Sample records for palladium 118 target

  1. Photonuclear reactions on 112,118,124Sn, natTe, and natHf targets

    NASA Astrophysics Data System (ADS)

    Danagulyan, A. S.; Hovhannisyan, G. H.; Bakhshiyan, T. M.; Avagyan, R. H.; Avetisyan, A. E.; Kerobyan, I. A.; Dallakyan, R. K.

    2014-11-01

    The yields of products of photonuclear reactions on tin targets enriched in the isotopes 112,118,124Sn and on Te and HfO2 targets of natural isotopic composition were measured. The targets were irradiated at the linear electron accelerator of the A.I. Alikhanian National Science Laboratory (Yerevan Physics Institute) at the electron energy of E e = 40 MeV. The dependence of the product yields on the nucleonic composition of the targets was discussed. The isomeric ratios were obtained for the 119 m,g Te, 121 m,g Te, 117 m,g In, and 123 m,g Sn products. The experimental data in question were compared with their theoretical counterparts calculated on the basis of the TALYS 1.4 code. The dependence of the isomeric ratios on the photon energy and on the mass number of the product is considered.

  2. The role of the solvent in the ultrashort laser ablation of palladium target in liquid

    NASA Astrophysics Data System (ADS)

    De Bonis, A.; Sansone, M.; Galasso, A.; Santagata, A.; Teghil, R.

    2014-10-01

    In the present study, the pulsed laser ablation in liquid technique was used to produce palladium nanoparticles in acetone and in water. The composition, morphology and oxidation state of the obtained nanoparticles have been characterized by HR-TEM, XPS and XRD techniques. The results evidence that the nature of the solvent influences the physical-chemical properties of the products. In acetone non-aggregate metallic nanoparticles have been obtained, while in water the oxidation of the particles surface is present, as showed by the XPS analysis. Moreover, the particles obtained in water are aggregated and the coalescence effect is evident. The different size distributions of nanoparticles obtained in the two liquids have been interpreted considering the different cavitation bubble dynamics.

  3. Formal total syntheses of classic natural product target molecules via palladium-catalyzed enantioselective alkylation

    PubMed Central

    Liu, Yiyang; Liniger, Marc; McFadden, Ryan M; Roizen, Jenny L; Malette, Jacquie; Reeves, Corey M; Behenna, Douglas C; Seto, Masaki; Kim, Jimin; Mohr, Justin T; Virgil, Scott C

    2014-01-01

    Summary Pd-catalyzed enantioselective alkylation in conjunction with further synthetic elaboration enables the formal total syntheses of a number of “classic” natural product target molecules. This publication highlights recent methods for setting quaternary and tetrasubstituted tertiary carbon stereocenters to address the synthetic hurdles encountered over many decades across multiple compound classes spanning carbohydrate derivatives, terpenes, and alkaloids. These enantioselective methods will impact both academic and industrial settings, where the synthesis of stereogenic quaternary carbons is a continuing challenge. PMID:25383121

  4. The pterocarpanquinone LQB-118 induces apoptosis in acute myeloid leukemia cells of distinct molecular subtypes and targets FoxO3a and FoxM1 transcription factors.

    PubMed

    Nestal de Moraes, Gabriela; Castro, Carolina Pereira; Salustiano, Eduardo Jesus; Dumas, Matheus Lourenço; Costas, Fernanda; Lam, Eric Wing-Fai; Costa, Paulo Roberto Ribeiro; Maia, Raquel Ciuvalschi

    2014-11-01

    Acute myeloid leukemia (AML) patients' outcome is usually poor, mainly because of drug resistance phenotype. The identification of new drugs able to overcome mechanisms of chemoresistance is essential. The pterocarpanquinone LQB-118 compound has been shown to have a potent cytotoxic activity in myeloid leukemia cell lines and patient cells. Our aim was to investigate if LQB-118 is able to target FoxO3a and FoxM1 signaling pathways while sensitizing AML cell lines. LQB-118 induced apoptosis in both AML cell lines HL60 (M3 FAB subtype) and U937 (M4/M5 FAB subtype). Cell death occurred independently of alterations in cell cycle distribution. In vivo administration revealed that LQB-118 was not cytotoxic to normal bone marrow-derived cells isolated from mice. LQB-118 induced FoxO3a nuclear translocation and upregulation of its direct transcriptional target Bim, in HL60 cells. However, LQB-118 induced FoxO3a nuclear exclusion, followed by Bim downregulation, in U937 cells. Concomitantly, LQB-118 exposure reduced FoxM1 and Survivin expression in U937 cells, but this effect was more subtle in HL60 cells. Taken together, our data suggest that LQB-118 has a selective and potent antitumor activity against AML cells with distinct molecular subtypes, and it involves differential modulation of the signaling pathways associated with FoxO3a and FoxM1 transcription factors. PMID:25174716

  5. Palladium contamination in silicon

    NASA Astrophysics Data System (ADS)

    Polignano, M. L.; Mica, I.; Ceresoli, M.; Codegoni, D.; Somaini, F.; Bianchi, I.; Volonghi, D.

    2015-04-01

    In this work palladium is characterized as a silicon contaminant by recombination lifetime, DLTS, C-V and C-t measurements of palladium-implanted wafers. Palladium introduced by ion implantation is found to remain in the solid solution in silicon after rapid thermal treatments, and to be a very effective recombination center. For this reason recombination lifetime measurements are the most sensitive method to detect palladium in silicon. Two palladium-related levels were found by DLTS in p-type material. One of these levels corresponds to a level reported in the literature as the single donor level of substitutional palladium. For what concerns MOS capacitors, palladium is responsible for negative oxide charge and for degradation of the generation lifetime. In addition, palladium is confirmed to be a very fast diffuser, which segregates at the wafer surface even with low temperature treatments (250 °C). Microscopy inspections showed that palladium precipitates and surface defects were formed upon segregation.

  6. Sputter target

    DOEpatents

    Gates, Willard G. (Kansas City, MO); Hale, Gerald J. (Overland Park, KS)

    1980-01-01

    The disclosure relates to an improved sputter target for use in the deposition of hard coatings. An exemplary target is given wherein titanium diboride is brazed to a tantalum backing plate using a gold-palladium-nickel braze alloy.

  7. INNOVATIONS IN PALLADIUM MEMBRANE RESEARCH

    Microsoft Academic Search

    S. N. Paglieri

    2002-01-01

    This review highlights various aspects of current palladium membrane research and serves as a comprehensive bibliography covering palladium membrane preparation methods and applications. There are many promising uses for palladium membranes, although widespread use of the available technologies is constrained primarily by the high cost of palladium, lack of durability due to hydrogen embrittlement, and susceptibility to fouling. Various researchers

  8. Palladium on Plastic Substrates for Plasmonic Devices

    PubMed Central

    Zuppella, Paola; Pasqualotto, Elisabetta; Zuccon, Sara; Gerlin, Francesca; Corso, Alain Jody; Scaramuzza, Matteo; De Toni, Alessandro; Paccagnella, Alessandro; Pelizzo, Maria Guglielmina

    2015-01-01

    Innovative chips based on palladium thin films deposited on plastic substrates have been tested in the Kretschmann surface plasmon resonance (SPR) configuration. The new chips combine the advantages of a plastic support that is interesting and commercially appealing and the physical properties of palladium, showing inverted surface plasmon resonance (ISPR). The detection of DNA chains has been selected as the target of the experiment, since it can be applied to several medical early diagnostic tools, such as different biomarkers of cancers or cystic fibrosis. The results are encouraging for the use of palladium in SPR-based sensors of interest for both the advancement of biodevices and the development of hydrogen sensors. PMID:25585102

  9. Palladium alloys for biomedical devices.

    PubMed

    Wataha, John C; Shor, Kavita

    2010-07-01

    In the biomedical field, palladium has primarily been used as a component of alloys for dental prostheses. However, recent research has shown the utility of palladium alloys for devices such as vascular stents that do not distort magnetic resonance images. Dental palladium alloys may contain minor or major percentages of palladium. As a minor constituent, palladium hardens, strengthens and increases the melting range of alloys. Alloys that contain palladium as the major component also contain copper, gallium and sometimes tin to produce strong alloys with high stiffness and relatively low corrosion rates. All current evidence suggests that palladium alloys are safe, despite fears about harmful effects of low-level corrosion products during biomedical use. Recent evidence suggests that palladium poses fewer biological risks than other elements, such as nickel or silver. Hypersensitivity to palladium alone is rare, but accompanies nickel hypersensitivity 90-100% of the time. The unstable price of palladium continues to influence the use of palladium alloys in biomedicine. PMID:20583886

  10. Final Hazard Categorization for the Remediation of the 118-D-1, 118-D-2, 118-D-3, 118-H-1, 118-H-2 and 118-H-3 Solid Waste Burial Grounds

    SciTech Connect

    K. L. Vialetti

    2008-05-20

    This report presents the final hazard categorization for the remediation of the 118-D-1, 118-D-2, and 118-D-3 Burial Grounds located within the 100-D/DR Area of the Hanford Site and the 118-H-1, 118-H-2, and 118-H-3 Burial Grounds located within the 100-H Area of the Hanford Site.

  11. Final Hazard Categorization for the Remediation of the 118-D-1, 118-D-2, 118-D-3, 118-H-1, 118-H-2, and 118-H-3 Solid Waste Burial Grounds

    SciTech Connect

    T. J. Rodovsky

    2006-12-06

    This report presents the final hazard categorization (FHC) for the remediation of the 118-D-1, 118-D-2, and 118-D-3 Burial Grounds located within the 100-D/DR Area of the Hanford Site and the 118-H-1, 118-H-2, and 118-H-3 Burial Grounds located within the 100-H Area of the Hanford Site.

  12. Final Hazard Categorization for the Remediation of the 118-D-1, 118-D-2, 118-D-3, 118-H-1, 118-H-2, and 118-H-3 Solid Waste Burial Grounds

    SciTech Connect

    T. J. Rodovsky

    2007-04-12

    This report presents the final hazard categorization (FHC) for the remediation of the 118-D-1, 118-D-2, and 118-D-3 Burial Grounds located within the 100-D/DR Area of the Hanford Site and the 118-H-1, 118-H-2, and 118-H-3 Burial Grounds located within the 100-H Area of the Hanford Site.

  13. MONTANA PALLADIUM RESEARCH INITIATIVE

    SciTech Connect

    Peters, John

    2012-05-09

    Project Objective: The overarching objective of the Montana Palladium Research Initiative is to perform scientific research on the properties and uses of palladium in the context of the U.S. Department of Energy'Ã?Â?Ã?Â?Ã?Â?Ã?Â?Ã?Â?Ã?Â?Ã?Â?Ã?Â?s Hydrogen, Fuel Cells and Infrastructure Technologies Program. The purpose of the research will be to explore possible palladium as an alternative to platinum in hydrogen-economy applications. To achieve this objective, the Initiatives activities will focus on several cutting-edge research approaches across a range of disciplines, including metallurgy, biomimetics, instrumentation development, and systems analysis. Background: Platinum-group elements (PGEs) play significant roles in processing hydrogen, an element that shows high potential to address this need in the U.S. and the world for inexpensive, reliable, clean energy. Platinum, however, is a very expensive component of current and planned systems, so less-expensive alternatives that have similar physical properties are being sought. To this end, several tasks have been defined under the rubric of the Montana Palladium Research Iniative. This broad swath of activities will allow progress on several fronts. The membrane-related activities of Task 1 employs state-of-the-art and leading-edge technologies to develop new, ceramic-substrate metallic membranes for the production of high-purity hydrogen, and develop techniques for the production of thin, defect-free platinum group element catalytic membranes for energy production and pollution control. The biomimetic work in Task 2 explores the use of substrate-attached hydrogen-producing enzymes and the encapsulation of palladium in virion-based protein coats to determine their utility for distributed hydrogen production. Task 3 work involves developing laser-induced breakdown spectroscopy (LIBS) as a real-time, in situ diagnostic technique to characterize PGEs nanoparticles for process monitoring and control. The systems engineering work in task 4 will determine how fuel cells Ã?Â?Ã?Â?Ã?Â?Ã?Â?Ã?Â?Ã?Â?Ã?Â?Ã?Â?taken as systems behave over periods of time that should show how their reformers and other subsystems deteriorate with time.

  14. Doped palladium containing oxidation catalysts

    DOEpatents

    Mohajeri, Nahid

    2014-02-18

    A supported oxidation catalyst includes a support having a metal oxide or metal salt, and mixed metal particles thereon. The mixed metal particles include first particles including a palladium compound, and second particles including a precious metal group (PMG) metal or PMG metal compound, wherein the PMG metal is not palladium. The oxidation catalyst may also be used as a gas sensor.

  15. Hydrogen absorption induced metal deposition on palladium and palladium-alloy particles

    DOEpatents

    Wang, Jia X. (East Setauket, NY); Adzic, Radoslav R. (East Setauket, NY)

    2009-03-24

    The present invention relates to methods for producing metal-coated palladium or palladium-alloy particles. The method includes contacting hydrogen-absorbed palladium or palladium-alloy particles with one or more metal salts to produce a sub-monoatomic or monoatomic metal- or metal-alloy coating on the surface of the hydrogen-absorbed palladium or palladium-alloy particles. The invention also relates to methods for producing catalysts and methods for producing electrical energy using the metal-coated palladium or palladium-alloy particles of the present invention.

  16. Final Hazard Categorization and Auditable Safety Analysis for the Remediation of the 118-D-1, 118-D-2, 118-D-3, 118-H-1, 118-H-2 and 118-H-3 Solid Waste Burial Grounds

    SciTech Connect

    T. J. Rodovsky

    2006-03-01

    This report presents the initial hazard categorization, final hazard categorization and auditable safety analysis for the remediation of the 118-D-1, 118-D-2, and 118-D-3 Burial Grounds located within the 100-D/DR Area of the Hanford Site and the 118-H-1, 118-H-2, and 118-H-3 Burial Grounds located within the 100-H Area of the Hanford Site.

  17. Final Hazard Categorization for the Remediation of the 118-D-1, 118-D-2, 118-D-3, 118-H-1, 118-H-2, and 118-H-3 Solid Waste Burial Grounds

    SciTech Connect

    J.D. Ludowise

    2009-06-17

    This report presents the final hazard categorization for the remediation of the 118-D-1, 118-D-2, 118-D-3 Burial Grounds located within the 100-D/DR Area of the Hanford Site and the 118-H-1, 118-H-2, and 118-H-3 Burial Grounds located within the 100-H Area of the Hanford Site. A material at risk calculation was performed that determined the radiological inventory for each burial ground to be Hazard Category 3.

  18. Low-cost method for fabricating palladium and palladium-allow thin films on porous supports

    DOEpatents

    Lee, Tae H; Park, Chan Young; Lu, Yunxiang; Dorris, Stephen E; Balachandran, Uthamalingham

    2013-11-19

    A process for forming a palladium or palladium alloy membrane on a ceramic surface by forming a pre-colloid mixture comprising a powder palladium source, carrier fluid, dispersant and a pore former and a binder. Ultrasonically agitating the precolloid mixture and applying to a substrate with an ultrasonic nozzle and heat curing the coating form a palladium-based membrane.

  19. 46 CFR 118.300 - Fire pumps.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ...Shipping 4 2012-10-01 2012-10-01 false Fire pumps. 118.300 Section 118.300 Shipping...OVERNIGHT ACCOMMODATIONS FOR MORE THAN 49 PASSENGERS FIRE PROTECTION EQUIPMENT Fire Main System § 118.300 Fire pumps....

  20. 46 CFR 118.300 - Fire pumps.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ...Shipping 4 2011-10-01 2011-10-01 false Fire pumps. 118.300 Section 118.300 Shipping...OVERNIGHT ACCOMMODATIONS FOR MORE THAN 49 PASSENGERS FIRE PROTECTION EQUIPMENT Fire Main System § 118.300 Fire pumps....

  1. 46 CFR 118.300 - Fire pumps.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ...Shipping 4 2013-10-01 2013-10-01 false Fire pumps. 118.300 Section 118.300 Shipping...OVERNIGHT ACCOMMODATIONS FOR MORE THAN 49 PASSENGERS FIRE PROTECTION EQUIPMENT Fire Main System § 118.300 Fire pumps....

  2. 46 CFR 118.300 - Fire pumps.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...Shipping 4 2010-10-01 2010-10-01 false Fire pumps. 118.300 Section 118.300 Shipping...OVERNIGHT ACCOMMODATIONS FOR MORE THAN 49 PASSENGERS FIRE PROTECTION EQUIPMENT Fire Main System § 118.300 Fire pumps....

  3. 46 CFR 118.300 - Fire pumps.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ...Shipping 4 2014-10-01 2014-10-01 false Fire pumps. 118.300 Section 118.300 Shipping...OVERNIGHT ACCOMMODATIONS FOR MORE THAN 49 PASSENGERS FIRE PROTECTION EQUIPMENT Fire Main System § 118.300 Fire pumps....

  4. Palladium/kieselguhr composition and method

    DOEpatents

    Mosley, W.C. Jr.

    1993-09-28

    A hydrogen-absorbing composition and method for making such a composition are described. The composition comprises a metal hydride, preferably palladium, deposited onto a porous substrate such as kieselguhr, for use in hydrogen-absorbing processes. The composition is made by immersing a substrate in a concentrated solution containing palladium, such as tetra-amine palladium nitrate. Palladium from the solution is deposited onto the porous substrate, which is preferably in the form of kieselguhr particles. The substrate is then removed from the solution, calcined, and heat treated. This process is repeated until the desired amount of palladium has been deposited onto the substrate.

  5. Palladium/kieselguhr composition and method

    DOEpatents

    Mosley, Jr., Wilbur C. (202 Fairway Dr., New Ellenton, SC 29809)

    1993-01-01

    A hydrogen-absorbing composition and method for making such a composition. The composition comprises a metal hydride, preferably palladium, deposited onto a porous substrate such as kieselguhr, for use in hydrogen-absorbing processes. The composition is made by immersing a substrate in a concentrated solution containing palladium, such as tetra-amine palladium nitrate. Palladium from the solution is deposited onto the porous substrate, which is preferably in the form of kieselguhr particles. The substrate is then removed from the solution, calcined, and heat treated. This process is repeated until the desired amount of palladium has been deposited onto the substrate.

  6. Palladium Catalyzed Reduction of Nitrobenzene.

    ERIC Educational Resources Information Center

    Mangravite, John A.

    1983-01-01

    Compares two palladium (Pd/C) reducing systems to iron/tin-hydrochloric acid (Fe/HCl and Sn/HCl) reductions and suggests an efficient, clean, and inexpensive procedures for the conversion of nitrobenzene to aniline. Includes laboratory procedures used and discussion of typical results obtained. (JN)

  7. Palladium as electrode in DNA sequencing

    NASA Astrophysics Data System (ADS)

    Chen, Xiang

    2013-08-01

    We construct a molecular junction comprising two identical "reader" molecules that are each linked on one end to a DNA single base via hydrogen bonds and on the other end to a palladium electrode. The structure of the junction is thus palladium-reader-base-reader-palladium. The palladium-reader contacts occur via Pd-S bonds. We calculated the electronic structure and conductance of the molecular junctions. Compared with the performance of molecular junctions with gold or titanium nitride electrodes, the current-voltage characteristics of the molecular junctions with palladium electrodes show higher sensitivity to the identity of the bridging DNA base, allowing the DNA bases to be distinguished more easily. Therefore, palladium is a superior electrode for molecular electronics and DNA sequencing.

  8. Ultrafine palladium particles immobilized on polymer microspheres

    Microsoft Academic Search

    P. H. Wang; C.-Y. Pan

    2001-01-01

    Ultrafine palladium particles immobilized on submicrometer copolymer microspheres were prepared by reduction of palladium\\u000a ions in the presence of the copolymer microspheres. Copolymer microspheres with surface carboxylic or cyano functionality\\u000a were used. Transmission electron microscopy observation and X-ray diffraction analysis indicated that ultrafine palladium\\u000a particles of nanometer size were formed and were attached on the surface of the copolymer microspheres.

  9. Mechanochemical preparation of palladium chalcogenides

    Microsoft Academic Search

    T. Ohtani; K. Ikeda; Y. Hayashi; Y. Fukui

    2007-01-01

    Palladium chalcogenides of PdS, Pd17Se15, PdSe2, PdTe, Pd3Te2 and PdSeTe were prepared by milling elemental mixtures, using a planetary-type ball mill at room temperature. These chalcogenides were obtained within 30min. Pd17Se15 was also obtained when the elemental mixture was immersed in methanol or ethanol at room temperature for 10 days.

  10. 45 CFR 400.118 - Case planning.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ...Section 400.118 Public Welfare Regulations Relating to Public Welfare OFFICE OF REFUGEE RESETTLEMENT, ADMINISTRATION FOR CHILDREN AND FAMILIES, DEPARTMENT...REFUGEE RESETTLEMENT PROGRAM Child Welfare Services § 400.118...

  11. 45 CFR 400.118 - Case planning.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ...Section 400.118 Public Welfare Regulations Relating to Public Welfare OFFICE OF REFUGEE RESETTLEMENT, ADMINISTRATION FOR CHILDREN AND FAMILIES, DEPARTMENT...REFUGEE RESETTLEMENT PROGRAM Child Welfare Services § 400.118...

  12. 45 CFR 400.118 - Case planning.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ...Section 400.118 Public Welfare Regulations Relating to Public Welfare OFFICE OF REFUGEE RESETTLEMENT, ADMINISTRATION FOR CHILDREN AND FAMILIES, DEPARTMENT...REFUGEE RESETTLEMENT PROGRAM Child Welfare Services § 400.118...

  13. Tritium evolution from various morphologies of palladium

    Microsoft Academic Search

    D. G. Tuggle; T. N. Claytor; S. F. Taylor

    1994-01-01

    The authors have been able to extend the tritium production techniques to various novel morphologies of palladium. These include small solid wires of various diameters and a type of pressed powder wire and a plasma cell. In most successful experiments, the amount of palladium required, for an equivalent tritium output, has been reduced by a factor of 100 over the

  14. Biaxially textured metal substrate with palladium layer

    DOEpatents

    Robbins, William B. (Maplewood, MN)

    2002-12-31

    Described is an article comprising a biaxially textured metal substrate and a layer of palladium deposited on at least one major surface of the metal substrate; wherein the palladium layer has desired in-plane and out-of-plane crystallographic orientations, which allow subsequent layers that are applied on the article to also have the desired orientations.

  15. High-Performance, Durable, Palladium-Alloy Hydrogen Separation and Purification

    E-print Network

    High-Performance, Durable, Palladium-Alloy Membrane for Hydrogen Separation and Purification;2 Minute Review of Key Performance Metrics ¾ DOE Multi-Year RD&D plan established targets for gas ¾ Commercialization of Pd alloy membranes would provide a new tool for design of energy efficient systems through

  16. Palladium(II)-Catalyzed Cyclization of Unsaturated Hydroperoxides for the Synthesis of 1,2-Dioxanes

    PubMed Central

    Harris, Jason R.; Waetzig, Shelli R.

    2009-01-01

    The cyclization of ?,?-unsaturated tertiary hydroperoxides in the presence of a palladium(II) catalyst afforded 1,2-dioxanes resembling biologically active natural products. A variety of substrates were screened, and synthetic manipulations were accomplished to construct compounds with structural similarity to antimalarial targets. PMID:19555089

  17. Palladium-catalyzed 2,5-diheteroarylation of 2,5-dibromothiophene derivatives

    PubMed Central

    Belkessam, Fatma; Mohand, Aidene; Soulé, Jean-François

    2014-01-01

    Summary Conditions allowing the one pot 2,5-diheteroarylation of 2,5-dibromothiophene derivatives in the presence of palladium catalysts are reported. Using KOAc as the base, DMA as the solvent and only 0.5–2 mol % palladium catalysts, the target 2,5-diheteroarylated thiophenes were obtained in moderate to good yields and with a wide variety of heteroarenes such as thiazoles, thiophenes, furans, pyrroles, pyrazoles or isoxazoles. Moreover, sequential heteroarylation reactions allow the access to 2,5-diheteroarylated thiophenes bearing two different heteroaryl units. PMID:25550758

  18. Simultaneous spectrophotometric determination of mercury and palladium with Thio-Michler's Ketone using partial least squares regression and orthogonal signal correction.

    PubMed

    Niazi, Ali; Azizi, Amir; Ramezani, Majid

    2008-12-01

    A simple, novel and sensitive spectrophotometric method was described for simultaneous determination of mercury and palladium. The method is based on the complex formation of mercury and palladium with Thio-Michler's Ketone (TMK) at pH 3.5. All factors affecting on the sensitivity were optimized and the linear dynamic range for determination of mercury and palladium found. The simultaneous determination of mercury and palladium mixtures by using spectrophotometric method is a difficult problem, due to spectral interferences. By multivariate calibration methods such as partial least squares (PLS), it is possible to obtain a model adjusted to the concentration values of the mixtures used in the calibration range. Orthogonal signal correction (OSC) is a preprocessing technique used for removing the information unrelated to the target variables based on constrained principal component analysis. OSC is a suitable preprocessing method for PLS calibration of mixtures without loss of prediction capacity using spectrophotometric method. In this study, the calibration model is based on absorption spectra in the 360-660 nm range for 25 different mixtures of mercury and palladium. Calibration matrices were containing 0.025-1.60 and 0.05-0.50 microg mL(-1) of mercury and palladium, respectively. The RMSEP for mercury and palladium with OSC and without OSC were 0.013, 0.006 and 0.048, 0.030, respectively. This procedure allows the simultaneous determination of mercury and palladium in synthetic and real matrix samples good reliability of the determination. PMID:18440861

  19. Small palladium islands embedded in palladium–tungsten bimetallic nanoparticles form catalytic hotspots for oxygen reduction

    NASA Astrophysics Data System (ADS)

    Hu, Guangzhi; Nitze, Florian; Gracia-Espino, Eduardo; Ma, Jingyuan; Barzegar, Hamid Reza; Sharifi, Tiva; Jia, Xueen; Shchukarev, Andrey; Lu, Lu; Ma, Chuansheng; Yang, Guang; Wågberg, Thomas

    2014-10-01

    The sluggish kinetics of the oxygen reduction reaction at the cathode side of proton exchange membrane fuel cells is one major technical challenge for realizing sustainable solutions for the transportation sector. Finding efficient yet cheap electrocatalysts to speed up this reaction therefore motivates researchers all over the world. Here we demonstrate an efficient synthesis of palladium–tungsten bimetallic nanoparticles supported on ordered mesoporous carbon. Despite a very low percentage of noble metal (palladium:tungsten=1:8), the hybrid catalyst material exhibits a performance equal to commercial 60% platinum/Vulcan for the oxygen reduction process. The high catalytic efficiency is explained by the formation of small palladium islands embedded at the surface of the palladium–tungsten bimetallic nanoparticles, generating catalytic hotspots. The palladium islands are ~1?nm in diameter, and contain 10–20 palladium atoms that are segregated at the surface. Our results may provide insight into the formation, stabilization and performance of bimetallic nanoparticles for catalytic reactions.

  20. Gold, palladium, and gold-palladium alloy nanoshells on silica nanoparticle cores.

    PubMed

    Kim, Jun-Hyun; Bryan, William W; Chung, Hae-Won; Park, Chan Young; Jacobson, Allan J; Lee, T Randall

    2009-05-01

    The synthesis of gold, palladium, and gold-palladium alloy nanoshells (approximately 15-20 nm thickness) was accomplished by the reduction of gold and palladium ions onto dielectric silica core particles (approximately 100 nm in diameter) seeded with small gold nanoparticles (approximately 2-3 nm in diameter). The size, morphology, elemental composition, and optical properties of the nanoshells were characterized using field-emission scanning electron microscopy, transmission electron microscopy, energy-dispersive X-ray spectroscopy, X-ray diffraction, and ultraviolet-visible spectroscopy. The results demonstrate the successful growth of gold, palladium, and gold-palladium alloy nanoshells, where the optical properties systematically vary with the relative content of gold and palladium. The alloy nanoshells are being prepared for use in applications that stand to benefit from photoenhanced catalysis. PMID:20355892

  1. 7 CFR 1220.118 - Person.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ...MARKETING AGREEMENTS AND ORDERS; MISCELLANEOUS COMMODITIES), DEPARTMENT OF AGRICULTURE SOYBEAN PROMOTION, RESEARCH, AND CONSUMER INFORMATION Soybean Promotion and Research Order Definitions § 1220.118 Person. The term person...

  2. STS-118 Astronaut Barbara Morgan

    NASA Technical Reports Server (NTRS)

    2007-01-01

    Barbara R. Morgan (center), STS-118 astronaut and mission specialist, dons a training version of her shuttle launch and entry suit, prior to the start of a mission training exercise in the Space Vehicle Mock Up Facility at Johnson Space Center. United Space Alliance (USA) personnel were on hand to assist Morgan. Morgan was chosen as the first educator to become a mission specialist astronaut in 2002. The Educator Astronaut Project evolved from the Teacher in Space Project. Both aimed to engage and attract students to explore the excitement and wonder of space flight and to inspire and support educators. Morgan's primary duty was the same as it is for the entire crew, accomplish the planned objectives of the station assembly mission. But she also took part in several education-related activities.

  3. Palladium catalyzed hydrogenation of bio-oils and organic compounds

    SciTech Connect

    Elliott, Douglas C. (Richland, WA); Hu, Jianli (Kennewick, WA); Hart, Todd R. (Kennewick, WA); Neuenschwander, Gary G. (Burbank, WA)

    2008-09-16

    The invention provides palladium-catalyzed hydrogenations of bio-oils and certain organic compounds. Experimental results have shown unexpected and superior results for palladium-catalyzed hydrogenations of organic compounds typically found in bio-oils.

  4. PLATINUM-GROUP METALS (Platinum, palladium, rhodium, ruthenium, iridium, osmium)

    E-print Network

    and processors to form the Palladium Council (PdC). PdC is a nonprofit research foundation organized for the purpose of conducting research and promoting the use of palladium. PdC research and development

  5. ENCAPSULATION OF PALLADIUM IN POROUS WALL HOLLOW GLASS MICROSPHERES

    SciTech Connect

    Heung, L; George Wicks, G; Ray Schumacher, R

    2008-04-09

    A new encapsulation method was investigated in an attempt to develop an improved palladium packing material for hydrogen isotope separation. Porous wall hollow glass microspheres (PWHGMs) were produced by using a flame former, heat treating and acid leaching. The PWHGMs were then filled with palladium salt using a soak-and-dry process. The palladium salt was reduced at high temperature to leave palladium inside the microspheres.

  6. Palladium-cobalt particles as oxygen-reduction electrocatalysts

    DOEpatents

    Adzic, Radoslav (East Setauket, NY); Huang, Tao (Manorville, NY)

    2009-12-15

    The present invention relates to palladium-cobalt particles useful as oxygen-reducing electrocatalysts. The invention also relates to oxygen-reducing cathodes and fuel cells containing these palladium-cobalt particles. The invention additionally relates to methods for the production of electrical energy by using the palladium-cobalt particles of the invention.

  7. ENCAPSULATION OF PALLADIUM IN POROUS WALL HOLLOW GLASS MICROSPHERES

    Microsoft Academic Search

    L Heung; G George Wicks; R Ray Schumacher

    2008-01-01

    A new encapsulation method was investigated in an attempt to develop an improved palladium packing material for hydrogen isotope separation. Porous wall hollow glass microspheres (PWHGMs) were produced by using a flame former, heat treating and acid leaching. The PWHGMs were then filled with palladium salt using a soak-and-dry process. The palladium salt was reduced at high temperature to leave

  8. 10 CFR 1.18 - Advisory Committee on Nuclear Waste.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ...2011-01-01 false Advisory Committee on Nuclear Waste. 1.18 Section 1.18 Energy NUCLEAR REGULATORY COMMISSION STATEMENT OF ORGANIZATION...Committees § 1.18 Advisory Committee on Nuclear Waste. The Advisory Committee on...

  9. 10 CFR 1.18 - Advisory Committee on Nuclear Waste.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ...2010-01-01 false Advisory Committee on Nuclear Waste. 1.18 Section 1.18 Energy NUCLEAR REGULATORY COMMISSION STATEMENT OF ORGANIZATION...Committees § 1.18 Advisory Committee on Nuclear Waste. The Advisory Committee on...

  10. 10 CFR 1.18 - Advisory Committee on Nuclear Waste.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ...2014-01-01 false Advisory Committee on Nuclear Waste. 1.18 Section 1.18 Energy NUCLEAR REGULATORY COMMISSION STATEMENT OF ORGANIZATION...Committees § 1.18 Advisory Committee on Nuclear Waste. The Advisory Committee on...

  11. 10 CFR 1.18 - Advisory Committee on Nuclear Waste.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ...2013-01-01 false Advisory Committee on Nuclear Waste. 1.18 Section 1.18 Energy NUCLEAR REGULATORY COMMISSION STATEMENT OF ORGANIZATION...Committees § 1.18 Advisory Committee on Nuclear Waste. The Advisory Committee on...

  12. 10 CFR 1.18 - Advisory Committee on Nuclear Waste.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ...2012-01-01 false Advisory Committee on Nuclear Waste. 1.18 Section 1.18 Energy NUCLEAR REGULATORY COMMISSION STATEMENT OF ORGANIZATION...Committees § 1.18 Advisory Committee on Nuclear Waste. The Advisory Committee on...

  13. 32 CFR 536.118 - Related statutes for maritime claims.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...2013-07-01 false Related statutes for maritime claims. 536.118 Section 536.118...ACCOUNTS CLAIMS AGAINST THE UNITED STATES Maritime Claims § 536.118 Related statutes for maritime claims. (a) The AMCSA...

  14. 32 CFR 536.118 - Related statutes for maritime claims.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...2009-07-01 true Related statutes for maritime claims. 536.118 Section 536.118...ACCOUNTS CLAIMS AGAINST THE UNITED STATES Maritime Claims § 536.118 Related statutes for maritime claims. (a) The AMCSA...

  15. 32 CFR 536.118 - Related statutes for maritime claims.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...2009-07-01 true Related statutes for maritime claims. 536.118 Section 536.118...ACCOUNTS CLAIMS AGAINST THE UNITED STATES Maritime Claims § 536.118 Related statutes for maritime claims. (a) The AMCSA...

  16. 32 CFR 536.118 - Related statutes for maritime claims.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...2010-07-01 true Related statutes for maritime claims. 536.118 Section 536.118...ACCOUNTS CLAIMS AGAINST THE UNITED STATES Maritime Claims § 536.118 Related statutes for maritime claims. (a) The AMCSA...

  17. 32 CFR 536.118 - Related statutes for maritime claims.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...2014-07-01 false Related statutes for maritime claims. 536.118 Section 536.118...ACCOUNTS CLAIMS AGAINST THE UNITED STATES Maritime Claims § 536.118 Related statutes for maritime claims. (a) The AMCSA...

  18. 33 CFR 118.90 - Bridges crossing channel obliquely.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...Waters 1 2010-07-01 2010-07-01 false Bridges crossing channel obliquely. 118.90 Section 118...Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY BRIDGES BRIDGE LIGHTING AND OTHER SIGNALS § 118.90 Bridges...

  19. 33 CFR 118.100 - Retroreflective panels on bridge piers.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 2010-07-01 false Retroreflective panels on bridge piers. 118.100 Section 118.100 Navigation...Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY BRIDGES BRIDGE LIGHTING AND OTHER SIGNALS § 118.100...

  20. 47 CFR 15.118 - Cable ready consumer electronics equipment.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ...2014-10-01 false Cable ready consumer electronics equipment. 15.118 Section 15.118...Radiators § 15.118 Cable ready consumer electronics equipment. (a) All consumer electronics TV receiving equipment marketed in...

  1. 47 CFR 15.118 - Cable ready consumer electronics equipment.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ...2012-10-01 false Cable ready consumer electronics equipment. 15.118 Section 15.118...Radiators § 15.118 Cable ready consumer electronics equipment. (a) All consumer electronics TV receiving equipment marketed in...

  2. 47 CFR 15.118 - Cable ready consumer electronics equipment.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ...2013-10-01 false Cable ready consumer electronics equipment. 15.118 Section 15.118...Radiators § 15.118 Cable ready consumer electronics equipment. (a) All consumer electronics TV receiving equipment marketed in...

  3. 28 CFR 115.118 - Upgrades to facilities and technologies.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...facilities and technologies. 115.118 Section 115.118 Judicial Administration DEPARTMENT OF JUSTICE (CONTINUED) PRISON RAPE ELIMINATION ACT NATIONAL STANDARDS Standards for Lockups Prevention Planning § 115.118 Upgrades to facilities and...

