balton, Poland) or paclitaxel eluting stent (Chopin Luc(TM), Balton, Poland) using the same <span class="hlt">metal</span> platform. Only patients scheduled for angioplasty using the direct implantation technique of a single stent were randomised. The exclusion criteria included patients 〉 80 years, multivessel disease and reference diameter of the target vessel 〉 3.5 mm. In the <span class="hlt">BMS</span> group (n = 55; 35 males and 20 females), the mean diameter of implanted stents was 3.09 ± 0.40 and the mean length was 11.37 ± 2.80, whereas in the DES group (n = 56; 34 males and 22 females) the mean stent sizes were 3.02 ± 0.34 and 17.90 ± 7.38 mm, respectively (p 〉 0.05 for length). The groups did not significantly differ regarding the frequency of stent implantation to particular coronary vessels. The direct stenting technique was attempted and failed, leading to the stents' implantation after predilatation in five patients in the <span class="hlt">BMS</span> group and six patients in the DES group. Failure of stent implantation and subsequent implantation of another stent type was observed in no <span class="hlt">BMS</span> patients and in one DES patient (NS). Although stent covering with lactate <span class="hlt">based</span> drug eluting polymer may increase its stiffness, it does not affect</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://pubs.er.usgs.gov/publication/70017402','USGSPUBS'); return false;" href="https://pubs.er.usgs.gov/publication/70017402"><span>Dissolved <span class="hlt">sulfides</span> in the oxic water column of San Francisco Bay, California</span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Kuwabara, J.S.; Luther, G.W.</p> <p>1993-01-01</p> <p>Trace contaminants enter major estuaries such as San Francisco Bay from a variety of point and nonpoint sources and may then be repartitioned between solid and aqueous phases or altered in chemical speciation. Chemical speciation affects the bioavailability of <span class="hlt">metals</span> as well as organic ligands to planktonic and benthic organisms, and the partitioning of these solutes between phases. Our previous, work in south San Francisco Bay indicated that <span class="hlt">sulfide</span> complexation with <span class="hlt">metals</span> may be of particular importance because of the thermodynamic stability of these complexes. Although the water column of the bay is consistently well-oxygenated and typically unstratified with respect to dissolved oxygen, the kinetics of <span class="hlt">sulfide</span> oxidation could exert at least transient controls on <span class="hlt">metal</span> speciation. Our initial data on dissolved <span class="hlt">sulfides</span> in the main channel of both the northern and southern components of the bay consistently indicate submicromolar concenrations (from <1 nM to 162 nM), as one would expect in an oxidizing environment. However, chemical speciation calculations over the range of observed <span class="hlt">sulfide</span> concentrations indicate that these trace concentrations in the bay water column can markedly affect chemical speciation of ecologically significant trace <span class="hlt">metals</span> such as cadmium, copper, and zinc.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/23979732','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/23979732"><span>In vitro cross-resistance profile of nucleoside reverse transcriptase inhibitor (NRTI) <span class="hlt">BMS</span>-986001 against known NRTI resistance mutations.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Li, Zhufang; Terry, Brian; Olds, William; Protack, Tricia; Deminie, Carol; Minassian, Beatrice; Nowicka-Sans, Beata; Sun, Yongnian; Dicker, Ira; Hwang, Carey; Lataillade, Max; Hanna, George J; Krystal, Mark</p> <p>2013-11-01</p> <p><span class="hlt">BMS</span>-986001 is a novel HIV nucleoside reverse transcriptase inhibitor (NRTI). To date, little is known about its resistance profile. In order to examine the cross-resistance profile of <span class="hlt">BMS</span>-986001 to NRTI mutations, a replicating virus system was used to examine specific amino acid mutations known to confer resistance to various NRTIs. In addition, reverse transcriptases from 19 clinical isolates with various NRTI mutations were examined in the Monogram PhenoSense HIV assay. In the site-directed mutagenesis studies, a virus containing a K65R substitution exhibited a 0.4-fold change in 50% effective concentration (EC50) versus the wild type, while the majority of viruses with the Q151M constellation (without M184V) exhibited changes in EC50 versus wild type of 0.23- to 0.48-fold. Susceptibility to <span class="hlt">BMS</span>-986001 was also maintained in an L74V-containing virus (0.7-fold change), while an M184V-only-containing virus induced a 2- to 3-fold decrease in susceptibility. Increasing numbers of thymidine analog mutation pattern 1 (TAM-1) pathway mutations correlated with decreases in susceptibility to <span class="hlt">BMS</span>-986001, while viruses with TAM-2 pathway mutations exhibited a 5- to 8-fold decrease in susceptibility, regardless of the number of TAMs. A 22-fold decrease in susceptibility to <span class="hlt">BMS</span>-986001 was observed in a site-directed mutant containing the T69 insertion complex. Common non-NRTI (NNRTI) mutations had little impact on susceptibility to <span class="hlt">BMS</span>-986001. The results from the site-directed mutants correlated well with the more complicated genotypes found in NRTI-resistant clinical isolates. Data from clinical studies are needed to determine the clinically relevant resistance cutoff values for <span class="hlt">BMS</span>-986001.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://ntrs.nasa.gov/search.jsp?R=19840045680&hterms=MOSFET&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D40%26Ntt%3DMOSFET','NASA-TRS'); return false;" href="https://ntrs.nasa.gov/search.jsp?R=19840045680&hterms=MOSFET&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D40%26Ntt%3DMOSFET"><span>Lead <span class="hlt">sulfide</span> - Silicon MOSFET infrared focal plane development</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Barrett, J. R.; Jhabvala, M. D.</p> <p>1983-01-01</p> <p>A process for directly integrating photoconductive lead <span class="hlt">sulfide</span> (PbS) infrared detector material with silicon MOS integrated circuits has been developed primarily for application in long (greater than 10,000 detector elements) linear arrays for pushbroom scanning applications. The processing technology is <span class="hlt">based</span> on the conventional PMOS and CMOS technologies with a variation in the <span class="hlt">metallization</span>. Results and measurements on a fully integrated eight-element multiplexer are shown.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2017AIPC.1831b0032S','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2017AIPC.1831b0032S"><span>Battery management systems (<span class="hlt">BMS</span>) optimization for electric vehicles (EVs) in Malaysia</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Salehen, P. M. W.; Su'ait, M. S.; Razali, H.; Sopian, K.</p> <p>2017-04-01</p> <p>Following the UN Climate Change Conference 2009 in Copenhagen, Denmark, Malaysia seriously committed on "Go Green" campaign with the aim to reduce 40% GHG emission by the year 2020. Therefore, the National Green Technology Policy has been legalised in 2009 with transportation as one of its focused sectors, which include hybrid (HEVs), electric vehicles (EVs) and fuel cell vehicles with the purpose of to keep up with the worst scenario. While the number of registered cars has been increasing by 1 million yearly, the amount has doubled in the last two decades. Consequently, CO2 emission in Malaysia reaches up to 97.1% and will continue to increase mainly due to the activities in the transportation sector. Nevertheless, Malaysia is now moving towards on green car which battery-<span class="hlt">based</span> EVs. This type of transportation mainly needs power performance optimization, which is controlled by the Batteries Management System (<span class="hlt">BMS</span>). <span class="hlt">BMS</span> is an essential module which leads to reliable power management, optimal power performance and safe vehicle that lead back for power optimization in EVs. Thus, this paper proposes power performance optimization for various setups of lithium-ion cathode with graphene anode using MATLAB/SIMULINK software for better management performance and extended EVs driving range.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/1988GeCoA..52..751A','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/1988GeCoA..52..751A"><span>Complete oxidation of solid phase <span class="hlt">sulfides</span> by manganese and bacteria in anoxic marine sediments</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Aller, Robert C.; Rude, Peter D.</p> <p>1988-03-01</p> <p>During the physical or biological reworking of surficial marine sediments, <span class="hlt">metal</span> oxides are often brought into contact with both solid and dissolved <span class="hlt">sulfides</span>. Experiments simulating these mixing processes demonstrate that in natural sediments Mn-oxides can completely oxidize solid phase <span class="hlt">sulfides</span> to SO 4- under anoxic conditions. The major source of sulfur is probably acid volatile <span class="hlt">sulfide</span>. Minerals containing Mn +4 are apparently more effective than Mn +3 in driving the oxidation. There is slight or no evidence for complete <span class="hlt">sulfide</span> oxidation by Fe-oxides under similar conditions. The reaction is inhibited by DNP (dinitrophenol) and azide, implying biological mediation by a group of chemolithotrophic bacteria such as the thiobacilli, having a well-organized cytochrome system, oxidative phosphorylation coupled with <span class="hlt">sulfide</span> oxidation, and possibly aulolrophic CO 2 fixation. Lack of sensitivity to chlorate suggests that a No 3- reductase complex is not involved. Because of <span class="hlt">metal</span> reduction and the overall stoichiometry of reaction, this <span class="hlt">sulfide</span> oxidation causes a rise in pH in contrast to oxidation by O 2. Alkalinity is also simultaneously depeleted by Mn, Ca carbonate precipitation. Both manganoan kutnahorite and manganoan calcite are observed to form rapidly (days) during Mn reduction. The oxidation of <span class="hlt">sulfides</span> by Mn-oxides is likely to be important, but highly variable, in organic-rich shelf sediments and environments such as hydrothermal vents where <span class="hlt">sulfidic</span> plumes contact oxidized <span class="hlt">metals</span>. A substantial Proportion of sedimentary <span class="hlt">sulfide</span> may be oxidized and Mn reduced by this pathway, particularly in bioturbated sediments. The relative roles of lithotrophic (S) and heterotrophic (C) Mn-reduction in marine sediments are presently unknown.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/biblio/894862-chemical-bonding-sulfide-minerals','SCIGOV-STC'); return false;" href="https://www.osti.gov/biblio/894862-chemical-bonding-sulfide-minerals"><span>Chemical Bonding in <span class="hlt">Sulfide</span> Minerals</span></a></p> <p><a target="_blank" href="http://www.osti.gov/search">DOE Office of Scientific and Technical Information (OSTI.GOV)</a></p> <p>Vaughan, David J.; Rosso, Kevin M.</p> <p></p> <p>An understanding of chemical bonding and electronic structure in <span class="hlt">sulfide</span> minerals is central to any attempt at understanding their crystal structures, stabilities and physical properties. It is also an essential precursor to understanding reactivity through modeling surface structure at the molecular scale. In recent decades, there have been remarkable advances in first principles (ab initio) methods for the quantitative calculation of electronic structure. These advances have been made possible by the very rapid development of high performance computers. Several review volumes that chart the applications of these developments in mineralogy and geochemistry are available (Tossell and Vaughan, 1992; Cygan andmore » Kubicki, 2001). An important feature of the <span class="hlt">sulfide</span> minerals is the diversity of their electronic structures, as evidenced by their electrical and magnetic properties (see Pearce et al. 2006, this volume). Thus, <span class="hlt">sulfide</span> minerals range from insulators through semiconductors to <span class="hlt">metals</span>, and exhibit every type of magnetic behavior. This has presented problems for those attempting to develop bonding models for <span class="hlt">sulfides</span>, and also led to certain misconceptions regarding the kinds of models that may be appropriate. In this chapter, chemical bonding and electronic structure models for <span class="hlt">sulfides</span> are reviewed with emphasis on more recent developments. Although the fully ab initio quantitative methods are now capable of a remarkable degree of sophistication in terms of agreement with experiment and potential to interpret and predict behavior with varying conditions, both qualitative and more simplistic quantitative approaches will also be briefly discussed. This is because we believe that the insights which they provide are still helpful to those studying <span class="hlt">sulfide</span> minerals. In addition to the application of electronic structure models and calculations to solid <span class="hlt">sulfides</span>, work on <span class="hlt">sulfide</span> mineral surfaces (Rosso and Vaughan 2006a,b) and solution complexes and clusters</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/1991DSRA...38S1121L','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/1991DSRA...38S1121L"><span>Sulfur speciation and <span class="hlt">sulfide</span> oxidation in the water column of the Black Sea</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Luther, George W., III; Church, Thomas M.; Powell, David</p> <p></p> <p>We have applied sulfur speciation techniques to understand the chemistry and cycling of sulfur in Black Sea waters. The only reduced dissolved inorganic sulfur species detected (above the low minimum detection limits of the voltammetric methods employed) in the water column was hydrogen <span class="hlt">sulfide</span>. The maximum concentration of <span class="hlt">sulfide</span> (423 μM) is similar to previous reports. Using a cathodic stripping square wave voltammetry (CSSWV) method for nanomolar levels of <span class="hlt">sulfide</span>, we determined the precise boundary between the "free" hydrogen <span class="hlt">sulfide</span> (<span class="hlt">sulfidic</span>) zone and the upper (oxic/suboxic) water column at the two stations studied. This boundary has apparently moved up by about 50 m in the past 20 years. Our results help demonstrate three chemically distinct zones of water in the central basin of the Black Sea: (1) the oxic [0-65 m], (2) the anoxic/nonsulfidic [65-100 m] and (3) the <span class="hlt">sulfidic</span> [>100 m]. <span class="hlt">Sulfide</span> bound to <span class="hlt">metals</span> ("complexed" <span class="hlt">sulfide</span>) is observed in both the oxic and anoxic/nonsulfidic zones of the water column. This supports previous studies on <span class="hlt">metal</span> <span class="hlt">sulfide</span> forms. From the electrochemical data, it is possible to estimate the strength of the complexation of <span class="hlt">sulfide</span> to <span class="hlt">metals</span> (log K = 10 to 11). Thiosulfate and sulfite were below our minimum detectable limit (MDL) of 50 nM using CSSWV. Elemental sulfur (MDL 5 nM) was detected below the onset of the hydrogen <span class="hlt">sulfide</span> zone (90-100 m) with a maximum of 30-60 nM near 120 m. The sulfur speciation results for the Black Sea are lower by one order of magnitude or more than other marine systems such as the Cariaco Trench and salt marshes. New HPLC techniques were applied to detect thiols at submicromolar levels. The presence of thiols (2-mercaptoethylamine, 2-mercaptoethanol, N-acetylcysteine and glutathione) is correlated with the remineralization of organic matter at the oxic and anoxic/nonsulfidic interface. Water samples collected from the upper 50 m of the <span class="hlt">sulfidic</span> zone showed significant <span class="hlt">sulfide</span> oxidation on</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/servlets/purl/865589','DOE-PATENT-XML'); return false;" href="https://www.osti.gov/servlets/purl/865589"><span>Cell design for lithium alloy/<span class="hlt">metal</span> <span class="hlt">sulfide</span> battery</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Kaun, Thomas D.</p> <p>1985-01-01</p> <p>The disclosed lithium alloy/iron <span class="hlt">sulfide</span> cell design provides loop-like positive and negative sheet <span class="hlt">metal</span> current collectors electrically insulated from one another by separator means, the positive collector being located outwardly of the negative collector. The collectors are initially secured within an open-ended cell housing, which allows for collector pretesting for electrical shorts prior to adding any electrode materials and/or electrolyte to the cell. Separate chambers are defined outwardly of the positive collector and inwardly of the negative collector open respectively in opposite directions toward the open ends of the cell housing; and positive and negative electrode materials can be extruded into these respective chambers via the opposite open housing ends. The chambers and cell housing ends can then be sealed closed. A cross wall structurally reinforces the cell housing and also thereby defines two cavities, and paired positive and negative collectors are disposed in each cavity and electrically connected in parallel. The cell design provides for a high specific energy output and improved operating life in that any charge-discharge cycle swelling of the positive electrode material will be inwardly against only the positive collector to minimize shorts caused by the collectors shifting relative to one another.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=2860217','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=2860217"><span>The melanocortin MC1 receptor agonist <span class="hlt">BMS</span>-470539 inhibits leucocyte trafficking in the inflamed vasculature</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Leoni, G; Voisin, M-B; Carlson, K; Getting, SJ; Nourshargh, S; Perretti, M</p> <p>2010-01-01</p> <p>Background and purpose: Over three decades of research evaluating the biology of melanocortin (MC) hormones and synthetic peptides, activation of the MC type 1 (MC1) receptor has been identified as a viable target for the development of novel anti-inflammatory therapeutic agents. Here, we have tested a recently described selective agonist of MC1 receptors, <span class="hlt">BMS</span>-470539, on leucocyte/post-capillary venule interactions in murine microvascular beds. Experimental approach: Intravital microscopy of two murine microcirculations were utilized, applying two distinct modes of promoting inflammation. The specificity of the effects of <span class="hlt">BMS</span>-470539 was assessed using mice bearing mutant inactive MC1 receptors (the recessive yellow e/e colony). Key results: <span class="hlt">BMS</span>-470539, given before an ischaemia–reperfusion protocol, inhibited cell adhesion and emigration with no effect on cell rolling, as assessed 90 min into the reperfusion phase. These properties were paralleled by inhibition of tissue expression of both CXCL1 and CCL2. Confocal investigations of inflamed post-capillary venules revealed immunostaining for MC1 receptors on adherent and emigrated leucocytes. Congruently, the anti-inflammatory properties of <span class="hlt">BMS</span>-470539 were lost in mesenteries of mice bearing the inactive mutant MC1 receptors. Therapeutic administration of <span class="hlt">BMS</span>-470539 stopped cell emigration, but did not affect cell adhesion in the cremasteric microcirculation inflamed by superfusion with platelet-activating factor. Conclusions and implications: Activation of MC1 receptors inhibited leucocyte adhesion and emigration. Development of new chemical entities directed at MC1 receptors could be a viable approach in the development of novel anti-inflammatory therapeutic agents with potential application to post-ischaemic conditions. PMID:20331604</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/servlets/purl/1165247','SCIGOV-STC'); return false;" href="https://www.osti.gov/servlets/purl/1165247"><span>Comparison of Data Quality of NOAA's ISIS and SURFRAD Networks to NREL's SRRL-<span class="hlt">BMS</span></span></a></p> <p><a target="_blank" href="http://www.osti.gov/search">DOE Office of Scientific and Technical Information (OSTI.GOV)</a></p> <p>Anderberg, M.; Sengupta, M.</p> <p>2014-11-01</p> <p>This report provides analyses of broadband solar radiometric data quality for the National Oceanic and Atmospheric Administration's Integrated Surface Irradiance Study and Surface Radiation Budget Network (SURFRAD) solar measurement networks. The data quality of these networks is compared to that of the National Renewable Energy Laboratory's Solar Radiation Research Laboratory Baseline Measurement System (SRRL-<span class="hlt">BMS</span>) native data resolutions and hourly averages of the data from the years 2002 through 2013. This report describes the solar radiometric data quality testing and flagging procedures and the method used to determine and tabulate data quality statistics. Monthly data quality statistics for each network weremore » plotted by year against the statistics for the SRRL-<span class="hlt">BMS</span>. Some of the plots are presented in the body of the report, but most are in the appendix. These plots indicate that the overall solar radiometric data quality of the SURFRAD network is superior to that of the Integrated Surface Irradiance Study network and can be comparable to SRRL-<span class="hlt">BMS</span>.« less</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/17936333','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/17936333"><span>A comparison of sediment quality results with acid volatile <span class="hlt">sulfide</span> (AVS) and simultaneously extracted <span class="hlt">metals</span> (SEM) ratio in Vojvodina (Serbia) sediments.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Prica, M; Dalmacija, B; Roncević, S; Krcmar, D; Becelić, M</p> <p>2008-01-25</p> <p>The acid-volatile <span class="hlt">sulfide</span> (AVS), simultaneously extracted <span class="hlt">metals</span> (SEM), total <span class="hlt">metals</span>, and pore-water <span class="hlt">metal</span> concentrations were studied in Vojvodina (Serbia) sediments. In Serbia, there are no regulations concerning sediment quality standards and sediment management. Harmonization of legislation in the domain of environmental protection with EU requirements will increase the significance of the sediment issue. Sediment quality was assessed according to Dutch standards, but the results were also compared with Canadian and USEPA (United States Environmental Protection Agency) guidelines for sediment quality. A comparison of the results <span class="hlt">based</span> on different criteria for sediment quality assessment shows that they are sometimes contradictory. Therefore, a single approach to quality assessment may be insufficient. The Sigma[SEM]/[AVS] ratio was found to be greater than one at several locations that were already recognized as places of high risk <span class="hlt">based</span> on Dutch standards. Some other samples had Sigma[SEM]/[AVS]<1, despite of the high risk classification <span class="hlt">based</span> on the Dutch evaluation. However, not all sediments with Sigma[SEM]/[AVS]>1 can cause increased toxicity because there are many other <span class="hlt">metal</span>-binding phases in sediments. <span class="hlt">Metals</span> that are associated with AVS may be released within sediments through storms, dredging activities, oxidation, etc., and may have adverse environmental impacts. This has to be taken into account during dredging, which is for some sediments necessary because the sediment is of class 4 (Dutch evaluation), because the dredging process will certainly increase the concentration of bioavailable heavy <span class="hlt">metals</span> and disturb the sedimentation dynamics. The obtained results will be invaluable for future activities regarding dredging and sediment management in the country.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/20100008519','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/20100008519"><span>In Situ Determination of Siderophile Trace Elements in <span class="hlt">Metals</span> and <span class="hlt">Sulfides</span> in Enstatite Achondrites</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>vanAcken, D.; Humayun, M.; Brandon, A. D.; Peslier, A.</p> <p>2010-01-01</p> <p>Enstatite meteorites are identified by their extremely reduced mineralogy (1) and similar oxygen isotope composition (2). The enstatite meteorite clan incorporates both EH and EL chondrites, as well as a wide variety of enstatite achondrites, such as aubrites or anomalous enstatite meteorites (e.g. Mt. Egerton, Shallowater, Zaklodzie, NWA 2526). The role of nebular versus planetary processes in the formation of enstatite meteorites is still under debate (e.g. 3-5). Past studies showed a significant influence of <span class="hlt">metal</span> segregation in the formation of enstatite achondrites. Casanova et al. (6) suggested incomplete <span class="hlt">metal</span>-silicate segregation during core formation and attributed the unfractionated siderophile element patterns in aubrites <span class="hlt">metals</span> to a lack of fractional crystallization in a planetary core. Recent studies suggest a significant role of impact melting in the formation of primitive enstatite chondrites (7) and identified NWA 2526 as a partial melt residue of an enstatite chondrite (8). To understand the nature of siderophile element-bearing phases in enstatite achondrites, establish links between enstatite achondrites and enstatite chondrites (9), and constrain planetary differentiation on their respective parent bodies and their petrogenetic histories, we present laser ablation ICP-MS measurements of <span class="hlt">metal</span> and <span class="hlt">sulfide</span> phases in Shallowater, Mt. Egerton, and the aubrites Aubres, Cumberland Falls, and Mayo Belwa.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/27812240','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/27812240"><span>Investigation of the H2S poisoning process for sensing composite material <span class="hlt">based</span> on carbon nanotubes and <span class="hlt">metal</span> oxides.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Duan, Yichen; Pirolli, Laurent; Teplyakov, Andrew V</p> <p>2016-11-01</p> <p>The poisoning of H 2 S sensing material <span class="hlt">based</span> on the mixture of acid-treated carbon nanotubes, CuO and SnO 2 was investigated by exposing the material to high doses of H 2 S (1% in volume) and following the changes spectroscopically. The presence of <span class="hlt">metal</span> <span class="hlt">sulfides</span> (CuS and SnS 2 ), sulfates and thiols was confirmed on the surface of this material as the result of H 2 S poisoning. Further study revealed that leaving this material in air for extended period of time led to reoxidation of <span class="hlt">metal</span> <span class="hlt">sulfides</span> back to <span class="hlt">metal</span> oxides. The formation of thiols and sulfates directly on carbon nanotubes is not reversible under these conditions; however, the extent of the overall surface reaction in this case is substantially lower than that for the composite material.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/servlets/purl/1109469','DOE-PATENT-XML'); return false;" href="https://www.osti.gov/servlets/purl/1109469"><span>Subsurface heaters with low <span class="hlt">sulfidation</span> rates</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>John, Randy Carl; Vinegar, Harold J</p> <p>2013-12-10</p> <p>A system for heating a hydrocarbon containing formation includes a heater having an elongated ferromagnetic <span class="hlt">metal</span> heater section. The heater is located in an opening in a formation. The heater section is configured to heat the hydrocarbon containing formation. The exposed ferromagnetic <span class="hlt">metal</span> has a <span class="hlt">sulfidation</span> rate that goes down with increasing temperature of the heater, when the heater is in a selected temperature range.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2017EGUGA..19.6838B','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2017EGUGA..19.6838B"><span>A <span class="hlt">sulfide</span>-saturated lunar mantle?</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Brenan, James M.; Mungall, James E.</p> <p>2017-04-01</p> <p>Although much work has been done to understand the controls on the sulfur content at <span class="hlt">sulfide</span> saturation (SCSS) for terrestrial melt compositions, little information exists to evaluate the SCSS for the high FeO compositions typical of lunar magmas, and at the reduced conditions of the Moon's interior. Experiments were done to measure the SCSS for a model low Ti mare basalt with 20 wt% FeO at 1400oC as a function of fO2 and pressure. Synthetic lunar basalt was encapsulated along with stoichiometric FeS in capsules made from Fe-Ir alloy. The fO2 of the experiment can be estimated by the heterogeneous equilibrium: Femetal + 1 /2 O2 = FeOsilicate Variation in the <span class="hlt">metal</span> composition, by addition of Ir, serves to change the fO2 of the experiment. Capsule compositions spanning the range Fe25Ir75 to Fe96Ir4 (at%) were synthesized by sintering of pressed powders under reducing conditions. Fe100 capsules were fabricated from pure Fe rod. For a melt with 20 wt% FeO, this range in capsule composition spans the fO2 interval of ˜IW-1 (Fe100, Fe96Ir4) to IW+2.2 (Fe25Ir75). Experiments were done over the pressure interval of 0.1 MPa to 2 GPa. Results for experiments involving Fe100capsules indicate that the SCSS decreases from ˜2000 ppm (0.1 MPa) to 700 ppm (2 GPa). Experiments done thus far at 1 GPa, involving the range of capsule compositions indicated, show a marked decrease in SCSS as the Fe content of the capsule increases (fO2 decreases). Complementary to the decrease in SCSS is a drop in the sulfur content of the coexisting <span class="hlt">sulfide</span> melt, from ˜50 at% at ΔIW = +2.2 to ˜20 at% at ΔIW-1. In fact, both the composition of the <span class="hlt">sulfide</span> melt and the SCSS are essentially indistinguishable for Fe96Ir4 and Fe100 compositions. Results thus far indicate that at reduced conditions and high pressure, the SCSS for high FeO lunar compositions is low, and overlaps with Apollo 11 melt inclusion data. Importantly, such low SCSS does not require Fe <span class="hlt">metal</span> saturation, and suggests that some</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=5620736','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=5620736"><span>A Behaviour Monitoring System (<span class="hlt">BMS</span>) for Ambient Assisted Living</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Eisa, Samih</p> <p>2017-01-01</p> <p>Unusual changes in the regular daily mobility routine of an elderly person at home can be an indicator or early symptom of developing health problems. Sensor technology can be utilised to complement the traditional healthcare systems to gain a more detailed view of the daily mobility of a person at home when performing everyday tasks. We hypothesise that data collected from low-cost sensors such as presence and occupancy sensors can be analysed to provide insights on the daily mobility habits of the elderly living alone at home and to detect routine changes. We validate this hypothesis by designing a system that automatically learns the daily room-to-room transitions and permanence habits in each room at each time of the day and generates alarm notifications when deviations are detected. We present an algorithm to process the sensors’ data streams and compute sensor-driven features that describe the daily mobility routine of the elderly as part of the developed Behaviour Monitoring System (<span class="hlt">BMS</span>). We are able to achieve low detection delay with confirmation time that is high enough to convey the detection of a set of common abnormal situations. We illustrate and evaluate <span class="hlt">BMS</span> with synthetic data, generated by a developed data generator that was designed to mimic different user’s mobility profiles at home, and also with a real-life dataset collected from prior research work. Results indicate <span class="hlt">BMS</span> detects several mobility changes that can be symptoms of common health problems. The proposed system is a useful approach for learning the mobility habits at the home environment, with the potential to detect behaviour changes that occur due to health problems, and therefore, motivating progress toward behaviour monitoring and elder’s care. PMID:28837105</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/servlets/purl/929708','SCIGOV-STC'); return false;" href="https://www.osti.gov/servlets/purl/929708"><span>Spectral induced polarization and electrodic potential monitoring of microbially mediated iron <span class="hlt">sulfide</span> transformations</span></a></p> <p><a target="_blank" href="http://www.osti.gov/search">DOE Office of Scientific and Technical Information (OSTI.GOV)</a></p> <p>Hubbard, Susan; Personna, Y.R.; Ntarlagiannis, D.</p> <p>2008-02-15</p> <p>Stimulated sulfate-reduction is a bioremediation technique utilized for the sequestration of heavy <span class="hlt">metals</span> in the subsurface.We performed laboratory column experiments to investigate the geoelectrical response of iron <span class="hlt">sulfide</span> transformations by Desulfo vibriovulgaris. Two geoelectrical methods, (1) spectral induced polarization (SIP), and (2) electrodic potential measurements, were investigated. Aqueous geochemistry (sulfate, lactate, <span class="hlt">sulfide</span>, and acetate), observations of precipitates (identified from electron microscopy as iron <span class="hlt">sulfide</span>), and electrodic potentials on bisulfide ion (HS) sensitive silver-silver chloride (Ag-AgCl) electrodes (630 mV) were diagnostic of induced transitions between an aerobic iron <span class="hlt">sulfide</span> forming conditions and aerobic conditions promoting iron <span class="hlt">sulfide</span> dissolution. The SIP datamore » showed 10m rad anomalies during iron <span class="hlt">sulfide</span> mineralization accompanying microbial activity under an anaerobic transition. These anomalies disappeared during iron <span class="hlt">sulfide</span> dissolution under the subsequent aerobic transition. SIP model parameters <span class="hlt">based</span> on a Cole-Cole relaxation model of the polarization at the mineral-fluid interface were converted to (1) estimated biomineral surface area to pore volume (Sp), and (2) an equivalent polarizable sphere diameter (d) controlling the relaxation time. The temporal variation in these model parameters is consistent with filling and emptying of pores by iron <span class="hlt">sulfide</span> biofilms, as the system transitions between anaerobic (pore filling) and aerobic (pore emptying) conditions. The results suggest that combined SIP and electrodic potential measurements might be used to monitor spatiotemporal variability in microbial iron <span class="hlt">sulfide</span> transformations in the field.« less</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_9");'>9</a></li> <li><a href="#" onclick='return showDiv("page_10");'>10</a></li> <li class="active"><span>11</span></li> <li><a href="#" onclick='return showDiv("page_12");'>12</a></li> <li><a href="#" onclick='return showDiv("page_13");'>13</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_11 --> <div id="page_12" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_10");'>10</a></li> <li><a href="#" onclick='return showDiv("page_11");'>11</a></li> <li class="active"><span>12</span></li> <li><a href="#" onclick='return showDiv("page_13");'>13</a></li> <li><a href="#" onclick='return showDiv("page_14");'>14</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="221"> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/pages/biblio/1433998-understanding-initial-irreversibility-metal-sulfides-sodium-ion-batteries-via-operando-techniques','SCIGOV-DOEP'); return false;" href="https://www.osti.gov/pages/biblio/1433998-understanding-initial-irreversibility-metal-sulfides-sodium-ion-batteries-via-operando-techniques"><span>Understanding the initial irreversibility of <span class="hlt">metal</span> <span class="hlt">sulfides</span> for sodium-ion batteries via operando techniques</span></a></p> <p><a target="_blank" href="http://www.osti.gov/pages">DOE PAGES</a></p> <p>Wang, Liguang; Wang, Jiajun; Guo, Fangmin; ...</p> <p>2018-11-13</p> <p>Transition <span class="hlt">metal</span> <span class="hlt">sulfides</span> are promising high capacity anodes for sodium-ion batteries in terms of the conversion reaction with multiple alkali <span class="hlt">metal</span> ions. Nonetheless, some inherent challenges such as sluggish sodium ion diffusion kinetics, large volume change, and poor cycle stability limit their implementation. Addressing these issues necessitates a comprehensive understanding the complex sodium ion storage mechanism particularly at the initial cycle. Here, taking nickel subsulfide as a model material, we reveal the complicated conversion reaction mechanism upon the first cycle by combining in operando 2D transmission X-ray microscopy with X-ray absorption spectroscopy, ex-situ 3D nano-tomography, high-energy X-ray diffraction and electrochemicalmore » impedance spectroscopy. This study demonstrates that the microstructure evolution, inherent slow sodium ions diffusion kinetics, and slow ion mobility at the two-phase interface contribute to the high irreversible capacity upon the first cycle. Finally, such understandings are critical for developing the conversion reaction materials with the desired electrochemical activity and stability.« less</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/biblio/1433998-understanding-initial-irreversibility-metal-sulfides-sodium-ion-batteries-via-operando-techniques','SCIGOV-STC'); return false;" href="https://www.osti.gov/biblio/1433998-understanding-initial-irreversibility-metal-sulfides-sodium-ion-batteries-via-operando-techniques"><span>Understanding the initial irreversibility of <span class="hlt">metal</span> <span class="hlt">sulfides</span> for sodium-ion batteries via operando techniques</span></a></p> <p><a target="_blank" href="http://www.osti.gov/search">DOE Office of Scientific and Technical Information (OSTI.GOV)</a></p> <p>Wang, Liguang; Wang, Jiajun; Guo, Fangmin</p> <p></p> <p>Transition <span class="hlt">metal</span> <span class="hlt">sulfides</span> are promising high capacity anodes for sodium-ion batteries in terms of the conversion reaction with multiple alkali <span class="hlt">metal</span> ions. Nonetheless, some inherent challenges such as sluggish sodium ion diffusion kinetics, large volume change, and poor cycle stability limit their implementation. Addressing these issues necessitates a comprehensive understanding the complex sodium ion storage mechanism particularly at the initial cycle. Here, taking nickel subsulfide as a model material, we reveal the complicated conversion reaction mechanism upon the first cycle by combining in operando 2D transmission X-ray microscopy with X-ray absorption spectroscopy, ex-situ 3D nano-tomography, high-energy X-ray diffraction and electrochemicalmore » impedance spectroscopy. This study demonstrates that the microstructure evolution, inherent slow sodium ions diffusion kinetics, and slow ion mobility at the two-phase interface contribute to the high irreversible capacity upon the first cycle. Finally, such understandings are critical for developing the conversion reaction materials with the desired electrochemical activity and stability.« less</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://pubs.er.usgs.gov/publication/70031992','USGSPUBS'); return false;" href="https://pubs.er.usgs.gov/publication/70031992"><span>Effects of acid-volatile <span class="hlt">sulfide</span> on <span class="hlt">metal</span> bioavailability and toxicity to midge (Chironomus tentans) larvae in black shale sediments</span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Ogendi, G.M.; Brumbaugh, W.G.; Hannigan, R.E.; Farris, J.L.</p> <p>2007-01-01</p> <p><span class="hlt">Metal</span> bioavailability and toxicity to aquatic organisms are greatly affected by variables such as pH, hardness, organic matter, and sediment acid-volatile <span class="hlt">sulfide</span> (AVS). Sediment AVS, which reduces <span class="hlt">metal</span> bioavailability and toxicity by binding and immobilizing <span class="hlt">metals</span> as insoluble <span class="hlt">sulfides</span>, has been studied intensely in recent years. Few studies, however, have determined the spatial variability of AVS and its interaction with simultaneously extracted <span class="hlt">metals</span> (SEM) in sediments containing elevated concentrations of <span class="hlt">metals</span> resulting from natural geochemical processes, such as weathering of black shales. We collected four sediment samples from each of four headwater bedrock streams in northcentral Arkansa (USA; three black shale-draining streams and one limestone-draining stream). We conducted 10-d acute whole-sediment toxicity tests using the midge Chironomus tentans and performed analyses for AVS, total <span class="hlt">metals</span>, SEMs, and organic carbon. Most of the sediments from shale-draining streams had similar total <span class="hlt">metal</span> and SEM concentrations but considerable differences in organic carbon and AVS. Zinc was the leading contributor to the SEM molar sum, averaging between 68 and 74%, whereas lead and cadmium contributed less than 3%. The AVS concentration was very low in all but two samples from one of the shale streams, and the sum of the SEM concentrations was in molar excess of AVS for all shale stream sediments. No significant differences in mean AVS concentrations between sediments collected from shale-draining or limestone-draining sites were noted (p > 0.05). Midge survival and growth in black shale-derived sediments were significantly less (p < 0.001) than that of limestone-derived sediments. On the whole, either SEM alone or SEM-AVS explained the total variation in midge survival and growth about equally well. However, survival and growth were significantly greater (p < 0.05) in the two sediment samples that contained measurable AVS compared with the two sediments from the</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/biblio/6225979','DOE-PATENT-XML'); return false;" href="https://www.osti.gov/biblio/6225979"><span>Hydrogen-permeable composite <span class="hlt">metal</span> membrane and uses thereof</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Edlund, D.J.; Friesen, D.T.</p> <p>1993-06-08</p> <p>Various hydrogen production and hydrogen <span class="hlt">sulfide</span> decomposition processes are disclosed that utilize composite <span class="hlt">metal</span> membranes that contain an intermetallic diffusion barrier separating a hydrogen-permeable <span class="hlt">base</span> <span class="hlt">metal</span> and a hydrogen-permeable coating <span class="hlt">metal</span>. The barrier is a thermally stable inorganic proton conductor.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/16206860','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/16206860"><span>Simulation of <span class="hlt">sulfide</span> buildup in wastewater and atmosphere of sewer networks.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Nielsen, A H; Yongsiri, C; Hvitved-Jacobsen, T; Vollertsen, J</p> <p>2005-01-01</p> <p>A model concept for prediction of <span class="hlt">sulfide</span> buildup in sewer networks is presented. The model concept is an extension to--and a further development of--the WATS model (Wastewater Aerobic-anaerobic Transformations in Sewers), which has been developed by Hvitved-Jacobsen and co-workers at Aalborg University. In addition to the sulfur cycle, the WATS model simulates changes in dissolved oxygen and carbon fractions of different biodegradability. The sulfur cycle was introduced via six processes: 1. <span class="hlt">sulfide</span> production taking place in the biofilm covering the permanently wetted sewer walls; 2. biological <span class="hlt">sulfide</span> oxidation in the permanently wetted biofilm; 3. chemical and biological <span class="hlt">sulfide</span> oxidation in the water phase; 4. <span class="hlt">sulfide</span> precipitation with <span class="hlt">metals</span> present in the wastewater; 5. emission of hydrogen <span class="hlt">sulfide</span> to the sewer atmosphere and 6. adsorption and oxidation of hydrogen <span class="hlt">sulfide</span> on the moist sewer walls where concrete corrosion may take place.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://eric.ed.gov/?q=temperature+AND+learning&pg=4&id=EJ820857','ERIC'); return false;" href="https://eric.ed.gov/?q=temperature+AND+learning&pg=4&id=EJ820857"><span>The Empirical Formula of Silver <span class="hlt">Sulfide</span>: An Experiment for Introductory Chemistry</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Trujillo, Carlos Alexander</p> <p>2007-01-01</p> <p>An experiment is described that allows students to experimentally determine an empirical formula for silver <span class="hlt">sulfide</span>. At elevated temperatures, silver <span class="hlt">sulfide</span> reacts in air to form silver, silver sulfate, and sulfur dioxide. At higher temperatures (960 [degree]C) silver sulfate decomposes to produce <span class="hlt">metallic</span> silver. (Contains 1 figure and 1 table.)</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/27613290','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/27613290"><span>Bioavailability assessment of toxic <span class="hlt">metals</span> using the technique "acid-volatile <span class="hlt">sulfide</span> (AVS)-simultaneously extracted <span class="hlt">metals</span> (SEM)" in marine sediments collected in Todos os Santos Bay, Brazil.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Silva, Jucelino B; Nascimento, Rodrigo A; de Oliva, Sergio T; de Oliveira, Olívia M C; Ferreira, Sergio L C</p> <p>2015-10-01</p> <p>This paper reports the bioavailability of the <span class="hlt">metals</span> (cadmium, copper, zinc, lead, and nickel) in sediment samples collected in seven stations from the São Paulo Estuary, Todos os Santos Bay, Brazil. The bioavailability was determined by employing the technique "acid-volatile <span class="hlt">sulfide</span> (AVS) and simultaneously extracted <span class="hlt">metal</span> (SEM)". The elements cadmium, copper, lead, and zinc were determined using differential pulse anodic stripping voltammetry (DPASV), while nickel was quantified utilizing electrothermal atomic absorption spectrometry (ET AAS). The accuracy of these methods was confirmed using a certified reference material of estuarine sediment (NIST 1646). The <span class="hlt">sulfide</span> was quantified using potentiometry with selective electrode and the organic matter determination employing an indirect volumetric method using potassium dichromate and iron(II) sulfate solutions. The bioavailability of the <span class="hlt">metals</span> was estimated by relationship between the concentration of AVS and the sum of the concentrations of the simultaneously extracted <span class="hlt">metals</span> (ΣSEM), considering a significant toxicity when (ΣSEM)/(AVS) is higher than 1. The bioavailability values in the seven stations studied varied from 0.93 to 1.31 (June, 2014) and from 0.34 to 0.58 (September, 2014). These results demonstrated a critical condition of toxicity (bioavailability >1) in six of the seven sediment samples collected during the rainy season (June, 2014). In the other period (September, 2014), the bioavailability was always lower than 1 for all sediment samples collected in the seven stations. The individual values of the concentrations of the five <span class="hlt">metals</span> were compared with the parameters PEL (probable effects level) and TEL (threshold effects level), which are commonly employed for characterization of ecological risk in environmental systems. This comparison revealed that all <span class="hlt">metals</span> have concentrations lower than the PEL and only zinc and lead in some stations have contents higher than the TEL. The</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://ntrs.nasa.gov/search.jsp?R=20040087409&hterms=bacterial+photosynthesis&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D20%26Ntt%3Dbacterial%2Bphotosynthesis','NASA-TRS'); return false;" href="https://ntrs.nasa.gov/search.jsp?R=20040087409&hterms=bacterial+photosynthesis&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D20%26Ntt%3Dbacterial%2Bphotosynthesis"><span>Variation in <span class="hlt">sulfide</span> tolerance of photosystem II in phylogenetically diverse cyanobacteria from <span class="hlt">sulfidic</span> habitats</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Miller, Scott R.; Bebout, Brad M.</p> <p>2004-01-01</p> <p>Physiological and molecular phylogenetic approaches were used to investigate variation among 12 cyanobacterial strains in their tolerance of <span class="hlt">sulfide</span>, an inhibitor of oxygenic photosynthesis. Cyanobacteria from <span class="hlt">sulfidic</span> habitats were found to be phylogenetically diverse and exhibited an approximately 50-fold variation in photosystem II performance in the presence of <span class="hlt">sulfide</span>. Whereas the degree of tolerance was positively correlated with <span class="hlt">sulfide</span> levels in the environment, a strain's phenotype could not be predicted from the tolerance of its closest relatives. These observations suggest that <span class="hlt">sulfide</span> tolerance is a dynamic trait primarily shaped by environmental variation. Despite differences in absolute tolerance, similarities among strains in the effects of <span class="hlt">sulfide</span> on chlorophyll fluorescence induction indicated a common mode of toxicity. <span class="hlt">Based</span> on similarities with treatments known to disrupt the oxygen-evolving complex, it was concluded that <span class="hlt">sulfide</span> toxicity resulted from inhibition of the donor side of photosystem II.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2016NatSR...626203C','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2016NatSR...626203C"><span>Structural effects of naphthalimide-<span class="hlt">based</span> fluorescent sensor for hydrogen <span class="hlt">sulfide</span> and imaging in live zebrafish</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Choi, Seon-Ae; Park, Chul Soon; Kwon, Oh Seok; Giong, Hoi-Khoanh; Lee, Jeong-Soo; Ha, Tai Hwan; Lee, Chang-Soo</p> <p>2016-05-01</p> <p>Hydrogen <span class="hlt">sulfide</span> (H2S) is an important biological messenger, but few biologically-compatible methods are available for its detection in aqueous solution. Herein, we report a highly water-soluble naphthalimide-<span class="hlt">based</span> fluorescent probe (L1), which is a highly versatile building unit that absorbs and emits at long wavelengths and is selective for hydrogen <span class="hlt">sulfide</span> over cysteine, glutathione, and other reactive sulfur, nitrogen, and oxygen species in aqueous solution. We describe turn-on fluorescent probes <span class="hlt">based</span> on azide group reduction on the fluorogenic ‘naphthalene’ moiety to fluorescent amines and intracellular hydrogen <span class="hlt">sulfide</span> detection without the use of an organic solvent. L1 and L2 were synthetically modified to functional groups with comparable solubility on the N-imide site, showing a marked change in turn-on fluorescent intensity in response to hydrogen <span class="hlt">sulfide</span> in both PBS buffer and living cells. The probes were readily employed to assess intracellular hydrogen <span class="hlt">sulfide</span> level changes by imaging endogenous hydrogen <span class="hlt">sulfide</span> signal in RAW264.7 cells incubated with L1 and L2. Expanding the use of L1 to complex and heterogeneous biological settings, we successfully visualized hydrogen <span class="hlt">sulfide</span> detection in the yolk, brain and spinal cord of living zebrafish embryos, thereby providing a powerful approach for live imaging for investigating chemical signaling in complex multicellular systems.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/29172444','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/29172444"><span><span class="hlt">Metal</span>-Free Cataluminescence Gas Sensor for Hydrogen <span class="hlt">Sulfide</span> <span class="hlt">Based</span> on Its Catalytic Oxidation on Silicon Carbide Nanocages.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Wu, Liqian; Zhang, Lichun; Sun, Mingxia; Liu, Rui; Yu, Lingzhu; Lv, Yi</p> <p>2017-12-19</p> <p>Cataluminescence- (CTL-) <span class="hlt">based</span> sensors are among the most attractive and effective tools for gas sensing, owing to their efficient selectivity, high sensitivity, and rapidity. As the sensing materials of CTL-<span class="hlt">based</span> sensors, <span class="hlt">metal-based</span> catalysts easily bring about high costs and environmental pollution of heavy <span class="hlt">metals</span>. More importantly, the long-term stability of <span class="hlt">metal-based</span> catalysts is usually rather poor. <span class="hlt">Metal</span>-free catalysts have unique advantages such as environmental friendliness, low costs, and long-term stability, making them promising materials for CTL-<span class="hlt">based</span> sensors. Herein, we report the fabrication of a CTL sensor <span class="hlt">based</span> on a <span class="hlt">metal</span>-free catalyst. F-doped cage-like SiC was synthesized by wet chemical etching. The as-prepared products showed a rapid, stable, highly selective, and sensitive cataluminescent response to H 2 S. The stability of the sensor was demonstrated to be fairly good for at least 15 days. After CTL tests, F-doped cage-like SiC retained its original morphology, structure, and chemical composition. In addition, to the best of our knowledge, this is the first report of a <span class="hlt">metal</span>-free CTL sensor. <span class="hlt">Metal</span>-free catalysts are environmentally friendly and low in cost and exhibit long-term stability, which could open a new avenue of CTL sensing.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=5089814','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=5089814"><span>Investigation of the H2S poisoning process for sensing composite material <span class="hlt">based</span> on carbon nanotubes and <span class="hlt">metal</span> oxides</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Duan, Yichen; Pirolli, Laurent; Teplyakov, Andrew V.</p> <p>2016-01-01</p> <p>The poisoning of H2S sensing material <span class="hlt">based</span> on the mixture of acid-treated carbon nanotubes, CuO and SnO2 was investigated by exposing the material to high doses of H2S (1% in volume) and following the changes spectroscopically. The presence of <span class="hlt">metal</span> <span class="hlt">sulfides</span> (CuS and SnS2), sulfates and thiols was confirmed on the surface of this material as the result of H2S poisoning. Further study revealed that leaving this material in air for extended period of time led to reoxidation of <span class="hlt">metal</span> <span class="hlt">sulfides</span> back to <span class="hlt">metal</span> oxides. The formation of thiols and sulfates directly on carbon nanotubes is not reversible under these conditions; however, the extent of the overall surface reaction in this case is substantially lower than that for the composite material. PMID:27812240</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2002PhDT.......153D','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2002PhDT.......153D"><span>Molecular precursor routes to transition <span class="hlt">metal</span> <span class="hlt">sulfides</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Dinnage, Christopher Walker</p> <p></p> <p>This thesis is primarily concerned with the synthesis of homoleptic early transition meta thiolates and the subsequent preparation of bulk and thin-film <span class="hlt">metal</span> disulfides from these compounds. Chapter 1 gives an introduction into the properties, preparation procedures and uses of bulk and thin-film transition <span class="hlt">metal</span> disulfides as well as giving an overview of early transition <span class="hlt">metal</span> thiolates synthesied so far in the literature (for titanium, zirconium, tantalum and niobium). Chapter 2 is concerned with the synthesis of a number of ionic and neutral transition <span class="hlt">metal</span> thiolates. The main synthetic methodologies discussed in this chapter include substitution reactions of transition <span class="hlt">metal</span> amides and alkyls with thiols, salt metathesis reactions of transition <span class="hlt">metal</span> chlorides with alkali <span class="hlt">metal</span> thiolates or with a <span class="hlt">base</span> / thiol and the use of Grignard reagents. Chapter 3 discusses the preparation of bulk transition <span class="hlt">metal</span> disulfides using the thiolates prepared in the previous chapter via a thio "sol-gel" route. The preparation of a range of bulk <span class="hlt">metal</span> and mixed-<span class="hlt">metal</span> disulfides using transition <span class="hlt">metal</span> chlorides and hexamethyldisilathiane is also discussed in this chapter. Finally, chapter 4 is concerned with the attempted preparation of thin-films of some transition <span class="hlt">metal</span> disulfides. Decomposition studies of some of the thiolates prepared in chapter 2 are discussed using thermal gravimetric analysis. Vapour-phase deposition studies are also explored in order to test the potential of the transition <span class="hlt">metal</span> thiolates as precursors to the disulfides. Experiments using low-pressure chemical vapour deposition and aerosol-assisted chemical vapour deposition are also described.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/29224081','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/29224081"><span>Electrochemical Applications in <span class="hlt">Metal</span> Bioleaching.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Tanne, Christoph Kurt; Schippers, Axel</p> <p>2017-12-10</p> <p>Biohydrometallurgy comprises the recovery of <span class="hlt">metals</span> by biologically catalyzed <span class="hlt">metal</span> dissolution from solids in an aqueous solution. The application of this kind of bioprocessing is described as "biomining," referring to either bioleaching or biooxidation of <span class="hlt">sulfide</span> <span class="hlt">metal</span> ores. Acidophilic iron- and sulfur-oxidizing microorganisms are the key to successful biomining. However, minerals such as primary copper <span class="hlt">sulfides</span> are recalcitrant to dissolution, which is probably due to their semiconductivity or passivation effects, resulting in low reaction rates. Thus, further improvements of the bioleaching process are recommendable. Mineral <span class="hlt">sulfide</span> dissolution is <span class="hlt">based</span> on redox reactions and can be accomplished by electrochemical technologies. The impact of electrochemistry on biohydrometallurgy affects processing as well as analytics. Electroanalysis is still the most widely used electrochemical application in mineralogical research. Electrochemical processing can contribute to bioleaching in two ways. The first approach is the coupling of a mineral <span class="hlt">sulfide</span> to a galvanic partner or electrocatalyst (spontaneous electron transfer). This approach requires only low energy consumption and takes place without technical installations by the addition of higher redox potential minerals (mostly pyrite), carbonic material, or electrocatalytic ions (mostly silver ions). Consequently, the processed mineral (often chalcopyrite) is preferentially dissolved. The second approach is the application of electrolytic bioreactors (controlled electron transfer). The electrochemical regulation of electrolyte properties by such reactors has found most consideration. It implies the regulation of ferrous and ferric ion ratios, which further results in optimized solution redox potential, less passivation effects, and promotion of microbial activity. However, many questions remain open and it is recommended that reactor and electrode designs are improved, with the aim of finding options for simplified</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2018CQGra..35i4001C','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2018CQGra..35i4001C"><span><span class="hlt">BMS</span> symmetry, soft particles and memory</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Chatterjee, Atreya; Lowe, David A.</p> <p>2018-05-01</p> <p>In this work, we revisit unitary irreducible representations of the Bondi–Metzner–Sachs (<span class="hlt">BMS</span>) group discovered by McCarthy. Representations are labelled by an infinite number of supermomenta in addition to 4-momentum. Tensor products of these irreducible representations lead to particle-like states dressed by soft gravitational modes. Conservation of 4-momentum and supermomentum in the scattering of such states leads to a memory effect encoded in the outgoing soft modes. We note there exist irreducible representations corresponding to soft states with strictly vanishing 4-momentum, which may nevertheless be produced by scattering of particle-like states. This fact has interesting implications for the S-matrix in gravitational theories.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/20160009740','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/20160009740"><span>Predictive Modeling of the CDRA 4<span class="hlt">BMS</span></span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Coker, Robert F.; Knox, James C.</p> <p>2016-01-01</p> <p>As part of NASA's Advanced Exploration Systems (AES) program and the Life Support Systems Project (LSSP), fully predictive models of the Four Bed Molecular Sieve (4<span class="hlt">BMS</span>) of the Carbon Dioxide Removal Assembly (CDRA) on the International Space Station (ISS) are being developed. This virtual laboratory will be used to help reduce mass, power, and volume requirements for future missions. In this paper we describe current and planned modeling developments in the area of carbon dioxide removal to support future crewed Mars missions as well as the resolution of anomalies observed in the ISS CDRA.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/29737242','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/29737242"><span><span class="hlt">BMS</span> 493 Modulates Retinoic Acid-Induced Differentiation During Expansion of Human Hematopoietic Progenitor Cells for Islet Regeneration.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Elgamal, Ruth M; Bell, Gillian I; Krause, Sarah C T; Hess, David A</p> <p>2018-06-06</p> <p>Cellular therapies are emerging as a novel treatment strategy for diabetes. Thus, the induction of endogenous islet regeneration in situ represents a feasible goal for diabetes therapy. Umbilical cord blood-derived hematopoietic progenitor cells (HPCs), isolated by high aldehyde dehydrogenase activity (ALDH hi ), have previously been shown to reduce hyperglycemia after intrapancreatic (iPan) transplantation into streptozotocin (STZ)-treated nonobese diabetic (NOD)/severe combined immunodeficiency (SCID) mice. However, these cells are rare and require ex vivo expansion to reach clinically applicable numbers for human therapy. Therefore, we investigated whether <span class="hlt">BMS</span> 493, an inverse retinoic acid receptor agonist, could prevent retinoic acid-induced differentiation and preserve islet regenerative functions during expansion. After 6-day expansion, <span class="hlt">BMS</span> 493-treated cells showed a twofold increase in the number of ALDH hi cells available for transplantation compared with untreated controls. Newly expanded ALDH hi cells showed increased numbers of CD34 and CD133-positive cells, as well as a reduction in CD38 expression, a marker of hematopoietic cell differentiation. <span class="hlt">BMS</span> 493-treated cells showed similar hematopoietic colony-forming capacity compared with untreated cells, with ALDH hi subpopulations producing more colonies than low aldehyde dehydrogenase activity subpopulations for expanded cells. To determine if the secreted proteins of these cells could augment the survival and/or proliferation of β-cells in vitro, conditioned media (CM) from cells expanded with or without <span class="hlt">BMS</span> 493 was added to human islet cultures. The total number of proliferating β-cells was increased after 3- or 7-day culture with CM generated from <span class="hlt">BMS</span> 493-treated cells. In contrast to freshly isolated ALDH hi cells, 6-day expansion with or without <span class="hlt">BMS</span> 493 generated progeny that were unable to reduce hyperglycemia after iPan transplantation into STZ-treated NOD/SCID mice. Further strategies to reduce</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/29779976','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/29779976"><span>The discovery and preclinical evaluation of <span class="hlt">BMS</span>-707035, a potent HIV-1 integrase strand transfer inhibitor.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Naidu, B Narasimhulu; Walker, Michael A; Sorenson, Margaret E; Ueda, Yasutsugu; Matiskella, John D; Connolly, Timothy P; Dicker, Ira B; Lin, Zeyu; Bollini, Sagarika; Terry, Brian J; Higley, Helen; Zheng, Ming; Parker, Dawn D; Wu, Dedong; Adams, Stephen; Krystal, Mark R; Meanwell, Nicholas A</p> <p>2018-07-01</p> <p><span class="hlt">BMS</span>-707035 is an HIV-1 integrase strand transfer inhibitor (INSTI) discovered by systematic optimization of N-methylpyrimidinone carboxamides guided by structure-activity relationships (SARs) and the single crystal X-ray structure of compound 10. It was rationalized that the unexpectedly advantageous profiles of N-methylpyrimidinone carboxamides with a saturated C2-substitutent may be due, in part, to the geometric relationship between the C2-substituent and the pyrimidinone core. The single crystal X-ray structure of 10 provided support for this reasoning and guided the design of a spirocyclic series 12 which led to discovery of the morpholino-fused pyrimidinone series 13. Several carboxamides derived from this bicyclic scaffold displayed improved antiviral activity and pharmacokinetic profiles when compared with corresponding spirocyclic analogs. <span class="hlt">Based</span> on the excellent antiviral activity, preclinical profiles and acceptable in vitro and in vivo toxicity profiles, 13a (<span class="hlt">BMS</span>-707035) was selected for advancement into phase I clinical trials. Copyright © 2018 Elsevier Ltd. All rights reserved.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2017GeCoA.216..141H','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2017GeCoA.216..141H"><span>The behavior of Pt, Pd, Cu and Ni in the Se-<span class="hlt">sulfide</span> system between 1050 and 700 °C and the role of Se in platinum-group elements fractionation in <span class="hlt">sulfide</span> melts</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Helmy, Hassan M.; Fonseca, Raúl O. C.</p> <p>2017-11-01</p> <p>The behavior of Pt, Pd, Ni and Cu in Se-<span class="hlt">sulfide</span> system and the role of Se in platinum-group elements (PGE) fractionation have been experimentally investigated at temperatures between 1050 and 700 °C in evacuated silica tubes. At 1050 °C, Se partially partitions into a vapor phase. At 980 °C, monosulfide solid solution (mss) and <span class="hlt">sulfide</span> melt are the only stable phases. No Pt or Pd-bearing discrete selenide phases form down to 700 °C. Instead cooperite (PtS) forms at 900 °C. Both mss and <span class="hlt">sulfide</span> melt can accommodate wt.% levels of Se over the whole temperature range covered by the experiments. The addition of Se in the <span class="hlt">sulfide</span> system leads to an increase in the activity coefficients of Ni and Pd in <span class="hlt">sulfide</span> melt. This is reflected by an increase in the partition coefficients of Ni and Pd between mss and <span class="hlt">sulfide</span> melt. The Pt-Se activity coefficient in <span class="hlt">sulfide</span> melt is lower than that of Pt-S. Owing to selenium's high solubility in <span class="hlt">sulfides</span>, there never become oversaturated in Se to the extent that discrete selenides form. As such, <span class="hlt">base</span> <span class="hlt">metal</span> <span class="hlt">sulfides</span> are expected to control the geochemical behavior of Se in natural systems. Interestingly, partition coefficients for the platinum-group elements (Os, Ir, Ru, Pt, Rh, Pd) between mss and <span class="hlt">sulfide</span> melt are undistinguishable regardless of whether Se is present or not. These results imply that Se plays little role in the fractionation of PGE as <span class="hlt">sulfide</span> melt cools down and crystallize. Furthermore, our experimental results provide evidence that Se is volatile at magmatic temperature and is likely to be degassed like sulfur.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2001AGUFM.B32B0119H','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2001AGUFM.B32B0119H"><span><span class="hlt">Metal</span> Transport, Heavy <span class="hlt">Metal</span> Speciation and Microbial Fixation Through Fluvial Subenvironments, Lower Coeur D'Alene River Valley, Idaho</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Hooper, R. L.; Mahoney, J. B.</p> <p>2001-12-01</p> <p> and authigenic carbonate and <span class="hlt">sulfide</span> phases. Marshes subjected to periodic subaerial exposure/flooding are even more complex and dominated by authigenic and biogenic mineralization. Lacustrine environments are dominated by nanocrystalline inorganic and biogenic <span class="hlt">sulfide</span> minerals in the upper third of the contaminated sediment column with increasing amounts of silt sized detrital <span class="hlt">sulfides</span> (especially sphalerite) closer to the premining surface. In pH-neutral subenvironments within the wetlands and lateral lakes of the lower Coeur d'Alene River Valley, microbial fixation plays a critical role in sequestering <span class="hlt">metals</span>. Complex <span class="hlt">metal</span> oxyhydroxide phases provided via flood recharge to river edge, marsh and lacustrine environments rapidly dissolve upon encountering anoxic conditions. Microbial activity is extremely effective in removing heavy <span class="hlt">metals</span> from the water column, producing a nanocrystalline biofilm substrate characterized by ZnS (sphalerite) and non-stoichiometric PbS, FeS, and mixed <span class="hlt">metal</span> <span class="hlt">sulfides</span>. These solid phases are inherently unstable, and the sequestered <span class="hlt">metals</span> become readily available through changes in redox or pH conditions, particularly dam-controlled annual fluctuations in <span class="hlt">base</span> level, or during removal by bottom-feeding aquatic water fowl. The recognition of the inherent complexity and instability of microbially produced <span class="hlt">sulfidic</span> material in a pH-neutral environment has important implications for remediation efforts utilizing wetland filtration methods.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/28915013','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/28915013"><span>A Polyoxovanadate-Resorcin[4]arene-<span class="hlt">Based</span> Porous <span class="hlt">Metal</span>-Organic Framework as an Efficient Multifunctional Catalyst for the Cycloaddition of CO2 with Epoxides and the Selective Oxidation of <span class="hlt">Sulfides</span>.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Lu, Bing-Bing; Yang, Jin; Liu, Ying-Ying; Ma, Jian-Fang</p> <p>2017-10-02</p> <p>In this work, we report a new polyoxovanadate-resorcin[4]arene-<span class="hlt">based</span> <span class="hlt">metal</span>-organic framework (PMOF), [Co 2 L 0.5 V 4 O 12 ]·3DMF·5H 2 O (1), assembled with a newly functionalized wheel-like resorcin[4]arene ligand (L). 1 features an elegant porous motif and represents a rare example of PMOFs composed of both a resorcin[4]arene ligand and polyoxovanadate. Remarkably, 1 shows open V sites in the channel, which makes 1 an efficient heterogeneous Lewis acid catalyst for the cycloaddition of carbon dioxide to epoxides with high conversion and selectivity. Strikingly, 1 also exhibits high catalytic activity for the heterogeneous oxidative desulfurization of <span class="hlt">sulfides</span>. Particularly, the heterogeneous catalyst 1 can be easily separated and reused with good catalytic activity.</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_10");'>10</a></li> <li><a href="#" onclick='return showDiv("page_11");'>11</a></li> <li class="active"><span>12</span></li> <li><a href="#" onclick='return showDiv("page_13");'>13</a></li> <li><a href="#" onclick='return showDiv("page_14");'>14</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_12 --> <div id="page_13" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_11");'>11</a></li> <li><a href="#" onclick='return showDiv("page_12");'>12</a></li> <li class="active"><span>13</span></li> <li><a href="#" onclick='return showDiv("page_14");'>14</a></li> <li><a href="#" onclick='return showDiv("page_15");'>15</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="241"> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/servlets/purl/864948','DOE-PATENT-XML'); return false;" href="https://www.osti.gov/servlets/purl/864948"><span>Method of removing hydrogen <span class="hlt">sulfide</span> from gases utilizing a zinc oxide sorbent and regenerating the sorbent</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Jalan, Vinod M.; Frost, David G.