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Sample records for p2o5 modificados con

  1. Optimization of the thermodynamic properties and phase diagrams of P2O5-containing systems

    NASA Astrophysics Data System (ADS)

    Hudon, Pierre; Jung, In-Ho

    2014-05-01

    P2O5 is an important oxide component in the late stage products of numerous igneous rocks such as granites and pegmatites. Typically, P2O5 combines with CaO and crystallizes in the form of apatite, while in volatile-free conditions, Ca-whitlockite is formed. In spite of their interest, the thermodynamic properties and phase diagrams of P2O5-containg systems are not well known yet. In the case of the pure P2O5 for example, no experimental thermodynamic data are available for the liquid and the O and O' solid phases. As a result, we re-evaluated all the thermodynamic and phase diagram data of the P2O5 unary system [1]. Optimization of the thermodynamic properties and phase diagrams of the binary P2O5 systems was then performed including the Li2O-, Na2O-, MgO-, CaO-, BaO-, MnO-, FeO-, Fe2O3-, ZnO-, Al2O3-, and SiO2-P2O5 [2] systems. All available thermodynamic and phase equilibrium data were simultaneously reproduced in order to obtain a set of model equations for the Gibbs energies of all phases as functions of temperature and composition. In particular, the Gibbs energy of the liquid solution was described using the Modified Quasichemical Model [3-5] implemented in the FactSage software [6]. Thermodynamic modeling of the Li2O-Na2O-K2O-MgO-CaO-FeO-Fe2O3-Al2O3-SiO2 system, which include many granite-forming minerals such as nepheline, leucite, pyroxene, melilite, feldspar and spinel is currently in progress. [1] Jung, I.-H., Hudon, P. (2012) Thermodynamic assessment of P2O5. J. Am. Ceram. Soc., 95 (11), 3665-3672. [2] Rahman, M., Hudon, P. and Jung, I.-H. (2013) A coupled experimental study and thermodynamic modeling of the SiO2-P2O5 system. Metall. Mater. Trans. B, 44 (4), 837-852. [3] Pelton, A.D. and Blander, M. (1984) Computer-assisted analysis of the thermodynamic properties and phase diagrams of slags. Proc. AIME Symp. Metall. Slags Fluxes, TMS-AIME, 281-294. [4] Pelton, A.D. and Blander, M. (1986) Thermodynamic analysis of ordered liquid solutions by a modified quasichemical approach application to silicate slags. Metall. Trans. B, 17, 805-815. [5] A.D. Pelton, S.A. Decterov, G. Eriksson, C. Robelin and Y. Dessureault (2000) The modified quasichemical model - I Binary solutions. Metall. Mater. Trans. B, 31, 651-660. [6] C.W. Bale, P. Chartrand, S.A. Decterov, G. Eriksson, K. Hack, R. Ben Mahfoud, J. Melançon, A.D. Pelton and S. Petersen. (2002) FactSage Thermochemical Software and Databases. Calphad, 26, 189-228.

  2. Gamma-ray irradiation induced bulk photochromism in WO3-P2O5 glass

    NASA Astrophysics Data System (ADS)

    Shen, Wei; Baccaro, Stefania; Cemmi, Alessia; Xu, Xiaoqing; Chen, Guorong

    2015-11-01

    In the present work, photochromism of WO3-P2O5 glass under gamma-ray irradiation was reported. As-prepared glass samples with different WO3 content are all optically transparent in the visible wavelength range thanks to the addition of a small amount of oxidizing couple Sb2O3-NaNO3. The photochromic properties are identified by transmission spectra of the glasses before and after irradiation. The results show that the irradiation induced darkening results from the reduction of W6+ to W5+ or W4+. The existence of WO6 clusters in glasses of high WO3 content is proved by XPS, which is the main reason for the obvious photochromic effects. The WO3-P2O5 glass is a promising candidate in gamma-ray sensitive detector.

  3. Electrical resistivity surface for FeO-Fe2O3-P2O5 glasses

    NASA Technical Reports Server (NTRS)

    Vaughan, J. G.; Kinser, D. L.