  4. 28 CFR 115.118 - Upgrades to facilities and technologies.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...facilities and technologies. 115.118 Section 115.118 Judicial Administration DEPARTMENT OF JUSTICE (CONTINUED) PRISON RAPE ELIMINATION ACT NATIONAL STANDARDS Standards for Lockups Prevention Planning § 115.118 Upgrades to facilities and...

  5. 47 CFR 15.118 - Cable ready consumer electronics equipment.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ...2011-10-01 false Cable ready consumer electronics equipment. 15.118 Section 15.118...Radiators § 15.118 Cable ready consumer electronics equipment. (a) All consumer electronics TV receiving equipment marketed in...

  6. 7 CFR 900.118 - Costs.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ...AGRICULTURE GENERAL REGULATIONS Procedure Governing Meetings To Arbitrate and Mediate Disputes Relating to Sales of Milk or Its Products § 900.118 Costs. The parties jointly shall pay for the stenographic record. A copy of the record shall...

  7. 7 CFR 900.118 - Costs.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ...AGRICULTURE GENERAL REGULATIONS Procedure Governing Meetings To Arbitrate and Mediate Disputes Relating to Sales of Milk or Its Products § 900.118 Costs. The parties jointly shall pay for the stenographic record. A copy of the record shall...

  8. 7 CFR 900.118 - Costs.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ...AGRICULTURE GENERAL REGULATIONS Procedure Governing Meetings To Arbitrate and Mediate Disputes Relating to Sales of Milk or Its Products § 900.118 Costs. The parties jointly shall pay for the stenographic record. A copy of the record shall...

  9. 7 CFR 900.118 - Costs.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ...AGRICULTURE GENERAL REGULATIONS Procedure Governing Meetings To Arbitrate and Mediate Disputes Relating to Sales of Milk or Its Products § 900.118 Costs. The parties jointly shall pay for the stenographic record. A copy of the record shall...

  10. 7 CFR 900.118 - Costs.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ...AGRICULTURE GENERAL REGULATIONS Procedure Governing Meetings To Arbitrate and Mediate Disputes Relating to Sales of Milk or Its Products § 900.118 Costs. The parties jointly shall pay for the stenographic record. A copy of the record shall...

  11. Dasycladus ramosus, WNC2005-118

    NSDL National Science Digital Library

    Dr. Wilson Freshwater

    2008-03-07

    WNC2005-118, Dasycladus ramosus Chamberlain, intertidal, Jesser Point, Sodwana Bay, Kwazulu-Natal, South Africa, collection SA05-070, 18 Aug 2005, Coll: Brooke Stuercke, Det: B Stuercke & DW Freshwater, voucher for Fritz's study 1 of 2

  12. 20 CFR 632.118 - Nepotism.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ...DEPARTMENT OF LABOR INDIAN AND NATIVE AMERICAN EMPLOYMENT AND TRAINING PROGRAMS...118 Nepotism. (a) No Native American grantee, subgrantee, contractor...administrative capacity by the Native American grantee, subgrantee or...

  13. 20 CFR 632.118 - Nepotism.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ...DEPARTMENT OF LABOR INDIAN AND NATIVE AMERICAN EMPLOYMENT AND TRAINING PROGRAMS...118 Nepotism. (a) No Native American grantee, subgrantee, contractor...administrative capacity by the Native American grantee, subgrantee or...

  14. 20 CFR 632.118 - Nepotism.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ...DEPARTMENT OF LABOR INDIAN AND NATIVE AMERICAN EMPLOYMENT AND TRAINING PROGRAMS...118 Nepotism. (a) No Native American grantee, subgrantee, contractor...administrative capacity by the Native American grantee, subgrantee or...

  15. 40 CFR 98.118 - Definitions.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...CONTINUED) AIR PROGRAMS (CONTINUED) MANDATORY GREENHOUSE GAS REPORTING Ferroalloy Production § 98.118 Definitions...intermittently every minute. b Temperature measured in off-gas channel downstream of the furnace...

  16. Sputtered thin-film pH electrodes of platinum, palladium, ruthenium, and iridium oxides

    Microsoft Academic Search

    Kenneth G. Kreider; Michael J. Tarlov; James P. Cline

    1995-01-01

    Thin-film metal oxides have been investigated for use as pH electrodes. These materials may have potential for measuring pH under conditions that are not favorable for glass electrodes. Reactive sputtering of platinum, palladium, ruthenium, and iridium metal targets in argon-oxygen atmospheres is used to produce 1 ?m thick electrodes on alumina and silicon substrates. The structure of the deposits is

  17. Highly Concentrated Palladium Hydrides/Deuterides; Theory

    SciTech Connect

    Papaconstantopoulos, Dimitrios

    2013-11-26

    Accomplishments are reported in these areas: tight-binding molecular dynamics study of palladium; First-principles calculations and tight-binding molecular dynamics simulations of the palladium-hydrogen system; tight-binding studies of bulk properties and hydrogen vacancies in KBH{sub 4}; tight-binding study of boron structures; development of angular dependent potentials for Pd-H; and density functional and tight-binding calculations for the light-hydrides NaAlH4 and NaBH4

  18. Small palladium islands embedded in palladium-tungsten bimetallic nanoparticles form catalytic hotspots for oxygen reduction.

    PubMed

    Hu, Guangzhi; Nitze, Florian; Gracia-Espino, Eduardo; Ma, Jingyuan; Barzegar, Hamid Reza; Sharifi, Tiva; Jia, Xueen; Shchukarev, Andrey; Lu, Lu; Ma, Chuansheng; Yang, Guang; Wågberg, Thomas

    2014-01-01

    The sluggish kinetics of the oxygen reduction reaction at the cathode side of proton exchange membrane fuel cells is one major technical challenge for realizing sustainable solutions for the transportation sector. Finding efficient yet cheap electrocatalysts to speed up this reaction therefore motivates researchers all over the world. Here we demonstrate an efficient synthesis of palladium-tungsten bimetallic nanoparticles supported on ordered mesoporous carbon. Despite a very low percentage of noble metal (palladium:tungsten=1:8), the hybrid catalyst material exhibits a performance equal to commercial 60% platinum/Vulcan for the oxygen reduction process. The high catalytic efficiency is explained by the formation of small palladium islands embedded at the surface of the palladium-tungsten bimetallic nanoparticles, generating catalytic hotspots. The palladium islands are ~1?nm in diameter, and contain 10-20 palladium atoms that are segregated at the surface. Our results may provide insight into the formation, stabilization and performance of bimetallic nanoparticles for catalytic reactions. PMID:25308245

  19. Viral-templated Palladium Nanocatalysts

    NASA Astrophysics Data System (ADS)

    Yang, Cuixian

    Despite recent progress on nanocatalysis, there exist several critical challenges in simple and readily controllable nanocatalyst synthesis including the unpredictable particle growth, deactivation of catalytic activity, cumbersome catalyst recovery and lack of in-situ reaction monitoring. In this dissertation, two novel approaches are presented for the fabrication of viral-templated palladium (Pd) nanocatalysts, and their catalytic activities for dichromate reduction reaction and Suzuki Coupling reaction were thoroughly studied. In the first approach, viral template based bottom-up assembly is employed for the Pd nanocatalyst synthesis in a chip-based format. Specifically, genetically displayed cysteine residues on each coat protein of Tobacco Mosaic Virus (TMV) templates provide precisely spaced thiol functionalities for readily controllable surface assembly and enhanced formation of catalytically active Pd nanoparticles. Catalysts with the chip-based format allow for simple separation and in-situ monitoring of the reaction extent. Thorough examination of synthesis-structure-activity relationship of Pd nanoparticles formed on surface-assembled viral templates shows that Pd nanoparticle size, catalyst loading density and catalytic activity of viral-templated Pd nanocatalysts can be readily controlled simply by tuning the synthesis conditions. The viral-templated Pd nanocatalysts with optimized synthesis conditions are shown to have higher catalytic activity per unit Pd mass than the commercial Pd/C catalysts. Furthermore, tunable and selective surface assembly of TMV biotemplates is exploited to control the loading density and location of Pd nanocatalysts on solid substrates via preferential electroless deposition. In addition, the catalytic activities of surface-assembled TMV-templated Pd nanocatalysts were also investigated for the ligand-free Suzuki Coupling reaction under mild reaction conditions. The chip-based format enables simple catalyst separation and reuse as well as facile product recovery. Reaction condition studies show that the solvent ratio played an important role in the selectivity of the Suzuki reaction, and that a higher water/acetonitrile ratio significantly facilitated the cross-coupling pathway. Meanwhile, in-depth characterizations including Atomic Force Microscopy (AFM), Grazing Incidence Small Angle X-ray Scattering (GISAXS), Inductively Coupled Plasma Optical Emission Spectrometry (ICP-OES) and X-ray Photoelectron Spectroscopy (XPS) were carried out for these chip-based viral-templated Pd nanocatalysts. In the second approach, catalytically active TMV-templated Pd nanoparticles are encapsulated in readily exploited polymeric microparticle formats. Specifically, small (1˜2 nm), uniform and highly crystalline palladium (Pd) nanoparticles are spontaneously formed along (TMV) biotemplates without external reducing agents. The as-prepared Pd-TMV complexes are integrated into the hybrid poly(ethylene glycol)(PEG)-based microparticles via replica molding (RM) technique in a simple, robust and highly reproducible manner. The Pd-TMV complex structure was characterized by Transmission Electron Microscopy (TEM). The hybrid Pd-TMV-PEG microparticles are examined to have high catalytic activity, recyclability and stability through dichromate reduction. Combined these findings represent a significant step toward simple, robust, scalable synthesis and fabrication of efficient biotemplate-supported Pd nanocatalysts in readily deployable polymeric formats with high capacity in a well-controlled manner. These two simple, robust and readily controllable approaches for the fabrication of viral-templated Pd nanocatalysts, in both chip-based and hydrogel-encapsulated formats, can be readily extended to a variety of other nano-bio hybrid material synthesis in other catalytic reaction systems.

  20. 16 CFR 23.7 - Misuse of the words “platinum,” “iridium,” “palladium,” “ruthenium,” “rhodium,” and “osmium.”

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... Misuse of the words “platinum,” “iridium,” “palladium,” “ruthenium,” “rhodium...deceptive to use the words “platinum,” “iridium,” “palladium,” “ruthenium...Platinum Group Metals (PGM) are Platinum, Iridium, Palladium, Ruthenium, Rhodium,...

  1. Hydrogen and Palladium Foil: Two Classroom Demonstrations

    ERIC Educational Resources Information Center

    Klotz, Elsbeth; Mattson, Bruce

    2009-01-01

    In these two classroom demonstrations, students observe the reaction between H[subscript 2] gas and Pd foil. In the first demonstration, hydrogen and palladium combine within one minute at 1 atm and room temperature to yield the non-stoichiometric, interstitial hydride with formula close to the maximum known value, PdH[subscript 0.7]. In the…

  2. Extracellular Palladium Nanoparticle Production using Geobacter sulfurreducens

    E-print Network

    synthesis requires use of strong reducing agents, as well as ligand stabilizing polymers and capping agents capping agents and stabilizers.8 The catalytic activity of biologically supported palladium nano streams.7 The major advantages of using bacteria is that the cells are the reducing agents, eliminating

  3. Process for recovery of palladium from nuclear fuel reprocessing wastes

    DOEpatents

    Campbell, David O. (Oak Ridge, TN); Buxton, Samuel R. (Wartburg, TN)

    1981-01-01

    Palladium is selectively removed from spent nuclear fuel reprocessing waste by adding sugar to a strong nitric acid solution of the waste to partially denitrate the solution and cause formation of an insoluble palladium compound. The process includes the steps of: (a) adjusting the nitric acid content of the starting solution to about 10 M, (b) adding 50% sucrose solution in an amount sufficient to effect the precipitation of the palladium compound, (c) heating the solution at reflux temperature until precipitation is complete, and (d) centrifuging the solution to separate the precipitated palladium compound from the supernatant liquid.

  4. Process for recovery of palladium from nuclear fuel reprocessing wastes

    DOEpatents

    Campbell, D.O.; Buxton, S.R.

    1980-06-16

    Palladium is selectively removed from spent nuclear fuel reprocessing waste by adding sugar to a strong nitric acid solution of the waste to partially denitrate the solution and cause formation of an insoluble palladium compound. The process includes the steps of: (a) adjusting the nitric acid content of the starting solution to about 10 M; (b) adding 50% sucrose solution in an amount sufficient to effect the precipitation of the palladium compound; (c) heating the solution at reflux temperature until precipitation is complete; and (d) centrifuging the solution to separate the precipitated palladium compound from the supernatant liquid.

  5. Two-step photoionisation of palladium

    SciTech Connect

    Derzhiev, V I; Dyakin, V M; Il'kaev, R I; Mikhal'tsov, L A; Selemir, Victor D; Sidorov, I I; Tkachev, Aleksei N; Chaushanskii, S A; Yakovlenko, Sergei I [A.M. Prokhorov General Physics Institute, Russian Academy of Sciences, Moscow (Russian Federation)

    2002-07-31

    The efficiency of two-step ionisation of palladium involving the 276.4-nm 4d{sup 101}S{sub 0} - 4d{sup 9}5p{sup 3}P{sub 1} transition is measured as a function of the laser radiation intensity in experiments aimed at laser separation of isotopes. It is shown that to obtain the efficient (over 50%) two-step ionisation of palladium by 10-ns laser pulses with a pulse repetition rate of 10 kHz, an average radiation intensity should exceed 100 W cm{sup -2}. The results of comparison of theoretical and experimental data on the two-step ionisation efficiency make it possible to estimate the photoionisation cross section of the 4d{sup 9}5p{sup 3}P{sub 1} state ({sigma}{sub i} {approx} 10{sup -16} cm{sup 2}). (interaction of laser radiation with matter)

  6. Platinum-ruthenium-palladium fuel cell electrocatalyst

    DOEpatents

    Gorer, Alexander

    2006-02-07

    A catalyst suitable for use in a fuel cell, especially as an anode catalyst, that contains platinum at a concentration that is between about 20 and about 60 atomic percent, ruthenium at a concentration that is between about 20 and about 60 atomic percent, palladium at a concentration that is between about 5 and about 45 atomic percent, and having an atomic ratio of platinum to ruthenium that is between about 0.7 and about 1.2. Alternatively, the catalyst may contain platinum at a concentration that is between about 25 and about 50 atomic percent, ruthenium at a concentration that is between about 25 and about 55 atomic percent, palladium at a concentration that is between about 5 and about 45 atomic percent, and having a difference between the concentrations of ruthenium and platinum that is no greater than about 20 atomic percent.

  7. Assembly Bill No. 118 CHAPTER 750

    E-print Network

    of State October 14, 2007.] legislative counsel's digest AB 118, Nunez. Alternative fuels and vehicle a state plan to increase the use of alternative fuels, as defined. Existing law establishes the Public the Alternative and Renewable Fuel and Vehicle Technology Fund (Alternative Fund), and would require the Energy

  8. Martin Ames Harrison 118B Conduit Street

    E-print Network

    Bigelow, Stephen

    Martin Ames Harrison 118B Conduit Street Annapolis, MD 21401 805-776-3847 martin@math.ucsb.edu math.ucsb.edu/martin, Mathematica, Maple, Sage, Macaulay2, R Papers [1] Amina Dozier, Charles Fahringer, and Martin Harrison-09-02.pdf. [2] Michael Freitas, Martin Harrison, and Allen Jarboe. Gauss Words and Planar Curves. 2007. url

  9. Problem 118: Power Generation Matthew Grum

    E-print Network

    St Andrews, University of

    Problem 118: Power Generation Matthew Grum Dept. Computer Science, The University of York July 2004 This problem concerns running power generators that are plugged into a grid. There are a number of generators of several types available. Each generator type has a minimum and maximum power output, a starup cost

  10. Electrodeposition of thick palladium coatings from a palladium(II)-containing ionic liquid.

    PubMed

    Schaltin, Stijn; Brooks, Neil R; Sniekers, Jeroen; Van Meervelt, Luc; Binnemans, Koen; Fransaer, Jan

    2014-09-14

    The first palladium-containing Liquid Metal Salts (LMS) are presented and shown to be suitable electrolytes for the electrodeposition of palladium. The homoleptic LMS of formula [Pd(MeIm)4][Tf2N]2 or [Pd(EtIm)4][Tf2N]2 (MeIm = N-methylimidazole, EtIm = N-ethylimidazole) have higher melting points than the heteroleptic [Pd(MeIm)2(EtIm)2][Tf2N]2, which is proved to be the most promising electrolyte. The deposition reaction in these LMS was found to be irreversible but smooth and dense palladium layers can be deposited that are crack-free up to a thickness of 10 microns. PMID:25054976

  11. SUPERCONDUCTIVITY OF DISORDERED PALLADIUM B. STRITZKER

    E-print Network

    Paris-Sud XI, Université de

    L-397 SUPERCONDUCTIVITY OF DISORDERED PALLADIUM B. STRITZKER Institut für Festkörperforschung, KFA températures avec des ions He+. Abstract. 2014 Superconductivity up to 3.2. K has been found in Pd films after not become superconducting above 0.08 K. Irradiation of these films with 130 keV He+ ions at 4.2 K leads

  12. Palladium-catalyzed asymmetric quaternary stereocenter formation.

    PubMed

    Gottumukkala, Aditya L; Matcha, Kiran; Lutz, Martin; de Vries, Johannes G; Minnaard, Adriaan J

    2012-05-29

    An efficient palladium catalyst is presented for the formation of benzylic quaternary stereocenters by conjugate addition of arylboronic acids to a variety of ?,?-disubstituted carbocyclic, heterocyclic, and acyclic enones. The catalyst is readily prepared from PdCl(2), PhBOX, and AgSbF(6), and provides products in up to 99% enantiomeric excess, with good yields. Based on this strategy, (-)-?-cuparenone has been prepared in only two steps. PMID:22532469

  13. MEMS-based thin palladium membrane microreactors

    Microsoft Academic Search

    S.-Y. Ye; S. Tanaka; M. Esashi; S. Hamakawa; T. Hanaoka; F. Mizukami

    2006-01-01

    We microfabricated a MEMS (Micro Electro Mechanical System) based thin palladium (Pd) membrane microreactor with oxidized porous silicon (PS) support. The membranes were characterized by permeation experiments with hydrogen, nitrogen, and helium at temperature ranging from 200°C to 250°C. The hydrogen flux through the Pd membrane with a thickness of 340 nm was 0.112 mol m-2 s-1 at 250°C and

  14. Platinum- and platinum alloy-coated palladium and palladium alloy particles and uses thereof

    DOEpatents

    Adzic, Radoslav; Zhang, Junliang; Mo, Yibo; Vukmirovic, Miomir Branko

    2010-04-06

    The present invention relates to particle and nanoparticle composites useful as oxygen-reduction electrocatalysts. The particle composites are composed of a palladium or palladium-alloy particle or nanoparticle substrate coated with an atomic submonolayer, monolayer, bilayer, or trilayer of zerovalent platinum atoms. The invention also relates to a catalyst and a fuel cell containing the particle or nanoparticle composites of the invention. The invention additionally includes methods for oxygen reduction and production of electrical energy by using the particle and nanoparticle composites of the invention.

  15. 46 CFR 118.410 - Fixed gas fire extinguishing systems.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ...2014-10-01 2014-10-01 false Fixed gas fire extinguishing systems. 118.410 Section 118...OVERNIGHT ACCOMMODATIONS FOR MORE THAN 49 PASSENGERS FIRE PROTECTION EQUIPMENT Fixed Fire Extinguishing and Detecting Systems §...

  16. 46 CFR 118.410 - Fixed gas fire extinguishing systems.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ...2013-10-01 2013-10-01 false Fixed gas fire extinguishing systems. 118.410 Section 118...OVERNIGHT ACCOMMODATIONS FOR MORE THAN 49 PASSENGERS FIRE PROTECTION EQUIPMENT Fixed Fire Extinguishing and Detecting Systems §...

  17. 46 CFR 118.410 - Fixed gas fire extinguishing systems.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ...2011-10-01 2011-10-01 false Fixed gas fire extinguishing systems. 118.410 Section 118...OVERNIGHT ACCOMMODATIONS FOR MORE THAN 49 PASSENGERS FIRE PROTECTION EQUIPMENT Fixed Fire Extinguishing and Detecting Systems §...

  18. 46 CFR 118.410 - Fixed gas fire extinguishing systems.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ...2012-10-01 2012-10-01 false Fixed gas fire extinguishing systems. 118.410 Section 118...OVERNIGHT ACCOMMODATIONS FOR MORE THAN 49 PASSENGERS FIRE PROTECTION EQUIPMENT Fixed Fire Extinguishing and Detecting Systems §...

  19. 50 CFR 300.118 - Facilitation of enforcement and inspection.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ...300.118 Wildlife and Fisheries INTERNATIONAL FISHING AND RELATED ACTIVITIES INTERNATIONAL FISHERIES REGULATIONS Antarctic Marine Living Resources § 300.118 Facilitation of enforcement and inspection. In addition to the facilitation...

  20. 50 CFR 300.118 - Facilitation of enforcement and inspection.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...300.118 Wildlife and Fisheries INTERNATIONAL FISHING AND RELATED ACTIVITIES INTERNATIONAL FISHERIES REGULATIONS Antarctic Marine Living Resources § 300.118 Facilitation of enforcement and inspection. In addition to the facilitation...

  1. 50 CFR 300.118 - Facilitation of enforcement and inspection.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ...300.118 Wildlife and Fisheries INTERNATIONAL FISHING AND RELATED ACTIVITIES INTERNATIONAL FISHERIES REGULATIONS Antarctic Marine Living Resources § 300.118 Facilitation of enforcement and inspection. In addition to the facilitation...

  2. 50 CFR 300.118 - Facilitation of enforcement and inspection.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ...300.118 Wildlife and Fisheries INTERNATIONAL FISHING AND RELATED ACTIVITIES INTERNATIONAL FISHERIES REGULATIONS Antarctic Marine Living Resources § 300.118 Facilitation of enforcement and inspection. In addition to the facilitation...

  3. 50 CFR 300.118 - Facilitation of enforcement and inspection.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ...300.118 Wildlife and Fisheries INTERNATIONAL FISHING AND RELATED ACTIVITIES INTERNATIONAL FISHERIES REGULATIONS Antarctic Marine Living Resources § 300.118 Facilitation of enforcement and inspection. In addition to the facilitation...

  4. Mechanistic approaches to palladium-catalyzed alkene difunctionalization reactions

    PubMed Central

    Jensen, Katrina H.; Sigman, Matthew S.

    2009-01-01

    Alkene difunctionalization, the addition of two functional groups across a double bond, exemplifies a class of reactions with significant synthetic potential. This emerging area examines recent developments of palladium-catalyzed difunctionalization reactions, with a focus on mechanistic strategies that allow for functionalization of a common palladium alkyl intermediate. PMID:18972034

  5. PLATINUM-GROUP METALS (Platinum, palladium, rhodium, ruthenium, iridium, osmium)

    E-print Network

    126 PLATINUM-GROUP METALS (Platinum, palladium, rhodium, ruthenium, iridium, osmium) (Data,000 Palladium 78,900 92,500 124,000 146,000 95,000 Rhodium 7,210 7,820 9,600 9,650 7,000 Ruthenium 4,490 9,880 7

  6. PLATINUM-GROUP METALS (Platinum, palladium, rhodium, ruthenium, iridium, osmium)

    E-print Network

    128 PLATINUM-GROUP METALS (Platinum, palladium, rhodium, ruthenium, iridium, osmium) (Data,000 Palladium 92,500 124,000 146,000 148,000 151,000 Rhodium 7,820 9,600 9,650 14,400 8,600 Ruthenium 9,880 7

  7. Effect of Palladium Form on Tetraphenylborate Decomposition Rate

    SciTech Connect

    Walker, D.D. [Westinghouse Savannah River Company, AIKEN, SC (United States)

    1998-04-28

    Palladium catalyzes the decomposition of tetraphenylborate in alkaline solutions. Researchers postulate several decomposition mechanisms that differ in the form of the palladium catalyst. Potential forms include solid and soluble, different soluble species (such as aqueous or organic soluble), and different oxidation states (i.e., 0, II, and IV). Initial tests measured the reactivity and distribution of four Pd forms in tetraphenylborate slurries.

  8. 46 CFR 118.320 - Fire hoses and nozzles.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...2010-10-01 2010-10-01 false Fire hoses and nozzles. 118.320 Section 118.320 Shipping...Fire Main System § 118.320 Fire hoses and nozzles. (a) A fire hose with a nozzle must be attached to each fire hydrant...

  9. 33 CFR 118.80 - Lights on bascule bridges.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...2010-07-01 2010-07-01 false Lights on bascule bridges. 118.80 Section 118.80 Navigation and Navigable...Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY BRIDGES BRIDGE LIGHTING AND OTHER SIGNALS § 118.80 Lights...

  10. 33 CFR 118.65 - Lights on fixed bridges.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...2010-07-01 2010-07-01 false Lights on fixed bridges. 118.65 Section 118.65 Navigation and Navigable...Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY BRIDGES BRIDGE LIGHTING AND OTHER SIGNALS § 118.65 Lights...

  11. 33 CFR 118.85 - Lights on vertical lift bridges.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...2010-07-01 2010-07-01 false Lights on vertical lift bridges. 118.85 Section 118.85 Navigation and Navigable...Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY BRIDGES BRIDGE LIGHTING AND OTHER SIGNALS § 118.85 Lights...

  12. 33 CFR 118.70 - Lights on swing bridges.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...2010-07-01 2010-07-01 false Lights on swing bridges. 118.70 Section 118.70 Navigation and Navigable...Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY BRIDGES BRIDGE LIGHTING AND OTHER SIGNALS § 118.70 Lights...

  13. 46 CFR 118.310 - Fire main and hydrants.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ...Shipping 4 2013-10-01 2013-10-01 false Fire main and hydrants. 118.310 Section 118.310...OVERNIGHT ACCOMMODATIONS FOR MORE THAN 49 PASSENGERS FIRE PROTECTION EQUIPMENT Fire Main System § 118.310 Fire main and...

  14. 46 CFR 118.320 - Fire hoses and nozzles.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ...Shipping 4 2011-10-01 2011-10-01 false Fire hoses and nozzles. 118.320 Section 118.320...OVERNIGHT ACCOMMODATIONS FOR MORE THAN 49 PASSENGERS FIRE PROTECTION EQUIPMENT Fire Main System § 118.320 Fire hoses and...

  15. 46 CFR 118.320 - Fire hoses and nozzles.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ...Shipping 4 2014-10-01 2014-10-01 false Fire hoses and nozzles. 118.320 Section 118.320...OVERNIGHT ACCOMMODATIONS FOR MORE THAN 49 PASSENGERS FIRE PROTECTION EQUIPMENT Fire Main System § 118.320 Fire hoses and...

  16. 46 CFR 118.310 - Fire main and hydrants.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...Shipping 4 2010-10-01 2010-10-01 false Fire main and hydrants. 118.310 Section 118.310...OVERNIGHT ACCOMMODATIONS FOR MORE THAN 49 PASSENGERS FIRE PROTECTION EQUIPMENT Fire Main System § 118.310 Fire main and...

  17. 46 CFR 118.310 - Fire main and hydrants.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ...Shipping 4 2014-10-01 2014-10-01 false Fire main and hydrants. 118.310 Section 118.310...OVERNIGHT ACCOMMODATIONS FOR MORE THAN 49 PASSENGERS FIRE PROTECTION EQUIPMENT Fire Main System § 118.310 Fire main and...

  18. 46 CFR 118.310 - Fire main and hydrants.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ...Shipping 4 2012-10-01 2012-10-01 false Fire main and hydrants. 118.310 Section 118.310...OVERNIGHT ACCOMMODATIONS FOR MORE THAN 49 PASSENGERS FIRE PROTECTION EQUIPMENT Fire Main System § 118.310 Fire main and...

  19. 46 CFR 118.320 - Fire hoses and nozzles.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ...Shipping 4 2012-10-01 2012-10-01 false Fire hoses and nozzles. 118.320 Section 118.320...OVERNIGHT ACCOMMODATIONS FOR MORE THAN 49 PASSENGERS FIRE PROTECTION EQUIPMENT Fire Main System § 118.320 Fire hoses and...

  20. 46 CFR 118.310 - Fire main and hydrants.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ...Shipping 4 2011-10-01 2011-10-01 false Fire main and hydrants. 118.310 Section 118.310...OVERNIGHT ACCOMMODATIONS FOR MORE THAN 49 PASSENGERS FIRE PROTECTION EQUIPMENT Fire Main System § 118.310 Fire main and...

  1. 46 CFR 118.320 - Fire hoses and nozzles.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ...Shipping 4 2013-10-01 2013-10-01 false Fire hoses and nozzles. 118.320 Section 118.320...OVERNIGHT ACCOMMODATIONS FOR MORE THAN 49 PASSENGERS FIRE PROTECTION EQUIPMENT Fire Main System § 118.320 Fire hoses and...

  2. 27 CFR 9.118 - Ben Lomond Mountain.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 2010-04-01 false Ben Lomond Mountain. 9.118 Section 9.118 Alcohol...Viticultural Areas § 9.118 Ben Lomond Mountain. (a) Name. The name of the viticultural...described in this section is “Ben Lomond Mountain.” (b) Approved maps. The...

  3. CONTENT OF PLATINUM AND PALLADIUM IN RAT TISSUE: CORRELATION OF TISSUE CONCENTRATION OF PLATINUM AND PALLADIUM WITH BIOCHEMICAL EFFECTS

    EPA Science Inventory

    Platinum and palladium are used as the active components in the catalytic converters of air pollution control devices of motor vehicles. The use of these metals is accompanied by the potential loss of platinum and palladium into the environment. This laboratory has been involved ...

  4. Palladium-mediated aerobic oxidation of organic substrates: the role of metal versus hydrogen peroxide

    Microsoft Academic Search

    Joseph E Remias; Ayusman Sen

    2002-01-01

    Palladium species catalyze the aerobic oxidation of a variety of organic substrates. The reoxidation of palladium(0) to palladium(II) by dioxygen, a necessary step in these catalytic oxidations, results in the simultaneous formation of free peroxide. However, the continued catalytic generation of peroxide requires the rereduction of palladium(II) to palladium(0). This can be achieved by alkenes and alcohols which are then

  5. Scalable synthesis of nanoporous palladium powders.

    SciTech Connect

    Robinson, David B.; Tran, Kim L.; Clift, W. Miles; Arslan Ilke; Langham, Mary Elizabeth; Ong, Markus D.; Fares, Stephen James

    2009-03-01

    Nanoporous palladium powders are synthesized on milligram to gram scales by chemical reduction of tetrachloro complexes by ascorbate in a concentrated aqueous surfactant at temperatures between -20 and 30 C. Particle diameters are approximately 50 nm, and each particle is perforated by 3 nm pores, as determined by electron tomography. These materials are of potential value for storage of hydrogen isotopes and electrical charge; producing them at large scales in a safe and efficient manner will help realize this. A slightly modified procedure also results in nanoporous platinum.

  6. Direct Observation of Paramagnons in Palladium

    SciTech Connect

    Doubble, R. [University of Bristol, UK; Hayden, S M. [University of Bristol, UK; Dai, Pengcheng [University of Tennessee, Knoxville (UTK); Mook Jr, Herbert A [ORNL; Thompson, James R [ORNL; Frost, C. [ISIS Facility, Rutherford Appleton Laboratory

    2010-01-01

    We report an inelastic neutron scattering study of the spin fluctuations in the nearly ferromagnetic element palladium. Dispersive over-damped collective magnetic excitations or 'paramagnons' are observed up to 128 meV. We analyze our results in terms of a Moriya-Lonzarich-type spin-fluctuation model and estimate the contribution of the spin fluctuations to the low-temperature heat capacity. In spite of the paramagnon excitations being relatively strong, their relaxation rates are large. This leads to a small contribution to the low-temperature electronic specific heat.

  7. Progress in palladium-based catalytic systems for the sustainable synthesis of annulated heterocycles: a focus on indole backbones.

    PubMed

    Platon, Mélanie; Amardeil, Régine; Djakovitch, Laurent; Hierso, Jean-Cyrille

    2012-05-21

    A survey highlighting the most recent palladium catalytic systems produced and their performances for progress in direct synthesis of indole backbones by heterocarbocyclization of reactive substrates is provided. The discussion is developed in relation with the principles of sustainable chemistry concerning atom and mass economy. In this respect, the general convergent character of the syntheses is of particular interest (one-pot, domino, cascade or tandem reactions), and the substrates accessibility and reactivity, together with the final waste production, are also important. This critical review clearly indicates that the development of ligand chemistry, mainly phosphines and carbenes, in the last few decades gave a significant impetus to powerful functionalization of indoles at virtually all positions of this ubiquitous backbone (118 references). PMID:22447100

  8. Biochemical Analysis of the Role of G118R-Linked Dolutegravir Drug Resistance Substitutions in HIV-1 Integrase

    PubMed Central

    Quashie, Peter K.; Mesplède, Thibault; Han, Ying-Shan; Veres, Tamar; Osman, Nathan; Hassounah, Said; Sloan, Richard D.; Xu, Hong-Tao

    2013-01-01

    Drug resistance mutations (DRMs) have been reported for all currently approved anti-HIV drugs, including the latest integrase strand transfer inhibitors (INSTIs). We previously used the new INSTI dolutegravir (DTG) to select a G118R integrase resistance substitution in tissue culture and also showed that secondary substitutions emerged at positions H51Y and E138K. Now, we have characterized the impact of the G118R substitution, alone or in combination with either H51Y or E138K, on 3? processing and integrase strand transfer activity. The results show that G118R primarily impacted the strand transfer step of integration by diminishing the ability of integrase-long terminal repeat (LTR) complexes to bind target DNA. The addition of H51Y and E138K to G118R partially restored strand transfer activity by modulating the formation of integrase-LTR complexes through increasing LTR DNA affinity and total DNA binding, respectively. This unique mechanism, in which one function of HIV integrase partially compensates for the defect in another function, has not been previously reported. The G118R substitution resulted in low-level resistance to DTG, raltegravir (RAL), and elvitegravir (EVG). The addition of either of H51Y or E138K to G118R did not enhance resistance to DTG, RAL, or EVG. Homology modeling provided insight into the mechanism of resistance conferred by G118R as well as the effects of H51Y or E138K on enzyme activity. The G118R substitution therefore represents a potential avenue for resistance to DTG, similar to that previously described for the R263K substitution. For both pathways, secondary substitutions can lead to either diminished integrase activity and/or increased INSTI susceptibility. PMID:24080645

  9. A Novel Small Molecule FL118 That Selectively Inhibits Survivin, Mcl-1, XIAP and cIAP2 in a p53-Independent Manner, Shows Superior Antitumor Activity

    PubMed Central

    Cheng, Qiuying; Keefe, James T.; Rustum, Youcef M.; Li, Fengzhi

    2012-01-01

    Drug/radiation resistance to treatment and tumor relapse are major obstacles in identifying a cure for cancer. Development of novel agents that address these challenges would therefore be of the upmost importance in the fight against cancer. In this regard, studies show that the antiapoptotic protein survivin is a central molecule involved in both hurdles. Using cancer cell-based survivin-reporter systems (US 7,569,221 B2) via high throughput screening (HTS) of compound libraries, followed by in vitro and in vivo analyses of HTS-derived hit-lead compounds, we identified a novel anticancer compound (designated FL118). FL118 shows structural similarity to irinotecan. However, while the inhibition of DNA topoisomerase 1 activity by FL118 was no better than the active form of irinotecan, SN-38 at 1 µM, FL118 effectively inhibited cancer cell growth at less than nM levels in a p53 status-independent manner. Moreover, FL118 selectively inhibited survivin promoter activity and gene expression also in a p53 status-independent manner. Although the survivin promoter-reporter system was used for the identification of FL118, our studies revealed that FL118 not only inhibits survivin expression but also selectively and independently inhibits three additional cancer-associated survival genes (Mcl-1, XIAP and cIAP2) in a p53 status-independent manner, while showing no inhibitory effects on control genes. Genetic silencing or overexpression of FL118 targets demonstrated a role for these targets in FL118’s effects. Follow-up in vivo studies revealed that FL118 exhibits superior antitumor efficacy in human tumor xenograft models in comparison with irinotecan, topotecan, doxorubicin, 5-FU, gemcitabine, docetaxel, oxaliplatin, cytoxan and cisplatin, and a majority of mice treated with FL118 showed tumor regression with a weekly × 4 schedule. FL118 induced favorable body-weight-loss profiles (temporary and reversible) and was able to eliminate large tumors. Together, the molecular targeting features of FL118 plus its superior antitumor activity warrant its further development toward clinical trials. PMID:23029106

  10. A novel small molecule FL118 that selectively inhibits survivin, Mcl-1, XIAP and cIAP2 in a p53-independent manner, shows superior antitumor activity.