</p> <p>1984-01-01</p> <p>A spent solid sorbent resulting from the removal of hydrogen <span class="hlt">sulfide</span> from a fuel gas flow is regenerated with a steam-air mixture. The mixture of steam and air may also include additional nitrogen or carbon dioxide. The gas mixture contacts the spent sorbent containing <span class="hlt">metal</span> <span class="hlt">sulfide</span> at a temperature above 500.degree. C. to regenerate the <span class="hlt">sulfide</span> to <span class="hlt">metal</span> oxide or carbonate. Various <span class="hlt">metal</span> species including the period four transition <span class="hlt">metals</span> and the lanthanides are suitable sorbents that may be regenerated by this method. In addition, the introduction of carbon dioxide gas permits carbonates such as those of strontium, barium and calcium to be regenerated. The steam permits regeneration of spent sorbent without formation of <span class="hlt">metal</span> sulfate. Moreover, the regeneration will proceed with low oxygen concentrations and will occur without the increase in temperature to minimize the risk of sintering and densification of the sorbent.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/20070009858','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/20070009858"><span>Diverse <span class="hlt">Metals</span> and <span class="hlt">Sulfides</span> in Polymict Ureilites EET 83309 and EET 87720</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Herrin, J. S.; Mittlefehldt, D. W.; Downes, H.; Humayun, M.</p> <p>2007-01-01</p> <p>Ureilites are a group of carbon-bearing ultramafic achondrites. The majority of samples are monomict with major and trace element compositions consistent with a restitic origin after extensive loss of basaltic melts and significant loss of their <span class="hlt">metallic</span> component during anatexis. Monomict ureilites are thought to represent largely intact samples of the ureilite parent body (UPB) mantle. Polymict ureilites, by contrast, are fragmental breccias consisting of welded lithic clasts and isolated mineral fragments thought to be regolith that assembled after major disruption fragmented large portions of the UPB mantle. In most polymict ureilites, the majority of clasts consist of material similar to monomict ureilites gardened from the UPB mantle but other materials, both endogenic and xenogenic to the UPB are also found in polymict ureilites, including clasts texturally and compositionally similar to known chondrite types as well as feldspathic melt rocks and clasts of Ca-Al-Ti-rich assemblages. In this study, we demonstrate that polymict ureilites also contain a variety of <span class="hlt">metal</span> and <span class="hlt">sulfide</span> compositions of diverse origins. They offer insight into the final equilibrium conditions of disrupted portions of the UPB mantle and the diversity of materials locally available for regolith formation, and provide evidence for only limited post-regolith formation thermal metamorphism.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://ntrs.nasa.gov/search.jsp?R=20030111603&hterms=Loan&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D20%26Ntt%3DLoan','NASA-TRS'); return false;" href="https://ntrs.nasa.gov/search.jsp?R=20030111603&hterms=Loan&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D20%26Ntt%3DLoan"><span>Iron-Nickel <span class="hlt">Sulfide</span> Compositional Ranges in CM Chondrites: No Simple Plan</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Zolensky, Michael; Le, Loan</p> <p>2003-01-01</p> <p>Iron-nickel <span class="hlt">sulfides</span> are found in most or all solar system environments, and are probably the only minerals found in all extraterrestrial materials on hand. Despite this ubiquity, they have only just begun the attention they deserve. The most common Fe-Ni <span class="hlt">sulfides</span> in chondrites are troilite (FeS), pyrrhotite (Fe(1-x)S) and pentlandite (Fe,Ni)9S8. Troilite is believed to have resulted from <span class="hlt">sulfidation</span> of <span class="hlt">metal</span> (Fe-Ni) grains in an H2S-containing environment. Pyrrhotite is produced when friable troilite grains, which are exfoliated from the <span class="hlt">metal</span> nucleus, are submitted to continued <span class="hlt">sulfidation</span>. Some asteroids are known to have experienced aqueous alteration, forming products including new generations of <span class="hlt">sulfides</span> (pyrrhotite and pentlandite). Pentlandite in particular is known to form during such alteration. However, experimental work by Lauretta has indicated that pentlandite may also have been formed during the initial <span class="hlt">sulfidation</span> process, due to the faster diffusion rate of nickel into the forming <span class="hlt">sulfide</span>, as compared to iron. Finally, there is considerable evidence for a family of phases intermediate between pyrrhotite and pentlandite, following the trend of the high temperature monosulfide solid solution, something not encountered in terrestrial rocks. Each <span class="hlt">sulfide</span> has its own particular stability conditions, which have been determined for most phases. The long-term objective of our research is to characterize <span class="hlt">sulfides</span> in chondritic materials in order to better establish the conditions under which they formed, and the subsequent processes they experienced. Ultimately, it will be possible to infer whether the <span class="hlt">sulfides</span> in the chondrites were formed in the solar nebula or on asteroids, and if formed on the asteroids, deduce how much alteration has occurred there. Here we explore the relationships between the finest grain size portions of carbonaceous chondrites, these being matrix and chondrule rims; fine-grained materials are the most sensitive to their environment</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/biblio/6374735','DOE-PATENT-XML'); return false;" href="https://www.osti.gov/biblio/6374735"><span>Improved cell design for lithium alloy/<span class="hlt">metal</span> <span class="hlt">sulfide</span> battery</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Kaun, T.D.</p> <p>1984-03-30</p> <p>The disclosed lithium alloy/iron <span class="hlt">sulfide</span> cell design provides loop-like positive and negative sheet <span class="hlt">metal</span> current collectors electrically insulated from one another by separator means, the positive collector being located outwardly of the negative collector. The collectors are initially secured within an open-ended cell housing, which allows for collector pretesting for electrical shorts prior to adding any electrode materials and/or electrolyte to the cell. Separate chambers are defined outwardly of the positive collector and inwardly of the negative collector open respectively in opposite directions toward the open ends of the cell housing; and positive and negative electrode materials can be extruded into these respective chambers via the opposite open housing ends. The chambers and cell housing ends can then be sealed closed. A cross wall structurally reinforces the cell housing and also thereby defines two cavities, and paired positive and negative collectors are disposed in each cavity and electrically connected in parallel. The cell design provides for a high specific energy output and improved operating life in that any charge-discharge cycle swelling of the positive electrode material will be inwardly against only the positive collector to minimize shorts caused by the collectors shifting relative to one another.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2017GeCoA.203...37V','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2017GeCoA.203...37V"><span>Mesoarchean melting and Neoarchean to Paleoproterozoic metasomatism during the formation of the cratonic mantle keel beneath West Greenland</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>van Acken, D.; Luguet, A.; Pearson, D. G.; Nowell, G. M.; Fonseca, R. O. C.; Nagel, T. J.; Schulz, T.</p> <p>2017-04-01</p> <p>Highly siderophile element (HSE) concentration and 187Os/188Os isotopic heterogeneity has been observed on various scales in the Earth's mantle. Interaction of residual mantle peridotite with infiltrating melts has been suggested to overprint primary bulk rock HSE signatures originating from partial melting, contributing to the heterogeneity seen in the global peridotite database. Here we present a detailed study of harzburgitic xenolith 474527 from the Kangerlussuaq suite, West Greenland, coupling the Re-Os isotope geochemistry with petrography of both <span class="hlt">base</span> <span class="hlt">metal</span> <span class="hlt">sulfides</span> (<span class="hlt">BMS</span>) and silicates to assess the impact of overprint induced by melt-rock reaction on the Re-Os isotope system. Garnet harzburgite sample 474527 shows considerable heterogeneity in the composition of its major phases, most notably olivine and Cr-rich garnet, suggesting formation through multiple stages of partial melting and subsequent metasomatic events. The major <span class="hlt">BMS</span> phases show a fairly homogeneous pentlandite-rich composition typical for <span class="hlt">BMS</span> formed via metasomatic reaction, whereas the 187Os/188Os compositions determined for 17 of these <span class="hlt">BMS</span> are extremely heterogeneous ranging between 0.1037 and 0.1981. Analyses by LA-ICP-MS reveal at least two populations of <span class="hlt">BMS</span> grains characterized by contrasting HSE patterns. One type of pattern is strongly enriched in the more compatible HSE Os, Ir, and Ru over the typically incompatible Pt, Pd, and Re, while the other type shows moderate enrichment of the more incompatible HSE and has overall lower compatible HSE/incompatible HSE composition. The small-scale heterogeneity observed in these <span class="hlt">BMS</span> highlights the need for caution when utilizing the Re-Os system to date mantle events, as even depleted harzburgite samples such as 474527 are likely to have experienced a complex history of metasomatic overprinting, with uncertain effects on the HSE.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/biblio/335446','DOE-PATENT-XML'); return false;" href="https://www.osti.gov/biblio/335446"><span>Process for removing technetium from iron and other <span class="hlt">metals</span></span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Leitnaker, J.M.; Trowbridge, L.D.</p> <p>1999-03-23</p> <p>A process for removing technetium from iron and other <span class="hlt">metals</span> comprises the steps of converting the molten, alloyed technetium to a <span class="hlt">sulfide</span> dissolved in manganese <span class="hlt">sulfide</span>, and removing the <span class="hlt">sulfide</span> from the molten <span class="hlt">metal</span> as a slag. 4 figs.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://pubs.er.usgs.gov/publication/70017193','USGSPUBS'); return false;" href="https://pubs.er.usgs.gov/publication/70017193"><span>Persistency-field Eh-pH diagrams for <span class="hlt">sulfides</span> and their application to supergene oxidation and enrichment of <span class="hlt">sulfide</span> ore bodies</span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Sato, M.</p> <p>1992-01-01</p> <p>At temperatures prevailing near the Earth's surface, metastable co-existence of chemical substances is common because chemical reactions that would directly lead to the attainment of thermody-namically most stable equilibria are often blocked by high activation energy barriers. The persistency of a metastable assemblage is then governed by alternative reaction paths that provide lower activation energy barriers. Comparison of observed mineral assemblages in the supergene oxidized and enriched <span class="hlt">sulfide</span> ores with corresponding stability Eh-pH diagrams reveals that the supergene assemblages are mostly metastable due primarily to the persistency of <span class="hlt">sulfide</span> minerals beyond stability boundaries. A new set of diagrams called persistency-field Eh-pH diagrams has been constructed for binary <span class="hlt">metal</span> <span class="hlt">sulfides</span> on the basis of electrochemical and other experimental data. Each diagram delineates the persistency field, which is a combined field of thermodynamic stability and reaction path-controlled metastability, for a specific <span class="hlt">sulfide</span> mineral. When applied to the supergene assemblages, these new diagrams show much better correspondence to the field observations. Although there may still be room for further refinement, the new diagrams appear to provide a strong visual aid to the understanding of the behavior of <span class="hlt">sulfide</span> minerals in the supergene conditions. ?? 1992.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://pubs.er.usgs.gov/publication/70026697','USGSPUBS'); return false;" href="https://pubs.er.usgs.gov/publication/70026697"><span>Massive <span class="hlt">sulfide</span> deposition and trace element remobilization in the Middle Valley sediment-hosted hydrothermal system, northern Juan de Fuca Rdge</span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Houghton, J.L.; Shanks, Wayne C.; Seyfried, W.E.</p> <p>2004-01-01</p> <p>The Bent Hill massive <span class="hlt">sulfide</span> deposit and ODP Mound deposit in Middle Valley at the northernmost end of the Juan de Fuca Ridge are two of the largest modern seafloor hydrothermal deposits yet explored. Trace <span class="hlt">metal</span> concentrations of <span class="hlt">sulfide</span> minerals, determined by laser-ablation ICP-MS, were used in conjunction with mineral paragenetic studies and thermodynamic calculations to deduce the history of fluid-mineral reactions during <span class="hlt">sulfide</span> deposition. Detailed analyses of the distribution of <span class="hlt">metals</span> in <span class="hlt">sulfides</span> indicate significant shifts in the physical and chemical conditions responsible for the trace element variability observed in these <span class="hlt">sulfide</span> deposits. Trace elements (Mn, Co, Ni, As, Se, Ag, Cd, Sb, Pb, and Bi) analyzed in a representative suite of 10 thin sections from these deposits suggest differences in conditions and processes of hydrothermal alteration resulting in mass transfer of <span class="hlt">metals</span> from the center of the deposits to the margins. Enrichments of some trace <span class="hlt">metals</span> (Pb, Sb, Cd, Ag) in sphalerite at the margins of the deposits are best explained by dissolution/reprecipitation processes consistent with secondary remineralization. Results of reaction-path models clarify mechanisms of mass transfer during remineralization of <span class="hlt">sulfide</span> deposits due to mixing of hydrothermal fluids with seawater. Model results are consistent with patterns of observed mineral paragenesis and help to identify conditions (pH, redox, temperature) that may be responsible for variations in trace <span class="hlt">metal</span> concentrations in primary and secondary minerals. Differences in trace <span class="hlt">metal</span> distributions throughout a single deposit and between nearby deposits at Middle Valley can be linked to the history of <span class="hlt">metal</span> mobilization within this active hydrothermal system that may have broad implications for <span class="hlt">sulfide</span> ore formation in other sedimented and unsedimented ridge systems. ?? 2004 Elsevier Ltd.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/23946878','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/23946878"><span>Use of drug-eluting stents versus bare-<span class="hlt">metal</span> stents in Korea: a cost-minimization analysis using population data.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Suh, Hae Sun; Song, Hyun Jin; Jang, Eun Jin; Kim, Jung-Sun; Choi, Donghoon; Lee, Sang Moo</p> <p>2013-07-01</p> <p>The goal of this study was to perform an economic analysis of a primary stenting with drug-eluting stents (DES) compared with bare-<span class="hlt">metal</span> stents (<span class="hlt">BMS</span>) in patients with acute myocardial infarction (AMI) admitted through an emergency room (ER) visit in Korea using population-<span class="hlt">based</span> data. We employed a cost-minimization method using a decision analytic model with a two-year time period. Model probabilities and costs were obtained from a published systematic review and population-<span class="hlt">based</span> data from which a retrospective database analysis of the national reimbursement database of Health Insurance Review and Assessment covering 2006 through 2010 was performed. Uncertainty was evaluated using one-way sensitivity analyses and probabilistic sensitivity analyses. Among 513 979 cases with AMI during 2007 and 2008, 24 742 cases underwent stenting procedures and 20 320 patients admitted through an ER visit with primary stenting were identified in the <span class="hlt">base</span> model. The transition probabilities of DES-to-DES, DES-to-<span class="hlt">BMS</span>, DES-to-coronary artery bypass graft, and DES-to-balloon were 59.7%, 0.6%, 4.3%, and 35.3%, respectively, among these patients. The average two-year costs of DES and <span class="hlt">BMS</span> in 2011 Korean won were 11 065 528 won/person and 9 647 647 won/person, respectively. DES resulted in higher costs than <span class="hlt">BMS</span> by 1 417 882 won/person. The model was highly sensitive to the probability and costs of having no revascularization. Primary stenting with <span class="hlt">BMS</span> for AMI with an ER visit was shown to be a cost-saving procedure compared with DES in Korea. Caution is needed when applying this finding to patients with a higher level of severity in health status.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/28850715','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/28850715"><span>Clinical significance of CYP2C19 polymorphisms on the metabolism and pharmacokinetics of 11β-hydroxysteroid dehydrogenase type-1 inhibitor <span class="hlt">BMS</span>-823778.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Cheng, Yaofeng; Wang, Lifei; Iacono, Lisa; Zhang, Donglu; Chen, Weiqi; Gong, Jiachang; Humphreys, William Griffith; Gan, Jinping</p> <p>2018-01-01</p> <p><span class="hlt">BMS</span>-823778 is an inhibitor of 11β-hydroxysteroid dehydrogenase type-1, and thus a potential candidate for Type 2 diabetes treatment. Here, we investigated the metabolism and pharmacokinetics of <span class="hlt">BMS</span>-823778 to understand its pharmacokinetic variations in early clinical trials. The metabolism of <span class="hlt">BMS</span>-823778 was characterized in multiple in vitro assays. Pharmacokinetics were evaluated in healthy volunteers, prescreened as CYP2C19 extensive metabolizers (EM) or poor metabolizers (PM), with a single oral dose of [ 14 C]<span class="hlt">BMS</span>-823778 (10 mg, 80 μCi). Three metabolites (<5%) were identified in human hepatocytes and liver microsomes (HLM) incubations, including two hydroxylated metabolites (M1 and M2) and one glucuronide conjugate (M3). As the most abundant metabolite, M1 was formed mainly through CYP2C19. M1 formation was also correlated with CYP2C19 activities in genotyped HLM. In humans, urinary excretion of dosed radioactivity was significantly higher in EM (68.8%; 95% confidence interval 61.3%, 76.3%) than in PM (47.0%; 43.5%, 50.6%); only small portions (<2%) were present in faeces or bile from both genotypes. In plasma, <span class="hlt">BMS</span>-823778 exposure in PM was significantly (5.3-fold, P = 0.0097) higher than in EM. Furthermore, total radioactivity exposure was significantly higher (P < 0.01) than <span class="hlt">BMS</span>-823778 exposure in all groups, indicating the presence of metabolites. M1 was the only metabolite observed in plasma, and much lower in PM. In urine, the amount of M1 and its oxidative metabolite in EM was 7-fold of that in PM, while more glucuronide conjugates of <span class="hlt">BMS</span>-823778 and M1 were excreted in PM. CYP2C19 polymorphisms significantly impacted systemic exposure and metabolism pathways of <span class="hlt">BMS</span>-823778 in humans. © 2017 The British Pharmacological Society.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/19603670','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/19603670"><span>Do acid volatile <span class="hlt">sulfides</span> (AVS) influence the accumulation of sediment-bound <span class="hlt">metals</span> to benthic invertebrates under natural field conditions?</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>De Jonge, Maarten; Dreesen, Freja; De Paepe, Josefina; Blust, Ronny; Bervoets, Lieven</p> <p>2009-06-15</p> <p>The present study evaluates the influence of acid volatile <span class="hlt">sulfides</span> (AVS) on accumulation of sediment-bound <span class="hlt">metals</span> in benthic invertebrates under natural field conditions. Natural sediments, pore water, surface water, and two species of widespread benthic invertebrates (Chironomus gr. thummi and Tubifex tubifex) were collected from 17 historical polluted Flemish lowland rivers and measured for <span class="hlt">metal</span> concentrations. Different sediment characteristics were determined (AVS, organic matter, clay content) and multiple regression was used to study their relationship with accumulated <span class="hlt">metals</span> in the invertebrates. Physical and chemical analysis of the field samples indicated low <span class="hlt">metal</span> concentrations in the water and pore water, but very high <span class="hlt">metal</span> concentrations in the sediment and the invertebrates, especially for Pb (5.99 micromol/ g). In general, <span class="hlt">metal</span> accumulation in chironomids and tubificid worms was most strongly correlated with total <span class="hlt">metal</span> concentrations in the sediment and sediment <span class="hlt">metal</span> concentrations normalized for organic matter and clay content. Following the results of the linear regression model, AVS did not turn out to be a significant variable in describing variation in <span class="hlt">metal</span> accumulation. Our study clearly demonstrates that, in addition to the results gained from experiments under lab conditions, benthic invertebrates can accumulate <span class="hlt">metals</span> from unspiked field sediments even when there's an excess of AVS.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/servlets/purl/873136','DOE-PATENT-XML'); return false;" href="https://www.osti.gov/servlets/purl/873136"><span>Catalysts for the selective oxidation of hydrogen <span class="hlt">sulfide</span> to sulfur</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Srinivas, Girish; Bai, Chuansheng</p> <p>2000-08-08</p> <p>This invention provides catalysts for the oxidation of hydrogen <span class="hlt">sulfide</span>. In particular, the invention provides catalysts for the partial oxidation of hydrogen <span class="hlt">sulfide</span> to elemental sulfur and water. The catalytically active component of the catalyst comprises a mixture of <span class="hlt">metal</span> oxides containing titanium oxide and one or more <span class="hlt">metal</span> oxides which can be selected from the group of <span class="hlt">metal</span> oxides or mixtures of <span class="hlt">metal</span> oxides of transition <span class="hlt">metals</span> or lanthanide <span class="hlt">metals</span>. Preferred <span class="hlt">metal</span> oxides for combination with TiO.sub.2 in the catalysts of this invention include oxides of V, Cr, Mn, Fe, Co, Ni, Cu, Nb, Mo, Tc, Ru, Rh, Hf, Ta, W, Au, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu. Catalysts which comprise a homogeneous mixture of titanium oxide and niobium (Nb) oxide are also provided. A preferred method for preparing the precursor homogenous mixture of <span class="hlt">metal</span> hydroxides is by coprecipitation of titanium hydroxide with one or more other selected <span class="hlt">metal</span> hydroxides. Catalysts of this invention have improved activity and/or selectivity for elemental sulfur production. Further improvements of activity and/or selectivity can be obtained by introducing relatively low amounts (up to about 5 mol %)of a promoter <span class="hlt">metal</span> oxide (preferably of <span class="hlt">metals</span> other than titanium and that of the selected second <span class="hlt">metal</span> oxide) into the homogeneous <span class="hlt">metal</span>/titanium oxide catalysts of this invention.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/12083717','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/12083717"><span>The removal of heavy <span class="hlt">metals</span> from contaminated soil by a combination of sulfidisation and flotation.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Vanthuyne, Mathias; Maes, André</p> <p>2002-05-06</p> <p>The possibility of removing cadmium, copper, lead and zinc from Belgian loamy soil by a combination of sulfidisation pre-treatment and Denver flotation was investigated. The potentially available--<span class="hlt">sulfide</span> convertible--<span class="hlt">metal</span> content of the <span class="hlt">metal</span> polluted soil was estimated by EDTA (0.1 M, pH 4.65) extraction and BCR sequential extraction. EDTA extraction is better at approximating the <span class="hlt">metal</span> percentage that is expected to be convertible into a <span class="hlt">metal</span> <span class="hlt">sulfide</span> phase, in contrast to the sequential extraction procedure of 'Int. J. Environ. Anal. Chem. 51 (1993) pp. 135-151' in which transition <span class="hlt">metals</span> present as iron oxide co-precipitates are dissolved by hydroxylammoniumchloride in the second extraction step. To compare the surface characteristics of <span class="hlt">metal</span> <span class="hlt">sulfides</span> formed by sulfidisation with those of crystalline <span class="hlt">metal</span> <span class="hlt">sulfides</span>, two types of synthetic sediments were prepared and extracted with 0.1 M EDTA (pH 4.65) in anoxic conditions. Separate <span class="hlt">metal</span> <span class="hlt">sulfides</span> or co-precipitates with iron <span class="hlt">sulfide</span> were formed by <span class="hlt">sulfide</span> conditioning. The Denver flotation of both types of synthetic sediments (kerosene as collector at high background electrolyte concentrations) resulted in similar concentrating factors for freshly formed <span class="hlt">metal</span> <span class="hlt">sulfides</span> as for fine-grained crystalline <span class="hlt">metal</span> <span class="hlt">sulfides</span>. The selective flotation of <span class="hlt">metal</span> <span class="hlt">sulfides</span> after <span class="hlt">sulfide</span> conditioning of a polluted soil, using kerosene or potassium ethyl xanthate as collectors and MIBC as frother, was studied at high background electrolyte concentrations. The sulfidisations were made in ambient air and inside an anoxic glove box. The concentrating factors corrected by the potentially available <span class="hlt">metal</span> percentage, determined by 0.1 M EDTA extraction, lie between 2 and 3. The selective flotation of these finely dispersed, amorphous, <span class="hlt">metal</span> <span class="hlt">sulfides</span> can possibly be improved by optimising the bubble-particle interaction.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2013GeCoA.119..117M','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2013GeCoA.119..117M"><span>Sulfur and <span class="hlt">sulfides</span> in chondrules</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Marrocchi, Yves; Libourel, Guy</p> <p>2013-10-01</p> <p>The nature and distribution of <span class="hlt">sulfides</span> within type I PO, POP and PP chondrules of the carbonaceous chondrite Vigarano (CV3) have been studied by secondary electron microscopy and electron microprobe. They occur predominantly as spheroidal blebs composed entirely of low-Ni iron <span class="hlt">sulfide</span> (troilite, FeS) or troilite + magnetite but in less abundance in association with <span class="hlt">metallic</span> Fe-Ni beads in opaque assemblages. Troilites are mainly located within the low-Ca pyroxene outer zone and their amounts increase with the abundance of low-Ca pyroxene within chondrules, suggesting co-crystallization of troilite and low-Ca pyroxene during high-temperature events. We show that sulfur concentration and <span class="hlt">sulfide</span> occurrence in chondrules obey high temperature sulfur solubility and saturation laws. Depending on the fS2 and fO2 of the surrounding gas and on the melt composition, mainly the FeO content, sulfur dissolved in chondrule melts may eventually reach a concentration limit, the sulfur content at <span class="hlt">sulfide</span> saturation (SCSS), at which an immiscible iron <span class="hlt">sulfide</span> liquid separates from the silicate melt. The occurrence of both a silicate melt and an immiscible iron <span class="hlt">sulfide</span> liquid is further supported by the non-wetting behavior of <span class="hlt">sulfides</span> on silicate phases in chondrules due to the high interfacial tension between their precursor iron-<span class="hlt">sulfide</span> liquid droplets and the surrounding silicate melt during the high temperature chondrule-forming event. The evolution of chondrule melts from PO to PP towards more silicic compositions, very likely due to high PSiO(g) of the surrounding nebular gas, induces saturation of FeS at much lower S content in PP than in PO chondrules, leading to the co-crystallization of iron <span class="hlt">sulfides</span> and low-Ca pyroxenes. Conditions of co-saturation of low-Ca pyroxene and FeS are only achieved in non canonical environments characterized by high partial pressures of sulfur and SiO and redox conditions more oxidizing than IW-3. Fe and S mass balance calculations also</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2017GeCoA.216..169H','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2017GeCoA.216..169H"><span>Platinum-group elements fractionation by selective complexing, the Os, Ir, Ru, Rh-arsenide-<span class="hlt">sulfide</span> systems above 1020 °C</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Helmy, Hassan M.; Bragagni, Alessandro</p> <p>2017-11-01</p> <p>The platinum-group element (PGE) contents in magmatic ores and rocks are normally in the low μg/g (even in the ng/g) level, yet they form discrete platinum-group mineral (PGM) phases. IPGE (Os, Ir, Ru) + Rh form alloys, <span class="hlt">sulfides</span>, and sulfarsenides while Pt and Pd form arsenides, tellurides, bismuthoids and antimonides. We experimentally investigate the behavior of Os, Ru, Ir and Rh in As-bearing <span class="hlt">sulfide</span> system between 1300 and 1020 °C and show that the prominent mineralogical difference between IPGE (+Rh) and Pt and Pd reflects different chemical preference in the <span class="hlt">sulfide</span> melt. At temperatures above 1200 °C, Os shows a tendency to form alloys. Ruthenium forms a <span class="hlt">sulfide</span> (laurite RuS2) while Ir and Rh form sulfarsenides (irarsite IrAsS and hollingworthite RhAsS, respectively). The chemical preference of PGE is selective: IPGE + Rh form <span class="hlt">metal-metal</span>, <span class="hlt">metal-S</span> and <span class="hlt">metal</span>-AsS complexes while Pt and Pd form semimetal complexes. Selective complexing followed by mechanical separation of IPGE (and Rh)-ligand from Pt- and Pd-ligand associations lead to PGE fractionation.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/24794631','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/24794631"><span>Biomining-biotechnologies for extracting and recovering <span class="hlt">metals</span> from ores and waste materials.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Johnson, D Barrie</p> <p>2014-12-01</p> <p>The abilities of acidophilic chemolithotrophic bacteria and archaea to accelerate the oxidative dissolution of <span class="hlt">sulfide</span> minerals have been harnessed in the development and application of a biotechnology for extracting <span class="hlt">metals</span> from <span class="hlt">sulfidic</span> ores and concentrates. Biomining is currently used primarily to leach copper <span class="hlt">sulfides</span> and as an oxidative pretreatment for refractory gold ores, though it is also used to recover other <span class="hlt">base</span> <span class="hlt">metals</span>, such as cobalt, nickel and zinc. Recent developments have included using acidophiles to process electronic wastes, to extract <span class="hlt">metals</span> from oxidized ores, and to selectively recover <span class="hlt">metals</span> from process waters and waste streams. This review describes the microorganisms and mechanisms involved in commercial biomining operations, how the technology has developed over the past 50 years, and discusses the challenges and opportunities for mineral biotechnologies in the 21st century. Copyright © 2014 Elsevier Ltd. All rights reserved.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4792572','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4792572"><span>Single agent <span class="hlt">BMS</span>-911543 Jak2 inhibitor has distinct inhibitory effects on STAT5 signaling in genetically engineered mice with pancreatic cancer</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Mace, Thomas A.; Shakya, Reena; Elnaggar, Omar; Wilson, Kristin; Komar, Hannah M.; Yang, Jennifer; Pitarresi, Jason R.; Young, Gregory S.; Ostrowski, Michael C.; Ludwig, Thomas; Bekaii-Saab, Tanios; Bloomston, Mark; Lesinski, Gregory B.</p> <p>2015-01-01</p> <p>The Jak/STAT pathway is activated in human pancreatic ductal adenocarcinoma (PDAC) and cooperates with mutant Kras to drive initiation and progression of PDAC in murine models. We hypothesized that the small-molecule Jak2 inhibitor (<span class="hlt">BMS</span>-911543) would elicit anti-tumor activity against PDAC and decrease immune suppressive features of the disease. We used an aggressive genetically engineered PDAC model with mutant KrasG12D, tp53R270H, and Brca1 alleles (KPC-Brca1 mice). Mice with confirmed tumor burden were treated orally with vehicle or 30 mg/kg <span class="hlt">BMS</span>-911543 daily for 14 days. Histologic analysis of pancreata from treated mice revealed fewer foci of adenocarcinoma and significantly decreased Ki67+ cells versus controls. In vivo administration of <span class="hlt">BMS</span>-911543 significantly reduced pSTAT5 and FoxP3 positive cells within the pancreas, but did not alter STAT3 phosphorylation. Continuous dosing of KPC-Brca1 mice with <span class="hlt">BMS</span>-911543 resulted in a median survival of 108 days, as compared to a median survival of 87 days in vehicle treated animals, a 23% increase (p = 0.055). In vitro experiments demonstrated that PDAC cell lines were poorly sensitive to <span class="hlt">BMS</span>-911543, requiring high micromolar concentrations to achieve targeted inhibition of Jak/STAT signaling. Similarly, <span class="hlt">BMS</span>-911543 had little in vitro effect on the viability of both murine and human PDAC-derived stellate cell lines. However, <span class="hlt">BMS</span>-911543 potently inhibited phosphorylation of pSTAT3 and pSTAT5 at low micromolar doses in human PBMC and reduced in vitro differentiation of Foxp3+ T regulatory cells. These results indicate that single agent Jak2i deserves further study in preclinical models of PDAC and has distinct inhibitory effects on STAT5 mediated signaling. PMID:26575024</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2013AGUFM.V51C2688M','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2013AGUFM.V51C2688M"><span>Co-settling of Chromite and <span class="hlt">Sulfide</span> Melt Droplets and Trace Element Partitioning between <span class="hlt">Sulfide</span> and Silicate Melts</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Manoochehri, S.; Schmidt, M. W.; Guenther, D.</p> <p>2013-12-01</p> <p>Gravitational settling of immiscible, dense <span class="hlt">sulfide</span> melt droplets together with other cumulate phases such as chromite, combined with downward percolation of these droplets through a cumulate pile, is thought to be one of the possible processes leading to the formation of PGE rich <span class="hlt">sulfide</span> deposits in layered mafic intrusions. Furthermore some chromitite seams in the Merensky Reef (Bushveld Complex) are considered to be acting as a filter or barrier for further downward percolation of <span class="hlt">sulfide</span> melts into footwall layers. To investigate the feasibility of such mechanical processes and to study the partitioning behavior of 50 elements including transition <span class="hlt">metals</span> and REEs (but not PGEs) between a silicate and a <span class="hlt">sulfide</span> melt, two separate series of high temperature (1250-1380 °C) centrifuge-assisted experiments at 1000 g, 0.4-0.6 GPa were conducted. A synthetic silicate glass with a composition representative of the parental magma of the Bushveld Complex (~ 55 wt% SiO2) was mixed with pure FeS powder. For the first series of experiments, 15 or 25 wt% natural chromite with average grain sizes of ~ 5 or 31 μm were added to a mixture of silicate glass and FeS (10 wt%) adding 1 wt% water. For the second series, a mixture of the same glass and FeS was doped with 50 trace elements. These mixtures were first statically equilibrated and then centrifuged. In the first experimental series, <span class="hlt">sulfide</span> melt droplets settled together with, but did not segregate from chromite grains even after centrifugation at 1000 g for 12 hours. A change in initial chromite grain size and proportions didn't have any effect on segregation. Without chromite, the starting mixture resulted in the formation of large <span class="hlt">sulfide</span> melt pools together with finer droplets still disseminated through the silicate glass and both at the bottom of the capsule. The incomplete segregation of <span class="hlt">sulfide</span> melt is interpreted as being due to high interfacial energies between <span class="hlt">sulfide</span> and silicate melts/crystals which hinder</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://pubs.er.usgs.gov/publication/70028294','USGSPUBS'); return false;" href="https://pubs.er.usgs.gov/publication/70028294"><span>Platinum-group element, Gold, Silver and <span class="hlt">Base</span> <span class="hlt">Metal</span> distribution in compositionally zoned <span class="hlt">sulfide</span> droplets from the Medvezky Creek Mine, Noril'sk, Russia</span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Barnes, S.-J.; Cox, R.A.; Zientek, M.L.</p> <p>2006-01-01</p> <p>Concentrations of Ag, Au, Cd, Co, Re, Zn and Platinum-group elements (PGE) have been determined in <span class="hlt">sulfide</span> minerals from zoned <span class="hlt">sulfide</span> droplets of the Noril'sk 1 Medvezky Creek Mine. The aims of the study were; to establish whether these elements are located in the major <span class="hlt">sulfide</span> minerals (pentlandite, pyrrhotite, chalcopyrite and cubanite), to establish whether the elements show a preference for a particular <span class="hlt">sulfide</span> mineral and to investigate the model, which suggests that the zonation in the droplets is caused by the crystal fractionation of monosulfide solid solution (mss). Nickel, Cu, Ag, Re, Os, Ir, Ru, Rh and Pd, were found to be largely located in the major <span class="hlt">sulfide</span> minerals. In contrast, less than 25% of the Au, Cd, Pt and Zn in the rock was found to be present in these <span class="hlt">sulfides</span>. Osmium, Ir, Ru, Rh and Re were found to be concentrated in pyrrhotite and pentlandite. Palladium and Co was found to be concentrated in pentlandite. Silver, Cd and Zn concentrations are highest in chalcopyrite and cubanite. Gold and platinum showed no preference for any of the major <span class="hlt">sulfide</span> minerals. The enrichment of Os, Ir, Ru, Rh and Re in pyrrhotite and pentlandite (exsolution products of mss) and the low levels of these elements in the cubanite and chalcopyrite (exsolution products of intermediate solid solution, iss) support the mss crystal fractionation model, because Os, Ir, Ru, Rh and Re are compatible with mss. The enrichment of Ag, Cd and Zn in chalcopyrite and cubanite also supports the mss fractionation model these minerals are derived from the fractionated liquid and these elements are incompatible with mss and thus should be enriched in the fractionated liquid. Gold and Pt do not partition into either iss or mss and become sufficiently enriched in the final fractionated liquid to crystallize among the iss and mss grains as tellurides, bismithides and alloys. During pentlandite exsolution Pd appears to have diffused from the Cu-rich portion of the droplet into</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://pubs.er.usgs.gov/publication/70027018','USGSPUBS'); return false;" href="https://pubs.er.usgs.gov/publication/70027018"><span>Mineralogical and geochemical controls on the release of trace elements from slag produced by <span class="hlt">base</span>- and precious-<span class="hlt">metal</span> smelting at abandoned mine sites</span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Piatak, N.M.; Seal, R.R.; Hammarstrom, J.M.</p> <p>2004-01-01</p> <p>Slag collected from smelter sites associated with historic <span class="hlt">base-metal</span> mines contains elevated concentrations of trace elements such as Cu, Zn and Pb. Weathering of slag piles, many of which were deposited along stream banks, potentially may release these trace elements into the environment. Slags were sampled from the Ely and Elizabeth mines in the Vermont copper belt, from the copper Basin mining district at Ducktown, Tennessee and from the Clayton silver mine in the Bayhorse mining district, Idaho, in the USA. Primary phases in the slags include: olivine-group minerals, glass, spinels, <span class="hlt">sulfide</span> minerals and native <span class="hlt">metals</span> for Vermont samples; glass, <span class="hlt">sulfide</span> minerals and native <span class="hlt">metals</span> for the Ducktown sample; and olivine-group minerals, clinopyroxenes, spinels, <span class="hlt">sulfide</span> minerals, native <span class="hlt">metals</span> and other unidentified <span class="hlt">metallic</span> compounds for Clayton slag. Olivine-group minerals and pyroxenes are dominantly fayalitic and hedenbergitic in composition, respectively and contain up to 1.25 wt.% ZnO. Spinel minerals range between magnetite and hercynite in composition and contain Zn (up to 2.07 wt.% ZnO), Ti (up to 4.25 wt.% TiO2) and Cr (up to 1.39 wt.% Cr2O3). Cobalt, Ni, Cu, As, Ag, Sb and Pb occur in the glass phase, <span class="hlt">sulfides</span>, <span class="hlt">metallic</span> phases and unidentified <span class="hlt">metallic</span> compounds. Bulk slag trace-element chemistry shows that the <span class="hlt">metals</span> of the Vermont and Tennessee slags are dominated by Cu (1900-13,500 mg/kg) and Zn (2310-10,200 mg/kg), whereas the Clayton slag is dominated by Pb (63,000 mg/kg), Zn (19,700 mg/kg), Cu (7550 mg/kg), As (555 mg/kg), Sn (363 mg/kg) and Ag (200 mg/kg). Laboratory-<span class="hlt">based</span> leach tests indicate <span class="hlt">metals</span> can be released under simulated natural conditions. Leachates from most slags were found to contain elevated concentrations of Cu and Zn (up to 1800 and 470 ??g/l, respectively), well in excess of the acute toxicity guidelines for aquatic life. For the Idaho slag, the concentration of Pb in the leachate (11,000 ??g/l) is also in excess of the acute</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_11");'>11</a></li> <li><a href="#" onclick='return showDiv("page_12");'>12</a></li> <li class="active"><span>13</span></li> <li><a href="#" onclick='return showDiv("page_14");'>14</a></li> <li><a href="#" onclick='return showDiv("page_15");'>15</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_13 --> <div id="page_14" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_12");'>12</a></li> <li><a href="#" onclick='return showDiv("page_13");'>13</a></li> <li class="active"><span>14</span></li> <li><a href="#" onclick='return showDiv("page_15");'>15</a></li> <li><a href="#" onclick='return showDiv("page_16");'>16</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="261"> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4965148','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4965148"><span>The Novel, Nicotinic Alpha7 Receptor Partial Agonist, <span class="hlt">BMS</span>-933043, Improves Cognition and Sensory Processing in Preclinical Models of Schizophrenia</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Bristow, Linda J.; Easton, Amy E.; Li, Yu-Wen; Sivarao, Digavalli V.; Lidge, Regina; Jones, Kelli M.; Post-Munson, Debra; Daly, Christopher; Lodge, Nicholas J.; Gallagher, Lizbeth; Molski, Thaddeus; Pieschl, Richard; Chen, Ping; Hendricson, Adam; Westphal, Ryan; Cook, James; Iwuagwu, Christiana; Morgan, Daniel; Benitex, Yulia; King, Dalton; Macor, John E.; Zaczek, Robert; Olson, Richard</p> <p>2016-01-01</p> <p>The development of alpha7 nicotinic acetylcholine receptor agonists is considered a promising approach for the treatment of cognitive symptoms in schizophrenia patients. In the present studies we characterized the novel agent, (2R)-N-(6-(1H-imidazol-1-yl)-4-pyrimidinyl)-4'H-spiro[4-azabicyclo[2.2.2]octane-2,5'-[1,3]oxazol]-2'-amine (<span class="hlt">BMS</span>-933043), in vitro and in rodent models of schizophrenia-like deficits in cognition and sensory processing. <span class="hlt">BMS</span>-933043 showed potent binding affinity to native rat (Ki = 3.3 nM) and recombinant human alpha7 nicotinic acetylcholine receptors (Ki = 8.1 nM) and agonist activity in a calcium fluorescence assay (EC50 = 23.4 nM) and whole cell voltage clamp electrophysiology (EC50 = 0.14 micromolar (rat) and 0.29 micromolar (human)). <span class="hlt">BMS</span>-933043 exhibited a partial agonist profile relative to acetylcholine; the relative efficacy for net charge crossing the cell membrane was 67% and 78% at rat and human alpha7 nicotinic acetylcholine receptors respectively. <span class="hlt">BMS</span>-933043 showed no agonist or antagonist activity at other nicotinic acetylcholine receptor subtypes and was at least 300 fold weaker at binding to and antagonizing human 5-HT3A receptors (Ki = 2,451 nM; IC50 = 8,066 nM). <span class="hlt">BMS</span>-933043 treatment i) improved 24 hour novel object recognition memory in mice (0.1–10 mg/kg, sc), ii) reversed MK-801-induced deficits in Y maze performance in mice (1–10 mg/kg, sc) and set shift performance in rats (1–10 mg/kg, po) and iii) reduced the number of trials required to complete the extradimensional shift discrimination in neonatal PCP treated rats performing the intra-dimensional/extradimensional set shifting task (0.1–3 mg/kg, po). <span class="hlt">BMS</span>-933043 also improved auditory gating (0.56–3 mg/kg, sc) and mismatch negativity (0.03–3 mg/kg, sc) in rats treated with S(+)ketamine or neonatal phencyclidine respectively. Given this favorable preclinical profile <span class="hlt">BMS</span>-933043 was selected for further development to support clinical evaluation in humans. PMID</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/27527508','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/27527508"><span>Cost-effectiveness of percutaneous coronary intervention with cobalt-chromium everolimus eluting stents versus bare <span class="hlt">metal</span> stents: Results from a patient level meta-analysis of randomized trials.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Ferko, Nicole; Ferrante, Giuseppe; Hasegawa, James T; Schikorr, Tanya; Soleas, Ireena M; Hernandez, John B; Sabaté, Manel; Kaiser, Christoph; Brugaletta, Salvatore; de la Torre Hernandez, Jose Maria; Galatius, Soeren; Cequier, Angel; Eberli, Franz; de Belder, Adam; Serruys, Patrick W; Valgimigli, Marco</p> <p>2017-05-01</p> <p>Second-generation drug eluting stents (DES) may reduce costs and improve clinical outcomes compared to first-generation DES with improved cost-effectiveness when compared to bare <span class="hlt">metal</span> stents (<span class="hlt">BMS</span>). We aimed to conduct an economic evaluation of a cobalt-chromium everolimus eluting stent (Co-Cr EES) compared with <span class="hlt">BMS</span> in percutaneous coronary intervention (PCI). To conduct a cost-effectiveness analysis (CEA) of a cobalt-chromium everolimus eluting stent (Co-Cr EES) versus <span class="hlt">BMS</span> in PCI. A Markov state transition model with a 2-year time horizon was applied from a US Medicare setting with patients undergoing PCI with Co-Cr EES or <span class="hlt">BMS</span>. Baseline characteristics, treatment effects, and safety measures were taken from a patient level meta-analysis of 5 RCTs (n = 4,896). The <span class="hlt">base</span>-case analysis evaluated stent-related outcomes; a secondary analysis considered the broader set of outcomes reported in the meta-analysis. The <span class="hlt">base</span>-case and secondary analyses reported an additional 0.018 and 0.013 quality-adjusted life years (QALYs) and cost savings of $236 and $288, respectively with Co-Cr EES versus <span class="hlt">BMS</span>. Results were robust to sensitivity analyses and were most sensitive to the price of clopidogrel. In the probabilistic sensitivity analysis, Co-Cr EES was associated with a greater than 99% chance of being cost saving or cost effective (at a cost per QALY threshold of $50,000) versus <span class="hlt">BMS</span>. Using data from a recent patient level meta-analysis and contemporary cost data, this analysis found that PCI with Co-Cr EES is more effective and less costly than PCI with <span class="hlt">BMS</span>. © 2016 The Authors. Catheterization and Cardiovascular Interventions Published by Wiley Periodicals, Inc. © 2016 The Authors. Catheterization and Cardiovascular Interventions Published by Wiley Periodicals, Inc.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.dtic.mil/docs/citations/ADA284406','DTIC-ST'); return false;" href="http://www.dtic.mil/docs/citations/ADA284406"><span>Acid Volatile <span class="hlt">Sulfides</span> and Simultaneously Extracted Copper, Lead, and Zinc in Sediments of Sinclair Inlet, Washington</span></a></p> <p><a target="_blank" href="http://www.dtic.mil/">DTIC Science & Technology</a></p> <p></p> <p>1993-09-01</p> <p>to Doug Vaught, J. Towell, and Eric Schlierman of Puget Sound Naval Shipyard for providing laboratory space, equipment, and logistical support for the...availability and mobility of toxic <span class="hlt">metal</span> contamination in the sediments of Sinclair Inlet, Puget Sound , Washington, acid volatile <span class="hlt">sulfide</span> (AVS) and... Puget Sound , Washington ........ 1 2. Apparatus used for measuring acid volatile <span class="hlt">sulfides</span> ........................... 5 3. <span class="hlt">Sulfide</span> electrode</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=2268822','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=2268822"><span>Layered <span class="hlt">metal</span> <span class="hlt">sulfides</span>: Exceptionally selective agents for radioactive strontium removal</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Manos, Manolis J.; Ding, Nan; Kanatzidis, Mercouri G.</p> <p>2008-01-01</p> <p>In this article, we report the family of robust layered <span class="hlt">sulfides</span> K2xMnxSn3-xS6 (x = 0.5–0.95) (KMS-1). These materials feature hexagonal [MnxSn3-xS6]2x− slabs of the CdI2 type and contain highly mobile K+ ions in their interlayer space that are easily exchangeable with other cations and particularly strontium. KMS-1 display outstanding preference for strontium ions in highly alkaline solutions containing extremely large excess of sodium cations as well as in acidic environment where most alternative adsorbents with oxygen ligands are nearly inactive. The implication of these results is that simple layered <span class="hlt">sulfides</span> should be considered for the efficient remediation of certain nuclear wastes. PMID:18316731</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://ntrs.nasa.gov/search.jsp?R=19880039214&hterms=company&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D30%26Ntt%3DThe%2Bcompany','NASA-TRS'); return false;" href="https://ntrs.nasa.gov/search.jsp?R=19880039214&hterms=company&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D30%26Ntt%3DThe%2Bcompany"><span>Zelda and company - Petrogenesis of <span class="hlt">sulfide</span>-rich Fremdlinge and constraints on solar nebula processes</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Armstrong, John T.; Hutcheon, Ian D.; Wasserburg, G. J.</p> <p>1987-01-01</p> <p>A detailed petrographic and chemical study of Zelda (a gigantic <span class="hlt">sulfide</span>-rich Fremdling from the Allende Ca-rich inclusion, CAI, Egg 6) and its contact with the host was conducted using analytical SEM and electron-microprobe techniques, and the results were compared with those obtained on other <span class="hlt">sulfide</span>-rich and oxide-rich Fremdlinge. Strong evidence is presented that Zelda, a type-example of <span class="hlt">sulfide</span>-rich Fremdlinge, has been formed from a preexisting Ur-Fremdling, similar by composition to Willy, by closed-system <span class="hlt">sulfidization</span> of magnetite and <span class="hlt">metal</span>. At least two different <span class="hlt">sulfidization</span> mechanisms appear to have occurred in altering Fremdlinge: one producing compositionally homogeneous equigranular objects such as Zelda, the other producing compositionally and texturally heterogeneous objects.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://pubs.usgs.gov/of/1982/0176/report.pdf','USGSPUBS'); return false;" href="https://pubs.usgs.gov/of/1982/0176/report.pdf"><span>Iron <span class="hlt">sulfide</span> deposits at Wadi Wassat, Kingdom of Saudi Arabia</span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Roberts, R.J.; Rossman, D.L.; Bagdady, A.Y.; Conway, C.M.; Helaby, A.M.</p> <p>1981-01-01</p> <p>Massive and disseminated iron <span class="hlt">sulfide</span> deposits in Wadi Wassat form lenticular, stratabound deposits in cherty Precambrian sedimentary rocks interlayered with Precambrian calcareous sedimentary rocks, pyroclastic rocks, and andesitic flow rocks. These rocks have been cut by a wide variety of plutonic and dike rocks including gabbro, diorite, granodiorite, diabase, rhyolite, and granite. The zone containing the <span class="hlt">sulfide</span> lenses is nearly 16 km long and is cut off by granitic rocks at both the northern and southern ends. The lenses are as much as 200 m thick; one can be traced along strike for more than 4 km. The lenses consist mostly of iron <span class="hlt">sulfides</span>. Pyrite is the principal <span class="hlt">sulfide</span> mineral; near intrusive bodies the pyrite has been partially converted to pyrrhotite and locally mobilized into fractures. The <span class="hlt">sulfides</span> have been oxidized to a depth of about 25 m. Preliminary calculations indicate that about 107,500,000 tons of <span class="hlt">sulfides</span>, averaging 40 percent iron and 35 percent sulfur, are available to a depth of i00 m. Small amounts of nickel, cobalt, zinc, and copper are also present, but at <span class="hlt">metal</span> prices prevailing in early 1981, these do not constitute significant resources.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/27093236','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/27093236"><span>Vegetation successfully prevents oxidization of <span class="hlt">sulfide</span> minerals in mine tailings.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Li, Yang; Sun, Qingye; Zhan, Jing; Yang, Yang; Wang, Dan</p> <p>2016-07-15</p> <p>The oxidization of <span class="hlt">metal</span> <span class="hlt">sulfide</span> in tailings causes acid mine drainage. However, it remains unclear whether vegetation prevents the oxidization of <span class="hlt">metal</span> <span class="hlt">sulfides</span>. The oxidization characteristics and microbial indices of the tailings in the presence of various plant species were investigated to explore the effects of vegetation on the oxidization of <span class="hlt">sulfide</span> minerals in tailings. The pH, reducing sulfur, free iron oxides (Fed), chemical oxygen consumption (COC) and biological oxygen consumption (BOC) were measured. Key iron- and sulfur-oxidizing bacteria (Acidithiobacillus spp., Leptospirillum spp. and Thiobacillus spp.) were quantified using real-time PCR. The results indicate that vegetation growing on tailings can effectively prevent the oxidization of <span class="hlt">sulfide</span> minerals in tailings. A higher pH and reducing-sulfur content and lower Fed were observed in the 0-30 cm depth interval in the presence of vegetation compared to bare tailings (BT). The COC gradually decreased with depth in all of the soil profiles; specifically, the COC rapidly decreased in the 10-20 cm interval in the presence of vegetation but gradually decreased in the BT profiles. Imperata cylindrica (IC) and Chrysopogon zizanoides (CZ) profiles contained the highest BOC in the 10-20 cm interval. The abundance of key iron- and sulfur-oxidizing bacteria in the vegetated tailings were significantly lower than in the BT; in particular, IC was associated with the lowest iron- and sulfur-oxidizing bacterial abundance. In conclusion, vegetation successfully prevented the oxidization of <span class="hlt">sulfide</span> minerals in the tailings, and Imperata cylindrica is the most effective in reducing the number of iron- and sulfur-oxidizing bacteria and helped to prevent the oxidization of <span class="hlt">sulfide</span> minerals in the long term. Copyright © 2016 Elsevier Ltd. All rights reserved.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/pages/biblio/1281142-metal-sulfide-mineral-ores-fenton-chemistry-disease-particle-induced-inflammatory-stress-response-lung-cells','SCIGOV-DOEP'); return false;" href="https://www.osti.gov/pages/biblio/1281142-metal-sulfide-mineral-ores-fenton-chemistry-disease-particle-induced-inflammatory-stress-response-lung-cells"><span><span class="hlt">Metal-sulfide</span> mineral ores, Fenton chemistry and disease. Particle induced inflammatory stress response in lung cells</span></a></p> <p><a target="_blank" href="http://www.osti.gov/pages">DOE PAGES</a></p> <p>Harrington, Andrea D.; Smirnov, Alexander; Tsirka, Stella E.; ...</p> <p>2014-07-10</p> <p>The inhalation of mineral particulates and other earth materials, such as coal, can initiate or enhance disease in humans. Workers in occupations with high particulate exposure, such as mining, are particularly at risk. The ability of a material to generate an inflammatory stress response (ISR), a measure of particle toxicity, is a useful tool in evaluating said exposure risk. ISR is defined as the upregulation of cellular reactive oxygen species (ROS) normalized to cell viability. This study compares the ISR of A549 human lung epithelial cells after exposure to well-characterized common <span class="hlt">metal-sulfide</span> ore mineral separates. The evaluation of the deleteriousmore » nature of ore minerals is <span class="hlt">based</span> on a range of particle loadings (serial dilutions of 0.002 m 2/mL stock) and exposure periods (beginning at 30 min and measured systematically for up to 24 h). There is a wide range in ISR values generated by the ore minerals. The ISR values produced by the sphalerite samples are within the range of inert materials. Arsenopyrite generated a small ISR that was largely driven by cell death. Galena showed a similar, but more pronounced response. Copper-bearing ore minerals generated the greatest ISR, both by upregulating cellular ROS and generating substantial and sustained cell death. Chalcopyrite and bornite, both containing ferrous iron, generated the greatest ISR overall. Particles containing Fenton <span class="hlt">metals</span> as major constituents produce the highest ISR, while other heavy <span class="hlt">metals</span> mainly generate cell death. Furthermore, this study highlights the importance of evaluating the chemistry, oxidation states and structure of a material when assessing risk management.« less</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/servlets/purl/1281142','SCIGOV-STC'); return false;" href="https://www.osti.gov/servlets/purl/1281142"><span><span class="hlt">Metal-sulfide</span> mineral ores, Fenton chemistry and disease. Particle induced inflammatory stress response in lung cells</span></a></p> <p><a target="_blank" href="http://www.osti.gov/search">DOE Office of Scientific and Technical Information (OSTI.GOV)</a></p> <p>Harrington, Andrea D.; Smirnov, Alexander; Tsirka, Stella E.</p> <p></p> <p>The inhalation of mineral particulates and other earth materials, such as coal, can initiate or enhance disease in humans. Workers in occupations with high particulate exposure, such as mining, are particularly at risk. The ability of a material to generate an inflammatory stress response (ISR), a measure of particle toxicity, is a useful tool in evaluating said exposure risk. ISR is defined as the upregulation of cellular reactive oxygen species (ROS) normalized to cell viability. This study compares the ISR of A549 human lung epithelial cells after exposure to well-characterized common <span class="hlt">metal-sulfide</span> ore mineral separates. The evaluation of the deleteriousmore » nature of ore minerals is <span class="hlt">based</span> on a range of particle loadings (serial dilutions of 0.002 m 2/mL stock) and exposure periods (beginning at 30 min and measured systematically for up to 24 h). There is a wide range in ISR values generated by the ore minerals. The ISR values produced by the sphalerite samples are within the range of inert materials. Arsenopyrite generated a small ISR that was largely driven by cell death. Galena showed a similar, but more pronounced response. Copper-bearing ore minerals generated the greatest ISR, both by upregulating cellular ROS and generating substantial and sustained cell death. Chalcopyrite and bornite, both containing ferrous iron, generated the greatest ISR overall. Particles containing Fenton <span class="hlt">metals</span> as major constituents produce the highest ISR, while other heavy <span class="hlt">metals</span> mainly generate cell death. Furthermore, this study highlights the importance of evaluating the chemistry, oxidation states and structure of a material when assessing risk management.« less</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4256167','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4256167"><span><span class="hlt">Metal-Sulfide</span> Mineral Ores, Fenton Chemistry and Disease – Particle Induced Inflammatory Stress Response in Lung Cells</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Harrington, Andrea D.; Smirnov, Alexander; Tsirka, Stella E.; Schoonen, Martin A.A.</p> <p>2014-01-01</p> <p>The inhalation of mineral particulates and other earth materials, such as coal, can initiate or enhance disease in humans. Workers in occupations with high particulate exposure, such as mining, are particularly at risk. The ability of a material to generate an inflammatory stress response (ISR), a measure of particle toxicity, is a useful tool in evaluating said exposure risk. ISR is defined as the upregulation of cellular reactive oxygen species (ROS) normalized to cell viability. This study compares the ISR of A549 human lung epithelial cells after exposure to well-characterized common <span class="hlt">metal-sulfide</span> ore mineral separates. The evaluation of the deleterious nature of ore minerals is <span class="hlt">based</span> on a range of particle loadings (serial dilutions of 0.002 m2/mL stock) and exposure periods (beginning at 30 minutes and measured systematically for up to 24 hours). There is a wide range in ISR values generated by the ore minerals. The ISR values produced by the sphalerite samples are within the range of inert materials. Arsenopyrite generated a small ISR that was largely driven by cell death. Galena showed a similar, but more pronounced response. Copper-bearing ore minerals generated the greatest ISR, both by upregulating cellular ROS and generating substantial and sustained cell death. Chalcopyrite and bornite, both containing ferrous iron, generated the greatest ISR overall. Particles containing Fenton <span class="hlt">metals</span> as major constituents produce the highest ISR, while other heavy <span class="hlt">metals</span> mainly generate cell death. This study highlights the importance of evaluating the chemistry, oxidation states and structure of a material when assessing risk management. PMID:25107347</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://pubs.er.usgs.gov/publication/70177020','USGSPUBS'); return false;" href="https://pubs.er.usgs.gov/publication/70177020"><span>A field investigation of the relationship between zinc and acid volatile <span class="hlt">sulfide</span> concentrations in freshwater sediments</span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Ankley, Gerald T.; Liber, Karsten; Call, Daniel J.; Markee, Thomas P.; Canfield, Timothy J.; Ingersoll, Christopher G.</p> <p>1996-01-01</p> <p>Understanding relationships between cationic <span class="hlt">metals</span> such as cadmium, copper, nickel, lead and zinc, and amorphous iron <span class="hlt">sulfides</span>, measured as acid volatile <span class="hlt">sulfide</span> (AVS), is key to predicting <span class="hlt">metal</span> bioavailability and toxicity insediments. The objective of the present study was to assess seasonal and spatial variations of AVS in freshwater sediments contaminated with zinc. Sediments were sampled from three streams with varying levels of zinc contamination at two different times, March and June of 1995, representing cold- and warm-weather situations. Interstitial (pore) water concentrations of zinc, and solid phase concentrations of AVS and zinc were measured in surficial and deep sediment horizons. Toxicity tests (10-d) with the amphipodHyalella azteca were conducted using intact cores. Sediment zinc concentrations from six sites within the primary test stream differed by about five-fold, and also varied seasonally. Acid volatile <span class="hlt">sulfide</span> concentrations were generally lower than those of zinc, and pore water zinc concentrations typically were elevated. There was a positive correlation between solid-phase AVS and zinc concentrations, suggesting that the system was dominated by zinc, as opposed to iron <span class="hlt">sulfides</span>. In contrast to expectations arising from some studies of seasonal variations of AVS in iron-dominated systems, AVS concentrations were smaller in June than in March. However, this was likely due to a major storm event and associated sediment scouring before the June sampling, rather than to seasonal processes related to variations in temperature and dissolved oxygen. <span class="hlt">Based</span> upon an indirect analysis of depth variations in AVS, there was some indication that zinc <span class="hlt">sulfide</span> might be less prone to oxidation than iron <span class="hlt">sulfide</span>. There was a strong correlation between toxicity of the sediment samples toH. azteca and interstitial water concentrations of zinc; however, the possible contribution of other contaminants to sediment toxicity cannot be dismissed.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2017EGUGA..19.7290C','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2017EGUGA..19.7290C"><span>Heavy <span class="hlt">metals</span> contamination and their risk assessment around the abandoned <span class="hlt">base</span> <span class="hlt">metals</span> and Au-Ag mines in Korea</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Chon, Hyo-Taek</p> <p>2017-04-01</p> <p>Heavy <span class="hlt">metals</span> contamination in the areas of abandoned Au-Ag and <span class="hlt">base</span> <span class="hlt">metal</span> mines in Korea was investigated in order to assess the level of <span class="hlt">metal</span> pollution, and to draw general summaries about the fate of toxic heavy <span class="hlt">metals</span> in different environments. Efforts have been made to compare the level of heavy <span class="hlt">metals</span>, chemical forms, and plant uptake of heavy <span class="hlt">metals</span> in each mine site. In the <span class="hlt">base-metals</span> mine areas, significant levels of Cd, Cu, Pb and Zn were found in mine dump soils developed over mine waste materials and tailings. Leafy vegetables tend to accumulate heavy <span class="hlt">metals</span>(in particular, Cd and Zn) higher than other crop plants, and high <span class="hlt">metal</span> concentrations in rice crops may affect the local residents' health. In the Au-Ag mining areas, arsenic would be the most characteristic contaminant in the nearby environment. Arsenic and heavy <span class="hlt">metals</span> were found to be mainly associated with <span class="hlt">sulfide</span> gangue minerals, and the mobility of these <span class="hlt">metals</span> would be enhanced by the effect of continuing weathering and oxidation. According to the sequential extraction of <span class="hlt">metals</span> in soils, most heavy <span class="hlt">metals</span> were identified as non-residual chemical forms, and those are very susceptible to the change of ambient conditions of a nearby environment. The concept of pollution index(PI) of soils gives important information on the extent and degree of multi-element contamination, and can be applied to the evaluation of mine soils before their agricultural use and remediation. The risk assessment process comprising exposure assessment, dose-response assessment, and risk characterization was discussed, and the results of non-cancer risk of As, Cd, and Zn, and those of cancer risk of As were suggested.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/biblio/22645534-acanthiteargentite-transformation-nanocrystalline-silver-sulfide-ag-sub-ag-nanoheterostructure','SCIGOV-STC'); return false;" href="https://www.osti.gov/biblio/22645534-acanthiteargentite-transformation-nanocrystalline-silver-sulfide-ag-sub-ag-nanoheterostructure"><span>Acanthite–argentite transformation in nanocrystalline silver <span class="hlt">sulfide</span> and the Ag{sub 2}S/Ag nanoheterostructure</span></a></p> <p><a target="_blank" href="http://www.osti.gov/search">DOE Office of Scientific and Technical Information (OSTI.GOV)</a></p> <p>Gusev, A. I., E-mail: gusev@ihim.uran.ru; Sadovnikov, S. I.</p> <p></p> <p>Nanocrystalline acanthite-structured silver <span class="hlt">sulfide</span> of the monoclinic structure and a Ag{sub 2}S/Ag nanoheterostructure are produced. The high-temperature X-ray diffraction technique is applied to the in situ study of the (acanthite α-Ag{sub 2}S)–(argentite β-Ag{sub 2}S) phase transformation in nanocrystalline silver <span class="hlt">sulfide</span>. The crystal structure of argentite is refined, and it is found that the content of vacant sites in the <span class="hlt">metal</span> sublattice of argentite exceeds 92%. A model of a resistive switch, whose operation is <span class="hlt">based</span> on the reversible acanthite–argentite transformation in a Ag{sub 2}S/Ag heterostructure, is considered.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3153037','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3153037"><span>Thermodynamics and Kinetics of <span class="hlt">Sulfide</span> Oxidation by Oxygen: A Look at Inorganically Controlled Reactions and Biologically Mediated Processes in the Environment</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Luther, George W.; Findlay, Alyssa J.; MacDonald, Daniel J.; Owings, Shannon M.; Hanson, Thomas E.; Beinart, Roxanne A.; Girguis, Peter R.</p> <p>2011-01-01</p> <p>The thermodynamics for the first electron transfer step for <span class="hlt">sulfide</span> and oxygen indicates that the reaction is unfavorable as unstable superoxide and bisulfide radical ions would need to be produced. However, a two-electron transfer is favorable as stable S(0) and peroxide would be formed, but the partially filled orbitals in oxygen that accept electrons prevent rapid kinetics. Abiotic <span class="hlt">sulfide</span> oxidation kinetics improve when reduced iron and/or manganese are oxidized by oxygen to form oxidized <span class="hlt">metals</span> which in turn oxidize <span class="hlt">sulfide</span>. Biological sulfur oxidation relies on enzymes that have evolved to overcome these kinetic constraints to affect rapid <span class="hlt">sulfide</span> oxidation. Here we review the available thermodynamic and kinetic data for H2S and HS• as well as O2, reactive oxygen species, nitrate, nitrite, and NOx species. We also present new kinetic data for abiotic <span class="hlt">sulfide</span> oxidation with oxygen in trace <span class="hlt">metal</span> clean solutions that constrain abiotic rates of <span class="hlt">sulfide</span> oxidation in <span class="hlt">metal</span> free solution and agree with the kinetic and thermodynamic calculations. Moreover, we present experimental data that give insight on rates of chemolithotrophic and photolithotrophic <span class="hlt">sulfide</span> oxidation in the environment. We demonstrate that both anaerobic photolithotrophic and aerobic chemolithotrophic <span class="hlt">sulfide</span> oxidation rates are three or more orders of magnitude higher than abiotic rates suggesting that in most environments biotic <span class="hlt">sulfide</span> oxidation rates will far exceed abiotic rates due to the thermodynamic and kinetic constraints discussed in the first section of the paper. Such data reshape our thinking about the biotic and abiotic contributions to <span class="hlt">sulfide</span> oxidation in the environment. PMID:21833317</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2016PhyB..496..106O','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2016PhyB..496..106O"><span>Morphology and thermal studies of zinc <span class="hlt">sulfide</span> and cadmium <span class="hlt">sulfide</span> nanoparticles in polyvinyl alcohol matrix</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Osuntokun, Jejenija; Ajibade, Peter A.