    1975-01-01

    The dc electrical properties and microstructure of x(FeO-Fe2O3)-(100-x)P2O5 glasses were investigated up to a maximum of x = 75 mol %. Results indicate that, in general, the minimum resistivity of the glass does not occur at equal Fe(2+) and Fe(3+) concentrations, although for the special case where x = 55 mol % the minimum does occur at Fe(2+)/Fe total = 0.5, as reported by other investigators. Evidence presented shows that the position of the minimum resistivity is a function of total iron content. The minimum shifts to glasses richer in Fe(2+) at higher total iron concentrations.

  4. P2O5-doping in waste glasses: evolution of viscosity and crystallization processes

    NASA Astrophysics Data System (ADS)

    Tarrago, Mariona; Espuñes, Alex; Garcia-Valles, Maite; Martinez, Salvador

    2015-04-01

    Current concern for environmental preservation is the main motive for the study of new, more sustainable materials. Increasing amounts of sewage sludge are produced in wastewater treatment plants over the world every day. This fact represents a major problem for the municipalities and industries due to the volume of waste and also to the contaminant elements it may bear, which require expensive conditions for disposal in landfills. Vitrification is an established technique in the inertization of different types of toxic wastes (such as nuclear wastes and contaminated soils) that has been used successfully for sewage sludge. Glasses of basaltic composition (43.48SiO2-14.00Al2O3-12.86Fe2O3-10.00CaO-9.94MgO-3.27Na2O-1.96K2O-0.17MnO-0.55P2O5-2.48TiO2) are used as a laboratory analogous of wastes such as sewage sludge and galvanic sludge to study the properties of the inertization matrix. This basaltic matrix is doped by adding 1%, 2%, 3%, 4% and 20% of P5O5 in order to cover the compositional range of phosphate in sewage sludge encountered in the literature. In this study, the focus has been placed in the effect of the concentration of phosphate (P2O5) in glass stability, thermal properties and evolution of viscosity with temperature. The dependence of viscosity on temperature and the thermal behaviour of these glasses are critical parameters in the design of their production process. Regarding the compositional limits of the mixture, it has been observed that melt reactivity is much increased when P2O5 content is over 4%, hindering the glass conformation process. Moreover, stanfieldite (calcium and magnesium phosphate) crystallized during glass making when phosphate concentration approached 20%, hence establishing the upper limit for glass stability. Viscosity is also dramatically increased in this range, hence requiring production amends. Differential thermal analysis has provided nucleation and crystallization temperatures of the glasses around 915°C and 1050°C respectively at phosphate contents up to 4%. Subsequent analysis by X-Ray Diffraction has proved that newly formed phases are iron oxides, Ca - Mg silicates and feldspars. Glass transition temperature (Tg; approximately 635°C) obtained by dilatometry remains almost constant until very high phosphate contents; even then, the increase is not large (650°C at 20% P2O5). Hot-Stage microscopy (HSM) has shown the evolution of viscosity with temperature through the analysis of the morphological evolution of cylindrical probes of glass according to German standard DIN 51730. The annealing range (viscosity between 1013.5 and 1012 is reached at temperatures between 600 and 700°C. The temperatures of the lower limit of the working range (viscosity under 103 Pa-s) are between 1325 and 1375°C; decreasing slightly with the addition of P2O5.

  5. The Effects of Different P2O5 Content and Basicity on Phosphorus Enrichment in the CaO-SiO2-FetO-P2O5 Slag System

    NASA Astrophysics Data System (ADS)

    Zhao, L. H.; Zhang, Y. J.; Zhou, H. M.; Xu, P.; Bao, Y. P.

    2015-11-01

    To improve the additional value of phosphorusenrichment phase in slag, it is necessary to make phosphorus to be enriched in the slag. This paper elaborates the effects of different P2O5 content and basicity on phosphorus enrichment in the CaO-SiO2-FetO-P2O5 slag system through the experiment. Slag morphology can be observed by SEM+EDS and the composition of the phase can be ascertained by XRD. Then Lp and Cp in both phosphorus-enrichment phase and matrix phase were calculated respectively. It has been found that P2O5 content in the slag and the basicity of the slag have effects on the existing form of the phosphorus in the slag, and also influence the distribution ratio of P2O5 in the slag.