    PubMed

    Ling, Xiang; Cao, Shousong; Cheng, Qiuying; Keefe, James T; Rustum, Youcef M; Li, Fengzhi

    2012-01-01

    Drug/radiation resistance to treatment and tumor relapse are major obstacles in identifying a cure for cancer. Development of novel agents that address these challenges would therefore be of the upmost importance in the fight against cancer. In this regard, studies show that the antiapoptotic protein survivin is a central molecule involved in both hurdles. Using cancer cell-based survivin-reporter systems (US 7,569,221 B2) via high throughput screening (HTS) of compound libraries, followed by in vitro and in vivo analyses of HTS-derived hit-lead compounds, we identified a novel anticancer compound (designated FL118). FL118 shows structural similarity to irinotecan. However, while the inhibition of DNA topoisomerase 1 activity by FL118 was no better than the active form of irinotecan, SN-38 at 1 µM, FL118 effectively inhibited cancer cell growth at less than nM levels in a p53 status-independent manner. Moreover, FL118 selectively inhibited survivin promoter activity and gene expression also in a p53 status-independent manner. Although the survivin promoter-reporter system was used for the identification of FL118, our studies revealed that FL118 not only inhibits survivin expression but also selectively and independently inhibits three additional cancer-associated survival genes (Mcl-1, XIAP and cIAP2) in a p53 status-independent manner, while showing no inhibitory effects on control genes. Genetic silencing or overexpression of FL118 targets demonstrated a role for these targets in FL118's effects. Follow-up in vivo studies revealed that FL118 exhibits superior antitumor efficacy in human tumor xenograft models in comparison with irinotecan, topotecan, doxorubicin, 5-FU, gemcitabine, docetaxel, oxaliplatin, cytoxan and cisplatin, and a majority of mice treated with FL118 showed tumor regression with a weekly × 4 schedule. FL118 induced favorable body-weight-loss profiles (temporary and reversible) and was able to eliminate large tumors. Together, the molecular targeting features of FL118 plus its superior antitumor activity warrant its further development toward clinical trials. PMID:23029106

  11. Concise Palladium-Catalyzed Synthesis of Dibenzodiazepines and Structural Analogs

    E-print Network

    Tsvelikhovsky, Dmitry

    A general and highly efficient protocol for the synthesis of dibenzodiazepines and their structural analogues is reported. In the presence of catalytic quantities of palladium, readily accessible precursors are cross-coupled ...

  12. PLATINUM-GROUP METALS (Platinum, palladium, rhodium, ruthenium, iridium, osmium)

    E-print Network

    Palladium 90 92 84 87 69 Recycling: An estimated 6,000 kilograms of PGM was recovered from new and old scrap. Lower consumption by automobile manufacturers, a slowdown in the electronics sector, and increased

  13. Palladium-based electrocatalysts and fuel cells employing such electrocatalysts

    DOEpatents

    Masel; Richard I. (Champaign, IL), Zhu; Yimin (Urbana, IL), Larsen; Robert T. (Champaign, IL)

    2010-08-31

    A direct organic fuel cell includes a fluid fuel comprising formic acid, an anode having an electrocatalyst comprising palladium nanoparticles, a fluid oxidant, a cathode electrically connected to the anode, and an electrolyte interposed between the anode and the cathode.

  14. Palladium-catalyzed direct arylation of phenols with aryl iodides.

    PubMed

    Long, Rongrong; Yan, Xufei; Wu, Zhiqing; Li, Zhengkai; Xiang, Haifeng; Zhou, Xiangge

    2015-03-11

    An efficient protocol of palladium-catalyzed direct para-arylation of unfunctionalized phenols with aryl iodides under mild conditions was reported. A variety of substrates were applied in this reaction with yields up to 87%. PMID:25686911

  15. The palladium-catalyzed synthesis of organic amines

    E-print Network

    Harris, Michele C., 1975-

    2002-01-01

    Chapter 1. The chelating ligand bis[2-(diphenylphosphino)phenyl] ether (DPEphos), in combination with palladium acetate, forms a highly active catalyst system for the coupling of anilines with aryl bromides. The bisphosphine ...

  16. Palladium-Catalyzed Synthesis of N-Aryl Carbamates

    E-print Network

    Fors, Brett P.

    An efficient synthesis of aryl carbamates was achieved by introducing alcohols into the reaction of palladium-catalyzed cross-coupling of ArX (X = Cl, OTf) with sodium cyanate. The use of aryl triflates as electrophilic ...

  17. PLATINUM-GROUP METALS (Platinum, palladium, rhodium, ruthenium, iridium, osmium)

    E-print Network

    126 PLATINUM-GROUP METALS (Platinum, palladium, rhodium, ruthenium, iridium, osmium) (Data: Platinum 71,500 75,800 77,300 97,200 75,300 Palladium 124,000 146,000 148,000 176,000 195,000 Rhodium 9 26,000 26,700 43,800 36,700 38,900 Rhodium 741 187 282 811 100 Price,2 dollars per troy ounce

  18. PLATINUM-GROUP METALS (Platinum, palladium, rhodium, ruthenium, iridium, osmium)

    E-print Network

    122 PLATINUM-GROUP METALS (Platinum, palladium, rhodium, ruthenium, iridium, osmium) (Data,000 176,000 189,000 147,000 Rhodium 9,650 14,400 13,500 10,500 19,900 Ruthenium 15,600 11,500 8,880 11,300 19,400 32,572 Palladium 26,700 43,800 36,700 44,000 54,900 Rhodium 187 282 811 114 764 Price,2

  19. Catalytic H2O2 decomposition on palladium surfaces

    E-print Network

    Salinas, S. Adriana

    1998-01-01

    CATALYTIC H202 DECOMPOSITION ON PALLADIUM SURFACES A Thesis by S. ADRIANA SALINAS Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE December... 1998 Major Subject: Chemistry CATALYTIC H, O, DECOMPOSITION ON PALLADIUM SURFACES A Thesis S. ADRIANA SALINAS Submitted to Texas A&M University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE Approved as to style...

  20. Hydrogen isotope exchange catalyzed by phosphine complexes of palladium

    Microsoft Academic Search

    V. N. Zudin; V. A. Rogov; V. A. Likholobov; V. A. Shmachkov; L. A. Sazonov; Yu. I. Ermakov

    1985-01-01

    1.Bis(triphenylphosphine)bis(trifluoroacetato)palladium in aqueous solutions of trifluoroacetic acid catalyzes the isotope exchange of hydrogen between dihydrogen and the protons of the solvent.2.Hydrogen exchange proceeds through the formation and decomposition of a hydride complex of palladium, the hydrogen atom in which is capable of exchanging with the protons of the solvent.3.The introduction of ethylene into the system lowers the rate of the

  1. Method of forming supported doped palladium containing oxidation catalysts

    DOEpatents

    Mohajeri, Nahid

    2014-04-22

    A method of forming a supported oxidation catalyst includes providing a support comprising a metal oxide or a metal salt, and depositing first palladium compound particles and second precious metal group (PMG) metal particles on the support while in a liquid phase including at least one solvent to form mixed metal comprising particles on the support. The PMG metal is not palladium. The mixed metal particles on the support are separated from the liquid phase to provide the supported oxidation catalyst.

  2. Excess Power Using Thin Layers of Palladium on Inert Substrates

    Microsoft Academic Search

    E. K. Storms

    2000-01-01

    Excess power produced by thin layers of palladium deposited on various substrates was measured using a double calorimeter consisting of a flow-type and an isoperibolic-type combined. The effects of palladium thickness and impurity deposition were explored. The behavior was correlated with the open-circuit-voltage and the over-voltage of the cathode with respect to a reference electrode external to the D_2O-based electrolytic

  3. Hydrogen in palladium: Anharmonicity of lattice dynamics from first principles

    NASA Astrophysics Data System (ADS)

    Belov, M. P.; Syzdykova, A. B.; Vekilov, Yu. Kh.; Abrikosov, I. A.

    2015-02-01

    The interaction potentials of the palladium and hydrogen sublattices at different hydrogen concentrations have been obtained in terms of the density functional theory and ab initio pseudopotentials. It has been shown that the anharmonicity of this interaction depends on the hydrogen concentration. The phonon spectrum of palladium hydride PdH has been calculated in the harmonic approximation and taking into account the anharmonic effects. The temperature-dependent effective potential technique accounting for the anharmonic effects of lattice vibrations has been described.

  4. Megaplasmid pMP118 of Lactobacillus salivarius

    Microsoft Academic Search

    Paul W. O'Toole; Emma J. Raftis

    \\u000a \\u000a Lactobacillus salivarius UCC118 habours a multiple-replicon genome, including a 242 kb megaplasmid designated pMP118. pMP118 carries a number of contingency\\u000a genes, which work in conjunction with chromosomally encoded genes and pathways to broaden the metabolic flexibility of this\\u000a strain. This increases the potential viability of UCC118 in the competitive environment of the gastrointestinal tract. Annotation\\u000a and functional studies have indicated

  5. 7 CFR 1221.118 - Refund escrow accounts.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ...ORDERS; MISCELLANEOUS COMMODITIES), DEPARTMENT OF AGRICULTURE SORGHUM PROMOTION, RESEARCH, AND INFORMATION ORDER Sorghum Promotion, Research, and Information Order Sorghum Promotion, Research, and Information Board § 1221.118...

  6. 7 CFR 1221.118 - Refund escrow accounts.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ...ORDERS; MISCELLANEOUS COMMODITIES), DEPARTMENT OF AGRICULTURE SORGHUM PROMOTION, RESEARCH, AND INFORMATION ORDER Sorghum Promotion, Research, and Information Order Sorghum Promotion, Research, and Information Board § 1221.118...

  7. 7 CFR 1221.118 - Refund escrow accounts.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ...ORDERS; MISCELLANEOUS COMMODITIES), DEPARTMENT OF AGRICULTURE SORGHUM PROMOTION, RESEARCH, AND INFORMATION ORDER Sorghum Promotion, Research, and Information Order Sorghum Promotion, Research, and Information Board § 1221.118...

  8. 7 CFR 1221.118 - Refund escrow accounts.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ...ORDERS; MISCELLANEOUS COMMODITIES), DEPARTMENT OF AGRICULTURE SORGHUM PROMOTION, RESEARCH, AND INFORMATION ORDER Sorghum Promotion, Research, and Information Order Sorghum Promotion, Research, and Information Board § 1221.118...

  9. The ternary system cerium-palladium-silicon

    NASA Astrophysics Data System (ADS)

    Lipatov, Alexey; Gribanov, Alexander; Grytsiv, Andriy; Rogl, Peter; Murashova, Elena; Seropegin, Yurii; Giester, Gerald; Kalmykov, Konstantin

    2009-09-01

    Phase relations in the ternary system Ce-Pd-Si have been established for the isothermal section at 800 °C based on X-ray powder diffraction and EMPA techniques on about 130 alloys, which were prepared by arc-melting under argon or powder reaction sintering. Eighteen ternary compounds have been observed to participate in the phase equilibria at 800 °C. Atom order was determined by direct methods from X-ray single-crystal counter data for the crystal structures of ?8—Ce 3Pd 4Si 4 (U 3Ni 4Si 4-type, Immm; a=0.41618(1), b=0.42640(1), c=2.45744(7) nm), ?16—Ce 2Pd 14Si (own structure type, P4 /nmm; a=0.88832(2), c=0.69600(2) nm) and also for ?18—CePd 1-xSi x ( x=0.07; FeB-type, Pnma; a=0.74422(5), b=0.45548(3), c=0.58569(4) nm). Rietveld refinements established the atom arrangement in the structures of ?5—Ce 3PdSi 3 (Ba 3Al 2Ge 2-type, Immm; a=0.41207(1), b=0.43026(1), c=1.84069(4) nm) and ?13—Ce 3-xPd 20+xSi 6 (0? x?1, Co 20Al 3B 6-type, Fm3¯ m; a=1.21527(2) nm). The ternary compound Ce 2Pd 3Si 3 (structure-type Ce 2Rh 1.35Ge 4.65, Pmmn; a=0.42040(1), b=0.42247(1), c=1.72444(3) nm) was detected as a high-temperature compound, however, does not participate in the equilibria at 800 °C. Phase equilibria in Ce-Pd-Si are characterized by the absence of cerium solubility in palladium silicides. Mutual solubility among cerium silicides and cerium-palladium compounds are significant whereby random substitution of the almost equally sized atom species palladium and silicon is reflected in extended homogeneous regions at constant Ce-content such as for ?2—Ce(Pd xSi 1-x) 2 (AlB 2-derivative type), ? 6—Ce(Pd xSi 1-x) 2 (ThSi 2-type) and ?7—CePd 2-xSi 2+x. The crystal structures of compounds ?4—Ce ~8Pd ~46Si ~46, ?12—Ce ~29Pd ~49Si ~22, ?15—Ce ~22Pd ~67Si ~11, ?17—Ce ~5Pd ~77Si ~18 and ?18—CePd 1-xSi x ( x~0.1) are still unknown.

  10. Electrocatalysts having platium monolayers on palladium, palladium alloy, and gold alloy core-shell nanoparticles, and uses thereof

    DOEpatents

    Adzic, Radoslav (Setauket, NY); Mo, Yibo (Naperville, IL); Vukmirovic, Miomir (Port Jefferson Station, NY); Zhang, Junliang (Rochester, NY)

    2010-12-21

    The invention relates to platinum-coated particles useful as fuel cell electrocatalysts. The particles are composed of a noble metal or metal alloy core at least partially encapsulated by an atomically thin surface layer of platinum atoms. The invention particularly relates to such particles having a palladium, palladium alloy, gold alloy, or rhenium alloy core encapsulated by an atomic monolayer of platinum. In other embodiments, the invention relates to fuel cells containing these electrocatalysts and methods for generating electrical energy therefrom.

  11. Isotope-selective photoionisation of palladium

    SciTech Connect

    Derzhiev, V I; Dyakin, V M; Il'kaev, R I; Mikhal'tsov, L A; Sapozhkov, A Yu; Selemir, Victor D; Sidorov, I I; Tkachev, Aleksei N; Chaushanskii, S A; Yakovlenko, Sergei I [A.M. Prokhorov General Physics Institute, Russian Academy of Sciences, Moscow (Russian Federation)

    2003-06-30

    A scheme for isotope-selective ionisation of palladium is studied experimentally. A considerable enrichment by the {sup 102}Pd, {sup 104}Pd, and {sup 105}Pd isotopes is achieved. Based on experimental data, the estimate for the hyperfine and isotopic structures of the 4d{sup 9}5p {sup 3}P{sub 1} level is obtained according to which the requirements to laser radiation and the Doppler width of atomic lines providing a high photoionisation selectivity are determined. To obtain a highly enriched (above 50 %) {sup 102}Pd isotope, the spectral width of a laser line (after frequency doubling) should be 60 - 80 MHz, the laser frequency stability (before doubling) should be 20 - 40 MHz, and the width of atomic lines should not exceed 100 MHz. (laser applications and other topics in quantum electronics)

  12. Trinuclear palladium addition to unsaturated carbocycles.

    PubMed

    Murahashi, Tetsuro; Takase, Kohei; Usui, Kentaro; Kimura, Seita; Fujimoto, Mayu; Uemura, Tomohito; Ogoshi, Sensuke; Yamamoto, Koji

    2013-08-01

    The trinuclear palladium addition to monocyclic unsaturated hydrocarbons was revealed. The trinuclear adduct of [2.2]paracyclophane, cycloheptatriene (CHT), or cyclooctatetraene (COT) was obtained by treatment of the corresponding tripalladium sandwich complexes with 3 equiv. of 1,10-phenanthroline. In the trinuclear adduct of [2.2]paracyclophane or CHT, a Pd2 unit and a Pd1 unit synfacially coordinate through a (?-?(3)-allyl):(?(3)-allyl) manner. A trinuclear adduct of COT exhibited an unusual bonding structure in which a formally tetraanionic COT coordinates to three Pd(II) centers through a synfacial ?(3):?(1):?(3):?(1) coordination mode. The tetraanionic COT ligand bearing three Pd(II) moieties undergoes a unique intramolecular 1,5-C-C coupling. PMID:23764564

  13. The Resolution of Important Pharmaceutical Building Blocks by Palladium-Catalyzed Aerobic Oxidation of Secondary Alcohols

    E-print Network

    Stoltz, Brian M.

    The Resolution of Important Pharmaceutical Building Blocks by Palladium-Catalyzed Aerobic Oxidation and Mabel Beckman Laboratories of Chemical Synthesis, Division of Chemistry and Chemical Engineering. Abstract: The palladium-catalyzed aerobic oxidative kinetic resolution of key pharmaceutical building

  14. Palladium-catalyzed substitution of (coumarinyl)methyl acetates with C-, N-, and S-nucleophiles

    E-print Network

    Chattopadhyay, Kalicharan; Fenster, Erik; Grenning, Alexander James; Tunge, Jon A.

    2012-07-27

    The palladium-catalyzed nucleophilic substitution of (coumarinyl)methyl acetates is described. The reaction proceeds though a palladium ?-benzyl-like complex and allows for many different types of C-, N-, and S-nucleophiles ...

  15. 118-B-1 excavation treatability test plan

    SciTech Connect

    Not Available

    1994-07-01

    The Hanford 118-B-1 Burial Ground Treatability Study has been required by milestone change request {number_sign}M-15-93-04, dated September 30, 1993. The change request requires that a treatability test be conducted at the 100-B Area to obtain additional engineering information for remedial design of burial grounds receiving waste from 100 Area removal actions. This treatability study has two purposes: (1) to support development of the Proposed Plan (PP) and Record of Decision (ROD), which will identify the approach to be used for burial ground remediation, and (2) to provide specific engineering information for receiving waste generated from the 100 Area removal actions. Data generated from this test also will provide critical performance and cost information necessary for remedy evaluation in the detailed analysis of alternatives during preparation of the focused feasibility study (FFS). This treatability testing supports the following 100 Area alternatives: (1) excavation and disposal, and (2) excavation, sorting, (treatment), and disposal.

  16. 42 CFR 136.118 - Effect on existing rights.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    42 ? Public Health ? 1 ? 2010-10-01 ? 2010-10-01 ? false ? Effect on existing rights. ? 136.118 ? Section 136.118 ? Public Health ? PUBLIC HEALTH SERVICE, DEPARTMENT OF HEALTH AND HUMAN SERVICES ? INDIAN HEALTH SERVICE, DEPARTMENT OF HEALTH AND HUMAN SERVICES ? INDIAN HEALTH ? Grants...

  17. 33 CFR 118.120 - Radar reflectors and racons.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...2011-07-01 2011-07-01 false Radar reflectors and racons. 118.120 Section...LIGHTING AND OTHER SIGNALS § 118.120 Radar reflectors and racons. The District...require or authorize the installation of radar reflectors and racons on bridge...

  18. 33 CFR 118.120 - Radar reflectors and racons.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...2013-07-01 2013-07-01 false Radar reflectors and racons. 118.120 Section...LIGHTING AND OTHER SIGNALS § 118.120 Radar reflectors and racons. The District...require or authorize the installation of radar reflectors and racons on bridge...

  19. 33 CFR 118.120 - Radar reflectors and racons.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...2014-07-01 2014-07-01 false Radar reflectors and racons. 118.120 Section...LIGHTING AND OTHER SIGNALS § 118.120 Radar reflectors and racons. The District...require or authorize the installation of radar reflectors and racons on bridge...

  20. 33 CFR 118.120 - Radar reflectors and racons.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...2010-07-01 2010-07-01 false Radar reflectors and racons. 118.120 Section...LIGHTING AND OTHER SIGNALS § 118.120 Radar reflectors and racons. The District...require or authorize the installation of radar reflectors and racons on bridge...

  1. 33 CFR 118.120 - Radar reflectors and racons.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...2012-07-01 2012-07-01 false Radar reflectors and racons. 118.120 Section...LIGHTING AND OTHER SIGNALS § 118.120 Radar reflectors and racons. The District...require or authorize the installation of radar reflectors and racons on bridge...

  2. 30 CFR 250.118 - Will MMS approve gas injection?

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...2011-07-01 false Will MMS approve gas injection? 250.118 Section 250...DEPARTMENT OF THE INTERIOR OFFSHORE OIL AND GAS AND SULPHUR OPERATIONS IN THE OUTER CONTINENTAL...Standards § 250.118 Will MMS approve gas injection? The Regional Supervisor...

  3. 30 CFR 250.118 - Will MMS approve gas injection?

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...2010-07-01 false Will MMS approve gas injection? 250.118 Section 250...DEPARTMENT OF THE INTERIOR OFFSHORE OIL AND GAS AND SULPHUR OPERATIONS IN THE OUTER CONTINENTAL...Standards § 250.118 Will MMS approve gas injection? The Regional Supervisor...

  4. The ITEA-NASA STS-118 Design Challenges

    ERIC Educational Resources Information Center

    Meade, Shelli D.; Caron, Daniel W.; Gray, Aaron; Weaver, Kim

    2008-01-01

    In conjunction with the August 8, 2007 launch of STS-118, the International Technology Education Association (ITEA) and National Aeronautics and Space Administration (NASA) developed and recently debuted curricular units for Grades K-12 on Space Exploration, known as STS-118 Design Challenges. The units focus on aspects of the themes that NASA…

  5. Thermosonic gold wire bonding to laminate substrates with palladium surface finishes

    Microsoft Academic Search

    R. Wayne Johnson; Michael J. Palmer; Michael J. Bozack; Tamara Isaacs-Smith

    1999-01-01

    As the laminate substrate industry moves from hot air solder level (HASL) finishes, alternate plating finishes are being proposed such as immersion gold\\/electroless nickel, electroless palladium, and electroless silver. This paper presents results of an evaluation of the thermosonic gold ball wire bondability of electroless palladium. Two palladium thicknesses, with and without a nickel underlayer, were evaluated from two vendors.

  6. Palladium with a Thin Gold Layer as a Sliding Contact Material

    Microsoft Academic Search

    TAKEHIKO SATO; YUJI MATSUI; MASANORI OKADA; KYOHEI MURAKAWA; ZENZO HENMI

    1981-01-01

    A study has been carried out to evaluate two types of palladium contacts as a substitute for gold contacts presently used in connectors. Both types are electroplated palladium, one with a thin gold layer over it and the other without, Platings in this experiment were pure palladium from an alkaline bath (pH = 8.8) and pure gold from an acid

  7. Atomic-scale studies on the growth of palladium and titanium on GaN(0001)

    E-print Network

    Castell, Martin

    Atomic-scale studies on the growth of palladium and titanium on GaN(0001) C. No¨renberg a,b,*, M nitride; Palladium; Titanium; Alloys; Epitaxy; Metal­semiconductor interfaces; Nanostructures; Scanning;Here, we have focused on atomic-scale studies of the ini- tial growth stages of palladium and titanium

  8. The influence of laser wavelength and fluence on palladium nanoparticles produced by pulsed laser ablation in deionized water

    NASA Astrophysics Data System (ADS)

    Kim, Jinil; Amaranatha Reddy, D.; Ma, Rory; Kim, Tae Kyu

    2014-11-01

    Homogeneous spherical palladium (Pd) nanoparticles were synthesized by pulsed laser ablation of a solid Pd foil target submerged in deionized water, without the addition of any external chemical surfactant. The influence of laser wavelength (355, 532, and 1064 nm) and fluence (8.92, 12.74, and 19.90 J/cm2) on nucleation, growth, and aggregation of Pd nanoparticles were systematically studied. Microstructural and optical properties of the obtained nanoparticles were studied by field emission transmission electron microscopy (FETEM), energy dispersive X-ray spectroscopy, and UV-vis spectroscopy. FETEM micrographs indicate that the average nanocrystallite sizes are relatively low (3-6 nm) and homogeneous for the particles synthesized at the laser wavelengths of 355 and 532 nm. However, at a laser wavelength of 1064 nm, the average nanocrystallite size is relatively large and inhomogeneous in nature. Moreover, we observe that the mean diameter and production rate of particles increases with an increase in laser fluence. The selected area electron diffraction patterns obtained from isolated Pd nanoparticles show the characteristic diffused electron diffraction rings of polycrystalline materials with a face-centered cubic structure. Absorbance spectrum of the synthesized nanoparticle solution shows a broad absorption band, which corresponds to a typical inter-band transition of a metallic system, indicating the production of pure palladium nanoparticles. The present work provides new insights into the effect of laser wavelength and fluence on the control of size and aggregation of palladium nanoparticles in the liquid medium.

  9. 41 CFR 102-118.40 - How does my agency order transportation and transportation services?

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ...2014-01-01 false How does my agency order transportation and transportation services? 102-118.40 Section 102-118...Continued) FEDERAL MANAGEMENT REGULATION TRANSPORTATION 118-TRANSPORTATION PAYMENT AND AUDIT...

  10. 41 CFR 102-118.40 - How does my agency order transportation and transportation services?

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...2013-07-01 false How does my agency order transportation and transportation services? 102-118.40 Section 102-118...Continued) FEDERAL MANAGEMENT REGULATION TRANSPORTATION 118-TRANSPORTATION PAYMENT AND AUDIT...

  11. 41 CFR 102-118.40 - How does my agency order transportation and transportation services?

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ...2012-01-01 false How does my agency order transportation and transportation services? 102-118.40 Section 102-118...Continued) FEDERAL MANAGEMENT REGULATION TRANSPORTATION 118-TRANSPORTATION PAYMENT AND AUDIT...

  12. 33 CFR 118.95 - Lights on structures not part of a bridge or approach structure.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...2010-07-01 false Lights on structures not part of a bridge or approach structure. 118.95 Section 118.95...Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY BRIDGES BRIDGE LIGHTING AND OTHER SIGNALS § 118.95 Lights...

  13. 21 CFR 118.7 - Sampling methodology for Salmonella Enteritidis (SE).

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 2 2010-04-01 2010-04-01 false Sampling methodology for Salmonella Enteritidis (SE). 118.7 Section 118...AND TRANSPORTATION OF SHELL EGGS § 118.7 Sampling methodology for Salmonella Enteritidis (SE). (a)...

  14. 21 CFR 118.8 - Testing methodology for Salmonella Enteritidis (SE).

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ...Drugs 2 2010-04-01 2010-04-01 false Testing methodology for Salmonella Enteritidis (SE). 118.8 Section 118...STORAGE, AND TRANSPORTATION OF SHELL EGGS § 118.8 Testing methodology for Salmonella Enteritidis (SE). (a) Testing of...

  15. 41 CFR 102-118.435 - What procedures does GSA use to perform a postpayment audit?

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...use to perform a postpayment audit? 102-118.435 Section...Property Management Regulations System (Continued) FEDERAL MANAGEMENT...118-TRANSPORTATION PAYMENT AND AUDIT Postpayment Transportation Audits § 102-118.435...

  16. 41 CFR 102-118.265 - What is a prepayment audit?

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... false What is a prepayment audit? 102-118.265 Section 102-118...Property Management Regulations System (Continued) FEDERAL MANAGEMENT...118-TRANSPORTATION PAYMENT AND AUDIT Prepayment Audits of Transportation Services...

  17. 21 CFR 118.9 - Administration of the Salmonella Enteritidis (SE) prevention plan.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ...2010-04-01 false Administration of the Salmonella Enteritidis (SE) prevention plan. 118.9 Section 118...SHELL EGGS § 118.9 Administration of the Salmonella Enteritidis (SE) prevention plan. You must...

  18. 21 CFR 118.5 - Environmental testing for Salmonella Enteritidis (SE).

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ...2010-04-01 false Environmental testing for Salmonella Enteritidis (SE). 118.5 Section 118.5 Food and...SHELL EGGS § 118.5 Environmental testing for Salmonella Enteritidis (SE). (a) Environmental testing when...

  19. 7 CFR 1c.118 - Applications and proposals lacking definite plans for involvement of human subjects.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ...lacking definite plans for involvement of human subjects. 1c.118 Section 1c.118...Secretary of Agriculture PROTECTION OF HUMAN SUBJECTS § 1c.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

  20. 15 CFR 27.118 - Applications and proposals lacking definite plans for involvement of human subjects.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ...lacking definite plans for involvement of human subjects. 27.118 Section 27.118...the Secretary of Commerce PROTECTION OF HUMAN SUBJECTS § 27.118 Applications and...lacking definite plans for involvement of human subjects. Certain types...

  1. 28 CFR 46.118 - Applications and proposals lacking definite plans for involvement of human subjects.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...lacking definite plans for involvement of human subjects. 46.118 Section 46.118...OF JUSTICE (CONTINUED) PROTECTION OF HUMAN SUBJECTS § 46.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

  2. 28 CFR 46.118 - Applications and proposals lacking definite plans for involvement of human subjects.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...lacking definite plans for involvement of human subjects. 46.118 Section 46.118...OF JUSTICE (CONTINUED) PROTECTION OF HUMAN SUBJECTS § 46.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

  3. 38 CFR 16.118 - Applications and proposals lacking definite plans for involvement of human subjects.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...lacking definite plans for involvement of human subjects. 16.118 Section 16.118...DEPARTMENT OF VETERANS AFFAIRS PROTECTION OF HUMAN SUBJECTS § 16.118 Applications and...lacking definite plans for involvement of human subjects. Certain types...

  4. 49 CFR 11.118 - Applications and proposals lacking definite plans for involvement of human subjects.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ...lacking definite plans for involvement of human subjects. 11.118 Section 11.118...Secretary of Transportation PROTECTION OF HUMAN SUBJECTS § 11.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

  5. 49 CFR 11.118 - Applications and proposals lacking definite plans for involvement of human subjects.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ...lacking definite plans for involvement of human subjects. 11.118 Section 11.118...Secretary of Transportation PROTECTION OF HUMAN SUBJECTS § 11.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

  6. 38 CFR 16.118 - Applications and proposals lacking definite plans for involvement of human subjects.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...lacking definite plans for involvement of human subjects. 16.118 Section 16.118...DEPARTMENT OF VETERANS AFFAIRS PROTECTION OF HUMAN SUBJECTS § 16.118 Applications and...lacking definite plans for involvement of human subjects. Certain types...

  7. 15 CFR 27.118 - Applications and proposals lacking definite plans for involvement of human subjects.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ...lacking definite plans for involvement of human subjects. 27.118 Section 27.118...the Secretary of Commerce PROTECTION OF HUMAN SUBJECTS § 27.118 Applications and...lacking definite plans for involvement of human subjects. Certain types...

  8. 49 CFR 11.118 - Applications and proposals lacking definite plans for involvement of human subjects.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ...lacking definite plans for involvement of human subjects. 11.118 Section 11.118...Secretary of Transportation PROTECTION OF HUMAN SUBJECTS § 11.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

  9. 15 CFR 27.118 - Applications and proposals lacking definite plans for involvement of human subjects.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ...lacking definite plans for involvement of human subjects. 27.118 Section 27.118...the Secretary of Commerce PROTECTION OF HUMAN SUBJECTS § 27.118 Applications and...lacking definite plans for involvement of human subjects. Certain types...

  10. 7 CFR 1c.118 - Applications and proposals lacking definite plans for involvement of human subjects.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ...lacking definite plans for involvement of human subjects. 1c.118 Section 1c.118...Secretary of Agriculture PROTECTION OF HUMAN SUBJECTS § 1c.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

  11. 49 CFR 11.118 - Applications and proposals lacking definite plans for involvement of human subjects.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...lacking definite plans for involvement of human subjects. 11.118 Section 11.118...Secretary of Transportation PROTECTION OF HUMAN SUBJECTS § 11.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

  12. 7 CFR 1c.118 - Applications and proposals lacking definite plans for involvement of human subjects.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ...lacking definite plans for involvement of human subjects. 1c.118 Section 1c.118...Secretary of Agriculture PROTECTION OF HUMAN SUBJECTS § 1c.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

  13. 7 CFR 1c.118 - Applications and proposals lacking definite plans for involvement of human subjects.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ...lacking definite plans for involvement of human subjects. 1c.118 Section 1c.118...Secretary of Agriculture PROTECTION OF HUMAN SUBJECTS § 1c.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

  14. 15 CFR 27.118 - Applications and proposals lacking definite plans for involvement of human subjects.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ...lacking definite plans for involvement of human subjects. 27.118 Section 27.118...the Secretary of Commerce PROTECTION OF HUMAN SUBJECTS § 27.118 Applications and...lacking definite plans for involvement of human subjects. Certain types...

  15. 38 CFR 16.118 - Applications and proposals lacking definite plans for involvement of human subjects.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...lacking definite plans for involvement of human subjects. 16.118 Section 16.118...DEPARTMENT OF VETERANS AFFAIRS PROTECTION OF HUMAN SUBJECTS § 16.118 Applications and...lacking definite plans for involvement of human subjects. Certain types...

  16. 49 CFR 11.118 - Applications and proposals lacking definite plans for involvement of human subjects.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ...lacking definite plans for involvement of human subjects. 11.118 Section 11.118...Secretary of Transportation PROTECTION OF HUMAN SUBJECTS § 11.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

  17. 38 CFR 16.118 - Applications and proposals lacking definite plans for involvement of human subjects.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...lacking definite plans for involvement of human subjects. 16.118 Section 16.118...DEPARTMENT OF VETERANS AFFAIRS PROTECTION OF HUMAN SUBJECTS § 16.118 Applications and...lacking definite plans for involvement of human subjects. Certain types...

  18. 28 CFR 46.118 - Applications and proposals lacking definite plans for involvement of human subjects.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...lacking definite plans for involvement of human subjects. 46.118 Section 46.118...OF JUSTICE (CONTINUED) PROTECTION OF HUMAN SUBJECTS § 46.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

  19. 38 CFR 16.118 - Applications and proposals lacking definite plans for involvement of human subjects.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...lacking definite plans for involvement of human subjects. 16.118 Section 16.118...DEPARTMENT OF VETERANS AFFAIRS PROTECTION OF HUMAN SUBJECTS § 16.118 Applications and...lacking definite plans for involvement of human subjects. Certain types...

  20. 7 CFR 1c.118 - Applications and proposals lacking definite plans for involvement of human subjects.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ...lacking definite plans for involvement of human subjects. 1c.118 Section 1c.118...Secretary of Agriculture PROTECTION OF HUMAN SUBJECTS § 1c.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

  1. 28 CFR 46.118 - Applications and proposals lacking definite plans for involvement of human subjects.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...lacking definite plans for involvement of human subjects. 46.118 Section 46.118...OF JUSTICE (CONTINUED) PROTECTION OF HUMAN SUBJECTS § 46.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

  2. 28 CFR 46.118 - Applications and proposals lacking definite plans for involvement of human subjects.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...lacking definite plans for involvement of human subjects. 46.118 Section 46.118...OF JUSTICE (CONTINUED) PROTECTION OF HUMAN SUBJECTS § 46.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

  3. 15 CFR 27.118 - Applications and proposals lacking definite plans for involvement of human subjects.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ...lacking definite plans for involvement of human subjects. 27.118 Section 27.118...the Secretary of Commerce PROTECTION OF HUMAN SUBJECTS § 27.118 Applications and...lacking definite plans for involvement of human subjects. Certain types...

  4. 27 CFR 20.118 - Rubbing alcohol general-use formula.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... false Rubbing alcohol general-use formula. 20.118 Section 20.118 Alcohol...DISTRIBUTION AND USE OF DENATURED ALCOHOL AND RUM Formulas and Statements of Process General-Use Formulas § 20.118 Rubbing alcohol...

  5. 27 CFR 20.118 - Rubbing alcohol general-use formula.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... false Rubbing alcohol general-use formula. 20.118 Section 20.118 Alcohol...DISTRIBUTION AND USE OF DENATURED ALCOHOL AND RUM Formulas and Statements of Process General-Use Formulas § 20.118 Rubbing alcohol...

  6. 27 CFR 20.118 - Rubbing alcohol general-use formula.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... false Rubbing alcohol general-use formula. 20.118 Section 20.118 Alcohol...DISTRIBUTION AND USE OF DENATURED ALCOHOL AND RUM Formulas and Statements of Process General-Use Formulas § 20.118 Rubbing alcohol...

  7. 27 CFR 20.118 - Rubbing alcohol general-use formula.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... false Rubbing alcohol general-use formula. 20.118 Section 20.118 Alcohol...DISTRIBUTION AND USE OF DENATURED ALCOHOL AND RUM Formulas and Statements of Process General-Use Formulas § 20.118 Rubbing alcohol...