</p> <p>2016-09-01</p> <p>Zn(II) and Cd(II) <span class="hlt">metal</span> complexes of 1-cyano-1-carboethoxyethylene-2,2-dithiolato-κS,S'-bis(N,N-dimethylthiourea-κS) have been synthesized and characterized with analytical and spectroscopic techniques. The complexes were thermolysed in hexadecylamine at 200 °C to prepare ZnS and CdS nanoparticles. The nanoparticles were characterized with scanning electron microscope (SEM), transmission electron microscope (TEM), and powder X-ray diffraction (p-XRD). TEM images showed spherically shaped nanoparticles, whose sizes are in the range 4.33-7.21 nm for ZnS and 4.95-7.7 nm CdS respectively and XRD confirmed cubic crystalline phases for the nanoparticles. The optical band gap energy evaluated from the absorption spectra are 2.88 eV (430 nm) and 2.81 eV (440 nm) for the ZnS and CdS nanoparticles respectively. The as-prepared <span class="hlt">metal</span> <span class="hlt">sulfide</span> nanoparticles were further incorporated into polyvinyl alcohol (PVA) to give ZnS/PVA and CdS/PVA composites. The polymer nanocomposites were studied to investigate their morphology and thermal properties relative to the pure PVA. XRD diffractions indicated that the crystalline phases of the nanoparticles and the sizes in PVA matrices remained unaltered. Infra-red spectra studies revealed interactions between the PVA and the <span class="hlt">metal</span> <span class="hlt">sulfide</span> nanoparticles and TGA studies show that the ZnS/PVA and CdS/PVA nanocomposites exhibit better thermal stability than the pure PVA.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2014PhDT.......495K','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2014PhDT.......495K"><span>Non-hydrolytic Sol-gel Synthesis of Tin <span class="hlt">Sulfides</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Kaur, Rajvinder</p> <p></p> <p>The non-hydrolytic sol-gel (NHSG) process is an effective low temperature route well known for preparing homogeneous <span class="hlt">metal</span> oxides. Thermodynamically as well as kinetically favored products, which cannot be prepared with the traditional solid-state routes, can be produced using NHSG. This project is focused on the exploration of NHSG synthesis of binary tin <span class="hlt">sulfides</span>. In the past few years, <span class="hlt">metal</span> <span class="hlt">sulfides</span> have been the subject of significant interest. Much effort has been devoted to understand these materials because of their potential applications in electronic, optical, and superconductor devices.4 Among these materials, tin <span class="hlt">sulfides</span> are materials of technological importance, which are being explored as semiconductors, anode materials for Li ion batteries, photoconductors, photocatalysts and absorber layer materials in photovoltaic solar cell devices. All of these applications depend upon features like homogeneity, oxidation state, high surface area and purity of the materials. These properties can be difficult to achieve by employing traditional synthetic routes, which require high temperatures due to slow diffusion, limiting the products to thermodynamically stable phases and prohibiting control over properties like particle size and surface area. A variety of low temperature methods are being explored due to the increased demand for such advanced materials. This project is focused on exploring the NHSG approach to synthesize binary tin <span class="hlt">sulfides</span>, with the main goal of establishing conditions for the targeted synthesis of different tin <span class="hlt">sulfide</span> polymorphs with controlled particle size. Being non-oxide materials, tin <span class="hlt">sulfides</span> can be air sensitive, which requires special attention in handling. All reactions were carried out in absence of oxygen. This project explores the reaction of tin halides with thioethers in a dry solvent medium, leading to the formation of tin <span class="hlt">sulfides</span>. There are a number of synthetic parameters that can be varied for the NHSG approach. A</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2009AGUFM.V43E2320M','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2009AGUFM.V43E2320M"><span>Mineralogy and Geochemical Processes of Carbonate Mineral-rich <span class="hlt">Sulfide</span> Mine Tailings, Zimapan, Mexico</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>McClure, R. J.; Deng, Y.; Loeppert, R.; Herbert, B. E.; Carrillo, R.; Gonzalez, C.</p> <p>2009-12-01</p> <p>Mining for silver, lead, zinc, and copper in Zimapan, Hidalgo State, Mexico has been ongoing since 1576. High concentrations of heavy <span class="hlt">metals</span> have been found in several mine tailing heaps in the Zimapan area, with concentrations of arsenic observed as high as 28,690 mg/kg and levels of Pb as high as 2772 mg/kg. Unsecured tailings heaps and associated acid mine drainage has presented tremendous problems to revegetation, water quality, and dust emission control in the Zimapan area. Although acid mine drainage problems related to weathering of <span class="hlt">sulfide</span> minerals have been extensively studied and are well known, the weathering products of <span class="hlt">sulfides</span> in areas with a significant presence of carbonate minerals and their effect on the mobility of heavy <span class="hlt">metals</span> warrant further study. Carbonate minerals are expected to neutralize sulfuric acid produced from weathering of <span class="hlt">sulfide</span> minerals, however, in the Zimapan area localized areas of pH as low as 1.8 were observed within carbonate mineral-rich tailing heaps. The objectives of this study are to characterize (1) the heavy <span class="hlt">metal</span>-containing <span class="hlt">sulfide</span> minerals in the initial tailing materials, (2) the intermediate oxidation products of <span class="hlt">sulfide</span> minerals within the carbonate-rich tailings, (3) chemical species of heavy <span class="hlt">metals</span> within pH gradients between 1.8 and 8.2, the approximate natural pH of limestone, and (4) the mobility of soluble and colloidal heavy <span class="hlt">metals</span> and arsenic within the carbonate-rich tailings. Representative mine tailings and their intermediate oxidation products have been sampled from the Zimapan area. Mineralogical characterization will be conducted with X-ray diffraction, infrared spectroscopy, electron microscopes and microprobes, and chemical methods. Chemical species will be extracted by selective dissolution methods. Preliminary results have identified calcite as the dominant mineral in the tailing heaps with a pH of 7, suggesting non-equilibrium with the acidic weathering products. Other minerals identified in</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/24084376','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/24084376"><span>Acid-volatile <span class="hlt">sulfide</span> and simultaneously extracted <span class="hlt">metals</span> in surface sediments of the southwestern coastal Laizhou Bay, Bohai Sea: concentrations, spatial distributions and the indication of heavy <span class="hlt">metal</span> pollution status.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Zhuang, Wen; Gao, Xuelu</p> <p>2013-11-15</p> <p>Surface sediments were collected from the coastal waters of southwestern Laizhou Bay and the rivers it connects with during summer and autumn 2012. The acid-volatile <span class="hlt">sulfide</span> (AVS) and simultaneously extracted <span class="hlt">metals</span> (SEM) were measured to assess the sediment quality. The results showed that not all sediments with [SEM]-[AVS]>0 were capable of causing toxicity because the organic carbon is also an important <span class="hlt">metal</span>-binding phase in sediments. Suppose the sediments had not been disturbed and the criteria of US Environmental Protection Agency had been followed, heavy <span class="hlt">metals</span> in this area had no adverse biological effects in both seasons except for few riverine samples. The major ingredient of SEM was Zn, whereas the contribution of Cd - the most toxic <span class="hlt">metal</span> studied - to SEM was <1%. The distributions of AVS and SEM in riverine sediments were more easily affected by anthropogenic activity compared with those in marine sediments. Copyright © 2013 Elsevier Ltd. All rights reserved.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/22305828','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/22305828"><span>Newest-generation drug-eluting and bare-<span class="hlt">metal</span> stents combined with prasugrel-<span class="hlt">based</span> antiplatelet therapy in large coronary arteries: the BAsel Stent Kosten Effektivitäts Trial PROspective Validation Examination part II (BASKET-PROVE II) trial design.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Jeger, Raban; Pfisterer, Matthias; Alber, Hannes; Eberli, Franz; Galatius, Søren; Naber, Christoph; Pedrazzini, Giovanni; Rickli, Hans; Jensen, Jan Skov; Vuilliomenet, André; Gilgen, Nicole; Kaiser, Christoph</p> <p>2012-02-01</p> <p>In the BAsel Stent Kosten Effektivitäts Trial PROspective Validation Examination (BASKET-PROVE), drug-eluting stents (DESs) had similar 2-year rates of death and myocardial infarction but lower rates of target vessel revascularization and major adverse cardiac events compared with bare-<span class="hlt">metal</span> stents (BMSs). However, comparative clinical effects of newest-generation DES with biodegradable polymers vs second-generation DES or newest-generation <span class="hlt">BMS</span> with biocompatible coatings, all combined with a prasugrel-<span class="hlt">based</span> antiplatelet therapy, on 2-year outcomes are not known. In BASKET-PROVE II, 2,400 patients with de novo lesions in native vessels ≥3 mm in diameter are randomized 1:1:1 to receive a conventional DES, a DES with a biodegradable polymer, or a <span class="hlt">BMS</span> with biocompatible coating. In addition to aspirin, stable patients with <span class="hlt">BMS</span> will receive prasugrel for 1 month, whereas all others will receive prasugrel for 12 months. The primary end point will be combined cardiac death, nonfatal myocardial infarction, and target vessel revascularization up to 2 years. Secondary end points include stent thrombosis and major bleeding. The primary aim is to test (1) the noninferiority of a biodegradable-polymer DES to a conventional DES and (2) the superiority of both DESs to <span class="hlt">BMS</span>. A secondary aim is to compare the outcomes with those of BASKET-PROVE regarding the effects of prasugrel-<span class="hlt">based</span> vs clopidogrel-<span class="hlt">based</span> antiplatelet therapy. By the end of 2010, 878 patients (37% of those planned) were enrolled. This study will test the comparative long-term safety and efficacy of newest-generation stents on the background of contemporary antiplatelet therapy in a large all-comer population undergoing large native coronary artery stenting. Copyright © 2012 Mosby, Inc. All rights reserved.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/29797801','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/29797801"><span><span class="hlt">Metal</span>- and Additive-Free Oxidation of <span class="hlt">Sulfides</span> into Sulfoxides by Fullerene-Modified Carbon Nitride with Visible-Light Illumination.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Chen, Xi; Deng, Kejian; Zhou, Peng; Zhang, Zehui</p> <p>2018-05-24</p> <p>Photocatalytic selective oxidation has attracted considerable attention as an environmentally friendly strategy for organic transformations. Some methods have been reported for the photocatalytic oxidation of <span class="hlt">sulfides</span> into sulfoxides in recent years. However, the practical application of these processes is undermined by several challenges, such as low selectivity, sluggish reaction rates, the requirement of UV-light irradiation, the use of additives, and the instability of the photocatalyst. Herein, a <span class="hlt">metal</span>-free C 60 /graphitic carbon nitride (g-C 3 N 4 ) composite photocatalyst was fabricated by a facile method, and well characterized by TEM, SEM, FTIR spectroscopy, XRD, X-ray photoelectron spectroscopy, diffuse reflectance spectroscopy, and photoluminescence spectroscopy. The C 60 /g-C 3 N 4 catalyst exhibited a high photocatalytic activity at room temperature for the selective oxidation of <span class="hlt">sulfides</span> into the corresponding sulfoxides in the presence of other functional groups, due to the synergetic roles of C 60 and g-C 3 N 4 . Several important parameters have been screened, and this method afforded good to excellent yields of sulfoxides under optimal conditions. The superoxide radical ( . O 2 - ) and singlet oxygen ( 1 O 2 ) were identified as the oxidative species for the oxidation of <span class="hlt">sulfides</span> into sulfoxides by exploring EPR experiments, and hence, a plausible mechanism for this oxidation was proposed. Moreover, the C 60 /g-C 3 N 4 catalyst can be easily recovered by filtration and then reused at least four times without loss in activity. © 2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_12");'>12</a></li> <li><a href="#" onclick='return showDiv("page_13");'>13</a></li> <li class="active"><span>14</span></li> <li><a href="#" onclick='return showDiv("page_15");'>15</a></li> <li><a href="#" onclick='return showDiv("page_16");'>16</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_14 --> <div id="page_15" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_13");'>13</a></li> <li><a href="#" onclick='return showDiv("page_14");'>14</a></li> <li class="active"><span>15</span></li> <li><a href="#" onclick='return showDiv("page_16");'>16</a></li> <li><a href="#" onclick='return showDiv("page_17");'>17</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="281"> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/biblio/1400310-rapid-microwave-assisted-preparation-binary-ternary-transition-metal-sulfide-compounds','SCIGOV-STC'); return false;" href="https://www.osti.gov/biblio/1400310-rapid-microwave-assisted-preparation-binary-ternary-transition-metal-sulfide-compounds"><span>Rapid microwave-assisted preparation of binary and ternary transition <span class="hlt">metal</span> <span class="hlt">sulfide</span> compounds</span></a></p> <p><a target="_blank" href="http://www.osti.gov/search">DOE Office of Scientific and Technical Information (OSTI.GOV)</a></p> <p>Butala, Megan M.; Perez, Minue A.; Arnon, Shiri</p> <p></p> <p>Transition <span class="hlt">metal</span> chalcogenides are of interest for energy applications, including energy generation in photoelectrochemical cells and as electrodes for next-generation electrochemical energy storage. Synthetic routes for such chalcogenides typically involve extended heating at elevated temperatures for multiple weeks. We demonstrate here the feasibility of rapidly preparing select <span class="hlt">sulfide</span> compounds in a matter of minutes, rather than weeks, using microwave-assisted heating in domestic microwaves. We report the preparations of phase pure FeS2, CoS2, and solid solutions thereof from the elements with only 40 min of heating. Conventional furnace and rapid microwave preparations of CuTi2S4 both result in a majority of themore » targeted phase, even with the significantly shorter heating time of 40 min for microwave methods relative to 12 days using a conventional furnace. The preparations we describe for these compounds can be extended to related structures and chemistries and thus enable rapid screening of the properties and performance of various compositions of interest for electronic, optical, and electrochemical applications.« less</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2010JOM....62k..41A','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2010JOM....62k..41A"><span>Alkaline <span class="hlt">sulfide</span> pretreatment of an antimonial refractory Au-Ag ore for improved cyanidation</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Alp, Ibrahim; Celep, Oktay; Deveci, Haci</p> <p>2010-11-01</p> <p>This paper presents the alkaline <span class="hlt">sulfide</span> pretreatment of an antimonial refractory gold and silver ore. In the ore, gold occurs mainly as gold-silver alloys and as associated with quartz and framboidal pyrite grains, and, to a small extent, as the inclusions within antimonial <span class="hlt">sulfides</span>. Silver is present extensively as antimonial <span class="hlt">sulfides</span> such as andorite. Alkaline <span class="hlt">sulfide</span> pretreatment was shown to allow the decomposition of the antimonial <span class="hlt">sulfide</span> minerals (up to 98% Sb removal) and to remarkably improve the amenability of gold (e.g., from <49% up to 83%) and silver (e.g., from <18% up to 90%) to subsequent cyanide leaching. An increase in reagent concentration (1-4 mol/L Na2S or NaOH) and temperature (20-80°C), and a decrease in particle size seem to produce an enhancing effect on <span class="hlt">metal</span> extraction. These findings suggest that alkaline <span class="hlt">sulfide</span> leaching can be suitably used as a chemical pretreatment method prior to the conventional cyanidation for antimonial refractory gold and silver ores.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/20130011092','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/20130011092"><span>FIB-TEM Investigations of Fe-NI-<span class="hlt">Sulfides</span> in the CI Chondrites Alais and Orgueil</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Berger, Eve L.; Lauretta, D. S.; Zega, T. J.; Keller, L. P.</p> <p>2013-01-01</p> <p>The CI chondrites are primitive meteorites with bulk compositions matching the solar photosphere for all but the lightest elements. They have been extensively aqueously altered, and are composed primarily of fine-grained phyllosilicate matrix material which is host to carbonates, sulfates, <span class="hlt">sulfides</span>, and minor amounts of olivine and pyroxene. The alteration, while extensive, is heterogeneous. For example, CI-chondrite cubanite and carbonate grains differ on mm to sub-mm scales, demonstrating multiple aqueous episodes. CI-chondrite variability is also evidenced by degree of brecciation, abundance and size of coarse-grained phyllosilicates, olivine and pyroxene abundance, as well as Ni-content and size of <span class="hlt">sulfide</span> grains. Our previous work revealed Orgueil <span class="hlt">sulfide</span> grains with variable Ni-contents, <span class="hlt">metal:S</span> ratios, crystal structures and textures. We continue to explore the variability of CI-chondrite pyrrhotite (Po, (FeNi)1-xS) and pentlandite (Pn, (Fe,Ni)9S8) grains. We investigate the microstructure of <span class="hlt">sulfides</span> within and among CI-chondrite meteorites in order to place constraints on the conditions under which they formed.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=1057951','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=1057951"><span>Microbiological Leaching of <span class="hlt">Metallic</span> <span class="hlt">Sulfides</span></span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Razzell, W. E.; Trussell, P. C.</p> <p>1963-01-01</p> <p>The percentage of chalcopyrite leached in percolators by Thiobacillus ferrooxidans was dependent on the surface area of the ore but not on the amount. Typical examples of ore leaching, which demonstrate the role of the bacteria, are presented. In stationary fermentations, changes in KH2PO4 concentration above or below 0.1% decreased copper leaching as did reduction in the MgSO4·7H2O and increase in the (NH4)2SO4 concentration. Bacterial leaching of chalcopyrite was more effective than nonbiological leaching with ferric sulfate; ferric sulfate appeared to retard biological leaching, but this effect was likely caused by formation of an insoluble copper-iron complex. Ferrous sulfate and sodium chloride singly accentuated both bacterial and nonbiological leaching of chalcocite but jointly depressed bacterial action. Sodium chloride appeared to block bacterial iron oxidation without interfering with <span class="hlt">sulfide</span> oxidation. Bacterial leaching of millerite, bornite, and chalcocite was greatest at pH 2.5. The economics of leaching a number of British Columbia ore bodies was discussed. PMID:16349627</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/servlets/purl/1215611','DOE-PATENT-XML'); return false;" href="https://www.osti.gov/servlets/purl/1215611"><span>Nano-structured noble <span class="hlt">metal</span> catalysts <span class="hlt">based</span> on hexametallate architecture for the reforming of hydrocarbon fuels</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Gardner, Todd H.</p> <p>2015-09-15</p> <p>Nano-structured noble <span class="hlt">metal</span> catalysts <span class="hlt">based</span> on hexametallate lattices, of a spinel block type, and which are resistant to carbon deposition and <span class="hlt">metal</span> <span class="hlt">sulfide</span> formation are provided. The catalysts are designed for the reforming of hydrocarbon fuels to synthesis gas. The hexametallate lattices are doped with noble <span class="hlt">metals</span> (Au, Pt, Rh, Ru) which are atomically dispersed as isolated sites throughout the lattice and take the place of hexametallate <span class="hlt">metal</span> ions such as Cr, Ga, In, and/or Nb. Mirror cations in the crystal lattice are selected from alkali <span class="hlt">metals</span>, alkaline earth <span class="hlt">metals</span>, and the lanthanide <span class="hlt">metals</span>, so as to reduce the acidity of the catalyst crystal lattice and enhance the desorption of carbon deposit forming moieties such as aromatics. The catalysts can be used at temperatures as high as 1000.degree. C. and pressures up to 30 atmospheres. A method for producing these catalysts and applications of their use also is provided.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/biblio/6207070-partitioning-palladium-iridium-platinum-gold-between-sulfide-liquid-basalt-melt-degree','SCIGOV-STC'); return false;" href="https://www.osti.gov/biblio/6207070-partitioning-palladium-iridium-platinum-gold-between-sulfide-liquid-basalt-melt-degree"><span>Partitioning of palladium, iridium, platinum, and gold between <span class="hlt">sulfide</span> liquid and basalt melt at 1,200 degree C</span></a></p> <p><a target="_blank" href="http://www.osti.gov/search">DOE Office of Scientific and Technical Information (OSTI.GOV)</a></p> <p>Stone, W.E.; Crocket, J.H.; Fleet, M.E.</p> <p>1990-08-01</p> <p>Iron-nickel monosulfide and basalt glass containing trace amounts of PGE equilibrated at 1,200{degree}C, and f{sub o{sub 2}} = 10{sup {minus}9.2} (close to the wustite-magnetite buffer) and f{sub s{sub 2}} = 10{sup {minus}0.9}, have been analyzed for noble <span class="hlt">metals</span> by radiochemical and instrumental neutron activation analysis. The average contents of PGE in coexisting Fe-Ni <span class="hlt">sulfide</span> and basalt glass, respectively, are Pd, 50 ppm and 0.5 ppb; Ir, 50 ppm and 0.5 ppb; Pt, 100 ppm and 10 ppb; and Au, 0.7 ppm and 0.8 ppb. The <span class="hlt">sulfide</span> liquid-silicate melt partition coefficients (D values) for the noble <span class="hlt">metals</span> are (9 {plus minus}more » 7) {times} 10{sup 4} for Pd, (1 {plus minus} 0.7) {times} 10{sup 5} for Ir, (9 {plus minus} 6) {times} 10{sup 3} Pt, and (1 {plus minus} 0.9) {times} 10{sup 3} for Au. The noble <span class="hlt">metals</span> are strongly partitioned into <span class="hlt">sulfide</span> liquid, but the affinity of Pd and Ir for <span class="hlt">sulfide</span> liquid is about 50 times greater than that of Pt and about 500 times greater than that of Au. The D values indicate that equilibrium partitioning between immiscible <span class="hlt">sulfide</span> liquid and basalt magma would result in fractionation of the noble <span class="hlt">metals</span>, which differs significantly from that generally observed in nature.« less</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/servlets/purl/865685','DOE-PATENT-XML'); return false;" href="https://www.osti.gov/servlets/purl/865685"><span><span class="hlt">Sulfide</span> chemiluminescence detection</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Spurlin, Stanford R.; Yeung, Edward S.</p> <p>1985-01-01</p> <p>A method of chemiluminescently determining a <span class="hlt">sulfide</span> which is either hydrogen <span class="hlt">sulfide</span> or methyl mercaptan by reacting the <span class="hlt">sulfide</span> with chlorine dioxide at low pressure and under conditions which allow a longer reaction time in emission of a single photon for every two <span class="hlt">sulfide</span> containing species, and thereafter, chemiluminescently detecting and determining the <span class="hlt">sulfide</span>. The invention also relates not only to the detection method, but the novel chemical reaction and a specifically designed chemiluminescence detection cell for the reaction.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2018JHEP...02..171C','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2018JHEP...02..171C"><span><span class="hlt">BMS</span> supertranslation symmetry implies Faddeev-Kulish amplitudes</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Choi, Sangmin; Akhoury, Ratindranath</p> <p>2018-02-01</p> <p>We show explicitly that, among the scattering amplitudes constructed from eigenstates of the <span class="hlt">BMS</span> supertranslation charge, the ones that conserve this charge, are equal to those constructed from Faddeev-Kulish states. Thus, Faddeev-Kulish states naturally arise as a consequence of the asymptotic symmetries of perturbative gravity and all charge conserving amplitudes are infrared finite. In the process we show an important feature of the Faddeev-Kulish clouds dressing the external hard particles: these clouds can be moved from the incoming states to the outgoing ones, and vice-versa, without changing the infrared finiteness properties of S matrix elements. We also apply our discussion to the problem of the decoherence of momentum configurations of hard particles due to soft boson effects.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/biblio/7148124','DOE-PATENT-XML'); return false;" href="https://www.osti.gov/biblio/7148124"><span><span class="hlt">Sulfide</span> chemiluminescence detection</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Spurlin, S.R.; Yeung, E.S.</p> <p>1985-11-26</p> <p>A method is described for chemiluminescently determining a <span class="hlt">sulfide</span> which is either hydrogen <span class="hlt">sulfide</span> or methyl mercaptan by reacting the <span class="hlt">sulfide</span> with chlorine dioxide at low pressure and under conditions which allow a longer reaction time in emission of a single photon for every two <span class="hlt">sulfide</span> containing species, and thereafter, chemiluminescently detecting and determining the <span class="hlt">sulfide</span>. The invention also relates not only to the detection method, but the novel chemical reaction and a specifically designed chemiluminescence detection cell for the reaction. 4 figs.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/servlets/purl/869082','DOE-PATENT-XML'); return false;" href="https://www.osti.gov/servlets/purl/869082"><span>High temperature regenerable hydrogen <span class="hlt">sulfide</span> removal agents</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Copeland, Robert J.</p> <p>1993-01-01</p> <p>A system for high temperature desulfurization of coal-derived gases using regenerable sorbents. One sorbent is stannic oxide (tin oxide, SnO.sub.2), the other sorbent is a <span class="hlt">metal</span> oxide or mixed <span class="hlt">metal</span> oxide such as zinc ferrite (ZnFe.sub.2 O.sub.4). Certain otherwise undesirable by-products, including hydrogen <span class="hlt">sulfide</span> (H.sub.2 S) and sulfur dioxide (SO.sub.2) are reused by the system, and elemental sulfur is produced in the regeneration reaction. A system for refabricating the sorbent pellets is also described.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/17560565','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/17560565"><span>Zn mobility and geochemistry in surface <span class="hlt">sulfide</span> mining soils from SE Spain.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Garcia, G; Peñas, J M; Manteca, J I</p> <p>2008-03-01</p> <p>The extraction of <span class="hlt">metallic</span> minerals and the mineral dressing operations in concentrators produced a high impact in soils and sediments. Heavy <span class="hlt">metals</span> in soils constitute a high risk of pollution, not only for mining areas, but also for agriculture and villages placed in subsidiary areas. This research has been focused on the assessment of the real environmental and health hazards of Zn in relation to geochemistry and <span class="hlt">metal</span> mobility in surface soils from a mining area in SE Spain, under semiarid weather conditions. Mineralogy of the studied soils revealed major presence of quartz, but also of other silicates, sulfates, carbonates, and <span class="hlt">sulfides</span>. Regarding Zn minerals, the presence of sphalerite as the main Zn <span class="hlt">sulfide</span>, and of goslarite as Zn sulfate, and of smithsonite as Zn carbonate should be highlighted. Soil pH ranged between 4.4 and 4.9 and the electrical conductivity between 55 and 85 microS/cm. By using the sequential extraction procedure, the achieved results show that zinc is not only mainly associated to primary but also to secondary <span class="hlt">sulfides</span>. Total concentration of the non-available fractions rises up to 98.45% of total Zn in the studied soils. On the other hand, available Zn fraction did not exceed more than 1.55% in percentage and less than 2000 ppm in absolute terms, and when referred to more easily available fraction (water-soluble and exchangeable fractions), these values are not more than 0.44% and then 800 ppm. Therefore, although there is a significant pollution level in this area, immediate hazard for the environment can be assessed as moderate. Finally it should be highlighted that these surface soils have undergone concentration processes of sphalerite, whose mechanisms should be related to the ascending flow of capillary water and the dragging of sphalerite crystals and Zn salts by electrokinetic and colloidal processes These processes seem to occur <span class="hlt">based</span> on environmental pollution by wind and water erosion, and therefore directly associated to</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/28742141','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/28742141"><span>Bruton's tyrosine kinase inhibitor <span class="hlt">BMS</span>-986142 in experimental models of rheumatoid arthritis enhances efficacy of agents representing clinical standard-of-care.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Gillooly, Kathleen M; Pulicicchio, Claudine; Pattoli, Mark A; Cheng, Lihong; Skala, Stacey; Heimrich, Elizabeth M; McIntyre, Kim W; Taylor, Tracy L; Kukral, Daniel W; Dudhgaonkar, Shailesh; Nagar, Jignesh; Banas, Dana; Watterson, Scott H; Tino, Joseph A; Fura, Aberra; Burke, James R</p> <p>2017-01-01</p> <p>Bruton's tyrosine kinase (BTK) regulates critical signal transduction pathways involved in the pathobiology of rheumatoid arthritis (RA) and other autoimmune disorders. <span class="hlt">BMS</span>-986142 is a potent and highly selective reversible small molecule inhibitor of BTK currently being investigated in clinical trials for the treatment of both RA and primary Sjögren's syndrome. In the present report, we detail the in vitro and in vivo pharmacology of <span class="hlt">BMS</span>-986142 and show this agent provides potent and selective inhibition of BTK (IC50 = 0.5 nM), blocks antigen receptor-dependent signaling and functional endpoints (cytokine production, co-stimulatory molecule expression, and proliferation) in human B cells (IC50 ≤ 5 nM), inhibits Fcγ receptor-dependent cytokine production from peripheral blood mononuclear cells, and blocks RANK-L-induced osteoclastogenesis. Through the benefits of impacting these important drivers of autoimmunity, <span class="hlt">BMS</span>-986142 demonstrated robust efficacy in murine models of rheumatoid arthritis (RA), including collagen-induced arthritis (CIA) and collagen antibody-induced arthritis (CAIA). In both models, robust efficacy was observed without continuous, complete inhibition of BTK. When a suboptimal dose of <span class="hlt">BMS</span>-986142 was combined with other agents representing the current standard of care for RA (e.g., methotrexate, the TNFα antagonist etanercept, or the murine form of CTLA4-Ig) in the CIA model, improved efficacy compared to either agent alone was observed. The results suggest <span class="hlt">BMS</span>-986142 represents a potential therapeutic for clinical investigation in RA, as monotherapy or co-administered with agents with complementary mechanisms of action.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/24355850','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/24355850"><span>Hydrogen <span class="hlt">sulfide</span> removal from sediment and water in box culverts/storm drains by iron-<span class="hlt">based</span> granules.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Sun, J L; Shang, C; Kikkert, G A</p> <p>2013-01-01</p> <p>A renewable granular iron-<span class="hlt">based</span> technology for hydrogen <span class="hlt">sulfide</span> removal from sediment and water in box culverts and storm drains is discussed. Iron granules, including granular ferric hydroxide (GFH), granular ferric oxide (GFO) and rusted waste iron crusts (RWIC) embedded in the sediment phase removed aqueous hydrogen <span class="hlt">sulfide</span> formed from sedimentary biological sulfate reduction. The exhausted iron granules were exposed to dissolved oxygen and this regeneration process recovered the <span class="hlt">sulfide</span> removal capacities of the granules. The recovery is likely attributable to the oxidation of the ferrous iron precipitates film and the formation of new reactive ferric iron surface sites on the iron granules and sand particles. GFH and RWIC showed larger <span class="hlt">sulfide</span> removal capacities in the sediment phase than GFO, likely due to the less ordered crystal structures on their surfaces. This study demonstrates that the iron granules are able to remove hydrogen <span class="hlt">sulfide</span> from sediment and water in box culverts and storm drains and they have the potential to be regenerated and reused by contacting with dissolved oxygen.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/26676800','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/26676800"><span>2D Transition-<span class="hlt">Metal-Dichalcogenide-Nanosheet-Based</span> Composites for Photocatalytic and Electrocatalytic Hydrogen Evolution Reactions.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Lu, Qipeng; Yu, Yifu; Ma, Qinglang; Chen, Bo; Zhang, Hua</p> <p>2016-03-09</p> <p>Hydrogen (H2) is one of the most important clean and renewable energy sources for future energy sustainability. Nowadays, photocatalytic and electrocatalytic hydrogen evolution reactions (HERs) from water splitting are considered as two of the most efficient methods to convert sustainable energy to the clean energy carrier, H2. Catalysts <span class="hlt">based</span> on transition <span class="hlt">metal</span> dichalcogenides (TMDs) are recognized as greatly promising substitutes for noble-<span class="hlt">metal-based</span> catalysts for HER. The photocatalytic and electrocatalytic activities of TMD nanosheets for the HER can be further improved after hybridization with many kinds of nanomaterials, such as <span class="hlt">metals</span>, oxides, <span class="hlt">sulfides</span>, and carbon materials, through different methods including the in situ reduction method, the hot-injection method, the heating-up method, the hydro(solvo)thermal method, chemical vapor deposition (CVD), and thermal annealing. Here, recent progress in photocatalytic and electrocatalytic HERs using 2D TMD-<span class="hlt">based</span> composites as catalysts is discussed. © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2018ApSS..435.1011K','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2018ApSS..435.1011K"><span><span class="hlt">Sulfidation</span> behavior and mechanism of zinc silicate roasted with pyrite</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Ke, Yong; Peng, Ning; Xue, Ke; Min, Xiaobo; Chai, Liyuan; Pan, Qinglin; Liang, Yanjie; Xiao, Ruiyang; Wang, Yunyan; Tang, Chongjian; Liu, Hui</p> <p>2018-03-01</p> <p><span class="hlt">Sulfidation</span> roasting followed by flotation is widely known as a possible generic technology for enriching valuable <span class="hlt">metals</span> in low-grade Zn-Pb oxide ores. Zn2SiO4 is the primary Zn phase in willemite. Zn4Si2O7(OH)2(H2O), the main Zn phase in hemimorphite, transforms into Zn2SiO4 at temperatures above 600 °C. To enrich the Zn in willemite and hemimorphite, the Zn species should first be converted to ZnS. Therefore, a thorough understanding of the <span class="hlt">sulfidation</span> reaction of Zn2SiO4 during roasting with pyrite is of vital important. In this study, the <span class="hlt">sulfidation</span> behavior and reaction mechanisms of a Zn2SiO4-pyrite roasting system were determined using HSC 5.0 software, TG-FTIR spectroscopy, XRD, XPS and SEM-EDS. The results indicate that the <span class="hlt">sulfidation</span> process can be divided into three steps: the decomposition of pyrite and formation of a sulfur-rich environment, the sulfur-induced migration of O2- and transformation of sulfur vapor, and the <span class="hlt">sulfidation</span> reaction via oxygen-sulfur exchange. During the <span class="hlt">sulfidation</span> roasting process, pyrite was converted to loose and porous Fe3O4, whereas Zn2SiO4 was transformed into ZnS and SiO2 in situ. These findings provide theoretical support for controlling the <span class="hlt">sulfidation</span> roasting process of willemite and hemimorphite.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/12810318','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/12810318"><span>Rapid oxidation of <span class="hlt">sulfide</span> mine tailings by reaction with potassium ferrate.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Murshed, Mohamed; Rockstraw, David A; Hanson, Adrian T; Johnson, Michael</p> <p>2003-01-01</p> <p>The chemistry of <span class="hlt">sulfide</span> mine tailings treated with potassium ferrate (K2FeO4) in aqueous slurry has been investigated. The reaction system is believed to parallel a geochemical oxidation in which ferrate ion replaces oxygen. This chemical system utilized in a pipeline (as a plug flow reactor) may have application eliminating the potential for tailings to leach acid while recovering the <span class="hlt">metal</span> from the tailings. Elemental analyses were performed using an ICP spectrometer for the aqueous phase extract of the treated tailings; and an SEM-EDX for the tailing solids. Solids were analyzed before and after treatments were applied. ICP shows that as the mass ratio of ferrate ion to tailings increases, the concentration of <span class="hlt">metals</span> in the extract solution increases; while EDX indicates a corresponding decrease in sulfur content of the tailing solids. The extraction of <span class="hlt">metal</span> and reduction in <span class="hlt">sulfide</span> content is significant. The kinetic timeframe is on the order of minutes.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/26353475','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/26353475"><span>Antineoplastic Activity Comparison of Bovine Serum Albumin--Conjugated <span class="hlt">Sulfides</span> Semiconductor Nanomaterials.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Wang, Hua-Jie; Huang, Jing-Chun; Wu, Sha-Sha; Wang, Cai-Feng; Yu, Xue-Hong; Cao, Ying</p> <p>2015-04-01</p> <p>Although tumor is one of the most frequently occurring diseases and a leading cause of death, nanotechnology, one of the frontier sciences, is exhibiting its great potential to tumor treatments. The aim of this study was to design a facile and environmentally-friendly method to prepare bovine serum albumin-conjugated heavy <span class="hlt">metal</span> <span class="hlt">sulfides</span> nano-materials, including Ag2S, PbS and CdS. Here, bovine serum albumin was introduced in order to direct the synthesis of nano-materials by using its template effect and supply more sites for further modification in future. The crystal structure and morphology were analyzed by XRD and TEM, respectively. Additionally, the antineoplastic activity of nano-materials was compared by cell viability analysis, optical and electron microscopy observation after exposure of the human hepatoma cell line. The results showed that the inhibition effect of heavy <span class="hlt">metal</span> <span class="hlt">sulfides</span> on tumor cells was in the order of nano-PbS > bulk CdS > nano-Ag2S > nano-CdS > bulk PbS > bulk Ag2S. It could be concluded that heavy <span class="hlt">metal</span> <span class="hlt">sulfides</span> had significantly negative impact on human hepatoma cells growth but it could not be obviously generalized that nano-particles were always more effective to kill tumor cells than bulk materials. The size and surface reactivity might be the important factors causing the difference.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/1994GeCoA..58..811B','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/1994GeCoA..58..811B"><span>The partitioning of Fe, Ni, Cu, Pt, and Au between <span class="hlt">sulfide</span>, <span class="hlt">metal</span>, and fluid phases: A pilot study</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Ballhaus, C.; Ryan, C. G.; Mernagh, T. P.; Green, D. H.</p> <p>1994-01-01</p> <p>This paper describes new experimental and analytical techniques to study element partitioning behavior between crystalline material and a late- to post-magmatic fluid phase. Samples of the fluid phase are isolated at experimental run conditions as synthetic fluid in quartz. Individual fluid inclusions are later analyzed for dissolved <span class="hlt">metals</span> using Proton Induced X-ray Emission (PIXE). Back reactions between fluid and solid phases during quenching are prevented because the fluid is isolated at the experimental pressure, temperature ( P, T) conditions before quenching occurs. The technique is applied to study the partitioning of chalcophile elements (Fe, Ni, Cu, Pt and Au) between <span class="hlt">sulfide</span> phases, <span class="hlt">metal</span> alloys and supercritical SiO 2-NaCl-saturated H2O ± CH4- CO2- H2S fluids. Synthetic Ni-Cu-rich monosulfide solid solution (mss) doped with PtS or Au is packed in a quartz capsule and, together with a hydrogen buffer capsule and compounds to generate a fluid phase, welded shut in an outer Pt or Au <span class="hlt">metal</span> capsule. The fluid phase is generated by combustion and reaction of various C-H-O fluid components during heating. Depending on capsule material and sample composition, the run products consist of platiniferous or auriferous mss, Pt-Fe, or ( Au, Cu) alloy phases, PtS, Fe 3O 4, sometimes a Cu-rich <span class="hlt">sulfide</span> melt, and a fluid phase. Samples of the fluid are trapped in the walls of the quartz sample capsule as polyphase fluid inclusions. All phases are now available for analysis: fluid speciation is analyzed by piercing the outer <span class="hlt">metal</span> capsule under vacuum and feeding the released fluid into a mass spectrometer. Phases and components within fluid inclusions are identified with Raman spectroscopy. Platinum and gold in solid solution in mss are determined with a CAMECA SX50 electron microanalyser. <span class="hlt">Metal</span> contents trapped in selected fluid inclusions are determined quantitatively by in situ analysis with a proton microprobe using PIXE and a correction procedure specifically</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/28510305','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/28510305"><span>Reactive Precipitation of Anhydrous Alkali <span class="hlt">Sulfide</span> Nanocrystals with Concomitant Abatement of Hydrogen <span class="hlt">Sulfide</span> and Cogeneration of Hydrogen.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Li, Xuemin; Zhao, Yangzhi; Brennan, Alice; McCeig, Miranda; Wolden, Colin A; Yang, Yongan</p> <p>2017-07-21</p> <p>Anhydrous alkali <span class="hlt">sulfide</span> (M 2 S, M=Li or Na) nanocrystals (NCs) are important materials central to the development of next generation cathodes and solid-state electrolytes for advanced batteries, but not commercially available at present. This work reports an innovative method to directly synthesize M 2 S NCs through alcohol-mediated reactions between alkali <span class="hlt">metals</span> and hydrogen <span class="hlt">sulfide</span> (H 2 S). In the first step, the alkali <span class="hlt">metal</span> is complexed with alcohol in solution, forming <span class="hlt">metal</span> alkoxide (ROM) and releasing hydrogen (H 2 ). Next, H 2 S is bubbled through the ROM solution, where both chemicals are completely consumed to produce phase-pure M 2 S NC precipitates and regenerate alcohol that can be recycled. The M 2 S NCs morphology may be tuned through the choice of the alcohol and solvent. Both synthetic steps are thermodynamically favorable (ΔG m o <-100 kJ mol -1 ), proceeding rapidly to completion at ambient temperature with almost 100 % atom efficiency. The net result, H 2 S+2 m→M 2 S+H 2 , makes good use of a hazardous chemical (H 2 S) and delivers two value-added products that naturally phase separate for easy recovery. This scalable approach provides an energy-efficient and environmentally benign solution to the production of nanostructured materials required in emerging battery technologies. © 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/servlets/purl/1028651','SCIGOV-STC'); return false;" href="https://www.osti.gov/servlets/purl/1028651"><span>Theoretical Studies on Heavy <span class="hlt">Metal</span> <span class="hlt">Sulfides</span> in Solution</span></a></p> <p><a target="_blank" href="http://www.osti.gov/search">DOE Office of Scientific and Technical Information (OSTI.GOV)</a></p> <p>Tossell, John A.</p> <p>2007-10-31</p> <p>'Calculating the stabilities, Raman and UV spectra and acidities of As <span class="hlt">sulfides</span> in aqueous solution', J. A. Tossell, M. D. Zimmermann and G. R. Helz. Some of the Raman spectra obtained by reacting aqueous As(OH)3 with aqueous bisulfide are shown, taken from Wood, et al. (2002). To interpret these spectra we have carried out an extensive series of calculations, detailed for the case of AsS(SH){sub 2}{sup -} in Table 1 below. By employing state of the art quantum chemical techniques to determine gas-phase harmonic and anharmonic frequencies and solution phase corrections we can accurately match features in the experimental spectrummore » shown in the top figure. The AsS(SH){sub 2}{sup -}...22 H{sub 2}O nanocluster employed is shown in the lower figure. For this species we have calculated the equilibrium structure and the harmonic vibrational spectrum at the CBSB7 B3LYP level. For the free solute species AsS(SH){sub 2}{sup -} we have carried out a whole series of calculations, evaluating harmonic and anharmonic vibrational frequencies at a number of different quantum mechanical levels. In the spectra below, Fig. 3 and Fig. 5 from Wood, et al. (2002), the features around 700-800 cm{sup -1} are attributed to As-O stretches and those around 350-450 cm{sup -1} to As-S stretches. In the nanocluster an isolated vibrational feature is observed at 425 cm{sup -1}, an As=S stretch, close to the value (415 cm{sup -1}) determined by Wood, et al. (2002). Analysis of the calculated frequencies for AsS(SH){sub 2}{sup -} within a polarizable continuum model yields a similar result. Taking the highest level harmonic results, obtained from a CCSD calculation, and adding anharmonic and PCM corrections at the B3LYP level (designated (3) + (5) - (1) in Table 1) gives a frequency for the intense high frequency As=S stretch within 15 cm{sup -1} of experiment. Although there is still interesting work to be done on the stabilities and the Raman and UV spectra of As <span class="hlt">sulfides</span>, most of the</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_13");'>13</a></li> <li><a href="#" onclick='return showDiv("page_14");'>14</a></li> <li class="active"><span>15</span></li> <li><a href="#" onclick='return showDiv("page_16");'>16</a></li> <li><a href="#" onclick='return showDiv("page_17");'>17</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_15 --> <div id="page_16" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_14");'>14</a></li> <li><a href="#" onclick='return showDiv("page_15");'>15</a></li> <li class="active"><span>16</span></li> <li><a href="#" onclick='return showDiv("page_17");'>17</a></li> <li><a href="#" onclick='return showDiv("page_18");'>18</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="301"> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/biblio/1370406-analytical-modeling-localized-surface-plasmon-resonance-heterostructure-copper-sulfide-nanocrystals','SCIGOV-STC'); return false;" href="https://www.osti.gov/biblio/1370406-analytical-modeling-localized-surface-plasmon-resonance-heterostructure-copper-sulfide-nanocrystals"><span>Analytical modeling of localized surface plasmon resonance in heterostructure copper <span class="hlt">sulfide</span> nanocrystals</span></a></p> <p><a target="_blank" href="http://www.osti.gov/search">DOE Office of Scientific and Technical Information (OSTI.GOV)</a></p> <p>Caldwell, Andrew H.; Ha, Don-Hyung; Ding, Xiaoyue</p> <p>2014-10-28</p> <p>Localized surface plasmon resonance (LSPR) in semiconductor nanocrystals is a relatively new field of investigation that promises greater tunability of plasmonic properties compared to <span class="hlt">metal</span> nanoparticles. A novel process by which the LSPR in semiconductor nanocrystals can be altered is through heterostructure formation arising from solution-<span class="hlt">based</span> cation exchange. Herein, we describe the development of an analytical model of LSPR in heterostructure copper <span class="hlt">sulfide</span>-zinc <span class="hlt">sulfide</span> nanocrystals synthesized via a cation exchange reaction between copper <span class="hlt">sulfide</span> (Cu 1.81S) nanocrystals and Zn ions. The cation exchange reaction produces dual-interface, heterostructure nanocrystals in which the geometry of the copper <span class="hlt">sulfide</span> phase can be tunedmore » from a sphere to a thin disk separating symmetrically-grown <span class="hlt">sulfide</span> (ZnS) grains. Drude model electronic conduction and Mie-Gans theory are applied to describe how the LSPR wavelength changes during cation exchange, taking into account the morphology evolution and changes to the local permittivity. The results of the modeling indicate that the presence of the ZnS grains has a significant effect on the out-of-plane LSPR mode. By comparing the results of the model to previous studies on solid-solid phase transformations of copper <span class="hlt">sulfide</span> in these nanocrystals during cation exchange, we show that the carrier concentration is independent of the copper vacancy concentration dictated by its atomic phase. The evolution of the effective carrier concentration calculated from the model suggests that the out-of-plane resonance mode is dominant. The classical model was compared to a simplified quantum mechanical model which suggested that quantum mechanical effects become significant when the characteristic size is less than ~8 nm. Overall, we find that the analytical models are not accurate for these heterostructured semiconductor nanocrystals, indicating the need for new model development for this emerging field.« less</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2014JChPh.141p4125C','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2014JChPh.141p4125C"><span>Analytical modeling of localized surface plasmon resonance in heterostructure copper <span class="hlt">sulfide</span> nanocrystals</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Caldwell, Andrew H.; Ha, Don-Hyung; Ding, Xiaoyue; Robinson, Richard D.</p> <p>2014-10-01</p> <p>Localized surface plasmon resonance (LSPR) in semiconductor nanocrystals is a relatively new field of investigation that promises greater tunability of plasmonic properties compared to <span class="hlt">metal</span> nanoparticles. A novel process by which the LSPR in semiconductor nanocrystals can be altered is through heterostructure formation arising from solution-<span class="hlt">based</span> cation exchange. Herein, we describe the development of an analytical model of LSPR in heterostructure copper <span class="hlt">sulfide</span>-zinc <span class="hlt">sulfide</span> nanocrystals synthesized via a cation exchange reaction between copper <span class="hlt">sulfide</span> (Cu1.81S) nanocrystals and Zn ions. The cation exchange reaction produces dual-interface, heterostructure nanocrystals in which the geometry of the copper <span class="hlt">sulfide</span> phase can be tuned from a sphere to a thin disk separating symmetrically-grown <span class="hlt">sulfide</span> (ZnS) grains. Drude model electronic conduction and Mie-Gans theory are applied to describe how the LSPR wavelength changes during cation exchange, taking into account the morphology evolution and changes to the local permittivity. The results of the modeling indicate that the presence of the ZnS grains has a significant effect on the out-of-plane LSPR mode. By comparing the results of the model to previous studies on solid-solid phase transformations of copper <span class="hlt">sulfide</span> in these nanocrystals during cation exchange, we show that the carrier concentration is independent of the copper vacancy concentration dictated by its atomic phase. The evolution of the effective carrier concentration calculated from the model suggests that the out-of-plane resonance mode is dominant. The classical model was compared to a simplified quantum mechanical model which suggested that quantum mechanical effects become significant when the characteristic size is less than ˜8 nm. Overall, we find that the analytical models are not accurate for these heterostructured semiconductor nanocrystals, indicating the need for new model development for this emerging field.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/biblio/22311329-analytical-modeling-localized-surface-plasmon-resonance-heterostructure-copper-sulfide-nanocrystals','SCIGOV-STC'); return false;" href="https://www.osti.gov/biblio/22311329-analytical-modeling-localized-surface-plasmon-resonance-heterostructure-copper-sulfide-nanocrystals"><span>Analytical modeling of localized surface plasmon resonance in heterostructure copper <span class="hlt">sulfide</span> nanocrystals</span></a></p> <p><a target="_blank" href="http://www.osti.gov/search">DOE Office of Scientific and Technical Information (OSTI.GOV)</a></p> <p>Caldwell, Andrew H.; Ha, Don-Hyung; Robinson, Richard D., E-mail: rdr82@cornell.edu</p> <p>2014-10-28</p> <p>Localized surface plasmon resonance (LSPR) in semiconductor nanocrystals is a relatively new field of investigation that promises greater tunability of plasmonic properties compared to <span class="hlt">metal</span> nanoparticles. A novel process by which the LSPR in semiconductor nanocrystals can be altered is through heterostructure formation arising from solution-<span class="hlt">based</span> cation exchange. Herein, we describe the development of an analytical model of LSPR in heterostructure copper <span class="hlt">sulfide</span>-zinc <span class="hlt">sulfide</span> nanocrystals synthesized via a cation exchange reaction between copper <span class="hlt">sulfide</span> (Cu{sub 1.81}S) nanocrystals and Zn ions. The cation exchange reaction produces dual-interface, heterostructure nanocrystals in which the geometry of the copper <span class="hlt">sulfide</span> phase can be tunedmore » from a sphere to a thin disk separating symmetrically-grown <span class="hlt">sulfide</span> (ZnS) grains. Drude model electronic conduction and Mie-Gans theory are applied to describe how the LSPR wavelength changes during cation exchange, taking into account the morphology evolution and changes to the local permittivity. The results of the modeling indicate that the presence of the ZnS grains has a significant effect on the out-of-plane LSPR mode. By comparing the results of the model to previous studies on solid-solid phase transformations of copper <span class="hlt">sulfide</span> in these nanocrystals during cation exchange, we show that the carrier concentration is independent of the copper vacancy concentration dictated by its atomic phase. The evolution of the effective carrier concentration calculated from the model suggests that the out-of-plane resonance mode is dominant. The classical model was compared to a simplified quantum mechanical model which suggested that quantum mechanical effects become significant when the characteristic size is less than ∼8 nm. Overall, we find that the analytical models are not accurate for these heterostructured semiconductor nanocrystals, indicating the need for new model development for this emerging field.« less</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/29542911','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/29542911"><span>Solid-Solution Anion-Enhanced Electrochemical Performances of <span class="hlt">Metal</span> <span class="hlt">Sulfides</span>/Selenides for Sodium-Ion Capacitors: The Case of FeS2- xSe x.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Long, Yaqiong; Yang, Jing; Gao, Xin; Xu, Xuena; Fan, Weiliu; Yang, Jian; Hou, Shifeng; Qian, Yitai</p> <p>2018-04-04</p> <p>Transition-<span class="hlt">metal</span> <span class="hlt">sulfides</span>/selenides are explored as advanced electrode materials for nonaqueous sodium-ion capacitors, using FeS 2- x Se x as an example. A solid solution of S/Se in FeS 2- x Se x allows it to combine the high capacity of FeS 2 and the good diffusion kinetics of FeSe 2 together, thereby exhibiting excellent cycle stability (∼220 mA h g -1 after 6000 cycles at 2 A g -1 ) and superior rate capability (∼210 mA h g -1 at 40 A g -1 ) within 0.8-3.0 V. These results are much better than those of FeS 2 and FeSe 2 , confirming the advantages of S/Se solid solution, as supported by EIS spectra, DFT calculations, and electronic conductivity. As FeS 2- x Se x is paired with the activated carbon (AC) as Na-ion capacitors, this device is also better than sodium-ion batteries of FeS 2- x Se x //Na 3 V 2 (PO 4 ) 3 and sodium-ion capacitors of <span class="hlt">metal</span> oxides//AC, particularly at high rates. These results open a new door for the applications of <span class="hlt">sulfides</span>/selenides in another device of electrochemical energy storage.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2017JOUC...16.1043W','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2017JOUC...16.1043W"><span>Geochemical features of <span class="hlt">sulfides</span> from the Deyin-1 hydrothermal field at the southern Mid-Atlantic Ridge near 15°S</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Wang, Shujie; Li, Huaiming; Zhai, Shikui; Yu, Zenghui; Cai, Zongwei</p> <p>2017-12-01</p> <p>In this study, geochemical compositions of elements in <span class="hlt">sulfide</span> samples collected from the Deyin-1 hydrothermal field near the 15°S southern Mid-Atlantic Ridge (SMAR) were analyzed by the X-ray fluorescence spectrometry (XRF) and inductively coupled plasma mass spectrometry (ICP-MS) to examine the enrichment regulations of ore-forming elements and hydrothermal mineralization. These <span class="hlt">sulfide</span> precipitates can be classified macroscopically into three types: Fe-rich <span class="hlt">sulfide</span>, Fe-Cu-rich <span class="hlt">sulfide</span> and Fe-Zn-rich <span class="hlt">sulfide</span>, and are characterized by the enrichment of <span class="hlt">base</span> <span class="hlt">metal</span> elements along with a sequence of Fe>Zn>Cu. Compared with <span class="hlt">sulfides</span> from other hydrothermal fields on MAR, Zn concentrations of <span class="hlt">sulfides</span> in the research area are significantly high, while Cu concentrations are relatively low. For all major, trace or rare-earth elements (REE), their concentrations and related characteristic parameters exhibit significant variations (up to one or two orders of magnitude), which indicates the <span class="hlt">sulfides</span> from different hydrothermal vents or even a same station were formed at different stages of hydrothermal mineralization, and suggests the variations of chemical compositions of the hydrothermal fluid with respect to time. The hydrothermal temperatures of <span class="hlt">sulfides</span> precipitation decreased gradually from station TVG10 (st.TVG10) to st.TVG12, and to st.TVG11, indicating that the precipitation of hydrothermal <span class="hlt">sulfides</span> is subjected to conditions changed from high temperature to low temperature, and that the hydrothermal activity of study area was at the late stage of a general trend of evolution from strong to weak. The abnormally low concentrations of REE in <span class="hlt">sulfides</span> and their similar chondrite-normalized REE patterns show that REEs in all <span class="hlt">sulfides</span> were derived from a same source, but underwent different processes of migration or enrichment, or <span class="hlt">sulfides</span> were formed at different stages of hydrothermal mineralization. The <span class="hlt">sulfides</span> collected from the active hydrothermal vent were</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/15756013','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/15756013"><span>A phase I trial of the novel farnesyl protein transferase inhibitor, <span class="hlt">BMS</span>-214662, in combination with paclitaxel and carboplatin in patients with advanced cancer.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Dy, Grace K; Bruzek, Laura M; Croghan, Gary A; Mandrekar, Sumithra; Erlichman, Charles; Peethambaram, Prema; Pitot, Henry C; Hanson, Lorelei J; Reid, Joel M; Furth, Alfred; Cheng, Shinta; Martell, Robert E; Kaufmann, Scott H; Adjei, Alex A</p> <p>2005-03-01</p> <p>This phase I study was conducted to determine the toxicities, pharmacokinetics, and pharmacodynamics of <span class="hlt">BMS</span>-214662, a farnesyl transferase inhibitor, in combination with paclitaxel and carboplatin, in patients with advanced solid tumors. Patients with solid tumors received one of six escalating dose levels of <span class="hlt">BMS</span>-214662 infused over 1 hour given following paclitaxel and carboplatin on the first day of a 21-day cycle. Toxicities were graded by the National Cancer Institute common toxicity criteria and recorded as maximum grade per patient for each treatment cycle. Inhibition of farnesyl transferase activity in peripheral blood mononuclear cells (PBMCs) was evaluated. Accumulation of unfarnesylated HDJ-2 in PBMCs of patients was evaluated as a marker of farnesyl transferase inhibition by <span class="hlt">BMS</span>-214662. Thirty patients received 141 cycles of treatment through six dose levels. Dose-limiting toxicities were neutropenia, thrombocytopenia, nausea, and vomiting. There was no pharmacokinetic interaction between <span class="hlt">BMS</span>-214662 and paclitaxel. The maximum tolerated dose was established as <span class="hlt">BMS</span>-214662 (160 mg/m(2)), paclitaxel (225 mg/m(2)) and carboplatin (area under the curve = 6 on day 1), every 21 days. Inhibition of HDJ-2 farnesylation in PBMCs of patients was shown. One measurable partial response was observed in a patient with taxane-resistant esophageal cancer. There was partial regression of evaluable disease in two other patients (endometrial and ovarian cancer). Stable disease (> 4 cycles) occurred in eight other patients. The combination of <span class="hlt">BMS</span>-214662 with paclitaxel and carboplatin was well tolerated, with broad activity in solid tumors. There was no correlation between dose level and accumulation of unfarnesylated HDJ-2 in PBMCs nor tumor response.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/28600164','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/28600164"><span>Mercury <span class="hlt">based</span> drug in ancient India: The red <span class="hlt">sulfide</span> of mercury in nanoscale.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Mukhi, Priyabrata; Mohapatra, Swapna Sarita; Bhattacharjee, M; Ray, K K; Muraleedharan, T S; Arun, A; Sathyavathi, R; Juluri, R R; Satyam, P V; Panda, Alok K; Biswas, Ashis; Nayak, S; Bojja, Sreedhar; Pratihar, S; Roy, Sujit</p> <p></p> <p>Mercury is one of the elements which had attracted the attention of the chemists and physicians of ancient India and China. Among the various <span class="hlt">metal</span> <span class="hlt">based</span> drugs which utilize mercury, we became interested in the red <span class="hlt">sulfide</span> of mercury which is known in ancient Indian literature as rasasindur (alias rasasindura, rasasindoor, rasasinduram, sindur, or sindoor) and is used extensively in various ailments and diseases. Following various physico-chemical characterizations it is concluded that rasasindur is chemically pure α-HgS with Hg:S ratio as 1:1. Analysis of rasasindur vide Transmission Electron Microscopy (TEM) showed that the particles are in nanoscale. Bio-chemical studies of rasasindur were also demonstrated. It interacts with Bovine Serum Albumin (BSA) with an association constant of (9.76 ± 0.56) × 10 3 M -1 and behaves as a protease inhibitor by inhibiting the proteolysis of BSA by trypsin. It also showed mild antioxidant properties. Copyright © 2017 Transdisciplinary University, Bangalore and World Ayurveda Foundation. Published by Elsevier B.V. All rights reserved.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=5238742','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=5238742"><span>S, N‐Co‐Doped Graphene‐Nickel Cobalt <span class="hlt">Sulfide</span> Aerogel: Improved Energy Storage and Electrocatalytic Performance</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>He, Guanjie; Qiao, Mo; Li, Wenyao; Lu, Yao; Zhao, Tingting; Zou, Rujia; Li, Bo; Darr, Jawwad A.; Hu, Junqing; Titirici, Maria‐Magdalena</p> <p>2016-01-01</p> <p><span class="hlt">Metal</span> <span class="hlt">sulfides</span> are commonly used in energy storage and electrocatalysts due to their redox centers and active sites. Most literature reports show that their performance decreases significantly caused by oxidation in alkaline electrolyte during electrochemical testing. Herein, S and N co‐doped graphene‐<span class="hlt">based</span> nickel cobalt <span class="hlt">sulfide</span> aerogels are synthesized for use as rechargeable alkaline battery electrodes and oxygen reduction reaction (ORR) catalysts. Notably, this system shows improved cyclability due to the stabilization effect of the S and N co‐doped graphene aerogel (SNGA). This reduces the rate of oxidation and the decay of electronic conductivity of the <span class="hlt">metal</span> <span class="hlt">sulfides</span> materials in alkaline electrolyte, i.e., the capacity decrease of CoNi2S4/SNGA is 4.2% for 10 000 cycles in a three‐electrode test; the current retention of 88.6% for Co—S/SNGA after 12 000 s current–time chronoamperometric response in the ORR test is higher than corresponding Co—S nanoparticles and Co—S/non‐doped graphene aerogels. Importantly, the results here confirm that the Ni—Co—S ternary materials behave as an electrode for rechargeable alkaline batteries rather than supercapacitors electrodes in three‐electrode test as commonly described and accepted in the literature. Furthermore, formulas to evaluate the performance of hybrid battery devices are specified. PMID:28105397</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/28643429','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/28643429"><span>Advances and Challenges in <span class="hlt">Metal</span> <span class="hlt">Sulfides</span>/Selenides for Next-Generation Rechargeable Sodium-Ion Batteries.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Hu, Zhe; Liu, Qiannan; Chou, Shu-Lei; Dou, Shi-Xue</p> <p>2017-12-01</p> <p>Rechargeable sodium-ion batteries (SIBs), as the most promising alternative to commercial lithium-ion batteries, have received tremendous attention during the last decade. Among all the anode materials for SIBs, <span class="hlt">metal</span> <span class="hlt">sulfides</span>/selenides (MXs) have shown inspiring results because of their versatile material species and high theoretical capacity. They suffer from large volume expansion, however, which leads to bad cycling performance. Thus, methods such as carbon modification, nanosize design, electrolyte optimization, and cut-off voltage control are used to obtain enhanced performance. Here, recent progress on MXs is summarized in terms of arranging the crystal structure, synthesis methods, electrochemical performance, mechanisms, and kinetics. Challenges are presented and effective ways to solve the problems are proposed, and a perspective for future material design is also given. It is hoped that light is shed on the development of MXs to help finally find applications for next-generation rechargeable batteries. © 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/26423650','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/26423650"><span>Safety and efficacy of the HIV-1 attachment inhibitor prodrug <span class="hlt">BMS</span>-663068 in treatment-experienced individuals: 24 week results of AI438011, a phase 2b, randomised controlled trial.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Lalezari, Jacob P; Latiff, Gulam H; Brinson, Cynthia; Echevarría, Juan; Treviño-Pérez, Sandra; Bogner, Johannes R; Thompson, Melanie; Fourie, Jan; Sussmann Pena, Otto A; Mendo Urbina, Fernando C; Martins, Marcelo; Diaconescu, Iulian G; Stock, David A; Joshi, Samit R; Hanna, George J; Lataillade, Max</p> <p>2015-10-01</p> <p><span class="hlt">BMS</span>-663068 is an oral prodrug of <span class="hlt">BMS</span>-626529, an attachment inhibitor that binds to HIV-1 gp120, blocking viral attachment to host CD4 cells. AI438011 is an ongoing trial investigating the efficacy, safety, and dose-response of <span class="hlt">BMS</span>-663068 in treatment-experienced, HIV-1-infected patients. Herein we present the results of the primary analysis. AI438011 is a phase 2b, randomised, active-controlled trial, at 53 hospitals and outpatient clinics across ten countries in North and South America, Europe, and Africa. Individuals with an HIV-1 RNA viral load of at least 1000 copies per mL and a <span class="hlt">BMS</span>-626529 half-maximum inhibitory concentration lower than 100 nmol/L were randomly assigned (1:1:1:1:1) to receive either <span class="hlt">BMS</span>-663068 at 400 mg twice daily, 800 mg twice daily, 600 mg once daily, or 1200 mg once daily or ritonavir-boosted atazanavir (300 mg of atazanavir and 100 mg of ritonavir once daily), each with 400 mg of raltegravir twice daily and 300 mg of tenofovir disoproxil fumarate once daily as a backbone. The sponsor, participants, and investigators were masked for <span class="hlt">BMS</span>-663068 dose but not for allocation. Primary endpoints were the proportion of patients with an HIV-1 RNA viral load less than 50 copies per mL (response rate) at week 24 and the frequency of serious adverse events and adverse events leading to discontinuation, up to the week 24 analysis. The primary analyses included all patients who received at least one dose of study drug (modified intention-to-treat population). This study is registered at ClinicalTrials.gov, NCT01384734. Between July 26, 2011, and July 16, 2012, 581 participants were assessed for eligibility. Of these, 254 patients were randomly assigned to receive either <span class="hlt">BMS</span>-663068 (n=52 for the 400 mg twice daily group, n=50 for the 800 mg twice daily group, n=51 for the 600 mg once daily group, and n=50 for the 1200 mg once daily group) or ritonavir-boosted atazanavir (n=51). 200 patients received at least one dose of <span class="hlt">BMS</span>-663068, and 51 patients</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2014NatSR...4E4366L','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2014NatSR...4E4366L"><span>A malonitrile-functionalized <span class="hlt">metal</span>-organic framework for hydrogen <span class="hlt">sulfide</span> detection and selective amino acid molecular recognition</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Li, Haiwei; Feng, Xiao; Guo, Yuexin; Chen, Didi; Li, Rui; Ren, Xiaoqian; Jiang, Xin; Dong, Yuping; Wang, Bo</p> <p>2014-03-01</p> <p>A novel porous polymeric fluorescence probe, MN-ZIF-90, has been designed and synthesized for quantitative hydrogen <span class="hlt">sulfide</span> (H2S) fluorescent detection and highly selective amino acid recognition. This distinct crystalline structure, derived from rational design and malonitrile functionalization, can trigger significant enhancement of its fluorescent intensity when exposed to H2S or cysteine molecules. Indeed this new <span class="hlt">metal</span>-organic framework (MOF) structure shows high selectivity of biothiols over other amino acids and exhibits favorable stability. Moreover, in vitro viability assays on HeLa cells show low cytotoxicity of MN-ZIF-90 and its imaging contrast efficiency is further demonstrated by fluorescence microscopy studies. This facile yet powerful strategy also offers great potential of using open-framework materials (i.e. MOFs) as the novel platform for sensing and other biological applications.