  6. Amorphous V2O5-P2O5 as high-voltage cathodes for magnesium batteries.

    PubMed

    Arthur, Timothy S; Kato, Keiko; Germain, Jason; Guo, Jinghua; Glans, Per-Anders; Liu, Yi-Sheng; Holmes, Daniel; Fan, Xudong; Mizuno, Fuminori

    2015-11-01

    A deep investigation of amorphous V2O5-P2O5 powders for magnesium batteries communicates the vital properties to achieving the superior electrochemical performance at a 75?:?25 V2O5?:?P2O5 molar ratio. The manipulation of the inter-layer spacing and amorphization of V2O5 can enhance Mg(2+) diffusion and afford a cathode with high-voltage reversibility. PMID:26360296

  7. Effects of CaO/P2O5 ratio on the structure and elastic properties of SiO2-CaO-Na2O-P2O5 bioglasses.

    PubMed

    Lin, Chung-Cherng; Chen, Shih-Fan; Leung, Kak Si; Shen, Pouyan

    2012-02-01

    The evolution of elastic properties and structure upon the change of CaO/P(2)O(5) ratio in SiO(2)-CaO-Na(2)O-P(2)O(5) glasses (45S5-derived and 55S4-derived) at ambient conditions has been studied by using both Brillouin and Raman spectroscopy coupled with X-ray diffraction. Under the same SiO(2)/Na(2)O ratio, it is found that a decrease in CaO/P(2)O(5) molar ratio has caused a more-polymerized silicate network via a net consumption of Q(0), Q(1), and Q(2) species yet enriching in Q(3) and Q(4) species. Brillouin experiments revealed that all the bulk, shear and Young's moduli of the glasses studied increases with the increase of CaO/P(2)O(5) molar ratio. The unexpected variation trend in shear modulus can be correlated to the contribution from cohesion, the less-polymerized phosphate Q species, and density. Compared to the 45S5-derived, the more-polymerized 55S4-deived glass has a lower bulk but slightly higher shear modulus at the given CaO/P(2)O(5) ratio. PMID:22109904

  8. Electrical properties and FTIR spectra of ZnO-PbO-P 2O 5 glasses

    NASA Astrophysics Data System (ADS)

    Mansour, E.; El-Damrawi, G.

    2010-04-01

    Glasses of chemical composition xZnO.(60- x)PbO.40P 2O 5 ( x=10-60 mol%) have been prepared and investigated for FTIR, density, molar volume ( V m), and DC conductivity. Both density and molar volume decreases systematically with composition. FTIR analysis indicates that ?30 mol% (PbO and/or ZnO) enters the glass structure as formers. Below and above that concentration a decreasing amount of Pb 2+ (Zn 2+) is incorporated into the network as modifier. The band at 1018-1025 cm -1 can be considered as an indication for the presence of P-O-Pb(Zn) linkages. By introducing ZnO into the glasses, P-O-Pb(Zn) linkages may be formed by opening up P?O bonds of PO 4 tetrahedra. For all glasses the linear dependence of the conductivity indicates an ionic conduction due to Pb 2+ and/or Zn 2+ ions. The increase in activation energy by about 68%, and also the decrease in the conductivity at certain temperature not only attributed to an increase in the covalency of the glass matrix upon replacing PbO by ZnO but also due to an increase in the strain energy because of the decrease in V m of the studied glasses. It is found that the conductivity of ZnO-PbO-P 2O 5 glasses is four orders of magnitude higher than that of ZnO-PbO-B 2O 3 glasses containing the same amount of ZnO measured at the same temperature. In addition, both conductivities decrease with composition which may indicate that the origin of these decreases may be the same regardless the type of the host glass former. The differences in electronegativity and size of Zn 2+ and Pb 2+ divalent ions and the structural changes that will follow in the network govern the conductivity behaviour of Zn-Pb containing glasses.