  8. 27 CFR 20.118 - Rubbing alcohol general-use formula.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... false Rubbing alcohol general-use formula. 20.118 Section 20.118 Alcohol...DISTRIBUTION AND USE OF DENATURED ALCOHOL AND RUM Formulas and Statements of Process General-Use Formulas § 20.118 Rubbing alcohol...

  9. Modulation of CdSe fluorescence using palladium nanoparticles

    NASA Astrophysics Data System (ADS)

    Major, Kevin J.; Jones, Marcus

    2011-10-01

    The increasing demand for clean, efficient energy has strongly influenced the direction of nanoscale research. One of the most promising areas of solar energy production lies with cadmium selenide quantum dots (CdSe QDs). As a means to improve the efficiency of solar energy conversion in QDs, metal nanoparticles have been examined. It has been shown that in certain systems the presence of these metal nanoparticles increase electron - hole charge separation thus providing extended times for electron harvesting. Most of the systems currently explored utilize gold nanoparticles, which is unsurprising due to the vast amount of synthetic methods for these particles and their plasmonic effects on the QDs. We seek to further examine these unique metal nanoparticle -quantum dot interactions through the study of CdSe QD - palladium nanoparticle systems. We employ both steady-state and time resolved ensemble fluorescence spectroscopy to observe the effects of increasing palladium nanoparticle concentrations on both the fluorescence intensity and lifetime of various CdSe QDs. We find that decreasing separation distance between the particles through increasing palladium concentration, leads to a stronger interaction between the particles. We find expected fluorescence quenching of the QDs at higher concentrations of palladium. At low palladium concentrations however we observe a unique fluorescence enhancement of the QDs. We use this data to explore the relative contributions of energy and electron transfer between the particles and determine the conditions under which the maximum effects of these interactions are observed.

  10. Size-Dependent Antimicrobial Effects of Novel Palladium Nanoparticles

    PubMed Central

    Adams, Clara P.; Walker, Katherine A.; Obare, Sherine O.; Docherty, Kathryn M.

    2014-01-01

    Investigating the interactions between nanoscale materials and microorganisms is crucial to provide a comprehensive, proactive understanding of nanomaterial toxicity and explore the potential for novel applications. It is well known that nanomaterial behavior is governed by the size and composition of the particles, though the effects of small differences in size toward biological cells have not been well investigated. Palladium nanoparticles (Pd NPs) have gained significant interest as catalysts for important carbon-carbon and carbon-heteroatom reactions and are increasingly used in the chemical industry, however, few other applications of Pd NPs have been investigated. In the present study, we examined the antimicrobial capacity of Pd NPs, which provides both an indication of their usefulness as target antimicrobial compounds, as well as their potency as potential environmental pollutants. We synthesized Pd NPs of three different well-constrained sizes, 2.0±0.1 nm, 2.5±0.2 nm and 3.1±0.2 nm. We examined the inhibitory effects of the Pd NPs and Pd2+ ions toward gram negative Escherichia coli (E. coli) and gram positive Staphylococcus aureus (S. aureus) bacterial cultures throughout a 24 hour period. Inhibitory growth effects of six concentrations of Pd NPs and Pd2+ ions (2.5×10?4, 10?5, 10?6, 10?7, 10?8, and 10?9 M) were examined. Our results indicate that Pd NPs are generally much more inhibitory toward S. aureus than toward E. coli, though all sizes are toxic at ?10?5 M to both organisms. We observed a significant difference in size-dependence of antimicrobial activity, which differed based on the microorganism tested. Our work shows that Pd NPs are highly antimicrobial, and that fine-scale (<1 nm) differences in size can alter antimicrobial activity. PMID:24465824

  11. Spectroscopic Ellipsometry of Palladium Thin Films.

    NASA Astrophysics Data System (ADS)

    Sullivan, Brian Thomas

    Spectroscropic ellipsometry is a nondestructive, ambient surface analysis technique for studying surfaces, interfaces and thin films. To take advantage of this method an automatic spectroscopic ellipsometer was designed and constructed for the microstructural characterization of thin films. This high precision instrument is capable of measuring in real-time the optical properties of bulk or thin film materials over the visible-UV region (1.5 -6.0 eV). The microstructure of thin films can then be determined from an effective medium analysis of the spectroellipsometric data to investigate how the film morphology is influenced by the film preparation conditions. In this thesis the pseudodielectric function of palladium films prepared by dc planar magentron sputtering was measured while the substrate temperature, argon partial pressure and rf-induced substrate bias were varied independently during deposition. Through spectroellipsometry, the evolution of the microstructure of the films was correlated to the changing deposition environment. The film data are in excellent agreement with the effective medium theory of Sen, Scala, and Cohen, relevant for a random coated-particle microstructure where the grains are optically isolated from each other, and which had been previously applied to only rhodium films. A microstructural analysis indicated a general trend towards increased porosity and microroughness of the films with higher argon pressures and substrate temperatures. The films deposited above a transition pressure of 15 mTorr were best described optically by a random coated -particle microstructure and electron microscopy confirmed the isolation of grains by void boundaries. With increasing rf-induced substrate biasing, the Pd film microstructure was modified in a manner similar to that obtained by varying the substrate temperature alone. The measured deposition rate while bias sputtering was significantly higher than that expected based upon the measured resputtering rate and several mechanisms were proposed to account for the enhancement in the deposition rate. The films were best characterized by a 2-dimensional isotropy which was supported by the columnar nature of the films observed by electron microscopy. Finally, the dielectric function of the "best" palladium film was compared to optical constants of Pd previously reported in the literature for bulk and thin film specimens.

  12. Development and bioorthogonal activation of palladium-labile prodrugs of gemcitabine.

    PubMed

    Weiss, Jason T; Dawson, John C; Fraser, Craig; Rybski, Witold; Torres-Sánchez, Carmen; Bradley, Mark; Patton, E Elizabeth; Carragher, Neil O; Unciti-Broceta, Asier

    2014-06-26

    Bioorthogonal chemistry has become one of the main driving forces in current chemical biology, inspiring the search for novel biocompatible chemospecific reactions for the past decade. Alongside the well-established labeling strategies that originated the bioorthogonal paradigm, we have recently proposed the use of heterogeneous palladium chemistry and bioorthogonal Pd(0)-labile prodrugs to develop spatially targeted therapies. Herein, we report the generation of biologically inert precursors of cytotoxic gemcitabine by introducing Pd(0)-cleavable groups in positions that are mechanistically relevant for gemcitabine's pharmacological activity. Cell viability studies in pancreatic cancer cells showed that carbamate functionalization of the 4-amino group of gemcitabine significantly reduced (>23-fold) the prodrugs' cytotoxicity. The N-propargyloxycarbonyl (N-Poc) promoiety displayed the highest sensitivity to heterogeneous palladium catalysis under biocompatible conditions, with a reaction half-life of less than 6 h. Zebrafish studies with allyl, propargyl, and benzyl carbamate-protected rhodamines confirmed N-Poc as the most suitable masking group for implementing in vivo bioorthogonal organometallic chemistry. PMID:24867590

  13. Superconductivity and the structural phase transitions in palladium hydride and palladium deuteride

    SciTech Connect

    Standley, Robert Wendell

    1980-01-01

    The results of two experimental studies of the superconducting transition temperature, T/sub c/, of palladium hydride, PdH/sub x/, and palladium deuteride, PdD/sub x/, are presented. In the first study, the superconducting transition temperature of PdH/sub x/(D/sub x/) is studied as a function of H(D) concentration, x, in the temperature range from 0.2 K to 4K. The data join smoothly with those reported previously by Miller and Satterthwaite at higher temperatures, and the composite data are described by the empirical relation T/sub c/ = 150.8 (x-x/sub o/)/sup 2/ /sup 244/, where x/sub o/ = 0.715 for hydride samples and 0.668 for deuteride samples. The results, when compared with the theoretical predictions of Klein and Papaconstantopoulos, et al., raise questions about the validity of their explanation of the reverse isotope effect, which is based solely on a difference in force constants. In the second study, the effect of the order-disorder structural transition associated with the 50 K anomaly on the superconductivity of PdH/sub x/(D/sub x/) is investigated. Samples were quenched to low temperatures in the disordered state, and their transition temperatures measured. The samples were then annealed just below the anomaly temperature, and the ordering process followed by monitoring the change in sample resistance. The transition temperatures in the ordered state were then measured.

  14. Palladium exposure of barley: uptake and effects.

    PubMed

    Battke, F; Leopold, K; Maier, M; Schmidhalter, U; Schuster, M

    2008-03-01

    Motor vehicles are now equipped with exhaust gas catalytic converters containing rare metals, such as palladium (Pd), platinum and rhodium, as catalytic active materials, leading to significantly increased emission of these metals. Compared with platinum and rhodium, low concentrations of Pd have been shown to have more serious effects on cells and organisms. In the present study, uptake of Pd by barley and behaviour of Pd nanoparticles in nutrient solutions used to grow plants were observed in order to develop a model of Pd exposure of plant systems. Pd determination was performed using a selective separation and pre-concentration procedure, which was further developed for this study, and coupled to graphite furnace atomic absorption spectrometry. The results show that uptake of Pd depends on Pd particle diameter. Compared to other toxic metals, like mercury, Pd causes stress effects in leaves at lower concentrations in nutrient solutions. Furthermore, Pd particles are dissolved at different rates, depending on size, in the nutrient solution during plant growth. PMID:18304202

  15. Superlattices of platinum and palladium nanoparticles

    SciTech Connect

    MARTIN,JAMES E.; WILCOXON,JESS P.; ODINEK,JUDY G.; PROVENCIO,PAULA P.

    2000-04-06

    The authors have used a nonionic inverse micelle synthesis technique to form nanoclusters of platinum and palladium. These nanoclusters can be rendered hydrophobic or hydrophilic by the appropriate choice of capping ligand. Unlike Au nanoclusters, Pt nanoclusters show great stability with thiol ligands in aqueous media. Alkane thiols, with alkane chains ranging from C{sub 6} to C{sub 18} were used as hydrophobic ligands, and with some of these they were able to form 2-D and/or 3-D superlattices of Pt nanoclusters as small as 2.7 nm in diameter. Image processing techniques were developed to reliably extract from transmission electron micrographs (TEMs) the particle size distribution, and information about the superlattice domains and their boundaries. The latter permits one to compute the intradomain vector pair correlation function of the particle centers, from which they can accurately determine the lattice spacing and the coherent domain size. From these data the gap between the particles in the coherent domains can be determined as a function of the thiol chain length. It is found that as the thiol chain length increases, the gaps between particles within superlattice domains increases, but more slowly than one might expect, possibly indicating thiol chain interdigitation.

  16. 18 CFR 11.8 - Adjustment of annual charges.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ...FEDERAL POWER ACT Charges for Costs of Administration, Use of Tribal Lands and Other Government Lands, and Use of Government Dams § 11.8 Adjustment of annual charges. All annual charges imposed under this subpart continue in effect as fixed...

  17. 18 CFR 11.8 - Adjustment of annual charges.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ...FEDERAL POWER ACT Charges for Costs of Administration, Use of Tribal Lands and Other Government Lands, and Use of Government Dams § 11.8 Adjustment of annual charges. All annual charges imposed under this subpart continue in effect as fixed...

  18. 18 CFR 11.8 - Adjustment of annual charges.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ...FEDERAL POWER ACT Charges for Costs of Administration, Use of Tribal Lands and Other Government Lands, and Use of Government Dams § 11.8 Adjustment of annual charges. All annual charges imposed under this subpart continue in effect as fixed...

  19. 18 CFR 11.8 - Adjustment of annual charges.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ...FEDERAL POWER ACT Charges for Costs of Administration, Use of Tribal Lands and Other Government Lands, and Use of Government Dams § 11.8 Adjustment of annual charges. All annual charges imposed under this subpart continue in effect as fixed...

  20. 27 CFR 479.118 - Proof of exportation.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ...Firearms BUREAU OF ALCOHOL, TOBACCO, FIREARMS, AND EXPLOSIVES, DEPARTMENT OF JUSTICE FIREARMS AND AMMUNITION MACHINE GUNS, DESTRUCTIVE DEVICES, AND CERTAIN OTHER FIREARMS Importation and Exportation Exportation § 479.118 Proof of...

  1. 27 CFR 479.118 - Proof of exportation.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ...Firearms BUREAU OF ALCOHOL, TOBACCO, FIREARMS, AND EXPLOSIVES, DEPARTMENT OF JUSTICE FIREARMS AND AMMUNITION MACHINE GUNS, DESTRUCTIVE DEVICES, AND CERTAIN OTHER FIREARMS Importation and Exportation Exportation § 479.118 Proof of...

  2. 27 CFR 479.118 - Proof of exportation.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ...Firearms BUREAU OF ALCOHOL, TOBACCO, FIREARMS, AND EXPLOSIVES, DEPARTMENT OF JUSTICE FIREARMS AND AMMUNITION MACHINE GUNS, DESTRUCTIVE DEVICES, AND CERTAIN OTHER FIREARMS Importation and Exportation Exportation § 479.118 Proof of...

  3. 27 CFR 479.118 - Proof of exportation.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ...Firearms BUREAU OF ALCOHOL, TOBACCO, FIREARMS, AND EXPLOSIVES, DEPARTMENT OF JUSTICE FIREARMS AND AMMUNITION MACHINE GUNS, DESTRUCTIVE DEVICES, AND CERTAIN OTHER FIREARMS Importation and Exportation Exportation § 479.118 Proof of...

  4. 27 CFR 479.118 - Proof of exportation.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ...Firearms BUREAU OF ALCOHOL, TOBACCO, FIREARMS, AND EXPLOSIVES, DEPARTMENT OF JUSTICE FIREARMS AND AMMUNITION MACHINE GUNS, DESTRUCTIVE DEVICES, AND CERTAIN OTHER FIREARMS Importation and Exportation Exportation § 479.118 Proof of...

  5. 118. Photographic copy of historic photo, April 5, 1932 (original ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    118. Photographic copy of historic photo, April 5, 1932 (original print filed in Record Group 115, National Archives, Washington, D.C.). INVAR VOLUME METER, PANEL NO. 3, OWYHEE DAM. - Owyhee Dam, Across Owyhee River, Nyssa, Malheur County, OR

  6. 37 CFR 11.118 - Duties to prospective client.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...Rules of Professional Conduct Client-Practitioner Relationship § 11.118 Duties to... (a) A person who discusses with a practitioner the possibility of forming a client-practitioner relationship with respect to a...

  7. 37 CFR 11.118 - Duties to prospective client.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...Rules of Professional Conduct Client-Practitioner Relationship § 11.118 Duties to... (a) A person who discusses with a practitioner the possibility of forming a client-practitioner relationship with respect to a...

  8. 44 CFR 206.118 - Disposal of housing units.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    44 Emergency Management and Assistance...118 Emergency Management and Assistance FEDERAL EMERGENCY MANAGEMENT AGENCY, DEPARTMENT...insurance, as well as flood insurance on the...necessary to protect health or safety,...

  9. 44 CFR 206.118 - Disposal of housing units.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    44 Emergency Management and Assistance...118 Emergency Management and Assistance FEDERAL EMERGENCY MANAGEMENT AGENCY, DEPARTMENT...insurance, as well as flood insurance on the...necessary to protect health or safety,...

  10. 29 CFR 570.118 - Sixteen-year minimum.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...minimum for employment in manufacturing or mining occupations. Furthermore, this age...the convenience of the user, the revised text is set forth as follows: § 570.118...minimum for employment in manufacturing or mining occupations, although under FLSA...

  11. 24 CFR 943.118 - What is a consortium?

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ...PUBLIC HOUSING AGENCY CONSORTIA AND JOINT VENTURES Consortia § 943.118 What...agreement. A consortium also submits a joint PHA Plan. The lead agency collects...for submission and review of the joint PHA Plan are the same....

  12. 50 CFR 216.118 - Renewal of Letters of Authorization.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... REGULATIONS GOVERNING THE TAKING AND IMPORTING OF MARINE MAMMALS Taking Marine Mammals Incidental to Coastal Commercial Fireworks Displays at Monterey Bay National Marine Sanctuary, CA § 216.118 Renewal of Letters of Authorization. (a) A...

  13. NOAA Technical Report NMFS 118 Pictorial Guide to the Groupers

    E-print Network

    subcategories of the Technical Report series: "Special Scientific Report- Fisheries" and "Circular." CopiesNOAA Technical Report NMFS 118 Pictorial Guide to the Groupers (Teleostei: Serranidae A. Schmitten Assistant Administrator for Fisheries The NOAA Technical Report NMFS (ISSN 0892

  14. 118. Guillotine type gate (in open position) to regulate stove ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    118. Guillotine type gate (in open position) to regulate stove exhausts to underground flue. - Sloss-Sheffield Steel & Iron, First Avenue North Viaduct at Thirty-second Street, Birmingham, Jefferson County, AL

  15. On the corrosion behavior and biocompatibility of palladium-based dental alloys

    NASA Astrophysics Data System (ADS)

    Sun, Desheng

    Palladium-based alloys have been used as dental restorative materials for about two decades with good clinical history. But there have been clinical case reports showing possible allergy effects from these alloys. The aim of this study was to characterize the corrosion behavior and mechanisms of several palladium-based dental alloys by potentiodynamic polarization methods, electrochemical impedance spectroscopy (EIS), and scanning Kelvin probe force microscopy/atomic force microscopy (SKPFM/AFM), and to evaluate their biocompatibility by a cell culture technique and an animal model. Using SKPFM/AFM and scanning electron microscopy, the Ru-enriched phase from the use of ruthenium as a grain-refining element was identified as being slightly more noble than the palladium solid solution matrix in a high-palladium alloy. Other secondary precipitates that exist in the microstructures of these high-palladium alloys have minimal differences in Volta potential compared to the matrix. For high-palladium alloys, corrosion is generally uniform due to the predominant palladium content in the different phases. Potentiodynamic polarization and EIS have shown that representative palladium-silver alloys have low corrosion tendency and high corrosion resistance, which are equivalent to a well-known high-noble gold-palladium alloy in simulated body fluid and oral environments. The palladium-silver alloys tested are resistant to chloride ion corrosion. Passivation and dealloying have been identified for all of the tested palladium-silver alloys. The great similarity in corrosion behavior among the palladium-silver alloys is attributed to their similar chemical compositions. The variation in microstructures of palladium-silver alloys tested does not cause significant difference in corrosion behavior. The corrosion resistance of these palladium-silver alloys at elevated potentials relevant to oral environment is still satisfactory. The release of elements from representative dental palladium alloys into cell culture media did not significantly affect the proliferation and viability of human fibroblast cells. Subcutaneous implantation of samples of one high-palladium alloy, one palladium-silver alloy and a gold alloy into mice did not cause any significant histological change in their skin and spleen. The presence of an oxide layer from dental laboratory processing of these alloys did not cause any adverse reactions from the cells or animals. The biocompatibility of the dental palladium-based alloys evaluated by the cell culture and animal models is satisfactory, suggesting that these alloys are safe for clinical usage.

  16. Palladium catalyzed heck arylation of 2,3-dihydrofuran-effect of the palladium precursor.

    PubMed

    Morel, Adam; Trzeciak, Anna M; Pernak, Juliusz

    2014-01-01

    Heck arylation of 2,3-dihydrofuran with iodobenzene was carried out in systems consisting of different palladium precursors (Pd2(dba)3, Pd(acac)2, PdCl2(cod), [PdCl(allyl)]2, PdCl2(PhCN)2, PdCl2(PPh3)2) and ionic liquids (CILs) with L-prolinate or L-lactate anions. All the tested CILs caused remarkable increases of the conversion values and in all of the reactions 2-phenyl-2,3-dihydrofuran (3) was obtained as the main product with a yield of up to 59.2%. The highest conversions of iodobenzene were achieved for the [PdCl(allyl)]2 precursor. Formation of Pd(0) nanoparticles, representing the resting state of the catalyst, was evidenced by TEM. PMID:24950443

  17. Phosphorylation of histone H3(T118) alters nucleosome dynamics and remodeling

    E-print Network

    Poirier, Michael

    remodeling (15). A Saccharomyces cerevisiae genetic screen identified H3(T118I) as a SWI/SNF independent (Sin processes. Histone H3(T118) is a site of phosphorylation [H3(T118ph)] and is implicated in regulation of tran- scription and DNA repair. We prepared H3(T118ph) by expressed protein ligation and determined its

  18. Effect of palladium on the corrosion behavior of titanium

    Microsoft Academic Search

    C. S. Brossia; G. A. Cragnolino

    2004-01-01

    The effects of palladium (Pd) additions on the localized and uniform corrosion of titanium (Ti) were examined by comparing the corrosion behavior of Ti Grade 2 (UNS R50400) to that of Pd-bearing Ti Grade 7 (UNS R52400). Pd additions were found to increase the pitting (Epit) and repassivation (Erp) potentials such that Epit for Ti Grade 2 was significantly lower

  19. Oxidation of methane over palladium catalysts: effect of the support.

    PubMed

    Escandón, Lara S; Ordóñez, Salvador; Vega, Aurelio; Díez, Fernando V

    2005-01-01

    This work is focused on the deep catalytic oxidation of methane over supported palladium catalysts. The influences of the metal loading, oxidation state of palladium, nature of supports, presence of promoters in the supports (for zirconia-based supports), and thermal stability have been studied experimentally. Catalysts were prepared by incipient wetness of commercially available supports with aqueous solutions of palladium nitrate. For gamma-alumina support, it was observed that the optimal amount of palladium is between 0.5% and 2%, with higher amounts leading to a loss in specific activity. Concerning the oxidation state of the catalyst, it is concluded that for all the supports tested in the present work, a reduction of the catalyst is not needed, yielding the same conversion at steady state catalysts reduced and oxidised. The thermal stability of various supported catalysts were also studied, zirconia supports being the most active. These supports, specially Y-modified zirconia support, do not suffer appreciable deactivation below 500 degrees C. PMID:15522328

  20. STRONTIUM AS AN EFFICIENT PROMOTER FOR SUPPORTED PALLADIUM HYDROGENATION CATALYSTS

    EPA Science Inventory

    The effect of strontium promotion is studied for a series of supported palladium catalysts such as Pd/zeolite-?, Pd/Al2O3, Pd/SiO2, Pd/hydrotalcite and Pd/MgO. Strontium is found to be an effective promoter for enhancing the metal area, perce...

  1. Thermal neutron capture cross sections of the palladium isotopes

    SciTech Connect

    Krticka, M. [Charles University in Prague, Faculty of Mathematics and Physics, V Holesovickach 2, CZ-180 00 Prague 8 (Czech Republic); North Carolina State University, Raleigh, NC 27695 (United States); Firestone, R. B. [Lawrence Berkeley National Laboratory, Berkeley, CA 94720 (United States); McNabb, D. P.; Sleaford, B.; Agvaanluvsan, U. [Lawrence Livermore National Laboratory, L-414, 7000 East Avenue, Livermore, CA 94551 (United States); Belgya, T.; Revay, Z. S. [Institute of Isotope and Surface Chemistry, H-1525, Budapest (Hungary)

    2008-05-15

    Precise thermal neutron capture {gamma}-ray cross sections {sigma}{sub {gamma}} were measured for all elements with Z=1-83,90, and 92, for He and Pm, at the Budapest Reactor. These data were evaluated with additional information from the literature to generate the Evaluated Gamma-ray Activation File (EGAF). Isotopic radiative neutron cross sections can be deduced from the total transition cross section feeding the ground state, {sigma}{sub 0}={sigma}{sigma}{sub {gamma}}(GS) if the decay scheme is complete. The EGAF file contains partial {gamma}-ray cross sections for all stable palladium isotopes. None of these decay schemes are complete, although in each case transitions de-exciting low-lying levels are known. We have performed Monte Carlo simulations of the palladium thermal neutron capture decay schemes using the computer code DICEBOX. The simulated populations of low low-lying levels are normalized to the measured {sigma}{sub {gamma}} values from EGAF and the total radiative neutron cross section {sigma}{sub 0} is obtained. The {sigma}{sub 0} values derived for the palladium isotopes agree well with previous measurements and were in several cases more precise. Complementary use of {gamma}-ray cross-section data and Monte Carlo calculations has proven effective in determining both the palladium total radiative cross sections and new nuclear structure information.

  2. Effect of particle size on the reactivity of supported palladium

    Microsoft Academic Search

    1983-01-01

    Carbon monoxide adsorbed on sufficiently small palladium particles disproportionates to surface carbon and carbon dioxide. This does not occur on larger particles. The reaction between carbon monoxide and dioxygen is shown to be structure-insensitive provided the metal surface available for the reaction is estimated correctly. This varies with temperature for the small particles, as at low temperatures the deposited carbon

  3. PLATINUM-GROUP METALS (Platinum, palladium, rhodium, ruthenium, iridium, osmium)

    E-print Network

    sector; and in the fabrication of laboratory equipment. In the electronics sector, PGMs are used as a percentage of apparent consumptione Platinum 92 93 90 91 91 Palladium 83 84 75 73 72 Recycling: An estimated 26,000 kilograms of PGMs was recovered from new and old scrap in 2008. Import Sources (2004

  4. PLATINUM-GROUP METALS (Platinum, palladium, rhodium, ruthenium, iridium, osmium)

    E-print Network

    as a percentage of apparent consumption:e Platinum NA 94 96 78 66 Palladium NA 90 92 84 87 Recycling: An estimated 70 metric tons of PGM were recovered from new and old scrap in 2000. Import Sources (1997 in 1999. Ruthenium prices were driven by increased demand from the electronics sector and reports

  5. PLATINUM-GROUP METALS (Platinum, palladium, rhodium, ruthenium, iridium, osmium)

    E-print Network

    for use in the electronics sector. Also in the electronics sector, PGMs are used in computer hard disks 91 Palladium 79 62 49 64 54 Recycling: An estimated 150,000 kilograms of PGMs was recovered globally from new and old scrap in 2012. Import Sources (2008­11): Platinum: Germany, 17%; South Africa, 14

  6. PLATINUM-GROUP METALS (Platinum, palladium, rhodium, ruthenium, iridium, osmium)

    E-print Network

    for use in the electronics sector. Also in the electronics sector, PGMs are used in computer hard disks 88 Palladium 73 79 62 49 56 Recycling: An estimated 36,000 kilograms of PGMs was recovered from new and old scrap in 2011. Import Sources (2007­10): Platinum: Germany, 17%; South Africa, 17%; United Kingdom

  7. PLATINUM-GROUP METALS (Platinum, palladium, rhodium, ruthenium, iridium, osmium)

    E-print Network

    high-purity single crystals for use in the electronics sector. Also in the electronics sector, PGMs Platinum 95 91 89 90 79 Palladium 62 49 64 57 60 Recycling: An estimated 155,000 kilograms of PGMs was recovered globally from new and old scrap in 2013, including about 56,000 kilograms of PGMs in North America

  8. Palladium-catalyzed direct arylation of indoles with cyclohexanones.

    PubMed

    Chen, Shanping; Liao, Yunfeng; Zhao, Feng; Qi, Hongrui; Liu, Saiwen; Deng, Guo-Jun

    2014-03-21

    A novel palladium catalyzed approach to 3-arylindoles was developed from indoles and cyclohexanones. Various cyclohexanones acted as aryl sources via an alkylation and dehydrogenation sequence using molecular oxygen as the hydrogen acceptor. This method showed good regioselectivity and afforded 3-arylindoles as the sole products. PMID:24597845

  9. Palladium-109 labeled anti-melanoma monoclonal antibodies

    DOEpatents

    Srivastava, S.C.; Fawwaz, R.A.; Ferrone, S.

    1984-04-30

    The invention consists of new monoclonal antibodies labelled with Palladium 109, a beta-emitting radionuclide, the method of preparing this material, and its use in the radiotherapy of melanoma. The antibodies are chelate-conjugated and demonstrate a high uptake in melanomas. (ACR)

  10. Palladium-Catalyzed ?-Allylation of 2,3-Disubstituted Indoles

    PubMed Central

    Kagawa, Natsuko; Malerich, Jeremiah P.

    2012-01-01

    Given the prevalence of the indole nucleus in biologically active compounds, the direct C3-functionalization of 2,3-disubstituted indoles represents an important problem. Described is a general, high-yielding method for the palladium-catalyzed ?-allylation of carba- and heterocycle fused indoles, including complex natural product substrates. PMID:18491859

  11. Iridium oxide and palladium modified nitric oxide microsensor

    Microsoft Academic Search

    Yuezhong Xian; Wenliang Sun; Jian Xue; Min Luo; Litong Jin

    1999-01-01

    An electrochemical microsensor, constructed by chemical modification of Nafion, poly(vinyl pyridine) (PVP), palladium and iridium oxide onto a platinum microelectrode, has been developed for the determination of nitric oxide (NO). This microsensor exhibits excellent catalytic activity toward NO oxidation, which is confirmed by differential pulse voltammetry. Cyclic voltammetry and differential pulse amperometry are also performed to measure NO. The catalytic

  12. Palladium based cermet composite for hydrogen separation at elevated temperature

    NASA Astrophysics Data System (ADS)

    Tsai, Yen-Chang; Lin, Chien-Cheng; Lin, Wei-Lin; Wang, Jeng-Han; Chen, San-Yuan; Lin, Pang; Wu, Pu-Wei

    2015-01-01

    A cermet composite consisting of palladium and BaCe0.4Zr0.4Gd0.1Dy0.1O3-x (BCZGD) is fabricated by mixing palladium and BCZGD powders in a ball mill, followed by pressing and sintering at 1450 °C for 24 h in air. The Pd-BCZGD cermet demonstrates impressive hydrogen permeation flux in a mixture of hydrogen and carbon dioxide at elevated temperature, in which the palladium plays the predominant role of facile transport in the hydrogen atoms whereas the BCZGD provides channels for proton conduction. Material characterization including scanning electron microscopy (SEM), X-ray diffraction (XRD), and thermo-gravimetric analysis (TGA) are performed. XRD patterns indicate pure phases of fcc palladium and perovskite BCZGD. SEM images and element mapping suggest a homogeneous mixture of cermet without noticeable defect and phase segregation. TGA results confirm stability of the cermet against carbon dioxide without chemical decomposition. The hydrogen permeation flux is determined via a gas chromatography from 400 to 700 °C at various hydrogen concentration gradients. We record a hydrogen flux of 1.25 cm3 min-1 cm-2 in 50% hydrogen and 50% carbon dioxide at 700 °C, with a selectivity of H2/CO2 approaching infinity.

  13. Discovery of palladium, antimony, tellurium, iodine, and xenon isotopes

    E-print Network

    Kathawa, J; Thoennessen, M

    2012-01-01

    Currently, thirty-eight palladium, thirty-eight antimony, thirty-nine tellurium, thirty-eight iodine, and forty xenon isotopes have been observed and the discovery of these isotopes is discussed here. For each isotope a brief synopsis of the first refereed publication, including the production and identification method, is presented.

  14. Discovery of palladium, antimony, tellurium, iodine, and xenon isotopes

    E-print Network

    J. Kathawa; C. Fry; M. Thoennessen

    2012-01-20

    Currently, thirty-eight palladium, thirty-eight antimony, thirty-nine tellurium, thirty-eight iodine, and forty xenon isotopes have been observed and the discovery of these isotopes is discussed here. For each isotope a brief synopsis of the first refereed publication, including the production and identification method, is presented.

  15. Discovery of palladium, antimony, tellurium, iodine, and xenon isotopes

    SciTech Connect

    Kathawa, J.; Fry, C.; Thoennessen, M., E-mail: thoennessen@nscl.msu.edu

    2013-01-15

    Currently, thirty-eight palladium, thirty-eight antimony, thirty-nine tellurium, thirty-eight iodine, and forty xenon isotopes have been observed and the discovery of these isotopes is described here. For each isotope a brief synopsis of the first refereed publication, including the production and identification method, is presented.

  16. Observation of a crossover in kinetic aggregation of Palladium colloids

    E-print Network

    M. Ghafari; M. Ranjbar; S. Rouhani

    2014-12-27

    We use field emission scanning electron microscope (FE-SEM) to investigate the growth of palladium colloids over the surface of thin films of WO3/glass. The film is prepared by Pulsed Laser Deposition (PLD) at different temperatures. A PdCl2 (aq) droplet is injected on the surface and in the presence of steam hydrogen the droplet is dried through a reduction reaction process. Two distinct aggregation regimes of palladium colloids are observed over the substrates. We argue that the change in aggregation dynamics emerges when the measured water drop Contact Angel (CA) for the WO3/glass thin films passes a certain threshold value, namely CA = 46 degrees, where a crossover in kinetic aggregation of palladium colloids occurs. Our results suggest that the mass fractal dimension of palladium aggregates follows a power-law behavior. The fractal dimension (Df) in the fast aggregation regime, where the measured CA values vary from 27 up to 46 degrees, according to different substrate deposition temperatures, is Df = 1.75 (0.02). This value of Df is in excellent agreement with kinetic aggregation of other colloidal systems in fast aggregation regime. Whereas for the slow aggregation regime, with CA = 58 degrees, the fractal dimension changes abruptly to Df=1.92 (0.03). We have also used a modified Box-Counting method to calculate fractal dimension of gray-level images and observe that the crossover at around CA = 46 degrees remains unchanged.

  17. Selective Hydrogenation of Ethyne in Ethene?Rich Streams on Palladium Catalysts, Part 2: Steady?State Kinetics and Effects of Palladium Particle Size, Carbon Monoxide, and Promoters

    Microsoft Academic Search

    Andrzej Borodzi?ski; Geoffrey C. Bond

    2008-01-01

    Developments in the last three decades of kinetics of selective hydrogenation of ethyne in ethene?rich streams on palladium catalysts are reviewed. Most of the studies can be described comprehensively by a model that assumes carbonaceous deposits (i) create irreversibly on the palladium surface small A types of active site (selective to ethene) and large E types of active site (selective

  18. Palladium-catalyzed carbene migratory insertion using conjugated ene-yne-ketones as carbene precursors.

    PubMed

    Xia, Ying; Qu, Shuanglin; Xiao, Qing; Wang, Zhi-Xiang; Qu, Peiyuan; Chen, Li; Liu, Zhen; Tian, Leiming; Huang, Zhongxing; Zhang, Yan; Wang, Jianbo

    2013-09-11

    Palladium-catalyzed cross-coupling reactions between benzyl, aryl, or allyl bromides and conjugated ene-yne-ketones lead to the formation of 2-alkenyl-substituted furans. This novel coupling reaction involves oxidative addition, alkyne activation-cyclization, palladium carbene migratory insertion, ?-hydride elimination, and catalyst regeneration. Palladium (2-furyl)carbene is proposed as the key intermediate, which is supported by DFT calculations. The palladium carbene character of the key intermediate is validated by three aspects, including bond lengths, Wiberg bond order indices, and molecular orbitals, by comparison to those reported for stable palladium carbene species. Computational studies also revealed that the rate-limiting step is ene-yne-ketone cyclization, which leads to the formation of the palladium (2-furyl)carbene, while the subsequent carbene migratory insertion is a facile process with a low energy barrier (<5 kcal/mol). PMID:23947689

  19. Characterization of the {beta}-phase of the palladium-hydrogen equation of state

    SciTech Connect

    Fisher, K.J.

    1998-07-01

    The {beta}-phase of the P-C-T curves of the palladium-hydrogen system is encountered at high pressures of gaseous hydrogen and low temperatures of this system. The {beta}-phase is characterized by an increase in the concentration of hydrogen in the palladium lattice with an increase in pressure of the free hydrogen gas surrounding the palladium. The P-C-T curves in this study are determined by gravimetric measurements of the hydrided palladium sample to determine the amount of hydrogen within the palladium lattice. The amount of hydrogen is kept constant within the experimental system and the temperature is varied which changes the pressures. The objective of this experimental thesis is to accurately determine the P-C-T curves of palladium in the {beta}-phase region to pressures of 20,000 psia and medium to low temperature region of {minus}60 C to 100 C.