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://pubs.usgs.gov/pp/pp1732/pp1732c/index.html','USGSPUBS'); return false;" href="https://pubs.usgs.gov/pp/pp1732/pp1732c/index.html"><span>Geochemical and Sulfur-Isotopic Signatures of Volcanogenic Massive <span class="hlt">Sulfide</span> Deposits on Prince of Wales Island and Vicinity, Southeastern Alaska</span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Slack, John F.; Shanks, Wayne C.; Karl, Susan M.; Gemery, Pamela A.; Bittenbender, Peter E.; Ridley, W. Ian</p> <p>2007-01-01</p> <p>Stratabound volcanogenic massive <span class="hlt">sulfide</span> (VMS) deposits on Prince of Wales Island and vicinity, southeastern Alaska, occur in two volcanosedimentary sequences of Late Proterozoic through Cambrian and of Ordovician through Early Silurian age. This study presents geochemical data on <span class="hlt">sulfide</span>-rich samples, in situ laser-ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) of <span class="hlt">sulfide</span> minerals, and sulfur-isotopic analyses of <span class="hlt">sulfides</span> and sulfates (barite) for identifying and distinguishing between primary sea-floor signatures and later regional metamorphic overprints. These datasets are also used here in an attempt to discriminate the VMS deposits in the older Wales Group from those in the younger Moira Sound unit (new informal name). The Wales Group and its contained VMS deposits have been multiply deformed and metamorphosed from greenschist to amphibolite grade, whereas the Moira Sound unit and related VMS deposits are less deformed and generally less metamorphosed (lower to middle greenschist grade). Variations in the <span class="hlt">sulfide</span> mineral assemblages and textures of the VMS deposits in both sequences reflect a combination of processes, including primary sea-floor mineralization and sub-sea-floor zone refining, followed by metamorphic recrystallization. Very coarse grained (>1 cm diam) <span class="hlt">sulfide</span> minerals and abundant pyrrhotite are restricted to VMS deposits in a small area of the Wales Group, at Khayyam and Stumble-On, which record high-grade metamorphism of the <span class="hlt">sulfides</span>. Geochemical and sulfur-isotopic data distinguish the VMS deposits in the Wales Group from those in the Moira Sound unit. Although <span class="hlt">base</span>- and precious-<span class="hlt">metal</span> contents vary widely in <span class="hlt">sulfide</span>-rich samples from both sequences, samples from the Moira Sound generally have proportionately higher Ag contents relative to <span class="hlt">base</span> <span class="hlt">metals</span> and Au. In situ LA-ICP-MS analysis of trace elements in the <span class="hlt">sulfide</span> minerals suggests that primary sea-floor hydrothermal signatures are preserved in some samples (for</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/biblio/6815333-physiological-effects-additional-stressor-fish-exposed-simulated-heavy-metal-containing-effluent-from-sulfide-ore-smeltery','SCIGOV-STC'); return false;" href="https://www.osti.gov/biblio/6815333-physiological-effects-additional-stressor-fish-exposed-simulated-heavy-metal-containing-effluent-from-sulfide-ore-smeltery"><span>Physiological effects of an additional stressor on fish exposed to a simulated heavy-<span class="hlt">metal</span>-containing effluent from a <span class="hlt">sulfide</span> ore smeltery</span></a></p> <p><a target="_blank" href="http://www.osti.gov/search">DOE Office of Scientific and Technical Information (OSTI.GOV)</a></p> <p>Larsson, A.; Haux, C.; Sjoebeck, M.L.</p> <p>1984-04-01</p> <p>Perches (Perca fluviatilis), kept in slightly hypotonic brackish water, were exposed to dilutions of a simulated heavy-<span class="hlt">metal</span>-containing effluent from a <span class="hlt">sulfide</span> ore smeltery . Biochemical and hematological effects of the effluent, as well as the <span class="hlt">metal</span> residues in liver and muscle tissues, were investigated after 12 and 27 days of exposure. The <span class="hlt">metal</span> analyses revealed no significant uptake of <span class="hlt">metals</span> in liver and muscle during the experiment. In spite of this, the exposed fish showed several physiological effects. Some of these, e.g., anemia, hypocalcemia, increased muscle water content, and reduced liver size, were of a transient nature, while others, suchmore » as disturbed chloride balance and hyperglycemia, seemed to be more persistent. At the end of the experiment (29-33 days of exposure), the physiological response to stress treatment (asphyxia) and a subsequent recovery were studied in exposed and unexposed fish. This stress investigation indicates that an additional stressor may strengthen the toxic effects of the heavy-<span class="hlt">metal</span>-containing effluent. Furthermore, the secondary stress responses were more pronounced and the ability to recover from them seemed to be impaired in exposed fish as compared to unexposed fish.« less</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/20080026264','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/20080026264"><span>Thermal Constraints from Siderophile Trace Elements in Acapulcoite-Lodranite <span class="hlt">Metals</span></span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Herrin, Jason S.; Mittlefehldt, D. W.; Humayun, M.</p> <p>2006-01-01</p> <p>A fundamental process in the formation of differentiated bodies is the segregation of <span class="hlt">metal-sulfide</span> and silicate phases, leading to the formation of a <span class="hlt">metallic</span> core. The only known direct record of this process is preserved in some primitive achondrites, such as the acapulcoite-lodranites. Meteorites of this clan are the products of thermal metamorphism of a chondritic parent. Most acapulcoites have experienced significant partial melting of the <span class="hlt">metal-sulfide</span> system but not of silicates, while lodranites have experienced partial melting and melt extraction of both. The clan has experienced a continuum of temperatures relevant to the onset of <span class="hlt">metal</span> mobility in asteroidal bodies and thus could yield insight into the earliest stages of core formation. Acapulcoite GRA 98028 contains relict chondrules, high modal <span class="hlt">sulfide/metal</span>, has the lowest 2-pyroxene closure temperature, and represents the least metamorphosed state of the parent body among the samples examined. Comparison of the <span class="hlt">metal-sulfide</span> component of other clan members to GRA 98028 can give an idea of the effects of metamorphism.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/23537977','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/23537977"><span>Bare-<span class="hlt">metal</span> stenting of large coronary arteries in ST-elevation myocardial infarction is associated with low rates of target vessel revascularization.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Shugman, Ibrahim M; Hee, Leia; Mussap, Christian J; Diu, Patrick; Lo, Sidney; Hopkins, Andrew P; Nguyen, Phong; Taylor, David; Rajaratnam, Rohan; Leung, Dominic; Thomas, Liza; Juergens, Craig P; French, John K</p> <p>2013-04-01</p> <p>During percutaneous coronary intervention (PCI) performed in the emergent setting of ST-segment elevation myocardial infarction (STEMI), uncertainty about patients' ability to comply with 12 months dual antiplatelet therapy after drug-eluting stenting is common, and thus, selective bare-<span class="hlt">metal</span> stent (<span class="hlt">BMS</span>) deployment could be an attractive strategy if this achieved low target vessel revascularization (TVR) rates in large infarct-related arteries (IRAs) (≥3.5 mm). To evaluate this hypothesis, among 1,282 patients with STEMI who underwent PCI during their initial hospitalization, we studied 1,059 patients (83%) who received <span class="hlt">BMS</span>, of whom 512 (48%) had large IRAs ≥3.5 mm in diameter, 333 (31%) had IRAs 3 to 3.49 mm, and 214 (20%) had IRAs <3 mm. At 1 year, TVR rate in patients with <span class="hlt">BMS</span> was 5.8% (2.2% with large <span class="hlt">BMS</span> [≥3.5 mm], 9.2% with <span class="hlt">BMS</span> 3-3.49 mm [intermediate], and 9.0% with <span class="hlt">BMS</span> <3.0 mm [small], P < .001). The rates of death/reinfarction among patients with large <span class="hlt">BMS</span> compared with intermediate <span class="hlt">BMS</span> or small <span class="hlt">BMS</span> were lower (6.6% vs 11.7% vs 9.0%, P = .042). Among patients who received <span class="hlt">BMS</span>, the independent predictors of TVR at 1 year were the following: vessel diameter <3.5 mm (odds ratio [OR] 4.39 [95% CI 2.24-8.60], P < .001), proximal left anterior descending coronary artery lesions (OR 1.89 [95% CI 1.08-3.31], P = .027), hypertension (OR 2.01 [95% CI 1.17-3.438], P = .011), and prior PCI (OR 3.46 [95% CI 1.21-9.85], P = .02). The predictors of death/myocardial infarction at 1 year were pre-PCI cardiogenic shock (OR 8.16 [95% CI 4.16-16.01], P < .001), age ≥65 years (OR 2.63 [95% CI 1.58-4.39], P < .001), left anterior descending coronary artery culprit lesions (OR 1.95 [95% CI 1.19-3.21], P = .008), female gender (OR 1.93 [95% CI 1.12-3.32], P = .019), and American College of Cardiology/American Heart Association lesion classes B2 and C (OR 2.17 [95% CI 1.10-4.27], P = .026). Bare-<span class="hlt">metal</span> stent deployment in STEMI patients with IRAs ≥3.5 mm was associated</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/26815559','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/26815559"><span>Impending rupture of saphenous vein graft aneurysm with floating fractured bare <span class="hlt">metal</span> stent treated by coil embolization and covered stent implantation.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Kodama, Atsuko; Kurita, Tairo; Kato, Osamu; Suzuki, Takahiko</p> <p>2016-11-01</p> <p>Aneurysmal degeneration of a saphenous vein graft (SVG) is a rare, but potentially fatal complication of coronary artery bypass graft (CABG) surgery. In this case report, a patient that had undergone prior CABG surgery and bare <span class="hlt">metal</span> stent (<span class="hlt">BMS</span>) implantation at the site of a stenotic SVG lesion presented at our hospital with chest pain, and an SVG aneurysm was detected at the previous <span class="hlt">BMS</span> implantation site. In addition, the implanted <span class="hlt">BMS</span> was fractured and floating in the SVG aneurysm. The SVG aneurysm was successfully occluded by percutaneous intervention, using a combination of distal covered stent deployment at the site of the anastomosis between the native coronary artery and the SVG and proximal coil embolization of the aneurysm.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/servlets/purl/866885','DOE-PATENT-XML'); return false;" href="https://www.osti.gov/servlets/purl/866885"><span>Process for removing <span class="hlt">metals</span> from water</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Napier, John M.; Hancher, Charles M.; Hackett, Gail D.</p> <p>1989-01-01</p> <p>A process for removing <span class="hlt">metals</span> from water including the steps of prefiltering solids from the water, adjusting the pH to between about 2 and 3, reducing the amount of dissolved oxygen in the water, increasing the pH to between about 6 and 8, adding water-soluble <span class="hlt">sulfide</span> to precipitate insoluble <span class="hlt">sulfide</span>- and hydroxide-forming <span class="hlt">metals</span>, adding a flocculating agent, separating precipitate-containing floc, and postfiltering the resultant solution. The postfiltered solution may optionally be eluted through an ion exchange resin to remove residual <span class="hlt">metal</span> ions.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/biblio/6874265','DOE-PATENT-XML'); return false;" href="https://www.osti.gov/biblio/6874265"><span>Process for removing <span class="hlt">metals</span> from water</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Napier, J.M.; Hancher, C.M.; Hackett, G.D.</p> <p>1987-06-29</p> <p>A process for removing <span class="hlt">metals</span> from water including the steps of prefiltering solids from the water, adjusting the pH to between about 2 and 3, reducing the amount of dissolved oxygen in the water, increasing the pH to between about 6 and 8, adding water-soluble <span class="hlt">sulfide</span> to precipitate insoluble <span class="hlt">sulfide</span>- and hydroxide-forming <span class="hlt">metals</span>, adding a containing floc, and postfiltering the resultant solution. The postfiltered solution may optionally be eluted through an ion exchange resin to remove residual <span class="hlt">metal</span> ions. 2 tabs.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/19380625','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/19380625"><span>Evaluation of the novel myocardial perfusion positron-emission tomography tracer 18F-<span class="hlt">BMS</span>-747158-02: comparison to 13N-ammonia and validation with microspheres in a pig model.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Nekolla, S G; Reder, S; Saraste, A; Higuchi, T; Dzewas, G; Preissel, A; Huisman, M; Poethko, T; Schuster, T; Yu, M; Robinson, S; Casebier, D; Henke, J; Wester, H J; Schwaiger, M</p> <p>2009-05-05</p> <p>Positron-emission tomography (PET) tracers for myocardial perfusion are commonly labeled with short-lived isotopes that limit their widespread clinical use. 18F-<span class="hlt">BMS</span>-747158-02 (18F-<span class="hlt">BMS</span>) is a novel pyridaben derivative that was evaluated for assessment of myocardial perfusion by comparison with 13N-ammonia (13NH3) and with radioactive microspheres in a pig model. Fourteen pigs injected with 500 MBq of 13NH3 or 100 to 200 MBq of 18F-<span class="hlt">BMS</span> underwent dynamic PET at rest and during pharmacological stress. In 8 of these pigs, 18F-<span class="hlt">BMS</span> was injected during stress combined with transient, 2.5-minute constriction of the left anterior descending coronary artery. Radioactive microspheres were coinjected with 18F-<span class="hlt">BMS</span>. Ratios of myocardial tracer uptake to surrounding tissues were determined, and myocardial blood flow was quantified by compartmental modeling. Both tracers showed high and homogeneous myocardial uptake. Compared with 13NH3, 18F-<span class="hlt">BMS</span> showed higher activity ratios between myocardium and blood (rest 2.5 versus 4.1; stress 2.1 versus 5.8), liver (rest 1.2 versus 1.8; stress 0.7 versus 2.0), and lungs (rest 2.5 versus 4.2; stress 2.9 versus 6.4). Regional myocardial blood flow assessed with 18F-<span class="hlt">BMS</span> PET showed good correlation (r=0.88, slope=0.84) and agreement (mean difference -0.10 [25th percentile -0.3, 75th percentile 0.1 mL x min(-1) x g(-1)]) with that measured with radioactive microspheres over a flow range from 0.1 to 3.0 mL x min(-1) x g(-1). The extent of defects induced by left anterior descending coronary artery constriction measured by 18F-<span class="hlt">BMS</span> and microspheres also correlated closely (r=0.63, slope=1.1). 18F-<span class="hlt">BMS</span>-747158-02 is a very attractive new PET perfusion tracer that allows quantitative assessment of regional myocardial perfusion over a wide flow range. The long half-life of 18F renders this tracer useful for clinical PET/CT applications in the workup of patients with suspected or proven coronary artery disease.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/16749308','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/16749308"><span>Online oxygen control for <span class="hlt">sulfide</span> oxidation in anaerobic treatment of high-sulfate wastewater.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Khanal, Samir Kumar; Huang, Ju-Chang</p> <p>2006-04-01</p> <p>A new technique for <span class="hlt">sulfide</span> control was investigated in an upflow-anaerobic filter (UAF) treating high-strength, sulfate-rich wastewater. The technique used periodic oxygen injection using oxidation-reduction potential (ORP) as a controlling parameter to regulate oxygen injection. The UAF was operated at a constant influent total-organic carbon of 6740 mg/L but with different influent sulfates of 1000, 3000, and 6000 mg/L. At 1000 and 3000 mg/L influent sulfates, the produced <span class="hlt">sulfide</span> did not impose any inhibition to methane-producing bacteria (MPB). However, at 6000 mg/L influent sulfate, the produced dissolved <span class="hlt">sulfide</span> of 804 mg S/L (free <span class="hlt">sulfide</span> = 280 mg S/L) severely inhibited the methanogenesis, but not the sulfidogenesis. Upon oxygen injection at elevated ORP of -265 mV, <span class="hlt">sulfides</span> were almost completely eliminated with a concomitant improvement in methane yield by 46%. If oxygenation was excessive because of an oversetting of ORP, the excess oxygen could be used rapidly by facultative heterotrophs, thereby protecting the MPB from oxygen stress. Regarding online <span class="hlt">sulfide</span> oxidation, it was found that the biogas and injected oxygen needed to pass through an aqueous layer containing trace <span class="hlt">metals</span>, which were found to have a significant catalytic effect on abiotic <span class="hlt">sulfide</span> oxidation.</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_14");'>14</a></li> <li><a href="#" onclick='return showDiv("page_15");'>15</a></li> <li class="active"><span>16</span></li> <li><a href="#" onclick='return showDiv("page_17");'>17</a></li> <li><a href="#" onclick='return showDiv("page_18");'>18</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_16 --> <div id="page_17" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_15");'>15</a></li> <li><a href="#" onclick='return showDiv("page_16");'>16</a></li> <li class="active"><span>17</span></li> <li><a href="#" onclick='return showDiv("page_18");'>18</a></li> <li><a href="#" onclick='return showDiv("page_19");'>19</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="321"> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/29207279','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/29207279"><span>Biofabrication of morphology improved cadmium <span class="hlt">sulfide</span> nanoparticles using Shewanella oneidensis bacterial cells and ionic liquid: For toxicity against brain cancer cell lines.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Wang, Li; Chen, Siyuan; Ding, Yiming; Zhu, Qiang; Zhang, Nijia; Yu, Shuqing</p> <p>2018-01-01</p> <p>The present work determines the anticancer activity of bio-mediated synthesized cadmium <span class="hlt">sulfide</span> nanoparticles using the ionic liquid and bacterial cells (Shewanella oneidensis). Bacterial cells have been exposed to be important resources that hold huge potential as ecofriendly, cost-effective, evading toxic of dangerous chemicals and the alternative of conventional physiochemical synthesis. The Shewanella oneidensis is an important kind of <span class="hlt">metal</span> reducing bacterium, known as its special anaerobic respiratory and sulfate reducing capacity. The crystalline nature, phase purity and surface morphology of biosynthesized cadmium <span class="hlt">sulfide</span> nanoparticles were analyzed by Fourier transform infrared spectroscopy, X-ray diffraction, Field emission scanning electron microscopy, Energy dispersive spectroscopy and Transmission electron microscopy. The use of imidazolium <span class="hlt">based</span> ionic liquids as soft templating agent for controlling self-assembly and crystal growth direction of <span class="hlt">metal</span> <span class="hlt">sulfide</span> nanoparticles has also advanced as an important method. The microscopic techniques showed that the nanoparticles are designed on the nano form and have an excellent spherical morphology, due to the self-assembled mechanism of ionic liquid assistance. The antitumor efficiency of the cadmium <span class="hlt">sulfide</span> nanoparticles was investigated against brain cancer cell lines using rat glioma cell lines. The effectively improved nano-crystalline and morphological structure of CdS nanoparticles in the presence of IL exhibit excellent cytotoxicity and dispersion ability on the cell shape is completely spread out showing a nice toxic environment against cancer cells. The cytotoxicity effect of cadmium <span class="hlt">sulfide</span> nanoparticles was discussed with a diagrammatic representation. Copyright © 2017. Published by Elsevier B.V.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/24462894','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/24462894"><span>Alternative waste residue materials for passive in situ prevention of <span class="hlt">sulfide</span>-mine tailings oxidation: a field evaluation.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Nason, Peter; Johnson, Raymond H; Neuschütz, Clara; Alakangas, Lena; Öhlander, Björn</p> <p>2014-02-28</p> <p>Novel solutions for <span class="hlt">sulfide</span>-mine tailings remediation were evaluated in field-scale experiments on a former tailings repository in northern Sweden. Uncovered <span class="hlt">sulfide</span>-tailings were compared to sewage-sludge biosolid amended tailings over 2 years. An application of a 0.2m single-layer sewage-sludge amendment was unsuccessful at preventing oxygen ingress to underlying tailings. It merely slowed the <span class="hlt">sulfide</span>-oxidation rate by 20%. In addition, sludge-derived <span class="hlt">metals</span> (Cu, Ni, Fe, and Zn) migrated and precipitated at the tailings-to-sludge interface. By using an additional 0.6m thick fly-ash sealing layer underlying the sewage sludge layer, a solution to mitigate oxygen transport to the underlying tailings and minimize <span class="hlt">sulfide</span>-oxidation was found. The fly-ash acted as a hardened physical barrier that prevented oxygen diffusion and provided a trap for sludge-borne <span class="hlt">metals</span>. Nevertheless, the biosolid application hampered the application, despite the advances in the effectiveness of the fly-ash layer, as sludge-borne nitrate leached through the cover system into the underlying tailings, oxidizing pyrite. This created a 0.3m deep oxidized zone in 6-years. This study highlights that using sewage sludge in unconventional cover systems is not always a practical solution for the remediation of <span class="hlt">sulfide</span>-bearing mine tailings to mitigate against <span class="hlt">sulfide</span> weathering and acid rock drainage formation. Copyright © 2014 Elsevier B.V. All rights reserved.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://pubs.er.usgs.gov/publication/70093894','USGSPUBS'); return false;" href="https://pubs.er.usgs.gov/publication/70093894"><span>Alternative waste residue materials for passive in situ prevention of <span class="hlt">sulfide</span>-mine tailings oxidation: A field evaluation</span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Nason, Peter; Johnson, Raymond H.; Neuschutz, Clara; Alakangas, Lena; Ohlander, Bjorn</p> <p>2014-01-01</p> <p>Novel solutions for <span class="hlt">sulfide</span>-mine tailings remediation were evaluated in field-scale experiments on a former tailings repository in northern Sweden. Uncovered <span class="hlt">sulfide</span>-tailings were compared to sewage-sludge biosolid amended tailings over 2 years. An application of a 0.2 m single-layer sewage-sludge amendment was unsuccessful at preventing oxygen ingress to underlying tailings. It merely slowed the <span class="hlt">sulfide</span>-oxidation rate by 20%. In addition, sludge-derived <span class="hlt">metals</span> (Cu, Ni, Fe, and Zn) migrated and precipitated at the tailings-to-sludge interface. By using an additional 0.6 m thick fly-ash sealing layer underlying the sewage sludge layer, a solution to mitigate oxygen transport to the underlying tailings and minimize <span class="hlt">sulfide</span>-oxidation was found. The fly-ash acted as a hardened physical barrier that prevented oxygen diffusion and provided a trap for sludge-borne <span class="hlt">metals</span>. Nevertheless, the biosolid application hampered the application, despite the advances in the effectiveness of the fly-ash layer, as sludge-borne nitrate leached through the cover system into the underlying tailings, oxidizing pyrite. This created a 0.3 m deep oxidized zone in 6-years. This study highlights that using sewage sludge in unconventional cover systems is not always a practical solution for the remediation of <span class="hlt">sulfide</span>-bearing mine tailings to mitigate against <span class="hlt">sulfide</span> weathering and acid rock drainage formation.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/22284519','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/22284519"><span>Sulfur K-edge XANES and acid volatile <span class="hlt">sulfide</span> analyses of changes in chemical speciation of S and Fe during sequential extraction of trace <span class="hlt">metals</span> in anoxic sludge from biogas reactors.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Shakeri Yekta, Sepehr; Gustavsson, Jenny; Svensson, Bo H; Skyllberg, Ulf</p> <p>2012-01-30</p> <p>The effect of sequential extraction of trace <span class="hlt">metals</span> on sulfur (S) speciation in anoxic sludge samples from two lab-scale biogas reactors augmented with Fe was investigated. Analyses of sulfur K-edge X-ray absorption near edge structure (S XANES) spectroscopy and acid volatile <span class="hlt">sulfide</span> (AVS) were conducted on the residues from each step of the sequential extraction. The S speciation in sludge samples after AVS analysis was also determined by S XANES. Sulfur was mainly present as FeS (≈ 60% of total S) and reduced organic S (≈ 30% of total S), such as organic <span class="hlt">sulfide</span> and thiol groups, in the anoxic solid phase. Sulfur XANES and AVS analyses showed that during first step of the extraction procedure (the removal of exchangeable cations), a part of the FeS fraction corresponding to 20% of total S was transformed to zero-valent S, whereas Fe was not released into the solution during this transformation. After the last extraction step (organic/<span class="hlt">sulfide</span> fraction) a secondary Fe phase was formed. The change in chemical speciation of S and Fe occurring during sequential extraction procedure suggests indirect effects on trace <span class="hlt">metals</span> associated to the FeS fraction that may lead to incorrect results. Furthermore, by S XANES it was verified that the AVS analysis effectively removed the FeS fraction. The present results identified critical limitations for the application of sequential extraction for trace <span class="hlt">metal</span> speciation analysis outside the framework for which the methods were developed. Copyright © 2011 Elsevier B.V. All rights reserved.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/24917546','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/24917546"><span>Pharmacologic profile of the Adnectin <span class="hlt">BMS</span>-962476, a small protein biologic alternative to PCSK9 antibodies for low-density lipoprotein lowering.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Mitchell, Tracy; Chao, Ginger; Sitkoff, Doree; Lo, Fred; Monshizadegan, Hossain; Meyers, Daniel; Low, Simon; Russo, Katie; DiBella, Rose; Denhez, Fabienne; Gao, Mian; Myers, Joseph; Duke, Gerald; Witmer, Mark; Miao, Bowman; Ho, Siew P; Khan, Javed; Parker, Rex A</p> <p>2014-08-01</p> <p>Proprotein convertase subtilisin kexin-9 (PCSK9) is an important pharmacological target for decreasing low-density lipoprotein (LDL) in cardiovascular disease, although seemingly inaccessible to small molecule approaches. Compared with therapeutic IgG antibodies currently in development, targeting circulating PCSK9 with smaller molecular scaffolds could offer different profiles and reduced dose burdens. This inspired genesis of PCSK9-binding Adnectins, a protein family derived from human fibronectin-10th-type III-domain and engineered for high-affinity target binding. <span class="hlt">BMS</span>-962476, an ∼11-kDa polypeptide conjugated to polyethylene glycol to enhance pharmacokinetics, binds with subnanomolar affinity to human. The X-ray cocrystal structure of PCSK9 with a progenitor Adnectin shows ∼910 Å(2) of PCSK9 surface covered next to the LDL receptor binding site, largely by residues of a single loop of the Adnectin. In hypercholesterolemic, overexpressing human PCSK9 transgenic mice, <span class="hlt">BMS</span>-962476 rapidly lowered cholesterol and free PCSK9 levels. In genomic transgenic mice, <span class="hlt">BMS</span>-962476 potently reduced free human PCSK9 (ED50 ∼0.01 mg/kg) followed by ∼2-fold increases in total PCSK9 before return to baseline. Treatment of cynomolgus monkeys with <span class="hlt">BMS</span>-962476 rapidly suppressed free PCSK9 >99% and LDL-cholesterol ∼55% with subsequent 6-fold increase in total PCSK9, suggesting reduced clearance of circulating complex. Liver sterol response genes were consequently downregulated, following which LDL and total PCSK9 returned to baseline. These studies highlight the rapid dynamics of PCSK9 control over LDL and liver cholesterol metabolism and characterize <span class="hlt">BMS</span>-962476 as a potent and efficacious PCSK9 inhibitor. Copyright © 2014 by The American Society for Pharmacology and Experimental Therapeutics.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2017AGUFM.B13C1782C','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2017AGUFM.B13C1782C"><span>Tungsten speciation in <span class="hlt">sulfidic</span> waters: Stability and lability of thiotungstates</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Cui, M.; Johannesson, K. H.</p> <p>2017-12-01</p> <p>Tungsten (W) is an important <span class="hlt">metal</span> that has been widely used in industries. It normally occurs as the monomeric tungstate oxyanion in circumneutral to alkaline pH natural waters but tends to form polytungstates species at low pH and high W concentrations. A number of studies show that W is strongly correlated with dissolved <span class="hlt">sulfide</span> in natural waters. Laboratory investigations have presented evidence that, like Mo, W undergoes <span class="hlt">sulfidation</span> in four steps that conserve tungstate and lead to the formation of tetrathiotungstate. In addition, natural waters may be seasonally anoxic, thus W speciation is likely to be kinetically controlled. Our previous studies showed that the speciation of tungsten is important in controlling its fate and transport in natural waters. Thiotungstate and tungstate are adsorbed differently to the mineral surfaces such as goethite and pyrite. In our present study, we have observed that the <span class="hlt">sulfidation</span> reactions of W are acid catalyzed. We suggest that in environments such as sediment porewaters, the presence of Brønsted acids, will promote conversion of tungstate to thiotungstates. However, the conversion of the predominant anion from a hard to a soft <span class="hlt">base</span> alters W's geochemical behavior, increasing its susceptibility to scavenging. Thus, an important product of this research will be an improved understanding of the scavenging pathways of W in euxinic environments.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/biblio/22489252-highly-sensitive-photodetectors-based-hybrid-sns-sub-copper-indium-sulfide-quantum-dots','SCIGOV-STC'); return false;" href="https://www.osti.gov/biblio/22489252-highly-sensitive-photodetectors-based-hybrid-sns-sub-copper-indium-sulfide-quantum-dots"><span>Highly sensitive photodetectors <span class="hlt">based</span> on hybrid 2D-0D SnS{sub 2}-copper indium <span class="hlt">sulfide</span> quantum dots</span></a></p> <p><a target="_blank" href="http://www.osti.gov/search">DOE Office of Scientific and Technical Information (OSTI.GOV)</a></p> <p>Huang, Yun; Zhan, Xueying; Xu, Kai</p> <p>2016-01-04</p> <p>Both high speed and efficiency of photoelectric conversion are essential for photodetectors. As an emerging layered <span class="hlt">metal</span> dichalcogenide (LMD), tin disulfide owns intrinsic faster photodetection ability than most other LMDs but poor light absorption and low photoelectric conversion efficiency. We develop an efficient method to enhance its performance by constructing a SnS{sub 2}-copper indium <span class="hlt">sulfide</span> hybrid structure. As a result, the responsivity reaches 630 A/W, six times stronger than pristine SnS{sub 2} and much higher than most other LMDs photodetectors. Additionally, the photocurrents are enhanced by more than 1 order of magnitude. Our work may open up a pathway to improvemore » the performance of photodetectors <span class="hlt">based</span> on LMDs.« less</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/25747480','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/25747480"><span>Anti-inflammatory and cytoprotective properties of hydrogen <span class="hlt">sulfide</span>.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Gemici, Burcu; Wallace, John L</p> <p>2015-01-01</p> <p>Hydrogen <span class="hlt">sulfide</span> is an endogenous gaseous mediator that plays important roles in many physiological processes in microbes, plants, and animals. This chapter focuses on the important roles of hydrogen <span class="hlt">sulfide</span> in protecting tissues against injury, promoting the repair of damage, and downregulating the inflammatory responses. The chapter focuses largely, but not exclusively, on these roles of hydrogen <span class="hlt">sulfide</span> in the gastrointestinal tract. Hydrogen <span class="hlt">sulfide</span> is produced throughout the gastrointestinal tract, and it contributes to maintenance of mucosal integrity. Suppression of hydrogen <span class="hlt">sulfide</span> synthesis renders the tissue more susceptible to injury and it impairs repair. In contrast, administration of hydrogen <span class="hlt">sulfide</span> donors can increase resistance to injury and accelerate repair. Hydrogen <span class="hlt">sulfide</span> synthesis is rapidly and dramatically enhanced in the gastrointestinal tract after injury is induced. These increases occur specifically at the site of tissue injury. Hydrogen <span class="hlt">sulfide</span> also plays an important role in promoting resolution of inflammation, and restoration of normal tissue function. In recent years, these beneficial actions of hydrogen <span class="hlt">sulfide</span> have provided the basis for development of novel hydrogen <span class="hlt">sulfide</span>-releasing drugs. Nonsteroidal anti-inflammatory drugs that release small amounts of hydrogen <span class="hlt">sulfide</span> are among the most advanced of the hydrogen <span class="hlt">sulfide-based</span> drugs. Unlike the parent drugs, these modified drugs do not cause injury in the gastrointestinal tract, and do not interfere with healing of preexisting damage. Because of the increased safety profile of these drugs, they can be used in circumstances in which the toxicity of the parent drug would normally limit their use, such as in chemoprevention of cancer. © 2015 Elsevier Inc. All rights reserved.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://pubs.er.usgs.gov/publication/70033623','USGSPUBS'); return false;" href="https://pubs.er.usgs.gov/publication/70033623"><span>Environmental geochemistry of a Kuroko-type massive <span class="hlt">sulfide</span> deposit at the abandoned Valzinco mine, Virginia, USA</span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Seal, R.R.; Hammarstrom, J.M.; Johnson, A.N.; Piatak, N.M.; Wandless, G.A.</p> <p>2008-01-01</p> <p>The abandoned Valzinco mine, which worked a steeply dipping Kuroko-type massive <span class="hlt">sulfide</span> deposit in the Virginia Au-pyrite belt, contributed significant <span class="hlt">metal</span>-laden acid-mine drainage to the Knight's Branch watershed. The host rocks were dominated by metamorphosed felsic volcanic rocks, which offered limited acid-neutralizing potential. The ores were dominated by pyrite, sphalerite, galena, and chalcopyrite, which represented significant acid-generating potential. Acid-<span class="hlt">base</span> accounting and leaching studies of flotation tailings - the dominant mine waste at the site - indicated that they were acid generating and therefore, should have liberated significant quantities of <span class="hlt">metals</span> to solution. Field studies of mine drainage from the site confirmed that mine drainage and the impacted stream waters had pH values from 1.1 to 6.4 and exceeded aquatic ecosystem toxicity limits for Fe, Al, Cd, Cu, Pb and Zn. Stable isotope studies of water, dissolved SO42 -, and primary and secondary sulfate and <span class="hlt">sulfide</span> minerals indicated that two distinct <span class="hlt">sulfide</span> oxidation pathways were operative at the site: one dominated by Fe(III) as the oxidant, and another by molecular O2 as the oxidant. Reaction-path modeling suggested that geochemical interactions between tailings and waters approached a steady state within about a year. Both leaching studies and geochemical reaction-path modeling provided reasonable predictions of the mine-drainage chemistry.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/servlets/purl/863043','DOE-PATENT-XML'); return false;" href="https://www.osti.gov/servlets/purl/863043"><span>Regeneration of sulfated <span class="hlt">metal</span> oxides and carbonates</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Hubble, Bill R.; Siegel, Stanley; Cunningham, Paul T.</p> <p>1978-03-28</p> <p>Alkali <span class="hlt">metal</span> or alkaline earth <span class="hlt">metal</span> carbonates such as calcium carbonate and magnesium carbonate found in dolomite or limestone are employed for removal of sulfur dioxide from combustion exhaust gases. The sulfated carbonates are regenerated to oxides through use of a solid-solid reaction, particularly calcium <span class="hlt">sulfide</span> with calcium sulfate to form calcium oxide and sulfur dioxide gas. The regeneration is performed by contacting the sulfated material with a reductant gas such as hydrogen within an inert diluent to produce calcium <span class="hlt">sulfide</span> in mixture with the sulfate under process conditions selected to permit the <span class="hlt">sulfide</span>-sulfate, solid-state reaction to occur.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://medlineplus.gov/druginfo/meds/a682258.html','NIH-MEDLINEPLUS'); return false;" href="https://medlineplus.gov/druginfo/meds/a682258.html"><span>Selenium <span class="hlt">Sulfide</span></span></a></p> <p><a target="_blank" href="http://medlineplus.gov/">MedlinePlus</a></p> <p></p> <p></p> <p>... minutes.Do not leave selenium <span class="hlt">sulfide</span> on your hair, scalp, or skin for long periods (e.g., ... jewelry; selenium <span class="hlt">sulfide</span> may damage it. Wash your hair with ordinary shampoo and rinse it well. Shake ...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/28656172','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/28656172"><span><span class="hlt">Sulfide</span> Homeostasis and Nitroxyl Intersect via Formation of Reactive Sulfur Species in Staphylococcus aureus.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Peng, Hui; Shen, Jiangchuan; Edmonds, Katherine A; Luebke, Justin L; Hickey, Anne K; Palmer, Lauren D; Chang, Feng-Ming James; Bruce, Kevin A; Kehl-Fie, Thomas E; Skaar, Eric P; Giedroc, David P</p> <p>2017-01-01</p> <p>Staphylococcus aureus is a commensal human pathogen and a major cause of nosocomial infections. As gaseous signaling molecules, endogenous hydrogen <span class="hlt">sulfide</span> (H 2 S) and nitric oxide (NO·) protect S. aureus from antibiotic stress synergistically, which we propose involves the intermediacy of nitroxyl (HNO). Here, we examine the effect of exogenous <span class="hlt">sulfide</span> and HNO on the transcriptome and the formation of low-molecular-weight (LMW) thiol persulfides of bacillithiol, cysteine, and coenzyme A as representative of reactive sulfur species (RSS) in wild-type and Δ cstR strains of S. aureus . CstR is a per- and polysulfide sensor that controls the expression of a <span class="hlt">sulfide</span> oxidation and detoxification system. As anticipated, exogenous <span class="hlt">sulfide</span> induces the cst operon but also indirectly represses much of the CymR regulon which controls cysteine metabolism. A zinc limitation response is also observed, linking <span class="hlt">sulfide</span> homeostasis to zinc bioavailability. Cellular RSS levels impact the expression of a number of virulence factors, including the exotoxins, particularly apparent in the Δ cstR strain. HNO, like <span class="hlt">sulfide</span>, induces the cst operon as well as other genes regulated by exogenous <span class="hlt">sulfide</span>, a finding that is traced to a direct reaction of CstR with HNO and to an endogenous perturbation in cellular RSS, possibly originating from disassembly of Fe-S clusters. More broadly, HNO induces a transcriptomic response to Fe overload, Cu toxicity, and reactive oxygen species and reactive nitrogen species and shares similarity with the sigB regulon. This work reveals an H 2 S/NO· interplay in S. aureus that impacts transition <span class="hlt">metal</span> homeostasis and virulence gene expression. IMPORTANCE Hydrogen <span class="hlt">sulfide</span> (H 2 S) is a toxic molecule and a recently described gasotransmitter in vertebrates whose function in bacteria is not well understood. In this work, we describe the transcriptomic response of the major human pathogen Staphylococcus aureus to quantified changes in levels of cellular</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/26806283','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/26806283"><span>Electrochemical hydrogen <span class="hlt">sulfide</span> biosensors.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Xu, Tailin; Scafa, Nikki; Xu, Li-Ping; Zhou, Shufeng; Abdullah Al-Ghanem, Khalid; Mahboob, Shahid; Fugetsu, Bunshi; Zhang, Xueji</p> <p>2016-02-21</p> <p>The measurement of <span class="hlt">sulfide</span>, especially hydrogen <span class="hlt">sulfide</span>, has held the attention of the analytical community due to its unique physiological and pathophysiological roles in biological systems. Electrochemical detection offers a rapid, highly sensitive, affordable, simple, and real-time technique to measure hydrogen <span class="hlt">sulfide</span> concentration, which has been a well-documented and reliable method. This review details up-to-date research on the electrochemical detection of hydrogen <span class="hlt">sulfide</span> (ion selective electrodes, polarographic hydrogen <span class="hlt">sulfide</span> sensors, etc.) in biological samples for potential therapeutic use.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2013MinDe..48..193K','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2013MinDe..48..193K"><span><span class="hlt">Sulfide</span>-associated mineral assemblages in the Bushveld Complex, South Africa: platinum-group element enrichment by vapor refining by chloride-carbonate fluids</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Kanitpanyacharoen, W.; Boudreau, A. E.</p> <p>2013-02-01</p> <p>The petrology of <span class="hlt">base</span> <span class="hlt">metal</span> <span class="hlt">sulfides</span> and associated accessory minerals in rocks away from economically significant ore zones such as the Merensky Reef of the Bushveld Complex has previously received only scant attention, yet this information is critical in the evaluation of models for the formation of Bushveld-type platinum-group element (PGE) deposits. Trace <span class="hlt">sulfide</span> minerals, primarily pyrite, pyrrhotite, pentlandite, and chalcopyrite are generally less than 100 microns in size, and occur as disseminated interstitial individual grains, as polyphase assemblages, and less commonly as inclusions in pyroxene, plagioclase, and olivine. Pyrite after pyrrhotite is commonly associated with low temperature greenschist alteration haloes around <span class="hlt">sulfide</span> grains. Pyrrhotite hosted by Cr- and Ti-poor magnetite (Fe3O4) occurs in several samples from the Marginal to Lower Critical Zones below the platiniferous Merensky Reef. These grains occur with calcite that is in textural equilibrium with the igneous silicate minerals, occur with Cl-rich apatite, and are interpreted as resulting from high temperature sulfur loss during degassing of interstitial liquid. A quantitative model demonstrates how many of the first-order features of the Bushveld ore <span class="hlt">metal</span> distribution could have developed by vapor refining of the crystal pile by chloride-carbonate-rich fluids during which sulfur and <span class="hlt">sulfide</span> are continuously recycled, with sulfur moving from the interior of the crystal pile to the top during vapor degassing.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/26852506','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/26852506"><span>[The toxic complications of hydrogen <span class="hlt">sulfide-based</span> balneotherapy in the spa and health resort practice].</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Khodasevich, L S</p> <p>2015-01-01</p> <p>The present literature review was designed to consider the toxic complications of hydrogen <span class="hlt">sulfide-based</span> balneotherapy encountered in the spa and health resort practice that should actually be regarded as hydrogen <span class="hlt">sulfide</span> intoxication taking into consideration that their severity depends on the route through which the toxicant enters the body, its concentration in the therapeutic bath, and the overall duration of balneotherapy. Although such complications rarely occur in everyday practice, they may constitute a threat to the patient's health which implies the necessity of adequate measures for their prevention.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/21822114','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/21822114"><span>Cost effectiveness of drug-eluting stents as compared with bare <span class="hlt">metal</span> stents in patients with coronary artery disease.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Wisløff, Torbjørn; Atar, Dan; Sønbø Kristiansen, Ivar</p> <p>2013-01-01</p> <p>The aim of this study was to estimate the incremental cost effectiveness of replacing bare <span class="hlt">metal</span> stents (<span class="hlt">BMS</span>) by drug-eluting stents (DES) when using trial data and registry data. We developed a Markov model (model of cost effectiveness of coronary artery disease) in which 60-year-old patients started by undergoing percutaneous coronary intervention for acute or subacute coronary artery disease. The patients are followed until death or 100 years of age. Data on the occurrence of events (revascularization, acute myocardial infarction, and death) were <span class="hlt">based</span> on Scandinavian registry data. Separate analyses were conducted with data on effectiveness <span class="hlt">based</span> on randomized controlled trials and patient registries. On using trial data, it was found that sirolimus-eluting stents (SES) yield 0.003 greater life expectancy and $3300 lower costs than do <span class="hlt">BMS</span> (dominant strategy). Paclitaxel-eluting stents (PES) yield 0.148 more life years than do SES at additional lifetime costs of $2800 ($21,400 per life year gained). On using registry data, the cost per life year gained was found to be $4900 when replacing <span class="hlt">BMS</span> with DES. Probabilistic sensitivity analyses, on the other hand, indicate that PES only has a 50%-75% probability of being cost effective, regardless of the type of effectiveness data. DESs are cost effective with current willingness to pay for life year gains. Whether PES or SES is the most effective DES remains uncertain.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4804850','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4804850"><span>Drug-Eluting Stents versus Bare-<span class="hlt">Metal</span> Stents in Taiwanese Patients with Acute Coronary Syndrome: An Outcome Report of a Multicenter Registry</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Lai, Chi-Cheng; Yip, Hon-Kan; Lin, Tsung-Hsien; Wu, Chiung-Jen; Lai, Wen-Ter; Liu, Chun-Peng; Chang, Shu-Chen; Mar, Guang-Yuan</p> <p>2014-01-01</p> <p>Background The study aims to compare cardiovascular outcomes of using bare-<span class="hlt">metal</span> stents (<span class="hlt">BMS</span>) and drug-eluting stents (DES) in patients with acute coronary syndrome (ACS) through analysis of the database from the Taiwan ACS registry. Large domestic studies comparing outcomes of interventional strategies using DES and <span class="hlt">BMS</span> in a Taiwanese population with ACS are limited. Methods and Results Collected data regarding characteristics and cardiovascular outcomes from the registry database were compared between the <span class="hlt">BMS</span> and DES groups. A Cox regression model was used in an unadjusted or adjusted manner for analysis. Baseline characteristics apparently varied between DES group (n = 650) and <span class="hlt">BMS</span> group (n = 1672) such as ACS types, Killip’s classifications, or coronary blood flows. Compared with the <span class="hlt">BMS</span> group, the DES group was associated with significantly lower cumulative incidence of all-cause mortality (3.4% vs. 5.8%, p = 0.008), target vessel revascularization (TVR) (5.2% vs. 7.4%, p = 0.035), or major adverse cardiac events (MACE) (10.2% vs. 15.6%, p < 0.001) at 1 year in a real-world setting. Cox regression analysis showed the <span class="hlt">BMS</span> group referenced as the DES group had significantly higher risk-adjusted total mortality [hazard ratio (HR) = 1.85, p = 0.026], target vessel revascularization (TVR) (HR = 1.59, p = 0.035), and MACE (HR = 1.68, p = 0.001). Conclusions The data show use of DES over <span class="hlt">BMS</span> provided advantages to patients with ACS in terms of lower 1-year mortality, TVR, and MACE. The study suggests implantation of DES compared with <span class="hlt">BMS</span> in Taiwanese patients with ACS is safe and beneficial in the real-world setting. PMID:27122834</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4068419','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4068419"><span>Randomized, Placebo-Controlled, Single-Ascending-Dose Study of <span class="hlt">BMS</span>-791325, a Hepatitis C Virus (HCV) NS5B Polymerase Inhibitor, in HCV Genotype 1 Infection</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Lemm, Julie; Eley, Timothy; Liu, Menping; Berglind, Anna; Sherman, Diane; Lawitz, Eric; Vutikullird, Apinya B.; Tebas, Pablo; Gao, Min; Pasquinelli, Claudio; Grasela, Dennis M.</p> <p>2014-01-01</p> <p><span class="hlt">BMS</span>-791325 is a nonnucleoside inhibitor of hepatitis C virus (HCV) NS5B polymerase with low-nanomolar potency against genotypes 1a (50% effective concentration [EC50], 3 nM) and 1b (EC50, 7 nM) in vitro. <span class="hlt">BMS</span>-791325 safety, pharmacokinetics, and antiviral activity were evaluated in a double-blind, placebo-controlled, single-ascending-dose study in 24 patients (interferon naive and experienced) with chronic HCV genotype 1 infection, randomized (5:1) to receive a single dose of <span class="hlt">BMS</span>-791325 (100, 300, 600, or 900 mg) or placebo. The prevalence and phenotype of HCV variants at baseline and specific posttreatment time points were assessed. Antiviral activity was observed in all cohorts, with a mean HCV RNA decline of ≈2.5 log10 copies/ml observed 24 h after a single 300-mg dose. Mean plasma half-life among cohorts was 7 to 9 h; individual 24-hour levels exceeded the protein-adjusted EC90 for genotype 1 at all doses. <span class="hlt">BMS</span>-791325 was generally well tolerated, with no serious adverse events or discontinuations. Enrichment for resistance variants was not observed at 100 to 600 mg. At 900 mg, variants (P495L/S) associated with <span class="hlt">BMS</span>-791325 resistance in vitro were transiently observed in one patient, concurrent with an observed HCV RNA decline of 3.4 log10 IU/ml, but were replaced with wild type by 48 h. Single doses of <span class="hlt">BMS</span>-791325 were well tolerated; demonstrated rapid, substantial, and exposure-related antiviral activity; displayed dose-related increases in exposure; and showed viral kinetic and pharmacokinetic profiles supportive of once- or twice-daily dosing. These results support its further development in combination with other direct-acting antivirals for HCV genotype 1 infection. (This trial has been registered at ClinicalTrials.gov under registration no. NCT00664625.) PMID:24733462</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/17615684','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/17615684"><span>Cardioprotective effects of <span class="hlt">BMS</span>-180448, a prototype mitoK(ATP) channel opener, and the role of salvage kinases, in the rat model of global ischemia and reperfusion heart injury.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Lee, Ju-Han; Jung, In-Sang; Lee, Sung-Hun; Yang, Min-Kyu; Hwang, Ji-Hye; Lee, Hak-Dong; Cho, Yu-Sun; Song, Min-Jin; Yi, Kyu-Yang; Yoo, Sung-Eun; Kwon, Suk-Hyung; Kim, Bokyung; Lee, Chang-Soo; Shin, Hwa-Sup</p> <p>2007-05-01</p> <p>To investigate the involvement of reperfusion-induced salvage kinases (RISK) as possible signaling molecules for the cardioprotective effects of <span class="hlt">BMS</span>-180448, a prototype mitochondrial ATP-sensitive K+ (mitoK(ATP)) channel opener, we measured its cardioprotective effects in a rat model of ischemia/reperfusion (I/R) heart injury, together with western blotting analysis of five different signaling proteins. In isolated rat hearts subjected to 30-min global ischemia followed by 30-min reperfusion, <span class="hlt">BMS</span>-180448 (1, 3 and 10 microM) significantly increased reperfusion left ventricular developed pressure (LVDP) and 30-min reperfusion double product (heart rate x LVDP) in a concentration-dependent manner, while decreasing left ventricular end-diastolic pressure (LVEDP) throughout reperfusion period in a concentration-dependent manner. SDS-PAGE/western blotting analysis of left ventricle reperfused for 30 min revealed that <span class="hlt">BMS</span>-180448 significantly decreased phospho-GSK3beta at high concentration, whereas it tended to increase slightly phospho-eNOS and phospho-p70S6K with concentration. However, <span class="hlt">BMS</span>-180448 had no effect on phospho-Akt and phospho-Bad. These results suggest that the cardioprotective effects of <span class="hlt">BMS</span>-180448 against I/R heart injury may result from direct activation of mitoK(ATP) channel in cardiomyocytes, with the minimal role of RISK pathway in the activation of this channel and the cardioprotective effects of <span class="hlt">BMS</span>-180448.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/servlets/purl/868376','DOE-PATENT-XML'); return false;" href="https://www.osti.gov/servlets/purl/868376"><span>Cadmium <span class="hlt">sulfide</span> membranes</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Spanhel, Lubomir; Anderson, Marc A.</p> <p>1992-07-07</p> <p>A method is described for the creation of novel q-effect cadmium <span class="hlt">sulfide</span> membranes. The membranes are made by first creating a dilute cadmium <span class="hlt">sulfide</span> colloid in aqueous suspension and then removing the water and excess salts therefrom. The cadmium <span class="hlt">sulfide</span> membrane thus produced is luminescent at room temperature and may have application in laser fabrication.</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_15");'>15</a></li> <li><a href="#" onclick='return showDiv("page_16");'>16</a></li> <li class="active"><span>17</span></li> <li><a href="#" onclick='return showDiv("page_18");'>18</a></li> <li><a href="#" onclick='return showDiv("page_19");'>19</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_17 --> <div id="page_18" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_16");'>16</a></li> <li><a href="#" onclick='return showDiv("page_17");'>17</a></li> <li class="active"><span>18</span></li> <li><a href="#" onclick='return showDiv("page_19");'>19</a></li> <li><a href="#" onclick='return showDiv("page_20");'>20</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="341"> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/servlets/purl/868034','DOE-PATENT-XML'); return false;" href="https://www.osti.gov/servlets/purl/868034"><span>Cadmium <span class="hlt">sulfide</span> membranes</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Spanhel, Lubomir; Anderson, Marc A.</p> <p>1991-10-22</p> <p>A method is described for the creation of novel q-effect cadmium <span class="hlt">sulfide</span> membranes. The membranes are made by first creating a dilute cadmium <span class="hlt">sulfide</span> colloid in aqueous suspension and then removing the water and excess salts therefrom. The cadmium <span class="hlt">sulfide</span> membrane thus produced is luminescent at room temperature and may have application in laser fabrication.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/27090171','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/27090171"><span>Identification and Characterization of <span class="hlt">BMS</span>-955176, a Second-Generation HIV-1 Maturation Inhibitor with Improved Potency, Antiviral Spectrum, and Gag Polymorphic Coverage.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Nowicka-Sans, Beata; Protack, Tricia; Lin, Zeyu; Li, Zhufang; Zhang, Sharon; Sun, Yongnian; Samanta, Himadri; Terry, Brian; Liu, Zheng; Chen, Yan; Sin, Ny; Sit, Sing-Yuen; Swidorski, Jacob J; Chen, Jie; Venables, Brian L; Healy, Matthew; Meanwell, Nicholas A; Cockett, Mark; Hanumegowda, Umesh; Regueiro-Ren, Alicia; Krystal, Mark; Dicker, Ira B</p> <p>2016-07-01</p> <p><span class="hlt">BMS</span>-955176 is a second-generation human immunodeficiency virus type 1 (HIV-1) maturation inhibitor (MI). A first-generation MI, bevirimat, showed clinical efficacy in early-phase studies, but ∼50% of subjects had viruses with reduced susceptibility associated with naturally occurring polymorphisms in Gag near the site of MI action. MI potency was optimized using a panel of engineered reporter viruses containing site-directed polymorphic changes in Gag that reduce susceptibility to bevirimat (including V362I, V370A/M/Δ, and T371A/Δ), leading incrementally to the identification of <span class="hlt">BMS</span>-955176. <span class="hlt">BMS</span>-955176 exhibits potent activity (50% effective concentration [EC50], 3.9 ± 3.4 nM [mean ± standard deviation]) toward a library (n = 87) of gag/pr recombinant viruses representing 96.5% of subtype B polymorphic Gag diversity near the CA/SP1 cleavage site. <span class="hlt">BMS</span>-955176 exhibited a median EC50 of 21 nM toward a library of subtype B clinical isolates assayed in peripheral blood mononuclear cells (PBMCs). Potent activity was maintained against a panel of reverse transcriptase, protease, and integrase inhibitor-resistant viruses, with EC50s similar to those for the wild-type virus. A 5.4-fold reduction in EC50 occurred in the presence of 40% human serum plus 27 mg/ml of human serum albumin (HSA), which corresponded well to an in vitro measurement of 86% human serum binding. Time-of-addition and pseudotype reporter virus studies confirm a mechanism of action for the compound that occurs late in the virus replication cycle. <span class="hlt">BMS</span>-955176 inhibits HIV-1 protease cleavage at the CA/SP1 junction within Gag in virus-like particles (VLPs) and in HIV-1-infected cells, and it binds reversibly and with high affinity to assembled Gag in purified HIV-1 VLPs. Finally, in vitro combination studies showed no antagonistic interactions with representative antiretrovirals (ARVs) of other mechanistic classes. In conclusion, <span class="hlt">BMS</span>-955176 is a second-generation MI with potent in vitro anti-HIV-1</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2018CoMP..173...19Z','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2018CoMP..173...19Z"><span>An experimental study of Fe-Ni exchange between <span class="hlt">sulfide</span> melt and olivine at upper mantle conditions: implications for mantle <span class="hlt">sulfide</span> compositions and phase equilibria</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Zhang, Zhou; von der Handt, Anette; Hirschmann, Marc M.</p> <p>2018-03-01</p> <p> attributable to differences in temperature and pressure between experimental studies. It may be related in part to the effects of <span class="hlt">metal</span>/sulfur ratio in <span class="hlt">sulfide</span> melt. Application of these results to the composition of molten <span class="hlt">sulfide</span> in peridotite indicates that compositions are intermediate in composition (X_{{{Ni}}}^{{{<span class="hlt">sulfide</span>}}} 0.4-0.6) in the shallow mantle at 50 km, becomes more Ni rich with depth as the O content of the melt diminishes, reaching a maximum (0.6-0.7) at depths near 80-120 km, and then becomes more Fe rich in the deeper mantle where conditions are more reduced, approaching (X_{{{Ni}}}^{{{<span class="hlt">sulfide</span>}}} 0.28) > 140 km depth. Because Ni-rich <span class="hlt">sulfide</span> in the shallow upper mantle melts at lower temperature than more Fe-rich compositions, mantle <span class="hlt">sulfide</span> is likely molten in much of the deep continental lithosphere, including regions of diamond formation.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/25576273','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/25576273"><span>Primary endpoint results of the OMEGA Study: One-year clinical outcomes after implantation of a novel platinum chromium bare <span class="hlt">metal</span> stent.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Wang, John C; Carrié, Didier; Masotti, Monica; Erglis, Andrejs; Mego, David; Watkins, Matthew W; Underwood, Paul; Allocco, Dominic J; Hamm, Christian W</p> <p>2015-03-01</p> <p>Bare <span class="hlt">metal</span> stents (<span class="hlt">BMS</span>) have similar rates of death and myocardial infarction (MI) compared to drug-eluting stents (DES). DES lower repeat revascularization rates compared to <span class="hlt">BMS</span>, but may have higher rates of late stent thrombosis (ST) potentially due to impaired endothelialization requiring longer dual anti-platelet therapy (DAPT). OMEGA evaluated a novel <span class="hlt">BMS</span> designed to have improved deliverability and radiopacity, in comparison to currently available platforms. OMEGA was a prospective, multicenter, single-arm study enrolling 328 patients at 37 sites (US and Europe). Patients received the OMEGA stent (bare platinum chromium element stent) for the treatment of de novo native coronary artery lesions (≤28 mm long; diameter ≥2.25 mm to ≤4.50mm). The primary endpoint was 9-month target lesion failure (TLF: cardiac death, target vessel-related MI, target lesion revascularization [TLR]) compared to a prespecified performance goal (PG) <span class="hlt">based</span> on prior generation <span class="hlt">BMS</span>. All major cardiac events were independently adjudicated. DAPT was required for a minimum of 1 month post procedure. In the OMEGA study, the mean age was 65; 17% had diabetes mellitus. The primary endpoint was met; 9 month TLF rate was 11.5%, and the upper 1-sided 95% confidence bound of 14.79% was less than the prespecified PG of 21.2% (p<0.0001). One-year event rates were low including a TLF rate of 12.8% and an ST rate of 0.6% at 12 months. One-year outcomes of OMEGA show low rates of TLF, revascularization and ST. This supports safety and efficacy of the OMEGA <span class="hlt">BMS</span> for the treatment of coronary artery disease. Copyright © 2015 Elsevier Inc. All rights reserved.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/biblio/21251609-synthesis-black-red-mercury-sulfide-nano-powder-traditional-indian-method-biomedical-application','SCIGOV-STC'); return false;" href="https://www.osti.gov/biblio/21251609-synthesis-black-red-mercury-sulfide-nano-powder-traditional-indian-method-biomedical-application"><span>Synthesis of Black and Red Mercury <span class="hlt">Sulfide</span> Nano-Powder by Traditional Indian Method for Biomedical Application</span></a></p> <p><a target="_blank" href="http://www.osti.gov/search">DOE Office of Scientific and Technical Information (OSTI.GOV)</a></p> <p>Padhi, Payodhar; Sahoo, G.; Das, K.</p> <p></p> <p>The use of <span class="hlt">metals</span> and minerals in the traditional Indian system of medicine known as aired is very common and is practiced since seventh century B.C. <span class="hlt">Metals</span> were reduced to calcined powder form for medicinal purpose. For detoxification, a further step of purification of the <span class="hlt">metals</span> and minerals with different vegetable extracts was practiced. The people of East India were using mercury and its <span class="hlt">sulfide</span> as medicine. Gradually this secret was leaked to Arabic physicians who used mercury in skin ointment. Subsequently Italian Physicians adopted Arabic prescriptions of mercurial ointments for skin diseases. In the olden days, <span class="hlt">metals</span> and mineralsmore » were impregnated with decoction and juice of vegetables and animal products like milk and fat for purification. These were then reduced to fine particles by milling with a pestle and mortar. It was known by then that the fineness of the powder had a significant influence on the color, texture, and medicinal properties as is cited by Charak. Nagarjun studied in detail the processing of <span class="hlt">metals</span> and minerals, particularly mercury and the influence of the processing parameters on the medicinal values. Mercury is unique in many aspects. Indian alchemy developed a wide variety a chemical processes for the ostensible transmutation of <span class="hlt">metals</span> and preparation of elixir of life, in which mercury occupied a prime position .The present investigation attempts to use the traditional methods as prescribed in the ancient texts to prepare mercury <span class="hlt">sulfide</span> in both red and black form for medicinal use. XRD, SEM and HRTEM investigations of the <span class="hlt">sulfides</span> obtained shows that the ancient Indians were able to produce nano-sized powders. Possibly this may be taken as the earliest application of the production and use of nano powder. The study proves that even in ancient time the knowledge of nano particle synthesis was prevalent and used to enhance effectiveness of medicines. Further mercury in the free form is not acceptable in medicines. The</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2008AIPC.1063..431P','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2008AIPC.1063..431P"><span>Synthesis of Black and Red Mercury <span class="hlt">Sulfide</span> Nano-Powder by Traditional Indian Method for Biomedical Application</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Padhi, Payodhar; Sahoo, G.; Das, K.; Ghosh, Sudipto; Panigrahi, S. C.</p> <p>2008-10-01</p> <p>The use of <span class="hlt">metals</span> and minerals in the traditional Indian system of medicine known as aired is very common and is practiced since seventh century B.C. <span class="hlt">Metals</span> were reduced to calcined powder form for medicinal purpose. For detoxification, a further step of purification of the <span class="hlt">metals</span> and minerals with different vegetable extracts was practiced. The people of East India were using mercury and its <span class="hlt">sulfide</span> as medicine. Gradually this secret was leaked to Arabic physicians who used mercury in skin ointment. Subsequently Italian Physicians adopted Arabic prescriptions of mercurial ointments for skin diseases. In the olden days, <span class="hlt">metals</span> and minerals were impregnated with decoction and juice of vegetables and animal products like milk and fat for purification. These were then reduced to fine particles by milling with a pestle and mortar. It was known by then that the fineness of the powder had a significant influence on the color, texture, and medicinal properties as is cited by Charak. Nagarjun studied in detail the processing of <span class="hlt">metals</span> and minerals, particularly mercury and the influence of the processing parameters on the medicinal values. Mercury is unique in many aspects. Indian alchemy developed a wide variety a chemical processes for the ostensible transmutation of <span class="hlt">metals</span> and preparation of elixir of life, in which mercury occupied a prime position .The present investigation attempts to use the traditional methods as prescribed in the ancient texts to prepare mercury <span class="hlt">sulfide</span> in both red and black form for medicinal use. XRD, SEM and HRTEM investigations of the <span class="hlt">sulfides</span> obtained shows that the ancient Indians were able to produce nano-sized powders. Possibly this may be taken as the earliest application of the production and use of nano powder. The study proves that even in ancient time the knowledge of nano particle synthesis was prevalent and used to enhance effectiveness of medicines. Further mercury in the free form is not acceptable in medicines. The ancient</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2016AGUFM.B51A0382G','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2016AGUFM.B51A0382G"><span>Particle Geochemistry of Hydrothermal Systems and Implications for Mining Seafloor Massive <span class="hlt">Sulfides</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Gartman, A.; Hein, J. R.</p> <p>2016-12-01</p> <p>Seafloor massive <span class="hlt">sulfide</span> deposits form due to high-temperature hydrothermal venting that occurs globally, in every ocean basin, along plate boundaries and intra-plate hotspots. At these sites, the rapid mixing of hot, <span class="hlt">metal</span>- and sulfur-rich reduced fluids into cold, oxygenated ocean water results in abundant mineral precipitation. The mining of seafloor massive <span class="hlt">sulfides</span> is likely to occur in the near future and will generate a new class of mainly inorganic particulates, different from those formed in hydrothermal `black smoke.' While the major components of both black smoke & SMS tailings are Cu, Fe and Zn <span class="hlt">sulfides</span>, many other minerals, including those containing technology critical elements, especially tellurium, are present. A comparison of these two classes of particulates will be presented, including chemical composition and reactivity to oxidative dissolution.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/17640800','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/17640800"><span>Evaluation of feed COD/sulfate ratio as a control criterion for the biological hydrogen <span class="hlt">sulfide</span> production and lead precipitation.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Velasco, Antonio; Ramírez, Martha; Volke-Sepúlveda, Tania; González-Sánchez, Armando; Revah, Sergio</p> <p>2008-03-01</p> <p>The ability of sulfate-reducing bacteria to produce hydrogen <span class="hlt">sulfide</span> and the high affinity of <span class="hlt">sulfide</span> to react with divalent <span class="hlt">metallic</span> cations represent an excellent option to remove heavy <span class="hlt">metals</span> from wastewater. Different parameters have been proposed to control the hydrogen <span class="hlt">sulfide</span> production by anaerobic bacteria, such as the organic and sulfate loading rates and the feed COD/SO4(2-) ratio. This work relates the feed COD/SO4(2-) ratio with the hydrogen <span class="hlt">sulfide</span> production and dissolved lead precipitation, using ethanol as carbon and energy source in an up-flow anaerobic sludge blanket reactor. A maximum dissolved <span class="hlt">sulfide</span> concentration of 470+/-7 mg S/L was obtained at a feed COD/SO4(2-) ratio of 2.5, with sulfate and ethanol conversions of approximately 94 and 87%, respectively. The lowest dissolved <span class="hlt">sulfide</span> concentration (145+/-10 mg S/L) was observed with a feed COD/SO4(2-) ratio of 0.67. Substantial amounts of acetate (510-1730 mg/L) were produced and accumulated in the bioreactor from ethanol oxidation. Although only incomplete oxidation of ethanol to acetate was observed, the consortium was able to remove 99% of the dissolved lead (200 mg/L) with a feed COD/SO4(2-) ratio of 1.5. It was found that the feed COD/SO4(2-) ratio could be an adequate parameter to control the hydrogen <span class="hlt">sulfide</span> production and the consequent precipitation of dissolved lead.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2018MinDe.tmp....8G','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2018MinDe.tmp....8G"><span>Results of LA-ICP-MS <span class="hlt">sulfide</span> mapping from Algoma-type BIF gold systems with implications for the nature of mineralizing fluids, <span class="hlt">metal</span> sources, and deposit models</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Gourcerol, B.; Kontak, D. J.; Thurston, P. C.; Petrus, J. A.</p> <p>2018-01-01</p> <p>Quantitative laser ablation inductively coupled plasma-mass spectrometry (LA-ICP-MS) element distribution maps combined with traverse mode analyses have been acquired on various <span class="hlt">sulfides</span> (pyrite, pyrrhotite, arsenopyrite) from three Canadian Algoma-type BIF-hosted gold deposits ( 4 Moz Au Meadowbank, ≥ 2.8 Moz Au Meliadine district, 6 Moz Au Musselwhite). These data, in conjunction with detailed petrographic and SEM-EDS observations, provide insight into the nature and relative timing of gold events, the presence and implication of trace element zoning regarding crystallization processes, and elemental associations that fingerprint gold events. Furthermore, the use of an innovative method of processing the LA-ICP-MS data in map and traverse modes, whereby the results are fragmented into time-slice data, to generate various binary plots (Ag versus Ni) provides a means to identify elemental associations (Te, Bi) not otherwise apparent. This integrated means of treating geochemical data, along with petrography, allows multiple gold events and remobilization processes to be recognized and their elemental associations determined. The main gold event in each of these deposits is characterized by the coupling of an As-Se-Te-Ag element association coincident with intense stratabound <span class="hlt">sulfide</span>-replacement of the Fe-rich host rock. Additionally, the data indicate presence of a later remobilization event, which upgraded the Au tenor, as either non-refractory or refractory type, along fracture networks due to the ingress of subsequent <span class="hlt">base</span> <span class="hlt">metal</span>-bearing metamorphic fluids (mainly a Pb-Bi association). Furthermore, the data reveal a stratigraphic influence, as reflected in the elemental associations and the elemental enrichments observed and the nature of the <span class="hlt">sulfide</span> phase hosting the gold mineralization (arsenopyrite versus pyrite).