  9. P2O5 assisted green synthesis of multicolor fluorescent water soluble carbon dots.

    PubMed

    Babar, Dipak Gorakh; Sonkar, Sumit Kumar; Tripathi, Kumud Malika; Sarkar, Sabyasachi

    2014-03-01

    A low cost synthesis of multicolor fluorescent carbon dots (C-dots) from edible sugars is described here. Common sugars like dextrose, lactose or maltose in aqueous medium gets dehydrated using phosphorus pentoxide (P2O5). The reaction is facile and completed within few minutes to form insoluble carbon (C-dots) mostly having the graphitic (G-band, Raman) sp2 hybridized carbon atoms (C-atoms). This insoluble carbon on oxidative treatment with nitric acid produced disordered sp3 (D-band retaining G-band, Raman) hybridized C-atoms, originated from the graphitic pool with sp2 hybridized C-atoms. This high density assimilation of self passivated "surfacial defects" become emissive during electronic transitions. Surfacial defects due to high degree of electrophilic carboxylation create the water soluble version of multicolor fluorescent C-dots as "water soluble fluorescent carbon dots" (wsFCDs). wsFCDs being itself self-passivated imposes the tunable multicolor emission throughout the visible spectrum without having any external coating and surface passivation and could be used as multicolor fluorescent probe especially in the emerging field of optical bio-imaging. PMID:24745229

  10. Proton conduction of MO-P2O5 glasses (M = Zn, Ba) containing a large amount of water

    NASA Astrophysics Data System (ADS)

    Sumi, Hirofumi; Nakano, Yuki; Fujishiro, Yoshinobu; Kasuga, Toshihiro

    2015-07-01

    Zinc and barium phosphate glasses show good proton conductivity at intermediate temperature around 200 °C. Infrared spectra and 1H magic angle spinning-nuclear magnetic resonance (MAS-NMR) spectra proposed that a 30 mol%ZnO-70 mol%P2O5 glass melted at 800 °C has a large amount of 'mobile' protons. The proton conductivity at 250 °C was measured to be 1 × 10-3 S/cm. A H2-air fuel cell using the ZnO-P2O5 glass electrolyte of 1.8 mm in thickness showed the maximum power density of 1.2 mW/cm2 at 200 °C.

  11. Selective Crystallization Behavior of CaO-SiO2-Al2O3-MgO-FetO-P2O5 Steelmaking Slags Modified through P2O5 and Al2O3

    NASA Astrophysics Data System (ADS)

    Wang, Zhanjun; Sun, Yongqi; Sridhar, Seetharaman; Zhang, Mei; Guo, Min; Zhang, Zuotai

    2015-10-01

    In this study, the selective crystallization behavior of synthetic FetO-rich steelmaking slags modified by P2O5 and Al2O3 additions was explored using non-isothermal differential scanning calorimetry, X-ray diffraction, and field emission scanning electron microscopy techniques. Continuous cooling transformation diagrams of Fe-enriched and P-enriched phases were constructed. It was found that P2O5 addition can suppress the crystallization due to the increasing viscosity caused by increasing degree of polymerization; however, an increase of Al2O3 content accelerated the precipitation of dystectic MgFeAlO4, copolymerized by [AlO4]-tetrahedra and [FeO4]-tetrahedra units. It was also noted that the content of phosphorus in P-enriched phase can reach a high value as 28.71 wt pct for the slags modified by 15.17 wt pct Al2O3. The non-isothermal crystallization kinetics derived from activation energy and the structure of the slags explained by Raman spectra were further analyzed, which was well in accordance with the above analysis.

  12. FT-IR and thermoluminescence investigation of P2O5-BaO-K2O glass system

    NASA Astrophysics Data System (ADS)

    Ivascu, C.; Timar-Gabor, A.; Cozar, O.

    2013-11-01

    The 0.5P2O5?xBaO?(0.5-x)K2O glass system (0?x?0.5mol%) is investigated by FT-IR and thermoluminescence as a possible dosimetic material. FT-IR spectra show structural network modifications with the composition variations of the studied glasses. The predominant absorption bands are characterized by two broad peaks near 500 cm-1, two weak peaks around 740 cm-1 and three peaks in the 900-1270 cm-1 region. The shift in the position of the band assigned to asymmetric stretching of PO2- group, ?as(PO2-) modes from ˜1100 cm-1 to 1085 cm-1 and the decrease in its relative intensity with the increasing of K2O content shows a network modifier role of this oxide.. Luminescence investigations show that by adding modifier oxides in the phosphate glass a dose dependent TL signals result upon irradiation. Thus P2O5-BaO-K2O glass system is a possible candidate material for dosimetry in the dose 0 - 50 Gy range.