  20. Volume 118 (2013) http://dx.doi.org/10.6028/jres.118.016 Journal of Research of the National Institute of Standards and Technology

    E-print Network

    Volume 118 (2013) http://dx.doi.org/10.6028/jres.118.016 Journal of Research of the National laboratories after the kilogram is redefined with the current capabilities based on the international prototype.6028/jres.118.016 Journal of Research of the National Institute of Standards and Technology 354 http

  1. Hydrogen transport through tubular membranes of palladium-coated tantalum and niobium

    Microsoft Academic Search

    Robert E. Buxbaum; Andrew B. Kinney

    1996-01-01

    Palladium-based membranes have been used for decades in hydrogen extraction because of their high permeability and good surface properties and because palladium, like all metals, is 100% selective for hydrogen transport. The authors describe experiments with hydrogen-extraction membranes made of palladium-coated niobium and tantalum heat-exchanger tubers. The cost was about $45\\/ft of 3\\/8 inch tubular membrane, and the fluxes were

  2. Structure, energetic and phase transition of small nickel-palladium heterogeneous clusters

    NASA Astrophysics Data System (ADS)

    Hewage, Jinasena W.

    2014-06-01

    Molecular dynamics simulation (MD) with Sutton-Chen potential for palladium-palladium, nickel-nickel and palladium-nickel interactions has been used to generate the minimum energy structures and to study the thermodynamic and dynamic properties of mixed transition metal cluster motifs of Ni n Pd(13- n) for n ? 13. Thirteen particle icosahedral clusters of neat palladium and nickel atoms were first reproduced accordingly with the results in literature. Then in the palladium icosahedra, each palladium atom has been successively replaced by nickel atom. Calculation is repeated for both palladium-centered and nickel-centered clusters. It is found that the nickel-centered clusters are more stable than the palladium-centered clusters and cohesive energy increases along the palladium end to nickel end. Phase transition of each cluster from one end-species to the other end-species is studied by means of caloric curve, root mean square bond fluctuation and heat capacity. Trend in variation of melting temperature is opposite to the energy trend. Palladium-centered cluster shows a premelting at low temperature due to the solid-solid structural transition. Species-centric order parameters developed by Hewage and Amar is used to understand the dynamic behavior in the solid-solid transition of palladium-centered cluster to more stable nickel-centered cluster (premelting). This species-centric order parameter calculation further confirmed the stability of nickel-centered species over those of palladium-centered species and solid-solid structural transition at low temperature.

  3. Palladium profiles in titanium treated by high-intensity plasma pulses

    Microsoft Academic Search

    Z Werner; J Piekoszewski; W Szymczyk; F. A Bonilla; T. S Ong; P Skeldon; G. E Thompson; S Zielinski; A Chmielewski; R Grötzschel; J Stanis?awski

    2002-01-01

    Palladium-alloyed surface layers in titanium were formed by deposition of palladium followed by treatment with high-intensity nitrogen plasma pulses (pulsed implantation doping, PID), capable of melting the substrate, and compared with those formed by the deposition by pulse erosion (DPE) process, in which erosion of palladium electrodes of the nitrogen plasma gun provided the deposit. As previously reported, the DPE-processed

  4. LLE Review 118 (January-March 2009)

    SciTech Connect

    Bittle, W., editor

    2009-08-03

    This issue has the following articles: (1) Applied Plasma Spectroscopy: Laser-Fusion Experiments; (2) Relativistic Electron-Beam Transport Studies Using High-Resolution, Coherent Transition Radiation Imaging; (3) Pressure-Driven, Resistive Magnetohydrodynamic Interchange Instabilities in Laser-Produced, High-Energy-Density Plasmas; (4) Extended Model for Polymer Cholesteric Liquid Crystal Flake Reorientation and Relaxation; (5) Modeling the Effects of Microencapsulation on the Electro-Optic Behavior of Polymer Cholesteric Liquid Crystal Flakes; (6) Capillarity and Dielectrophoresis of Liquid Deuterium; and (7) A Stable Mid-IR, GaSb-Based Diode Laser Source for Cryogenic Target Layering at the OMEGA Laser Facility.

  5. Mechanism of enhanced hydrogen adsorption on palladium-doped nanoporous carbon fibers

    SciTech Connect

    Contescu, Cristian I [ORNL; Gallego, Nidia C [ORNL; Wu, Xianxian [ORNL; Tekinalp, Halil [Clemson University; Edie, Dan [Clemson University; Thies, Mark C [ORNL; Baker, Frederick S [ORNL

    2007-01-01

    Recent work at Oak Ridge National Laboratory was directed towards adsorptive storage of hydrogen in nanoporous carbon fibers in which palladium was incorporated prior to spinning and carbonization/activation of the fibers. Palladium doped carbon fibers exhibited enhanced hydrogen uptake compared to the corresponding palladium-free nanoporous carbon fibers (at room temperature and 2 MPa pressure). However, the mechanism responsible for the enhanced hydrogen uptake is not fully understood. New findings are presented in this paper in support of a mechanism that encompasses both hydrogen spillover on palladium metal sites and hydrogen physisorption on nanostructured carbon sites.

  6. Extraction of palladium from acidic solutions with the use of carbon adsorbents

    SciTech Connect

    O.N. Kononova; N.G. Goryaeva; N.B. Dostovalova; S.V. Kachin; A.G. Kholmogorov [Krasnoyarsk State University, Krasnoyarsk (Russian Federation)

    2007-08-15

    We studied the sorption of palladium(II) on LKAU-4, LKAU-7, and BAU carbon adsorbents from model hydrochloric acid solutions and the solutions of spent palladium-containing catalysts. It was found that sorbents based on charcoal (BAU) and anthracite (LKAU-4) were characterized by high sorption capacities for palladium. The kinetics of the saturation of carbon adsorbents with palladium(II) ions was studied, and it was found that more than 60% of the initial amount of Pd(II) was recovered in a 1-h contact of an adsorbent with a model solution. This value for the solutions of spent catalysts was higher than 35%.

  7. Lifetime measurements by the Doppler-shift attenuation method in the {sup 115}Sn({alpha},n{gamma}){sup 118}Te reaction

    SciTech Connect

    Mihai, C. [Horia Hulubei National Institute of Physics and Nuclear Engineering, RO-077125 Bucharest (Romania); Faculty of Physics, University of Bucharest, Bucharest (Romania); Pasternak, A. A. [Cyclotron Laboratory, A.F. Ioffe Physical Technical Institute, 194021 St. Petersburg (Russian Federation); Pascu, S.; Filipescu, D.; Ivascu, M.; Bucurescu, D.; Cata-Danil, I.; Deleanu, D.; Ghita, D. G.; Glodariu, T.; Marginean, N.; Marginean, R.; Negret, A.; Sava, T.; Stroe, L.; Suliman, G.; Zamfir, N. V. [Horia Hulubei National Institute of Physics and Nuclear Engineering, RO-077125 Bucharest (Romania); Cata-Danil, G. [Horia Hulubei National Institute of Physics and Nuclear Engineering, RO-077125 Bucharest (Romania); Physics Department, University 'Politehnica' of Bucharest, Bucharest (Romania)

    2011-05-15

    {gamma} rays were measured at several angles in both singles and coincidence modes in the {sup 115}Sn({alpha},n{gamma}){sup 118}Te reaction at 15 MeV on a thick target. Multipolarities and mixing ratios were determined from the {gamma}-ray angular distribution analysis. Lifetimes of 11 low- and medium-spin excited states in {sup 118}Te were determined from a Monte Carlo Doppler-shift attenuation method analysis of the Doppler broadened line shapes of {gamma} rays deexciting the levels. The results are discussed in comparison with the predictions of the interacting boson model.

  8. Effect of particle size on the reactivity of supported palladium

    SciTech Connect

    Ichikawa, S.

    1983-01-01

    Carbon monoxide adsorbed on sufficiently small palladium particles disproportionates to surface carbon and carbon dioxide. This does not occur on larger particles. The reaction between carbon monoxide and dioxygen is shown to be structure-insensitive provided the metal surface available for the reaction is estimated correctly. This varies with temperature for the small particles, as at low temperatures the deposited carbon eliminates sites for the reaction while the later become available at higher temperatures at which surface carbon reacts away with dioxygen. As a result of disproportionation of carbon monoxide on small particles, the selectivity of the reactions between carbon monoxide and dihydrogen shifts from methanol on large particles to methane on small ones. The methanation activity increases as the metal particle size decreases, indicating that methanation is a structure-sensitive reaction on palladium.

  9. METHOD TO TEST ISOTOPIC SEPARATION EFFICIENCY OF PALLADIUM PACKED COLUMNS

    SciTech Connect

    Heung, L; Gregory Staack, G; James Klein, J; William Jacobs, W

    2007-06-27

    The isotopic effect of palladium has been applied in different ways to separate hydrogen isotopes for many years. At Savannah River Site palladium deposited on kieselguhr (Pd/k) is used in a thermal cycling absorption process (TCAP) to purify tritium for over ten years. The need to design columns for different throughputs and the desire to advance the performance of TCAP created the need to evaluate different column designs and packing materials for their separation efficiency. In this work, columns with variations in length, diameter and metal foam use, were tested using an isotope displacement method. A simple computer model was also developed to calculate the number of theoretical separation stages using the test results. The effects of column diameter, metal foam and gas flow rate were identified.

  10. The catalytic inactivation of cellulase enzyme components by palladium complexes

    SciTech Connect

    Woodward, J.; Gooch, M.G.; Shultz, M.D.

    1993-10-01

    It has been discovered that sodium hexachloropalladate is a strong inhibitor of cellobiohydrolase I (CBH I) from Trichoderma reesei having an I{sub 50} of <50 {mu}M with p-nitrophenylcellobioside (PNPC) as the substrate. Similar complexes of the metals platinum, osmium, iridium, and rhodium have little effect on CBH I. Other cellulase activities (Avicelase, {beta}-glucanase) are also inhibited by the palladium complex, suggesting that inhibition of two major types of catalytic activity in cellulase are affected. Preliminary data on the kinetics of inhibition of CBH I by sodium hexachloropalladate indicate that the inhibition is reversible and, possibly, uncompetitive. It is anticipated that sodium hexachloropalladate and other palladium complexes will be useful for determining the effect of the binding of catalytically inactivated CBH I and other cellulase components on the structure of cellulose fibers.

  11. SRS history and experience with palladium diffusers. Revision 1

    SciTech Connect

    Clark, E.A.; Dauchess, D.A.; Heung, L.K.; Rabun, R.L.; Motyka, T.

    1995-08-11

    The Savannah River Site (SRS) has processed tritium in support of national defense programs since 1955. Palladium diffusers have been used extensively for separating hydrogen isotopes from inert gases (such as argon, helium, and nitrogen). In almost forty years of service, the design of the diffuser has been steadily improving. Several diffuser designs from different manufacturers have been evaluated at SRS. The operating experience gained from these designs together with failure analyses performed on failed units have led to several recommendations for improved diffuser designs and operating methods. This experience gained at SRS and the following recommendations form the basis of this report. Even though palladium diffuser technology has proven to be reliable, SRS has examined several alternative technologies over the past several years. This report will also review some of these promising alternatives.

  12. Biaryl Phosphine Ligands in Palladium-Catalyzed Amination

    PubMed Central

    Surry, David S.

    2012-01-01

    Palladium-catalyzed amination of aryl halides has undergone rapid development in the last 12 years. This has been largely driven by implementation of new classes of ligands. Biaryl phosphines have proven to provide especially active catalysts in this context. This review discusses the applications that these catalysts have found in C-N cross-coupling in heterocycle synthesis, pharmaceuticals, materials science and natural product synthesis. PMID:18663711

  13. Determination of palladium--aluminum reaction propagation rates and temperatures

    Microsoft Academic Search

    Birnbaum

    1978-01-01

    Three experimental techniques--thermometry, framing and streaking photography, and dynamic radiography--were employed to determine the reaction propagation rates and temperatures of various mixtures of palladium and aluminum. Pellets of 94\\/6, 90\\/10, and 80\\/20 Pd\\/Al mixtures with an average density of 5 x 10³ kg\\/m³ were prepared and tested in an insulating sleeve. Pretest radiography was used to determine the density in

  14. On the Palladium-On-Charcoal Disproportionate of Rosin

    Microsoft Academic Search

    Zhan-Qian Song; Eugene Zavarin; Duane F. Zinkel

    1985-01-01

    Changes in the composition of gum rosin during disproportionate in the presence of 5% palladium-on-charcoal have been determined by gas chromatography. The principal reaction product was dehydro-abietic acid. The exocyclic vinyl group of the pimaric\\/isopimaric-type resin acids was hydrogenated completely. Only a small amount of dihydroabietic acids was formed. Eight dihydro resin acids were identified. No tetrahydro resin acids were

  15. Palladium and organocatalysis: an excellent recipe for asymmetric synthesis.

    PubMed

    Fernández-Ibañez, M Angeles; Maciá, Beatriz; Alonso, Diego A; Pastor, Isidro M

    2013-01-01

    The dual activation of simple substrates by the combination of organocatalysis and palladium catalysis has been successfully applied in a variety of different asymmetric transformations. Thus, the asymmetric a-allylation of carbonyl compounds, a-fluorination of acyl derivatives, decarboxylative protonation of ?-dicarbonyl compounds, cyclization reactions of alkynyl carbonyl compounds and ?-functionalization of aldehydes have been efficiently achieved employing this double-catalytic methodology. PMID:23973988

  16. A Cooperative N-Heterocyclic Carbene/Palladium Catalysis System.

    PubMed

    Liu, Kun; Hovey, M Todd; Scheidt, Karl A

    2014-10-01

    N-heterocyclic carbenes (NHC) have been extensively studied as organocatalysts and ligands for transition metals, but the successful integration of NHCs and late transition metals in cooperative catalysis remains an underexplored area. We have developed a cooperative palladium-catalyzed allylation of NHC-activated aldehydes to access a variety of 3-allyl dihydrocoumarin derivatives. Kinetic experiments support a cooperative pathway for this transformation. PMID:25364496

  17. Palladium-catalyzed decarboxylative trifluoroethylation of aryl alkynyl carboxylic acids.

    PubMed

    Hwang, Jinil; Park, Kyungho; Choe, Juseok; Min, Hongkeun; Song, Kwang Ho; Lee, Sunwoo

    2014-04-01

    A trifluoroethylation of alkynes through a palladium-catalyzed decarboxylative coupling reaction was developed. When alkynyl carboxylic acids and ICH2CF3 were allowed to react with [Pd(?(3)-allyl)Cl]2/XantPhos and Cs2CO3 in N,N-dimethylformamide (DMF) at 80 °C for 1 h, the desired products were formed in good yields. This catalytic system showed high functional group tolerance. PMID:24628537

  18. Stereocontrolled O-glycosylation with palladium-catalyzed decarboxylative allylation.

    PubMed

    Xiang, Shaohua; He, Jingxi; Tan, Yu Jia; Liu, Xue-Wei

    2014-12-01

    The Pd-?-allyl intermediate in an electron-rich glycal system with poor reactivity is employed as an efficient glycosyl donor. Starting from glucal derived carbonate, various O-glycosides were formed via a palladium-catalyzed reaction through a tandem decarboxylation, proton abstraction, and nucleophilic addition, in good yields with excellent selectivity. Iterative glycosylation with the same strategy may provide an access to complex oligosaccharides. PMID:25406990

  19. Palladium- (and nickel-) catalyzed vinylation of aryl halides†

    PubMed Central

    Denmark, Scott E.; Butler, Christopher R.

    2009-01-01

    Functionalized styrenes are extremely useful building blocks for organic synthesis and for functional polymers. One of the most general syntheses of styrenes involves the combination of an aryl halide with a vinyl organometallic reagent under catalysis by palladium or nickel complexes. This Feature Article provides the first comprehensive summary of the vinylation methods currently available along with a critical comparison of the efficiency, cost and scope of the methods. PMID:19081992

  20. Cost estimate for muddy water palladium production facility at Mound

    Microsoft Academic Search

    McAdams

    1988-01-01

    An economic feasibility study was performed on the ''Muddy Water'' low-chlorine content palladium powder production process developed by Mound. The total capital investment and total operating costs (dollars per gram) were determined for production batch sizes of 1--10 kg in 1-kg increments. The report includes a brief description of the Muddy Water process, the process flow diagram, and material balances

  1. Atomic Mass and Nuclear Binding Energy for Pd-99 (Palladium)

    NASA Astrophysics Data System (ADS)

    Sukhoruchkin, S. I.; Soroko, Z. N.

    This document is part of the Supplement containing the complete sets of data of Subvolume A `Nuclei with Z = 1 - 54' of Volume 22 `Nuclear Binding Energies and Atomic Masses' of Landolt-Börnstein - Group I `Elementary Particles, Nuclei and Atoms'. It provides atomic mass, mass excess, nuclear binding energy, nucleon separation energies, Q-values, and nucleon residual interaction parameters for atomic nuclei of the isotope Pd-99 (Palladium, atomic number Z = 46, mass number A = 99).

  2. Palladium-Catalyzed Synthesis of N-Aryl Carbamates

    PubMed Central

    Vinogradova, Ekaterina V.; Park, Nathaniel H.; Fors, Brett P.; Buchwald, Stephen L.

    2013-01-01

    An efficient synthesis of aryl carbamates was achieved by introducing alcohols into the reaction of palladium-catalyzed cross-coupling of ArX (X = Cl, OTf) with sodium cyanate. The use of aryl triflates as electrophilic components in this transformation allowed for an expanded substrate scope for direct synthesis of aryl isocyanates. This methodology provides direct access to major carbamate protecting groups, S-thiocarbamates, and diisocyanate precursors to polyurethane materials. PMID:23441814

  3. Palladium nanoparticle-based surface acoustic wave hydrogen sensor.

    PubMed

    Sil, Devika; Hines, Jacqueline; Udeoyo, Uduak; Borguet, Eric

    2015-03-18

    Palladium (Pd) nanoparticles (5-20 nm) are used as the sensing layer on surface acoustic wave (SAW) devices for detecting H2. The interaction with hydrogen modifies the conductivity of the Pd nanoparticle film, producing measurable changes in acoustic wave propagation, which allows for the detection of this explosive gas. The nanoparticle-based SAW sensor responds rapidly and reversibly at room temperature. PMID:25746067

  4. Synthesis and study of palladium colloids and related catalysts

    Microsoft Academic Search

    S. Yu Troitski; M. A Serebriakova; M. A Fedotov; S. V Ignashin; A. L Chuvilin; E. M Moroz; B. N Novgorodov; D. I Kochubey; V. A Likholobov; B Blanc; P Gallezot

    2000-01-01

    Colloidal palladium particles were prepared by reduction with hydrogen of H2PdCl4 in a mixture of H2O, trioctylamine (TOA), and cyclohexane. According to 14N NMR, 35Cl NMR and EXAFS data, the reduction of Pd was found to proceed under an auto-catalyzed regime via (HTOA)2 [PdCl4] complex formation. After complete reduction of Pd(II) (1 mol H2 consumed per 1 Pd atom), H2

  5. Cyclic Voltammetric Preparation of Palladium Nanoparticles for Ethanol Oxidation Reaction

    E-print Network

    Guo, John Zhanhu

    to the limited resources of Pt,3 non-Pt-based catalysts used in the oxidation of small organic moleculesO-coated glassy carbon (GC) electrode for a few cycles with the potential swept from -1.0 to -1.2 V versus.4,5 Among those developed non-Pt-based catalysts, palladium (Pd) is thought to be the main Pt

  6. Methane ignition catalyzed by in situ generated palladium nanoparticles

    SciTech Connect

    Shimizu, T.; Abid, A.D.; Poskrebyshev, G.; Wang, H. [Department of Aerospace and Mechanical Engineering, University of Southern California, Los Angeles, CA 90089 (United States); Nabity, J.; Engel, J.; Yu, J. [TDA Research, Inc., 12345 W. 52nd Ave, Wheat Ridge, CO 80033 (United States); Wickham, D. [Reaction Systems, LLC, 19039 E. Plaza Drive, Suite 290, Parker, CO 80134 (United States); Van Devener, B.; Anderson, S.L. [Department of Chemistry, University of Utah, Salt Lake City, UT 84112 (United States); Williams, S. [Air Force Research Laboratory, Mail Stop RZA, 1950 Fifth Street, WPAFB, OH 45433 (United States)

    2010-03-15

    Catalytic ignition of methane over the surfaces of freely-suspended and in situ generated palladium nanoparticles was investigated experimentally and numerically. The experiments were conducted in a laminar flow reactor. The palladium precursor was a compound (Pd(THD){sub 2}, THD: 2,2,6,6-tetramethyl-3,5-heptanedione) dissolved in toluene and injected into the flow reactor as a fine aerosol, along with a methane-oxygen-nitrogen mixture. For experimental conditions chosen in this study, non-catalytic, homogeneous ignition was observed at a furnace temperature of {proportional_to}1123 K, whereas ignition of the same mixture with the precursor was found to be {proportional_to}973 K. In situ production of Pd/PdO nanoparticles was confirmed by scanning mobility, transmission electron microscopy and X-ray photoelectron spectroscopy analyses of particles collected at the reactor exit. The catalyst particle size distribution was log-normal. Depending on the precursor loading, the median diameter ranged from 10 to 30 nm. The mechanism behind catalytic ignition was examined using a combined gas-phase and gas-surface reaction model. Simulation results match the experiments closely and suggest that palladium nanocatalyst significantly shortens the ignition delay times of methane-air mixtures over a wide range of conditions. (author)

  7. Microwave-assisted synthesis of palladium nanocubes and nanobars

    SciTech Connect

    Yu, Yanchun; Zhao, Yanxi [Key Laboratory of Catalysis and Material Science of the State Ethnic Affairs Commission and Ministry of Education, Hubei Province, College of Chemistry and Material Science, South-Central University for Nationalities, Wuhan 430074 (China)] [Key Laboratory of Catalysis and Material Science of the State Ethnic Affairs Commission and Ministry of Education, Hubei Province, College of Chemistry and Material Science, South-Central University for Nationalities, Wuhan 430074 (China); Huang, Tao, E-mail: huangt6628@yahoo.com.cn [Key Laboratory of Catalysis and Material Science of the State Ethnic Affairs Commission and Ministry of Education, Hubei Province, College of Chemistry and Material Science, South-Central University for Nationalities, Wuhan 430074 (China)] [Key Laboratory of Catalysis and Material Science of the State Ethnic Affairs Commission and Ministry of Education, Hubei Province, College of Chemistry and Material Science, South-Central University for Nationalities, Wuhan 430074 (China); Liu, Hanfan, E-mail: hfliu@mail.iccas.ac.cn [Key Laboratory of Catalysis and Material Science of the State Ethnic Affairs Commission and Ministry of Education, Hubei Province, College of Chemistry and Material Science, South-Central University for Nationalities, Wuhan 430074 (China) [Key Laboratory of Catalysis and Material Science of the State Ethnic Affairs Commission and Ministry of Education, Hubei Province, College of Chemistry and Material Science, South-Central University for Nationalities, Wuhan 430074 (China); Institute of Chemistry, Chinese Academy of Science, Beijing 100080 (China)

    2010-02-15

    Microwave was employed in the shape-controlled synthesis of palladium nanoparticles. Palladium nanocubes and nanobars with a mean size of about 23.8 nm were readily synthesized with H{sub 2}PdCl{sub 4} as a precursor, tetraethylene glycol (TEG) as both a solvent and a reducing agent in the presence of PVP and CTAB in 80 s under microwave irradiation. The structures of the as-prepared palladium nanoparticles were characterized by transmission electron microscopy (TEM), X-ray powder diffraction (XRD) and ultraviolet-visible (UV-vis) absorption spectroscopy. The formation of PdBr{sub 4}{sup 2-}due to the coordination replacement of the ligand Cl{sup -} ions in PdCl{sub 4}{sup 2-} ions by Br{sup -} ions in the presence of bromide was responsible for the synthesis of Pd nanocubes and nanobars. In addition, a milder reducing power, a higher viscosity and a stronger affinity of TEG were beneficial to the larger sizes of Pd nanocubes and nanobars.

  8. 118. Photocopy of original construction drawing, dated 21 May 1935 ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    118. Photocopy of original construction drawing, dated 21 May 1935 (Original print in the possession of U.S. Army Corps of Engineers, Portland District, Portland, OR.) (P-10-59) UPPER PIPE GALLERY - OIL STORAGE AND SEWAGE DISPOSAL, EL +23.5. - Bonneville Project, Powerhouse No.1, Spanning Bradford Slough, from Bradford Island, Bonneville, Multnomah County, OR

  9. 118 MATHEMATICS MAGAZINE Geometry of Generalized Complex Numbers

    E-print Network

    Harkin, Anthony

    118 MATHEMATICS MAGAZINE Geometry of Generalized Complex Numbers ANTHONY A. HARKIN Division unit i other than i2 = -1 can give rise to inter- esting and useful complex number systems. The 16th to utilize the complex numbers we know today by calculating with a quantity whose square is -1. Since then

  10. Agricultural and Forest Meteorology 118 (2003) 137141 Short communication

    E-print Network

    Lee, Xuhui

    in understory PAR for a mixed deciduous forest in New England, USA Matthew M. Fladeland, Mark S. Ashton, Xuhui and Plusnin, 1945). It is classified as a mixed deciduous­coniferous forest with a tree canopy comprisedAgricultural and Forest Meteorology 118 (2003) 137­141 Short communication Landscape variations

  11. Biochem. J. (1969) 118, 369 Printed in Great Britain

    E-print Network

    Biochem. J. (1969) 118, 369 Printed in Great Britain The Rate-Determining Step in Pepsin further the pathway of pepsin-catalysed reactions, three types of experiments were performed: (a to observing the rate- determining breakdown of a common intermediate; (b) the interaction of pepsin

  12. Biol. Cybern. 69, 109-118 (1993) Biological Cybernetics

    E-print Network

    Goodhill, Geoffrey J.

    eyes. An important aspect of this model is that ocular dominance segregation can occur when the twoBiol. Cybern. 69, 109-118 (1993) Biological Cybernetics 9 Springer-Verlag1993 Topography and ocular: 13 January 1993 Abstract. The map from eye to brain in vertebrates is topographic, i.e. neighbouring

  13. BIOLOGICAL CYBERNETICS, 69, 109-118. Topography And Ocular Dominance

    E-print Network

    Sejnowski, Terrence J.

    of activity presented simultaneously in both eyes. An important aspect of this model is that ocular dominanceBIOLOGICAL CYBERNETICS, 69, 109-118. Topography And Ocular Dominance: A Model Exploring Positive Edinburgh EH8 9LW UNITED KINGDOM ¡ ¢ £ ¤ ¥ ¦ § ¨ ¦ © £ ¦ Abstract The map from eye to brain

  14. Cleanup Verification Package for the 118-F-1 Burial Ground

    Microsoft Academic Search

    H. M. Sulloway E. J. Farris

    2008-01-01

    This cleanup verification package documents completion of remedial action for the 118-F-1 Burial Ground on the Hanford Site. This burial ground is a combination of two locations formerly called Minor Construction Burial Ground No. 2 and Solid Waste Burial Ground No. 2. This waste site received radioactive equipment and other miscellaneous waste from 105-F Reactor operations, including dummy elements and

  15. CNN Newsroom Classroom Guides. December 1-18, 1998.

    ERIC Educational Resources Information Center

    Cable News Network, Atlanta, GA.

    These guides, designed to accompany the daily Cable News Network (CNN) Newsroom broadcasts for December 1-18, 1998, provide program rundowns, suggestions for class activities and discussion, links to relevant World Wide Web sites, and a list of related news terms. Top stories include: World AIDS Day/AIDS history, Exxon and Mobile announce a…

  16. 118. Photocopy of drawing (1958 civil engineering drawing by the ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    118. Photocopy of drawing (1958 civil engineering drawing by the Ralph M. Parsons Company) PLOT AND UTILITY PLAN FOR LAUNCH OPERATIONS BUILDING, SHEET C7 OF 40 - Vandenberg Air Force Base, Space Launch Complex 3, Launch Operations Building, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

  17. Institute Archives and Special Collections Building 14N-118

    E-print Network

    Reif, Rafael

    Institute Archives and Special Collections Building 14N-118 77 Massachusetts Avenue Cambridge, MA 02139-4307 http://libraries.mit.edu/archives A R C H I V E S Phone 617.253.5136 Fax 617.258.7305 Email This collection was assembled by the staff of the Institute Archives. Some publications were originally in the MIT

  18. Institute Archives and Special Collections Building 14N-118

    E-print Network

    Reif, Rafael

    Institute Archives and Special Collections Building 14N-118 77 Massachusetts Avenue Cambridge, MA 02139-4307 http://libraries.mit.edu/archives A R C H I V E S Phone 617.253.5136 Fax 617.258.7305 Email: Amy Sugarman PROVENANCE The records were given to the Institute Archives by Carroll L. Wilson in two

  19. Institute Archives and Special Collections Building 14N-118

    E-print Network

    Reif, Rafael

    Institute Archives and Special Collections Building 14N-118 77 Massachusetts Avenue Cambridge, MA 02139-4307 http://libraries.mit.edu/archives A R C H I V E S Phone 617.253.5136 Fax 617.258.7305 Email of the President (Jerome B. Wiesner), 1960-1984 Archival Collection - AC 8 254 manuscript boxes 84.6 cubic feet

  20. 40 CFR 91.118 - Certification procedure-testing.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...emission tests are required before and after any engine maintenance...OB/PWC through: (i) Model year 2000 based on the function...under § 91.118(h) by the end of model year 2000; that the FEL is revised and approved by EPA to...

  1. Z .Geomorphology 38 2001 118 www.elsevier.nlrlocatergeomorph

    E-print Network

    Schaetzl, Randall

    Z .Geomorphology 38 2001 1­18 www.elsevier.nlrlocatergeomorph z /Paleowind 11,000 BP directions Algonquin; Late Pleistocene; Paleoclimate; Coastal geomorphology; Paleo-Indians; Archeology 1. Introduction 00 00040-4 #12;( )F. Krist, R.J. SchaetzlrGeomorphology 38 2001 1­182 .Svensson, 1998 . Also, certain

  2. 118 Environmental Science and Policy Environmental Science and Policy

    E-print Network

    Lewis, Robert Michael

    118 · Environmental Science and Policy Environmental Science and Policy ADVISORY COMMITTEE: A: De- Berry. The environmental problems that threaten the planet on which our society depends of the need for an appropriate balance between breadth and depth of training, the Environmental Science

  3. 118. COTTONWOOD CREEK SPILL, TWIN FALLS COUNTY, SOUTH OF KIMBERLY, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    118. COTTONWOOD CREEK SPILL, TWIN FALLS COUNTY, SOUTH OF KIMBERLY, IDAHO; WEST VIEW OF GATES ON HIGH LINE CANAL. - Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 miles West of city of Burley, Idaho, Twin Falls, Twin Falls County, ID

  4. Cleanup Verification Package for the 118-F-6 Burial Ground

    SciTech Connect

    H. M. Sulloway

    2008-10-02

    This cleanup verification package documents completion of remedial action for the 118-F-6 Burial Ground located in the 100-FR-2 Operable Unit of the 100-F Area on the Hanford Site. The trenches received waste from the 100-F Experimental Animal Farm, including animal manure, animal carcasses, laboratory waste, plastic, cardboard, metal, and concrete debris as well as a railroad tank car.

  5. Ultrafine nanoporous palladium-aluminum film fabricated by citric acid-assisted hot-water-treatment of aluminum-palladium alloy film

    NASA Astrophysics Data System (ADS)

    Harumoto, Takashi; Tamura, Yohei; Ishiguro, Takashi

    2015-01-01

    Hot-water-treatment has been adapted to fabricate ultrafine nanoporous palladium-aluminum film from aluminum-palladium alloy film. Using citric acid as a chelating agent, a precipitation of boehmite (aluminum oxide hydroxide, AlOOH) on the nanoporous palladium-aluminum film was suppressed. According to cross-sectional scanning transmission electron microscopy observations, the ligament/pore sizes of the prepared nanoporous film were considerably small (on the order of 10 nm). Since this fabrication method only requires aluminum alloy film and hot-water with chelating agent, the ultrafine nanoporous film can be prepared simply and environmentally friendly.

  6. Synthesis and characterization of palladium and palladium-cobalt nanoparticles on Vulcan XC-72R for the oxygen reduction reaction.

    PubMed

    Arroyo-Ramírez, Lisandra; Montano-Serrano, Rubenier; Luna-Pineda, Tatiana; Román, Félix R; Raptis, Raphael G; Cabrera, Carlos R

    2013-11-27

    A single-source approach was used to synthesize bimetallic nanoparticles on a high-surface-area carbon-support surface. The synthesis of palladium and palladium-cobalt nanoparticles on carbon black (Vulcan XC-72R) by chemical and thermal reduction using organometallic complexes as precursors is described. The electrocatalysts studied were Pd/C, Pd2Co/C, and PdCo2/C. The nanoparticles composition and morphology were characterized using inductively coupled plasma mass spectrophotometer (ICP-MS), X-ray photoelectron spectroscopy (XPS), energy-dispersive X-ray fluorescence spectroscopy (EDS), X-ray diffraction (XRD), and transmission electron microscopy (TEM) techniques. Electrocatalytic activity towards the oxygen reduction reaction (ORR) and methanol tolerance in oxygen-saturated acid solution were determined. The bimetallic catalyst on carbon support synthetized by thermal reduction of the Pd2Co precursor has ORR electrocatalytic activity and a higher methanol tolerance than a Pt/C catalyst. PMID:24102312

  7. New Palladium-Catalyzed Approaches to Heterocycles and Carbocycles

    SciTech Connect

    Qinhua Huang

    2004-12-19

    The tert-butylimines of o-(1-alkynyl)benzaldehydes and analogous pyridinecarbaldehydes have been cyclized under very mild reaction conditions in the presence of I{sub 2}, ICl, PhSeCl, PhSCl and p-O{sub 2}NC{sub 6}H{sub 4}SCl to give the corresponding halogen-, selenium- and sulfur-containing disubstituted isoquinolines and naphthyridines, respectively. Monosubstituted isoquinolines and naphthyridines have been synthesized by the metal-catalyzed ring closure of these same iminoalkynes. This methodology accommodates a variety of iminoalkynes and affords the anticipated heterocycles in moderate to excellent yields. The Pd(II)-catalyzed cyclization of 2-(1-alkynyl)arylaldimines in the presence of various alkenes provides an efficient way to synthesize a variety of 4-(1-alkenyl)-3-arylisoquinolines in moderate to excellent yields. The introduction of an ortho-methoxy group on the arylaldimine promotes the Pd-catalyzed cyclization and stabilizes the resulting Pd(II) intermediate, improving the yields of the isoquinoline products. Highly substituted naphthalenes have been synthesized by the palladium-catalyzed annulation of a variety of internal alkynes, in which two new carbon-carbon bonds are formed in a single step under relatively mild reaction conditions. This method has also been used to synthesize carbazoles, although a higher reaction temperature is necessary. The process involves arylpalladation of the alkyne, followed by intramolecular Heck olefination and double bond isomerization. This method accommodates a variety of functional groups and affords the anticipated highly substituted naphthalenes and carbazoles in good to excellent yields. Novel palladium migratiodarylation methodology for the synthesis of complex fused polycycles has been developed, in which one or more sequential Pd-catalyzed intramolecular migration processes involving C-H activation are employed. The chemistry works best with electron-rich aromatics, which is in agreement with the idea that these palladium-catalyzed C-H activation reactions parallel electrophilic aromatic substitution. A relatively efficient synthesis of cyclopropanes has been developed using palladium-catalyzed C-H activation chemistry, in which two new carbon-carbon bonds are formed in a single step. This method involves the palladium-catalyzed activation of relatively unreactive C-H bonds, and provides a very efficient way to synthesize cyclopropapyrrolo[1,2-a]indoles, analogues of the mitomycin antibiotics.

  8. Palladium-Catalyzed Decarbonylative Dehydration of Fatty Acids for the Production of Linear Alpha Olefins

    PubMed Central

    Liu, Yiyang; Kim, Kelly E.; Herbert, Myles B.; Fedorov, Alexey; Grubbs, Robert H.; Stoltz, Brian M.