</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4599011','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4599011"><span>Transient Kinetic Analysis of Hydrogen <span class="hlt">Sulfide</span> Oxidation Catalyzed by Human <span class="hlt">Sulfide</span> Quinone Oxidoreductase*</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Mishanina, Tatiana V.; Yadav, Pramod K.; Ballou, David P.; Banerjee, Ruma</p> <p>2015-01-01</p> <p>The first step in the mitochondrial <span class="hlt">sulfide</span> oxidation pathway is catalyzed by <span class="hlt">sulfide</span> quinone oxidoreductase (SQR), which belongs to the family of flavoprotein disulfide oxidoreductases. During the catalytic cycle, the flavin cofactor is intermittently reduced by <span class="hlt">sulfide</span> and oxidized by ubiquinone, linking H2S oxidation to the electron transfer chain and to energy metabolism. Human SQR can use multiple thiophilic acceptors, including <span class="hlt">sulfide</span>, sulfite, and glutathione, to form as products, hydrodisulfide, thiosulfate, and glutathione persulfide, respectively. In this study, we have used transient kinetics to examine the mechanism of the flavin reductive half-reaction and have determined the redox potential of the bound flavin to be −123 ± 7 mV. We observe formation of an unusually intense charge-transfer (CT) complex when the enzyme is exposed to <span class="hlt">sulfide</span> and unexpectedly, when it is exposed to sulfite. In the canonical reaction, <span class="hlt">sulfide</span> serves as the sulfur donor and sulfite serves as the acceptor, forming thiosulfate. We show that thiosulfate is also formed when <span class="hlt">sulfide</span> is added to the sulfite-induced CT intermediate, representing a new mechanism for thiosulfate formation. The CT complex is formed at a kinetically competent rate by reaction with <span class="hlt">sulfide</span> but not with sulfite. Our study indicates that <span class="hlt">sulfide</span> addition to the active site disulfide is preferred under normal turnover conditions. However, under pathological conditions when sulfite concentrations are high, sulfite could compete with <span class="hlt">sulfide</span> for addition to the active site disulfide, leading to attenuation of SQR activity and to an alternate route for thiosulfate formation. PMID:26318450</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/26318450','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/26318450"><span>Transient Kinetic Analysis of Hydrogen <span class="hlt">Sulfide</span> Oxidation Catalyzed by Human <span class="hlt">Sulfide</span> Quinone Oxidoreductase.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Mishanina, Tatiana V; Yadav, Pramod K; Ballou, David P; Banerjee, Ruma</p> <p>2015-10-09</p> <p>The first step in the mitochondrial <span class="hlt">sulfide</span> oxidation pathway is catalyzed by <span class="hlt">sulfide</span> quinone oxidoreductase (SQR), which belongs to the family of flavoprotein disulfide oxidoreductases. During the catalytic cycle, the flavin cofactor is intermittently reduced by <span class="hlt">sulfide</span> and oxidized by ubiquinone, linking H2S oxidation to the electron transfer chain and to energy metabolism. Human SQR can use multiple thiophilic acceptors, including <span class="hlt">sulfide</span>, sulfite, and glutathione, to form as products, hydrodisulfide, thiosulfate, and glutathione persulfide, respectively. In this study, we have used transient kinetics to examine the mechanism of the flavin reductive half-reaction and have determined the redox potential of the bound flavin to be -123 ± 7 mV. We observe formation of an unusually intense charge-transfer (CT) complex when the enzyme is exposed to <span class="hlt">sulfide</span> and unexpectedly, when it is exposed to sulfite. In the canonical reaction, <span class="hlt">sulfide</span> serves as the sulfur donor and sulfite serves as the acceptor, forming thiosulfate. We show that thiosulfate is also formed when <span class="hlt">sulfide</span> is added to the sulfite-induced CT intermediate, representing a new mechanism for thiosulfate formation. The CT complex is formed at a kinetically competent rate by reaction with <span class="hlt">sulfide</span> but not with sulfite. Our study indicates that <span class="hlt">sulfide</span> addition to the active site disulfide is preferred under normal turnover conditions. However, under pathological conditions when sulfite concentrations are high, sulfite could compete with <span class="hlt">sulfide</span> for addition to the active site disulfide, leading to attenuation of SQR activity and to an alternate route for thiosulfate formation. © 2015 by The American Society for Biochemistry and Molecular Biology, Inc.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/26512669','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/26512669"><span>Why does the Conductivity of a Nickel Catalyst Increase during <span class="hlt">Sulfidation</span>? An Exemplary Study Using an In Operando Sensor Device.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Fremerey, Peter; Jess, Andreas; Moos, Ralf</p> <p>2015-10-23</p> <p>In order to study the <span class="hlt">sulfidation</span> of a catalyst fixed bed, an in operando single pellet sensor was designed. A catalyst pellet from the fixed bed was electrically contacted and its electrical response was correlated with the catalyst behavior. For the <span class="hlt">sulfidation</span> tests, a nickel catalyst was used and was <span class="hlt">sulfidized</span> with H₂S. This catalyst had a very low conductivity in the reduced state. During <span class="hlt">sulfidation</span>, the conductivity of the catalyst increased by decades. A reaction from nickel to nickel <span class="hlt">sulfide</span> occurred. This conductivity increase by decades during <span class="hlt">sulfidation</span> had not been expected since both nickel and nickel <span class="hlt">sulfides</span> behave <span class="hlt">metallic</span>. Only by assuming a percolation phenomenon that originates from a volume increase of the nickel contacts when reacting to nickel <span class="hlt">sulfides</span>, this effect can be explained. This assumption was supported by <span class="hlt">sulfidation</span> tests with differently nickel loaded catalysts and it was quantitatively estimated by a general effective media theory. The single pellet sensor device for in operando investigation of <span class="hlt">sulfidation</span> can be considered as a valuable tool to get further insights into catalysts under reaction conditions.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4634427','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4634427"><span>Why does the Conductivity of a Nickel Catalyst Increase during <span class="hlt">Sulfidation</span>? An Exemplary Study Using an In Operando Sensor Device</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Fremerey, Peter; Jess, Andreas; Moos, Ralf</p> <p>2015-01-01</p> <p>In order to study the <span class="hlt">sulfidation</span> of a catalyst fixed bed, an in operando single pellet sensor was designed. A catalyst pellet from the fixed bed was electrically contacted and its electrical response was correlated with the catalyst behavior. For the <span class="hlt">sulfidation</span> tests, a nickel catalyst was used and was <span class="hlt">sulfidized</span> with H2S. This catalyst had a very low conductivity in the reduced state. During <span class="hlt">sulfidation</span>, the conductivity of the catalyst increased by decades. A reaction from nickel to nickel <span class="hlt">sulfide</span> occurred. This conductivity increase by decades during <span class="hlt">sulfidation</span> had not been expected since both nickel and nickel <span class="hlt">sulfides</span> behave <span class="hlt">metallic</span>. Only by assuming a percolation phenomenon that originates from a volume increase of the nickel contacts when reacting to nickel <span class="hlt">sulfides</span>, this effect can be explained. This assumption was supported by <span class="hlt">sulfidation</span> tests with differently nickel loaded catalysts and it was quantitatively estimated by a general effective media theory. The single pellet sensor device for in operando investigation of <span class="hlt">sulfidation</span> can be considered as a valuable tool to get further insights into catalysts under reaction conditions. PMID:26512669</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2014EGUGA..1613576M','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2014EGUGA..1613576M"><span>Nitrogen release from forest soils containing <span class="hlt">sulfide</span>-bearing sediments</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Maileena Nieminen, Tiina; Merilä, Päivi; Ukonmaanaho, Liisa</p> <p>2014-05-01</p> <p>Soils containing sediments dominated by <span class="hlt">metal</span> <span class="hlt">sulfides</span> cause high acidity and release of heavy <span class="hlt">metals</span>, when excavated or drained, as the aeration of these sediments causes formation of sulfuric acid. Consequent leaching of acidity and heavy <span class="hlt">metals</span> can kill tree seedlings and animals such as fish, contaminate water, and corrode concrete and steel. These types of soils are called acid sulfate soils. Their metamorphic equivalents, such as <span class="hlt">sulfide</span> rich black shales, pose a very similar risk of acidity and <span class="hlt">metal</span> release to the environment. Until today the main focus in treatment of the acid sulfate soils has been to prevent acidification and <span class="hlt">metal</span> toxicity to agricultural crop plants, and only limited attention has been paid to the environmental threat caused by the release of acidity and heavy <span class="hlt">metals</span> to the surrounding water courses. Even less attention is paid on release of major nutrients, such as nitrogen, although these sediments are extremely rich in carbon and nitrogen and present a potentially high microbiological activity. In Europe, the largest cover of acid sulfate soils is found in coastal lowlands of Finland. Estimates of acid sulfate soils in agricultural use range from 1 300 to 3 000 km2, but the area in other land use classes, such as managed peatland forests, is presumably larger. In Finland, 49 500 km2 of peatlands have been drained for forestry, and most of these peatland forests will be at the regeneration stage within 10 to 30 years. As ditch network maintenance is often a prerequisite for a successful establishment of the following tree generation, the effects of maintenance operations on the quality of drainage water should be under special control in peatlands underlain by <span class="hlt">sulfide</span>-bearing sediments. Therefore, identification of risk areas and effective prevention of acidity and <span class="hlt">metal</span> release during drain maintenance related soil excavating are great challenges for forestry on coastal lowlands of Finland. The organic and inorganic nitrogen</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://pubs.er.usgs.gov/publication/70025337','USGSPUBS'); return false;" href="https://pubs.er.usgs.gov/publication/70025337"><span>Weathering of <span class="hlt">sulfidic</span> shale and copper mine waste: Secondary minerals and <span class="hlt">metal</span> cycling in Great Smoky Mountains National Park, Tennessee, and North Carolina, USA</span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Hammarstrom, J.M.; Seal, R.R.; Meier, A.L.; Jackson, J.C.</p> <p>2003-01-01</p> <p><span class="hlt">Metal</span> cycling via physical and chemical weathering of discrete sources (copper mines) and regional (non-point) sources (<span class="hlt">sulfide</span>-rich shale) is evaluated by examining the mineralogy and chemistry of weathering products in Great Smoky Mountains National Park, Tennessee, and North Carolina, USA. The elements in copper mine waste, secondary minerals, stream sediments, and waters that are most likely to have negative impacts on aquatic ecosystems are aluminum, copper, zinc, and arsenic because these elements locally exceed toxicity guidelines for surface waters or for stream sediments. Acid-mine drainage has not developed in streams draining inactive copper mines. Acid-rock drainage and chemical weathering processes that accompany debris flows or human disturbances of <span class="hlt">sulfidic</span> rocks are comparable to processes that develop acid-mine drainage elsewhere. Despite the high rainfall in the mountain range, sheltered areas and intermittent dry spells provide local venues for development of secondary weathering products that can impact aquatic ecosystems.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2018MMTB..tmp..932A','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2018MMTB..tmp..932A"><span>Formation of Titanium <span class="hlt">Sulfide</span> from Titanium Oxycarbonitride by CS2 Gas</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Ahmadi, Eltefat; Yashima, Yuta; Suzuki, Ryosuke O.; Rezan, Sheikh Abdul</p> <p>2018-05-01</p> <p>Previously this group reported that a good quality titanium <span class="hlt">metal</span> powder can be produced from titanium <span class="hlt">sulfides</span> by electrochemical OS process. In this study, the sulfurization procedure was examined to synthesize titanium <span class="hlt">sulfide</span> from titanium oxycarbonitride by CS2 gas. The experiments were carried out in the temperature range of 1173 K to 1523 K (900 °C to 1250 °C) in a tube reactor with continuously flowing argon (Ar) as carrier gas of CS2. The formation of titanium <span class="hlt">sulfide</span> phases from the commercial TiN, TiC, and TiO powders was studied as the initial step. Then, TiO0.02C0.13N0.85 coming from ilmenite was sulfurized to prepare single phase of titanium <span class="hlt">sulfide</span>. The products were characterized by X-ray diffraction, and the morphology of the <span class="hlt">sulfides</span> was rigorously investigated, and the sulfur, oxygen, and carbon contents in the products were analyzed. The process was remarkably dependent on the temperature and time. TiN and TiO0.02C0.13N0.85 powders could be fully converted to the single phase of Ti2.45S4 (Ti2+x S4) at 1473 K (1200 °C) in 3.6 ks. The maximum weight gain of TiN sample was 55.3 pct indicating a full conversion of TiN to Ti2S3 phase. The carbon and oxygen contents in this <span class="hlt">sulfide</span> prepared from the oxycarbonitride were about 1.8 wt pct C and 1.4 wt pct O, respectively. Therefore, the titanium <span class="hlt">sulfide</span> could be a promising feedstock for the production of commercial grade titanium powder.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/26762988','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/26762988"><span>Efficacy, safety, bone and metabolic effects of HIV nucleoside reverse transcriptase inhibitor <span class="hlt">BMS</span>-986001 (AI467003): a phase 2b randomised, controlled, partly blinded trial.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Gupta, Samir K; McComsey, Grace A; Lombaard, John; Echevarría, Juan; Orrell, Catherine; Avihingsanon, Anchalee; Osiyemi, Olayemi; Santoscoy, Mario; Ray, Neelanjana; Stock, David A; Joshi, Samit R; Hanna, George J; Lataillade, Max</p> <p>2016-01-01</p> <p><span class="hlt">BMS</span>-986001 is a thymidine analogue nucleoside reverse transcriptase inhibitor (NRTI) designed to maintain in-vitro antiviral activity while minimising off-target effects. We assessed the efficacy and safety of <span class="hlt">BMS</span>-986001 versus tenofovir disoproxil fumarate in treatment-naive patients with HIV-1. In this phase 2b, randomised, active-controlled trial (AI467003), we recruited treatment-naive (no current or previous exposure to an antiretroviral drug for >1 week) adults (aged at least 18 years) with HIV-1 from 47 sites across Asia, Australia, Europe, North America, South Africa, and South America. Patients with plasma HIV-1 RNA greater than 5000 copies per mL and CD4 counts greater than 200 cells per μL were randomly assigned (2:2:2:3) to receive <span class="hlt">BMS</span>-986001 100 mg, 200 mg, or 400 mg once a day or to receive tenofovir disoproxil fumarate 300 mg once a day; each allocation was given with efavirenz 600 mg once a day and lamivudine 300 mg once a day. Both patients and investigators were masked to <span class="hlt">BMS</span>-986001 dose (achieved with similar looking placebo tablets), but not allocation up to and including week 48. The primary endpoints were the proportion of patients with plasma HIV-1 RNA less than 50 copies per mL and safety events (serious adverse events and adverse events leading to discontinuation) through week 24; the main analysis was with a modified intention-to-treat population. Resistance analysis was a secondary endpoint, and additional safety parameters were exploratory endpoints. This trial is registered with ClinicalTrials.gov, number NCT01489046, and the European Clinical Trials Database, number EudraCT 2011-003329-89. Patients were recruited between Jan 25, 2012, and Oct 3, 2012; 757 patients were assessed for eligibility and 301 were randomly assigned to receive either <span class="hlt">BMS</span>-986001 once a day (67 patients to 100 mg, 67 to 200 mg, and 66 to 400 mg) or tenofovir disoproxil fumarate (n=101). 297 patients received at least one dose of study drug. At week 24, 57 (88</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/23436124','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/23436124"><span>Geochemical and mineralogical characterization of a neutral, low-<span class="hlt">sulfide</span>/high-carbonate tailings impoundment, Markušovce, eastern Slovakia.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Hiller, Edgar; Petrák, Marián; Tóth, Roman; Lalinská-Voleková, Bronislava; Jurkovič, L'ubomír; Kučerová, Gabriela; Radková, Anežka; Sottník, Peter; Vozár, Jaroslav</p> <p>2013-11-01</p> <p> mineral assemblage and their occurrence follows the order: chalcopyrite > pyrite > tetrahedrite>arsenopyrite. The mineralogical composition of the tailings corresponds well to the primary mineralization mined. The neutralization capacity of the tailings is high, as confirmed by the values of neutralization potential to acid generation potential ratio, ranging from 6.7 to 63.9, and neutral to slightly alkaline pH of the tailings (paste pH 7.16-8.12) and the waters (pH 7.00-8.52). This is explained by abundant occurrence of carbonate minerals in the tailings, which readily neutralize the acidity generated by <span class="hlt">sulfide</span> oxidation. The total solid-phase concentrations of <span class="hlt">metal</span>(loid)s decrease as Cu>Sb>Hg>As and reflect the proportions of <span class="hlt">sulfides</span> present in the tailings. <span class="hlt">Sulfide</span> oxidation generally extends to a depth of 2 m. μ-XRD and EMPA were used to study secondary products developed on the surface of <span class="hlt">sulfide</span> minerals and within the tailings. The main secondary minerals identified are goethite and X-ray amorphous Fe oxyhydroxides and their occurrence decreases with increasing tailings depth. Secondary Fe phases are found as mineral coatings or individual grains and retain relatively high amounts of <span class="hlt">metal</span>(loid)s (up to 57.6 wt% Cu, 1.60 wt% Hg, 23.8 wt% As, and 2.37 wt% Sb). <span class="hlt">Based</span> on batch leaching tests and lysimeter results, the mobility of potentially toxic elements in the tailings is low. The limited mobility of <span class="hlt">metals</span> and metalloids is due to their retention by Fe oxyhydroxides and low solubilities of <span class="hlt">metal</span>(loid)-bearing <span class="hlt">sulfides</span>. The observations are consistent with PHREEQC calculations, which predict the precipitation of Fe oxyhydroxides as the main solubility-controlling mineral phases for As, Cu, Hg, and Sb. Waters discharging from tailings impoundment are characterized by a neutral to slightly alkaline pH (7.52-7.96) and low concentrations of dissolved <span class="hlt">metal</span>(loid)s (<5-7.0 μg/L Cu, <0.1-0.3 μg/L Hg, 5.0-16 μg/L As, and 5.0-43 μg/L Sb). Primary factors</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2002JPS...109....1J','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2002JPS...109....1J"><span>Development of battery management system for nickel-<span class="hlt">metal</span> hydride batteries in electric vehicle applications</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Jung, Do Yang; Lee, Baek Haeng; Kim, Sun Wook</p> <p></p> <p>Electric vehicle (EV) performance is very dependent on traction batteries. For developing electric vehicles with high performance and good reliability, the traction batteries have to be managed to obtain maximum performance under various operating conditions. Enhancement of battery performance can be accomplished by implementing a battery management system (<span class="hlt">BMS</span>) that plays an important role in optimizing the control mechanism of charge and discharge of the batteries as well as monitoring the battery status. In this study, a <span class="hlt">BMS</span> has been developed for maximizing the use of Ni-MH batteries in electric vehicles. This system performs several tasks: the control of charging and discharging, overcharge and over-discharge protection, the calculation and display of state-of-charge (SOC), safety, and thermal management. The <span class="hlt">BMS</span> is installed in and tested in a DEV5-5 electric vehicle developed by Daewoo Motor Co. and the Institute for Advanced Engineering in Korea. Eighteen modules of a Panasonic nickel-<span class="hlt">metal</span> hydride (Ni-MH) battery, 12 V, 95 A h, are used in the DEV5-5. High accuracy within a range of 3% and good reliability are obtained. The <span class="hlt">BMS</span> can also improve the performance and cycle-life of the Ni-MH battery peak, as well as the reliability and the safety of the electric vehicles.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/23326399','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/23326399"><span>Lesion length impacts long term outcomes of drug-eluting stents and bare <span class="hlt">metal</span> stents differently.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Chang, Shang-Hung; Chen, Chun-Chi; Hsieh, Ming-Jer; Wang, Chao-Yung; Lee, Cheng-Hung; Hsieh, I-Chang</p> <p>2013-01-01</p> <p>Long lesions have been associated with adverse outcomes in percutaneous coronary interventions with bare <span class="hlt">metal</span> stents (<span class="hlt">BMS</span>). However, the exact impact of lesion length on the short- and long-term outcomes of drug-eluting stent (DES) implantations is not as clear. This study compared the impact of lesion length on angiographic and clinical outcomes of <span class="hlt">BMS</span> and DES in a single-center prospective registry. Lesion length was divided into tertiles. The primary endpoints were angiographically defined binary in-stent restenosis (ISR) rate and major adverse cardiac event (MACE). Of the 4,312 de novo lesions in 3,447 consecutive patients in the CAPTAIN registry, 2,791 lesions (of 2,246 patients) received <span class="hlt">BMS</span>, and the remaining 1,521 lesions (of 1,201 patients) received DES. The mean follow-up duration was 4.5 years. The longer the lesion, the higher the ISR rate (14%, 18%, and 29%, p<0.001) and the lower the MACE-free survivals (p = 0.007) in the <span class="hlt">BMS</span> group. However, lesion length showed no such correlation with ISR rates (4.7%, 3.3%, and 7.8%, p = 0.67) or MACE-free survivals (p = 0.19) in the DES group. In our single-center prospective registry, lesion length defined in tertiles has no impact on the short-term (ISR) or long-term (MACE) outcomes of patients implanted with DES. In contrast, longer lesion correlates with higher ISR and MACE rates in <span class="hlt">BMS</span> group.</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_16");'>16</a></li> <li><a href="#" onclick='return showDiv("page_17");'>17</a></li> <li class="active"><span>18</span></li> <li><a href="#" onclick='return showDiv("page_19");'>19</a></li> <li><a href="#" onclick='return showDiv("page_20");'>20</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_18 --> <div id="page_19" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_17");'>17</a></li> <li><a href="#" onclick='return showDiv("page_18");'>18</a></li> <li class="active"><span>19</span></li> <li><a href="#" onclick='return showDiv("page_20");'>20</a></li> <li><a href="#" onclick='return showDiv("page_21");'>21</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="361"> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2014GeoOD..56..101B','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2014GeoOD..56..101B"><span>Localization of mineralization, its age, and relationship to magmatism at the Mogot silver-<span class="hlt">base-metal</span> deposit, North Stanovoi metallogenic zone in the southeastern framework of the North Asian Craton</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Buchko, I. V.; Buchko, Ir. V.; Sorokin, A. A.; Ponomarchuk, V. A.; Travin, A. V.</p> <p>2014-03-01</p> <p>The results of studying the Mogot silver-<span class="hlt">base-metal</span> deposit located in the Dzhugdzhur-Stanovoi Superterrane are discussed in this paper. The main ore-controlling structural elements of the studied district are near-latitudinal and NE-trending faults, which are accompanied by zones of hydrothermal metasomatic potassic, propylitic, and argillic alterations, breccias with quartz and quartz-carbonate cement replacing metamorphic rocks and granitoids of the Late Stanovoi Complex. The total <span class="hlt">sulfide</span> content in ore is 2-3%. The high Ag, Pb, and Zn contents in ore allow us to consider the Mogot deposit as silver-<span class="hlt">base-metal</span>, since except of orebody 4, there are no silver minerals proper. This indicates that silver is incorporated into crystalline lattice of <span class="hlt">sulfides</span>. The results of 40Ar/39Ar geochronological investigations show that the hydrothermal ore deposition dated at 127-125 Ma was related to emplacement of intrusions pertaining to the Tynda-Bakaran Complex.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/26341188','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/26341188"><span>Mechanisms and Patterns of Intravascular Ultrasound In-Stent Restenosis Among Bare <span class="hlt">Metal</span> Stents and First- and Second-Generation Drug-Eluting Stents.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Goto, Kosaku; Zhao, Zhijing; Matsumura, Mitsuaki; Dohi, Tomotaka; Kobayashi, Nobuaki; Kirtane, Ajay J; Rabbani, LeRoy E; Collins, Michael B; Parikh, Manish A; Kodali, Susheel K; Leon, Martin B; Moses, Jeffrey W; Mintz, Gary S; Maehara, Akiko</p> <p>2015-11-01</p> <p>The most common causes of in-stent restenosis (ISR) are intimal hyperplasia and stent under expansion. The purpose of this study was to use intravascular ultrasound (IVUS) to compare the ISR mechanisms of bare <span class="hlt">metal</span> stents (<span class="hlt">BMS</span>), first-generation drug-eluting stents (DES), and second-generation DES. There were 298 ISR lesions including 52 <span class="hlt">BMS</span>, 73 sirolimus-eluting stents, 52 paclitaxel-eluting stents, 16 zotarolimus-eluting stents, and 105 everolimus-eluting stent. Mean patient age was 66.6 ± 1.1 years, 74.2% were men, and 48.3% had diabetes mellitus. <span class="hlt">BMS</span> restenosis presented later (70.0 ± 66.7 months) with more intimal hyperplasia compared with DES (<span class="hlt">BMS</span> 58.6 ± 15.5%, first-generation DES 52.6 ± 20.9%, second-generation DES 48.2 ± 22.2%, p = 0.02). Although reference lumen areas were similar in <span class="hlt">BMS</span> and first- and second-generation DES, restenotic DES were longer (<span class="hlt">BMS</span> 21.8 ± 13.5 mm, first-generation DES 29.4 ± 16.1 mm, second-generation DES 32.1 ± 18.7 mm, p = 0.003), and stent areas were smaller (<span class="hlt">BMS</span> 7.2 ± 2.4 mm(2), first-generation DES 6.1 ± 2.1 mm(2), second-generation DES 5.7 ± 2.0 mm(2), p <0.001). Stent fracture was seen only in DES (first-generation DES 7 [5.0%], second-generation DES 8 [7.4%], p = 0.13). In conclusion, restenotic first- and second-generation DES were characterized by less neointimal hyperplasia, smaller stent areas, longer stent lengths, and more stent fractures than restenotic <span class="hlt">BMS</span>. Copyright © 2015 Elsevier Inc. All rights reserved.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/biblio/22617086-critical-temperature-metallic-hydrogen-sulfide-gpa-pressure','SCIGOV-STC'); return false;" href="https://www.osti.gov/biblio/22617086-critical-temperature-metallic-hydrogen-sulfide-gpa-pressure"><span>Critical temperature of <span class="hlt">metallic</span> hydrogen <span class="hlt">sulfide</span> at 225-GPa pressure</span></a></p> <p><a target="_blank" href="http://www.osti.gov/search">DOE Office of Scientific and Technical Information (OSTI.GOV)</a></p> <p>Kudryashov, N. A.; Kutukov, A. A.; Mazur, E. A., E-mail: EAMazur@mephi.ru</p> <p>2017-01-15</p> <p>The Eliashberg theory generalized for electron—phonon systems with a nonconstant density of electron states and with allowance made for the frequency behavior of the electron mass and chemical potential renormalizations is used to study T{sub c} in the SH{sub 3} phase of hydrogen <span class="hlt">sulfide</span> under pressure. The phonon contribution to the anomalous electron Green’s function is considered. The pairing within the total width of the electron band and not only in a narrow layer near the Fermi surface is taken into account. The frequency and temperature dependences of the complex mass renormalization ReZ(ω), the density of states N(ε) renormalized bymore » the electron—phonon interactions, and the electron—phonon spectral function obtained computationally are used to calculate the anomalous electron Green’s function. A generalized Eliashberg equation with a variable density of electron states has been solved. The frequency dependence of the real and imaginary parts of the order parameter in the SH{sub 3} phase has been obtained. The value of T{sub c} ≈ 177 K in the SH{sub 3} phase of hydrogen <span class="hlt">sulfide</span> at pressure P = 225 GPa has been determined by solving the system of Eliashberg equations.« less</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=5480029','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=5480029"><span><span class="hlt">Sulfide</span> Homeostasis and Nitroxyl Intersect via Formation of Reactive Sulfur Species in Staphylococcus aureus</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Peng, Hui; Shen, Jiangchuan; Edmonds, Katherine A.; Luebke, Justin L.; Hickey, Anne K.; Palmer, Lauren D.; Chang, Feng-Ming James; Bruce, Kevin A.; Kehl-Fie, Thomas E.; Skaar, Eric P.</p> <p>2017-01-01</p> <p>ABSTRACT Staphylococcus aureus is a commensal human pathogen and a major cause of nosocomial infections. As gaseous signaling molecules, endogenous hydrogen <span class="hlt">sulfide</span> (H2S) and nitric oxide (NO·) protect S. aureus from antibiotic stress synergistically, which we propose involves the intermediacy of nitroxyl (HNO). Here, we examine the effect of exogenous <span class="hlt">sulfide</span> and HNO on the transcriptome and the formation of low-molecular-weight (LMW) thiol persulfides of bacillithiol, cysteine, and coenzyme A as representative of reactive sulfur species (RSS) in wild-type and ΔcstR strains of S. aureus. CstR is a per- and polysulfide sensor that controls the expression of a <span class="hlt">sulfide</span> oxidation and detoxification system. As anticipated, exogenous <span class="hlt">sulfide</span> induces the cst operon but also indirectly represses much of the CymR regulon which controls cysteine metabolism. A zinc limitation response is also observed, linking <span class="hlt">sulfide</span> homeostasis to zinc bioavailability. Cellular RSS levels impact the expression of a number of virulence factors, including the exotoxins, particularly apparent in the ΔcstR strain. HNO, like <span class="hlt">sulfide</span>, induces the cst operon as well as other genes regulated by exogenous <span class="hlt">sulfide</span>, a finding that is traced to a direct reaction of CstR with HNO and to an endogenous perturbation in cellular RSS, possibly originating from disassembly of Fe-S clusters. More broadly, HNO induces a transcriptomic response to Fe overload, Cu toxicity, and reactive oxygen species and reactive nitrogen species and shares similarity with the sigB regulon. This work reveals an H2S/NO· interplay in S. aureus that impacts transition <span class="hlt">metal</span> homeostasis and virulence gene expression. IMPORTANCE Hydrogen <span class="hlt">sulfide</span> (H2S) is a toxic molecule and a recently described gasotransmitter in vertebrates whose function in bacteria is not well understood. In this work, we describe the transcriptomic response of the major human pathogen Staphylococcus aureus to quantified changes in levels of cellular</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/29890420','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/29890420"><span>Effect of surface modification on carbon nanotubes (CNTs) catalyzed nitrobenzene reduction by <span class="hlt">sulfide</span>.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Liu, Qi; Zhao, Han-Qing; Li, Lei; He, Pan-Pan; Wang, Yi-Xuan; Yang, Hou-Yun; Hu, Zhen-Hu; Mu, Yang</p> <p>2018-06-04</p> <p>Carbon nanotubes (CNTs) could be directly used as <span class="hlt">metal</span>-free catalysts for the reduction of nitroaromatics by <span class="hlt">sulfide</span> in water, but their catalytic ability need a further improvement. This study evaluated the feasibility of surface modification through thermal and radiation pretreatments to enhance catalytic activity of CNTs on nitrobenzene reduction by <span class="hlt">sulfide</span>. The results show that thermal treatment could effectively improve the catalytic behaviors of CNTs for the reduction of nitrobenzene by <span class="hlt">sulfide</span>, where the optimum annealing temperature was 400 °C. However, plasma radiation pretreatment didn't result in an obvious improvement of the CNTs catalytic activity. Moreover, the possible reasons have been explored and discussed in the study. Additionally, the impacts of various operational parameters on nitrobenzene reduction catalyzed by the CNTs after an optimized surface modification were also evaluated. It was found that the rate of nitrobenzene removal by <span class="hlt">sulfide</span> was positively correlated with CNTs doses in a range of 0.3-300 mg L -1 ; the optimum pH was around 8.0; higher temperature and <span class="hlt">sulfide</span> concentration facilitated the reaction; and the presence of humic acid exhibited a negative effect on nitrobenzene reduction. Copyright © 2018 Elsevier B.V. All rights reserved.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/29550588','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/29550588"><span>FABP4 inhibitor <span class="hlt">BMS</span>309403 decreases saturated-fatty-acid-induced endoplasmic reticulum stress-associated inflammation in skeletal muscle by reducing p38 MAPK activation.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Bosquet, Alba; Girona, Josefa; Guaita-Esteruelas, Sandra; Heras, Mercedes; Saavedra-García, Paula; Martínez-Micaelo, Neus; Masana, Lluís; Rodríguez-Calvo, Ricardo</p> <p>2018-06-01</p> <p>Fatty acid binding protein 4 (FABP4) inhibitors have been proposed as potential therapeutic approaches against insulin resistance-related inflammation and type 2 diabetes mellitus. However, the underlying molecular mechanisms by which these molecules drive these effects in skeletal muscle remain unknown. Here, we assessed whether the FABP4 inhibitor <span class="hlt">BMS</span>309403 prevented lipid-induced endoplasmic reticulum (ER) stress-associated inflammation in skeletal muscle. The <span class="hlt">BMS</span>309403 treatment was assessed both in the skeletal muscle of high-fat diet (HFD)-fed mice and in palmitate-stimulated C2C12 myotubes. HFD feeding promoted insulin resistance, which is characterized by increased plasma levels of glucose, insulin, non-esterified fatty acids, triglycerides, resistin, and leptin and reduced plasma levels of adiponectin compared with control mice fed a standard diet. Additionally, insulin-resistant animals showed increased FABP4 plasma levels. In line with this evidence, recombinant FABP4 attenuated the insulin-induced AKT phosphorylation in C2C12 myotubes. Treatment with <span class="hlt">BMS</span>309403 reduced lipid-induced ER stress and inflammation in both mouse skeletal muscle and C2C12 myotubes. The effects of the FABP4 inhibitor reducing lipid-induced ER stress-associated inflammation were related to the reduction of fatty acid-induced intramyocellular lipid deposits, ROS and nuclear factor-kappaB (NF-κB) nuclear translocation. Accordingly, <span class="hlt">BMS</span>309403 reduced lipid-induced p38 MAPK phosphorylation, which is upstream of NF-κB activation. Overall, these findings indicate that <span class="hlt">BMS</span>309403 reduces fatty acid-induced ER stress-associated inflammation in skeletal muscle by reducing p38 MAPK activation. Copyright © 2018 Elsevier B.V. All rights reserved.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2014AGUFM.B13A0164P','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2014AGUFM.B13A0164P"><span>Sulfate Reduction and <span class="hlt">Sulfide</span> Biomineralization By Deep-Sea Hydrothermal Vent Microorganisms</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Picard, A.; Gartman, A.; Clarke, D. R.; Girguis, P. R.</p> <p>2014-12-01</p> <p>Deep-sea hydrothermal vents are characterized by steep temperature and chemical gradients and moderate pressures. At these sites, mesophilic sulfate-reducing bacteria thrive, however their significance for the formation of <span class="hlt">sulfide</span> minerals is unknown. In this study we investigated sulfate reduction and <span class="hlt">sulfide</span> biomineralization by the deep-sea bacterium Desulfovibrio hydrothermalis isolated from a deep-sea vent chimney at the Grandbonum vent site (13°N, East Pacific Rise, 2600 m water depth) [1]. Sulfate reduction rates were determined as a function of pressure and temperature. Biomineralization of <span class="hlt">sulfide</span> minerals in the presence of various <span class="hlt">metal</span> concentrations was characterized using light and electron microscopy and optical spectroscopy. We seek to better understand the significance of biological sulfate reduction in deep-sea hydrothermal environments, to characterize the steps in <span class="hlt">sulfide</span> mineral nucleation and growth, and identify the interactions between cells and minerals. [1] D. Alazard, S. Dukan, A. Urios, F. Verhe, N. Bouabida, F. Morel, P. Thomas, J.L. Garcia and B. Ollivier, Desulfovibrio hydrothermalis sp. nov., a novel sulfate-reducing bacterium isolated from hydrothermal vents, Int. J. Syst. Evol. Microbiol., 53 (2003) 173-178.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/29261656','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/29261656"><span>Nicotinic alpha 7 receptor agonists EVP-6124 and <span class="hlt">BMS</span>-933043, attenuate scopolamine-induced deficits in visuo-spatial paired associates learning.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Weed, Michael R; Polino, Joseph; Signor, Laura; Bookbinder, Mark; Keavy, Deborah; Benitex, Yulia; Morgan, Daniel G; King, Dalton; Macor, John E; Zaczek, Robert; Olson, Richard; Bristow, Linda J</p> <p>2017-01-01</p> <p>Agonists at the nicotinic acetylcholine alpha 7 receptor (nAChR α7) subtype have the potential to treat cognitive deficits in patients with Alzheimer's disease (AD) or schizophrenia. Visuo-spatial paired associates learning (vsPAL) is a task that has been shown to reliably predict conversion from mild cognitive impairment to AD in humans and can also be performed by nonhuman primates. Reversal of scopolamine-induced impairment of vsPAL performance may represent a translational approach for the development of nAChR α7 agonists. The present study investigated the effect of treatment with the acetylcholinesterase inhibitor, donepezil, or three nAChR α7 agonists, <span class="hlt">BMS</span>-933043, EVP-6124 and RG3487, on vsPAL performance in scopolamine-treated cynomolgus monkeys. Scopolamine administration impaired vsPAL performance accuracy in a dose- and difficulty- dependent manner. The impairment of eventual accuracy, a measure of visuo-spatial learning during the task, was significantly ameliorated by treatment with donepezil (0.3 mg/kg, i.m.), EVP-6124 (0.01 mg/kg, i.m.) or <span class="hlt">BMS</span>-933043 (0.03, 0.1 and 0.3 mg/kg, i.m.). Both nAChR α7 agonists showed inverted-U shaped dose-effect relationships with EVP-6124 effective at a single dose only whereas <span class="hlt">BMS</span>-933043 was effective across at least a 10 fold dose/exposure range. RG3487 was not efficacious in this paradigm at the dose range examined (0.03-1 mg/kg, i.m.). These results are the first demonstration that the nAChR α7 agonists, EVP-6124 and <span class="hlt">BMS</span>-933043, can ameliorate scopolamine-induced cognitive deficits in nonhuman primates performing the vsPAL task.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/28787992','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/28787992"><span>Hierarchical Architecturing for Layered Thermoelectric <span class="hlt">Sulfides</span> and Chalcogenides.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Jood, Priyanka; Ohta, Michihiro</p> <p>2015-03-16</p> <p><span class="hlt">Sulfides</span> are promising candidates for environment-friendly and cost-effective thermoelectric materials. In this article, we review the recent progress in all-length-scale hierarchical architecturing for <span class="hlt">sulfides</span> and chalcogenides, highlighting the key strategies used to enhance their thermoelectric performance. We primarily focus on TiS₂-<span class="hlt">based</span> layered <span class="hlt">sulfides</span>, misfit layered <span class="hlt">sulfides</span>, homologous chalcogenides, accordion-like layered Sn chalcogenides, and thermoelectric minerals. CS₂ sulfurization is an appropriate method for preparing <span class="hlt">sulfide</span> thermoelectric materials. At the atomic scale, the intercalation of guest atoms/layers into host crystal layers, crystal-structural evolution enabled by the homologous series, and low-energy atomic vibration effectively scatter phonons, resulting in a reduced lattice thermal conductivity. At the nanoscale, stacking faults further reduce the lattice thermal conductivity. At the microscale, the highly oriented microtexture allows high carrier mobility in the in-plane direction, leading to a high thermoelectric power factor.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=5455437','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=5455437"><span>Hierarchical Architecturing for Layered Thermoelectric <span class="hlt">Sulfides</span> and Chalcogenides</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Jood, Priyanka; Ohta, Michihiro</p> <p>2015-01-01</p> <p><span class="hlt">Sulfides</span> are promising candidates for environment-friendly and cost-effective thermoelectric materials. In this article, we review the recent progress in all-length-scale hierarchical architecturing for <span class="hlt">sulfides</span> and chalcogenides, highlighting the key strategies used to enhance their thermoelectric performance. We primarily focus on TiS2-<span class="hlt">based</span> layered <span class="hlt">sulfides</span>, misfit layered <span class="hlt">sulfides</span>, homologous chalcogenides, accordion-like layered Sn chalcogenides, and thermoelectric minerals. CS2 sulfurization is an appropriate method for preparing <span class="hlt">sulfide</span> thermoelectric materials. At the atomic scale, the intercalation of guest atoms/layers into host crystal layers, crystal-structural evolution enabled by the homologous series, and low-energy atomic vibration effectively scatter phonons, resulting in a reduced lattice thermal conductivity. At the nanoscale, stacking faults further reduce the lattice thermal conductivity. At the microscale, the highly oriented microtexture allows high carrier mobility in the in-plane direction, leading to a high thermoelectric power factor. PMID:28787992</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/26493248','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/26493248"><span>Stent Thrombosis in Drug-Eluting or Bare-<span class="hlt">Metal</span> Stents in Patients Receiving Dual Antiplatelet Therapy.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Kereiakes, Dean J; Yeh, Robert W; Massaro, Joseph M; Driscoll-Shempp, Priscilla; Cutlip, Donald E; Steg, P Gabriel; Gershlick, Anthony H; Darius, Harald; Meredith, Ian T; Ormiston, John; Tanguay, Jean-François; Windecker, Stephan; Garratt, Kirk N; Kandzari, David E; Lee, David P; Simon, Daniel I; Iancu, Adrian Corneliu; Trebacz, Jaroslaw; Mauri, Laura</p> <p>2015-10-01</p> <p>This study sought to compare rates of stent thrombosis and major adverse cardiac and cerebrovascular events (MACCE) (composite of death, myocardial infarction, or stroke) after coronary stenting with drug-eluting stents (DES) versus bare-<span class="hlt">metal</span> stents (<span class="hlt">BMS</span>) in patients who participated in the DAPT (Dual Antiplatelet Therapy) study, an international multicenter randomized trial comparing 30 versus 12 months of dual antiplatelet therapy in subjects undergoing coronary stenting with either DES or <span class="hlt">BMS</span>. Despite antirestenotic efficacy of coronary DES compared with <span class="hlt">BMS</span>, the relative risk of stent thrombosis and adverse cardiovascular events is unclear. Many clinicians perceive <span class="hlt">BMS</span> to be associated with fewer adverse ischemic events and to require shorter-duration dual antiplatelet therapy than DES. Prospective propensity-matched analysis of subjects enrolled into a randomized trial of dual antiplatelet therapy duration was performed. DES- and <span class="hlt">BMS</span>-treated subjects were propensity-score matched in a many-to-one fashion. The study design was observational for all subjects 0 to 12 months following stenting. A subset of eligible subjects without major ischemic or bleeding events were randomized at 12 months to continued thienopyridine versus placebo; all subjects were followed through 33 months. Among 10,026 propensity-matched subjects, DES-treated subjects (n = 8,308) had a lower rate of stent thrombosis through 33 months compared with <span class="hlt">BMS</span>-treated subjects (n = 1,718, 1.7% vs. 2.6%; weighted risk difference -1.1%, p = 0.01) and a noninferior rate of MACCE (11.4% vs. 13.2%, respectively, weighted risk difference -1.8%, p = 0.053, noninferiority p < 0.001). DES-treated subjects have long-term rates of stent thrombosis that are lower than <span class="hlt">BMS</span>-treated subjects. (The Dual Antiplatelet Therapy Study [DAPT study]; NCT00977938). Copyright © 2015 American College of Cardiology Foundation. Published by Elsevier Inc. All rights reserved.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2001JSAES..14..271K','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2001JSAES..14..271K"><span>Magnetic and gravity anomalies in the Sierra del Padre and Sierra del Tala, San Luis Province, Argentina: evidence of buried mafic ultramafic rocks</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Kostadinoff, José; Alfredo Bjerg, Ernesto; Gregori, Daniel; Delpino, Sergio; Dimieri, Luis; Raniolo, Ariel; Mogessie, Aberra; Hoinkes, Georg; Hauzenberger, Christoph; Felfernig, Anja</p> <p>2001-07-01</p> <p>This paper presents the results of a geophysical study of the southern portion of the Sierra Grande de San Luis, San Luis Province, Argentina. A 26 mGal amplitude Bouguer anomaly (Charlone anomaly), measuring 40 km long by 7 km wide, between Sierra de los Padres and Zanjitas reflects the presence of high-density rocks located at approximately 2000 m depth. Geophysical models <span class="hlt">based</span> on more than 300 gravimetric, magnetometric, and geological field measurements and observations suggest that the mafic-ultramafic belt of Sierra Grande de San Luis continues south of San Luis. The low magnitude of the terrestrial magnetic field anomalies indicates that these mafic-ultramafic rocks do not carry a <span class="hlt">base</span> <span class="hlt">metal</span> <span class="hlt">sulfides</span> (<span class="hlt">BMS</span>) mineralization. The Charlone gravimetric anomaly is generated by a belt of mafic- ultramafic rocks whose amplitude is comparable with that responsible for the Virorco-Las Aguilas gravimetric anomaly.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/26330319','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/26330319"><span>Geochemical behavior and environmental risks related to the use of abandoned <span class="hlt">base-metal</span> tailings as construction material in the upper-Moulouya district, Morocco.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Argane, R; El Adnani, M; Benzaazoua, M; Bouzahzah, H; Khalil, A; Hakkou, R; Taha, Y</p> <p>2016-01-01</p> <p>In some developing countries, <span class="hlt">base-metal</span> residues that were abandoned in tailing ponds or impoundments are increasingly used as construction material without any control, engineering basis, or environmental concern. This uncontrolled reuse of mine tailings may constitute a new form of pollution risks for humans and ecosystems through <span class="hlt">metal</span> leaching. Therefore, the aim of the current study is to assess mine drainage, <span class="hlt">metal</span> mobility, and geochemical behavior of two abandoned mine tailings commonly used in the upper-Moulouya region (eastern Morocco) as fine aggregates for mortar preparation. Their detailed physical, chemical, and mineralogical properties were subsequently evaluated in the context of developing appropriate alternative reuses to replace their conventional disposal and limit their weathering exposure. The obtained results showed that both tailings contain relatively high quantities of residual <span class="hlt">metals</span> and metalloids with lead (ranging between 3610 and 5940 mg/kg) being the major pollutant. However, the mineralogical investigations revealed the presence of abundant neutralizing minerals and low <span class="hlt">sulfide</span> content which influence mine drainage geochemistry and subsequently lower <span class="hlt">metals</span> mobility. In fact, leachate analyses from weathering cell kinetic tests showed neutral conditions and low <span class="hlt">sulfide</span> oxidation rates. According to these results, the tailings used as construction material in the upper-Moulouya region have very low generating potential of contaminated effluents and their reuse as aggregates may constitute a sustainable alternative method for efficient tailing management.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2000PhDT.......198M','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2000PhDT.......198M"><span>Kinetic studies of <span class="hlt">sulfide</span> mineral oxidation and xanthate adsorption</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Mendiratta, Neeraj K.</p> <p>2000-10-01</p> <p><span class="hlt">Sulfide</span> minerals are a major source of <span class="hlt">metals</span>; however, certain <span class="hlt">sulfide</span> minerals, such as pyrite and pyrrhotite, are less desirable. Froth flotation is a commonly used separation technique, which requires the use of several reagents to float and depress different <span class="hlt">sulfide</span> minerals. Xanthate, a thiol collector, has gained immense usage in <span class="hlt">sulfide</span> minerals flotation. However, some <span class="hlt">sulfides</span> are naturally hydrophobic and may float without a collector. Iron <span class="hlt">sulfides</span>, such as pyrite and pyrrhotite, are few of the most abundant minerals, yet economically insignificant. Their existence with other <span class="hlt">sulfide</span> minerals leads to an inefficient separation process as well as environmental problems, such as acid mine drainage during mining and processing and SO 2 emissions during smelting process. A part of the present study is focused on understanding their behavior, which leads to undesired flotation and difficulties in separation. The major reasons for the undesired flotation are attributed to the collectorless hydrophobicity and the activation with heavy <span class="hlt">metal</span> ions. To better understand the collectorless hydrophobicity of pyrite, Electrochemical Impedance Spectroscopy (EIS) of freshly fractured pyrite electrodes was used to study the oxidation and reduction of the mineral. The EIS results showed that the rate of reaction increases with oxidation and reduction. At moderate oxidizing potentials, the rate of reaction is too slow to replenish hydrophilic iron species leaving hydrophobic sulfur species on the surface. However, at higher potentials, iron species are replaced fast enough to depress its flotation. Effects of pH and polishing were also explored using EIS. Besides collectorless hydrophobicity, the activation of pyrrhotite with nickel ions and interaction with xanthate ions makes the separation more difficult. DETA and SO2 are commonly used as pyrrhotite depressants; however, the mechanism is not very well understood. Contact angle measurements, cyclic voltammetry and Tafel</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/23892368','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/23892368"><span>Carbon-dot-<span class="hlt">based</span> fluorescent turn-on sensor for selectively detecting <span class="hlt">sulfide</span> anions in totally aqueous media and imaging inside live cells.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Hou, Xianfeng; Zeng, Fang; Du, Fangkai; Wu, Shuizhu</p> <p>2013-08-23</p> <p><span class="hlt">Sulfide</span> anions are generated not only as a byproduct from industrial processes but also in biosystems. Hence, robust fluorescent sensors for detecting <span class="hlt">sulfide</span> anions which are fast-responding, water soluble and biocompatible are highly desirable. Herein, we report a carbon-dot-<span class="hlt">based</span> fluorescent sensor, which features excellent water solubility, low cytotoxicity and a short response time. This sensor is <span class="hlt">based</span> on the ligand/Cu(II) approach so as to achieve fast sensing of <span class="hlt">sulfide</span> anions. The carbon dot (CD) serves as the fluorophore as well as the anchoring site for the ligands which bind with copper ions. For this CD-<span class="hlt">based</span> system, as copper ions bind with the ligands which reside on the surface of the CD, the paramagnetic copper ions efficiently quench the fluorescence of the CD, affording the system a turn-off sensor for copper ions. More importantly, the subsequently added <span class="hlt">sulfide</span> anions can extract Cu(2+) from the system and form very stable CuS with Cu(2+), resulting in fluorescence enhancement and affording the system a turn-on sensor for <span class="hlt">sulfide</span> anions. This fast-responding and selective sensor can operate in totally aqueous solution or in physiological milieu with a low detection limit of 0.78 μM. It displays good biocompatibility, and excellent cell membrane permeability, and can be used to monitor S(2-) levels in running water and living cells.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2016JHEP...11..150L','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2016JHEP...11..150L"><span>Super-<span class="hlt">BMS</span>3 algebras from {N}=2 flat supergravities</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Lodato, Ivano; Merbis, Wout</p> <p>2016-11-01</p> <p>We consider two possible flat space limits of three dimensional {N}=(1, 1) AdS supergravity. They differ by how the supercharges are scaled with the AdS radius ℓ: the first limit (democratic) leads to the usual super-Poincaré theory, while a novel `twisted' theory of supergravity stems from the second (despotic) limit. We then propose boundary conditions such that the asymptotic symmetry algebras at null infinity correspond to supersymmetric extensions of the <span class="hlt">BMS</span> algebras previously derived in connection to non- and ultra-relativistic limits of the {N}=(1, 1) Virasoro algebra in two dimensions. Finally, we study the supersymmetric energy bounds and find the explicit form of the asymptotic and global Killing spinors of supersymmetric solutions in both flat space supergravity theories.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2014EurSS..47..153V','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2014EurSS..47..153V"><span>Biogeochemistry of heavy <span class="hlt">metals</span> in contaminated excessively moistened soils (Analytical review)</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Vodyanitskii, Yu. N.; Plekhanova, I. O.</p> <p>2014-03-01</p> <p>The biogeochemical behavior of heavy <span class="hlt">metals</span> in contaminated excessively moistened soils depends on the development of reducing conditions (either moderate or strong). Upon the moderate biogenic reduction, Cr as the <span class="hlt">metal</span> with variable valence forms low-soluble compounds, which decreases its availability to plants and prevents its penetration into surface- and groundwater. Creation of artificial barriers for Cr fixation on contaminated sites is <span class="hlt">based</span> on the stimulation of natural <span class="hlt">metal</span>-reducing bacteria. Arsenic, being a metalloid with a variable valence, is mobilized upon the moderate biogenic reduction. The mobility of siderophilic heavy <span class="hlt">metals</span> with a constant valence grows under the moderate reducing conditions at the expense of dissolution of iron (hydr)oxides as carriers of these <span class="hlt">metals</span>. Zinc, which can enter the newly formed goethite lattice, is an exception. Strong reduction processes in organic excessively moist and flooded soils (usually enriched in S) lead to the formation of low-soluble <span class="hlt">sulfides</span> of heavy elements with both variable (As) and constant (Cu, Ni, Zn, and Pb) valence. On changing aquatic regime in overmoistened soils and their drying, <span class="hlt">sulfides</span> of heavy <span class="hlt">metals</span> are oxidized, and previously fixed <span class="hlt">metals</span> are mobilized.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/26916633','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/26916633"><span>Very late stent thrombosis with second generation drug eluting stents compared to bare <span class="hlt">metal</span> stents: Network meta-analysis of randomized primary percutaneous coronary intervention trials.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Philip, Femi; Stewart, Susan; Southard, Jeffrey A</p> <p>2016-07-01</p> <p>The relative safety of drug-eluting stents (DES) and bare-<span class="hlt">metal</span> stents (<span class="hlt">BMS</span>) in primary percutaneous coronary intervention (PPCI) in ST elevation myocardial infarction (STEMI) continues to be debated. The long-term clinical outcomes between second generation DES and <span class="hlt">BMS</span> for primary percutaneous coronary intervention (PCI) using network meta-analysis were compared. Randomized controlled trials comparing stent types (first generation DES, second generation DES, or <span class="hlt">BMS</span>) were considered for inclusion. A search strategy used Medline, Embase, Cochrane databases, and proceedings of international meetings. Information about study design, inclusion criteria, and sample characteristics were extracted. Network meta-analysis was used to pool direct (comparison of second generation DES to <span class="hlt">BMS</span>) and indirect evidence (first generation DES with <span class="hlt">BMS</span> and second generation DES) from the randomized trials. Twelve trials comparing all stents types including 9,673 patients randomly assigned to treatment groups were analyzed. Second generation DES was associated with significantly lower incidence of definite or probable ST (OR 0.59, 95% CI 0.39-0.89), MI (OR 0.59, 95% CI 0.39-0.89), and TVR at 3 years (OR 0.50: 95% CI 0.31-0.81) compared with <span class="hlt">BMS</span>. In addition, there was a significantly lower incidence of MACE with second generation DES versus <span class="hlt">BMS</span> (OR 0.54, 95% CI 0.34-0.74) at 3 years. These were driven by a higher rate of TVR, MI and stent thrombosis in the <span class="hlt">BMS</span> group at 3 years. There was a non-significant reduction in the overall and cardiac mortality [OR 0.83, 95% CI (0.60-1.14), OR 0.88, 95% CI (0.6-1.28)] with the use of second generation DES versus <span class="hlt">BMS</span> at 3 years. Network meta-analysis of randomized trials of primary PCI demonstrated lower incidence of MACE, MI, TVR, and stent thrombosis with second generation DES compared with <span class="hlt">BMS</span>. © 2016 Wiley Periodicals, Inc. © 2016 Wiley Periodicals, Inc.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/servlets/purl/873552','DOE-PATENT-XML'); return false;" href="https://www.osti.gov/servlets/purl/873552"><span>Method for separating <span class="hlt">metal</span> chelates from other materials <span class="hlt">based</span> on solubilities in supercritical fluids</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Wai, Chien M.; Smart, Neil G.; Phelps, Cindy</p> <p>2001-01-01</p> <p>A method for separating a desired <span class="hlt">metal</span> or metalloi from impurities using a supercritical extraction process <span class="hlt">based</span> on solubility differences between the components, as well as the ability to vary the solvent power of the supercritical fluid, is described. The use of adduct-forming agents, such as phosphorous-containing ligands, to separate <span class="hlt">metal</span> or metalloid chelates in such processes is further disclosed. In preferred embodiments, the extraction solvent is supercritical carbon dioxide and the chelating agent is selected from the group consisting of .beta.-diketones; phosphine oxides, such as trialkylphosphine oxides, triarylphosphine oxides and alkylarylphosphine oxides; phosphinic acids; carboxylic acids; phosphates, such as trialkylphosphates, triarylphosphates and alkylarylphosphates; crown ethers; dithiocarbamates; phosphine <span class="hlt">sulfides</span>; phosphorothioic acids; thiophosphinic acids; halogenated analogs of these chelating agents; and mixtures of these chelating agents. In especially preferred embodiments, at least one of the chelating agents is fluorinated.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://pubs.er.usgs.gov/publication/70022965','USGSPUBS'); return false;" href="https://pubs.er.usgs.gov/publication/70022965"><span>Geochemical and mineralogical controls on trace element release from the Penn Mine <span class="hlt">base-metal</span> slag dump, California</span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Parsons, M.B.; Bird, D.K.; Einaudi, M.T.; Alpers, Charles N.</p> <p>2001-01-01</p> <p><span class="hlt">Base-metal</span> slag deposits at the Penn Mine in Calaveras County, California, are a source of environmental contamination through leaching of potentially toxic elements. Historical Cu smelting at Penn Mine (1865-1919) generated approximately 200,000 m3 of slag. The slag deposits, which are flooded annually by a reservoir used for drinking water and irrigation, also may be in contact with acidic ground waters (pH < 4) from the adjacent mine area. Slags vary from grey to black, are glassy to crystalline, and range in size from coarse sand to large (0.6 ?? 0.7 ?? 1.5 m), tub-shaped casts. <span class="hlt">Metals</span> are hosted by a variety of minerals and two glass phases. On the basis of mineralogy, slags are characterized by 4 main types: fayalite-rich, glassy, willemite-rich, and <span class="hlt">sulfide</span>-rich. The ranges in <span class="hlt">metal</span> and metalloid concentrations of 17 slag samples are: As, 0.0004-0.92; Ba, 0.13-2.9; Cd, 0.0014-1.4; Cu, 0.18-6.4; Pb, 0.02-11; and Zn, 3.2-28 wt.%. Leachates from Toxicity Characteristic Leaching Procedure tests (acetic acid buffered at pH 4.93) on two wiltemite-rich slags contained Cd and Pb concentrations (up to 2.5 and 30 mg/l, respectively) in excess of US Environmental Protection Agency (USEPA) regulatory limits. Analyses of filtered (0.45 ??m) water, collected within the flooded slag dump during reservoir drawdown, reveal concentrations of Cd (1.7 ??g/l), Cu (35 ??g/l), and Zn (250 ??g/l) that exceed USEPA chronic toxicity guidelines for the protection of aquatic life. Data from field and laboratory studies were used to develop geochemical models with the program EQ3/6 that simulate irreversible mass-transfer between slag deposits and reservoir waters. These models include kinetic rate laws for abiotic <span class="hlt">sulfide</span> oxidation and surface-controlled dissolution of silicates, oxides, and glass. Calculations demonstrate that the main processes controlling dissolved <span class="hlt">metal</span> concentrations are (1) dissolution of fayalite, willemite, and glass; (2) <span class="hlt">sulfide</span> oxidation; and (3) secondary</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_17");'>17</a></li> <li><a href="#" onclick='return showDiv("page_18");'>18</a></li> <li class="active"><span>19</span></li> <li><a href="#" onclick='return showDiv("page_20");'>20</a></li> <li><a href="#" onclick='return showDiv("page_21");'>21</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_19 --> <div id="page_20" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_18");'>18</a></li> <li><a href="#" onclick='return showDiv("page_19");'>19</a></li> <li class="active"><span>20</span></li> <li><a href="#" onclick='return showDiv("page_21");'>21</a></li> <li><a href="#" onclick='return showDiv("page_22");'>22</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="381"> <li> <p><a target="_blank" onclick="trackOutboundLink('https://pubs.er.usgs.gov/publication/70190453','USGSPUBS'); return false;" href="https://pubs.er.usgs.gov/publication/70190453"><span><span class="hlt">Metal</span> dispersion resulting from mining activities in coastal environments: A pathways approach</span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Koski, Randolph A.</p> <p>2012-01-01</p> <p>Acid rock drainage (ARD) and disposal of tailings that result from mining activities impact coastal areas in many countries. The dispersion of <span class="hlt">metals</span> from mine sites that are both proximal and distal to the shoreline can be examined using a pathways approach in which physical and chemical processes guide <span class="hlt">metal</span> transport in the continuum from sources (<span class="hlt">sulfide</span> minerals) to bioreceptors (marine biota). Large amounts of <span class="hlt">metals</span> can be physically transported to the coastal environment by intentional or accidental release of <span class="hlt">sulfide</span>-bearing mine tailings. Oxidation of <span class="hlt">sulfide</span> minerals results in elevated dissolved <span class="hlt">metal</span> concentrations in surface waters on land (producing ARD) and in pore waters of submarine tailings. Changes in pH, adsorption by insoluble secondary minerals (e.g., Fe oxyhydroxides), and precipitation of soluble salts (e.g., sulfates) affect dissolved <span class="hlt">metal</span> fluxes. Evidence for bioaccumulation includes anomalous <span class="hlt">metal</span> concentrations in bivalves and reef corals, and overlapping Pb isotope ratios for <span class="hlt">sulfides</span>, shellfish, and seaweed in contaminated environments. Although bioavailability and potential toxicity are, to a large extent, functions of <span class="hlt">metal</span> speciation, specific uptake pathways, such as adsorption from solution and ingestion of particles, also play important roles. Recent emphasis on broader ecological impacts has led to complementary methodologies involving laboratory toxicity tests and field studies of species richness and diversity.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://pubs.er.usgs.gov/publication/70118541','USGSPUBS'); return false;" href="https://pubs.er.usgs.gov/publication/70118541"><span><span class="hlt">Metal</span> dispersion resulting from mining activities in coastal environments: a pathways approach</span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Koski, Randolph A.</p> <p>2012-01-01</p> <p>Acid rock drainage (ARD) and disposal of tailings that result from mining activities impact coastal areas in many countries. The dispersion of <span class="hlt">metals</span> from mine sites that are both proximal and distal to the shoreline can be examined using a pathways approach in which physical and chemical processes guide <span class="hlt">metal</span> transport in the continuum from sources (<span class="hlt">sulfide</span> minerals) to bioreceptors (marine biota). Large amounts of <span class="hlt">metals</span> can be physically transported to the coastal environment by intentional or accidental release of <span class="hlt">sulfide</span>-bearing mine tailings. Oxidation of <span class="hlt">sulfide</span> minerals results in elevated dissolved <span class="hlt">metal</span> concentrations in surface waters on land (producing ARD) and in pore waters of submarine tailings. Changes in pH, adsorption by insoluble secondary minerals (e.g., Fe oxyhydroxides), and precipitation of soluble salts (e.g., sulfates) affect dissolved <span class="hlt">metal</span> fluxes. Evidence for bioaccumulation includes anomalous <span class="hlt">metal</span> concentrations in bivalves and reef corals, and overlapping Pb isotope ratios for <span class="hlt">sulfides</span>, shellfish, and seaweed in contaminated environments. Although bioavailability and potential toxicity are, to a large extent, functions of <span class="hlt">metal</span> speciation, specific uptake pathways, such as adsorption from solution and ingestion of particles, also play important roles. Recent emphasis on broader ecological impacts has led to complementary methodologies involving laboratory toxicity tests and field studies of species richness and diversity.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/29680756','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/29680756"><span>Do constructed wetlands remove <span class="hlt">metals</span> or increase <span class="hlt">metal</span> bioavailability?</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Xu, Xiaoyu; Mills, Gary L</p> <p>2018-07-15</p> <p>The H-02 wetland was constructed to treat building process water and storm runoff water from the Tritium Processing Facility on the Department of Energy's Savannah River Site (Aiken, SC). Monthly monitoring of copper (Cu) and zinc (Zn) concentrations and water quality parameters in surface waters continued from 2014 to 2016. <span class="hlt">Metal</span> speciation was modeled at each sampling occasion. Total Cu and Zn concentrations released to the effluent stream were below the NPDES limit, and the average removal efficiency was 65.9% for Cu and 71.1% for Zn. The <span class="hlt">metal</span>-removal processes were found out to be seasonally regulated by sulfur cycling indicated by laboratory and model results. High temperature, adequate labile organic matter, and anaerobic conditions during the warm months (February to August) favored sulfate reduction that produced <span class="hlt">sulfide</span> minerals to significantly remove <span class="hlt">metals</span>. However, the dominant reaction in sulfur cycling shifted to <span class="hlt">sulfide</span> oxidation during the cool months (September to next March). High concentrations of <span class="hlt">metal</span>-organic complexes were observed, especially colloidal complexes of <span class="hlt">metal</span> and fulvic acid (FA), demonstrating adsorption to organic matter became the primary process for <span class="hlt">metal</span> removal. Meanwhile, the accumulation of <span class="hlt">metal</span>-FA complexes in the wetland system will cause negative effects to the surrounding environment as they are biologically reactive, highly bioavailable, and can be easily taken up and transferred to ecosystems by trophic exchange. Copyright © 2018 Elsevier Ltd. All rights reserved.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=5736175','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=5736175"><span>Nicotinic alpha 7 receptor agonists EVP-6124 and <span class="hlt">BMS</span>-933043, attenuate scopolamine-induced deficits in visuo-spatial paired associates learning</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Polino, Joseph; Signor, Laura; Bookbinder, Mark; Keavy, Deborah; Benitex, Yulia; Morgan, Daniel G.; King, Dalton; Macor, John E.; Zaczek, Robert; Olson, Richard; Bristow, Linda J.</p> <p>2017-01-01</p> <p>Agonists at the nicotinic acetylcholine alpha 7 receptor (nAChR α7) subtype have the potential to treat cognitive deficits in patients with Alzheimer’s disease (AD) or schizophrenia. Visuo-spatial paired associates learning (vsPAL) is a task that has been shown to reliably predict conversion from mild cognitive impairment to AD in humans and can also be performed by nonhuman primates. Reversal of scopolamine-induced impairment of vsPAL performance may represent a translational approach for the development of nAChR α7 agonists. The present study investigated the effect of treatment with the acetylcholinesterase inhibitor, donepezil, or three nAChR α7 agonists, <span class="hlt">BMS</span>-933043, EVP-6124 and RG3487, on vsPAL performance in scopolamine-treated cynomolgus monkeys. Scopolamine administration impaired vsPAL performance accuracy in a dose- and difficulty- dependent manner. The impairment of eventual accuracy, a measure of visuo-spatial learning during the task, was significantly ameliorated by treatment with donepezil (0.3 mg/kg, i.m.), EVP-6124 (0.01 mg/kg, i.m.) or <span class="hlt">BMS</span>-933043 (0.03, 0.1 and 0.3 mg/kg, i.m.). Both nAChR α7 agonists showed inverted-U shaped dose-effect relationships with EVP-6124 effective at a single dose only whereas <span class="hlt">BMS</span>-933043 was effective across at least a 10 fold dose/exposure range. RG3487 was not efficacious in this paradigm at the dose range examined (0.03–1 mg/kg, i.m.). These results are the first demonstration that the nAChR α7 agonists, EVP-6124 and <span class="hlt">BMS</span>-933043, can ameliorate scopolamine-induced cognitive deficits in nonhuman primates performing the vsPAL task. PMID:29261656</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/28196888','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/28196888"><span><span class="hlt">Sulfide</span>-responsive transcriptional repressor SqrR functions as a master regulator of <span class="hlt">sulfide</span>-dependent photosynthesis.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Shimizu, Takayuki; Shen, Jiangchuan; Fang, Mingxu; Zhang, Yixiang; Hori, Koichi; Trinidad, Jonathan C; Bauer, Carl E; Giedroc, David P; Masuda, Shinji</p> <p>2017-02-28</p> <p><span class="hlt">Sulfide</span> was used as an electron donor early in the evolution of photosynthesis, with many extant photosynthetic bacteria still capable of using sulfur compounds such as hydrogen <span class="hlt">sulfide</span> (H 2 S) as a photosynthetic electron donor. Although enzymes involved in H 2 S oxidation have been characterized, mechanisms of regulation of <span class="hlt">sulfide</span>-dependent photosynthesis have not been elucidated. In this study, we have identified a <span class="hlt">sulfide</span>-responsive transcriptional repressor, SqrR, that functions as a master regulator of <span class="hlt">sulfide</span>-dependent gene expression in the purple photosynthetic bacterium Rhodobacter capsulatus SqrR has three cysteine residues, two of which, C41 and C107, are conserved in SqrR homologs from other bacteria. Analysis with liquid chromatography coupled with an electrospray-interface tandem-mass spectrometer reveals that SqrR forms an intramolecular tetrasulfide bond between C41 and C107 when incubated with the sulfur donor glutathione persulfide. SqrR is oxidized in <span class="hlt">sulfide</span>-stressed cells, and tetrasulfide-cross-linked SqrR binds more weakly to a target promoter relative to unmodified SqrR. C41S and C107S R. capsulatus SqrRs lack the ability to respond to <span class="hlt">sulfide</span>, and constitutively repress target gene expression in cells. These results establish that SqrR is a sensor of H 2 S-derived reactive sulfur species that maintain <span class="hlt">sulfide</span> homeostasis in this photosynthetic bacterium and reveal the mechanism of <span class="hlt">sulfide</span>-dependent transcriptional derepression of genes involved in <span class="hlt">sulfide</span> metabolism.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/24374030','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/24374030"><span>Bioleaching of a low-grade nickel-copper <span class="hlt">sulfide</span> by mixture of four thermophiles.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Li, Shuzhen; Zhong, Hui; Hu, Yuehua; Zhao, Jiancun; He, Zhiguo; Gu, Guohua</p> <p>2014-02-01</p> <p>This study investigated thermophilic bioleaching of a low grade nickel-copper <span class="hlt">sulfide</span> using mixture of four acidophilic thermophiles. Effects of 0.2g/L l-cysteine on the bioleaching process were further evaluated. It aimed at offering new alternatives for enhancing <span class="hlt">metal</span> recoveries from nickel-copper <span class="hlt">sulfide</span>. Results showed a recovery of 80.4% nickel and 68.2% copper in 16-day bioleaching without l-cysteine; while 83.7% nickel and 81.4% copper were recovered in the presence of l-cysteine. Moreover, nickel recovery was always higher than copper recovery. l-Cysteine was found contributing to lower pH value, faster microbial growth, higher Oxidation-Reduction Potential (ORP), higher zeta potential and absorbing on the <span class="hlt">sulfide</span> surfaces through amino, carboxyl and sulfhydryl groups. X-ray Diffraction (XRD) patterns of leached residues showed generation of S, jarosite and ammoniojarosite. Denaturing Gradient Gel Electrophoresis (DGGE) results revealed that l-cysteine could have variant impacts on different microorganisms and changed the microbial community composition dramatically during nickel-copper <span class="hlt">sulfide</span> bioleaching. Copyright © 2013 Elsevier Ltd. All rights reserved.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2017JMoSt1139..255R','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2017JMoSt1139..255R"><span>Organic-inorganic hybrid polyionic liquid <span class="hlt">based</span> polyoxometalate as nano porous material for selective oxidation of <span class="hlt">sulfides</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Rafiee, Ezzat; Shahebrahimi, Shabnam</p> <p>2017-07-01</p> <p>Organic-inorganic hybrid nano porous materials <span class="hlt">based</span> on poly(ionic liquid)-polyoxometalate (PIL-POM) were reported. These hybrid materials were synthesized by the reaction of 4-vinyl pyridine with 1,3-propanesultone, followed by the polymerization and also sulfonate-functionalized cross-linked poly(4-vinylpyridine) and combining these polymers with H5PMo10V2O40 (PMo10V2). Activity of prepared PIL-PMo10V2 hybrids were investigated as catalysts for oxidation of <span class="hlt">sulfides</span> with H2O2 as oxidant. For understanding catalytic activities of the PIL-PMo10V2 hybrids in oxidation of <span class="hlt">sulfides</span>, effect of catalyst composition, substrate, and reaction conditions were studied. The results show that the PIL-PMo10V2 hybrids are active as selective heterogeneous catalysts for oxidation of <span class="hlt">sulfides</span> and can be recovered and reused. The catalyst was characterized by FT-IR, TGA-DSC, XRD, SEM/EDX, BET, CV and zeta potential measurement. Also, average molecular weight of prepared catalysts were measured.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2017PhDT.......224M','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2017PhDT.......224M"><span>Transition <span class="hlt">Metal</span> Nanomaterials by Bacterial Precipitation: Synthesis and Characterization of Cadmium <span class="hlt">Sulfide</span> Quantum Dots</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Marusak, Katherine Elizabeth</p> <p></p> <p>We present a new method to fabricate semiconducting, transition <span class="hlt">metal</span> nanoparticles (NPs) with tunable bandgap energies using engineered Escherichia coli. These bacteria overexpress the Treponema denticola cysteine desulfhydrase gene to facilitate precipitation of cadmium <span class="hlt">sulfide</span> (CdS) NPs. Multiple characterization techniques reveal that the bacterially precipitated NPs are agglomerates of mostly quantum dots, with diameters that can range from 3 to 15 nm, embedded in a carbon-rich matrix. Notably, the measured photoelectrochemical current generated by these NPs is comparable to values reported in the literature and higher than that of synthesized chemical bath deposited CdS NPs. We showed that we can manipulate the bandgap energy of the NPs by controlling their size through varying the precursor concentrations. Our calculated bandgap energies ranged between 2.67 eV (i.e., quantum confined CdS) to 2.36 eV ( i.e., bulk CdS). By adding the CdCl2 precursor at a specific stage of the bacterial growth cycle, we were able to induce extracellular CdS NP precipitation. Additionally, we adapted extracellular precipitation strategies to form CdS NPs on surfaces as bacterial/PC membrane composites and characterized them by spectroscopic and imaging methods, including energy dispersive spectroscopy, and scanning and transmission electron microscopy. This method allowed us to control the localization of NP precipitation throughout the layered bacterial/membrane composite, by varying the timing of the cadmium precursor addition. Additionally, we demonstrated the photodegradation of methyl orange using the CdS functionalized porous membranes, thus confirming the photocatalytic properties of our composites for eventual translation to device development. We finally also explored the precipitation of other <span class="hlt">metallic</span> NPs using our bacterial system, using enzyme extracted from our bacterial system, and using commercially available, his-tagged enzyme. We hope to extend this research to</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://pubs.er.usgs.gov/publication/70033988','USGSPUBS'); return false;" href="https://pubs.er.usgs.gov/publication/70033988"><span>Effects of humic substances on precipitation and aggregation of zinc <span class="hlt">sulfide</span> nanoparticles</span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Deonarine, Amrika; Lau, Boris L.T.; Aiken, George R.; Ryan, Joseph N.; Hsu-Kim, Heileen</p> <p>2011-01-01</p> <p>Nanoparticulate <span class="hlt">metal</span> <span class="hlt">sulfides</span> such as ZnS can influence the transport and bioavailability of pollutant <span class="hlt">metals</span> in anaerobic environments. The aim of this work was to investigate how the composition of dissolved natural organic matter (NOM) influences the stability of zinc <span class="hlt">sulfide</span> nanoparticles as they nucleate and aggregate in water with dissolved NOM. We compared NOM fractions that were isolated from several surface waters and represented a range of characteristics including molecular weight, type of carbon, and ligand density. Dynamic light scattering was employed to monitor the growth and aggregation of Zn−S−NOM nanoparticles in supersaturated solutions containing dissolved aquatic humic substances. The NOM was observed to reduce particle growth rates, depending on solution variables such as type and concentration of NOM, monovalent electrolyte concentration, and pH. The rates of growth increased with increasing ionic strength, indicating that observed growth rates primarily represented aggregation of charged Zn−S−NOM particles. Furthermore, the observed rates decreased with increasing molecular weight and aromatic content of the NOM fractions, while carboxylate and reduced sulfur content had little effect. Differences between NOM were likely due to properties that increased electrosteric hindrances for aggregation. Overall, results of this study suggest that the composition and source of NOM are key factors that contribute to the stabilization and persistence of zinc <span class="hlt">sulfide</span> nanoparticles in the aquatic environment.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=5384807','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=5384807"><span>Toward garnet electrolyte–<span class="hlt">based</span> Li <span class="hlt">metal</span> batteries: An ultrathin, highly effective, artificial solid-state electrolyte/<span class="hlt">metallic</span> Li interface</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Fu, Kun (Kelvin); Gong, Yunhui; Liu, Boyang; Zhu, Yizhou; Xu, Shaomao; Yao, Yonggang; Luo, Wei; Wang, Chengwei; Lacey, Steven D.; Dai, Jiaqi; Chen, Yanan; Mo, Yifei; Wachsman, Eric; Hu, Liangbing</p> <p>2017-01-01</p> <p>Solid-state batteries are a promising option toward high energy and power densities due to the use of lithium (Li) <span class="hlt">metal</span> as an anode. Among all solid electrolyte materials ranging from <span class="hlt">sulfides</span> to oxides and oxynitrides, cubic garnet–type Li7La3Zr2O12 (LLZO) ceramic electrolytes are superior candidates because of their high ionic conductivity (10−3 to 10−4 S/cm) and good stability against Li <span class="hlt">metal</span>. However, garnet solid electrolytes generally have poor contact with Li <span class="hlt">metal</span>, which causes high resistance and uneven current distribution at the interface. To address this challenge, we demonstrate a strategy to engineer the garnet solid electrolyte and the Li <span class="hlt">metal</span> interface by forming an intermediary Li-<span class="hlt">metal</span> alloy, which changes the wettability of the garnet surface (lithiophobic to lithiophilic) and reduces the interface resistance by more than an order of magnitude: 950 ohm·cm2 for the pristine garnet/Li and 75 ohm·cm2 for the surface-engineered garnet/Li. Li7La2.75Ca0.25Zr1.75Nb0.25O12 (LLCZN) was selected as the solid-state electrolyte (SSE) in this work because of its low sintering temperature, stabilized cubic garnet phase, and high ionic conductivity. This low area-specific resistance enables a solid-state garnet SSE/Li <span class="hlt">metal</span> configuration and promotes the development of a hybrid electrolyte system. The hybrid system uses the improved solid-state garnet SSE Li <span class="hlt">metal</span> anode and a thin liquid electrolyte cathode interfacial layer. This work provides new ways to address the garnet SSE wetting issue against Li and get more stable cell performances <span class="hlt">based</span> on the hybrid electrolyte system for Li-ion, Li-sulfur, and Li-oxygen batteries toward the next generation of Li <span class="hlt">metal</span> batteries. PMID:28435874</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/servlets/purl/1425393','SCIGOV-STC'); return false;" href="https://www.osti.gov/servlets/purl/1425393"><span>Toward garnet electrolyte–<span class="hlt">based</span> Li <span class="hlt">metal</span> batteries: An ultrathin, highly effective, artificial solid-state electrolyte/<span class="hlt">metallic</span> Li interface</span></a></p> <p><a target="_blank" href="http://www.osti.gov/search">DOE Office of Scientific and Technical Information (OSTI.GOV)</a></p> <p>Fu, Kun; Gong, Yunhui; Liu, Boyang</p> <p></p> <p>Solid-state batteries are a promising option toward high energy and power densities due to the use of lithium (Li) <span class="hlt">metal</span> as an anode. Among all solid electrolyte materials ranging from <span class="hlt">sulfides</span> to oxides and oxynitrides, cubic garnet–type Li 7La 3Zr 2O 12 (LLZO) ceramic electrolytes are superior candidates because of their high ionic conductivity (10 -3 to 10 -4 S/cm) and good stability against Li <span class="hlt">metal</span>. However, garnet solid electrolytes generally have poor contact with Li <span class="hlt">metal</span>, which causes high resistance and uneven current distribution at the interface. To address this challenge, we demonstrate a strategy to engineer the garnetmore » solid electrolyte and the Li <span class="hlt">metal</span> interface by forming an intermediary Li-<span class="hlt">metal</span> alloy, which changes the wettability of the garnet surface (lithiophobic to lithiophilic) and reduces the interface resistance by more than an order of magnitude: 950 ohm·cm2 for the pristine garnet/Li and 75 ohm·cm 2 for the surface-engineered garnet/Li. Li 7La 2.75Ca 0.25Zr 1.75Nb 0.25O 12 (LLCZN) was selected as the solid-state electrolyte (SSE) in this work because of its low sintering temperature, stabilized cubic garnet phase, and high ionic conductivity. This low area-specific resistance enables a solid-state garnet SSE/Li <span class="hlt">metal</span> configuration and promotes the development of a hybrid electrolyte system. The hybrid system uses the improved solid-state garnet SSE Li <span class="hlt">metal</span> anode and a thin liquid electrolyte cathode interfacial layer. This work provides new ways to address the garnet SSE wetting issue against Li and get more stable cell performances <span class="hlt">based</span> on the hybrid electrolyte system for Li-ion, Li-sulfur, and Li-oxygen batteries toward the next generation of Li <span class="hlt">metal</span> batteries.« less</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/pages/biblio/1425393-toward-garnet-electrolytebased-li-metal-batteries-ultrathin-highly-effective-artificial-solid-state-electrolyte-metallic-li-interface','SCIGOV-DOEP'); return false;" href="https://www.osti.gov/pages/biblio/1425393-toward-garnet-electrolytebased-li-metal-batteries-ultrathin-highly-effective-artificial-solid-state-electrolyte-metallic-li-interface"><span>Toward garnet electrolyte–<span class="hlt">based</span> Li <span class="hlt">metal</span> batteries: An ultrathin, highly effective, artificial solid-state electrolyte/<span class="hlt">metallic</span> Li interface</span></a></p> <p><a target="_blank" href="http://www.osti.gov/pages">DOE PAGES</a></p> <p>Fu, Kun; Gong, Yunhui; Liu, Boyang; ...</p> <p>2017-04-07</p> <p>Solid-state batteries are a promising option toward high energy and power densities due to the use of lithium (Li) <span class="hlt">metal</span> as an anode. Among all solid electrolyte materials ranging from <span class="hlt">sulfides</span> to oxides and oxynitrides, cubic garnet–type Li 7La 3Zr 2O 12 (LLZO) ceramic electrolytes are superior candidates because of their high ionic conductivity (10 -3 to 10 -4 S/cm) and good stability against Li <span class="hlt">metal</span>. However, garnet solid electrolytes generally have poor contact with Li <span class="hlt">metal</span>, which causes high resistance and uneven current distribution at the interface. To address this challenge, we demonstrate a strategy to engineer the garnetmore » solid electrolyte and the Li <span class="hlt">metal</span> interface by forming an intermediary Li-<span class="hlt">metal</span> alloy, which changes the wettability of the garnet surface (lithiophobic to lithiophilic) and reduces the interface resistance by more than an order of magnitude: 950 ohm·cm2 for the pristine garnet/Li and 75 ohm·cm 2 for the surface-engineered garnet/Li. Li 7La 2.75Ca 0.25Zr 1.75Nb 0.25O 12 (LLCZN) was selected as the solid-state electrolyte (SSE) in this work because of its low sintering temperature, stabilized cubic garnet phase, and high ionic conductivity. This low area-specific resistance enables a solid-state garnet SSE/Li <span class="hlt">metal</span> configuration and promotes the development of a hybrid electrolyte system. The hybrid system uses the improved solid-state garnet SSE Li <span class="hlt">metal</span> anode and a thin liquid electrolyte cathode interfacial layer. This work provides new ways to address the garnet SSE wetting issue against Li and get more stable cell performances <span class="hlt">based</span> on the hybrid electrolyte system for Li-ion, Li-sulfur, and Li-oxygen batteries toward the next generation of Li <span class="hlt">metal</span> batteries.« less</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/28552307','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/28552307"><span>Magnetic MoS2 on multiwalled carbon nanotubes for <span class="hlt">sulfide</span> sensing.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Li, Chunxiang; Zhang, Dan; Wang, Jiankang; Hu, Pingan; Jiang, Zhaohua</p> <p>2017-07-04</p> <p>A novel hybrid <span class="hlt">metallic</span> cobalt insided in multiwalled carbon nanotubles/molybdenum disulfide (Co@CNT/MoS 2 ) modified glass carbon electrode (GCE) was fabricated with a adhesive of Nafion suspension and used as chemical sensors for <span class="hlt">sulfide</span> detection. Single-layered MoS 2 was coated on CNTs through magnetic traction force between paramagnetic monolayer MoS 2 and Co particles in CNTs. Co particles faciliated the collection of paramagnetic monolayer MoS 2 exfoliated from bulk MoS 2 in solution. Amperometric analysis, cycle voltammetry, cathodic stripping analysis and linear sweep voltammetry results showed the Co@CNT/MoS 2 modified GCE exhibited excellent electrochemical activity to <span class="hlt">sulfide</span> in buffer solutions, but amperometric analysis was found to be more sensitive than the other methods. The amperometric response result indicated the Co@CNT/MoS 2 -modified GCE electrode was an excellent electrochemical sensor for detecting S 2- with a detection limit of 7.6 nM and sensitivity of 0.23 mA/μM. The proposed electrode was used for the determination of <span class="hlt">sulfide</span> levels in hydrogen <span class="hlt">sulfide</span>-pretreated fruits, and the method was also verified with recovery studies. Copyright © 2017 Elsevier B.V. All rights reserved.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/27829566','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/27829566"><span>A novel peptide-<span class="hlt">based</span> fluorescence chemosensor for selective imaging of hydrogen <span class="hlt">sulfide</span> both in living cells and zebrafish.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Wang, Peng; Wu, Jiang; Di, Cuixia; Zhou, Rong; Zhang, Hong; Su, Pingru; Xu, Cong; Zhou, Panpan; Ge, Yushu; Liu, Dan; Liu, Weisheng; Tang, Yu</p> <p>2017-06-15</p> <p>Hydrogen <span class="hlt">sulfide</span> (H 2 S) plays an important role as a signaling compound (gasotransmitter) in living systems. However, the development of an efficient imaging chemosensor of H 2 S in live animals is a challenging field for chemists. Herein, a novel peptide-<span class="hlt">based</span> fluorescence chemosensor L-Cu was designed and synthesized on the basis of the copper chelating with the peptide ligand (FITC-Ahx-Ser-Pro-Gly-His-NH 2 , L), and its H 2 S sensing ability has been evaluated both in living cells and zebrafish. The peptide backbone and Cu 2+ -removal sensing mechanism are used to deliver rapid response time, high sensitivity, and good biocompatibility. After a fast fluorescence quench by Cu 2+ coordinated with L, the fluorescence of L is recovered by adding S 2- to form insoluble copper <span class="hlt">sulfide</span> in aqueous solution with a detection limit for hydrogen <span class="hlt">sulfide</span> measured to be 31nM. Furthermore, the fluorescence chemosensor L-Cu showed excellent cell permeation and low biotoxicity to realize the intracellular biosensing, L-Cu has also been applied to image hydrogen <span class="hlt">sulfide</span> in live zebrafish larvae. We expect that this peptide-<span class="hlt">based</span> fluorescence chemosensor L-Cu can be used to study H 2 S-related chemical biology in physiological and pathological events. Copyright © 2016 Elsevier B.V. All rights reserved.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=5445864','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=5445864"><span>Luminescence in <span class="hlt">Sulfides</span>: A Rich History and a Bright Future</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Smet, Philippe F.; Moreels, Iwan; Hens, Zeger; Poelman, Dirk</p> <p>2010-01-01</p> <p><span class="hlt">Sulfide-based</span> luminescent materials have attracted a lot of attention for a wide range of photo-, cathodo- and electroluminescent applications. Upon doping with Ce3+ and Eu2+, the luminescence can be varied over the entire visible region by appropriately choosing the composition of the <span class="hlt">sulfide</span> host. Main application areas are flat panel displays <span class="hlt">based</span> on thin film electroluminescence, field emission displays and ZnS-<span class="hlt">based</span> powder electroluminescence for backlights. For these applications, special attention is given to BaAl2S4:Eu, ZnS:Mn and ZnS:Cu. Recently, <span class="hlt">sulfide</span> materials have regained interest due to their ability (in contrast to oxide materials) to provide a broad band, Eu2+-<span class="hlt">based</span> red emission for use as a color conversion material in white-light emitting diodes (LEDs). The potential application of rare-earth doped binary alkaline-earth <span class="hlt">sulfides</span>, like CaS and SrS, thiogallates, thioaluminates and thiosilicates as conversion phosphors is discussed. Finally, this review concludes with the size-dependent luminescence in intrinsic colloidal quantum dots like PbS and CdS, and with the luminescence in doped nanoparticles.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://pubs.er.usgs.gov/publication/70189891','USGSPUBS'); return false;" href="https://pubs.er.usgs.gov/publication/70189891"><span>Formation of mercury <span class="hlt">sulfide</span> from Hg(II)−thiolate complexes in natural organic matter</span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Alain Manceau,; Cyprien Lemouchi,; Mironel Enescu,; Anne-Claire Gaillot,; Martine Lanson,; Valerie Magnin,; Pieter Glatzel,; Poulin, Brett; Ryan, Joseph N.; Aiken, George R.; Isabelle Gautier-Lunea,; Kathryn L. Nagy,</p> <p>2015-01-01</p> <p>Methylmercury is the environmental form of neurotoxic mercury that is biomagnified in the food chain. Methylation rates are reduced when the <span class="hlt">metal</span> is sequestered in crystalline mercury <span class="hlt">sulfides</span> or bound to thiol groups in macromolecular natural organic matter. Mercury <span class="hlt">sulfide</span> minerals are known to nucleate in anoxic zones, by reaction of the thiol-bound mercury with biogenic <span class="hlt">sulfide</span>, but not in oxic environments. We present experimental evidence that mercury <span class="hlt">sulfide</span> forms from thiol-bound mercury alone in aqueous dark systems in contact with air. The maximum amount of nanoparticulate mercury <span class="hlt">sulfide</span> relative to thiol-bound mercury obtained by reacting dissolved mercury and soil organic matter matches that detected in the organic horizon of a contaminated soil situated downstream from Oak Ridge, TN, in the United States. The nearly identical ratios of the two forms of mercury in field and experimental systems suggest a common reaction mechanism for nucleating the mineral. We identified a chemical reaction mechanism that is thermodynamically favorable in which thiol-bound mercury polymerizes to mercury–sulfur clusters. The clusters form by elimination of sulfur from the thiol complexes via breaking of mercury–sulfur bonds as in an alkylation reaction. Addition of <span class="hlt">sulfide</span> is not required. This nucleation mechanism provides one explanation for how mercury may be immobilized, and eventually sequestered, in oxygenated surface environments.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2009ECSS...85..319H','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2009ECSS...85..319H"><span><span class="hlt">Sulfide</span> intrusion in the tropical seagrasses Thalassia testudinum and Syringodium filiforme</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Holmer, Marianne; Pedersen, Ole; Krause-Jensen, Dorte; Olesen, Birgit; Hedegård Petersen, Malene; Schopmeyer, Stephanie; Koch, Marguerite; Lomstein, Bente Aa.; Jensen, Henning S.</p> <p>2009-11-01</p> <p>Sulfur and oxygen dynamics in the seagrasses Thalassia testudinum and Syringodium filiforme and their sediments were studied in the US Virgin Islands (USVI) in order to explore <span class="hlt">sulfide</span> intrusion into tropical seagrasses. Four study sites were selected <span class="hlt">based</span> on the iron concentration in sediments and on proximity to anthropogenic nutrient sources. Meadow characteristics (shoot density, above- and below-ground biomass, nutrient content) were sampled along with sediment biogeochemistry. <span class="hlt">Sulfide</span> intrusion was high in T. testudinum, as up to 96% of total sulfur in the plant was derived from sediment-derived <span class="hlt">sulfides</span>. The <span class="hlt">sulfide</span> intrusion was negatively correlated to the turnover of <span class="hlt">sulfides</span> in the sediments regulated by both plant parameters and sediment sulfur pools. Sediment iron content played an indirect role by affecting <span class="hlt">sulfide</span> turnover rates. Leaf production was negatively correlated with <span class="hlt">sulfide</span> intrusion suggesting that active growth reduced <span class="hlt">sulfide</span> intrusion. <span class="hlt">Sulfide</span> intrusion was lower in S. filiforme (up to 44%) compared to T. testudinum consistent with a higher internal nighttime oxygen concentrations found for S. filiforme. When S. filiforme can take advantage of its ability to maintain high internal oxygen concentrations, as was the case on the USVI, it could increase its success in colonizing unvegetated disturbed sediments with potentially high <span class="hlt">sulfide</span> concentrations.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2002GeCoA..66.2791R','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2002GeCoA..66.2791R"><span>Copper solubility in a basaltic melt and <span class="hlt">sulfide</span> liquid/silicate melt partition coefficients of Cu and Fe</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Ripley, Edward M.; Brophy, James G.; Li, Chusi</p> <p>2002-09-01</p> <p>The solubility of copper in a sulfur-saturated basaltic melt has been determined at 1245°C as a function of fO 2 and fS 2. Copper solubilities at log fO 2 values between -8 and -11 fall into two distinct populations as a function of fS 2. At log fS 2 values < -1.65, <span class="hlt">sulfide</span> liquid that coexists with the basaltic glass quenches to sulfur-poor bornite solid solution. At log fS 2 values in excess of -1.65, the <span class="hlt">sulfide</span> liquid quenches to a complex intergrowth of sulfur-rich bornite and intermediate solid solution. Copper solubilities in the low-fS 2 population range from 594 to 1550 ppm, whereas those in the high-fS 2 population range from 80 to 768 ppm. <span class="hlt">Sulfide</span> liquid/silicate liquid partition coefficients (D) for Cu and Fe range from 480 to 1303 and 0.7 to 13.6, respectively. <span class="hlt">Metal</span>-sulfur complexing in the silicate liquid is shown to be insignificant relative to <span class="hlt">metal</span>-oxide complexing for Fe but permissible for Cu at high fS 2 values. On log D Fe (<span class="hlt">sulfide</span>-silicate) and log D Cu (<span class="hlt">sulfide</span>-silicate) vs. 1/2 (log fS 2 - log fO 2) diagrams, both fS 2 populations show distinct but parallel trends. The observation of two D values for any fS 2/fO 2 ratio indicates nonideal mixing of species involved in the exchange reaction. The two distinct trends observed for both Cu and Fe are thought to be due to variations in activity coefficient ratios (e.g., γ FeO/γ FeS and γ CuO 0.5/γ CuS 0.5). Results of the experiments suggest that accurate assessments of fS 2/fO 2 ratios are required for the successful numerical modeling of processes such as the partial melting of <span class="hlt">sulfide</span>-bearing mantle and the crystallization of <span class="hlt">sulfide</span>-bearing magmas, as well as the interpretation of <span class="hlt">sulfide</span> mineralogical zoning. In addition, the experiments provide evidence for oxide or oxy-<span class="hlt">sulfide</span> complexing for Cu in silicate magmas and suggest that the introduction of externally derived sulfur to mafic magma may be an important process for the formation of Cu-rich disseminated magmatic <span class="hlt">sulfide</span> ore</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/24361702','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/24361702"><span><span class="hlt">Sulfide</span> response analysis for <span class="hlt">sulfide</span> control using a pS electrode in sulfate reducing bioreactors.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Villa-Gomez, D K; Cassidy, J; Keesman, K J; Sampaio, R; Lens, P N L</p> <p>2014-03-01</p> <p>Step changes in the organic loading rate (OLR) through variations in the influent chemical oxygen demand (CODin) concentration or in the hydraulic retention time (HRT) at constant COD/SO4(2-) ratio (0.67) were applied to create <span class="hlt">sulfide</span> responses for the design of a <span class="hlt">sulfide</span> control in sulfate reducing bioreactors. The <span class="hlt">sulfide</span> was measured using a <span class="hlt">sulfide</span> ion selective electrode (pS) and the values obtained were used to calculate proportional-integral-derivative (PID) controller parameters. The experiments were performed in an inverse fluidized bed bioreactor with automated operation using the LabVIEW software version 2009(®). A rapid response and high <span class="hlt">sulfide</span> increment was obtained through a stepwise increase in the CODin concentration, while a stepwise decrease to the HRT exhibited a slower response with smaller <span class="hlt">sulfide</span> increment. Irrespective of the way the OLR was decreased, the pS response showed a time-varying behavior due to <span class="hlt">sulfide</span> accumulation (HRT change) or utilization of substrate sources that were not accounted for (CODin change). The pS electrode response, however, showed to be informative for applications in sulfate reducing bioreactors. Nevertheless, the recorded pS values need to be corrected for pH variations and high <span class="hlt">sulfide</span> concentrations (>200 mg/L). Copyright © 2013 Elsevier Ltd. All rights reserved.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://pubs.er.usgs.gov/publication/70029196','USGSPUBS'); return false;" href="https://pubs.er.usgs.gov/publication/70029196"><span>Direct observation of heavy <span class="hlt">metal</span>-mineral association from the Clark Fork River Superfund Complex: Implications for <span class="hlt">metal</span> transport and bioavailability</span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Hochella, M.F.; Moore, J.N.; Putnis, C.V.; Putnis, A.; Kasama, T.; Eberl, D.D.</p> <p>2005-01-01</p> <p>Two sets of samples from riverbeds and adjacent floodplains, separated by 80 river kilometers, were collected from the Clark Fork River Superfund Complex, Montana, (the largest Superfund site in the United States), and studied primarily with transmission electron microscopy (TEM) with several supporting techniques to determine heavy <span class="hlt">metal</span>-mineral association. Seven of the eight samples studied were strongly influenced by material that once resided in mining and smelting dumps and impoundments; this material was transported downstream sometime during the last century and a half from the Butte/Anaconda areas. The eighth sample was from a deeper floodplain level and dates to premining days. The TEM observations afford a direct look, down to the nanometer level, at secondary mineral formation as a result of the breakdown of <span class="hlt">sulfides</span> and silicates in the acid environment of this massive mine-drainage system. In the shallow, oxic floodplain sediments, heavy <span class="hlt">metals</span> of concern in this system (As, Cu, Pb, and Zn) are taken up by the formation of sulfates (particularly Pb in jarosite), as well as hydrous <span class="hlt">metal</span> oxides (As, Cu, Pb, and Zn in and on ferrihydrite, and a possibly new vernadite-like mineral). The oxides are long-lived in these systems, as they were also found in the anoxic riverbeds. <span class="hlt">Metals</span> are also taken up by the formation of <span class="hlt">sulfides</span> in sulfate-reducing environments as observed in the formation of nanoclusters of chalcopyrite and sphalerite. In all samples, clays make up between 5 and 20% of the sediment and carry significant amounts of Cu and Zn. The hydrous oxides, secondary <span class="hlt">sulfides</span>, and clays provide several routes for <span class="hlt">metal</span> transport downstream over long distances. Besides the potential bioavailability of heavy <span class="hlt">metals</span> exchanged on and off the hydrous <span class="hlt">metal</span> oxides and clays, nanometer-sized <span class="hlt">sulfides</span> may also be highly reactive in the presence of biologic systems. Copyright ?? 2005 Elsevier Ltd.</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_18");'>18</a></li> <li><a href="#" onclick='return showDiv("page_19");'>19</a></li> <li class="active"><span>20</span></li> <li><a href="#" onclick='return showDiv("page_21");'>21</a></li> <li><a href="#" onclick='return showDiv("page_22");'>22</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_20 --> <div id="page_21" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_19");'>19</a></li> <li><a href="#" onclick='return showDiv("page_20");'>20</a></li> <li class="active"><span>21</span></li> <li><a href="#" onclick='return showDiv("page_22");'>22</a></li> <li><a href="#" onclick='return showDiv("page_23");'>23</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="401"> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/29477793','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/29477793"><span>Improved <span class="hlt">sulfide</span> mitigation in sewers through on-line control of ferrous salt dosing.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Ganigué, Ramon; Jiang, Guangming; Liu, Yiqi; Sharma, Keshab; Wang, Yue-Cong; Gonzalez, José; Nguyen, Tung; Yuan, Zhiguo</p> <p>2018-05-15</p> <p>Water utilities worldwide spend annually billions of dollars to control <span class="hlt">sulfide</span>-induced corrosion in sewers. Iron salts chemically oxidize and/or precipitate dissolved <span class="hlt">sulfide</span> in sewage and are especially used in medium- and large-size sewers. Iron salt dosing rates are defined ad hoc, ignoring variation in sewage flows and <span class="hlt">sulfide</span> levels. This often results in iron overdosing or poor <span class="hlt">sulfide</span> control. Online dosing control can adjust the chemical dosing rates to current (and future) state of the sewer system, allowing high-precision, stable and cost-effective <span class="hlt">sulfide</span> control. In this paper, we report a novel and robust online control strategy for the dosing of ferrous salt in sewers. The control considers the fluctuation of sewage flow, pH, <span class="hlt">sulfide</span> levels and also the perturbation from rainfall. <span class="hlt">Sulfide</span> production in the pipe is predicted using auto-regressive models (AR) <span class="hlt">based</span> on current flow measurements, which in turn can be used to determine the dose of ferrous salt required for cost-effective <span class="hlt">sulfide</span> control. Following comprehensive model-<span class="hlt">based</span> assesment, the control was successfully validated and its effectiveness demonstrated in a 3-week field trial. The online control algorithm controlled <span class="hlt">sulfide</span> below the target level (0.5 mg S/L) while reducing chemical dosing up to 30%. Copyright © 2018 Elsevier Ltd. All rights reserved.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/27933192','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/27933192"><span>Randomised comparison of drug-eluting versus bare-<span class="hlt">metal</span> stenting in patients with non-ST elevation myocardial infarction.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Remkes, Wouter S; Badings, Erik A; Hermanides, Renicus S; Rasoul, Saman; Dambrink, Jan-Henk E; Koopmans, Petra C; The, Salem Hk; Ottervanger, Jan Paul; Gosselink, A T Marcel; Hoorntje, Jan Ca; Suryapranata, Harry; van 't Hof, Arnoud Wj</p> <p>2016-01-01</p> <p>The superiority of drug-eluting stents (DES) over bare-<span class="hlt">metal</span> stents (<span class="hlt">BMS</span>) in patients with ST elevation myocardial infarction (STEMI) is well studied; however, randomised data in patients with non-ST elevation myocardial infarction (NSTEMI) are lacking. The objective of this study was to investigate whether stenting with everolimus-eluting stents (EES) safely reduces restenosis in patients with NSTEMI as compared to <span class="hlt">BMS</span>. ELISA-3 patients were asked to participate in the angiographic substudy and were randomised to DE (Xience V) or BM (Vision) stenting (ELISA-3 group). The primary end point was minimal luminal diameter (MLD) at 9-month follow-up angiography. In addition, 296 patients with NSTEMI who were excluded or did not want to participate in the ELISA-3 trial (RELI group) were randomised to DE or BM stenting and underwent clinical follow-up only (major adverse cardiac events (MACE), stent thrombosis (ST)). A pooled analysis was performed to assess an effect on clinical outcome. 178 of 540 ELISA-3 patients participated in the angiographic substudy. MLD at 9 months angiography was 2.37±0.63 mm (DES) versus 1.84±0.62 mm (<span class="hlt">BMS</span>), p<0.001. Binary restenosis occurred in 1.9% in the DES group versus 16.7% in the <span class="hlt">BMS</span> group (RR 0.11, 95% CI 0.02 to 0.84, p=0.007). In the pooled analysis, the incidence of MACE, target vessel revascularisation and ST at 2 years follow-up in the DES versus <span class="hlt">BMS</span> group was 12.5% versus 16.0% (p=0.28), 4.0% versus 10.4% (p=0.009) and 1.3% versus 3.0% (p=0.34), respectively. In patients with NSTEMI, use of EES is safe and decreases both angiographic and clinical restenosis as compared to <span class="hlt">BMS</span> http://www.isrctn.com/search?q=39230163. 39230163; Post-results.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/biblio/1376191-kinetically-driven-phase-transformation-during-lithiation-copper-sulfide-nanoflakes','SCIGOV-STC'); return false;" href="https://www.osti.gov/biblio/1376191-kinetically-driven-phase-transformation-during-lithiation-copper-sulfide-nanoflakes"><span>Kinetically-Driven Phase Transformation during Lithiation in Copper <span class="hlt">Sulfide</span> Nanoflakes</span></a></p> <p><a target="_blank" href="http://www.osti.gov/search">DOE Office of Scientific and Technical Information (OSTI.GOV)</a></p> <p>He, Kai; Yao, Zhenpeng; Hwang, Sooyeon</p> <p></p> <p>Two-dimensional (2D) transition <span class="hlt">metal</span> chalcogenides have been widely studied and utilized as electrode materials for lithium ion batteries due to their unique layered structures to accommodate reversible lithium insertion. Real-time observation and mechanistic understanding of the phase transformations during lithiation of these materials are critically important for improving battery performance by controlling structures and reaction pathways. Here, we use in situ transmission electron microscopy methods to study the structural, morphological, and chemical evolutions in individual copper <span class="hlt">sulfide</span> (CuS) nanoflakes during lithiation. We report a highly kinetically driven phase transformation in which lithium ions rapidly intercalate into the 2D van dermore » Waals-stacked interlayers in the initial stage, and further lithiation induces the Cu extrusion via a displacement reaction mechanism that is different from the typical conversion reactions. Density functional theory calculations have confirmed both the thermodynamically favored and the kinetically driven reaction pathways. Lastly, our findings elucidate the reaction pathways of the Li/CuS system under nonequilibrium conditions and provide valuable insight into the atomistic lithiation mechanisms of transition <span class="hlt">metal</span> <span class="hlt">sulfides</span> in general.« less</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/pages/biblio/1376191-kinetically-driven-phase-transformation-during-lithiation-copper-sulfide-nanoflakes','SCIGOV-DOEP'); return false;" href="https://www.osti.gov/pages/biblio/1376191-kinetically-driven-phase-transformation-during-lithiation-copper-sulfide-nanoflakes"><span>Kinetically-Driven Phase Transformation during Lithiation in Copper <span class="hlt">Sulfide</span> Nanoflakes</span></a></p> <p><a target="_blank" href="http://www.osti.gov/pages">DOE PAGES</a></p> <p>He, Kai; Yao, Zhenpeng; Hwang, Sooyeon; ...</p> <p>2017-08-11</p> <p>Two-dimensional (2D) transition <span class="hlt">metal</span> chalcogenides have been widely studied and utilized as electrode materials for lithium ion batteries due to their unique layered structures to accommodate reversible lithium insertion. Real-time observation and mechanistic understanding of the phase transformations during lithiation of these materials are critically important for improving battery performance by controlling structures and reaction pathways. Here, we use in situ transmission electron microscopy methods to study the structural, morphological, and chemical evolutions in individual copper <span class="hlt">sulfide</span> (CuS) nanoflakes during lithiation. We report a highly kinetically driven phase transformation in which lithium ions rapidly intercalate into the 2D van dermore » Waals-stacked interlayers in the initial stage, and further lithiation induces the Cu extrusion via a displacement reaction mechanism that is different from the typical conversion reactions. Density functional theory calculations have confirmed both the thermodynamically favored and the kinetically driven reaction pathways. Lastly, our findings elucidate the reaction pathways of the Li/CuS system under nonequilibrium conditions and provide valuable insight into the atomistic lithiation mechanisms of transition <span class="hlt">metal</span> <span class="hlt">sulfides</span> in general.« less</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=5666145','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=5666145"><span>Cupriavidus necator H16 Uses Flavocytochrome c <span class="hlt">Sulfide</span> Dehydrogenase To Oxidize Self-Produced and Added <span class="hlt">Sulfide</span></span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Lü, Chuanjuan; Xia, Yongzhen; Liu, Daixi; Zhao, Rui; Gao, Rui</p> <p>2017-01-01</p> <p>ABSTRACT Production of <span class="hlt">sulfide</span> (H2S, HS−, and S2−) by heterotrophic bacteria during aerobic growth is a common phenomenon. Some bacteria with <span class="hlt">sulfide</span>:quinone oxidoreductase (SQR) and persulfide dioxygenase (PDO) can oxidize self-produced <span class="hlt">sulfide</span> to sulfite and thiosulfate, but other bacteria without these enzymes release <span class="hlt">sulfide</span> into the medium, from which H2S can volatilize into the gas phase. Here, we report that Cupriavidus necator H16, with the fccA and fccB genes encoding flavocytochrome c <span class="hlt">sulfide</span> dehydrogenases (FCSDs), also oxidized self-produced H2S. A mutant in which fccA and fccB were deleted accumulated and released H2S. When fccA and fccB were expressed in Pseudomonas aeruginosa strain Pa3K with deletions of its sqr and pdo genes, the recombinant rapidly oxidized <span class="hlt">sulfide</span> to sulfane sulfur. When PDO was also cloned into the recombinant, the recombinant with both FCSD and PDO oxidized <span class="hlt">sulfide</span> to sulfite and thiosulfate. Thus, the proposed pathway is similar to the pathway catalyzed by SQR and PDO, in which FCSD oxidizes <span class="hlt">sulfide</span> to polysulfide, polysulfide spontaneously reacts with reduced glutathione (GSH) to produce glutathione persulfide (GSSH), and PDO oxidizes GSSH to sulfite, which chemically reacts with polysulfide to produce thiosulfate. About 20.6% of sequenced bacterial genomes contain SQR, and only 3.9% contain FCSD. This is not a surprise, since SQR is more efficient in conserving energy because it passes electrons from <span class="hlt">sulfide</span> oxidation into the electron transport chain at the quinone level, while FCSD passes electrons to cytochrome c. The transport of electrons from the latter to O2 conserves less energy. FCSDs are grouped into three subgroups, well conserved at the taxonomic level. Thus, our data show the diversity in <span class="hlt">sulfide</span> oxidation by heterotrophic bacteria. IMPORTANCE Heterotrophic bacteria with SQR and PDO can oxidize self-produced <span class="hlt">sulfide</span> and do not release H2S into the gas phase. C. necator H16 has FCSD but not SQR, and it does</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2016IJMMM..23..609F','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2016IJMMM..23..609F"><span>A novel method for improving cerussite <span class="hlt">sulfidization</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Feng, Qi-cheng; Wen, Shu-ming; Zhao, Wen-juan; Cao, Qin-bo; Lü, Chao</p> <p>2016-06-01</p> <p>Evaluation of flotation behavior, solution measurements, and surface analyses were performed to investigate the effects of chloride ion addition on the <span class="hlt">sulfidization</span> of cerussite in this study. Micro-flotation tests indicate that the addition of chloride ions prior to <span class="hlt">sulfidization</span> can significantly increase the flotation recovery of cerussite, which is attributed to the formation of more lead <span class="hlt">sulfide</span> species on the mineral surface. Solution measurement results suggest that the addition of chloride ions prior to <span class="hlt">sulfidization</span> induces the transformation of more <span class="hlt">sulfide</span> ions from pulp solution onto the mineral surface by the formation of more lead <span class="hlt">sulfide</span> species. X-ray diffraction and energy-dispersive spectroscopy indicate that more lead <span class="hlt">sulfide</span> species form on the mineral surface when chloride ions are added prior to <span class="hlt">sulfidization</span>. These results demonstrate that the addition of chloride ions prior to <span class="hlt">sulfidization</span> can significantly improve the <span class="hlt">sulfidization</span> of cerussite, thereby enhancing the flotation performance.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2018NuPhB.926...70S','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2018NuPhB.926...70S"><span>Enhanced asymptotic <span class="hlt">BMS</span>3 algebra of the flat spacetime solutions of generalized minimal massive gravity</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Setare, M. R.; Adami, H.</p> <p>2018-01-01</p> <p>We apply the new fall of conditions presented in the paper [1] on asymptotically flat spacetime solutions of Chern-Simons-like theories of gravity. We show that the considered fall of conditions asymptotically solve equations of motion of generalized minimal massive gravity. We demonstrate that there exist two type of solutions, one of those is trivial and the others are non-trivial. By looking at non-trivial solutions, for asymptotically flat spacetimes in the generalized minimal massive gravity, in contrast to Einstein gravity, cosmological parameter can be non-zero. We obtain the conserved charges of the asymptotically flat spacetimes in generalized minimal massive gravity, and by introducing Fourier modes we show that the asymptotic symmetry algebra is a semidirect product of a <span class="hlt">BMS</span>3 algebra and two U (1) current algebras. Also we verify that the <span class="hlt">BMS</span>3 algebra can be obtained by a contraction of the AdS3 asymptotic symmetry algebra when the AdS3 radius tends to infinity in the flat-space limit. Finally we find energy, angular momentum and entropy for a particular case and deduce that these quantities satisfy the first law of flat space cosmologies.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/28892798','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/28892798"><span>A novel method for the sequential removal and separation of multiple heavy <span class="hlt">metals</span> from wastewater.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Fang, Li; Li, Liang; Qu, Zan; Xu, Haomiao; Xu, Jianfang; Yan, Naiqiang</p> <p>2018-01-15</p> <p>A novel method was developed and applied for the treatment of simulated wastewater containing multiple heavy <span class="hlt">metals</span>. A sorbent of ZnS nanocrystals (NCs) was synthesized and showed extraordinary performance for the removal of Hg 2+ , Cu 2+ , Pb 2+ and Cd 2+ . The removal efficiencies of Hg 2+ , Cu 2+ , Pb 2+ and Cd 2+ were 99.9%, 99.9%, 90.8% and 66.3%, respectively. Meanwhile, it was determined that solubility product (K sp ) of heavy <span class="hlt">metal</span> <span class="hlt">sulfides</span> was closely related to adsorption selectivity of various heavy <span class="hlt">metals</span> on the sorbent. The removal efficiency of Hg 2+ was higher than that of Cd 2+ , while the K sp of HgS was lower than that of CdS. It indicated that preferential adsorption of heavy <span class="hlt">metals</span> occurred when the K sp of the heavy <span class="hlt">metal</span> <span class="hlt">sulfide</span> was lower. In addition, the differences in the K sp of heavy <span class="hlt">metal</span> <span class="hlt">sulfides</span> allowed for the exchange of heavy <span class="hlt">metals</span>, indicating the potential application for the sequential removal and separation of heavy <span class="hlt">metals</span> from wastewater. According to the cumulative adsorption experimental results, multiple heavy <span class="hlt">metals</span> were sequentially adsorbed and separated from the simulated wastewater in the order of the K sp of their <span class="hlt">sulfides</span>. This method holds the promise of sequentially removing and separating multiple heavy <span class="hlt">metals</span> from wastewater. Copyright © 2017 Elsevier B.V. All rights reserved.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/18576125','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/18576125"><span>A preliminary cost analysis of the biotreatment of refinery spent-<span class="hlt">sulfidic</span> caustic.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Sublette, K L</p> <p>1997-01-01</p> <p>Caustics are used in petroleum refining to remove hydrogen <span class="hlt">sulfide</span> from various hydrocarbon streams. Spent-<span class="hlt">sulfidic</span> caustics from three refineries have been successfully biotreated on the bench and pilot scale, resulting in neutralization and removal of active <span class="hlt">Sulfides</span>. <span class="hlt">Sulfides</span> were completely oxidized to sulfate by Thiobacillus denitrificans strain F. Microbial oxidation of <span class="hlt">sulfide</span> produced acid, which at least partially neutralized the caustic. A commercial-scale treatment system has been designed that features a bioreactor with a suspended culture of flocculated T. denitrificans, a settler and acid and nutrient storage and delivery systems. A cost analysis has been performed for nine cases representing a range of spent caustic <span class="hlt">sulfide</span> and hydroxide concentrations at a <span class="hlt">base</span> treatment rate of 10 gpm. This analysis shows that refinery spent-<span class="hlt">sulfidic</span> caustic can be biotreated for 4-8.3 cent/gal.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=5333357','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=5333357"><span>Precise tuning in platinum-nickel/nickel <span class="hlt">sulfide</span> interface nanowires for synergistic hydrogen evolution catalysis</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Wang, Pengtang; Zhang, Xu; Zhang, Jin; Wan, Sheng; Guo, Shaojun; Lu, Gang; Yao, Jianlin; Huang, Xiaoqing</p> <p>2017-01-01</p> <p>Comprising abundant interfaces, multicomponent heterostructures can integrate distinct building blocks into single entities and yield exceptional functionalities enabled by the synergistic components. Here we report an efficient approach to construct one-dimensional <span class="hlt">metal/sulfide</span> heterostructures by directly sulfuring highly composition-segregated platinum-nickel nanowires. The heterostructures possess a high density of interfaces between platinum-nickel and nickel <span class="hlt">sulfide</span> components, which cooperate synergistically towards alkaline hydrogen evolution reaction. The platinum-nickel/nickel <span class="hlt">sulfide</span> heterostructures can deliver a current density of 37.2 mA cm−2 at an overpotential of 70 mV, which is 9.7 times higher than that of commercial Pt/C. The heterostructures also offer enhanced stability revealed by long-term chronopotentiometry measurements. The present work highlights a potentially powerful interface-engineering strategy for designing multicomponent heterostructures with advanced performance in hydrogen evolution reaction and beyond. PMID:28239145</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2005MinDe..40..218L','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2005MinDe..40..218L"><span>Empirical equations to predict the sulfur content of mafic magmas at <span class="hlt">sulfide</span> saturation and applications to magmatic <span class="hlt">sulfide</span> deposits</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Li, Chusi; Ripley, Edward M.</p> <p>2005-03-01</p> <p>Empirical equations to predict the sulfur content of a mafic magma at the time of <span class="hlt">sulfide</span> saturation have been developed <span class="hlt">based</span> on several sets of published experimental data. The S content at <span class="hlt">sulfide</span> saturation (SCSS) can be expressed as: ln X_{text S} = 1.229 - 0.74(10^4/T) - 0.021(P) - 0.311 ln X_{{text{FeO}}} - 6.166X_{{text{SiO}}_{text{2}}} - 9.153X_{{text{Na}}_{text{2}} {text{O + K}}_{text{2}} {text{O}}} - 1.914X_{{text{MgO}}} + 6.594X_{{text{FeO}}} where T is in degrees Kelvin, X is mole fraction and P is in kbar. The squared multiple correlation coefficient ( r 2) for the equation is 0.88. Application of the equation to data from <span class="hlt">sulfide</span>-saturated mid-ocean ridge basalts (MORB) samples show that the SCSS is closely predicted for primitive MORBs, but that accuracy decreases for lower T (<1,130°C) and more evolved MORB samples. This suggests that because the calibrations are <span class="hlt">based</span> on anhydrous experimental runs done at temperatures of 1,200°C and above, it is not possible to extrapolate them to significantly lower temperatures and hydrous conditions. Because the SCSS of a primitive MORB magma increases with decreasing P, <span class="hlt">sulfide</span> saturation in MORB appears to be a function of the degree of en route assimilation of S from country rocks as well as the degree of fractional crystallization in shallow staging chambers. Application of the equation to the high- T impact melt sheet that produced the Sudbury Igneous Complex and associated Ni-Cu <span class="hlt">sulfide</span> ores indicates that <span class="hlt">sulfide</span>-saturation was reached at 1,500°C, well above the start of orthopyroxene crystallization at 1,190°C. This would permit ample time for the gravitational settling and collection of immiscible <span class="hlt">sulfide</span> liquid that produced the high-grade ore bodies. The development of a platinum group element (PGE)-enriched layer in the Sonju Lake Intrusion of the Duluth Complex is thought to be due to the attainment of <span class="hlt">sulfide</span> saturation in the magma after a period of fractional crystallization. Using the</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/28870640','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/28870640"><span>IVUS Findings in Late and Very Late Stent Thrombosis. A Comparison Between Bare-<span class="hlt">metal</span> and Drug-eluting Stents.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Fuentes, Lara; Gómez-Lara, Josep; Salvatella, Neus; Gonzalo, Nieves; Hernández-Hernández, Felipe; Fernández-Nofrerias, Eduard; Sánchez-Recalde, Ángel; Alfonso, Fernando; Romaguera, Rafael; Ferreiro, José Luis; Roura, Gerard; Teruel, Luis; Gracida, Montserrat; Marcano, Ana Lucrecia; Gómez-Hospital, Joan-Antoni; Cequier, Ángel</p> <p>2018-05-01</p> <p>Stent thrombosis (ST) is a life-threatening complication after stent implantation. Intravascular ultrasound is able to discern most causes of ST. The aim of this study was to compare intravascular ultrasound findings between bare-<span class="hlt">metal</span> stents (<span class="hlt">BMS</span>) and drug-eluting stents (DES) in patients with late (31 days to 1 year) or very late ST (> 1 year). Of 250 consecutive patients with late or very late ST in 7 Spanish institutions, 114 patients (45.5% <span class="hlt">BMS</span> and 54.5% DES) were imaged with intravascular ultrasound. Off-line intravascular ultrasound analysis was performed to assess malapposition, underexpansion, and neoatherosclerosis. The median time from stent implantation to ST was 4.0 years with <span class="hlt">BMS</span> and 3.4 years with DES (P = .04). Isolated malapposition was similarly observed in both groups (36.5% vs 46.8%; P = .18) but was numerically lower with <span class="hlt">BMS</span> (26.6% vs 48.0%; P = .07) in patients with very late ST. Isolated underexpansion was similarly observed in both groups (13.5% vs 11.3%; P = .47). Isolated neoatherosclerosis occurred only in patients with very late ST and was more prevalent with <span class="hlt">BMS</span> (22.9%) than with DES (6.0%); P = .02. At 2.9 years' follow-up, there were 0% and 6.9% cardiac deaths, respectively (P = .06) and recurrent ST occurred in 4.0% and 5.2% of patients, respectively (P = .60). Malapposition was the most common finding in patients with late and very late ST and is more prevalent with DES in very late ST. In contrast, neoatherosclerosis was exclusively observed in patients with very late ST and mainly with <span class="hlt">BMS</span>. Copyright © 2017 Sociedad Española de Cardiología. Published by Elsevier España, S.L.U. All rights reserved.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/27621830','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/27621830"><span>Cost-effectiveness of drug-eluting stents versus bare-<span class="hlt">metal</span> stents in patients undergoing percutaneous coronary intervention.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Baschet, Louise; Bourguignon, Sandrine; Marque, Sébastien; Durand-Zaleski, Isabelle; Teiger, Emmanuel; Wilquin, Fanny; Levesque, Karine</p> <p>2016-01-01</p> <p>To determine the cost-effectiveness of drug-eluting stents (DES) compared with bare-<span class="hlt">metal</span> stents (<span class="hlt">BMS</span>) in patients requiring a percutaneous coronary intervention in France, using a recent meta-analysis including second-generation DES. A cost-effectiveness analysis was performed in the French National Health Insurance setting. Effectiveness settings were taken from a meta-analysis of 117 762 patient-years with 76 randomised trials. The main effectiveness criterion was major cardiac event-free survival. Effectiveness and costs were modelled over a 5-year horizon using a three-state Markov model. Incremental cost-effectiveness ratios and a cost-effectiveness acceptability curve were calculated for a range of thresholds for willingness to pay per year without major cardiac event gain. Deterministic and probabilistic sensitivity analyses were performed. <span class="hlt">Base</span> case results demonstrated that DES are dominant over <span class="hlt">BMS</span>, with an increase in event-free survival and a cost-reduction of €184, primarily due to a diminution of second revascularisations, and an absence of myocardial infarction and stent thrombosis. These results are robust for uncertainty on one-way deterministic and probabilistic sensitivity analyses. Using a cost-effectiveness threshold of €7000 per major cardiac event-free year gained, DES has a >95% probability of being cost-effective versus <span class="hlt">BMS</span>. Following DES price decrease, new-generation DES development and taking into account recent meta-analyses results, the DES can now be considered cost-effective regardless of selective indication in France, according to European recommendations.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/27611357','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/27611357"><span>Decrease of dissolved <span class="hlt">sulfide</span> in sewage by powdered natural magnetite and hematite.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Zhang, Lehua; Verstraete, Willy; de Lourdes Mendoza, María; Lu, Zhihao; Liu, Yongdi; Huang, Guangtuan; Cai, Lankun</p> <p>2016-12-15</p> <p>Natural magnetite and hematite were explored to decrease <span class="hlt">sulfide</span> in sewage, compared with iron salts (FeCl 3 and FeSO 4 ). A particle size of magnetite and hematite ranging from 45 to 60μm was used. The results showed that 40mgL -1 of powdered magnetite and hematite addition decreased the <span class="hlt">sulfide</span> in sewage by 79%and 70%, respectively. The achieved decrease of <span class="hlt">sulfide</span> production capacities were 197.3, 210.6, 317.6 and 283.3mgSg -1 Fe for magnetite, hematite, FeCl 3 and FeSO 4 at the optimal dosage of 40mgL -1 , respectively. Magnetite and hematite provided a higher decrease of <span class="hlt">sulfide</span> production since more iron ions are capable of being released from the solid phase, not because of adsorption capacity of per gram iron. Besides, the impact on pH and oxidation-reduction potential (ORP) of hematite addition was negligible; while magnetite addition resulted in slight increase of 0.3-0.5 on pH and 10-40mV on ORP. Powdered magnetite and hematite thus appear to be suitable for <span class="hlt">sulfide</span> decrease in sewage, for their sparing solubility, sustained-release, long reactive time in sewage as well as cost-effectiveness, compared with iron salts. Further investigation over long time periods under practical conditions are needed to evaluate the possible settlement in sewers and unwanted (toxic) <span class="hlt">metal</span> elements presenting as impurities. Powdered magnetite and hematite were more cost-effective at only 30% costs of iron salts, such as FeCl 3 and FeSO 4 for decreasing <span class="hlt">sulfide</span> production in sewage. Copyright © 2016. Published by Elsevier B.V.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/26482000','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/26482000"><span>Lanthanide complexes as luminogenic probes to measure <span class="hlt">sulfide</span> levels in industrial samples.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Thorson, Megan K; Ung, Phuc; Leaver, Franklin M; Corbin, Teresa S; Tuck, Kellie L; Graham, Bim; Barrios, Amy M</p> <p>2015-10-08</p> <p>A series of lanthanide-<span class="hlt">based</span>, azide-appended complexes were investigated as hydrogen <span class="hlt">sulfide</span>-sensitive probes. Europium complex 1 and Tb complex 3 both displayed a <span class="hlt">sulfide</span>-dependent increase in luminescence, while Tb complex 2 displayed a decrease in luminescence upon exposure to NaHS. The utility of the complexes for monitoring <span class="hlt">sulfide</span> levels in industrial oil and water samples was investigated. Complex 3 provided a sensitive measure of <span class="hlt">sulfide</span> levels in petrochemical water samples (detection limit ∼ 250 nM), while complex 1 was capable of monitoring μM levels of <span class="hlt">sulfide</span> in partially refined crude oil. Copyright © 2015 Elsevier B.V. All rights reserved.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/26967672','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/26967672"><span><span class="hlt">Sulfidization</span> of Organic Freshwater Flocs from a Minerotrophic Peatland: Speciation Changes of Iron, Sulfur, and Arsenic.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>ThomasArrigo, Laurel K; Mikutta, Christian; Lohmayer, Regina; Planer-Friedrich, Britta; Kretzschmar, Ruben</p> <p>2016-04-05</p> <p>Iron-rich organic flocs are frequently observed in surface waters of wetlands and show a high affinity for trace <span class="hlt">metal</span>(loid)s. Under low-flow stream conditions, flocs may settle, become buried, and eventually be subjected to reducing conditions facilitating trace <span class="hlt">metal</span>(loid) release. In this study, we reacted freshwater flocs (704-1280 mg As/kg) from a minerotrophic peatland (Gola di Lago, Switzerland) with <span class="hlt">sulfide</span> (5.2 mM, S(-II)spike/Fe = 0.75-1.62 mol/mol) at neutral pH and studied the speciation changes of Fe, S, and As at 25 ± 1 °C over 1 week through a combination of synchrotron X-ray techniques and wet-chemical analyses. <span class="hlt">Sulfidization</span> of floc ferrihydrite and nanocrystalline lepidocrocite caused the rapid formation of mackinawite (52-81% of Fesolid at day 7) as well as solid-phase associated S(0) and polysulfides. Ferrihydrite was preferentially reduced over lepidocrocite, although neoformation of lepidocrocite from ferrihydrite could not be excluded. <span class="hlt">Sulfide</span>-reacted flocs contained primarily arsenate (47-72%) which preferentially adsorbed to Fe(III)-(oxyhydr)oxides, despite abundant mackinawite precipitation. At higher S(-II)spike/Fe molar ratios (≥1.0), the formation of an orpiment-like phase accounted for up to 35% of solid-phase As. Despite Fe and As <span class="hlt">sulfide</span> precipitation and the presence of residual Fe(III)-(oxyhydr)oxides, mobilization of As was recorded in all samples (Asaq = 0.45-7.0 μM at 7 days). Aqueous As speciation analyses documented the formation of thioarsenates contributing up to 33% of Asaq. Our findings show that freshwater flocs from the Gola di Lago peatland may become a source of As under sulfate-reducing conditions and emphasize the pivotal role Fe-rich organic freshwater flocs play in trace <span class="hlt">metal</span>(loid) cycling in S-rich wetlands characterized by oscillating redox conditions.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/28768063','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/28768063"><span>Photochemical Dual-Catalytic Synthesis of Alkynyl <span class="hlt">Sulfides</span>.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Santandrea, Jeffrey; Minozzi, Clémentine; Cruché, Corentin; Collins, Shawn K</p> <p>2017-09-25</p> <p>A photochemical dual-catalytic cross-coupling to form alkynyl <span class="hlt">sulfides</span> via C(sp)-S bond formation is described. The cross-coupling of thiols and bromoalkynes is promoted by a soluble organic carbazole-<span class="hlt">based</span> photocatalyst using continuous flow techniques. Synthesis of alkynyl <span class="hlt">sulfides</span> bearing a wide range of electronically and sterically diverse aromatic alkynes and thiols can be achieved in good to excellent yields (50-96 %). The simple continuous flow setup also allows for short reaction times (30 min) and high reproducibility on gram scale. In addition, we report the first application of photoredox/nickel dual catalysis towards macrocyclization, as well as the first example of the incorporation of an alkynyl <span class="hlt">sulfide</span> functional group into a macrocyclic scaffold. © 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/24226648','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/24226648"><span>Stabilities of thiomolybdate complexes of iron; implications for retention of essential trace elements (Fe, Cu, Mo) in <span class="hlt">sulfidic</span> waters.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Helz, George R; Erickson, Britt E; Vorlicek, Trent P</p> <p>2014-06-01</p> <p>In aquatic ecosystems, availabilities of Fe, Mo and Cu potentially limit rates of critical biological processes, including nitrogen fixation, nitrate assimilation and N2O decomposition. During long periods in Earth's history when large parts of the ocean were <span class="hlt">sulfidic</span>, what prevented these elements' quantitative loss from marine habitats as insoluble <span class="hlt">sulfide</span> phases? They must have been retained by formation of soluble complexes. Identities of the key ligands are poorly known but probably include thioanions. Here, the first determinations of stability constants for Fe(2+)-[MoS4](2-) complexes in aqueous solution are reported <span class="hlt">based</span> on measurements of pyrrhotite (hexagonal FeS) solubility under mildly alkaline conditions. Two linear complexes, [FeO(OH)MoS4](3-) and [(Fe2S2)(MoS4)2](4-), best explain the observed solubility variations. Complexes that would be consistent with cuboid cluster structures were less successful, implying that such clusters probably are minor or absent in aqueous solution under the conditions studied. The new data, together with prior data on stabilities of Cu(+)-[MoS4](2-) complexes, are used to explore computationally how competition of Fe(2+) and Cu(+) for [MoS4](2-), as well as competition of [MoS4](2-) and HS(-) for both <span class="hlt">metals</span> would be resolved in solutions representative of <span class="hlt">sulfidic</span> natural waters. Thiomolybdate complexes will be most important at <span class="hlt">sulfide</span> concentrations near the [MoO4](2-)-[MoS4](2-) equivalence point. At lower <span class="hlt">sulfide</span> concentrations, thiomolybdates are insufficiently stable to be competitive ligands in natural waters and at higher <span class="hlt">sulfide</span> concentrations HS(-) ligands out-compete thiomolybdates.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/28275840','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/28275840"><span>Evaluating the Effects of <span class="hlt">Metals</span> on Microorganisms in Flooded Paddy Soils Using the SEM/AVS-<span class="hlt">Based</span> Approach and Measurements of Exchangeable <span class="hlt">Metal</span> Concentrations.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Kunito, Takashi; Toya, Hitomi; Sumi, Hirotaka; Ishikawa, Yuichi; Toda, Hideshige; Nagaoka, Kazunari; Saeki, Kazutoshi; Aikawa, Yoshio; Matsumoto, Satoshi</p> <p>2017-04-01</p> <p>We examined possible adverse effects of heavy <span class="hlt">metals</span> on microbial activity, biomass, and community composition using the simultaneously extracted <span class="hlt">metals</span> (SEM)/acid-volatile <span class="hlt">sulfide</span> (AVS)-<span class="hlt">based</span> approach and measurements of exchangeable <span class="hlt">metal</span> concentrations in three paddy soils (wastewater-contaminated soil, mine-contaminated soil, and noncontaminated soil) incubated for 60 days under flooded conditions. Incubation under flooding increased pH and decreased Eh in all samples. AVS increased when Eh decreased to approximately -200 mV for the mine-contaminated and noncontaminated soils, while the wastewater-contaminated soil originally had a high concentration of AVS despite its air-dried condition. Addition of rice straw or alkaline material containing calcium carbonate and gypsum increased AVS levels under flooded conditions. We observed no apparent relationship between soil enzyme activity (β-D-glucosidase and acid phosphatase) and concentrations of SEM, [∑SEM - AVS], and exchangeable <span class="hlt">metals</span>. Bacterial and fungal community composition, assessed using polymerase chain reaction-denaturing gradient gel electrophoresis (DGGE) analysis targeting rRNA genes, was largely influenced by site of collection and incubation time, but <span class="hlt">metal</span> contamination did not influence community composition. We observed significant negative correlations between biomass C and [∑SEM - AVS] and between biomass C and ∑SEM, suggesting that [∑SEM - AVS] and ∑SEM might reflect the bioavailability of organic matter to microorganisms in these soils.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/22230152','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/22230152"><span>The sirolimus-eluting Cypher Select coronary stent for the treatment of bare-<span class="hlt">metal</span> and drug-eluting stent restenosis: insights from the e-SELECT (Multicenter Post-Market Surveillance) registry.