    2014-01-01

    A highly efficient palladium-catalyzed decarbonylative dehydration reaction of carboxylic acids is reported. This method transforms abundant and renewable even-numbered natural fatty acids into valuable and expensive odd-numbered alpha olefins. Additionally, the chemistry displays a high functional group tolerance. The process employs low loading of palladium catalyst and proceeds under solvent-free and relatively mild conditions. PMID:24772061

  9. Nano-size particles of palladium intermetallic compounds as catalysts for oxidative acetoxylation

    Microsoft Academic Search

    Takayuki Komatsu; Koichiro Inaba; Tomoyuki Uezono; Ayumu Onda; Tatsuaki Yashima

    2003-01-01

    Fine particles of palladium containing intermetallic compounds (IMCs) were prepared on the surface of silica gel and their catalytic properties for the oxidative acetoxylation of toluene and 1,3-butadiene (BD) were investigated. Intermetallic compounds were prepared on silica by the successive impregnation using aqueous solutions of palladium dichloride and a compound of the second metal. Through the reduction in hydrogen at

  10. DOI: 10.1002/celc.201402124 Biotemplated Palladium Catalysts Can Be Stabilized on

    E-print Network

    DOI: 10.1002/celc.201402124 Biotemplated Palladium Catalysts Can Be Stabilized on Different Support when expensive precious metal catalysts are utilized.[1] Conventional methods of catalyst formation an electrodeposited palladi- um control electrode or electrodes coated with a palladium/ Nafion catalyst ink

  11. ALLERGIC RESPONSE TO PLATINUM AND PALLADIUM COMPLEXES DETERMINATION OF NO-EFFECT LEVEL

    EPA Science Inventory

    Rabbits, guinea pigs and mice were subcutaneously injected with PtSO4 (with and without NH4Cl) and PdSO4 (with and without NH4Cl) in an attempt to sensitize the animals to platinum or palladium. No allergic induction was found. No allergic induction to platinum or palladium was f...

  12. Chemical binding energies of point defects in palladium doped with hydrogen and d impurities

    E-print Network

    Paris-Sud XI, Université de

    1001 Chemical binding energies of point defects in palladium doped with hydrogen and d impurities C calculate the chemical binding energy of a pair of hydrogen atoms in palladium within the infinite dilution metallic site between the two impurities. Also we determine the chemical binding energies between

  13. An electroless plating film of palladium on 304 stainless steel and its excellent corrosion resistance

    Microsoft Academic Search

    Y. Zuo; Junlei Tang; Chongzhi Fan; Yuming Tang; Jinping Xiong

    2008-01-01

    An uniform palladium film on 304 stainless steel was obtained by electroless plating. Scanning electronic microscopy, X-ray photoelectron spectroscopy, weight loss tests and electrochemical measurements were used to character the properties of the film. The palladium plated stainless steel samples showed excellent corrosion resistance in strong reductive corrosion mediums. In boiling dilute sulfuric acid solutions and boiling acetic\\/formic acids, corrosion

  14. Tritium production from a low voltage deuterium discharge on palladium and other metals

    Microsoft Academic Search

    T. N. Claytor; D. D. Jackson; D. G. Tuggle

    1995-01-01

    Over the past year the authors have been able to demonstrate that a plasma loading method produces an exciting and unexpected amount of tritium from small palladium wires. In contrast to electrochemical hydrogen or deuterium loading of palladium, this method yields a reproducible tritium generation rate when various electrical and physical conditions are met. Small diameter wires (100--250 microns) have

  15. Methane ignition catalyzed by in situ generated palladium nanoparticles T. Shimizu a

    E-print Network

    Anderson, Scott L.

    Methane ignition catalyzed by in situ generated palladium nanoparticles T. Shimizu a , A.D. Abid Accepted 13 July 2009 Available online 10 August 2009 Keywords: Catalytic combustion Ignition Gas ignition of methane over the surfaces of freely-suspended and in situ generated palladium nanoparticles

  16. Fast detection of hydrogen with nano fiber tapers coated with ultra thin palladium layers

    Microsoft Academic Search

    Joel Villatoro; David Monzón-Hernández

    2005-01-01

    We report a miniature hydrogen sensor that consists of a subwavelength diameter tapered optical fiber coated with an ultra thin palladium film. The optical properties of the palladium layer changes when the device is exposed to hydrogen. Consequently, the absorption of the evanescent waves also changes. The sensor was tested in a simple light transmission measurement setup that consisted of

  17. 9 CFR 113.118 - Pasteurella Multocida Bacterin, Avian Isolate, Type 3.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... false Pasteurella Multocida Bacterin, Avian Isolate, Type 3. 113.118 Section...118 Pasteurella Multocida Bacterin, Avian Isolate, Type 3. Pasteurella Multocida Bacterin, Avian Isolate, Type 3, shall be prepared...

  18. 37 CFR 1.18 - Patent post allowance (including issue) fees.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    37 Patents, Trademarks, and Copyrights 1 2011-07-01 2011-07-01 false Patent post allowance (including issue) fees. 1.18 Section 1.18 Patents, Trademarks, and Copyrights UNITED STATES PATENT AND TRADEMARK...

  19. 37 CFR 1.18 - Patent post allowance (including issue) fees.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    37 Patents, Trademarks, and Copyrights 1 2012-07-01 2012-07-01 false Patent post allowance (including issue) fees. 1.18 Section 1.18 Patents, Trademarks, and Copyrights UNITED STATES PATENT AND TRADEMARK...

  20. 37 CFR 1.18 - Patent post allowance (including issue) fees.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    37 Patents, Trademarks, and Copyrights 1 2010-07-01 2010-07-01 false Patent post allowance (including issue) fees. 1.18 Section 1.18 Patents, Trademarks, and Copyrights UNITED STATES PATENT AND TRADEMARK...

  1. 37 CFR 1.18 - Patent post allowance (including issue) fees.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    37 Patents, Trademarks, and Copyrights 1 2014-07-01 2014-07-01 false Patent post allowance (including issue) fees. 1.18 Section 1.18 Patents, Trademarks, and Copyrights UNITED STATES PATENT AND TRADEMARK...

  2. 37 CFR 1.18 - Patent post allowance (including issue) fees.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    37 Patents, Trademarks, and Copyrights 1 2013-07-01 2013-07-01 false Patent post allowance (including issue) fees. 1.18 Section 1.18 Patents, Trademarks, and Copyrights UNITED STATES PATENT AND TRADEMARK...

  3. 5 CFR 1201.118 - Board reopening of case and reconsideration of initial decision.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ...Board reopening of case and reconsideration of initial decision. 1201.118 Section 1201.118 Administrative Personnel MERIT SYSTEMS PROTECTION BOARD ORGANIZATION AND PROCEDURES PRACTICES AND PROCEDURES Petitions for Review of Initial...

  4. 46 CFR 118.420 - Pre-engineered fixed gas fire extinguishing systems.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ...2013-10-01 false Pre-engineered fixed gas fire extinguishing systems. 118.420 Section 118...OVERNIGHT ACCOMMODATIONS FOR MORE THAN 49 PASSENGERS FIRE PROTECTION EQUIPMENT Fixed Fire Extinguishing and Detecting Systems §...

  5. 46 CFR 118.420 - Pre-engineered fixed gas fire extinguishing systems.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ...2014-10-01 false Pre-engineered fixed gas fire extinguishing systems. 118.420 Section 118...OVERNIGHT ACCOMMODATIONS FOR MORE THAN 49 PASSENGERS FIRE PROTECTION EQUIPMENT Fixed Fire Extinguishing and Detecting Systems §...

  6. 40 CFR 81.118 - Southwest Missouri Intrastate Air Quality Control Region.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...2011-07-01 false Southwest Missouri Intrastate Air Quality Control Region. 81.118 Section 81...CONTINUED) DESIGNATION OF AREAS FOR AIR QUALITY PLANNING PURPOSES Designation of Air Quality Control Regions § 81.118...

  7. 24 CFR 904.118 - Homeowners association-planned unit development (PUD).

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    24 Housing and Urban Development 4 2010-04-01 2010-04-01...Homeowners association-planned unit development (PUD). 904.118 Section 904.118 Housing and Urban Development Regulations Relating to Housing...

  8. 41 CFR 102-118.410 - Can GSA suspend my agency's prepayment audit program?

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...suspend my agency's prepayment audit program? 102-118.410 Section...Property Management Regulations System (Continued) FEDERAL MANAGEMENT...118-TRANSPORTATION PAYMENT AND AUDIT Prepayment Audits of Transportation Services...

  9. 41 CFR 102-118.325 - Must I get approval for my agency's prepayment audit program?

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...approval for my agency's prepayment audit program? 102-118.325 Section...Property Management Regulations System (Continued) FEDERAL MANAGEMENT...118-TRANSPORTATION PAYMENT AND AUDIT Prepayment Audits of Transportation Services...

  10. 41 CFR 102-118.330 - What are the elements of an acceptable prepayment audit program?

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...acceptable prepayment audit program? 102-118...Management Regulations System (Continued) FEDERAL...118-TRANSPORTATION PAYMENT AND AUDIT Prepayment Audits of...forwarded to the GSA Audit Division; and (j...unique agency numbering system to handle commercial...

  11. 41 CFR 102-118.280 - What advantages does the prepayment audit offer my agency?

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...What advantages does the prepayment audit offer my agency? 102-118...Property Management Regulations System (Continued) FEDERAL MANAGEMENT...118-TRANSPORTATION PAYMENT AND AUDIT Prepayment Audits of Transportation Services...

  12. 41 CFR 102-118.10 - What is a transportation audit?

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...false What is a transportation audit? 102-118.10 Section...Property Management Regulations System (Continued) FEDERAL MANAGEMENT...118-TRANSPORTATION PAYMENT AND AUDIT General Introduction ...10 What is a transportation audit? A transportation...

  13. 41 CFR 102-118.270 - Must my agency establish a prepayment audit program?

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...my agency establish a prepayment audit program? 102-118.270 Section...Property Management Regulations System (Continued) FEDERAL MANAGEMENT...118-TRANSPORTATION PAYMENT AND AUDIT Prepayment Audits of Transportation Services...

  14. 41 CFR 102-118.340 - How does my agency contact the GSA Audit Division?

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...How does my agency contact the GSA Audit Division? 102-118.340 ...Property Management Regulations System (Continued) FEDERAL MANAGEMENT...118-TRANSPORTATION PAYMENT AND AUDIT Prepayment Audits of Transportation Services...

  15. 41 CFR 102-118.300 - How does my agency fund its prepayment audit program?

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...does my agency fund its prepayment audit program? 102-118.300 Section...Property Management Regulations System (Continued) FEDERAL MANAGEMENT...118-TRANSPORTATION PAYMENT AND AUDIT Prepayment Audits of Transportation Services...

  16. 34 CFR 300.118 - Children in public or private institutions.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...false Children in public or private institutions. 300.118 Section 300...118 Children in public or private institutions. Except as provided...arrangements with public and private institutions (such as a memorandum...

  17. 21 CFR 118.10 - Recordkeeping requirements for the Salmonella Enteritidis (SE) prevention plan.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ...2010-04-01 false Recordkeeping requirements for the Salmonella Enteritidis (SE) prevention plan. 118.10 Section...118.10 Recordkeeping requirements for the Salmonella Enteritidis (SE) prevention plan. (a) Records:...

  18. 33 CFR 100.118 - Searsport Lobster Boat Races, Searsport Harbor, ME.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...2010-07-01 false Searsport Lobster Boat Races, Searsport Harbor, ME. 100.118... § 100.118 Searsport Lobster Boat Races, Searsport Harbor, ME. (a) Regulated...commander may delay, modify, or cancel the race as conditions or circumstances...

  19. 32 CFR 219.118 - Applications and proposals lacking definite plans for involvement of human subjects.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...lacking definite plans for involvement of human subjects. 219.118 Section 219...CONTINUED) MISCELLANEOUS PROTECTION OF HUMAN SUBJECTS § 219.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

  20. 32 CFR 219.118 - Applications and proposals lacking definite plans for involvement of human subjects.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...lacking definite plans for involvement of human subjects. 219.118 Section 219...CONTINUED) MISCELLANEOUS PROTECTION OF HUMAN SUBJECTS § 219.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

  1. 22 CFR 225.118 - Applications and proposals lacking definite plans for involvement of human subjects.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ...lacking definite plans for involvement of human subjects. 225.118 Section 225...INTERNATIONAL DEVELOPMENT PROTECTION OF HUMAN SUBJECTS § 225.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

  2. 22 CFR 225.118 - Applications and proposals lacking definite plans for involvement of human subjects.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ...lacking definite plans for involvement of human subjects. 225.118 Section 225...INTERNATIONAL DEVELOPMENT PROTECTION OF HUMAN SUBJECTS § 225.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

  3. 22 CFR 225.118 - Applications and proposals lacking definite plans for involvement of human subjects.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ...lacking definite plans for involvement of human subjects. 225.118 Section 225...INTERNATIONAL DEVELOPMENT PROTECTION OF HUMAN SUBJECTS § 225.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

  4. 16 CFR 1028.118 - Applications and proposals lacking definite plans for involvement of human subjects.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ...lacking definite plans for involvement of human subjects. 1028.118 Section 1028...SAFETY COMMISSION GENERAL PROTECTION OF HUMAN SUBJECTS § 1028.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

  5. 10 CFR 745.118 - Applications and proposals lacking definite plans for involvement of human subjects.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ...lacking definite plans for involvement of human subjects. 745.118 Section 745... DEPARTMENT OF ENERGY PROTECTION OF HUMAN SUBJECTS § 745.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

  6. 14 CFR 1230.118 - Applications and proposals lacking definite plans for involvement of human subjects.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ...lacking definite plans for involvement of human subjects. 1230.118 Section 1230...AND SPACE ADMINISTRATION PROTECTION OF HUMAN SUBJECTS § 1230.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

  7. 16 CFR 1028.118 - Applications and proposals lacking definite plans for involvement of human subjects.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ...lacking definite plans for involvement of human subjects. 1028.118 Section 1028...SAFETY COMMISSION GENERAL PROTECTION OF HUMAN SUBJECTS § 1028.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

  8. 32 CFR 219.118 - Applications and proposals lacking definite plans for involvement of human subjects.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...lacking definite plans for involvement of human subjects. 219.118 Section 219...CONTINUED) MISCELLANEOUS PROTECTION OF HUMAN SUBJECTS § 219.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

  9. 45 CFR 690.118 - Applications and proposals lacking definite plans for involvement of human subjects.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ...lacking definite plans for involvement of human subjects. 690.118 Section 690...NATIONAL SCIENCE FOUNDATION PROTECTION OF HUMAN SUBJECTS § 690.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

  10. 32 CFR 219.118 - Applications and proposals lacking definite plans for involvement of human subjects.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...lacking definite plans for involvement of human subjects. 219.118 Section 219...CONTINUED) MISCELLANEOUS PROTECTION OF HUMAN SUBJECTS § 219.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

  11. 10 CFR 745.118 - Applications and proposals lacking definite plans for involvement of human subjects.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ...lacking definite plans for involvement of human subjects. 745.118 Section 745... DEPARTMENT OF ENERGY PROTECTION OF HUMAN SUBJECTS § 745.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

  12. 14 CFR 1230.118 - Applications and proposals lacking definite plans for involvement of human subjects.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ...lacking definite plans for involvement of human subjects. 1230.118 Section 1230...AND SPACE ADMINISTRATION PROTECTION OF HUMAN SUBJECTS § 1230.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

  13. 10 CFR 745.118 - Applications and proposals lacking definite plans for involvement of human subjects.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ...lacking definite plans for involvement of human subjects. 745.118 Section 745... DEPARTMENT OF ENERGY PROTECTION OF HUMAN SUBJECTS § 745.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

  14. 32 CFR 219.118 - Applications and proposals lacking definite plans for involvement of human subjects.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...lacking definite plans for involvement of human subjects. 219.118 Section 219...CONTINUED) MISCELLANEOUS PROTECTION OF HUMAN SUBJECTS § 219.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

  15. 45 CFR 690.118 - Applications and proposals lacking definite plans for involvement of human subjects.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ...lacking definite plans for involvement of human subjects. 690.118 Section 690...NATIONAL SCIENCE FOUNDATION PROTECTION OF HUMAN SUBJECTS § 690.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

  16. 16 CFR 1028.118 - Applications and proposals lacking definite plans for involvement of human subjects.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ...lacking definite plans for involvement of human subjects. 1028.118 Section 1028...SAFETY COMMISSION GENERAL PROTECTION OF HUMAN SUBJECTS § 1028.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

  17. 10 CFR 745.118 - Applications and proposals lacking definite plans for involvement of human subjects.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ...lacking definite plans for involvement of human subjects. 745.118 Section 745... DEPARTMENT OF ENERGY PROTECTION OF HUMAN SUBJECTS § 745.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

  18. 16 CFR 1028.118 - Applications and proposals lacking definite plans for involvement of human subjects.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ...lacking definite plans for involvement of human subjects. 1028.118 Section 1028...SAFETY COMMISSION GENERAL PROTECTION OF HUMAN SUBJECTS § 1028.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

  19. 14 CFR 1230.118 - Applications and proposals lacking definite plans for involvement of human subjects.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ...lacking definite plans for involvement of human subjects. 1230.118 Section 1230...AND SPACE ADMINISTRATION PROTECTION OF HUMAN SUBJECTS § 1230.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

  20. 22 CFR 225.118 - Applications and proposals lacking definite plans for involvement of human subjects.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ...lacking definite plans for involvement of human subjects. 225.118 Section 225...INTERNATIONAL DEVELOPMENT PROTECTION OF HUMAN SUBJECTS § 225.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

  1. 10 CFR 745.118 - Applications and proposals lacking definite plans for involvement of human subjects.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ...lacking definite plans for involvement of human subjects. 745.118 Section 745... DEPARTMENT OF ENERGY PROTECTION OF HUMAN SUBJECTS § 745.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

  2. 45 CFR 690.118 - Applications and proposals lacking definite plans for involvement of human subjects.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ...lacking definite plans for involvement of human subjects. 690.118 Section 690...NATIONAL SCIENCE FOUNDATION PROTECTION OF HUMAN SUBJECTS § 690.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

  3. 16 CFR 1028.118 - Applications and proposals lacking definite plans for involvement of human subjects.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ...lacking definite plans for involvement of human subjects. 1028.118 Section 1028...SAFETY COMMISSION GENERAL PROTECTION OF HUMAN SUBJECTS § 1028.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

  4. 22 CFR 225.118 - Applications and proposals lacking definite plans for involvement of human subjects.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ...lacking definite plans for involvement of human subjects. 225.118 Section 225...INTERNATIONAL DEVELOPMENT PROTECTION OF HUMAN SUBJECTS § 225.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

  5. 45 CFR 690.118 - Applications and proposals lacking definite plans for involvement of human subjects.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ...lacking definite plans for involvement of human subjects. 690.118 Section 690...NATIONAL SCIENCE FOUNDATION PROTECTION OF HUMAN SUBJECTS § 690.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

  6. 45 CFR 690.118 - Applications and proposals lacking definite plans for involvement of human subjects.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...lacking definite plans for involvement of human subjects. 690.118 Section 690...NATIONAL SCIENCE FOUNDATION PROTECTION OF HUMAN SUBJECTS § 690.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

  7. 14 CFR 1230.118 - Applications and proposals lacking definite plans for involvement of human subjects.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ...lacking definite plans for involvement of human subjects. 1230.118 Section 1230...AND SPACE ADMINISTRATION PROTECTION OF HUMAN SUBJECTS § 1230.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

  8. 24 CFR 904.118 - Homeowners association-planned unit development (PUD).

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    24 Housing and Urban Development 4 2011-04-01 2011-04-01...Homeowners association-planned unit development (PUD). 904.118 Section 904.118 Housing and Urban Development REGULATIONS RELATING TO HOUSING...

  9. 41 CFR 102-118.55 - What administrative procedures must my agency establish for payment of freight, household goods...

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ...payment of freight, household goods, or other transportation services? 102-118.55 Section 102-118...Continued) FEDERAL MANAGEMENT REGULATION TRANSPORTATION 118-TRANSPORTATION PAYMENT AND AUDIT Ordering and Paying...

  10. 41 CFR 102-118.55 - What administrative procedures must my agency establish for payment of freight, household goods...

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...payment of freight, household goods, or other transportation services? 102-118.55 Section 102-118...Continued) FEDERAL MANAGEMENT REGULATION TRANSPORTATION 118-TRANSPORTATION PAYMENT AND AUDIT Ordering and Paying...

  11. 41 CFR 102-118.160 - Who is liable if my agency makes an overpayment on a transportation bill?

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ...liable if my agency makes an overpayment on a transportation bill? 102-118.160 Section 102-118...Continued) FEDERAL MANAGEMENT REGULATION TRANSPORTATION 118-TRANSPORTATION PAYMENT AND AUDIT Ordering and Paying...

  12. 41 CFR 102-118.110 - Where can I find the rules governing the use of a Government Transportation Request?

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ...the rules governing the use of a Government Transportation Request? 102-118.110 Section 102-118...Continued) FEDERAL MANAGEMENT REGULATION TRANSPORTATION 118-TRANSPORTATION PAYMENT AND AUDIT Ordering and Paying...

  13. 41 CFR 102-118.145 - Where are the mandatory terms and conditions governing the use of passenger transportation...

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ...and conditions governing the use of passenger transportation documents? 102-118.145 Section 102-118...Continued) FEDERAL MANAGEMENT REGULATION TRANSPORTATION 118-TRANSPORTATION PAYMENT AND AUDIT Ordering and Paying...

  14. 41 CFR 102-118.145 - Where are the mandatory terms and conditions governing the use of passenger transportation...

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...and conditions governing the use of passenger transportation documents? 102-118.145 Section 102-118...Continued) FEDERAL MANAGEMENT REGULATION TRANSPORTATION 118-TRANSPORTATION PAYMENT AND AUDIT Ordering and Paying...

  15. 41 CFR 102-118.160 - Who is liable if my agency makes an overpayment on a transportation bill?

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...liable if my agency makes an overpayment on a transportation bill? 102-118.160 Section 102-118...Continued) FEDERAL MANAGEMENT REGULATION TRANSPORTATION 118-TRANSPORTATION PAYMENT AND AUDIT Ordering and Paying...

  16. 41 CFR 102-118.150 - What are the major mandatory terms and conditions governing the use of passenger transportation...

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ...and conditions governing the use of passenger transportation documents? 102-118.150 Section 102-118...Continued) FEDERAL MANAGEMENT REGULATION TRANSPORTATION 118-TRANSPORTATION PAYMENT AND AUDIT Ordering and Paying...

  17. 41 CFR 102-118.150 - What are the major mandatory terms and conditions governing the use of passenger transportation...

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...and conditions governing the use of passenger transportation documents? 102-118.150 Section 102-118...Continued) FEDERAL MANAGEMENT REGULATION TRANSPORTATION 118-TRANSPORTATION PAYMENT AND AUDIT Ordering and Paying...

  18. 41 CFR 102-118.145 - Where are the mandatory terms and conditions governing the use of passenger transportation...

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...and conditions governing the use of passenger transportation documents? 102-118.145 Section 102-118...Continued) FEDERAL MANAGEMENT REGULATION TRANSPORTATION 118-TRANSPORTATION PAYMENT AND AUDIT Ordering and Paying...

  19. 41 CFR 102-118.150 - What are the major mandatory terms and conditions governing the use of passenger transportation...

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ...and conditions governing the use of passenger transportation documents? 102-118.150 Section 102-118...Continued) FEDERAL MANAGEMENT REGULATION TRANSPORTATION 118-TRANSPORTATION PAYMENT AND AUDIT Ordering and Paying...

  20. 41 CFR 102-118.55 - What administrative procedures must my agency establish for payment of freight, household goods...

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ...payment of freight, household goods, or other transportation services? 102-118.55 Section 102-118...Continued) FEDERAL MANAGEMENT REGULATION TRANSPORTATION 118-TRANSPORTATION PAYMENT AND AUDIT Ordering and Paying...

  1. 41 CFR 102-118.145 - Where are the mandatory terms and conditions governing the use of passenger transportation...

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ...and conditions governing the use of passenger transportation documents? 102-118.145 Section 102-118...Continued) FEDERAL MANAGEMENT REGULATION TRANSPORTATION 118-TRANSPORTATION PAYMENT AND AUDIT Ordering and Paying...

  2. 41 CFR 102-118.55 - What administrative procedures must my agency establish for payment of freight, household goods...

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ...payment of freight, household goods, or other transportation services? 102-118.55 Section 102-118...Continued) FEDERAL MANAGEMENT REGULATION TRANSPORTATION 118-TRANSPORTATION PAYMENT AND AUDIT Ordering and Paying...

  3. 41 CFR 102-118.145 - Where are the mandatory terms and conditions governing the use of passenger transportation...

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ...and conditions governing the use of passenger transportation documents? 102-118.145 Section 102-118...Continued) FEDERAL MANAGEMENT REGULATION TRANSPORTATION 118-TRANSPORTATION PAYMENT AND AUDIT Ordering and Paying...

  4. 41 CFR 102-118.150 - What are the major mandatory terms and conditions governing the use of passenger transportation...

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ...and conditions governing the use of passenger transportation documents? 102-118.150 Section 102-118...Continued) FEDERAL MANAGEMENT REGULATION TRANSPORTATION 118-TRANSPORTATION PAYMENT AND AUDIT Ordering and Paying...

  5. 41 CFR 102-118.160 - Who is liable if my agency makes an overpayment on a transportation bill?

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ...liable if my agency makes an overpayment on a transportation bill? 102-118.160 Section 102-118...Continued) FEDERAL MANAGEMENT REGULATION TRANSPORTATION 118-TRANSPORTATION PAYMENT AND AUDIT Ordering and Paying...

  6. 41 CFR 102-118.110 - Where can I find the rules governing the use of a Government Transportation Request?

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...the rules governing the use of a Government Transportation Request? 102-118.110 Section 102-118...Continued) FEDERAL MANAGEMENT REGULATION TRANSPORTATION 118-TRANSPORTATION PAYMENT AND AUDIT Ordering and Paying...

  7. 41 CFR 102-118.110 - Where can I find the rules governing the use of a Government Transportation Request?

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ...the rules governing the use of a Government Transportation Request? 102-118.110 Section 102-118...Continued) FEDERAL MANAGEMENT REGULATION TRANSPORTATION 118-TRANSPORTATION PAYMENT AND AUDIT Ordering and Paying...

  8. 41 CFR 102-118.160 - Who is liable if my agency makes an overpayment on a transportation bill?

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...liable if my agency makes an overpayment on a transportation bill? 102-118.160 Section 102-118...Continued) FEDERAL MANAGEMENT REGULATION TRANSPORTATION 118-TRANSPORTATION PAYMENT AND AUDIT Ordering and Paying...

  9. 41 CFR 102-118.150 - What are the major mandatory terms and conditions governing the use of passenger transportation...

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...and conditions governing the use of passenger transportation documents? 102-118.150 Section 102-118...Continued) FEDERAL MANAGEMENT REGULATION TRANSPORTATION 118-TRANSPORTATION PAYMENT AND AUDIT Ordering and Paying...

  10. 41 CFR 102-118.55 - What administrative procedures must my agency establish for payment of freight, household goods...

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...payment of freight, household goods, or other transportation services? 102-118.55 Section 102-118...Continued) FEDERAL MANAGEMENT REGULATION TRANSPORTATION 118-TRANSPORTATION PAYMENT AND AUDIT Ordering and Paying...

  11. 41 CFR 102-118.665 - May my agency appeal a postpayment audit decision by the CBCA?

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...my agency appeal a postpayment audit decision by the CBCA? 102-118...Property Management Regulations System (Continued) FEDERAL MANAGEMENT...118-TRANSPORTATION PAYMENT AND AUDIT Claims and Appeal Procedures...Appeal Procedures for Postpayment Audits § 102-118.665 May...

  12. 41 CFR 102-118.320 - What information must be on transportation bills that have completed my agency's prepayment audit?

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...completed my agency's prepayment audit? 102-118.320 Section 102-118...Property Management Regulations System (Continued) FEDERAL MANAGEMENT...118-TRANSPORTATION PAYMENT AND AUDIT Prepayment Audits of Transportation Services...

  13. 41 CFR 102-118.295 - What are the limited exceptions to every bill undergoing a prepayment audit?

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...every bill undergoing a prepayment audit? 102-118.295 Section 102-118...Property Management Regulations System (Continued) FEDERAL MANAGEMENT...118-TRANSPORTATION PAYMENT AND AUDIT Prepayment Audits of Transportation Services...

  14. 41 CFR 102-118.290 - Must every electronic and paper transportation bill undergo a prepayment audit?

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...transportation bill undergo a prepayment audit? 102-118.290 Section 102-118...Property Management Regulations System (Continued) FEDERAL MANAGEMENT...118-TRANSPORTATION PAYMENT AND AUDIT Prepayment Audits of Transportation Services...

  15. 41 CFR 102-118.360 - What relief from liability is available for the certifying official under a postpayment audit?

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...certifying official under a postpayment audit? 102-118.360 Section 102-118...Property Management Regulations System (Continued) FEDERAL MANAGEMENT...118-TRANSPORTATION PAYMENT AND AUDIT Prepayment Audits of Transportation Services...

  16. 41 CFR 102-118.595 - May my agency appeal a prepayment audit decision by the CBCA?

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...my agency appeal a prepayment audit decision by the CBCA? 102-118...Property Management Regulations System (Continued) FEDERAL MANAGEMENT...118-TRANSPORTATION PAYMENT AND AUDIT Claims and Appeal Procedures...Appeal Procedures for Prepayment Audits § 102-118.595 May...

  17. 41 CFR 102-118.430 - What information must be on my agency's transportation bills submitted for a postpayment audit?

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...submitted for a postpayment audit? 102-118.430 Section...Property Management Regulations System (Continued) FEDERAL MANAGEMENT...118-TRANSPORTATION PAYMENT AND AUDIT Postpayment Transportation Audits § 102-118.430...

  18. Interstitial modification of palladium nanoparticles with boron atoms as a green catalyst for selective hydrogenation

    NASA Astrophysics Data System (ADS)

    Chan, Chun Wong Aaron; Mahadi, Abdul Hanif; Li, Molly Meng-Jung; Corbos, Elena Cristina; Tang, Chiu; Jones, Glenn; Kuo, Winson Chun Hsin; Cookson, James; Brown, Christopher Michael; Bishop, Peter Trenton; Tsang, Shik Chi Edman

    2014-12-01

    Lindlar catalysts comprising of palladium/calcium carbonate modified with lead acetate and quinoline are widely employed industrially for the partial hydrogenation of alkynes. However, their use is restricted, particularly for food, cosmetic and drug manufacture, due to the extremely toxic nature of lead, and the risk of its leaching from catalyst surface. In addition, the catalysts also exhibit poor selectivities in a number of cases. Here we report that a non-surface modification of palladium gives rise to the formation of an ultra-selective nanocatalyst. Boron atoms are found to take residence in palladium interstitial lattice sites with good chemical and thermal stability. This is favoured due to a strong host–guest electronic interaction when supported palladium nanoparticles are treated with a borane tetrahydrofuran solution. The adsorptive properties of palladium are modified by the subsurface boron atoms and display ultra-selectivity in a number of challenging alkyne hydrogenation reactions, which outclass the performance of Lindlar catalysts.

  19. Interstitial modification of palladium nanoparticles with boron atoms as a green catalyst for selective hydrogenation.

    PubMed

    Chan, Chun Wong Aaron; Mahadi, Abdul Hanif; Li, Molly Meng-Jung; Corbos, Elena Cristina; Tang, Chiu; Jones, Glenn; Kuo, Winson Chun Hsin; Cookson, James; Brown, Christopher Michael; Bishop, Peter Trenton; Tsang, Shik Chi Edman

    2014-01-01

    Lindlar catalysts comprising of palladium/calcium carbonate modified with lead acetate and quinoline are widely employed industrially for the partial hydrogenation of alkynes. However, their use is restricted, particularly for food, cosmetic and drug manufacture, due to the extremely toxic nature of lead, and the risk of its leaching from catalyst surface. In addition, the catalysts also exhibit poor selectivities in a number of cases. Here we report that a non-surface modification of palladium gives rise to the formation of an ultra-selective nanocatalyst. Boron atoms are found to take residence in palladium interstitial lattice sites with good chemical and thermal stability. This is favoured due to a strong host-guest electronic interaction when supported palladium nanoparticles are treated with a borane tetrahydrofuran solution. The adsorptive properties of palladium are modified by the subsurface boron atoms and display ultra-selectivity in a number of challenging alkyne hydrogenation reactions, which outclass the performance of Lindlar catalysts. PMID:25523894

  20. 21 CFR 118.1 - Persons covered by the requirements in this part.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ...as defined in § 118.3, you must comply only with the refrigeration requirements in § 118.4(e) for production of eggs on...processing or egg products facilities, you must comply with the refrigeration requirements in § 118.4(e). This section applies...

  1. 21 CFR 118.1 - Persons covered by the requirements in this part.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ...as defined in § 118.3, you must comply only with the refrigeration requirements in § 118.4(e) for production of eggs on...processing or egg products facilities, you must comply with the refrigeration requirements in § 118.4(e). This section applies...

  2. 21 CFR 118.1 - Persons covered by the requirements in this part.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ...as defined in § 118.3, you must comply only with the refrigeration requirements in § 118.4(e) for production of eggs on...processing or egg products facilities, you must comply with the refrigeration requirements in § 118.4(e). This section applies...

  3. 27 CFR 46.118 - Certificate in lieu of lost or destroyed special tax stamp.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ...in lieu of lost or destroyed special tax stamp. 46.118 Section 46.118 Alcohol...Special (Occupational) Tax Special Tax Stamps § 46.118 Certificate in lieu of lost or destroyed special tax stamp. The provisions of this subpart...

  4. Severity Indices of Personality Problems (SIPP-118) in Adolescents: Reliability and Validity

    ERIC Educational Resources Information Center

    Feenstra, Dine J.; Hutsebaut, Joost; Verheul, Roel; Busschbach, Jan J. V.

    2011-01-01

    The Severity Indices of Personality Problems (SIPP-118; Verheul et al., 2008) is a self-report questionnaire focusing on core components of (mal)adaptive personality functioning. The SIPP-118 was developed and validated in an adult population. In adult populations, the 16 facets of the SIPP-118 fit into 5 higher order domains: self-control,…

  5. 41 CFR 102-118.240 - How does my agency get GBL and GTR forms?

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...2010-07-01 false How does my agency get GBL and GTR forms? 102-118.240 Section 102-118... § 102-118.240 How does my agency get GBL and GTR forms? Your agency can get GBL and GTR forms, in either blank or...

  6. 41 CFR 102-118.115 - Must my agency use a GBL?

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...2010-07-01 false Must my agency use a GBL? 102-118.115 Section 102-118.115...Services § 102-118.115 Must my agency use a GBL? No, your agency is not required to use a GBL and must use commercial payment...

  7. Life as a sober citizen: Aldo Leopold's Wildlife Ecology 118

    NASA Astrophysics Data System (ADS)

    Theiss, Nancy Stearns

    This historic case study addressed the issue of the lack of citizen action toward environmentally responsible behavior. Although there have been studies regarding components of environmental responsible behavior [ERB], there has been little focus on historic models of exemplary figures of ERB. This study examined one of the first conservation courses in the United States, Wildlife Ecology 118, taught by Aldo Leopold (1887--1948) for 13 years at the University of Wisconsin. Today, Aldo Leopold is recognized as an exemplary conservationist whose land ethic is cited as providing the ecological approach needed for understanding the complex issues of modern society. The researcher conjectured that examination of one of the first environmental education courses could support and strengthen environmental education practices by providing a heuristic perspective. The researcher used two different strategies for analysis of the case. For Research Question One---"What were Leopold's teaching strategies in Wildlife Ecology 118?"---the researcher used methods of comparative historical analysis. The researcher examined the learning outcomes that Leopold used in Wildlife Ecology 118 and compared them against a rubric of the Four Strands for Environmental Education (North American Association for Environmental Education [NAAEE], 1999). The Four Strands for Environmental Education are the current teaching strategies used by educators. The results indicated that Wildlife Ecology 118 scored high in Knowledge of Processes and Systems and Environmental Problem Solving strands. Leopold relied on historic case examples and animal biographies to build stories that engaged students. Field trips gave students practical experience for environmental knowledge with special emphasis on phenology. For Research Question Two---"What was the context of the lessons in Wildlife Ecology 118?"---the researcher used environmental history methods for analysis. Context provided the knowledge and understanding of Leopold's choices for developing lessons that he thought would engage students to become environmentally responsible citizens. The contexts were grouped into four categories: (a) work and research related, (b) professional development, (c) leisure and, (d) public service. There were five themes that emerged from the course contexts: (a) case histories, (b) animal biographies, (c) phenology application, (d) food chains, and (e) ecosystems. The results of the study indicated that Wildlife Ecology 118 ranks high in areas of environmental problem solving and knowledge of processes and systems. Both of the areas are often difficult for educators to incorporate in their lessons. Through case histories, animal biographies, phenology, ecological diagrams, ecosystem comparisons and field trips, Leopold provides many examples that can be easily updated and used in current classroom practices, both in K--12 and college levels.

  8. 41 CFR 102-118.80 - Who is responsible for keeping my agency's electronic commerce transportation billing records?