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Abizaid, Alexandre; Costa, J Ribamar; Banning, Adrian; Bartorelli, Antonio L; Dzavik, Vladimir; Ellis, Stephen; Gao, Runlin; Holmes, David R; Jeong, Muyng Ho; Legrand, Victor; Neumann, Franz-Josef; Nyakern, Maria; Orlick, Amy; Spaulding, Christian; Worthley, Stephen; Urban, Philip M</p> <p>2012-01-01</p> <p>This study sought to compare the 1-year safety and efficacy of Cypher Select or Cypher Select Plus (Cordis Corporation, Bridgewater, New Jersey) sirolimus-eluting stents (SES) with the treatment of bare-<span class="hlt">metal</span> stents (<span class="hlt">BMS</span>) and drug-eluting stent (DES) in-stent restenosis (ISR) in nonselected, real-world patients. There is paucity of consistent data on DES for the treatment of ISR, especially, DES ISR. The e-SELECT (Multicenter Post-Market Surveillance) registry is a Web-<span class="hlt">based</span>, multicenter and international registry encompassing virtually all subsets of patients and lesions treated with at least 1 SES during the period from 2006 to 2008. We enrolled in this pre-specified subanalysis all patients with at least 1 clinically relevant <span class="hlt">BMS</span> or DES ISR treated with SES. Primary endpoint was major adverse cardiac events and stent thrombosis rate at 1 year. Of 15,147 patients enrolled, 1,590 (10.5%) presented at least 1 ISR (<span class="hlt">BMS</span> group, n = 1,235, DES group, n = 355). Patients with DES ISR had higher incidence of diabetes (39.4% vs. 26.9%, p < 0.001), renal insufficiency (5.8% vs. 2.3%, p = 0.003), and prior coronary artery bypass graft (20.5% vs. 11.8%, p < 0.001). At 1 year, death (1.4% for <span class="hlt">BMS</span> vs. 2.1% for DES, p = 0.3) and myocardial infarction (2.4% for <span class="hlt">BMS</span> and 3.3% for DES, p = 0.3) rates were similar, whereas ischemia-driven target lesion revascularization and definite/probable late stent thrombosis were higher in patients with DES ISR (6.9% vs. 3.1%, p = 0.003, and 1.8% vs. 0.5%, p = 0.04, respectively). Use of SES for either <span class="hlt">BMS</span> or DES ISR treatment is safe and associated with low target lesion revascularization recurrence and no apparent safety concern. Copyright © 2012 American College of Cardiology Foundation. Published by Elsevier Inc. All rights reserved.</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_19");'>19</a></li> <li><a href="#" onclick='return showDiv("page_20");'>20</a></li> <li class="active"><span>21</span></li> <li><a href="#" onclick='return showDiv("page_22");'>22</a></li> <li><a href="#" onclick='return showDiv("page_23");'>23</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_21 --> <div id="page_22" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_20");'>20</a></li> <li><a href="#" onclick='return showDiv("page_21");'>21</a></li> <li class="active"><span>22</span></li> <li><a href="#" onclick='return showDiv("page_23");'>23</a></li> <li><a href="#" onclick='return showDiv("page_24");'>24</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="421"> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/16807929','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/16807929"><span><span class="hlt">Sulfide</span> oxidation under chemolithoautotrophic denitrifying conditions.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Cardoso, Ricardo Beristain; Sierra-Alvarez, Reyes; Rowlette, Pieter; Flores, Elias Razo; Gómez, Jorge; Field, Jim A</p> <p>2006-12-20</p> <p>Chemolithoautotrophic denitrifying microorganisms oxidize reduced inorganic sulfur compounds coupled to the reduction of nitrate as an electron acceptor. These denitrifiers can be applied to the removal of nitrogen and/or sulfur contamination from wastewater, groundwater, and gaseous streams. This study investigated the physiology and kinetics of chemolithotrophic denitrification by an enrichment culture utilizing hydrogen <span class="hlt">sulfide</span>, elemental sulfur, or thiosulfate as electron donor. Complete oxidation of <span class="hlt">sulfide</span> to sulfate was observed when nitrate was supplemented at concentrations equal or exceeding the stoichiometric requirement. In contrast, <span class="hlt">sulfide</span> was only partially oxidized to elemental sulfur when nitrate concentrations were limiting. <span class="hlt">Sulfide</span> was found to inhibit chemolithotrophic sulfoxidation, decreasing rates by approximately 21-fold when the <span class="hlt">sulfide</span> concentration increased from 2.5 to 10.0 mM, respectively. Addition of low levels of acetate (0.5 mM) enhanced denitrification and sulfate formation, suggesting that acetate was utilized as a carbon source by chemolithotrophic denitrifiers. The results of this study indicate the potential of chemolithotrophic denitrification for the removal of hydrogen <span class="hlt">sulfide</span>. The <span class="hlt">sulfide</span>/nitrate ratio can be used to control the fate of <span class="hlt">sulfide</span> oxidation to either elemental sulfur or sulfate. Copyright 2006 Wiley Periodicals, Inc.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://pubs.er.usgs.gov/publication/70180388','USGSPUBS'); return false;" href="https://pubs.er.usgs.gov/publication/70180388"><span>Dissolved organic matter enhances microbial mercury methylation under <span class="hlt">sulfidic</span> conditions</span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Graham, Andrew M.; Aiken, George R.; Gilmour, Cynthia</p> <p>2012-01-01</p> <p>Dissolved organic matter (DOM) is generally thought to lower <span class="hlt">metal</span> bioavailability in aquatic systems due to the formation of metal–DOM complexes that reduce free <span class="hlt">metal</span> ion concentrations. However, this model may not be pertinent for <span class="hlt">metal</span> nanoparticles, which are now understood to be ubiquitous, sometimes dominant, <span class="hlt">metal</span> species in the environment. The influence of DOM on Hg bioavailability to microorganisms was examined under conditions (0.5–5.0 nM Hg and 2–10 μM <span class="hlt">sulfide</span>) that favor the formation of β-HgS(s) (metacinnabar) nanoparticles. We used the methylation of stable-isotope enriched 201HgCl2 by Desulfovibrio desulfuricans ND132 in short-term washed cell assays as a sensitive, environmentally significant proxy for Hg uptake. Suwannee River humic acid (SRHA) and Williams Lake hydrophobic acid (WLHPoA) substantially enhanced (2- to 38-fold) the bioavailability of Hg to ND132 over a wide range of Hg/DOM ratios (9.4 pmol/mg DOM to 9.4 nmol/mg DOM), including environmentally relevant ratios. Methylmercury (MeHg) production by ND132 increased linearly with either SRHA or WLHPoA concentration, but SRHA, a terrestrially derived DOM, was far more effective at enhancing Hg-methylation than WLHPoA, an aquatic DOM dominated by autochthonous sources. No DOM-dependent enhancement in Hg methylation was observed in Hg–DOM–<span class="hlt">sulfide</span> solutions amended with sufficient l-cysteine to prevent β-HgS(s) formation. We hypothesize that small HgS particles, stabilized against aggregation by DOM, are bioavailable to Hg-methylating bacteria. Our laboratory experiments provide a mechanism for the positive correlations between DOC and MeHg production observed in many aquatic sediments and wetland soils.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/24767313','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/24767313"><span>Intra-stent tissue evaluation within bare <span class="hlt">metal</span> and drug-eluting stents > 3 years since implantation in patients with mild to moderate neointimal proliferation using optical coherence tomography and virtual histology intravascular ultrasound.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Kitabata, Hironori; Loh, Joshua P; Pendyala, Lakshmana K; Omar, Alfazir; Ota, Hideaki; Minha, Sa'ar; Magalhaes, Marco A; Torguson, Rebecca; Chen, Fang; Satler, Lowell F; Pichard, Augusto D; Waksman, Ron</p> <p>2014-04-01</p> <p>We aimed to compare neointimal tissue characteristics between bare-<span class="hlt">metal</span> stents (<span class="hlt">BMS</span>) and drug-eluting stents (DES) at long-term follow-up using optical coherence tomography (OCT) and virtual histology intravascular ultrasound (VH-IVUS). Neoatherosclerosis in neointima has been reported in <span class="hlt">BMS</span> and in DES. Thirty patients with 36 stented lesions [<span class="hlt">BMS</span> (n=17) or DES (n=19)] >3years after implantation were prospectively enrolled. OCT and VH-IVUS were performed and analyzed independently. Stents with ≥70% diameter stenosis were excluded. The median duration from implantation was 126.0months in the <span class="hlt">BMS</span> group and 60.0months in the DES group (p <0.001). Lipid-laden intima (58.8% vs. 42.1%, p=0.317), thrombus (17.6% vs. 5.3%, p=0.326), and calcification (35.3% vs. 26.3%, p=0.559) did not show significant differences between <span class="hlt">BMS</span> and DES. When divided into 3 time periods, the cumulative incidence of lipid-laden neointima from >3years to <9years was similar between <span class="hlt">BMS</span> and DES (42.9% vs. 42.1%, p=1.000). Furthermore, it continued to gradually increase over time in both groups. OCT-derived thin-cap fibroatheroma (TCFA) was observed in 17.6% of <span class="hlt">BMS</span>- and 5.3% of DES-treated lesions (p=0.326). No stents had evidence of intimal disruption. The percentage volume of necrotic core (16.1% [9.7, 20.3] vs. 9.7% [7.0, 16.5], p=0.062) and dense calcium (9.5% [3.8, 13.6] vs. 2.7% [0.4, 4.9], p=0.080) in neointima tended to be greater in <span class="hlt">BMS</span>-treated lesions. Intra-stent VH-TCFA (<span class="hlt">BMS</span> vs. DES 45.5% vs. 18.2%, p=0.361) did not differ significantly. At long-term follow-up beyond 3 years after implantation, the intra-stent neointimal tissue characteristics appeared similar for both <span class="hlt">BMS</span> and DES. Copyright © 2014 Elsevier Inc. All rights reserved.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/24355117','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/24355117"><span>Risk of stent thrombosis among bare-<span class="hlt">metal</span> stents, first-generation drug-eluting stents, and second-generation drug-eluting stents: results from a registry of 18,334 patients.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Tada, Tomohisa; Byrne, Robert A; Simunovic, Iva; King, Lamin A; Cassese, Salvatore; Joner, Michael; Fusaro, Massimiliano; Schneider, Simon; Schulz, Stefanie; Ibrahim, Tareq; Ott, Ilka; Massberg, Steffen; Laugwitz, Karl-Ludwig; Kastrati, Adnan</p> <p>2013-12-01</p> <p>This study sought to compare the risk of stent thrombosis among patients treated with bare-<span class="hlt">metal</span> stents (<span class="hlt">BMS</span>), first-generation drug-eluting stents (G1-DES), and second-generation drug-eluting stents (G2-DES) for a period of 3 years. In patients undergoing coronary stenting, there is a scarcity of long-term follow-up data on cohorts large enough to compare rates of stent thrombosis across the stent generations. A total of 18,334 patients undergoing successful coronary stent implantation from 1998 to 2011 at 2 centers in Munich, Germany, were included in this study. Patients were stratified into 3 groups according to treatment with <span class="hlt">BMS</span>, G1-DES, and G2-DES. The cumulative incidence of definite stent thrombosis at 3 years was 1.5% with <span class="hlt">BMS</span>, 2.2% with G1-DES, and 1.0% with G2-DES. On multivariate analysis, G1-DES compared with <span class="hlt">BMS</span> showed a significantly higher risk of stent thrombosis (odds ratio [OR]: 2.05; 95% confidence interval [CI]: 1.47 to 2.86; p < 0.001). G2-DES were associated with a similar risk of stent thrombosis compared with <span class="hlt">BMS</span> (OR: 0.82; 95% CI: 0.56 to 1.19; p = 0.30). Beyond 1 year, the risk of stent thrombosis was significantly increased with G1-DES compared with <span class="hlt">BMS</span> (OR: 4.72; 95% CI: 2.01 to 11.1; p < 0.001), but not with G2-DES compared with <span class="hlt">BMS</span> (OR: 1.01; 95% CI: 0.32 to 3.25; p = 0.98). In a large cohort of unselected patients undergoing coronary stenting, compared with <span class="hlt">BMS</span>, there was a significant excess risk of stent thrombosis at 3 years with G1-DES, driven by an increased risk of stent thrombosis events beyond 1 year. G2-DES were associated with a similar risk of stent thrombosis compared with <span class="hlt">BMS</span>. Copyright © 2013 American College of Cardiology Foundation. Published by Elsevier Inc. All rights reserved.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/servlets/purl/270489','SCIGOV-STC'); return false;" href="https://www.osti.gov/servlets/purl/270489"><span>Microbial control of hydrogen <span class="hlt">sulfide</span> production</span></a></p> <p><a target="_blank" href="http://www.osti.gov/search">DOE Office of Scientific and Technical Information (OSTI.GOV)</a></p> <p>Montgomery, A.D.; Bhupathiraju, V.K.; Wofford, N.</p> <p>1995-12-31</p> <p>A <span class="hlt">sulfide</span>-resistant strain of Thiobacillus denitrificans, strain F, prevented the accumulation of <span class="hlt">sulfide</span> by Desulfovibrio desulfuricans when both organisms were grown in liquid medium. The wild-type strain of T. denitrificans did not prevent the accumulation of <span class="hlt">sulfide</span> produced by D. desulfuricans. Strain F also prevented the accumulation of <span class="hlt">sulfide</span> by a mixed population of sulfate-reducing bacteria enriched from an oil field brine. Fermentation balances showed that strain F stoichiometrically oxidized the <span class="hlt">sulfide</span> produced by D. desulfuricans and the oil field brine enrichment to sulfate. The ability of a strain F to control <span class="hlt">sulfide</span> production in an experimental system of coresmore » and formation water from the Redfield, Iowa, natural gas storage facility was also investigated. A stable, <span class="hlt">sulfide</span>-producing biofilm was established in two separate core systems, one of which was inoculated with strain F while the other core system (control) was treated in an identical manner, but was not inoculated with strain F. When formation water with 10 mM acetate and 5 mM nitrate was injected into both core systems, the effluent <span class="hlt">sulfide</span> concentrations in the control core system ranged from 200 to 460 {mu}M. In the test core system inoculated with strain F, the effluent <span class="hlt">sulfide</span> concentrations were lower, ranging from 70 to 110 {mu}M. In order to determine whether strain F could control <span class="hlt">sulfide</span> production under optimal conditions for sulfate-reducing bacteria, the electron donor was changed to lactate and inorganic nutrients (nitrogen and phosphate sources) were added to the formation water. When nutrient-supplemented formation water with 3.1 mM lactate and 10 mM nitrate was used, the effluent <span class="hlt">sulfide</span> concentrations of the control core system initially increased to about 3,800 {mu}M, and then decreased to about 1,100 {mu}M after 5 weeks. However, in the test core system inoculated with strain F, the effluent <span class="hlt">sulfide</span> concentrations were much lower, 160 to 330 {mu}M.« less</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2018JMS...180..220W','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2018JMS...180..220W"><span>Mineralogy, geochemistry, and Sr-Pb isotopic geochemistry of hydrothermal massive <span class="hlt">sulfides</span> from the 15.2°S hydrothermal field, Mid-Atlantic Ridge</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Wang, Hao; Li, Xiaohu; Chu, Fengyou; Li, Zhenggang; Wang, Jianqiang; Yu, Xing; Bi, Dongwei</p> <p>2018-04-01</p> <p>The 15.2°S hydrothermal field is located at 15.2°S, 13.4°W within the Mid-Atlantic Ridge (MAR) and was initially discovered during Cruise DY125-22 by the Chinese expedition during R/V Dayangyihao in 2011. Here, we provide detailed mineralogical, bulk geochemical, and Sr-Pb isotopic data for massive <span class="hlt">sulfides</span> and basalts from the 15.2°S hydrothermal field to improve our understanding of the mineral compositions, geochemical characteristics, type of hydrothermal field, and the source of <span class="hlt">metals</span> present at this vent site. The samples include 14 massive <span class="hlt">sulfides</span> and a single basalt. The massive <span class="hlt">sulfides</span> are dominated by pyrite with minor amounts of sphalerite and chalcopyrite, although a few samples also contain minor amounts of gordaite, a sulfate mineral. The <span class="hlt">sulfides</span> have bulk compositions that contain low concentrations of Cu + Zn (mean 7.84 wt%), Co (mean 183 ppm), Ni (mean 3 ppm), and Ba (mean 16 ppm), similar to the Normal Mid-Ocean Ridge Basalt (N-MORB) type deposits along the MAR but different to the compositions of the Enriched-MORB (E-MORB) and ultramafic type deposits along this spreading ridge. <span class="hlt">Sulfides</span> from the study area have Pb isotopic compositions (206Pb/204Pb = 18.4502-18.4538, 207Pb/204Pb = 15.4903-15.4936, 208Pb/204Pb = 37.8936-37.9176) that are similar to those of the basalt sample (206Pb/204Pb = 18.3381, 207Pb/204Pb = 15.5041, 208Pb/204Pb = 37.9411), indicating that the <span class="hlt">metals</span> within the <span class="hlt">sulfides</span> were derived from leaching of the surrounding basaltic rocks. The <span class="hlt">sulfides</span> also have 87Sr/86Sr ratios (0.708200-0.709049) that are much higher than typical MAR hydrothermal fluids (0.7028-0.7046), suggesting that the hydrothermal fluids mixed with a significant amount of seawater during massive <span class="hlt">sulfide</span> precipitation.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2018SPIE10488E..09B','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2018SPIE10488E..09B"><span>Investigation of hydrogen <span class="hlt">sulfide</span> gas using Pd/Pt material <span class="hlt">based</span> fiber Bragg grating sensor</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Bedi, Amna; Rao, Dusari Nageswara; Kumar, Santosh</p> <p>2018-02-01</p> <p>In this work, Pd/Pt material <span class="hlt">based</span> fiber Bragg grating (FBG) sensors has been proposed for detection of hydrogen <span class="hlt">sulfide</span> gas. Here, characteristics of FBG parameters were numerically calculated and simulated. The variation in reflectivity <span class="hlt">based</span> on refractive index has been shown. The reflectivity of FBG can be varied when refractive index is changed. The proposed sensor works on very low concentration i.e., 0% to 1%, which has the capability to detect in the early stage.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/20066911','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/20066911"><span>Carbonyl <span class="hlt">sulfide</span> removal with compost and wood chip biofilters, and in the presence of hydrogen <span class="hlt">sulfide</span>.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Sattler, Melanie L; Garrepalli, Divya R; Nawal, Chandraprakash S</p> <p>2009-12-01</p> <p>Carbonyl <span class="hlt">sulfide</span> (COS) is an odor-causing compound and hazardous air pollutant emitted frequently from wastewater treatment facilities and chemical and primary <span class="hlt">metals</span> industries. This study examined the effectiveness of biofiltration in removing COS. Specific objectives were to compare COS removal efficiency for various biofilter media; to determine whether hydrogen <span class="hlt">sulfide</span> (H2S), which is frequently produced along with COS under anaerobic conditions, adversely impacts COS removal; and to determine the maximum elimination capacity of COS for use in biofilter design. Three laboratory-scale polyvinyl chloride biofilter columns were filled with up to 28 in. of biofilter media (aged compost, fresh compost, wood chips, or a compost/wood chip mixture). Inlet COS ranged from 5 to 46 parts per million (ppm) (0.10-9.0 g/m3 hr). Compost and the compost/wood chip mixture produced higher COS removal efficiencies than wood chips alone. The compost and compost/wood chip mixture had a shorter stabilization times compared with wood chips alone. Fresh versus aged compost did not impact COS removal efficiency. The presence of H2S did not adversely impact COS removal for the concentration ratios tested. The maximum elimination capacity is at least 9 g/m3 hr for COS with compost media.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/19780144','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/19780144"><span>Utilization of in vitro Caco-2 permeability and liver microsomal half-life screens in discovering <span class="hlt">BMS</span>-488043, a novel HIV-1 attachment inhibitor with improved pharmacokinetic properties.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Yang, Zheng; Zadjura, Lisa M; Marino, Anthony M; D'Arienzo, Celia J; Malinowski, Jacek; Gesenberg, Christoph; Lin, Pin-Fang; Colonno, Richard J; Wang, Tao; Kadow, John F; Meanwell, Nicholas A; Hansel, Steven B</p> <p>2010-04-01</p> <p>Optimizing pharmacokinetic properties to improve oral exposure is a common theme in modern drug discovery. In the present work, in vitro Caco-2 permeability and microsomal half-life screens were utilized in an effort to guide the structure-activity relationship in order to improve the pharmacokinetic properties of novel HIV-1 attachment inhibitors. The relevance of the in vitro screens to in vivo pharmacokinetic properties was first demonstrated with a number of program compounds at the early stage of lead optimization. The Caco-2 permeability, tested at 200 microM, was quantitatively predictive of in vivo oral absorption, with complete absorption occurring at a Caco-2 permeability of 100 nm/s or higher. The liver microsomal half-life screen, conducted at 1 microM substrate concentration, can readily differentiate low-, intermediate-, and high-clearance compounds in rats, with a nearly 1:1 correlation in 12 out of 13 program compounds tested. Among the >100 compounds evaluated, <span class="hlt">BMS</span>-488043 emerged as a lead, exhibiting a Caco-2 permeability of 178 nm/s and a microsomal half-life predictive of a low clearance (4 mL/min/kg) in humans. These in vitro characteristics translated well to the in vivo setting. The oral bioavailability of <span class="hlt">BMS</span>-488043 in rats, dogs, and monkeys was 90%, 57%, and 60%, respectively. The clearance was low in all three species tested, with a terminal half-life ranging from 2.4 to 4.7 h. Furthermore, the oral exposure of <span class="hlt">BMS</span>-488043 was significantly improved (6- to 12-fold in rats and monkeys) compared to the prototype compound <span class="hlt">BMS</span>-378806 that had a suboptimal Caco-2 permeability (51 nm/s) and microsomal half-life. More importantly, the improvements in preclinical pharmacokinetics translated well to humans, leading to a >15-fold increase in the human oral exposure of <span class="hlt">BMS</span>-488043 than <span class="hlt">BMS</span>-378806 and enabling a clinical proof-of-concept for this novel class of anti-HIV agents. The current studies demonstrated the valuable role of in vitro ADME screens</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/29149553','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/29149553"><span>Cobalt <span class="hlt">Sulfide</span> Quantum Dot Embedded N/S-Doped Carbon Nanosheets with Superior Reversibility and Rate Capability for Sodium-Ion Batteries.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Guo, Qiubo; Ma, Yifan; Chen, Tingting; Xia, Qiuying; Yang, Mei; Xia, Hui; Yu, Yan</p> <p>2017-12-26</p> <p><span class="hlt">Metal</span> <span class="hlt">sulfides</span> are promising anode materials for sodium-ion batteries due to their large specific capacities. The practical applications of <span class="hlt">metal</span> <span class="hlt">sulfides</span> in sodium-ion batteries, however, are still limited due to their large volume expansion, poor cycling stability, and sluggish electrode kinetics. In this work, a two-dimensional heterostructure of CoS x (CoS and Co 9 S 8 ) quantum dots embedded N/S-doped carbon nanosheets (CoS x @NSC) is prepared by a sol-gel method. The CoS x quantum dots are in situ formed within ultrafine carbon nanosheets without further <span class="hlt">sulfidation</span>, thus resulting in ultrafine CoS x particle size and embedded heterostructure. Meanwhile, enriched N and S codoping in the carbon nanosheets greatly enhances the electrical conductivity for the conductive matrix and creates more active sites for sodium storage. As a result, the hybrid CoS x @NSC electrode shows excellent rate capability (600 mAh g -1 at 0.2 A g -1 and 500 mAh g -1 at 10 A g -1 ) and outstanding cycling stability (87% capacity retention after 200 cycles at 1 A g -1 ), making it promising as an anode material for high-performance sodium-ion batteries. A CoS x @NSC//Na 0.44 MnO 2 full cell is demonstrated, and it can deliver a specific capacity of 414 mAh g -1 (<span class="hlt">based</span> on the mass of CoS x @NSC) at a current density of 0.2 A g -1 .</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2017JTePh..62.1277S','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2017JTePh..62.1277S"><span>Nanocomposite polymer structures for optical sensors of hydrogen <span class="hlt">sulfide</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Sergeev, A. A.; Mironenko, A. Yu.; Nazirov, A. E.; Leonov, A. A.; Voznesenskii, S. S.</p> <p>2017-08-01</p> <p>Composite coatings <span class="hlt">based</span> on gold and silver nanoparticles reduced in situ in the film of chitosan polysaccharide are studied. In the presence of hydrogen <span class="hlt">sulfide</span>, the maximum of plasmon resonance of the nanoparticles that is proportional to the analyte concentration decreases. The detection limits for hydrogen <span class="hlt">sulfide</span> are 0.1 and 5 ppm for the chitosan/silver and chitosan/gold nanocomposites, respectively.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/servlets/purl/419384','SCIGOV-STC'); return false;" href="https://www.osti.gov/servlets/purl/419384"><span>Reactivity of <span class="hlt">Metal</span> Oxide Sorbents for Removal of H{sub 2}S</span></a></p> <p><a target="_blank" href="http://www.osti.gov/search">DOE Office of Scientific and Technical Information (OSTI.GOV)</a></p> <p>Kwon, K.C.; Crowe, E.R.</p> <p>1996-12-31</p> <p>Removal of hydrogen <span class="hlt">sulfide</span> contained in hot coal gases produced from integrated gasification combined cycle power generation systems is required to protect downstream combustion turbines from being corroded with sulfur compounds. Removal of sulfur compounds from hot coal gas products is investigated by using various <span class="hlt">metal</span> oxide sorbents and membrane separation methods. The main requirements of these <span class="hlt">metal</span> oxide sorbents are durability and high sulfur loading capacity during absorption-regeneration cycles. In this research, durable <span class="hlt">metal</span> oxide sorbents were formulated. Reactivity of the formulated <span class="hlt">metal</span> oxide sorbents with simulated coal gas mixtures was examined to search for an ideal sorbent formulationmore » with a high-sulfur loading capacity suitable for removal of hydrogen <span class="hlt">sulfide</span> from coal gases. The main objectives of this research are to formulate durable <span class="hlt">metal</span> oxide sorbents with high-sulfur loading capacity by a physical mixing method, to investigate reaction kinetics on the removal of sulfur compounds from coal gases at high temperature and pressure, to study reaction kinetics on the regeneration of <span class="hlt">sulfided</span> sorbents, to identify effects of hydrogen partial pressures and moisture on equilibrium/dynamic absorption of hydrogen <span class="hlt">sulfide</span> into formulated <span class="hlt">metal</span> oxide sorbents as well as initial reaction rates of H{sub 2}S with formulated <span class="hlt">metal</span> oxide sorbents, and to evaluate intraparticular diffusivity of H{sub 2}S into formulated sorbents at various reaction conditions. The <span class="hlt">metal</span> oxide sorbents such as TU-1, TU-19, TU-24, TU-25 and TU-28 were formulated with zinc oxide powder as an active sorbent ingredient, bentonite as a binding material and titanium oxide as a supporting <span class="hlt">metal</span> oxide.« less</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/servlets/purl/868890','DOE-PATENT-XML'); return false;" href="https://www.osti.gov/servlets/purl/868890"><span>Ternary <span class="hlt">metal</span>-rich <span class="hlt">sulfide</span> with a layered structure</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Franzen, Hugo F.; Yao, Xiaoqiang</p> <p>1993-08-17</p> <p>A ternary Nb-Ta-S compound is provided having the atomic formula, Nb.sub.1.72 Ta.sub.3.28 S.sub.2, and exhibiting a layered structure in the sequence S-M3-M2-M1-M2-M3-S wherein S represents sulfur layers and M1, M2, and M3 represent Nb/Ta mixed <span class="hlt">metal</span> layers. This sequence generates seven sheets stacked along the [001] direction of an approximate body centered cubic crystal structure with relatively weak sulfur-to-sulfur van der Waals type interactions between adjacent sulfur sheets and <span class="hlt">metal-to-metal</span> bonding within and between adjacent mixed <span class="hlt">metal</span> sheets.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2018JMoSt1151..230C','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2018JMoSt1151..230C"><span>A highly sensitive and selective fluorescent sensor for detection of <span class="hlt">sulfide</span> anion <span class="hlt">based</span> on the steric hindrance effect</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Chen, Guanfan; Tang, Mengzhuo; Fu, Xiufang; Cheng, Fenmin; Zou, Xianghua; Wang, Jingpei; Zeng, Rongjin</p> <p>2018-01-01</p> <p><span class="hlt">Sulfide</span> anions are not only generated as a byproduct from industrial processes but also as a crucial kind of element in biological systems. Therefore, fluorescent probes for detecting <span class="hlt">sulfide</span> anion with sensitive and selective characters are highly popular. In this study, we report a highly sensitive and selective fluorescent sensor M1 for detection of <span class="hlt">sulfide</span> anion <span class="hlt">based</span> on the steric hindrance effect, where the recognition unit, dinitrobenzenesulfonate ester group is linked to aromatic ortho-position in the porphyrin, and correspondingly the fluorescence of fluorescein is efficiently quenched. Compared with the sensors with recognition unit linked to the other aromatic positions, the fluorescent sensor M1 has a lower fluorescence background. Furthermore, the corresponding fluorescence responses (F/F0) of M1 for mercapto amino-acid GSH, Hcy and Cys, were all far lower than the relative fluorescence ratio F/F0 values for S2-. It means that M1 is sensitive and selective to detection of S2-, and has an anti-disturbance ability to the biologically-relevant thiols, GSH, Hcy and Cys, and has the prospect of application in the exact detection of <span class="hlt">sulfide</span> anions in living organisms. This approach offers some useful insights for realizing sensitive and selective fluorescent turn-on sensing in the detection assays for other analytes.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4413942','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4413942"><span>Hydrogen <span class="hlt">sulfide</span> measurement using <span class="hlt">sulfide</span> dibimane: critical evaluation with electrospray ion trap mass spectrometry</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Shen, Xinggui; Chakraborty, Sourav; Dugas, Tammy R; Kevil, Christopher G</p> <p>2015-01-01</p> <p>Accurate measurement of hydrogen <span class="hlt">sulfide</span> bioavailability remains a technical challenge due to numerous issues involving sample processing, detection methods used, and actual biochemical products measured. Our group and others have reported that reverse phase HPLC detection of <span class="hlt">sulfide</span> dibimane (SDB) product from the reaction of H2S/HS− with monobromobimane allows for analytical detection of hydrogen <span class="hlt">sulfide</span> bioavailability in free and other biochemical forms. However, it remains unclear whether possible interfering contaminants may contribute to HPLC SDB peak readings that may result in inaccurate measurements of bioavailable <span class="hlt">sulfide</span>. In this study, we critically compared hydrogen <span class="hlt">sulfide</span> dependent SDB detection using reverse phase HPLC (RP-HPLC) versus quantitative SRM electrospray ionization mass spectrometry (ESI/MS) to obtain greater clarity into the validity of the reverse phase HPLC method for analytical measurement of hydrogen <span class="hlt">sulfide</span>. Using an LCQ-deca ion-trap mass spectrometer, SDB was identified by ESI/MS positive ion mode, and quantified by selected reaction monitoring (SRM) using hydrocortisone as an internal standard. Collision induced dissociation (CID) parameters were optimized at MS2 level for SDB and hydrocortisone. ESI/MS detection of SDB standard was found to be a log order more sensitive than RP-HPLC with a lower limit of 0.25 nM. Direct comparison of tissue and plasma SDB levels using RP-HPLC and ESI/MS methods revealed comparable <span class="hlt">sulfide</span> levels in plasma, aorta, heart, lung and brain. Together, these data confirm the use of SDB as valid indicator of H2S bioavailability and highlights differences between analytical detection methods. PMID:24932544</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=61024&keyword=mines+AND+technology&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50','EPA-EIMS'); return false;" href="https://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=61024&keyword=mines+AND+technology&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50"><span>BIORECOVERY OF <span class="hlt">METALS</span> FROM ACID MINE DRAINAGE</span></a></p> <p><a target="_blank" href="http://oaspub.epa.gov/eims/query.page">EPA Science Inventory</a></p> <p></p> <p></p> <p>Acid mine water is an acidic, <span class="hlt">metal</span>-bearing wastewater generated by the oxidation of <span class="hlt">metallic</span> <span class="hlt">sulfides</span> by certain bacteria in both active and abandoned mining operations. The wastewaters contain substantial quantities of dissolved solids with the particular pollutants dependant u...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2013AGUFM.B31D0434R','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2013AGUFM.B31D0434R"><span>Source Of Hydrogen <span class="hlt">Sulfide</span> To <span class="hlt">Sulfidic</span> Spring And Watershed Ecosystems In Northern Sierra De Chiapas, Mexico <span class="hlt">Based</span> On Sulfur And Carbon Isotopes</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Rosales Lagarde, L.; Boston, P. J.; Campbell, A.</p> <p>2013-12-01</p> <p>At least four watersheds in northern Sierra de Chiapas, Mexico are fed by conspicuous karst <span class="hlt">sulfide</span>-rich springs. The toxic hydrogen <span class="hlt">sulfide</span> (H2S) in these springs nurtures rich ecosystems including especially adapted microorganisms, invertebrates and fish. Sulfur and carbon isotopic analysis of various chemical species in the spring water are integrated within their hydrogeologic context to evaluate the hydrogen <span class="hlt">sulfide</span> source. Constraining the H2S origin can also increase the understanding of this compound effect in the quality of the nearby hydrocarbon reservoirs, and the extent to which its oxidation to sulfuric acid increases carbonate dissolution and steel corrosion in surface structures. The SO42-/H2S ratio in the spring water varies from 70,000 to 2 meq/L thus sulfate is the dominant species in the groundwater system. This sulfate is mainly produced from anhydrite dissolution <span class="hlt">based</span> on its isotopic signature. The Δ SO42--H2S range of 16 spring water samples (30-50 ‰) is similar to the values determined by Goldhaber & Kaplan (1975) and Canfield (2001) for low rates of bacterial sulfate reduction suggesting that this is the most important mechanism producing H2S. Although the carbon isotopes do not constrain the nature of the organic matter participating in this reaction, this material likely comes from depth, perhaps as hydrocarbons, due to the apparent stability of the system. The organic matter availability and reactivity probably control the progress of sulfate reduction. The subsurface environments identified in the area also have different sulfur isotopic values. The heavier residual sulfate isotopic value in the Northern brackish springs (δ34S SO42- ≥ 18 ‰) compared to the Southern springs (δ34S SO42- ~18 ‰) suggests sulfate reduction is particularly enhanced in the former, probably by contribution of organic matter associated with oil produced water. In comparison, the composition of the Southern aquifer is mainly influenced by halite</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=87757&keyword=water+AND+purification&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50','EPA-EIMS'); return false;" href="https://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=87757&keyword=water+AND+purification&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50"><span>ADVANCES IN BIOTREATMENT OF ACID MINE DRAINAGE AND BIORECOVERY OF <span class="hlt">METALS</span>: 1. <span class="hlt">METAL</span> PRECIPITATION FOR RECOVERY AND RECYCLE</span></a></p> <p><a target="_blank" href="http://oaspub.epa.gov/eims/query.page">EPA Science Inventory</a></p> <p></p> <p></p> <p>Acid-mine drainage (AMD) is a severe pollution problem attributed to past mining activities. AMD is an acidic, <span class="hlt">metal</span>-bearing wastewater generated by the oxidation of <span class="hlt">metal</span> <span class="hlt">sulfides</span> to sulfates by Thiobacillus bacteria in both active and abandoned mining operations. The wastewater...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2015EL....10918005O','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2015EL....10918005O"><span>Protein-<span class="hlt">based</span> nanobiosensor for direct detection of hydrogen <span class="hlt">sulfide</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Omidi, Meisam; Amoabediny, Ghasem; Yazdian, Fatemeh; Habibi-Rezaei, M.</p> <p>2015-01-01</p> <p>The chemically modified cytochrome c from equine heart, EC (232-700-9), was immobilized onto gold nanoparticles in order to develop a specific biosensing system for monitoring hydrogen <span class="hlt">sulfide</span> down to the micromolar level, by means of a localized surface plasmon resonance spectroscopy. The sensing mechanism is <span class="hlt">based</span> on the cytochrome-c conformational changes in the presence of H2S which alter the dielectric properties of the gold nanoparticles and the surface plasmon resonance peak undergoes a redshift. According to the experiments, it is revealed that H2S can be detected at a concentration of 4.0 μ \\text{M} (1.3 \\text{ppb}) by the fabricated biosensor. This simple, quantitative and sensitive sensing platform provides a rapid and convenient detection for H2S at concentrations far below the hazardous limit.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/20102180','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/20102180"><span><span class="hlt">Sulfide</span> binding properties of truncated hemoglobins.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Nicoletti, Francesco P; Comandini, Alessandra; Bonamore, Alessandra; Boechi, Leonardo; Boubeta, Fernando Martin; Feis, Alessandro; Smulevich, Giulietta; Boffi, Alberto</p> <p>2010-03-16</p> <p>The truncated hemoglobins from Bacillus subtilis (Bs-trHb) and Thermobifida fusca (Tf-trHb) have been shown to form high-affinity complexes with hydrogen <span class="hlt">sulfide</span> in their ferric state. The recombinant proteins, as extracted from Escherichia coli cells after overexpression, are indeed partially saturated with <span class="hlt">sulfide</span>, and even highly purified samples still contain a small but significant amount of iron-bound <span class="hlt">sulfide</span>. Thus, a complete thermodynamic and kinetic study has been undertaken by means of equilibrium and kinetic displacement experiments to assess the relevant <span class="hlt">sulfide</span> binding parameters. The body of experimental data indicates that both proteins possess a high affinity for hydrogen <span class="hlt">sulfide</span> (K = 5.0 x 10(6) and 2.8 x 10(6) M(-1) for Bs-trHb and Tf-trHb, respectively, at pH 7.0), though lower with respect to that reported previously for the <span class="hlt">sulfide</span> avid Lucina pectinata I hemoglobins (2.9 x 10(8) M(-1)). From the kinetic point of view, the overall high affinity resides in the slow rate of <span class="hlt">sulfide</span> release, attributed to hydrogen bonding stabilization of the bound ligand by distal residue WG8. A set of point mutants in which these residues have been replaced with Phe indicates that the WG8 residue represents the major kinetic barrier to the escape of the bound <span class="hlt">sulfide</span> species. Accordingly, classical molecular dynamics simulations of SH(-)-bound ferric Tf-trHb show that WG8 plays a key role in the stabilization of coordinated SH(-) whereas the YCD1 and YB10 contributions are negligible. Interestingly, the triple Tf-trHb mutant bearing only Phe residues in the relevant B10, G8, and CD1 positions is endowed with a higher overall affinity for <span class="hlt">sulfide</span> characterized by a very fast second-order rate constant and 2 order of magnitude faster kinetics of <span class="hlt">sulfide</span> release with respect to the wild-type protein. Resonance Raman spectroscopy data indicate that the <span class="hlt">sulfide</span> adducts are typical of a ferric iron low-spin derivative. In analogy with other low-spin ferric <span class="hlt">sulfide</span></p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_20");'>20</a></li> <li><a href="#" onclick='return showDiv("page_21");'>21</a></li> <li class="active"><span>22</span></li> <li><a href="#" onclick='return showDiv("page_23");'>23</a></li> <li><a href="#" onclick='return showDiv("page_24");'>24</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_22 --> <div id="page_23" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_21");'>21</a></li> <li><a href="#" onclick='return showDiv("page_22");'>22</a></li> <li class="active"><span>23</span></li> <li><a href="#" onclick='return showDiv("page_24");'>24</a></li> <li><a href="#" onclick='return showDiv("page_25");'>25</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="441"> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2000E%26PSL.179..477L','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2000E%26PSL.179..477L"><span><span class="hlt">Metal</span>-silicate interaction in quenched shock-induced melt of the Tenham L6-chondrite</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Leroux, Hugues; Doukhan, Jean-Claude; Guyot, François</p> <p>2000-07-01</p> <p>The <span class="hlt">metal</span>-silicate microstructures in the shock-induced melt pockets of the Tenham (L6) chondrite have been investigated by analytical transmission electron microscopy. The melt areas, formed under high-pressure, high-temperature dynamic shock conditions, consist of spherical Fe-Ni <span class="hlt">metal</span>/iron <span class="hlt">sulfide</span> globules embedded in a silicate glass matrix, showing that the melt was quenched at high cooling rate. The Fe-Ni fraction in the globules is two-phase, composed of a bcc phase (˜5 wt% Ni) and an fcc phase (˜49 wt% Ni), indicating that fractional crystallisation of the <span class="hlt">metal</span> occurred during the fast cooling. The <span class="hlt">metal</span> fraction also contains appreciable amounts of non-siderophile elements (mostly Si, Mg and O) suggesting that these elements were trapped in the <span class="hlt">metal</span>, either as alloying components or as tiny silicate or oxide inclusions. In the iron <span class="hlt">sulfide</span> fraction, the Na content is high (>3 wt%), suggesting chalcophile behaviour for Na during the shock event. The composition of the silicate glass reflects non-equilibrium melting of several silicate phases (olivine, pyroxene and plagioclase). Moreover, the FeO content is high compared to the FeO contents of the unmelted silicates. Some Fe redistribution took place between <span class="hlt">metal</span> and silicate liquids during the shock event. The silicate glass also contains tiny iron <span class="hlt">sulfide</span> precipitates which most probably originated by exsolution during quench, suggesting that the molten silicate retained significant amounts of S, dissolved at high temperature and high pressure. <span class="hlt">Based</span> on these observations, we suggest that non-equilibrium phenomena may be important in determining the compositions of <span class="hlt">metal</span> and silicate reservoirs during their differentiation.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/29289290','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/29289290"><span>Toxicities and risk assessment of heavy <span class="hlt">metals</span> in sediments of Taihu Lake, China, <span class="hlt">based</span> on sediment quality guidelines.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Zhang, Yanfeng; Han, Yuwei; Yang, Jinxi; Zhu, Lingyan; Zhong, Wenjue</p> <p>2017-12-01</p> <p>The occurrence, toxicities, and ecological risks of five heavy <span class="hlt">metals</span> (Pb, Cu, Cd, Zn and Ni) in the sediment of Taihu Lake were investigated in this study. To evaluate the toxicities caused by the heavy <span class="hlt">metals</span>, the toxicities induced by organic contaminants and ammonia in the sediments were screened out with activated carbon and zeolite. The toxicities of heavy <span class="hlt">metals</span> in sediments were tested with benthic invertebrates (tubificid and chironomid). The correlations between toxicity of sediment and the sediment quality guidelines (SQGs) derived previously were evaluated. There were significant correlations (p<0.0001) between the observed toxicities and the total risk quotients of the heavy <span class="hlt">metals</span> <span class="hlt">based</span> on SQGs, indicating that threshold effect level (TEL) and probable effect level (PEL) were reliable to predict the toxicities of heavy <span class="hlt">metals</span> in the sediments of Taihu Lake. By contrast, the method <span class="hlt">based</span> on acid volatile <span class="hlt">sulfides</span> (AVS) and simultaneously extracted <span class="hlt">metals</span> (SEM), such as ∑SEM/AVS and ∑SEM-AVS, did not show correlations with the toxicities. Moreover, the predictive ability of SQGs was confirmed by a total predicting accuracy of 77%. Ecological risk assessment <span class="hlt">based</span> on TELs and PELs showed that the contaminations of Pb, Cu, Cd and Zn in the sediments of Taihu Lake were at relatively low or medium levels. The risks caused by heavy <span class="hlt">metals</span> in the sediments of northern bay of the lake, which received more wastewater discharge from upper stream, were higher than other area of the lake. Copyright © 2017. Published by Elsevier B.V.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/servlets/purl/866101','DOE-PATENT-XML'); return false;" href="https://www.osti.gov/servlets/purl/866101"><span>Apparatus for use in <span class="hlt">sulfide</span> chemiluminescence detection</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Spurlin, Stanford R.; Yeung, Edward S.</p> <p>1987-01-01</p> <p>A method of chemiluminescently determining a <span class="hlt">sulfide</span> which is either hydrogen <span class="hlt">sulfide</span> or methyl mercaptan by reacting the <span class="hlt">sulfide</span> with chlorine dioxide at low pressure and under conditions which allow a longer reaction time in emission of a single photon for every two <span class="hlt">sulfide</span> containing species, and thereafter, chemiluminescently detecting and determining the <span class="hlt">sulfide</span>. The invention also relates not only to the detection method, but the novel chemical reaction and a specifically designed chemiluminescence detection cell for the reaction.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/29064233','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/29064233"><span>Micro-Intertexture Carbon-Free Iron <span class="hlt">Sulfides</span> as Advanced High Tap Density Anodes for Rechargeable Batteries.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Xiao, Ying; Hwang, Jang-Yeon; Sun, Yang-Kook</p> <p>2017-11-15</p> <p>Numerous materials have been considered as promising electrode materials for rechargeable batteries; however, developing efficient materials to achieving good cycling performance and high volumetric energy capacity simultaneously remains a great challenge. Considering the appealing properties of iron <span class="hlt">sulfides</span>, which include low cost, high theoretical capacity, and favorable electrochemical conversion mechanism, in this work, we demonstrate the feasibility of carbon-free microscale Fe 1-x S as high-efficiency anode materials for rechargeable batteries by designing hierarchical intertexture architecture. The as-prepared intertexture Fe 1-x S microspheres constructed from nanoscale units take advantage of both the long cycle life of nanoscale units and the high tap density (1.13 g cm -3 ) of the micro-intertexture Fe 1-x S. As a result, high capacities of 1089.2 mA h g -1 (1230.8 mA h cm -3 ) and 624.7 mA h g -1 (705.9 mA h cm -3 ) were obtained after 100 cycles at 1 A g -1 in Li-ion and Na-ion batteries, respectively, demonstrating one of the best performances for iron <span class="hlt">sulfide-based</span> electrodes. Even after deep cycling at 20 A g -1 , satisfactory capacities could be retained. Related results promote the practical application of <span class="hlt">metal</span> <span class="hlt">sulfides</span> as high-capacity electrodes with high rate capability for next-generation rechargeable batteries.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2006MinDe..41..453J','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2006MinDe..41..453J"><span>Trace- and rare-earth element geochemistry and Pb-Pb dating of black shales and intercalated Ni-Mo-PGE-Au <span class="hlt">sulfide</span> ores in Lower Cambrian strata, Yangtze Platform, South China</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Jiang, Shao-Yong; Chen, Yong-Quan; Ling, Hong-Fei; Yang, Jing-Hong; Feng, Hong-Zhen; Ni, Pei</p> <p>2006-08-01</p> <p>The Lower Cambrian black shale sequence of the Niutitang Formation in the Yangtze Platform, South China, hosts an extreme <span class="hlt">metal</span>-enriched <span class="hlt">sulfide</span> ore bed that shows >10,000 times enrichment in Mo, Ni, Se, Re, Os, As, Hg, and Sb and >1,000 times enrichment in Ag, Au, Pt, and Pd, when compared to average upper continental crust. We report in this paper trace- and rare-earth-element concentrations and Pb-Pb isotope dating for the Ni-Mo-PGE-Au <span class="hlt">sulfide</span> ores and their host black shales. Both the <span class="hlt">sulfide</span> ores and their host black shales show similar trace-element distribution patterns with pronounced depletion in Th, Nb, Hf, Zr, and Ti, and extreme enrichment in U, Ni, Mo, and V compared to average upper crust. The high-field-strength elements, such as Zr, Hf, Nb, Ta, Sc, Th, rare-earth elements, Rb, and Ga, show significant inter-element correlations and may have been derived mainly from terrigenous sources. The redox sensitive elements, such as V, Ni, Mo, U, and Mn; <span class="hlt">base</span> <span class="hlt">metals</span>, such as Cu, Zn, and Pb; and Sr and Ba may have been derived from mixing of seawater and venting hydrothermal sources. The chondrite-normalized REE patterns, positive Eu and Y anomalies, and high Y/Ho ratios for the Ni-Mo-PGE-Au <span class="hlt">sulfide</span> ores are also suggestive for their submarine hydrothermal-exhalative origin. A stepwise acid-leaching Pb-Pb isotope analytical technique has been employed for the Niutitang black shales and the Ni-Mo-PGE-Au <span class="hlt">sulfide</span> ores, and two Pb-Pb isochron ages have been obtained for the black shales (531±24 Ma) and for the Ni-Mo-PGE-Au <span class="hlt">sulfide</span> ores (521±54 Ma), respectively, which are identical and overlap within uncertainty, and are in good agreement with previously obtained ages for presumed age-equivalent strata.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/22840703','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/22840703"><span>Membrane-<span class="hlt">based</span> microchannel device for continuous quantitative extraction of dissolved free <span class="hlt">sulfide</span> from water and from oil.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Toda, Kei; Ebisu, Yuki; Hirota, Kazutoshi; Ohira, Shin-Ichi</p> <p>2012-09-05</p> <p>Underground fluids are important natural sources of drinking water, geothermal energy, and oil-<span class="hlt">based</span> fuels. To facilitate the surveying of such underground fluids, a novel microchannel extraction device was investigated for in-line continuous analysis and flow injection analysis of <span class="hlt">sulfide</span> levels in water and in oil. Of the four designs investigated, the honeycomb-patterned microchannel extraction (HMCE) device was found to offer the most effective liquid-liquid extraction. In the HMCE device, a thin silicone membrane was sandwiched between two polydimethylsiloxane plates in which honeycomb-patterned microchannels had been fabricated. The identical patterns on the two plates were accurately aligned. The extracted <span class="hlt">sulfide</span> was detected by quenching monitoring of fluorescein mercuric acetate (FMA). The <span class="hlt">sulfide</span> extraction efficiencies from water and oil samples of the HMCE device and of three other designs (two annular and one rectangular channel) were examined theoretically and experimentally. The best performance was obtained with the HMCE device because of its thin sample layer (small diffusion distance) and large interface area. Quantitative extraction from both water and oil could be obtained using the HMCE device. The estimated limit of detection for continuous monitoring was 0.05 μM, and <span class="hlt">sulfide</span> concentrations in the range of 0.15-10 μM could be determined when the acceptor was 5 μM FMA alkaline solution. The method was applied to natural water analysis using flow injection mode, and the data agreed with those obtained using headspace gas chromatography-flame photometric detection. The analysis of hydrogen <span class="hlt">sulfide</span> levels in prepared oil samples was also performed. The proposed device is expected to be used for real time survey of oil wells and groundwater wells. Copyright © 2012 Elsevier B.V. All rights reserved.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/25984451','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/25984451"><span>A new polymer-free drug-eluting stent with nanocarriers eluting sirolimus from stent-plus-balloon compared with bare-<span class="hlt">metal</span> stent and with biolimus A9 eluting stent in porcine coronary arteries.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Takimura, Celso K; Galon, Micheli Z; Gutierrez, Paulo S; Sojitra, Prakash; Vyas, Ashwin; Doshi, Manish; Lemos, Pedro A</p> <p>2015-04-01</p> <p>Permanent polymers in first generation drug-eluting stent (DES) have been imputed to be a possible cause of persistent inflammation, remodeling, malapposition and late stent thrombosis. We aim to describe the in vivo experimental result of a new polymer-free DES eluting sirolimus from stent-plus-balloon (Focus np stent, Envision Scientific) compared with a bare-<span class="hlt">metal</span> stent (<span class="hlt">BMS</span>) (Amazonia CroCo, Minvasys) and with a biolimus A9 eluting stent (Biomatrix, Biosensors). In 10 juvenile pigs, 23 coronary stents were implanted in the coronary arteries (8 Amazonia CroCo, 8 Focus np, and 7 Biomatrix). At 28-day follow-up, optical coherence tomography (OCT) and histology were used to evaluate neointimal hyperplasia and healing response. According to OCT analysis, Focus np stents had a greater lumen area and less neointimal hyperplasia response than <span class="hlt">BMS</span> and Biomatrix had. Histomorphometry results showed less neointimal hyperplasia in Focus np than in <span class="hlt">BMS</span>. Histology showed a higher fibrin deposition in Biomatrix stent compared to Focus np and <span class="hlt">BMS</span>. The new polymer-free DES with sirolimus eluted from stent-plus-balloon demonstrated safety and reduced neointimal proliferation compared with the <span class="hlt">BMS</span> and Biomatrix stents at 28-day follow-up in this porcine coronary model. This new polymer-free DES is promising and warrants further clinical studies.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://pubs.er.usgs.gov/publication/70034147','USGSPUBS'); return false;" href="https://pubs.er.usgs.gov/publication/70034147"><span>Source and fate of inorganic soil contamination around the abandoned Phillips <span class="hlt">sulfide</span> mine, hudson Highlands, New York</span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Gilchrist, S.; Gates, A.; Elzinga, E.; Gorring, M.; Szabo, Z.</p> <p>2011-01-01</p> <p>The abandoned Phillips <span class="hlt">sulfide</span> mine in the critical Highlands watershed in New York has been shown to produce strongly acidic mine drainage (AMD) with anomalous <span class="hlt">metal</span> contaminants in first-order streams that exceeded local water standards by up to several orders of magnitude (Gilchrist et al., 2009). The <span class="hlt">metal-sulfide</span>-rich tailings also produce contaminated soils with pH < 4, organic matter < 2.5% and trace <span class="hlt">metals</span> sequestered in soil oxides. A geochemical transect to test worst-case soil contamination showed that Cr, Co and Ni correlated positively with Mn, (r = 0.72, r= 0.89, r = 0.80, respectively), suggesting Mn-oxide sequestration and that Cu and Pb correlated with Fe (r = 0.76, r = 0.83, respectively), suggesting sequestration in goethite. Ubiquitous, yellow coating on the mine wastes, including jarosite and goethite, is a carrier of the <span class="hlt">metals</span>. Geochemical and μ-SXRF analyses determined Cu to be the major soil contaminant. μ-SXRF also demonstrated that the heterogeneous nature of the soil chemistry at the micro-meter scale is self-similar to those in the bulk soil samples. Generally <span class="hlt">metals</span> decreased, with some fluctuations, rapidly downslope through suspension of fines and dissolution in AMD leaving the area of substantial contamination << 0.5 km from the source.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/29655189','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/29655189"><span>Highly Tunable Heterojunctions from Multimetallic <span class="hlt">Sulfide</span> Nanoparticles and Silver Nanowires.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Liu, Dongliang; Liu, Yong; Huang, Peng; Zhu, Cheng; Kang, Zhenhui; Shu, Jie; Chen, Muzi; Zhu, Xing; Guo, Jun; Zhuge, Lanjian; Bu, Xianhui; Feng, Pingyun; Wu, Tao</p> <p>2018-05-04</p> <p>A facile and general strategy is presented to create well-defined heterojunctions with ultra-small multimetallic <span class="hlt">sulfide</span> nanoparticles (MMSNPs) uniformly coated on sliver nanowires. A unique aspect of this method is the atomic-level pre-integration of multimetallic components by exploiting recently developed supertetrahedral <span class="hlt">metal</span> <span class="hlt">sulfide</span> nanoclusters. The use of such nanoclusters also enables the convenient formation of the ultrathin interfacial Ag 2 S layer via etching. The heterojunctions (denoted as MMSNPs/Ag 2 S/Ag-NWs) benefit from adjustable multimetallic components and display tunable visible-light-driven photocatalytic performance owing to the synergistic effect of multimetallic components from MMSNPs and the high carrier mobility of Ag-NWs. The synthetic strategy opens new routes to designing and fabricating various heterojunctions with multimetallic components, which could further expand their applications in catalysis, electronics, and photonics. © 2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/biblio/7004386','DOE-PATENT-XML'); return false;" href="https://www.osti.gov/biblio/7004386"><span>Apparatus for use in <span class="hlt">sulfide</span> chemiluminescence detection</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Spurlin, S.R.; Yeung, E.S.</p> <p>1987-01-06</p> <p>A method is described for chemiluminescently determining a <span class="hlt">sulfide</span> which is either hydrogen <span class="hlt">sulfide</span> or methyl mercaptan by reacting the <span class="hlt">sulfide</span> with chlorine dioxide at low pressure and under conditions which allow a longer reaction time in emission of a single photon for every two <span class="hlt">sulfide</span> containing species, and thereafter, chemiluminescently detecting and determining the <span class="hlt">sulfide</span>. The invention also relates not only to the detection method, but the novel chemical reaction and a specifically designed chemiluminescence detection cell for the reaction. 4 figs.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2018GeCoA.230..155C','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2018GeCoA.230..155C"><span><span class="hlt">Sulfide</span> enrichment at an oceanic crust-mantle transition zone: Kane Megamullion (23°N, MAR)</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Ciazela, Jakub; Koepke, Juergen; Dick, Henry J. B.; Botcharnikov, Roman; Muszynski, Andrzej; Lazarov, Marina; Schuth, Stephan; Pieterek, Bartosz; Kuhn, Thomas</p> <p>2018-06-01</p> <p>The Kane Megamullion oceanic core complex located along the Mid-Atlantic Ridge (23°30‧N, 45°20‧W) exposes lower crust and upper mantle directly on the ocean floor. We studied chalcophile elements and <span class="hlt">sulfides</span> in the ultramafic and mafic rocks of the crust-mantle transition and the mantle underneath. We determined mineralogical and elemental composition and the Cu isotope composition of the respective <span class="hlt">sulfides</span> along with the mineralogical and elemental composition of the respective serpentines. The rocks of the crust-mantle transition zone (i.e., plagioclase harzburgite, peridotite-gabbro contacts, and dunite) overlaid by troctolites are by one order of magnitude enriched in several chalcophile elements with respect to the spinel harzburgites of the mantle beneath. Whereas the range of Cu concentrations in spinel harzburgites is 7-69 ppm, the Cu concentrations are highly elevated in plagioclase harzburgites with a range of 90-209 ppm. The zones of the peridotite-gabbro contacts are even more enriched, exhibiting up to 305 ppm Cu and highly elevated concentrations of As, Zn, Ga, Sb and Tl. High Cu concentrations show pronounced correlation with bulk S concentrations at the crust-mantle transition zone implying an enrichment process in this horizon of the oceanic lithosphere. We interpret this enrichment as related to melt-mantle reaction, which is extensive in crust-mantle transition zones. In spite of the ubiquitous serpentinization of primary rocks, we found magmatic chalcopyrites [CuFeS2] as inclusions in plagioclase as well as associated with pentlandite [(Fe,Ni)9S8] and pyrrhotite [Fe1-xS] in polysulfide grains. These chalcopyrites show a primary magmatic δ65Cu signature ranging from -0.04 to +0.29 ‰. Other chalcopyrites have been dissolved during serpentinization. Due to the low temperature (<300 °C) of circulating fluids chalcophile <span class="hlt">metals</span> from primary <span class="hlt">sulfides</span> have not been mobilized and transported away but have been trapped in smaller secondary</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/26456071','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/26456071"><span>Ion-Exchangeable Molybdenum <span class="hlt">Sulfide</span> Porous Chalcogel: Gas Adsorption and Capture of Iodine and Mercury.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Subrahmanyam, Kota S; Malliakas, Christos D; Sarma, Debajit; Armatas, Gerasimos S; Wu, Jinsong; Kanatzidis, Mercouri G</p> <p>2015-11-04</p> <p>We report the synthesis of ion-exchangeable molybdenum <span class="hlt">sulfide</span> chalcogel through an oxidative coupling process, using (NH4)2MoS4 and iodine. After supercritical drying, the MoS(x) amorphous aerogel shows a large surface area up to 370 m(2)/g with a broad range of pore sizes. X-ray photoelectron spectroscopic and pair distribution function analyses reveal that Mo(6+) species undergo reduction during network assembly to produce Mo(4+)-containing species where the chalcogel network consists of [Mo3S13] building blocks comprising triangular Mo <span class="hlt">metal</span> clusters and S2(2-) units. The optical band gap of the brown-black chalcogel is ∼1.36 eV. The ammonium sites present in the molybdenum <span class="hlt">sulfide</span> chalcogel network are ion-exchangeable with K(+) and Cs(+) ions. The molybdenum <span class="hlt">sulfide</span> aerogel exhibits high adsorption selectivities for CO2 and C2H6 over H2 and CH4. The aerogel also possesses high affinity for iodine and mercury.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2016MMTB...47..344H','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2016MMTB...47..344H"><span>Selective <span class="hlt">Sulfidation</span> of Lead Smelter Slag with Sulfur</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Han, Junwei; Liu, Wei; Wang, Dawei; Jiao, Fen; Qin, Wenqing</p> <p>2016-02-01</p> <p>The selective <span class="hlt">sulfidation</span> of lead smelter slag with sulfur was studied. The effects of temperature, sulfur dosage, carbon, and Na salts additions were investigated <span class="hlt">based</span> on thermodynamic calculation. The results indicated that more than 96 pct of zinc in the slag could be converted into <span class="hlt">sulfides</span>. Increasing temperature, sulfur dosage, or Na salts dosage was conducive to the <span class="hlt">sulfidation</span> of the zinc oxides in the slag. High temperature and excess Na salts would result in the more consumption of carbon and sulfur. Carbon addition not only promoted the selective <span class="hlt">sulfidation</span> but reduced the sulfur dosage and eliminated the generation of SO2. Iron oxides had a buffering role on the sulfur efficient utilization. The transformation of sphalerite to wurtzite was feasible under reducing condition at high temperature, especially above 1273 K (1000 °C). The growth of ZnS particles largely depended upon the roasting temperature. They were significantly increased when the temperature was above 1273 K (1000 °C), which was attributed to the formation of a liquid phase.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://pubs.er.usgs.gov/publication/70144083','USGSPUBS'); return false;" href="https://pubs.er.usgs.gov/publication/70144083"><span>Porewater dynamics of silver, lead and copper in coastal sediments and implications for benthic <span class="hlt">metal</span> fluxes</span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Kalnejais, Linda H.; Martin, W. R.; Bothner, Michael H.</p> <p>2015-01-01</p> <p>To determine the conditions that lead to a diffusive release of dissolved <span class="hlt">metals</span> from coastal sediments, porewater profiles of Ag, Cu, and Pb have been collected over seven years at two contrasting coastal sites in Massachusetts, USA. The Hingham Bay (HB) site is a contaminated location in Boston Harbor, while the Massachusetts Bay (MB) site is 11 km offshore and less impacted. At both sites, the biogeochemical cycles include scavenging by Fe-oxyhydroxides and release of dissolved <span class="hlt">metals</span> when Fe-oxyhydroxides are reduced. Important differences in the <span class="hlt">metal</span> cycles at the two sites, however, result from different redox conditions. Porewater <span class="hlt">sulfide</span> and seasonal variation in redox zone depth is observed at HB, but not at MB. In summer, as the conditions become more reducing at HB, trace <span class="hlt">metals</span> are precipitated as <span class="hlt">sulfides</span> and are no longer associated with Fe-oxyhydroxides. <span class="hlt">Sulfide</span> precipitation close to the sediment–water interface limits the trace <span class="hlt">metal</span> flux in summer and autumn at HB, while in winter, oxidation of the <span class="hlt">sulfide</span> phases drives high benthic fluxes of Cu and Ag, as oxic conditions return. The annual diffusive flux of Cu at HB is found to be significant and contributes to the higher than expected water column Cu concentrations observed in Boston Harbor. At MB, due to the lower <span class="hlt">sulfide</span> concentrations, the association of trace <span class="hlt">metals</span> with Fe-oxyhydroxides occurs throughout the year, leading to more stable fluxes. A surface enrichment of solid phase trace <span class="hlt">metals</span> was found at MB and is attributed to the persistent scavenging by Fe-oxyhydroxides. This process is important, particularly at sites that are less reducing, because it maintains elevated <span class="hlt">metal</span> concentrations at the surface despite the effects of bioturbation and sediment accumulation, and because it may increase the persistence of <span class="hlt">metal</span> contamination in surface sediments.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=5133402','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=5133402"><span>Randomised comparison of drug-eluting versus bare-<span class="hlt">metal</span> stenting in patients with non-ST elevation myocardial infarction</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Remkes, Wouter S; Badings, Erik A; Hermanides, Renicus S; Rasoul, Saman; Dambrink, Jan-Henk E; Koopmans, Petra C; The, Salem HK; Ottervanger, Jan Paul; Gosselink, A T Marcel; Hoorntje, Jan CA; Suryapranata, Harry; van 't Hof, Arnoud WJ</p> <p>2016-01-01</p> <p>Objective The superiority of drug-eluting stents (DES) over bare-<span class="hlt">metal</span> stents (<span class="hlt">BMS</span>) in patients with ST elevation myocardial infarction (STEMI) is well studied; however, randomised data in patients with non-ST elevation myocardial infarction (NSTEMI) are lacking. The objective of this study was to investigate whether stenting with everolimus-eluting stents (EES) safely reduces restenosis in patients with NSTEMI as compared to <span class="hlt">BMS</span>. Methods ELISA-3 patients were asked to participate in the angiographic substudy and were randomised to DE (Xience V) or BM (Vision) stenting (ELISA-3 group). The primary end point was minimal luminal diameter (MLD) at 9-month follow-up angiography. In addition, 296 patients with NSTEMI who were excluded or did not want to participate in the ELISA-3 trial (RELI group) were randomised to DE or BM stenting and underwent clinical follow-up only (major adverse cardiac events (MACE), stent thrombosis (ST)). A pooled analysis was performed to assess an effect on clinical outcome. Results 178 of 540 ELISA-3 patients participated in the angiographic substudy. MLD at 9 months angiography was 2.37±0.63 mm (DES) versus 1.84±0.62 mm (<span class="hlt">BMS</span>), p<0.001. Binary restenosis occurred in 1.9% in the DES group versus 16.7% in the <span class="hlt">BMS</span> group (RR 0.11, 95% CI 0.02 to 0.84, p=0.007). In the pooled analysis, the incidence of MACE, target vessel revascularisation and ST at 2 years follow-up in the DES versus <span class="hlt">BMS</span> group was 12.5% versus 16.0% (p=0.28), 4.0% versus 10.4% (p=0.009) and 1.3% versus 3.0% (p=0.34), respectively. Conclusions In patients with NSTEMI, use of EES is safe and decreases both angiographic and clinical restenosis as compared to <span class="hlt">BMS</span> http://www.isrctn.com/search?q=39230163. Trial registration number 39230163; Post-results. PMID:27933192</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/19956940','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/19956940"><span>Functional consortium for denitrifying <span class="hlt">sulfide</span> removal process.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Chen, Chuan; Ren, Nanqi; Wang, Aijie; Liu, Lihong; Lee, Duu-Jong</p> <p>2010-03-01</p> <p>Denitrifying <span class="hlt">sulfide</span> removal (DSR) process simultaneously converts <span class="hlt">sulfide</span>, nitrate, and chemical oxygen demand from industrial wastewaters to elemental sulfur, nitrogen gas, and carbon dioxide, respectively. This investigation utilizes a dilution-to-extinction approach at 10(-2) to 10(-6) dilutions to elucidate the correlation between the composition of the microbial community and the DSR performance. In the original suspension and in 10(-2) dilution, the strains Stenotrophomonas sp., Thauera sp., and Azoarcus sp. are the heterotrophic denitrifiers and the strains Paracoccus sp. and Pseudomonas sp. are the <span class="hlt">sulfide</span>-oxidizing denitrifers. The 10(-4) dilution is identified as the functional consortium for the present DSR system, which comprises two functional strains, Stenotrophomonas sp. strain Paracoccus sp. At 10(-6) dilution, all DSR performance was lost. The functions of the constituent cells in the DSR granules were discussed <span class="hlt">based</span> on data obtained using the dilution-to-extinction approach.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/12226868','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/12226868"><span>Effect of particle-particle shearing on the bioleaching of <span class="hlt">sulfide</span> minerals.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Chong, N; Karamanev, D G; Margaritis, A</p> <p>2002-11-05</p> <p>The biological leaching of <span class="hlt">sulfide</span> minerals, used for the production of gold, copper, zinc, cobalt, and other <span class="hlt">metals</span>, is very often carried out in slurry bioreactors, where the shearing between <span class="hlt">sulfide</span> particles is intensive. In order to be able to improve the efficiency of the bioleaching, it is of significant importance to know the effect of particle shearing on the rate of leaching. The recently proposed concept of ore immobilization allowed us to study the effect of particle shearing on the rate of <span class="hlt">sulfide</span> (pyrite) leaching by Thiobacillus ferrooxidans. Using this concept, we designed two very similar bioreactors, the main difference between which was the presence and absence of particle-particle shearing. It was shown that when the oxygen mass transfer was not the rate-limiting step, the rate of bioleaching in the frictionless bioreactor was 2.5 times higher than that in a bioreactor with particle friction (shearing). The concentration of free suspended cells in the frictionless bioreactor was by orders of magnitude lower than that in the frictional bioreactor, which showed that particle friction strongly reduces the microbial attachment to <span class="hlt">sulfide</span> surface, which, in turn, reduces the rate of bioleaching. Surprisingly, it was found that formation of a layer of insoluble iron salts on the surface of <span class="hlt">sulfide</span> particles is much slower under shearless conditions than in the presence of particle-particle shearing. This was explained by the effect of particle friction on liquid-solid mass transfer rate. The results of this study show that reduction of the particle friction during bioleaching of <span class="hlt">sulfide</span> minerals can bring important advantages not only by increasing significantly the bioleaching rate, but also by increasing the rate of gas-liquid oxygen mass transfer, reducing the formation of iron precipitates and reducing the energy consumption. One of the efficient methods for reduction of particle friction is ore immobilization in a porous matrix. Copyright 2002</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/28771846','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/28771846"><span>Amorphous Transition <span class="hlt">Metal</span> <span class="hlt">Sulfides</span> Anchored on Amorphous Carbon-Coated Multiwalled Carbon Nanotubes for Enhanced Lithium-Ion Storage.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Jin, Rencheng; Zhai, Qinghe; Wang, Qingyao</p> <p>2017-10-09</p> <p>Cobalt <span class="hlt">sulfide</span> and molybdenum <span class="hlt">sulfide</span>, with high theoretical capacities, have been considered as one of most promising anode materials for lithium-ion batteries (LIBs). However, the poor cyclability and low rate performances originating from the large volume expansion and poor electrical conductivity extremely inhibit their practical application. Here, the electrochemical performances are effectively improved by growing amorphous cobalt <span class="hlt">sulfide</span> and molybdenum <span class="hlt">sulfide</span> onto amorphous carbon-coated multiwalled carbon nanotubes (CNTs@C@CoS 2 and CNTs@C@MoS 2 ). The CNTs@C@CoS 2 presents a high reversible specific capacity of 1252 mAh g -1 at 0.2 Ag -1 , excellent rate performance of 672 mAh g -1 (5 Ag -1 ), and enhanced cycle life of 598 mAh g -1 after 500 cycles at 2 Ag -1 . For CNTs@C@MoS 2 , it exhibits a specific capacity of 1395 mAh g -1 , superior rate performance of 727 mAh g -1 at 5 Ag -1 , and long cycle stability (796 mAh g -1 after 500 cycles at 2 Ag -1 ). The enhanced electrochemical properties of the electrodes are probably ascribed to their amorphous nature, the combination of CNTs@C that adhered and hindered the agglomeration of CoS 2 and MoS 2 as well as the enhanced electronic conductivity. © 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/servlets/purl/864937','DOE-PATENT-XML'); return false;" href="https://www.osti.gov/servlets/purl/864937"><span>Positive electrode current collector for liquid <span class="hlt">metal</span> cells</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Shimotake, Hiroshi; Bartholme, Louis G.</p> <p>1984-01-01</p> <p>A current collector for the positive electrode of an electrochemical cell with a positive electrode including a <span class="hlt">sulfide</span>. The cell also has a negative electrode and a molten salt electrolyte including halides of a <span class="hlt">metal</span> selected from the alkali <span class="hlt">metals</span> and the alkaline earth <span class="hlt">metals</span> in contact with both the positive and negative electrodes. The current collector has a <span class="hlt">base</span> <span class="hlt">metal</span> of copper, silver, gold, aluminum or alloys thereof with a coating thereon of iron, nickel, chromium or alloys thereof. The current collector when subjected to cell voltage forms a sulfur-containing compound on the surface thereby substantially protecting the current collector from further attack by sulfur ions during cell operation. Both electroless and electrolytic processes may be used to deposit coatings.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/28406018','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/28406018"><span>Synthesis of HIV-Maturation Inhibitor <span class="hlt">BMS</span>-955176 from Betulin by an Enabling Oxidation Strategy.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Ortiz, Adrian; Soumeillant, Maxime; Savage, Scott A; Strotman, Neil A; Haley, Matthew; Benkovics, Tamas; Nye, Jeffrey; Xu, Zhongmin; Tan, Yichen; Ayers, Sloan; Gao, Qi; Kiau, Susanne</p> <p>2017-05-05</p> <p>A concise and scalable second generation synthesis of HIV maturation inhibitor <span class="hlt">BMS</span>-955176 is described. The synthesis is framed by an oxidation strategy highlighted by a Cu I mediated aerobic oxidation of betulin, a highly selective PIFA mediated dehydrogenation of an oxime, and a subsequent Lossen rearrangement which occurs through a unique reaction mechanism for the installation of the C17 amino functionality. The synthetic route proceeds in 7 steps with 47% overall yield and begins from the abundant and inexpensive natural product betulin.</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_21");'>21</a></li> <li><a href="#" onclick='return showDiv("page_22");'>22</a></li> <li class="active"><span>23</span></li> <li><a href="#" onclick='return showDiv("page_24");'>24</a></li> <li><a href="#" onclick='return showDiv("page_25");'>25</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_23 --> <div id="page_24" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_21");'>21</a></li> <li><a href="#" onclick='return showDiv("page_22");'>22</a></li> <li><a href="#" onclick='return showDiv("page_23");'>23</a></li> <li class="active"><span>24</span></li> <li><a href="#" onclick='return showDiv("page_25");'>25</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="461"> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=5495159','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=5495159"><span>Coordination polymer structure and revisited hydrogen evolution catalytic mechanism for amorphous molybdenum <span class="hlt">sulfide</span></span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Tran, Phong D.; Tran, Thu V.; Orio, Maylis; Torelli, Stephane; Truong, Quang Duc; Nayuki, Keiichiro; Sasaki, Yoshikazu; Chiam, Sing Yang; Yi, Ren; Honma, Itaru; Barber, James; Artero, Vincent</p> <p>2017-01-01</p> <p>Molybdenum <span class="hlt">sulfides</span> are very attractive noble-<span class="hlt">metal</span> free electrocatalysts for the hydrogen evolution reaction (HER) from water. Atomic structure and identity of the catalytically active sites have been well established for crystalline molybdenum disulfide (c-MoS2) but not for amorphous molybdenum <span class="hlt">sulfide</span> (a-MoSx) which displays significantly higher HER activity compared to its crystalline counterpart. Here we show that HER–active a-MoSx, prepared either as nanoparticles or as films, is a molecular–<span class="hlt">based</span> coordination polymer consisting of discrete [Mo3S13]2– building blocks. Of the three terminal disulfide (S22–) ligands within these clusters, two are shared to form the polymer chain. The third one remains free and generates molybdenum hydride moieties as the active site under H2 evolution conditions. Such a molecular structure therefore provides a basis for revisiting the mechanism of a-MoSx catalytic activity, as well as explaining some of its special properties such as reductive activation and corrosion. Our findings open up new avenues for the rational optimisation of this HER electrocatalyst as an alternative to platinum. PMID:26974410</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=5436553','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=5436553"><span>Superconductivity and magnetism in iron <span class="hlt">sulfides</span> intercalated by <span class="hlt">metal</span> hydroxides† †Electronic supplementary information (ESI) available. See DOI: 10.1039/c6sc05268a Click here for additional data file.</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Zhou, Xiuquan; Eckberg, Christopher; Wilfong, Brandon; Liou, Sz-Chian; Vivanco, Hector K.; Paglione, Johnpierre</p> <p>2017-01-01</p> <p>Inspired by naturally occurring <span class="hlt">sulfide</span> minerals, we present a new family of iron-<span class="hlt">based</span> superconductors. A metastable form of FeS known as the mineral mackinawite forms two-dimensional sheets that can be readily intercalated by various cationic guest species. Under hydrothermal conditions using alkali <span class="hlt">metal</span> hydroxides, we prepare three different cation and <span class="hlt">metal</span> hydroxide-intercalated FeS phases including (Li1–xFexOH)FeS, [(Na1–xFex)(OH)2]FeS, and KxFe2–yS2. Upon successful intercalation of the FeS layer, the superconducting critical temperature T c of mackinawite is enhanced from 5 K to 8 K for the (Li1–xFexOH)δ+ intercalate. Layered heterostructures of [(Na1–xFex)(OH)2]FeS resemble the natural mineral tochilinite, which contains an iron square lattice interleaved with a hexagonal hydroxide lattice. Whilst heterostructured [(Na1–xFex)(OH)2]FeS displays long-range magnetic ordering near 15 K, KxFe2–yS2 displays short range antiferromagnetism. PMID:28580110</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4456238','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4456238"><span>The Prevalence of Burning Mouth Syndrome: A Population-<span class="hlt">Based</span> Study</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Kohorst, John J.; Bruce, Alison J.; Torgerson, Rochelle R.; Schenck, Louis A.; Davis, Mark D. P.</p> <p>2015-01-01</p> <p>Background Burning mouth syndrome (<span class="hlt">BMS</span>) is defined as symptoms of persistent burning in the mouth without objective findings accounting for the symptoms. Objectives To calculate the point prevalence of <span class="hlt">BMS</span> in Olmsted County, Minnesota, on December 31, 2010. Methods The Rochester Epidemiology Project (REP) medical records linkage system was used to identify <span class="hlt">BMS</span> cases diagnosed or potentially diagnosed before December 31, 2009. Inclusion criteria were subjective oral discomfort, normal oral examination, and documented <span class="hlt">BMS</span> diagnosis by a REP physician. Results In total, 149 <span class="hlt">BMS</span> cases were confirmed, representing age- and sex-adjusted point prevalence of <span class="hlt">BMS</span> in Olmsted County of 0.11%, or 105.6 (95% CI, 88.6–122.6) per 100,000 persons. Age-adjusted prevalence in women was significantly higher than men: 168.6 (95% CI, 139.0–198.2) vs 35.9 (95% CI, 21.4–50.3) per 100,000 persons (P<.001). The highest prevalence was in women aged 70 through 79 years (527.9 per 100,000 persons). Mean (SD) age at <span class="hlt">BMS</span> diagnosis was 59.4 (15.1) years (range, 25–90 years). Conclusions To our knowledge, we provide the first report of population-<span class="hlt">based</span> <span class="hlt">BMS</span> prevalence. The data show that <span class="hlt">BMS</span> most commonly affects women older than 50 years, and when defined through diagnostic criteria, it is less prevalent than described previously. PMID:25495557</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.gpo.gov/fdsys/pkg/CFR-2013-title30-vol2/pdf/CFR-2013-title30-vol2-sec250-808.pdf','CFR2013'); return false;" href="https://www.gpo.gov/fdsys/pkg/CFR-2013-title30-vol2/pdf/CFR-2013-title30-vol2-sec250-808.pdf"><span>30 CFR 250.808 - Hydrogen <span class="hlt">sulfide</span>.</span></a></p> <p><a target="_blank" href="http://www.gpo.gov/fdsys/browse/collectionCfr.action?selectedYearFrom=2013&page.go=Go">Code of Federal Regulations, 2013 CFR</a></p> <p></p> <p>2013-07-01</p> <p>... 30 Mineral Resources 2 2013-07-01 2013-07-01 false Hydrogen <span class="hlt">sulfide</span>. 250.808 Section 250.808 Mineral Resources BUREAU OF SAFETY AND ENVIRONMENTAL ENFORCEMENT, DEPARTMENT OF THE INTERIOR OFFSHORE OIL... § 250.808 Hydrogen <span class="hlt">sulfide</span>. Production operations in zones known to contain hydrogen <span class="hlt">sulfide</span> (H2S) or in...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.gpo.gov/fdsys/pkg/CFR-2014-title30-vol2/pdf/CFR-2014-title30-vol2-sec250-808.pdf','CFR2014'); return false;" href="https://www.gpo.gov/fdsys/pkg/CFR-2014-title30-vol2/pdf/CFR-2014-title30-vol2-sec250-808.pdf"><span>30 CFR 250.808 - Hydrogen <span class="hlt">sulfide</span>.</span></a></p> <p><a target="_blank" href="http://www.gpo.gov/fdsys/browse/collectionCfr.action?selectedYearFrom=2014&page.go=Go">Code of Federal Regulations, 2014 CFR</a></p> <p></p> <p>2014-07-01</p> <p>... 30 Mineral Resources 2 2014-07-01 2014-07-01 false Hydrogen <span class="hlt">sulfide</span>. 250.808 Section 250.808 Mineral Resources BUREAU OF SAFETY AND ENVIRONMENTAL ENFORCEMENT, DEPARTMENT OF THE INTERIOR OFFSHORE OIL... § 250.808 Hydrogen <span class="hlt">sulfide</span>. Production operations in zones known to contain hydrogen <span class="hlt">sulfide</span> (H2S) or in...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.gpo.gov/fdsys/pkg/CFR-2012-title30-vol2/pdf/CFR-2012-title30-vol2-sec250-808.pdf','CFR2012'); return false;" href="https://www.gpo.gov/fdsys/pkg/CFR-2012-title30-vol2/pdf/CFR-2012-title30-vol2-sec250-808.pdf"><span>30 CFR 250.808 - Hydrogen <span class="hlt">sulfide</span>.</span></a></p> <p><a target="_blank" href="http://www.gpo.gov/fdsys/browse/collectionCfr.action?selectedYearFrom=2012&page.go=Go">Code of Federal Regulations, 2012 CFR</a></p> <p></p> <p>2012-07-01</p> <p>... 30 Mineral Resources 2 2012-07-01 2012-07-01 false Hydrogen <span class="hlt">sulfide</span>. 250.808 Section 250.808 Mineral Resources BUREAU OF SAFETY AND ENVIRONMENTAL ENFORCEMENT, DEPARTMENT OF THE INTERIOR OFFSHORE OIL... § 250.808 Hydrogen <span class="hlt">sulfide</span>. Production operations in zones known to contain hydrogen <span class="hlt">sulfide</span> (H2S) or in...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://pubs.er.usgs.gov/publication/70016264','USGSPUBS'); return false;" href="https://pubs.er.usgs.gov/publication/70016264"><span>As, Bi, Hg, S, Sb, Sn and Te geochemistry of the J-M Reef, Stillwater Complex, Montana: constraints on the origin of PGE-enriched <span class="hlt">sulfides</span> in layered intrusions</span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Zientek, M.L.; Fries, T.L.; Vian, R.W.</p> <p>1990-01-01</p> <p>The J-M Reef is an interval of disseminated <span class="hlt">sulfides</span> in the Lower Banded series of the Stillwater Complex that is enriched in the platinum group elements (PGE). Palladium and Pt occur in solid solution in <span class="hlt">base-metal</span> <span class="hlt">sulfides</span> and as discrete PGE minerals. PGE minerals include <span class="hlt">sulfides</span>, tellurides, arsenides, antimonides, bismuthides, and alloys with Fe, Sn, Hg, and Au. Several subpopulations can be delineated <span class="hlt">based</span> on whole-rock chemical analyses for As, Bi, Cu, Hg, Pd, Pt, S, Sb and Te for samples collected from and adjacent to the J-M Reef. In general, samples from within the reef have higher Pt/Cu, Pd/Cu, Pd/Pt, Te/Bi and S/(Te+Bi) than those collected adjacent to the reef. Vertical compositional profiles through the reef suggest that Pd/Cu and Pt/Cu decrease systematically upsection from mineralized to barren rock. The majority of samples with elevated As, Sb and Hg occur adjacent to the reef, not within it, or in <span class="hlt">sulfide</span>-poor rocks. Neither magma mixing nor fluid migration models readily explain why the minor quantities of <span class="hlt">sulfide</span> minerals immediately adjacent to the <span class="hlt">sulfide</span>-enriched layers that form the J-M Reef have different element ratios than the <span class="hlt">sulfide</span> minerals that form the reef. If all the <span class="hlt">sulfides</span> formed by exsolution during a magma mixing event and the modal proportion of <span class="hlt">sulfide</span> now in the rocks are simply the result of mechanical processes that concentrated the <span class="hlt">sulfides</span> into some layers and not others, then the composition of the <span class="hlt">sulfide</span> would not be expected to be different. Models that rely upon ascending liquids or fluids are incompatible with the presence of <span class="hlt">sulfides</span> that are not enriched in PGE immediately below or interlayered with the PGE-enriched <span class="hlt">sulfides</span> layers. PGE-enriched postcumulus fluids should have reacted to the same extent with <span class="hlt">sulfides</span> immediately outside the reef as within the reef. One explanation is that some of the <span class="hlt">sulfide</span> minerals in the rocks outside the reef have a different origin than those that make up the reef. The</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/1994MMTB...25..773L','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/1994MMTB...25..773L"><span>Density measurements of the lithium fluoride/lithium <span class="hlt">sulfide</span> eutectic at high temperature</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Lloyd, Charles L.; Gilbert, James B.</p> <p>1994-10-01</p> <p>A straightforward and reliable method to determine densities of molten salts at high temperatures was de-veloped by Janz and Lorenz several years ago.[1] This method was followed in order to determine the density of the LiF/Li2S eutectic[2] over the temperature range of 1176 to 1355 K in which the eutectic is liquid. The rel-ative lack of data for this eutectic is surprising given its potential usefulness in the study of advanced batteries'31 and electrowinning of <span class="hlt">metals</span> from molten <span class="hlt">sulfides</span>.[41] The method is <span class="hlt">based</span> on the fact that a solid piece of <span class="hlt">metal</span> of known volume suspended from a pan balance into a molten salt will weigh less than if it were sus-pended in air at the same temperature. This difference in weight measured in grams will be equal to the buoyant force of the liquid at that temperature. The density of the salt bath can then readily be determined by dividing this difference by the volume of the solid piece of <span class="hlt">metal</span> that is immersed in the bath. The procedure can be re-peated to give density values over a range of temperatures.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/25104030','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/25104030"><span><span class="hlt">Metal</span> resistance in acidophilic microorganisms and its significance for biotechnologies.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Dopson, Mark; Holmes, David S</p> <p>2014-10-01</p> <p>Extremely acidophilic microorganisms have an optimal pH of <3 and are found in all three domains of life. As <span class="hlt">metals</span> are more soluble at acid pH, acidophiles are often challenged by very high <span class="hlt">metal</span> concentrations. Acidophiles are <span class="hlt">metal</span>-tolerant by both intrinsic, passive mechanisms as well as active systems. Passive mechanisms include an internal positive membrane potential that creates a chemiosmotic gradient against which <span class="hlt">metal</span> cations must move, as well as the formation of <span class="hlt">metal</span> sulfate complexes reducing the concentration of the free <span class="hlt">metal</span> ion. Active systems include efflux proteins that pump <span class="hlt">metals</span> out of the cytoplasm and conversion of the <span class="hlt">metal</span> to a less toxic form. Acidophiles are exploited in a number of biotechnologies including biomining for <span class="hlt">sulfide</span> mineral dissolution, biosulfidogenesis to produce <span class="hlt">sulfide</span> that can selectively precipitate <span class="hlt">metals</span> from process streams, treatment of acid mine drainage, and bioremediation of acidic <span class="hlt">metal</span>-contaminated milieux. This review describes how acidophilic microorganisms tolerate extremely high <span class="hlt">metal</span> concentrations in biotechnological processes and identifies areas of future work that hold promise for improving the efficiency of these applications.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2018ApSS..430..515Z','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2018ApSS..430..515Z"><span>Enhanced photocatalytic H2 production of Mn0.5Cd0.5S solid solution through loading transition <span class="hlt">metal</span> <span class="hlt">sulfides</span> XS (X = Mo, Cu, Pd) cocatalysts</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Zhai, Huishan; Liu, Xiaolei; Wang, Peng; Huang, Baibiao; Zhang, Qianqian</p> <p>2018-02-01</p> <p>Development of highly efficient cocatalyst is important towards photocatalytic H2 production. Herein, a series of transition <span class="hlt">metal</span> <span class="hlt">sulfides</span> XS (X = Mo, Cu, Pd) as cocatalysts have been successfully grown on Mn0.5Cd0.5S photocatalyst through photo-reduction or in-situ deposition method, respectively. Among them, the maximum production of H2 obtained from MoS2/Mn0.5Cd0.5S, CuxS/Mn0.5Cd0.5S (1 ≤ x ≤ 2) and PdS/Mn0.5Cd0.5S samples were 197, 347 and 614 μmol/h, which were around 6.5, 11.5 and 20.3 times than pristine Mn0.5Cd0.5S. MoS2/Mn0.5Cd0.5S heterostructure can facilitate electron transfer from Mn0.5Cd0.5S to MoS2 and MoS2 as active site for H2 production, p-n junction constructed between Mn0.5Cd0.5S and CuxS can efficiently separate the photo-generated carriers and PdS as a hole acceptor can accelerate the consume of photo-generated holes to enhance the photocatalytic H2 production. The effective charge transfer was further proved by the weaker PL intensity and stronger photocurrent density relative to that of Mn0.5Cd0.5S alone. This work demonstrated that transition <span class="hlt">metal</span> <span class="hlt">sulfides</span> XS (X = Mo, Cu, Pd) are efficient cocatalysts to improve the H2 production performance of Mn0.5Cd0.5S photocatalyst.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/26856868','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/26856868"><span>Assessment of sediment quality <span class="hlt">based</span> on acid-volatile <span class="hlt">sulfide</span> and simultaneously extracted <span class="hlt">metals</span> in heavily industrialized area of Asaluyeh, Persian Gulf: concentrations, spatial distributions, and sediment bioavailability/toxicity.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Arfaeinia, Hossein; Nabipour, Iraj; Ostovar, Afshin; Asadgol, Zahra; Abuee, Ehsan; Keshtkar, Mozhgan; Dobaradaran, Sina</p> <p>2016-05-01</p> <p>Sediment samples from the coastal area of Asaluyeh harbor were collected during autumn and spring 2015. The acid-volatile <span class="hlt">sulfide</span> (AVS) and simultaneously extracted <span class="hlt">metals</span> (SEMs) were measured to assess the sediment quality and potential ecological risks. The average concentrations (and relative standard deviation (RSD)) of AVS in the industrial sediments were 12.32 μmol/g (36.91) and 6.34 μmol/g (80.05) in autumn and spring, respectively, while in the urban area, these values were 0.44 μmol/g (123.50) and 0.31 μmol/g (160.0) in autumn and spring, respectively. The average concentrations of SEM (and RSD) in the industrial sediments were 15.02 μmol/g (14.38) and 12.34 μmol/g (20.65) in autumn and spring, respectively, while in the urban area, these values were 1.10 μmol/g (43.03) and 1.06 μmol/g (55.59) in autumn and spring, respectively. Zn was the predominant component (34.25-86.24 %) of SEM, while the corresponding value for Cd, much more toxic ingredient, was less than 1 %. Some of the coastal sediments in the harbor of Asaluyeh (20 and 47 % in autumn and spring, respectively) had expected adverse biological effects <span class="hlt">based</span> on the suggested criterion by United States Environmental Protection Agency (USEPA), while most stations (80 and 53 % in autumn and spring, respectively) had uncertain adverse effects.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/biblio/351760-modeling-formation-iron-sulfide-scales-using-thermodynamic-simulation-software','SCIGOV-STC'); return false;" href="https://www.osti.gov/biblio/351760-modeling-formation-iron-sulfide-scales-using-thermodynamic-simulation-software"><span>Modeling the formation of iron <span class="hlt">sulfide</span> scales using thermodynamic simulation software</span></a></p> <p><a target="_blank" href="http://www.osti.gov/search">DOE Office of Scientific and Technical Information (OSTI.GOV)</a></p> <p>Anderko, A.; Shuler, P.J.</p> <p>1998-12-31</p> <p>A program has been developed for generating stability diagrams that concisely represent the thermodynamic state of multicomponent, multiphase aqueous systems in wide ranges of temperature and component concentrations. The diagrams are <span class="hlt">based</span> on a thermodynamic model that combines the Helgeson-Kirkham-Flowers equation of state for standard-state properties with a solutions nonideality model <span class="hlt">based</span> on the activity coefficient expressions developed by Bromley and Pitzer. The diagrams offer a flexible choice of independent variables, which include component concentrations in addition to the potential and pH. The stability diagrams are used to predict the conditions that favor the formation of stable and metastable ironmore » <span class="hlt">sulfide</span> species, which are commonly deposited under oil field-related conditions. First, the diagrams have been applied to establish a sequence of transformations that iron <span class="hlt">sulfides</span> undergo as they age. The predicted transformation sequences take into account environmental variables (e.g., hydrogen <span class="hlt">sulfide</span> concentration, oxygen availability, etc.). The predictions are in agreement with experimental data on iron <span class="hlt">sulfide</span> formation at the iron/solution interface and in bulk solution. The understanding of iron <span class="hlt">sulfide</span> transformation sequences makes it possible to simulate experimental studies of H{sub 2}S/CO{sub 2} corrosion in the presence or absence of oxygen. A comparison with laboratory corrosion rate data under gas pipeline conditions indicates that the magnitude of corrosion rates can be correlated with the predicted stability of metastable iron <span class="hlt">sulfide</span> phases.« less</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://ntrs.nasa.gov/search.jsp?R=19810026274&hterms=metal+acid&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D60%26Ntt%3Dmetal%2Bacid','NASA-TRS'); return false;" href="https://ntrs.nasa.gov/search.jsp?R=19810026274&hterms=metal+acid&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D60%26Ntt%3Dmetal%2Bacid"><span>Hg and Pt-<span class="hlt">metals</span> in meteorite carbon-rich residues - Suggestions for possible host phase for Hg</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Jovanovic, S.; Reed, G. W., Jr.</p> <p>1980-01-01</p> <p>Carbon-rich and oxide residual phases have been isolated from Allende and Murchison by acid demineralization for the determination of their Hg, Pt-<span class="hlt">metal</span>, Cr, Sc, Co, and Fe contents. Experimental procedures used eliminated the possibility of exogenous and endogenous contaminant trace elements from coprecipitating with the residues. Large enrichments of Hg and Pt-<span class="hlt">metals</span> were found in Allende but not in Murchison residues. Hg-release profiles from stepwise heating experiments suggest a <span class="hlt">sulfide</span> as the host for Hg. Diffusion calculations for Hg <span class="hlt">based</span> on these experiments indicate an activation energy of 7-8 kcal/mol, the same as that for Hg in troilite from an iron meteorite. This is further support for a <span class="hlt">sulfide</span> host phase for Hg. Equilibration of Hg with this phase at approximately 900 K is indicated. Reasons for the presence of Pt-<span class="hlt">metals</span> in noncosmic relative abundances are explored.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/29182850','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/29182850"><span>Solid-Solution <span class="hlt">Sulfides</span> Derived from Tunable Layered Double Hydroxide Precursors/Graphene Aerogel for Pseudocapacitors and Sodium-Ion Batteries.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Song, Yajie; Li, Hui; Yang, Lan; Bai, Daxun; Zhang, Fazhi; Xu, Sailong</p> <p>2017-12-13</p> <p>Transition-<span class="hlt">metal</span> <span class="hlt">sulfides</span> (TMSs) are suggested as promising electrode materials for electrochemical pseudocapacitors and lithium- and sodium-ion batteries; however, they typically involve mixed composites or conventionally stoichiometric TMSs (such as NiCo 2 S 4 and Ni 2 CoS 4 ). Herein we demonstrate a preparation of solid-solution <span class="hlt">sulfide</span> (Ni 0.7 Co 0.3 )S 2 supported on three-dimensional graphene aerogel (3DGA) via a sulfuration of NiCo-layered double hydroxide (NiCo-LDH) precursor/3DGA. The electrochemical tests show that the (Ni 0.7 Co 0.3 )S 2 /3DGA electrode exhibits a capacitance of 2165 F g -1 at 1 A g -1 , 2055 F g -1 at 2 A g -1 , and 1478 F g -1 at 10 A g -1 ; preserves 78.5% capacitance retention upon 1000 cycles for pseudocapacitors; and in particular, possesses a relatively high charge capacity of 388.7 mA h g -1 after 50 cycles at 100 mA g -1 as anode nanomaterials for sodium-ion batteries. Furthermore, the electrochemical performances are readily tuned by varying the cationic type of the tunable LDH precursors to prepare different solid-solution <span class="hlt">sulfides</span>, such as (Ni 0.7 Fe 0.3 )S 2 /3DGA and (Co 0.7 Fe 0.3 )S 2 /3DGA. Our results show that engineering LDH precursors can offer an alternative for preparing diverse transition-<span class="hlt">metal</span> <span class="hlt">sulfides</span> for energy storage.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.gpo.gov/fdsys/pkg/CFR-2010-title30-vol2/pdf/CFR-2010-title30-vol2-sec250-504.pdf','CFR'); return false;" href="https://www.gpo.gov/fdsys/pkg/CFR-2010-title30-vol2/pdf/CFR-2010-title30-vol2-sec250-504.pdf"><span>30 CFR 250.504 - Hydrogen <span class="hlt">sulfide</span>.</span></a></p> <p><a target="_blank" href="http://www.gpo.gov/fdsys/browse/collectionCfr.action?selectedYearFrom=2010&page.go=Go">Code of Federal Regulations, 2010 CFR</a></p> <p></p> <p>2010-07-01</p> <p>... 30 Mineral Resources 2 2010-07-01 2010-07-01 false Hydrogen <span class="hlt">sulfide</span>. 250.504 Section 250.504... OPERATIONS IN THE OUTER CONTINENTAL SHELF Oil and Gas Well-Completion Operations § 250.504 Hydrogen <span class="hlt">sulfide</span>. When a well-completion operation is conducted in zones known to contain hydrogen <span class="hlt">sulfide</span> (H2S) or in...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.gpo.gov/fdsys/pkg/CFR-2010-title30-vol2/pdf/CFR-2010-title30-vol2-sec250-604.pdf','CFR'); return false;" href="https://www.gpo.gov/fdsys/pkg/CFR-2010-title30-vol2/pdf/CFR-2010-title30-vol2-sec250-604.pdf"><span>30 CFR 250.604 - Hydrogen <span class="hlt">sulfide</span>.</span></a></p> <p><a target="_blank" href="http://www.gpo.gov/fdsys/browse/collectionCfr.action?selectedYearFrom=2010&page.go=Go">Code of Federal Regulations, 2010 CFR</a></p> <p></p> <p>2010-07-01</p> <p>... 30 Mineral Resources 2 2010-07-01 2010-07-01 false Hydrogen <span class="hlt">sulfide</span>. 250.604 Section 250.604... OPERATIONS IN THE OUTER CONTINENTAL SHELF Oil and Gas Well-Workover Operations § 250.604 Hydrogen <span class="hlt">sulfide</span>. When a well-workover operation is conducted in zones known to contain hydrogen <span class="hlt">sulfide</span> (H2S) or in...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/biblio/6484871-genesis-base-metal-sulfide-deposits-alabama-piedmont-final-report-somed-school-mines-energy-development-project-year','SCIGOV-STC'); return false;" href="https://www.osti.gov/biblio/6484871-genesis-base-metal-sulfide-deposits-alabama-piedmont-final-report-somed-school-mines-energy-development-project-year"><span>Genesis of <span class="hlt">base-metal</span> <span class="hlt">sulfide</span> deposits, Alabama Piedmont: Final report for the 1985-1986 SOMED (School of Mines and Energy Development) project year</span></a></p> <p><a target="_blank" href="http://www.osti.gov/search">DOE Office of Scientific and Technical Information (OSTI.GOV)</a></p> <p>Lesher, C.M.</p> <p>1987-03-18</p> <p>The best characterized massive <span class="hlt">sulfide</span> deposit in the Northern Alabama Piedmont is the Stone Hill deposit, one of several small Fe-Cu-Zn deposits and prospects associated with metasedimentary and metavolcanic rocks of the Ashland Supergroup. The Fe-Cu-Zn <span class="hlt">sulfide</span> mineralization in the Stone Hill district is hosted by thin felsic schist horizons within the Ketchepedrakee amphibolite, along the contact between metasediments of the Mad Indian and Poe Bridge Mountain Groups. Associated lithologies include garnetites, tremolite-chlorite rocks, and oxide facies iron-formations. The mineralized felsic schists and garnetites are of very limited stratigraphic extent, generally occur within the interpreted upper part of the amphibolite,more » and normally exhibit gradational contacts with enclosing amphibolites. The mineralized felsic schists contain enigmatic grains and polycrystalline aggregates of quartz +- feldspar +- amphibole +- mica that probably represent boudinaged quartz-feldspar segregations, but it is impossible to completely preclude an origin as recrystallized clastic sedimentary particles, recrystallized and deformed igneous phenocrysts, or cataclastic particles. Multivariate statistical analyses and mass balance calculations suggest that the mineralized felsic schists and garnetites are hydrothermally-altered, metamorphosed equivalents of the amphibolites, consistent with the field relationships. Interpretation of the Ketchepedrakee amphibolite as an ocean floor basalt, the mineralized felsic schists and garnetites as hydrothermally-altered variants, and the enclosing graphitic and garnetiferous schists as flysch-type sediments suggests that the rocks of the Stone Hill district were deposited along a rifted continental margin. The close association of mineralization and hydrothermal alteration indicates that a proximal volcanogenic model is most appropriate for the massive <span class="hlt">sulfide</span> deposits in this area.« less</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/19770020242','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/19770020242"><span>Influence of temperature and the role of chromium on the kinetics of <span class="hlt">sulfidation</span> of 310 stainless steel</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Rao, D. B.; Nelson, H. G.</p> <p>1977-01-01</p> <p>The <span class="hlt">sulfidation</span> of 310 stainless steel was studied over the temperature range from 910 K to 1285 K. By adjusting the ratio of hydrogen <span class="hlt">sulfide</span>, variations in sulfur potential were obtained. The effect of temperature on <span class="hlt">sulfidation</span> was determined at three different sulfur potentials: 39/sqNm, 0.014/sqNm, and 0.00015/sqNm. All <span class="hlt">sulfide</span> scales contained one or two surface layers in addition to a subscale. The second outer layer (OL-II), furthest from the alloy, contained primarily Fe-Ni-S. The first outer layer (OL-I), nearest the subscale, contained FE-Cr-S. The subscale consisted of <span class="hlt">sulfide</span> inclusions in the <span class="hlt">metal</span> matrix. At a given temperature and sulfur potential, the weight gain data obeyed the parabolic rate law after an initial transient period. The parabolic rate constants obtained at the sulfur potential of 39/sqNm did not show a break when the logarithm of the rate constant was plotted as a function of the inverse of absolute temperature. <span class="hlt">Sulfidation</span> carried out at sulfur potentials below 0.02/sqNm, however, did show a break at 1145 K, which is termed as the transition temperature. This break was found to be associated with the changes which had occurred in the Fe:Cr ratio of OL-I. Below the transition temperature the activation energy was found to be approximately 125 kj/mole. Above the transition temperature the rate of <span class="hlt">sulfidation</span> decreased with temperature but dependent on the Fe:Cr ratio in the iron-chromium-<span class="hlt">sulfide</span> layers of the OL-I. A reaction mechanism consistent with the experimental results has been proposed.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/25752051','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/25752051"><span>[Ultraviolet-visible spectrometry analysis of insoluble xanthate heavy <span class="hlt">metal</span> complexes].</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Qiu, Bo; Liu, Jin-Feng; Liu, Yao-Chi; Yang, Zhao-Guang; Li, Hai-Pu</p> <p>2014-11-01</p> <p>A ultraviolet-visible spectrometry method of determining insoluble xanthate heavy <span class="hlt">metal</span> complexes in flotation wastewater was the first time to be put forward. In this work, the changes of ultraviolet-visible spectra of xanthate solution after the addition of various heavy <span class="hlt">metal</span> ions were investigated firstly. It was found that Pb2+ and Cu2+ can form insoluble complexes with xanthate, while Fe2+, Zn2+ and Mn2+ have little effect on the ultraviolet absorption of xanthate solution. Then the removal efficiencies of filter membrane with different pore sizes were compared, and the 0.22 μm membrane was found to be effective to separate copper xanthate or lead xanthate from the filtrate. Furthermore, the results of the study on the reaction of sodium <span class="hlt">sulfide</span> and insoluble xanthate heavy <span class="hlt">metal</span> complexes showed that S(2-) can release the xanthate ion quantitatively from insoluble complexes to solution. <span class="hlt">Based</span> on the above research, it was concluded that the amount of insoluble xanthate heavy <span class="hlt">metal</span> complexes in water samples can be obtained through the increase of free xanthate in the filtrate after the addition of sodium <span class="hlt">sulfide</span>. Finally, the feasibility of this method was verified by the application to the analysis of flotation wastewater from three ore-dressing plants in the Thirty-six Coves in Chenzhou.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/20160009351','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/20160009351"><span>Noble <span class="hlt">Metal</span> Arsenides and Gold Inclusions in Northwest Africa 8186</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Srinivasan, P.; McCubbin, F. M.; Rahman, Z.; Keller, L. P.; Agee, C. B.</p> <p>2016-01-01</p> <p>CK carbonaceous chondrites are a highly thermally altered group of carbonaceous chondrites, experiencing temperatures ranging between approximately 576-867 degrees Centigrade. Additionally, the mineralogy of the CK chondrites record the highest overall oxygen fugacity of all chondrites, above the fayalite-magnetite-quartz (FMQ) buffer. <span class="hlt">Me-tallic</span> Fe-Ni is extremely rare in CK chondrites, but magnetite and Fe,Ni <span class="hlt">sulfides</span> are commonly observed. Noble <span class="hlt">metal</span>-rich inclusions have previously been found in some magnetite and <span class="hlt">sulfide</span> grains. These arsenides, tellurides, and <span class="hlt">sulfides</span>, which contain varying amounts of Pt, Ru, Os, Te, As, Ir, and S, are thought to form either by condensation from a solar gas, or by exsolution during metamorphism on the chondritic parent body. Northwest Africa (NWA) 8186 is a highly metamorphosed CK chondrite. This meteorite is predominately composed of NiO-rich forsteritic olivine (Fo65), with lesser amounts of plagioclase (An52), augite (Fs11Wo49), magnetite (with exsolved titanomagnetite, hercynite, and titanohematite), monosulfide solid solution (with exsolved pentlandite), and the phosphate minerals Cl-apatite and merrillite. This meteorite contains coarse-grained, homogeneous silicates, and has 120-degree triple junctions between mineral phases, which indicates a high degree of thermal metamorphism. The presence of NiO-rich olivine, oxides phases all bearing Fe3 plus, and the absence of <span class="hlt">metal</span>, are consistent with an oxygen fugacity above the FMQ buffer. We also observed noble <span class="hlt">metal</span>-rich phases within <span class="hlt">sulfide</span> grains in NWA 8186, which are the primary focus of the present study.</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_21");'>21</a></li> <li><a href="#" onclick='return showDiv("page_22");'>22</a></li> <li><a href="#" onclick='return showDiv("page_23");'>23</a></li> <li class="active"><span>24</span></li> <li><a href="#" onclick='return showDiv("page_25");'>25</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_24 --> <div id="page_25" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_21");'>21</a></li> <li><a href="#" onclick='return showDiv("page_22");'>22</a></li> <li><a href="#" onclick='return showDiv("page_23");'>23</a></li> <li><a href="#" onclick='return showDiv("page_24");'>24</a></li> <li class="active"><span>25</span></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="481"> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/20160007867','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/20160007867"><span>Noble <span class="hlt">Metal</span> Arsenides and Gold Inclusions in Northwest Africa 8186</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Srinivasan, P.; McCubbin, F. M.; Rahman, Z.; Keller, L. P.; Agee, C. B.</p> <p>2016-01-01</p> <p>CK carbonaceous chondrites are a highly thermally altered group of carbonaceous chondrites, experiencing temperatures ranging between approx.576-867 C. Additionally, the mineralogy of the CK chondrites record the highest overall oxygen fugacity of all chondrites, above the fayalite-magnetite-quartz (FMQ) buffer. <span class="hlt">Metallic</span> Fe-Ni is extremely rare in CK chondrites, but magnetite and Fe,Ni <span class="hlt">sulfides</span> are commonly observed. Noble <span class="hlt">metal</span>-rich inclusions have previously been found in some magnetite and <span class="hlt">sulfide</span> grains. These arsenides, tellurides, and <span class="hlt">sulfides</span>, which contain varying amounts of Pt, Ru, Os, Te, As, Ir, and S, are thought to form either by condensation from a solar gas, or by exsolution during metamorphism on the chondritic parent body. Northwest Africa (NWA) 8186 is a highly metamorphosed CK chondrite. This meteorite is predominately composed of NiO-rich forsteritic olivine (Fo65), with lesser amounts of plagioclase (An52), augite (Fs11Wo49), magnetite (with exsolved titanomagnetite, hercynite, and titanohematite), monosulfide solid solution (with exsolved pentlandite), and the phosphate minerals Cl-apatite and merrillite. This meteorite contains coarse-grained, homogeneous silicates, and has 120deg triple junctions between mineral phases, which indicates a high degree of thermal metamorphism. The presence of NiO-rich olivine, oxides phases all bearing Fe3+, and the absence of <span class="hlt">metal</span>, are consistent with an oxygen fugacity above the FMQ buffer. We also observed noble <span class="hlt">metal</span>-rich phases within <span class="hlt">sulfide</span> grains in NWA 8186, which are the primary focus of the present study.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://ntrs.nasa.gov/search.jsp?R=20000121326&hterms=Diversification&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D30%26Ntt%3DDiversification','NASA-TRS'); return false;" href="https://ntrs.nasa.gov/search.jsp?R=20000121326&hterms=Diversification&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D30%26Ntt%3DDiversification"><span>The Evolution of <span class="hlt">Sulfide</span> Tolerance in the Cyanobacteria</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Miller, Scott R.; Bebout, Brad M.; DeVincenzi, Donald L. (Technical Monitor)</p> <p>2000-01-01</p> <p>Understanding how the function of extant microorganisms has recorded both their evolutionary histories and their past interactions with the environment is a stated goal of astrobiology. We are taking a multidisciplinary approach to investigate the diversification of <span class="hlt">sulfide</span> tolerance mechanisms in the cyanobacteria, which vary both in their degree of exposure to <span class="hlt">sulfide</span> and in their capacity to tolerate this inhibitor of photosynthetic electron transport. Since conditions were very reducing during the first part of Earth's history and detrital <span class="hlt">sulfides</span> have been found in Archean sediments, mechanisms conferring <span class="hlt">sulfide</span> tolerance may have been important for the evolutionary success of the ancestors of extant cyanobacteria. Two tolerance mechanisms have been identified in this group: (1) resistance of photosystem II, the principal target of <span class="hlt">sulfide</span> toxicity; and (2) maintenance of the ability to fix carbon despite photosystem II inhibition by utilizing <span class="hlt">sulfide</span> as an electron donor in photosystem I - dependent, anoxygenic photosynthesis. We are presently collecting comparative data on aspects of <span class="hlt">sulfide</span> physiology for laboratory clones isolated from a variety of habitats. These data will be analyzed within a phylogenetic framework inferred from molecular sequence data collected for these clones to test how frequently different mechanisms of tolerance have evolved and which tolerance mechanism evolved first. In addition, by analyzing these physiological data together with environmental <span class="hlt">sulfide</span> data collected from our research sites using microelectrodes, we can also test whether the breadth of an organism's <span class="hlt">sulfide</span> tolerance can be predicted from the magnitude of variation in environmental <span class="hlt">sulfide</span> concentration it has experienced in its recent evolutionary past and whether greater average <span class="hlt">sulfide</span> concentration and/or temporal variability in <span class="hlt">sulfide</span> favors the evolution of a particular mechanism of <span class="hlt">sulfide</span> tolerance.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.gpo.gov/fdsys/pkg/CFR-2010-title30-vol2/pdf/CFR-2010-title30-vol2-sec250-808.pdf','CFR'); return false;" href="https://www.gpo.gov/fdsys/pkg/CFR-2010-title30-vol2/pdf/CFR-2010-title30-vol2-sec250-808.pdf"><span>30 CFR 250.808 - Hydrogen <span class="hlt">sulfide</span>.</span></a></p> <p><a target="_blank" href="http://www.gpo.gov/fdsys/browse/collectionCfr.action?selectedYearFrom=2010&page.go=Go">Code of Federal Regulations, 2010 CFR</a></p> <p></p> <p>2010-07-01</p> <p>... 30 Mineral Resources 2 2010-07-01 2010-07-01 false Hydrogen <span class="hlt">sulfide</span>. 250.808 Section 250.808... OPERATIONS IN THE OUTER CONTINENTAL SHELF Oil and Gas Production Safety Systems § 250.808 Hydrogen <span class="hlt">sulfide</span>. Production operations in zones known to contain hydrogen <span class="hlt">sulfide</span> (H2S) or in zones where the presence of H2S...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.gpo.gov/fdsys/pkg/CFR-2011-title30-vol2/pdf/CFR-2011-title30-vol2-sec250-504.pdf','CFR2011'); return false;" href="https://www.gpo.gov/fdsys/pkg/CFR-2011-title30-vol2/pdf/CFR-2011-title30-vol2-sec250-504.pdf"><span>30 CFR 250.504 - Hydrogen <span class="hlt">sulfide</span>.</span></a></p> <p><a target="_blank" href="http://www.gpo.gov/fdsys/browse/collectionCfr.action?selectedYearFrom=2011&page.go=Go">Code of Federal Regulations, 2011 CFR</a></p> <p></p> <p>2011-07-01</p> <p>... 30 Mineral Resources 2 2011-07-01 2011-07-01 false Hydrogen <span class="hlt">sulfide</span>. 250.504 Section 250.504...-Completion Operations § 250.504 Hydrogen <span class="hlt">sulfide</span>. When a well-completion operation is conducted in zones known to contain hydrogen <span class="hlt">sulfide</span> (H2S) or in zones where the presence of H2S is unknown (as defined in...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.gpo.gov/fdsys/pkg/CFR-2011-title30-vol2/pdf/CFR-2011-title30-vol2-sec250-604.pdf','CFR2011'); return false;" href="https://www.gpo.gov/fdsys/pkg/CFR-2011-title30-vol2/pdf/CFR-2011-title30-vol2-sec250-604.pdf"><span>30 CFR 250.604 - Hydrogen <span class="hlt">sulfide</span>.</span></a></p> <p><a target="_blank" href="http://www.gpo.gov/fdsys/browse/collectionCfr.action?selectedYearFrom=2011&page.go=Go">Code of Federal Regulations, 2011 CFR</a></p> <p></p> <p>2011-07-01</p> <p>... 30 Mineral Resources 2 2011-07-01 2011-07-01 false Hydrogen <span class="hlt">sulfide</span>. 250.604 Section 250.604...-Workover Operations § 250.604 Hydrogen <span class="hlt">sulfide</span>. When a well-workover operation is conducted in zones known to contain hydrogen <span class="hlt">sulfide</span> (H2S) or in zones where the presence of H2S is unknown (as defined in...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://pubs.usgs.gov/bul/b2064-kk/','USGSPUBS'); return false;" href="https://pubs.usgs.gov/bul/b2064-kk/"><span>Geology of an Ordovician stratiform <span class="hlt">base-metal</span> deposit in the Long Canyon Area, Blaine County, Idaho</span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Otto, B.R.; Zieg, G.A.</p> <p>2003-01-01</p> <p>In the Long Canyon area, Blaine County, Idaho, a strati-form <span class="hlt">base-metal</span>-bearing gossan is exposed within a complexly folded and faulted sequence of Ordovician strata. The gossan horizon in graptolitic mudrock suggests preservation of bedded <span class="hlt">sulfides</span> that were deposited by an Ordovician subaqueous hydrothermal system. Abrupt thickness changes and geochemi-cal zoning in the <span class="hlt">metal</span>-bearing strata suggest that the gossan is near the source of the hydrothermal system. Ordovician sedimentary rocks at Long Canyon represent a coarsening-upward section that was deposited below wave <span class="hlt">base</span> in a submarine depositional environment. The lowest exposed rocks represent deposition in a starved, euxinic basin and over-lying strata represent a prograding clastic wedge of terrigenous and calcareous detritus. The metalliferous strata are between these two types of strata. Strata at Long Canyon have been deformed by two periods of thrust faulting, at least three periods of normal faulting, and two periods of folding. Tertiary extensional faulting formed five subhorizontal structural plates. These low-angle fault-bounded plates truncate Sevier-age and possibly Antler-age thrust faults. The presence of gossan-bearing strata in the four upper plates suggests that there was only minor, although locally complex, stratigraphic displacement and rotation. The lack of correlative strata in the lowest plate suggests the displacement was greater than 2000 ft. The metalliferous strata were exposed to surface weathering, oxidation, and erosion prior to and during deposition of the Eocene Challis Volcanic Group. The orientations of erosional canyons formed during this early period of exposure were related to the orientations of Sevier-age thrust faults, and stream-channel gravel was deposited in the canyons. During this and subsequent intervals of exposure, <span class="hlt">sulfidic</span> strata were oxi-dized to a minimum depth of 700 ft.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/20630453','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/20630453"><span>Drug-eluting versus bare-<span class="hlt">metal</span> stents in unprotected left main coronary artery stenosis a meta-analysis.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Pandya, Sanjay B; Kim, Young-Hak; Meyers, Sheridan N; Davidson, Charles J; Flaherty, James D; Park, Duk-Woo; Mediratta, Anuj; Pieper, Karen; Reyes, Eric; Bonow, Robert O; Park, Seung-Jung; Beohar, Nirat</p> <p>2010-06-01</p> <p>We undertook a meta-analysis to assess outcomes for drug-eluting stents (DES) and bare-<span class="hlt">metal</span> stents (<span class="hlt">BMS</span>) in percutaneous coronary intervention for unprotected left main coronary artery (ULMCA) stenosis. Uncertainty exists regarding the relative performance of DES versus <span class="hlt">BMS</span> in percutaneous coronary intervention for unprotected left main coronary stenosis. Of a total of 838 studies, 44 met inclusion criteria (n = 10,342). The co-primary end points were mortality, myocardial infarction (MI), target vessel/lesion revascularization (TVR/TLR), and major adverse cardiac events (MACE: mortality, MI, TVR/TLR). Event rates for DES and <span class="hlt">BMS</span> were calculated at 6 to 12 months, at 2 years, and at 3 years. Crude event rates at 3 years were mortality (8.8% and 12.7%), MI (4.0% and 3.4%), TVR/TLR (8.0% and 16.4%), and MACE (21.4% and 31.6%). Nine studies were included in a comparative analysis (n = 5,081). At 6 to 12 months the adjusted odds ratio (OR) for DES versus <span class="hlt">BMS</span> were: mortality 0.94 (95% confidence interval [CI]: 0.06 to 15.48; p = 0.97), MI 0.64 (95% CI: 0.19 to 2.17; p = 0.47), TVR/TLR 0.10 (95% CI: 0.01 to 0.84; p = 0.01), and MACE 0.34 (95% CI: 0.15 to 0.78; p = 0.01). At 2 years, the OR for DES versus <span class="hlt">BMS</span> were: mortality 0.42 (95% CI: 0.28 to 0.62; p < 0.01), MI 0.16 (95% CI: 0.01 to 3.53; p = 0.13), and MACE 0.31 (95% CI: 0.15 to 0.66; p < 0.01). At 3 years, the OR for DES versus <span class="hlt">BMS</span> were: mortality 0.70 (95% CI: 0.53 to 0.92; p = 0.01), MI 0.49 (95% CI: 0.26 to 0.92; p = 0.03), TVR/TLR 0.46 (95% CI: 0.30 to 0.69; p < 0.01), and MACE 0.78 (95% CI: 0.57 to 1.07; p = 0.12). Our meta-analysis suggests that DES is associated with favorable outcomes for mortality, MI, TVR/TLR, and MACE as compared to <span class="hlt">BMS</span> in percutaneous coronary intervention for unprotected left main coronary artery stenosis. Copyright 2010 American College of Cardiology Foundation. Published by Elsevier Inc. All rights reserved.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/20180002576','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/20180002576"><span><span class="hlt">Sulfidization</span> Contemporaneous with Oxidation and Metamorphism in CK6 Chondrites</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>McCoy, T. J.; Corrigan, C. M.; Davidson, J.; Schrader, D. L.; Righter, K.</p> <p>2018-01-01</p> <p>As the most oxidized chondrites and a group of carbonaceous chondrites spanning the range of petrologic types, CK chondrites occupy an extreme in our understanding of the origin and evolution of chondritic parent bodies. With the proposed linkage of CV and CK chondrites and the suggestion that differentiation of a postulated CV-CK asteroid could have differentiated to form a core and established a magnetic dynamo, CK chondrites are receiving considerable attention. Most of this attention has focused on the similarities between CK3 and CV3 chondrites and the origin of each. We have previously argued that melting of an oxidized core could produce a magnetite-<span class="hlt">sulfide</span> core, rather than the more conventional <span class="hlt">metal-sulfide</span> core. In this work, we focus on CK6 chondrites to understand the origin of the most highly metamorphosed members of the group as representative of the material that might differentiate to form such an oxidized core.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://ntrs.nasa.gov/search.jsp?R=19870030723&hterms=molten+salt+corrosion&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D40%26Ntt%3Dmolten%2Bsalt%2Bcorrosion','NASA-TRS'); return false;" href="https://ntrs.nasa.gov/search.jsp?R=19870030723&hterms=molten+salt+corrosion&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D40%26Ntt%3Dmolten%2Bsalt%2Bcorrosion"><span>Corrosion of <span class="hlt">metals</span> and alloys in sulfate melts at 750 C</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Misra, A. K.</p> <p>1986-01-01</p> <p>The corrosion of Ni, Co, Ni-10Cr, Co-21Cr, and IN738 was studied at 750 C in the presence of molten sulfate mixtures (Na2SO4-Li2SO4 and Na2SO4-CoSO4) and in an atmosphere consisting of O2 + 0.12 percent SO2-SO3. The corrosion was observed to be similar for both Na2SO4-Li2SO4 and Na2SO4-CoSO4 melts. The corrosion of Ni and Co took place by the formation of a mixed oxide plus <span class="hlt">sulfide</span> scale, very similar to the corrosion in SO2 or SO3 alone. The initial stage for the corrosion of Ni-10Cr involved the formation of a thick NiO + Ni3S2 duplex scale, and Cr <span class="hlt">sulfide</span> was formed during the later stages. A pitting type of morphology was observed for both Co-21Cr and IN738. The pit was Cr <span class="hlt">sulfide</span> at the beginning, and subsequently the <span class="hlt">sulfides</span> oxidized to Cr2O3. A <span class="hlt">base-metal</span> oxide layer was present above the pit, and this was observed to be formed very early in the corrosion process. A mechanism is proposed to explain this. In general, the formation of <span class="hlt">sulfides</span> appears to be the primary mode of degradation in mixed <span class="hlt">sulfide</span> melts.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/29943576','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/29943576"><span>Phase Stability and Electronic Structure of Prospective Sb-<span class="hlt">Based</span> Mixed <span class="hlt">Sulfide</span> and Iodide 3D Perovskite (CH3NH3)SbSI2.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Li, Tianyang; Wang, Xiaoming; Yan, Yanfa; Mitzi, David B</p> <p>2018-06-29</p> <p>Lead-free antimony-<span class="hlt">based</span> mixed <span class="hlt">sulfide</span> and iodide perovskite phases have recently been reported to be synthesized experimentally and to exhibit reasonable photovoltaic performance. Through a combination of experimental validation and computational analysis, we show no evidence of the formation of the mixed <span class="hlt">sulfide</span> and iodide perovskite phase, MASbSI 2 (MA = CH 3 NH 3 + ), and instead that the main products are a mixture of the binary and ternary compounds (Sb 2 S 3 and MA 3 Sb 2 I 9 ). Density functional theory calculations also indicate that such a mixed <span class="hlt">sulfide</span> and iodide perovskite phase should be thermodynamically less stable compared with binary/ternary anion-segregated secondary phases and less likely to be synthesized under equilibrium conditions. Additionally, band structure calculations show that this mixed <span class="hlt">sulfide</span> and iodide phase, if possible to synthesize (e.g., under nonequilibrium conditions), should have a suitable direct band gap for photovoltaic application.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2017Icar..296..257B','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2017Icar..296..257B"><span>Numerical modelling of erosion and assimilation of sulfur-rich substrate by martian lava flows: Implications for the genesis of massive <span class="hlt">sulfide</span> mineralization on Mars</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Baumgartner, Raphael J.; Baratoux, David; Gaillard, Fabrice; Fiorentini, Marco L.</p> <p>2017-11-01</p> <p>Mantle-derived volcanic rocks on Mars display physical and chemical commonalities with mafic-ultramafic ferropicrite and komatiite volcanism on the Earth. Terrestrial komatiites are common hosts of massive <span class="hlt">sulfide</span> mineralization enriched in siderophile-chalcophile precious <span class="hlt">metals</span> (i.e., Ni, Cu, and the platinum-group elements). These deposits correspond to the batch segregation and accumulation of immiscible <span class="hlt">sulfide</span> liquids as a consequence of mechanical/thermo-mechanical erosion and assimilation of sulfur-rich bedrock during the turbulent flow of high-temperature and low-viscosity komatiite lava flows. This study adopts this mineralization model and presents numerical simulations of erosion and assimilation of <span class="hlt">sulfide</span>- and sulfate-rich sedimentary substrates during the dynamic emplacement of (channelled) mafic-ultramafic lava flows on Mars. For sedimentary substrates containing adequate <span class="hlt">sulfide</span> proportions (e.g., 1 wt% S), our simulations suggest that <span class="hlt">sulfide</span> supersaturation in low-temperature (< 1350 °C) flows could be attained at < 200 km distance, but may be postponed in high-temperature lavas flows (> 1400 °C). The precious-<span class="hlt">metals</span> tenor in the derived immiscible <span class="hlt">sulfide</span> liquids may be significantly upgraded as a result of their prolonged equilibration with large volumes of silicate melts along flow conduits. The influence of sulfate assimilation on <span class="hlt">sulfide</span> supersaturation in martian lava flows is addressed by simulations of melt-gas equilibration in the Csbnd Hsbnd Osbnd S fluid system. However, prolonged <span class="hlt">sulfide</span> segregation and deposit genesis by means of sulfate assimilation appears to be limited by lava oxidation and the release of sulfur-rich gas. The identification of massive <span class="hlt">sulfide</span> endowments on Mars is not possible from remote sensing data. Yet the results of this study aid to define regions for the potential occurrence of such mineral systems, which may be the large canyon systems Noctis Labyrinthus and Valles Marineris, or the Hesperian channel</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/26412262','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/26412262"><span>Accumulation of trace <span class="hlt">metals</span> in sediments in a Mediterranean Lagoon: Usefulness of <span class="hlt">metal</span> sediment fractionation and elutriate toxicity assessment.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Zaaboub, Noureddine; Martins, Maria Virgínia Alves; Dhib, Amel; Béjaoui, Béchir; Galgani, François; El Bour, Monia; Aleya, Lotfi</p> <p>2015-12-01</p> <p>The authors investigated sediment quality in Bizerte Lagoon (Tunisia) focusing on geochemical characteristics, <span class="hlt">metal</span> sediment fractionation and elutriate toxicity assessment. Nickel, Cu, Zn, Pb, Cr and Cd partitioning in sediments was studied; accumulation and bioavailability were elucidated using enrichment factors, sequential extractions, redox potential, acid volatile <span class="hlt">sulfide</span> and biotest procedures in toxicity evaluation. Results revealed an accumulation for Pb and Zn, reaching 99 and 460 mg kg(-1) respectively. In addition, the acid volatile <span class="hlt">sulfide</span> values were high in both eastern and western lagoon areas, thus affecting <span class="hlt">metal</span> availability. Mean enrichment factor values for Pb and Zn were 4.8 and 4.9, respectively, with these elements as the main contributors to the lagoon's moderate enrichment level. Toxicity levels were influenced by accumulation of Zn in different surface sediment areas. Core sediments were investigated in areas with the highest <span class="hlt">metal</span> concentrations; <span class="hlt">metal</span> fractionation and biotest confirmed that Zn contributes to sediment toxicity. Copyright © 2015 Elsevier Ltd. All rights reserved.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=128916&keyword=programming&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50','EPA-EIMS'); return false;" href="https://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=128916&keyword=programming&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50"><span>NEAR-CONTINUOUS MEASUREMENT OF HYDROGEN <span class="hlt">SULFIDE</span> AND CARBONYL <span class="hlt">SULFIDE</span> BY AN AUTOMATIC GAS CHROMATOGRAPH</span></a></p> <p><a target="_blank" href="http://oaspub.epa.gov/eims/query.page">EPA Science Inventory</a></p> <p></p> <p></p> <p>An automatic gas chromatograph with a flame photometric detector that samples and analyzes hydrogen <span class="hlt">sulfide</span> and carbonyl <span class="hlt">sulfide</span> at 30-s intervals is described. Temperature programming was used to elute trace amounts of carbon disulfide present in each injection from a Supelpak-S...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.dtic.mil/docs/citations/ADA501657','DTIC-ST'); return false;" href="http://www.dtic.mil/docs/citations/ADA501657"><span>Liquid <span class="hlt">Metal</span> Anode for JP-8 Fuel Cell</span></a></p> <p><a target="_blank" href="http://www.dtic.mil/">DTIC Science & Technology</a></p> <p></p> <p>2009-01-15</p> <p><span class="hlt">bases</span>. They react preferentially with acidic sulfur and its compounds, S, SO2 and H2S. These reactions of cerium oxides with sulfur and its...by sulfur . The dominating thermodynamic reaction is the formation of <span class="hlt">metal</span> <span class="hlt">sulfides</span> or sulfates , not the desired electrochemical reduction...oxidation of sulfur to make sulfuric acid . Vanadium carbide used as a fuel cell anode has been evaluated by Japanese researchers and CellTech Power. Its</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/27326328','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/27326328"><span>Discovery of <span class="hlt">BMS</span>-955176, a Second Generation HIV-1 Maturation Inhibitor with Broad Spectrum Antiviral Activity.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Regueiro-Ren, Alicia; Liu, Zheng; Chen, Yan; Sin, Ny; Sit, Sing-Yuen; Swidorski, Jacob J; Chen, Jie; Venables, Brian L; Zhu, Juliang; Nowicka-Sans, Beata; Protack, Tricia; Lin, Zeyu; Terry, Brian; Samanta, Himadri; Zhang, Sharon; Li, Zhufang; Beno, Brett R; Huang, Xiaohua S; Rahematpura, Sandhya; Parker, Dawn D; Haskell, Roy; Jenkins, Susan; Santone, Kenneth S; Cockett, Mark I; Krystal, Mark; Meanwell, Nicholas A; Hanumegowda, Umesh; Dicker, Ira B</p> <p>2016-06-09</p> <p>HIV-1 maturation inhibition (MI) has been clinically validated as an approach to the control of HIV-1 infection. However, identifying an MI with both broad polymorphic spectrum coverage and good oral exposure has been challenging. Herein, we describe the design, synthesis, and preclinical characterization of a potent, orally active, second generation HIV-1 MI, <span class="hlt">BMS</span>-955176 (2), which is currently in Phase IIb clinical trials as part of a combination antiretroviral regimen.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/19760024244','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/19760024244"><span><span class="hlt">Sulfidation</span> of 310 stainless steel at sulfur potentials encountered in coal conversion systems</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Rao, D. B.; Nelson, H. G.</p> <p>1976-01-01</p> <p>The <span class="hlt">sulfidation</span> of SAE 310 stainless steel was carried out in gas mixtures of hydrogen and hydrogen <span class="hlt">sulfide</span> over a range of sulfur potentials anticipated in advanced coal gasification processes. The kinetics, composition, and morphology of <span class="hlt">sulfide</span> scale formation were studied at a fixed temperature of 1,065 K over a range of sulfur potentials from .00015 Nm to the -2nd power to 900 Nm to the -2nd power. At all sulfur potentials investigated, the <span class="hlt">sulfide</span> scales were found to be multilayered. The relative thickness of the individual layers as well as the composition was found to depend on the sulfur potential. The reaction was found to obey the parabolic rate law after an initial transient period. Considerably longer transient periods were found to be due to unsteady state conditions resulting from compositional variations in the spinel layer. The sulfur pressure dependence on the parabolic rate constant was found to best fit the equation K sub p equals const. (P sub S2) to the 1/nth power, where n equals 3.7. The growth of the outer layers was found to be primarily due to the diffusion of <span class="hlt">metal</span> ions, iron being the predominant species. The inner layer growth was due to the dissociation of the primary product at the alloy scale interface and depended on the activity of chromium.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2017JHEP...09..030F','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2017JHEP...09..030F"><span>Asymptotic structure of N=2 supergravity in 3D: extended super-<span class="hlt">BMS</span>3 and nonlinear energy bounds</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Fuentealba, Oscar; Matulich, Javier; Troncoso, Ricardo</p> <p>2017-09-01</p> <p>The asymptotically flat structure of N=(2,0) supergravity in three spacetime dimensions is explored. The asymptotic symmetries are found to be spanned by an extension of the super-<span class="hlt">BMS</span>3 algebra, endowed with two independent affine û(1) currents of electric and magnetic type. These currents are associated to U(1) fields being even and odd under parity, respectively. Remarkably, although the U(1) fields do not generate a backreaction on the metric, they provide nontrivial Sugawara-like contributions to the <span class="hlt">BMS</span>3 generators, and hence to the energy and the angular momentum. Consequently, the entropy of flat cosmological spacetimes endowed with U(1) fields acquires a nontrivial dependence on the zero modes of the û(1) charges. If the spin structure is odd, the ground state corresponds to Minkowski spacetime, and although the anticommutator of the canonical supercharges is linear in the energy and in the electric-like û(1) charge, the energy becomes bounded from below by the energy of the ground state shifted by the square of the electric-like û(1) charge. If the spin structure is even, the same bound for the energy generically holds, unless the absolute value of the electric-like charge is less than minus the mass of Minkowski spacetime in vacuum, so that the energy has to be nonnegative. The explicit form of the global and asymptotic Killing spinors is found for a wide class of configurations that fulfills our boundary conditions, and they exist precisely when the corresponding bounds are saturated. It is also shown that the spectra with periodic or antiperiodic boundary conditions for the fermionic fields are related by spectral flow, in a similar way as it occurs for the N=2 super-Virasoro algebra. Indeed, our supersymmetric extension of <span class="hlt">BMS</span>3 can be recovered from the Inönü-Wigner contraction of the superconformal algebra with N=(2,2) , once the fermionic generators of the right copy are truncated.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.gpo.gov/fdsys/pkg/CFR-2014-title30-vol2/pdf/CFR-2014-title30-vol2-sec250-504.pdf','CFR2014'); return false;" href="https://www.gpo.gov/fdsys/pkg/CFR-2014-title30-vol2/pdf/CFR-2014-title30-vol2-sec250-504.pdf"><span>30 CFR 250.504 - Hydrogen <span class="hlt">sulfide</span>.</span></a></p> <p><a target="_blank" href="http://www.gpo.gov/fdsys/browse/collectionCfr.action?selectedYearFrom=2014&page.go=Go">Code of Federal Regulations, 2014 CFR</a></p> <p></p> <p>2014-07-01</p> <p>... 30 Mineral Resources 2 2014-07-01 2014-07-01 false Hydrogen <span class="hlt">sulfide</span>. 250.504 Section 250.504... § 250.504 Hydrogen <span class="hlt">sulfide</span>. When a well-completion operation is conducted in zones known to contain hydrogen <span class="hlt">sulfide</span> (H2S) or in zones where the presence of H2S is unknown (as defined in § 250.490 of this...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.gpo.gov/fdsys/pkg/CFR-2012-title30-vol2/pdf/CFR-2012-title30-vol2-sec250-604.pdf','CFR2012'); return false;" href="https://www.gpo.gov/fdsys/pkg/CFR-2012-title30-vol2/pdf/CFR-2012-title30-vol2-sec250-604.pdf"><span>30 CFR 250.604 - Hydrogen <span class="hlt">sulfide</span>.</span></a></p> <p><a target="_blank" href="http://www.gpo.gov/fdsys/browse/collectionCfr.action?selectedYearFrom=2012&page.go=Go">Code of Federal Regulations, 2012 CFR</a></p> <p></p> <p>2012-07-01</p> <p>... 30 Mineral Resources 2 2012-07-01 2012-07-01 false Hydrogen <span class="hlt">sulfide</span>. 250.604 Section 250.604... § 250.604 Hydrogen <span class="hlt">sulfide</span>. When a well-workover operation is conducted in zones known to contain hydrogen <span class="hlt">sulfide</span> (H2S) or in zones where the presence of H2S is unknown (as defined in § 250.490 of this...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.gpo.gov/fdsys/pkg/CFR-2012-title30-vol2/pdf/CFR-2012-title30-vol2-sec250-504.pdf','CFR2012'); return false;" href="https://www.gpo.gov/fdsys/pkg/CFR-2012-title30-vol2/pdf/CFR-2012-title30-vol2-sec250-504.pdf"><span>30 CFR 250.504 - Hydrogen <span class="hlt">sulfide</span>.</span></a></p> <p><a target="_blank" href="http://www.gpo.gov/fdsys/browse/collectionCfr.action?selectedYearFrom=2012&page.go=Go">Code of Federal Regulations, 2012 CFR</a></p> <p></p> <p>2012-07-01</p> <p>... 30 Mineral Resources 2 2012-07-01 2012-07-01 false Hydrogen <span class="hlt">sulfide</span>. 250.504 Section 250.504... § 250.504 Hydrogen <span class="hlt">sulfide</span>. When a well-completion operation is conducted in zones known to contain hydrogen <span class="hlt">sulfide</span> (H2S) or in zones where the presence of H2S is unknown (as defined in § 250.490 of this...</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_21");'>21</a></li> <li><a href="#" onclick='return showDiv("page_22");'>22</a></li> <li><a href="#" onclick='return showDiv("page_23");'>23</a></li> <li><a href="#" onclick='return showDiv("page_24");'>24</a></li> <li class="active"><span>25</span></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_25 --> <div class="footer-extlink text-muted" style="margin-bottom:1rem; text-align:center;">Some links on this page may take you to non-federal websites. 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