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...for keeping my agency's electronic commerce transportation billing records? 102-118.80 Section...Continued) FEDERAL MANAGEMENT REGULATION TRANSPORTATION 118-TRANSPORTATION PAYMENT AND AUDIT Ordering and Paying...

  9. 41 CFR 102-118.80 - Who is responsible for keeping my agency's electronic commerce transportation billing records?

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ...for keeping my agency's electronic commerce transportation billing records? 102-118.80 Section...Continued) FEDERAL MANAGEMENT REGULATION TRANSPORTATION 118-TRANSPORTATION PAYMENT AND AUDIT Ordering and Paying...

  10. 41 CFR 102-118.80 - Who is responsible for keeping my agency's electronic commerce transportation billing records?

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ...for keeping my agency's electronic commerce transportation billing records? 102-118.80 Section...Continued) FEDERAL MANAGEMENT REGULATION TRANSPORTATION 118-TRANSPORTATION PAYMENT AND AUDIT Ordering and Paying...

  11. 41 CFR 102-118.415 - Will the widespread mandatory use of prepayment audits eliminate postpayment audits?

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...widespread mandatory use of prepayment audits eliminate postpayment audits? 102-118.415 Section...Property Management Regulations System (Continued) FEDERAL MANAGEMENT...118-TRANSPORTATION PAYMENT AND AUDIT Postpayment...

  12. A 77-118 GHz resonance-free Septum polarizer

    NASA Astrophysics Data System (ADS)

    Chen, Yen-Lin; Teng, Hsiao-Feng; Chiueh, Tzihong

    2014-07-01

    Challenging the conventional bandwidth limit, we design an extremely wide-band circular waveguide septum polarizer, covering 42% bandwidth, from 77 GHz to 118 GHz, without any high-order resonance. The performance of this polarizer has been verified in between 75 GHz and 115 GHz. The Stokes parameters constructed from the measured data show that the leakages from I to Q are below ±2% and the Q U mutual leakage below ±1%. This result removes the major weakness of the septum polarizer and opens up a new domain of astronomical instrumentation for polarization measurement. Despite this polarizer is designed to cover 77-118 GHz, it can be straightforwardly downsized to cover higher frequencies with minor change. The measurement result of a G-band (140-220 GHz) polarizer is also presented.

  13. STS-118 Astronaut Dave Williams Trains Using Virtual Reality Hardware

    NASA Technical Reports Server (NTRS)

    2007-01-01

    STS-118 astronaut and mission specialist Dafydd R. 'Dave' Williams, representing the Canadian Space Agency, uses Virtual Reality Hardware in the Space Vehicle Mock Up Facility at the Johnson Space Center to rehearse some of his duties for the upcoming mission. This type of virtual reality training allows the astronauts to wear special gloves and other gear while looking at a computer that displays simulating actual movements around the various locations on the station hardware which with they will be working.

  14. 118. Photographic copy of drawing (undated, original drawing in Archives, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    118. Photographic copy of drawing (undated, original drawing in Archives, Office of the Building, Administration Building, Sears, Roebuck and Company Mail Order Plant, Chicago, Illinois). Larsen-Wulff Architects. 1/16 inch to one foot. Drawing of the entire floor plan from Homan Avenue to Central Park Avenue, probably traced in the 1970's or early 1980's. FOURTH FLOOR PLAN - WEST HALF - Sears Roebuck & Company Mail Order Plant, Merchandise Building, 924 South Homan Avenue, Chicago, Cook County, IL

  15. Probable cluster decays from $^{270-318}$118 superheavy nuclei

    E-print Network

    K. P. Santhosh; B. Priyanka

    2014-09-02

    The cluster decay process in $^{270-318}$118 superheavy nuclei has been studied extensively within the Coulomb and proximity potential model (CPPM), thereby investigating the probable cluster decays from the various isotopes of $Z = 118$. On comparing the predicted decay half lives with the values evaluated using the Universal formula for cluster decay (UNIV) of Poenaru et al., the Universal Decay Law (UDL) of Qi et al., and the Scaling Law of Horoi et al., it was seen that, our values matches well with these theoretical values. A comparison of the predicted alpha decay half life of the experimentally synthesized superheavy isotope $^{294}$118 with its corresponding experimental value shows that, our theoretical value is in good agreement with the experimental value. The plots for $log_{10}(T_{1/2})$ against the neutron number of the daughter in the corresponding decay reveals the behavior of the cluster half lives with the neutron number of the daughter nuclei and for most of the decays, the half life was found to be the minimum for the decay leading to a daughter with $N = 184$. Most of the predicted half lives are well within the present experimental upper limit ($10^{30}$s) and lower limit ($10^{-6}$s) for measurements and hence these predictions may be of great use for further experimental investigation on cluster decay in the superheavy region.

  16. Luminescent Cyclometalated Platinum and Palladium Complexes with Novel Photophysical Properties

    NASA Astrophysics Data System (ADS)

    Turner, Eric

    Organic light emitting diodes (OLEDs) is a rapidly emerging technology based on organic thin film semiconductors. Recently, there has been substantial investment in their use in displays. In less than a decade, OLEDs have grown from a promising academic curiosity into a multi-billion dollar global industry. At the heart of an OLED are emissive molecules that generate light in response to electrical stimulation. Ideal emitters are efficient, compatible with existing materials, long lived, and produce light predominantly at useful wavelengths. Developing an understanding of the photophysical processes that dictate the luminescent properties of emissive materials is vital to their continued development. Chapter 1 and Chapter 2 provide an introduction to the topics presented and the laboratory methods used to explore them. Chapter 3 discusses a series of tridentate platinum complexes. A synthetic method utilizing microwave irradiation was explored, as well as a study of the effects ligand structure had on the excited state properties. Results and techniques developed in this endeavor were used as a foundation for the work undertaken in later chapters. Chapter 4 introduces a series of tetradentate platinum complexes that share a phenoxy-pyridyl (popy) motif. The new molecular design improved efficiency through increased rigidity and modification of the excited state properties. This class of platinum complexes were markedly more efficient than those presented in Chapter 3, and devices employing a green emitting complex of the series achieved nearly 100% electron-to-photon conversion efficiency in an OLED device. Chapter 5 adapts the ligand structure developed in Chapter 4 to palladium. The resulting complexes exceed reported efficiencies of palladium complexes by an order of magnitude. This chapter also provides the first report of a palladium complex as an emitter in an OLED device. Chapter 6 discusses the continuation of development efforts to include carbazolyl components in the ligand. These complexes possess interesting luminescent properties including ultra-narrow emission and metal assisted delayed fluorescence (MADF) emission.

  17. Detecting Airborne Mercury by Use of Palladium Chloride

    NASA Technical Reports Server (NTRS)

    Ryan, Margaret; Shevade, Abhijit; Kisor, Adam; Homer, Margie; Jewell, April; Manatt, Kenneth; Torres, Julia; Soler, Jessica; Taylor, Charles

    2009-01-01

    Palladium chloride films have been found to be useful as alternatives to the gold films heretofore used to detect airborne elemental mercury at concentrations of the order of parts per billion (ppb). Somewhat more specifically, when suitably prepared palladium chloride films are exposed to parts-per-billion or larger concentrations of airborne mercury, their electrical resistances change by amounts large enough to be easily measurable. Because airborne mercury adversely affects health, it is desirable to be able to detect it with high sensitivity, especially in enclosed environments in which there is a risk of leakage of mercury from lamps or other equipment. The detection of mercury by use of gold films involves the formation of gold/mercury amalgam. Gold films offer adequate sensitivity for detection of airborne mercury and could easily be integrated into an electronic-nose system designed to operate in the temperature range of 23 to 28 C. Unfortunately, in order to regenerate a gold-film mercury sensor, one must heat it to a temperature of 200 C for several minutes in clean flowing air. In preparation for an experiment to demonstrate the present sensor concept, palladium chloride was deposited from an aqueous solution onto sets of gold electrodes and sintered in air to form a film. Then while using the gold electrodes to measure the electrical resistance of the films, the films were exposed, at a temperature of 25 C, to humidified air containing mercury at various concentrations from 0 to 35 ppb (see figure). The results of this and other experiments have been interpreted as signifying that sensors of this type can detect mercury in room-temperature air at concentrations of at least 2.5 ppb and can readily be regenerated at temperatures <40 C.

  18. The Palladium-Catalyzed Trifluoromethylation of Vinyl Sulfonates

    PubMed Central

    Cho, Eun Jin; Buchwald, Stephen L.

    2011-01-01

    A method for the palladium-catalyzed trifluoromethylation of cyclohexenyl sulfonates has been developed. Various cyclohexenyl triflates and nonaflates underwent trifluoromethylation under mild reaction conditions using a catalyst system composed of Pd(dba)2 or [(allyl)PdCl]2 and the monodentate biaryl phosphine ligand tBuXPhos. The trifluoromethyl anion (CF3?) or its equivalent for the process was generated in situ from TMSCF3 in combination with KF or TESCF3 in combintion with RbF. PMID:22111687

  19. Determination of palladium and platinum by atomic absorption

    USGS Publications Warehouse

    Schnepfe, M.M.; Grimaldi, F.S.

    1969-01-01

    Palladium and platinum are determined by atomic absorption after fire-assay concentration into a gold bead. The limit of determination is ~0??06 ppm in a 20-g sample. Serious depressive interelement interferences are removed by buffering the solutions with a mixture of cadmium and copper sulphates with cadmium and copper concentrations each at 0??5%. Substantial amounts of Ag, Al, Au, Bi, Ca, Co, Cr, Fe, Hg, K, La, Mg, Mn, Mo, Na, Ni, Pb, Te, Ti, V, Y, Zn, and the platinum metals do not interfere in the atomic-absorption determination. ?? 1969.

  20. Bulk synthesis of nanoporous palladium and platinum powders

    DOEpatents

    Robinson, David B; Fares, Stephen J; Tran, Kim L; Langham, Mary E

    2014-04-15

    Disclosed is a method for providing nanoporous palladium and platinum powders. These materials were synthesized on milligram to gram scales by chemical reduction of tetrahalo-complexes with ascorbate in a concentrated aqueous surfactant at temperatures between -20.degree. C. and 30.degree. C. The prepared particles have diameters of approximately 50 nm, wherein each particle is perforated by pores having diameters of approximately 3 nm, as determined by electron tomography. These materials are of potential value for hydrogen and electrical charge storage applications.

  1. PLATINUM-GROUP METALS (Platinum, palladium, rhodium, ruthenium, iridium, osmium)

    E-print Network

    126 PLATINUM-GROUP METALS (Platinum, palladium, rhodium, ruthenium, iridium, osmium) (Data,000 Rhodium 12,000 13,200 13,600 15,900 18,000 Ruthenium 15,900 18,800 23,200 36,000 37,000 Iridium 2,200 3.00 232.93 203.54 322.93 360.00 Rhodium 530.28 983.24 2,059.73 4,561.06 6,060.00 Ruthenium 35.43 64.22 74

  2. PLATINUM-GROUP METALS (Platinum, palladium, rhodium, ruthenium, iridium, osmium)

    E-print Network

    124 PLATINUM-GROUP METALS (Platinum, palladium, rhodium, ruthenium, iridium, osmium) (Data,000 Rhodium 10,300 18,200 12,400 9,890 8,630 Ruthenium 11,400 20,900 8,170 10,800 9,940 Iridium 2,270 2,700 3,598.67 838.88 750.25 Ruthenium 40.70 129.76 130.67 66.33 55.60 Employment, mine, number 954 1,290 1,320 1

  3. PLATINUM-GROUP METALS (Platinum, palladium, rhodium, ruthenium, iridium, osmium)

    E-print Network

    120 PLATINUM-GROUP METALS (Platinum, palladium, rhodium, ruthenium, iridium, osmium) (Data,900 16,600 12,600 10,200 Ruthenium 23,200 36,000 48,700 49,800 21,600 Iridium 3,010 2,800 3,410 2,550 1.34 355.12 254.00 Rhodium 2,059.73 4,561.06 6,203.09 6,533.57 1,468.00 Ruthenium 74.41 193.09 573.74 324

  4. PLATINUM-GROUP METALS (Platinum, palladium, rhodium, ruthenium, iridium, osmium)

    E-print Network

    122 PLATINUM-GROUP METALS (Platinum, palladium, rhodium, ruthenium, iridium, osmium) (Data,000 Rhodium 8,630 12,000 13,200 13,600 17,000 Ruthenium 9,890 15,900 18,800 23,200 30,000 Iridium 2,100 2.00 232.93 203.54 330.00 Rhodium 838.88 530.28 983.24 2,059.73 4,300.00 Ruthenium 66.33 35.43 64.22 74

  5. PLATINUM-GROUP METALS (Platinum, palladium, rhodium, ruthenium, iridium, osmium)

    E-print Network

    126 PLATINUM-GROUP METALS (Platinum, palladium, rhodium, ruthenium, iridium, osmium) (Data,000 Rhodium 12,400 8,630 12,000 13,200 14,000 Ruthenium 8,170 9,890 15,900 18,800 24,000 Iridium 3,110 2,100 2.00 Rhodium 1,600.00 838.88 530.28 983.24 2,000.00 Ruthenium 130.67 66.33 35.43 64.22 70.00 Iridium 415.25 294

  6. Palladium(0)-catalyzed intramolecular decarboxylative allylation of ortho nitrobenzoic esters.

    PubMed

    Hossian, Asik; Singha, Shantanu; Jana, Ranjan

    2014-08-01

    A Pd/Ag bimetallic system has been developed for the decarboxylative allylation of ortho-nitrobenzoic esters in an intramolecular fashion. In contrast to the typical sp(2)-sp(3) cross-coupling approach which requires air and moisture sensitive preformed organometallic reagents, we provide an alternative route to the synthesis of ortho-allyl nitroarenes from the corresponding ortho-nitrobenzoic acid derivatives. The reaction proceeds through a mechanistically distinct decarboxylative metalation pathway. A cooperative reactivity of palladium and silver is crucial for the reaction outcome. PMID:25055344

  7. Palladium nanoparticles on InP for hydrogen detection

    PubMed Central

    2011-01-01

    Layers of palladium (Pd) nanoparticles on indium phosphide (InP) were prepared by electrophoretic deposition from the colloid solution of Pd nanoparticles. Layers prepared by an opposite polarity of deposition showed different physical and morphological properties. Particles in solution are separated and, after deposition onto the InP surface, they form small aggregates. The size of the aggregates is dependent on the time of deposition. If the aggregates are small, the layer has no lateral conductance. Forward and reverse I-V characteristics showed a high rectification ratio with a high Schottky barrier height. The response of the structure on the presence of hydrogen was monitored. PMID:21711487

  8. Statistical theory of forming structural vacancies in palladium hydride

    NASA Astrophysics Data System (ADS)

    Zaginaichenko, S. Yu.; Matysina, Z. A.; Shchur, D. V.

    2011-07-01

    Based on molecular-kinetic representations, the theory of forming structural vacancies and vacant-ordered superstructure of Cu3Au type in palladium hydride is developed. Free energies of PdH and Pd3VH4 phases are calculated. The constitution diagram is constructed that determines ranges of temperature and concentration in which phases with A1 and L12 structures are formed and regions of two A1 + L12 phases are realized. Results of theoretical calculations are in agreement with the available experimental data.

  9. Bulk synthesis of nanoporous palladium and platinum powders

    SciTech Connect

    Robinson, David B. (Fremont, CA); Fares, Stephen J. (Pleasanton, CA); Tran, Kim L. (Livermore, CA); Langham, Mary E. (Pleasanton, CA)

    2012-04-17

    Disclosed is a method for providing nanoporous palladium and platinum powders. These materials were synthesized on milligram to gram scales by chemical reduction of tetrahalo-complexes with ascorbate in a concentrated aqueous surfactant at temperatures between -20.degree. C. and 30.degree. C. The prepared particles have diameters of approximately 50 nm, wherein each particle is perforated by pores having diameters of approximately 3 nm, as determined by electron tomography. These materials are of potential value for hydrogen and electrical charge storage applications.

  10. Optical absorption spectra of palladium doped gold cluster cations

    NASA Astrophysics Data System (ADS)

    Kaydashev, Vladimir E.; Janssens, Ewald; Lievens, Peter

    2015-01-01

    Photoabsorption spectra of gas phase Aun+ and Aun-1Pd+ (13 ? n ? 20) clusters were measured using mass spectrometric recording of wavelength dependent Xe messenger atom photodetachment in the 1.9-3.4 eV photon energy range. Pure cationic gold clusters consisting of 15, 17, and 20 atoms have a higher integrated optical absorption cross section than the neighboring sizes. It is shown that the total optical absorption cross section increases with size and that palladium doping strongly reduces this cross section for all investigated sizes and in particular for n = 14-17 and 20. The largest reduction of optical absorption upon Pd doping is observed for n = 15.

  11. The study of palladium ions incorporation into the mesoporous ordered silicates

    NASA Astrophysics Data System (ADS)

    Zienkiewicz-Strza?ka, M.; Pikus, S.

    2012-11-01

    In this work mesoporous ordered silica materials containing palladium species were prepared using of tetraammine palladium chloride ([Pd(NH3)4]Cl2) complex as a palladium source during synthesis and by wetness impregnation of pure support by solution containing dissolved metal salt. The ammonia ligands from tetraammine palladium chloride were removed during calcination or during thermal treatment at 300 °C in oxygen atmosphere. For reduction of palladium ions to metallic state as prepared materials were treated by hydrogen at high temperature. In this work the locations of palladium atoms in silica lattice were considered by study of binding energy changes of cardinal atoms of mesoporous ordered silica. Ordered mesoporous silicates (MCM-41 and SBA-15) are very promising materials for a wide range of industrial applications due to their unique properties as well-defined ordered structure and excellent textural properties. They exhibit high surface area with high pore volume. Such supports ensure a high dispersion of the metal nanoparticles or other active phases providing the high activity of solid catalysts. The obtained materials were characterized primarily by X-ray diffraction (XRD) technique, X-ray photoelectron spectroscopy (XPS), nitrogen adsorption-desorption isotherms, and infrared spectroscopy. The proportional content of palladium was controlled by X-ray fluorescence technique.

  12. Supported Palladium Nanoparticles Synthesized by Living Plants as a Catalyst for Suzuki-Miyaura Reactions

    PubMed Central

    Parker, Helen L.; Rylott, Elizabeth L.; Hunt, Andrew J.; Dodson, Jennifer R.; Taylor, Andrew F.; Bruce, Neil C.; Clark, James H.

    2014-01-01

    The metal accumulating ability of plants has previously been used to capture metal contaminants from the environment; however, the full potential of this process is yet to be realized. Herein, the first use of living plants to recover palladium and produce catalytically active palladium nanoparticles is reported. This process eliminates the necessity for nanoparticle extraction from the plant and reduces the number of production steps compared to traditional catalyst palladium on carbon. These heterogeneous plant catalysts have demonstrated high catalytic activity in Suzuki coupling reactions between phenylboronic acid and a range of aryl halides containing iodo-, bromo- and chloro- moieties. PMID:24489869

  13. Encapsulation of palladium crystallites in carbon and the formation of wormlike nanostructures

    SciTech Connect

    Wang, Y. (DuPont Company, Wilmington, DE (United States))

    1994-01-12

    This note reports the successful inclusion of cubic palladium crystals inside giant carbon clusters and the formation of novel wormlike carbon nanostructures (nanoworms). The head of the [open quotes]worm[close quotes] typically 20-50 nm in diameter, consists of palladium encapsulated in carbon, and the body of the [open quotes]worm[close quotes] several hundred nanometers in length, consists of many sections of carbon tubes with cone-shaped internal voids. The technique used to generate carbon-encapsulated palladium is the electric arc method. 17 refs., 3 figs.

  14. Colourimetric and fluorescent probes for the optical detection of palladium ions.

    PubMed

    Li, Honglin; Fan, Jiangli; Peng, Xiaojun

    2013-10-01

    In recent years, the development of optical probes to analyse trace palladium ions (Pd(2+)) has attracted great attention because of the residual palladium released by catalytic converters or from various Pd-catalysed reactions. These residual palladium ions may cause potential health hazards. This review provides a brief introduction to the new methods used to determine trace amounts of Pd(2+), which then mainly focuses on the different reporting systems and unique mechanisms of the colourimetric and fluorescent probes used to detect Pd(2+), including Pd(2+) complex formation or Pd-catalysed reactions. PMID:23845987

  15. Behavior of palladium-copper catalysts for CO and NO elimination

    SciTech Connect

    Fernandez-Garcia, M.; Martinez-Arias, A.; Belver, C.; Anderson, J.A.; Conesa, J.C.; Soria, J.

    2000-03-10

    The behavior of a series of palladium and palladium-copper catalysts supported on ceria/alumina for the CO + NO + O{sub 2} reaction has been analyzed by a combination of electron transmission microscopy, infrared, and electron paramagnetic spectroscopies and catalytic test studies. In both systems, the catalytic behavior is dominated by the properties of the metal-ceria interface. The addition of copper to a palladium system leads to beneficial effects related to alloy formation in which both CO and NO elimination are enhanced. The chemical consequences and catalytic implications of Pd-Cu alloying are discussed.

  16. Palladium(II)-catalyzed Heck reaction of aryl halides and arylboronic acids with olefins under mild conditions

    PubMed Central

    Shaikh, Tanveer Mahamadali

    2013-01-01

    Summary A series of general and selective Pd(II)-catalyzed Heck reactions were investigated under mild reaction conditions. The first protocol has been developed employing an imidazole-based secondary phosphine oxide (SPO) ligated palladium complex (6) as a precatalyst. The catalytic coupling of aryl halides and olefins led to the formation of the corresponding coupled products in excellent yields. A variety of substrates, both electron-rich and electron-poor olefins, were converted smoothly to the targeted products in high yields. Compared with the existing approaches employing SPO–Pd complexes in a Heck reaction, the current strategy features mild reaction conditions and broad substrate scope. Furthermore, we described the coupling of arylboronic acids with olefins, which were catalyzed by Pd(OAc)2 and employed N-bromosuccinimide as an additive under ambient conditions. The resulted biaryls have been obtained in moderate to good yields. PMID:23946858

  17. Anomalous Nernst and Hall effects in magnetized platinum and palladium

    NASA Astrophysics Data System (ADS)

    Guo, G. Y.; Niu, Q.; Nagaosa, N.

    2014-06-01

    We study the anomalous Nernst effect (ANE) and anomalous Hall effect (AHE) in proximity-induced ferromagnetic palladium and platinum which is widely used in spintronics, within the Berry phase formalism based on the relativistic band-structure calculations. We find that both the anomalous Hall (?xyA) and Nernst (?xyA) conductivities can be related to the spin Hall conductivity (?xyS) and band exchange splitting (?ex) by relations ?xyA=?exe??xyS(EF)' and ?xyA=-?23kB2T?ex??xys(? )'', respectively. In particular, these relations would predict that the ?xyA in the magnetized Pt (Pd) would be positive (negative) since the ?xyS(EF)' is positive (negative). Furthermore, both ?xyA and ?xyA are approximately proportional to the induced spin magnetic moment (ms) because the ?ex is a linear function of ms. Using the reported ms in the magnetized Pt and Pd, we predict that the intrinsic anomalous Nernst conductivity (ANC) in the magnetic platinum and palladium would be gigantic, being up to ten times larger than, e.g., iron, while the intrinsic anomalous Hall conductivity (AHC) would also be significant.

  18. Carbon-palladium films as gas sensors (hydrogen, ammonia, methane)

    NASA Astrophysics Data System (ADS)

    Rymarczyk, Joanna; Kami?ska, Anna; Krawczyk, S?awomir

    2014-11-01

    In this paper we present the results of the resistances changes of carbon-palladium films under the influences of gas like hydrogen, ammonia and methane. Our research has shown that carbon-palladium films (C-Pd films) according to the form and the structure in which they appear, they can respond to a variety of gases. The C-Pd film obtained by Physical Vapor Deposition (PVD) method is sensitive to hydrogen and do not respond to the ammonia. Thermal modification of the C-Pd film in Chemical Vapor Deposition (CVD) process affects the morphology of the film, increases its resistance and it causes that this film begins to react to the ammonia. This change causes that this film stops responding on hydrogen. Film sensitive to methane was obtained by changing the technology conditions of the PVD process. The reaction of C-Pd film on the hydrogen and the ammonia is increase resistance, while film sensitive to methane reacts by decrease of initial resistance value. In both cases, the changes are reversible after cleaning by air atmosphere. Different varieties of C-Pd films can be used to build selective sensors for hydrogen, ammonia and methane.

  19. Polymer-coated palladium nanoparticle catalysts for Suzuki coupling reactions.

    PubMed

    Bortolotto, Tanize; Facchinetto, Sara Elisa; Trindade, Suelen Gauna; Ossig, Andreia; Petzhold, Cesar Liberato; Vargas, Josimar; Rodrigues, Oscar Endrigo Dorneles; Giacomelli, Cristiano; Schmidt, Vanessa

    2015-02-01

    A set of seven different palladium nanoparticle (PdNP) systems stabilized by small amounts (1.0mg/mL) of structurally related macromolecular capping agents were comparatively tested as catalyst in p-nitrophenol (Nip) reduction and Suzuki cross-coupling reactions. The observed rate constants (kobs) for Nip reduction were in the range of 0.052-3.120×10(-2)s(-1), and the variation reflected the effects of polymer chain conformation, ionic strength and palladium-polymer complex coordination. Macromolecules featuring pendant pyridyl moieties or inverse temperature-dependent solubility were found to be unsuitable capping agents for PdNPs catalysts, despite being active. The catalytic activity in Suzuki cross-coupling reactions followed the same behavior; the most active particles in the Nip reaction also mediated the cross-coupling reaction providing the expected products in quantitative yields under relatively mild conditions after only 4h at 50°C. Experiments involving the successive addition of reactants and catalyst recovery/re-use indicated that the recycling potential was comparable to those of the standards used in this field. PMID:25463188

  20. Synthetic strategies for controlling inter- and intramolecular interactions: Applications in single-molecule fluorescence imaging, bioluminescence imaging, and palladium catalysis

    NASA Astrophysics Data System (ADS)

    Conley, Nicholas R.

    The field of synthetic organic chemistry has reached such maturity that, with sufficient effort and resources, the synthesis of virtually any small molecule which exhibits reasonable stability at room temperature can be realized. While representing a monumental achievement for the field, the ability to exert precise control over molecular structure is just a means to an end, and it is frequently the responsibility of the synthetic chemist to determine which molecules should actually be synthesized. For better or worse, there exists no competitive free market in academia for new molecules, and as a result, the decision of which compounds should be synthesized is seldom driven by the forces of supply and demand; rather, it is guided by the synthetic chemist's interest in an anticipated structure-function relationship or in the properties of a previously unstudied class of molecules. As a consequence, there exists a pervasive need for chemists with synthetic expertise in fields (e.g., molecular imaging) and subdisciplines of chemistry (e.g., physical chemistry) in which the identification of promising synthetic targets dramatically outpaces the synthetic output in that field or subdiscipline, and ample opportunities are available for synthetic chemists who choose to pursue such cross-disciplinary research. This thesis describes synthetic efforts that leverage these opportunities to realize applications in biological imaging and in palladium catalysis. In Part I, the synthesis and characterization of three novel luminophores and their imaging applications are discussed. The first is a molecular beacon that utilizes a fluorophorefluorophore pair which exhibits H-dimer quenching in the closed conformation. This probe offers several advantages over conventional fluorophore-quencher molecular beacons in the detection of oligonucleotides, both in bulk and at the single-molecule level. Secondly, a fluorescent, Cy3-Cy5 covalent heterodimer is reported, which on account of the proximity of the Cy3 and Cy5 fluorophores, behaves as an optical photoswitch in the presence of a thiol reagent. This unique property was employed to achieve sub-diffraction-limited imaging of the stalks of Caulobacter crescentus cells with 30-nm resolution using STORM (stochastic optical reconstruction microscopy). Lastly, the synthesis of the first selenium analogue of firefly luciferin is described, and this analogue is shown to be a competent substrate for firefly luciferase (fLuc). Remarkably, it exhibits red-shifted bioluminescence emission relative to the native sulfur analogue. The in vivo performance of the selenium and sulfur analogues in imaging are compared by tail-vein injection into nude mice bearing subcutaneous tumor xenografts of a human breast cancer cell line that was stably transduced to express fLuc. Part II of this thesis begins by addressing design considerations in the development of palladium catalysts that effect oxidative transformations under mild conditions (i.e., 1 atm air, room temperature) using molecular oxygen as the terminal oxidant. A newly synthesized cationic palladium complex, [(2,9-dimethylphenanthroline)Pd(OAc)]2[OTf]2, is shown to catalyze aerobic alcohol oxidation under such conditions with an unprecedented initial turnover frequency, but the presence of partially reduced oxygen species results in competitive ligand oxidation with concomitant decrease in catalyst activity. To remedy this, oxidatively resistant ligands, which are essential for the development of next-generation, high-turnover-frequency palladium catalysts that utilize oxygen as a terminal oxidant, have been prepared and effectively employed. In addition, the first general palladium-catalyzed route to the carbonylation of diols is reported. In this system, carbon monoxide (1 atm) serves the carbonyl source, (2,9-dimethylphenanthroline)Pd(OAc) 2 acts as the catalyst, and N-chlorosuccinimide and iodosobenzene are the oxidants for 1,2- and 1,3-diols, respectively. This thesis illustrates the power of synthetic organic chemistry to exert precise control ove

  1. Ultrasensitive biosensing platform based on the luminescence quenching ability of plasmonic palladium nanoparticles.

    PubMed

    Li, Hui; Sun, De-En; Liu, Zhihong

    2015-03-23

    An ultrasensitive biosensing platform for DNA and protein detection is constructed based on the luminescence quenching ability of plasmonic palladium nanoparticles (PdNPs). By growing the particles into large sizes (ca. 30?nm), the plasmonic light absorption of PdNPs is broadened and extended to the visible range with extinction coefficients as high as 10(9) ?L?mol(-1) ?cm(-1) , enabling complete quenching of fluorescent dyes that emit at diverse ranges and that are tagged to bioprobes. Meanwhile the nonspecific quenching of the dyes (not bound to probes) is negligible, leading to extremely low background signal. Utilizing the affinity of PdNPs towards bioprobes, such as single-stranded (ss) DNA and polypeptide molecules, which is mainly assigned to the coordination interaction, nucleic acid assays with a quantification limit of 3?pM target DNA and protein assay are achieved with a simple mix-and-detect strategy based on the luminescence quenching-and-recovery protocol. This is the first demonstration of biosensing employing plasmonic absorption of nanopalladium, which offers pronounced sensing performances and can be reasonably expected for wide applications. PMID:25678134

  2. Wet processing of palladium for use in the tritium facility at Westinghouse, Savannah River, SC. Preparation of palladium using the Mound Muddy Water process

    SciTech Connect

    Baldwin, D.P.; Zamzow, D.S.

    1998-11-10

    Palladium used at Savannah River for tritium storage is currently obtained from a commercial source. In order to better understand the processes involved in preparing this material, Savannah River is supporting investigations into the chemical reactions used to synthesize this material and into the conditions necessary to produce palladium powder that meets their specifications. This better understanding may help to guarantee a continued reliable source for this material in the future. As part of this evaluation, a work-for-others contract between Westinghouse Savannah River Company and the Ames Laboratory Metallurgy and Ceramics Program was initiated. During FY98, the process for producing palladium powder developed in 1986 by Dan Grove of Mound Applied Technologies (USDOE) was studied to understand the processing conditions that lead to changes in morphology in the final product. This report details the results of this study of the Mound Muddy Water process, along with the results of a round-robin analysis of well-characterized palladium samples that was performed by Savannah River and Ames Laboratory. The Mound Muddy Water process is comprised of three basic wet chemical processes, palladium dissolution, neutralization, and precipitation, with a number of filtration steps to remove unwanted impurity precipitates.

  3. STS-118 Astronauts Rick Mastracchio and Clay Anderson Perform EVA

    NASA Technical Reports Server (NTRS)

    2007-01-01

    As the construction continued on the International Space Station (ISS), STS-118 astronaut and mission specialist Rick Mastracchio was anchored on the foot restraint of the Canadarm2 as he participated in the third session of Extra Vehicular Activity (EVA) for the mission. Assisting Mastracchio was Expedition 15 flight engineer Clay Anderson (out of frame). During the 5 hour, 28 minute space walk, the two relocated the S-band Antenna Sub-Assembly from the Port 6 (P6) truss to the Port 1 (P1) truss, installed a new transponder on P1 and retrieved the P6 transponder.

  4. Cleanup Verification Package for the 118-F-1 Burial Ground

    SciTech Connect

    E. J. Farris and H. M. Sulloway

    2008-01-10

    This cleanup verification package documents completion of remedial action for the 118-F-1 Burial Ground on the Hanford Site. This burial ground is a combination of two locations formerly called Minor Construction Burial Ground No. 2 and Solid Waste Burial Ground No. 2. This waste site received radioactive equipment and other miscellaneous waste from 105-F Reactor operations, including dummy elements and irradiated process tubing; gun barrel tips, steel sleeves, and metal chips removed from the reactor; filter boxes containing reactor graphite chips; and miscellaneous construction solid waste.

  5. Recent advances in palladium-catalyzed carbon-carbon and carbon-boron bond forming processes

    E-print Network

    Billingsley, Kelvin L

    2008-01-01

    Chapter 1. Highly active and efficient catalyst systems derived from palladium precatalysts and monophosphine ligands for the Suzuki-Miyaura cross-coupling reaction of heteroaryl boronic acids and esters has been developed. ...

  6. Microwave enhanced palladium catalysed coupling reactions: a diversity-oriented synthesis approach to functionalised flavones.

    PubMed

    Fitzmaurice, Richard J; Etheridge, Zac C; Jumel, Emelie; Woolfson, Derek N; Caddick, Stephen

    2006-12-14

    Microwave enhanced diversity-oriented synthesis (MEDOS) using palladium catalysed protocols is introduced as a powerful new strategy for the synthesis of systematically modified small molecules and is highlighted by application to functionalised flavones. PMID:17345738

  7. Gold-promoted structurally ordered intermetallic palladium cobalt nanoparticles for the oxygen reduction reaction.

    PubMed

    Kuttiyiel, Kurian A; Sasaki, Kotaro; Su, Dong; Wu, Lijun; Zhu, Yimei; Adzic, Radoslav R

    2014-01-01

    Considerable efforts to make palladium and palladium alloys active catalysts and a possible replacement for platinum have had a marginal success. Here we report on a structurally ordered Au10Pd??Co?? catalyst that exhibits comparable activity to conventional platinum catalysts in both acid and alkaline media. Electron microscopic techniques demonstrate that, at elevated temperatures, palladium cobalt nanoparticles undergo an atomic structural transition from core-shell to a rare intermetallic ordered structure with twin boundaries forming stable {111}, {110} and {100} facets via addition of gold atoms. The superior stability of this catalyst compared with platinum after 10,000 potential cycles in alkaline media is attributed to the atomic structural order of PdCo nanoparticles along with protective effect of clusters of gold atoms on the surface. This strategy of making ordered palladium intermetallic alloy nanoparticles can be used in diverse heterogeneous catalysis where particle size and structural stability matter. PMID:25373826

  8. Edinburgh Research Explorer Extracellular palladium-catalysed dealkylation of 5-fluoro-1-

    E-print Network

    Millar, Andrew J.

    | Accepted 17 Jan 2014 | Published 13 Feb 2014 Extracellular palladium-catalysed dealkylation of 5-fluoro-1-uracil as a bioorthogonally activated prodrug approach Citation for published version: Weiss, JT, Dawson, JC, Macleod, KG

  9. Platinum-ruthenium-palladium alloys for use as a fuel cell catalyst

    DOEpatents

    Gorer, Alexander (Sunnyvale, CA)

    2002-01-01

    A noble metal alloy composition for a fuel cell catalyst, a ternary alloy composition containing platinum, ruthenium and palladium. The alloy shows increased activity as compared to well-known catalysts.

  10. Study of the kinetics of catalytic decomposition of hydrazine vapors on palladium

    NASA Technical Reports Server (NTRS)

    Khomenko, A. A.; Apelbaum, L. O.

    1987-01-01

    The decomposition rates of N2H4 on a palladium surface are studied. Experiments were conducted in a circulating unit at atmosphere pressure. The experimental method is described. The laws found for the reaction kinetics are explained by equations.

  11. Synthesis of indoles via palladium-catalyzed annulation of aryl chlorides and internal alkynes

    E-print Network

    Dussault, Daemian David, 1973-

    2005-01-01

    A palladium-catalyzed preparation of 2,3-disubstituted indoles from commercially available and relatively inexpensive reagents, o-chloroacetanilide and internal alkynes, is reported. The system is efficient in delivering ...

  12. Stabilization of the palladium electrocatalyst with alloyed gold for ethanol oxidation

    E-print Network

    Zhao, Tianshou

    Stabilization of the palladium electrocatalyst with alloyed gold for ethanol oxidation J.B. Xu, T with the incorporation of gold due to its unique electron-withdrawing effect to neighboring primary metal atoms

  13. Palladium-catalyzed C-C, C-N and C-O bond formation

    E-print Network

    Huang, Xiaohua, 1973-

    2003-01-01

    New methods for Pd-catalyzed cross-coupling reactions of aryl halides or arenesulfonates are described. Key to the success of these transformations is the proper choice of ligand and reaction conditions. Palladium catalysts ...

  14. Low-temperature carbon monoxide oxidation catalysed by regenerable atomically dispersed palladium on alumina.

    PubMed

    Peterson, Eric J; DeLaRiva, Andrew T; Lin, Sen; Johnson, Ryan S; Guo, Hua; Miller, Jeffrey T; Hun Kwak, Ja; Peden, Charles H F; Kiefer, Boris; Allard, Lawrence F; Ribeiro, Fabio H; Datye, Abhaya K

    2014-01-01

    Catalysis by single isolated atoms of precious metals has attracted much recent interest, as it promises the ultimate in atom efficiency. Most previous reports are on reducible oxide supports. Here we show that isolated palladium atoms can be catalytically active on industrially relevant ?-alumina supports. The addition of lanthanum oxide to the alumina, long known for its ability to improve alumina stability, is found to also help in the stabilization of isolated palladium atoms. Aberration-corrected scanning transmission electron microscopy and operando X-ray absorption spectroscopy confirm the presence of intermingled palladium and lanthanum on the ?-alumina surface. Carbon monoxide oxidation reactivity measurements show onset of catalytic activity at 40 °C. The catalyst activity can be regenerated by oxidation at 700 °C in air. The high-temperature stability and regenerability of these ionic palladium species make this catalyst system of potential interest for low-temperature exhaust treatment catalysts. PMID:25222116

  15. 16 CFR 23.7 - Misuse of the words “platinum,” “iridium,” “palladium,” “ruthenium,” “rhodium,” and “osmium.”

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ...for each of the PGM may be used for quality marks on articles: “Plat.” or “Pt.” for Platinum; “Irid.” or “Ir.” for Iridium; “Pall.” or “Pd.” for Palladium; “Ruth.” or “Ru.” for Ruthenium; “Rhod.” or “Rh.” for...

  16. 16 CFR 23.7 - Misuse of the words “platinum,” “iridium,” “palladium,” “ruthenium,” “rhodium,” and “osmium.”

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ...for each of the PGM may be used for quality marks on articles: “Plat.” or “Pt.” for Platinum; “Irid.” or “Ir.” for Iridium; “Pall.” or “Pd.” for Palladium; “Ruth.” or “Ru.” for Ruthenium; “Rhod.” or “Rh.” for...

  17. 16 CFR 23.7 - Misuse of the words “platinum,” “iridium,” “palladium,” “ruthenium,” “rhodium,” and “osmium.”

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ...for each of the PGM may be used for quality marks on articles: “Plat.” or “Pt.” for Platinum; “Irid.” or “Ir.” for Iridium; “Pall.” or “Pd.” for Palladium; “Ruth.” or “Ru.” for Ruthenium; “Rhod.” or “Rh.” for...

  18. 16 CFR 23.7 - Misuse of the words “platinum,” “iridium,” “palladium,” “ruthenium,” “rhodium,” and “osmium.”

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ...for each of the PGM may be used for quality marks on articles: “Plat.” or “Pt.” for Platinum; “Irid.” or “Ir.” for Iridium; “Pall.” or “Pd.” for Palladium; “Ruth.” or “Ru.” for Ruthenium; “Rhod.” or “Rh.” for...

  19. Synthesis of Aryl Sulfonamides via Palladium-Catalyzed Chlorosulfonylation of Arylboronic Acids

    E-print Network

    Niljianskul, Nootaree

    A palladium-catalyzed method for the preparation of sulfonamides is described. The process exhibits significant functional group tolerance and allows for the preparation of a number of arylsulfonyl chlorides and sulfonamides ...

  20. Palladium-Catalyzed Conversion of Aryl and Vinyl Triflates to Bromides and Chlorides

    E-print Network

    Shen, Xiaoqiang

    2010-01-01

    The palladium-catalyzed conversion of aryl and vinyl triflates to aryl and vinyl halides (bromides and chlorides) has been developed using dialkylbiaryl phosphine ligands. A variety of aryl, heteroaryl, and vinyl halides ...

  1. Transfer hydrogenation using recyclable polyurea-encapsulated palladium: efficient and chemoselective reduction of aryl ketones.

    PubMed

    Yu, Jin-Quan; Wu, Hai-Chen; Ramarao, Chandrashekar; Spencer, Jonathan B; Ley, Steven V

    2003-03-21

    A robust and recyclable palladium catalyst [Pd0EnCat] has been prepared by ligand exchange of polyurea-encapsulated palladium(II) acetate with formic acid, resulting in deposition of Pd(0) in the support material; Pd0EnCat is shown to be a highly efficient transfer hydrogenation catalyst for chemoselective reduction of a wide range of aryl ketones to benzyl alcohols. PMID:12703769

  2. Measurements of excess heat from a Pons-Fleischmann-type electrolytic cell using palladium sheet

    Microsoft Academic Search

    EDMUND STORMS

    1993-01-01

    Two pieces of palladium sheet similar to that used by Takahashi were loaded with deuterium in a Pons-Fleischmann-type electrolytic cell, and heat production was measured. One sheet produced a steady increase in excess power that reached 7.5 W (20% of input power) before the study was interrupted. A second similar sheet from a different batch of palladium did not produce

  3. Synthesis and resolution of planar-chiral ruthenium-palladium complexes with ECE' pincer ligands.

    PubMed

    Bonnet, Sylvestre; Li, Jie; Siegler, Maxime A; von Chrzanowski, Lars S; Spek, Anthony L; van Koten, Gerard; Klein Gebbink, Robertus J M

    2009-01-01

    Feel the pinch! Planar-chiral, cationic, ruthenium-palladium complexes based on eta(6),eta(1)-coordinated ECE' pincer ligands are synthesized as racemic mixtures by reacting ECE'-palladium complexes and [Ru(C(5)R(5))(MeCN)(3)](+) arenophiles (R=H or Me). Chiral resolution of the cationic complexes was achieved by using the chiral counterion [Delta-TRISPHAT](-), and solving the X-ray crystal structure of one diastereoisomer (shown here). PMID:19229920

  4. Synthesis and resolution of Planar-Chiral Ruthenium-Palladium complexes with ECE pincer ligands

    Microsoft Academic Search

    Sylvestre Bonnet; Jie Li

    2009-01-01

    Feel the pinch! Planar-chiral, cationic, ruthenium-palladium complexes based on 6,1-coordinated ECE pincer ligands are synthesized as racemic mixtures by reacting ECE-palladium complexes and [Ru(C5R5)(MeCN)3]+ arenophiles (R=H or Me). Chiral resolution of the cationic complexes was achieved by using the chiral counterion [-TRISPHAT]-, and solving the X-ray crystal structure of one diastereoisomer

  5. Leaching of gold and palladium with aqueous ozone in dilute chloride media

    Microsoft Academic Search

    J. Viñals; E. Juan; M. Ruiz; E. Ferrando; M. Cruells; A. Roca; J. Casado

    2006-01-01

    The recycling of gold and palladium from metallic scraps can be carried out by ozone-leaching at ambient temperature and low (?0.1 M) H+ and Cl? concentrations. Rh and Pt remain un-reacted, whereas metals such as Cu, Ni, Ag, can be previously eliminated through O2\\/H+ and O2\\/O3\\/H+ leaching pretreatments. Gold and palladium are dissolved in O3\\/Cl?\\/H+ with formation of AuCl4? and

  6. Asymmetric palladium-catalyzed allylic alkylation using dialkylzinc reagents: a remarkable ligand effect.

    PubMed

    Misale, Antonio; Niyomchon, Supaporn; Luparia, Marco; Maulide, Nuno

    2014-07-01

    A serendipitously discovered palladium-catalyzed asymmetric allylic alkylation reaction with diorganozinc reagents, which displays broad functional group compatibility, is reported. This novel transformation hinges on a remarkable ligand effect which overrides the standard "umpolung" reactivity of allyl-palladium intermediates in the presence of dialkylzincs. Owing to its mild conditions, enantioselective allylic alkylations of racemic allylic electrophiles are possible in the presence of sensitive functional groups. PMID:24888236

  7. The generalized lewis acid-base titration of palladium and niobium

    Microsoft Academic Search

    M. Cima; L. Brewer

    1988-01-01

    The high thermodynamic stability of alloys composed of platinum group metals and group IVB and VB metals has been explained\\u000a by an electronic interaction analogous to the Lewis acid-base concept for nontransition elements. The analogy is further demonstrated\\u000a by the titration of palladium by addition of niobium. The activity of niobium in solid palladium was measured as a function\\u000a of

  8. Multiphoton lithography of nanocrystalline platinum and palladium for site-specific catalysis in 3D microenvironments.

    PubMed

    Zarzar, Lauren D; Swartzentruber, B S; Harper, Jason C; Dunphy, Darren R; Brinker, C Jeffrey; Aizenberg, Joanna; Kaehr, Bryan

    2012-03-01

    Integration of catalytic nanostructured platinum and palladium within 3D microscale structures or fluidic environments is important for systems ranging from micropumps to microfluidic chemical reactors and energy converters. We report a straightforward procedure to fabricate microscale patterns of nanocrystalline platinum and palladium using multiphoton lithography. These materials display excellent catalytic, electrical, and electrochemical properties, and we demonstrate high-resolution integration of catalysts within 3D defined microenvironments to generate directed autonomous particle and fluid transport. PMID:22335831

  9. Benzylic C–H activation and C–O bond formation via aryl to benzylic 1,4-palladium migrations

    Microsoft Academic Search

    Tanay Kesharwani; Richard C. Larock

    2008-01-01

    A procedure for benzylic C–H activation has been developed using a palladium 1,4-aryl to benzylic migration as a key step. Carboxylates and phenoxides readily trap the resulting benzylic palladium intermediates obtained from palladium ‘through space’ migration. Aryl bromides and iodides have been successfully employed in this reaction, furnishing moderate to good yields. The mechanism of this reaction has been studied

  10. Determination of platinum and palladium in geological materials by neutron-activation analysis after fire-assay preconcentration

    USGS Publications Warehouse

    Rowe, J.J.; Simon, F.O.

    1971-01-01

    Fire-asay preconcentration followed by neutron-activation analysis permits the determination of as little as 0.5 ppM of platinum and 0.5 ppM of palladium on a 20-g sample. Platinum and palladium are separated with carriers and beta-counted. Results for the platinum and palladium content of seven U.S.G.S. standard rocks are presented. ?? 1971.

  11. Recycling of a spent iron based catalyst for the complete oxidation of toluene: effect of palladium.

    PubMed

    Kim, Sang Chai; Nah, Jae Woon

    2015-01-01

    Complete oxidation of volatile organic compound (toluene) was carried out to assess the property and activity of the palladium-spent iron based catalyst. The properties of the prepared catalysts were characterized by using the Brunauer-Emmett-Teller method and by conducting temperature-programmed reduction, X-ray diffraction, X-ray photoelectron spectroscopy and field emission transmission electron microscopy. The addition of palladium to the spent iron based catalyst pretreated with oxalic acid shifted the conversion curve for the total oxidation of toluene to lower temperature. An increase in the toluene conversion due to palladium was highly related to the easier lattice oxygen mobility of the catalysts. Instrumental analysis suggested the presence of a strong interaction between palladium and iron oxide species. Moreover, in the case of reducing the Pd/Fe catalyst with hydrogen, palladium accelerated the reducing iron oxides, subsequently decreasing the toluene conversion. As a result, the oxidation states of palladium and iron had an important effect on the catalytic activity. PMID:25413115

  12. Study of tin oxide: Surface properties and palladium adsorption

    NASA Astrophysics Data System (ADS)

    Katsiev, Khabiboulakh

    Surface properties of various single-crystalline SnO2 surfaces were studied and the growth of palladium was investigated in the low-coverage regime. Metal - oxide structures play an important role in microelectronics and nanotechnology. They are also widely used in catalysis. Small catalytically-active metal particles on metal oxide substrates are key features in the gas sensing mechanism: they dramatically increase the sensitivity and selectivity of solid-state gas sensors towards target gases. Tin Oxide is widely used in solid-state gas sensors for detection of combustible and toxic gases. Its sensitivity and selectivity strongly depends on catalytic dopants, such as Pd or Pt, on the surface of the material. Thus, the characterization of Pd growth on tin oxide may give new insights into the catalytic and gas sensing mechanisms, and also help to understand fundamental steps that lead to various metal-on-oxide growth modes. Upon deposition of Pd onto the reduced (101) surface of a SnO2 single crystal, 1D cluster growth was observed. Starting from very low coverages, one-dimensional Pd clusters grow on the terraces, which indicates that the Pd wets the reduced tin oxide surface. Pd deposition on the oxidized surface results in randomly distributed three-dimensional Pd clusters. The clusters are distributed at step edges and on terraces without any apparent preferential adsorption sites. The one-dimensional clusters are imaged in scanning tunneling microscopy (STM) as straight, parallel nanostructures oriented along the [-101] direction, all with the same characteristic width of 0.5 nm and a height of 1 monolayer (ML). X-ray photoelectron spectroscopy (XPS) experiments show no sign of Pd oxidation; i.e. Pd grows as a metal. There is a 0.5 eV shift in the Pd 3d 5/2 core level peak position to lower binding energy that occurs during the initial stages of the growth on the reduced surface. This is an indication of charge transfer from the Pd clusters to the substrate. Coverage-dependent Ultraviolet Photoelectron Spectroscopy (UPS) spectra show that, at submonolayer Pd coverages, a Pd 4d-derived peak appears at the same position (3eV from Fermi edge) in the band gap as the Sn surface state and shifts towards the Fermi edge as coverage increases. Angular resolved photoemission data of the valence band of the clean reduced SnO2 surface and the Pd dosed reduced surface shows a strong correlation between the Sn 5s derived surface state and the Pd 4d state. The position, as well as the shape of Pd 4d peak closely follows the position and the shape of the 5s derived Sn peak in both low-index directions. This is a sign of a strong electronic interaction, hybridization between Pd 4d and Sn 5s derived states. Scanning tunneling microscopy experiments on a clean, reduced SnO 2 (100)-(1x1) surface reveal surface defects with zero, one, and two dimensions. Point defects consist of missing SnO/SnO2 units. Line defects are probably crystallographic shear planes that extend to the surface and manifest themselves as rows of atoms, shifted half a unit cell along the [010] direction. Their ends act as preferential nucleation sites for the formation of Pd clusters upon vapor-deposition. Submonolayer coverages of Pd deposited on the reduced surface at room temperature by vapour deposition result in the formation of three-dimensional clusters nucleating on the terraces. Areas of a more reduced surface phase, i.e. elongated "holes", observed at the surface after annealing to higher temperatures, still with a (1x1) structure and a half-unit-cell deep, form at [001]-oriented step edges. Recently, the use of nanobelts and nanoribbons has been suggested as novel materials for gas sensing applications. The large surface-to-volume ratio of the semiconducting metal oxide nanobelts and the congruence of the carrier screening length with their lateral dimensions make them highly sensitive and efficient transducers of surface chemical processes into electrical signal. The surface morphology of an individual nanobelts (NB) was studied with STM. Atom

  13. Pore surface fractal analysis of palladium-alumina ceramic membrane using Frenkel-Halsey-Hill (FHH) model.

    PubMed

    Ahmad, A L; Mustafa, N N N

    2006-09-15

    The alumina ceramic membrane has been modified by the addition of palladium in order to improve the H(2) permeability and selectivity. Palladium-alumina ceramic membrane was prepared via a sol-gel method and subjected to thermal treatment in the temperature range 500-1100 degrees C. Fractal analysis from nitrogen adsorption isotherm is used to study the pore surface roughness of palladium-alumina ceramic membrane with different chemical composition (nitric acid, PVA and palladium) and calcinations process in terms of surface fractal dimension, D. Frenkel-Halsey-Hill (FHH) model was used to determine the D value of palladium-alumina membrane. Following FHH model, the D value of palladium-alumina membrane increased as the calcinations temperature increased from 500 to 700 degrees C but decreased after calcined at 900 and 1100 degrees C. With increasing palladium concentration from 0.5 g Pd/100 ml H(2)O to 2 g Pd/100 ml H(2)O, D value of membrane decreased, indicating to the smoother surface. Addition of higher amount of PVA and palladium reduced the surface fractal of the membrane due to the heterogeneous distribution of pores. However, the D value increased when nitric acid concentration was increased from 1 to 15 M. The effect of calcinations temperature, PVA ratio, palladium and acid concentration on membrane surface area, pore size and pore distribution also studied. PMID:16797579

  14. 41 CFR 102-118.535 - Are there principles governing my agency's TSP debt collection procedures?

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...debt collection procedures? 102-118...Contracts and Property Management Federal Property Management Regulations System...Continued) FEDERAL MANAGEMENT REGULATION TRANSPORTATION...Claims and Appeal Procedures General...

  15. Severity Indices of Personality Problems (SIPP-118) in adolescents: reliability and validity.

    PubMed

    Feenstra, Dine J; Hutsebaut, Joost; Verheul, Roel; Busschbach, Jan J V

    2011-09-01

    The Severity Indices of Personality Problems (SIPP-118; Verheul et al., 2008) is a self-report questionnaire focusing on core components of (mal)adaptive personality functioning. The SIPP-118 was developed and validated in an adult population. In adult populations, the 16 facets of the SIPP-118 fit into 5 higher order domains: self-control, identity integration, relational capacities, social concordance, and responsibility. In this study we present the 1st psychometric properties of the SIPP-118 in adolescents. We compared the SIPP-118 scores of a patient and a nonpatient sample of adolescents, and compared personality disordered and non-personality disordered adolescents. In addition, the relationship between scores on the SIPP-118 and other clinical instruments (Symptom Checklist-90-Revised; SCL-90-R; Derogatis, 1975; Dimensional Assessment of Personality Pathology-Basic Personality; DAPP-BQ; Livesley & Jackson, 2002) was investigated. The questionnaires were completed by 378 adolescent patients and 389 adolescents in the community. Facets appeared to be homogeneous, as alpha coefficients ranged from .62 to .89, indicating moderate to acceptable reliability. Also, more pathological SIPP-118 scores were found in the patient sample, and more specifically in the personality disordered sample, suggesting that the facet scores of the SIPP-118 can discriminate between various populations (divergent validity). Correlation with other clinical instruments was moderate to high (-.82 to .10). Taken together, the SIPP-118 seems to be a promising instrument measuring personality pathology in adolescents. PMID:21500921

  16. Bio?palladium: from metal recovery to catalytic applications

    PubMed Central

    De Corte, Simon; Hennebel, Tom; De Gusseme, Bart; Verstraete, Willy; Boon, Nico

    2012-01-01

    Summary While precious metals are available to a very limited extent, there is an increasing demand to use them as catalyst. This is also true for palladium (Pd) catalysts and their sustainable recycling and production are required. Since Pd catalysts exist nowadays mostly under the form of nanoparticles, these particles need to be produced in an environment?friendly way. Biological synthesis of Pd nanoparticles (‘bio?Pd’) is an innovative method for both metal recovery and nanocatalyst synthesis. This review will discuss the different bio?Pd precipitating microorganisms, the applications of the catalyst (both for environmental purposes and in organic chemistry) and the state of the art of the reactors based on the bio?Pd concept. In addition, some main challenges are discussed, which need to be overcome in order to create a sustainable nanocatalyst. Finally, some outlooks for bio?Pd in environmental technology are presented. PMID:21554561

  17. COMPARATIVE CORROSION BEHAVIOR OF TWO PALLADIUM CONTAINING TITANIUM ALLOYS

    SciTech Connect

    T. Lian, T. Yashiki, T. Nakayama, T. Nakanishi, R. B. Rebak

    2006-07-23

    The ASTM standard B 265 provides the requirements for the chemical composition of titanium (Ti) alloys. It is planned to use corrosion resistant and high strength titanium alloys to fabricate the drip shield at the proposed Yucca Mountain Repository. Titanium grade (Gr) 7 (R52400) and other Ti alloys are currently being characterized for this application. Ti Gr 7 contains 0.15% Palladium (Pd) to increase its corrosion performance. In this article we report results on the comparative short term corrosion behavior of Ti Gr 7 and a Ruthenium (Ru) containing alloy (Ti Gr 33). Ti Gr 33 also contains a small amount of Pd. Limited electrochemical testing such as polarization resistance and cyclic potentiodynamic curves showed that both alloys have a similar corrosion behavior in the tested environments.

  18. The palladium-catalyzed trifluoromethylation of aryl chlorides.

    PubMed

    Cho, Eun Jin; Senecal, Todd D; Kinzel, Tom; Zhang, Yong; Watson, Donald A; Buchwald, Stephen L

    2010-06-25

    The trifluoromethyl group can dramatically influence the properties of organic molecules, thereby increasing their applicability as pharmaceuticals, agrochemicals, or building blocks for organic materials. Despite the importance of this substituent, no general method exists for its installment onto functionalized aromatic substrates. Current methods either require the use of harsh reaction conditions or suffer from a limited substrate scope. Here we report the palladium-catalyzed trifluoromethylation of aryl chlorides under mild conditions, allowing the transformation of a wide range of substrates, including heterocycles, in excellent yields. The process tolerates functional groups such as esters, amides, ethers, acetals, nitriles, and tertiary amines and, therefore, should be applicable to late-stage modifications of advanced intermediates. We have also prepared all the putative intermediates in the catalytic cycle and demonstrated their viability in the process. PMID:20576888

  19. The Palladium-Catalyzed Trifluoromethylation of Aryl Chlorides

    PubMed Central

    Cho, Eun Jin; Senecal, Todd D.; Kinzel, Tom; Zhang, Yong; Watson, Donald A.

    2010-01-01

    The trifluoromethyl group can dramatically influence the properties of organic molecules, thereby increasing their applicability as pharmaceuticals, agrochemicals, or building blocks for organic materials. Despite the importance of this substituent, no general method exists for its installment onto functionalized aromatic substrates. Current methods either require the use of harsh reaction conditions or suffer from a limited substrate scope. Herein, we report the palladium-catalyzed trifluoromethylation of aryl chlorides under mild conditions, allowing the transformation of a wide range of substrates, including heterocycles, in excellent yields. The process tolerates functional groups such as esters, amides, ethers, acetals, nitriles, and tertiary amines and therefore should be applicable to late-stage modifications of advanced intermediates. We also have prepared all the putative intermediates in the catalytic cycle and demonstrated their viability in the process. PMID:20576888

  20. Optical absorption spectra of palladium doped gold cluster cations.

    PubMed

    Kaydashev, Vladimir E; Janssens, Ewald; Lievens, Peter

    2015-01-21

    Photoabsorption spectra of gas phase Au(n)(+) and Au(n-1)Pd(+) (13 ? n ? 20) clusters were measured using mass spectrometric recording of wavelength dependent Xe messenger atom photodetachment in the 1.9-3.4 eV photon energy range. Pure cationic gold clusters consisting of 15, 17, and 20 atoms have a higher integrated optical absorption cross section than the neighboring sizes. It is shown that the total optical absorption cross section increases with size and that palladium doping strongly reduces this cross section for all investigated sizes and in particular for n = 14-17 and 20. The largest reduction of optical absorption upon Pd doping is observed for n = 15. PMID:25612712

  1. Hydrogen sensing properties of palladium-decorated carbon nanotube circuits

    NASA Astrophysics Data System (ADS)

    Khalap, Vaikunth; Sheps, Tatyana; Kane, Alexander; Collins, Philip

    2008-03-01

    Sensitive hydrogen gas sensors can be fabricated from carbon nanotube circuits decorated with palladium metal, and we have investigated the responsible physical mechanisms using isolated, single-walled carbon nanotubes (SWCNTs). Hydrogen sensitivity arises from two active mechanisms, neither of which is the mere adsorption of Pd onto pristine SWCNTs. The first mechanism relies on the chemical sensitivity of Schottky barriers present when semiconducting SWCNTs are contacted by metals. Pd decoration of the barrier region, or the use of pure Pd as the contact metal, produces a modest H2 sensitivity, if any. A more sensitive mechanism involves Pd-decorated defect sites, which in both metallic and semiconducting SWNTs results in reversible conductance swings of 100%. This presentation will review the temporal dynamics and pressure dependence of both mechanisms.

  2. Palladium-doped Nanoporous Carbon Fibers for Hydrogen Storage

    SciTech Connect

    Gallego, Nidia C [ORNL] [ORNL; Contescu, Cristian I [ORNL] [ORNL; Bhat, Vinay V [ORNL] [ORNL; van Benthem, Klaus [ORNL] [ORNL; Tekinalp, Halil [Clemson University] [Clemson University; Edie, Dan [Clemson University] [Clemson University

    2008-01-01

    Pd-free and Pd-containing activated carbon fibers (Pd-ACF) were synthesized from isotropic pitch as a carbon precursor. The source of Pd was a palladium salt that was premixed with pitch before carbonization. Hydrogen adsorption was measured at near-ambient temperatures (5 to 80 oC) and moderate pressures (up to 20 bar). It was found that adsorption on Pd-ACF is always higher than that on corresponding ACF, and in excess of what it would be expected based solely on formation of Pd hydride. This fact can be explained based on the mechanism of hydrogen spillover. It was also found that temperature and pressure have opposite effects on physisorption and spillover. It was hypothesized that a narrow temperature range exists, where the kinetic advantage of H2 spillover in Pd-ACF overlaps synergistically with the thermodynamic advantage of physisorption, thus contributing to enhanced uptakes compared with the Pd-free carbons.

  3. Comparative modelling of chemical ordering in palladium-iridium nanoalloys

    NASA Astrophysics Data System (ADS)

    Davis, Jack B. A.; Johnston, Roy L.; Rubinovich, Leonid; Polak, Micha

    2014-12-01

    Chemical ordering in "magic-number" palladium-iridium nanoalloys has been studied by means of density functional theory (DFT) computations, and compared to those obtained by the Free Energy Concentration Expansion Method (FCEM) using derived coordination dependent bond energy variations (CBEV), and by the Birmingham Cluster Genetic Algorithm using the Gupta potential. Several compositions have been studied for 38- and 79-atom particles as well as the site preference for a single Ir dopant atom in the 201-atom truncated octahedron (TO). The 79- and 38-atom nanoalloy homotops predicted for the TO by the FCEM/CBEV are shown to be, respectively, the global minima and competitive low energy minima. Significant reordering of minima predicted by the Gupta potential is seen after reoptimisation at the DFT level.

  4. Ozone Sensing Based on Palladium Decorated Carbon Nanotubes

    PubMed Central

    Colindres, Selene Capula; Aguir, Khalifa; Sodi, Felipe Cervantes; Vargas, Luis Villa; Moncayo Salazar, José A.; Febles, Vicente Garibay

    2014-01-01

    Multiwall carbon nanotubes (MWCNTs) were easily and efficiently decorated with Pd nanoparticles through a vapor-phase impregnation-decomposition method starting from palladium acetylacetonates. The sensor device consisted on a film of sensitive material (MWCNTs-Pd) deposited by drop coating on platinum interdigitated electrodes on a SiO2 substrate. The sensor exhibited a resistance change to ozone (O3) with a response time of 60 s at different temperatures and the capability of detecting concentrations up to 20 ppb. The sensor shows the best response when exposed to O3 at 120 °C. The device shows a very reproducible sensor performance, with high repeatability, full recovery and efficient response. PMID:24736133

  5. Ion-paired chiral ligands for asymmetric palladium catalysis

    NASA Astrophysics Data System (ADS)

    Ohmatsu, Kohsuke; Ito, Mitsunori; Kunieda, Tomoatsu; Ooi, Takashi

    2012-06-01

    Conventional chiral ligands rely on the use of a covalently constructed, single chiral molecule embedded with coordinative functional groups. Here, we report a new strategy for the design of a chiral ligand for asymmetric transition-metal catalysis; our approach is based on the development of an achiral cationic ammonium-phosphine hybrid ligand paired with a chiral binaphtholate anion. This ion-paired chiral ligand imparts a remarkable stereocontrolling ability to its palladium complex, which catalyses a highly enantioselective allylic alkylation of ?-nitrocarboxylates. By exploiting the possible combinations of the achiral onium entities with suitable coordinative functionalities and readily available chiral acids, this approach should contribute to the development of a broad range of metal-catalysed, stereoselective chemical transformations.

  6. Selective hydrogenation of phenylacetylene on pumice-supported palladium catalysts

    SciTech Connect

    Duca, D; Liotta, L.F.; Deganello, G. [Universita di Palermo (Italy)] [Universita di Palermo (Italy)

    1995-06-01

    The liquid phase, selective hydrogenation of phenylacetylene on pumice-supported palladium catalysts has been studied for a large range of metallic dispersions (14% {le} D{sub x} {le} 62%). The kinetics were analyzed by a five-parameter mathematical model. The mechanism was determined by the contribution of three basic routes involving only surface species in the rate-determining steps. The hydrogenation of phenylacetylene to styrene is {open_quotes}structure insensitive{close_quotes}. The disappearance rate constant of styrene produced from phenylacetylene is slightly lower than that of phenylacetylene and does not change in the case of the direct hydrogenation of styrene on the same Pd/pumice catalyst. However, Q{sub 3} (the ratio of adsorption constants K{sub Eb}/K{sub St}, where Eb is ethylbenzene and St is styrene), which is typical of a zero-order reaction (Q{sub 3}{r_arrow}0) in the case of the direct hydrogenation, is practically constant (Q{sub 3}{approx_equal}2) in the case of dehydrogenation of styrene produced from phenylacetylene. This is explained by the formation, in the latter case, of polymeric species or other species which are difficult to hydrogenate and by the consequent occupation of active sites so that the adsorption of styrene is inhibited. These species are also thought to be responsible for a flattening effect in the catalytic activity. Activity and selectivity data are critically analyzed and compared with those reported for other supported palladium catalysts. Since Pd/pumice catalysts also show high activity and selectivity at high metal dispersions, they could be of interest for industrial applications. 48 refs., 9 figs., 3 tabs.

  7. Palladium-catalyzed C-N cross-coupling and application to the synthesis of delayed singlet emitters for OLED development

    E-print Network

    Su, Mingjuan

    2014-01-01

    The studies in the present dissertation were aimed at developing and applying synthetic methods mediated by palladium catalysis. In Chapters 1 and 2, the palladium-catalyzed amidation and amination of five-membered ...

  8. Analysis of Central Events in the Interactions of Relativistic Heavy Ions with Emulsion Nuclei at 118.4 GeV

    SciTech Connect

    EL-Falaky, E. [Physics Department, Faculty of Education, Suez Canal University, El-Suez (Egypt)

    2007-02-14

    Data on the multiplicity of the secondary produced particles in the central events from the interactions of 32S with AgBr nuclei at 118.4 GeV. A different selection criteria of the central collision in heavy ion interactions was investigated. The multiplicity distributions of the different produced shower particles (mainly pions) in the central events for each criteria was studied. The multiplicity distributions of the target fragments emitted in the central events was fitted by a Gaussian distribution. The target analysis of the experimental data shows agreement with the limiting fragmentation hypothesis.

  9. 41 CFR 102-118.340 - How does my agency contact the GSA Audit Division?

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ...2012-01-01 false How does my agency contact the GSA Audit Division? 102-118.340... § 102-118.340 How does my agency contact the GSA Audit Division? Your agency may contact the GSA Audit Division by writing...

  10. 41 CFR 102-118.340 - How does my agency contact the GSA Audit Division?

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...2013-07-01 false How does my agency contact the GSA Audit Division? 102-118.340... § 102-118.340 How does my agency contact the GSA Audit Division? Your agency may contact the GSA Audit Division by writing...

  11. 41 CFR 102-118.340 - How does my agency contact the GSA Audit Division?

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ...2014-01-01 false How does my agency contact the GSA Audit Division? 102-118.340... § 102-118.340 How does my agency contact the GSA Audit Division? Your agency may contact the GSA Audit Division by writing...

  12. Polychlorinated biphenyl (118) activates osteoclasts and induces bone resorption in goldfish.

    PubMed

    Yachiguchi, Koji; Matsumoto, Noriko; Haga, Yuki; Suzuki, Motoharu; Matsumura, Chisato; Tsurukawa, Masahiro; Okuno, Toshihiro; Nakano, Takeshi; Kawabe, Kimi; Kitamura, Kei-ichiro; Toriba, Akira; Hayakawa, Kazuichi; Chowdhury, Vishwajit S; Endo, Masato; Chiba, Atsuhiko; Sekiguchi, Toshio; Nakano, Masaki; Tabuchi, Yoshiaki; Kondo, Takashi; Wada, Shigehito; Mishima, Hiroyuki; Hattori, Atsuhiko; Suzuki, Nobuo

    2014-05-01

    To analyze the effect of polychlorinated biphenyl (PCB) 118 on fish bone metabolism, we examined osteoclastic and osteoblastic activities, as well as plasma calcium levels, in the scales of PCB (118)-injected goldfish. In addition, effect of PCB (118) on osteoclasts and osteoblasts was investigated in vitro. Immature goldfish, in which the endogenous effects of sex steroids are negligible, were used. PCB (118) was solubilized in dimethyl sulfoxide at a concentration of 10 ppm. At 1 and 2 days after PCB (118) injection (100 ng/g body weight), both osteoclastic and osteoblastic activities, and plasma calcium levels were measured. In an in vitro study, then, both osteoclastic and osteoblastic activities as well as each marker mRNA expression were examined. At 2 days, scale osteoclastic activity in PCB (118)-injected goldfish increased significantly, while osteoblastic activity did not change significantly. Corresponding to osteoclastic activity, plasma calcium levels increased significantly at 2 days after PCB (118) administration. Osteoclastic activation also occurred in the marker enzyme activities and mRNA expressions in vitro. Thus, we conclude that PCB (118) disrupts bone metabolism in goldfish both in vivo and in vitro experiments. PMID:23247518

  13. 29 CFR 4.118 - Contracts for carriage subject to published tariff rates.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...true Contracts for carriage subject to published tariff rates. 4.118 Section 4...118 Contracts for carriage subject to published tariff rates. The Act, in paragraph...railway line or oil or gas pipeline where published tariff rates are in...

  14. 42 CFR 435.118 - Infants and children under age 19.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ...2012-10-01 false Infants and children under age 19. 435.118 Section 435...435.118 Infants and children under age 19. (a) Basis. This section...must provide Medicaid to children under age 19 whose household income is...

  15. 42 CFR 435.118 - Infants and children under age 19.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ...2013-10-01 false Infants and children under age 19. 435.118 Section 435...435.118 Infants and children under age 19. (a) Basis. This section...must provide Medicaid to children under age 19 whose household income is...

  16. 42 CFR 435.118 - Infants and children under age 19.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ...2014-10-01 false Infants and children under age 19. 435.118 Section 435...435.118 Infants and children under age 19. (a) Basis. This section...must provide Medicaid to children under age 19 whose household income is...

  17. 26 CFR 1.118-2 - Contribution in aid of construction.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ...2011-04-01 false Contribution in aid of construction. 1.118-2 Section...Income § 1.118-2 Contribution in aid of construction. (a) Special rule... (i) The amount is a contribution in aid of construction under paragraph (b)...

  18. 26 CFR 1.118-2 - Contribution in aid of construction.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ...2013-04-01 false Contribution in aid of construction. 1.118-2 Section...Income § 1.118-2 Contribution in aid of construction. (a) Special rule... (i) The amount is a contribution in aid of construction under paragraph (b)...

  19. 26 CFR 1.118-2 - Contribution in aid of construction.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ...2014-04-01 false Contribution in aid of construction. 1.118-2 Section...Income § 1.118-2 Contribution in aid of construction. (a) Special rule... (i) The amount is a contribution in aid of construction under paragraph (b)...

  20. 26 CFR 1.118-2 - Contribution in aid of construction.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ...2010-04-01 false Contribution in aid of construction. 1.118-2 Section...Income § 1.118-2 Contribution in aid of construction. (a) Special rule... (i) The amount is a contribution in aid of construction under paragraph (b)...