  13. Effect of P2O5 and MnO2 on crystallization of magnetic glass ceramics

    PubMed Central

    Abdel-Hameed, Salwa A.M.; Marzouk, Mohamed A.; Farag, Mohamed M.

    2013-01-01

    This work pointed out the effect of adding P2O5 and/or MnO2 on the crystallization behavior of magnetic glass ceramic in the system Fe2O3·ZnO·CaO·SiO2·B2O3. The differential thermal analysis of the quenched samples revealed decrease in the thermal effects by adding P2O5 and/or MnO2 to the base sample. The X-ray diffraction patterns show the development of nanometric magnetite crystals in a glassy matrix. Heat treatment at 800 °C for 2 h, under reducing atmosphere, caused an increase in the amount of the crystallized magnetite with the appearance of minor hematite and Ca2SiO4. The transmission electron microscope revealed a crystallite size in the range 10–30 nm. Magnetic hysteresis cycles were analyzed with a maximum applied field of 25 kOe at room temperature. The prepared magnetic glass ceramics are expected to be useful for localized treatment of cancer. PMID:25685522

  14. Phase equilibria in the oxide system Nd 2O 3-K 2O-P 2O 5

    NASA Astrophysics Data System (ADS)

    Szczygie?, Irena; Znamierowska, Teresa; Mizer, Dagmara

    2010-07-01

    A phase equilibria diagram of the partial system NdPO 4-K 3PO 4-KPO 3 has been developed as part of the research aimed at determining the phase equilibrium relationships in the oxide system Nd 2O 3-K 2O-P 2O 5. The investigations were conducted using thermoanalytical techniques, X-ray powder diffraction analysis and reflected-light microscopy. Three isopleths existing between: K 3Nd(PO 4) 2-K 4P 2O 7, NdPO 4-K 5P 3O 10 and NdPO 4-K 4P 2O 7 have been identified in the partial NdPO 4-K 3PO 4-KPO 3 system. Previously unknown potassium-neodymium phosphate "K 4Nd 2P 4O 15" has been discovered in the latter isopleth section. This phosphate exists in the solid phase up to a temperature of 890 °C at which it decomposes into the parent phosphates NdPO 4 and K 4P 2O 7. Four invariant points: two quasi-ternary eutectics, E 1 (1057 °C) and E 2 (580 °C) and two quasi-ternary peritectics, P 1 (1078 °C) and P 2 (610 °C), occur in the NdPO 4-K 3PO 4-KPO 3 region.

  15. Life and failure mechanism prediction of eco-friendly P2O5-SnO2-B2O3 glass frits

    NASA Astrophysics Data System (ADS)

    Choi, Hyoung-Seuk; Choi, Duck-Kyun

    2013-09-01

    Glass frits are used widely in the VFD, PDP, LCD, and OLED displays, solar cells, and automobiles. It is essential for glass frits to exhibit material properties such as low melting temperatures and coefficient of thermal expansion close to glass to prevent thermal shock and to lower the thermal stress. Glass frit containing 60%-85% of PbO lowers the melting temperature. However, PbO causes environmental pollution. In this study, we developed P2O5-SnO2-B2O3 glass frits and carried out life tests on these systems. In addition, life tests were also carried out on Pb-containing glass frits (VFD) for comparison to predict the life of the P2O5-SnO2-B2O3 systems. Subsequently, the failure mechanisms of VFD and Pb-free P2O5-SnO2-B2O3 glass frits were analyzed.

  16. Thermoluminescence investigations on xY2O3 (60-x)P2O5·40SiO2 vitroceramics.

    PubMed

    Biró, Barna; Pascu, Andrada; Timar-Gabor, Alida; Simon, Viorica

    2015-04-01

    Thermoluminescence properties of xY2O3·(60-x)P2O5·40SiO2 vitroceramic compounds doped with xY2O3 at various concentrations (0?x?30mol%) were studied. Compounds with reduced Y2O3 concentration showed unsatisfactory dosimetric properties, while the vitroceramics composed of 20Y2O3·40P2O5·40SiO2 and 30Y2O3·30P2O5·40SiO2 exhibited bright signals, linear dose response and minimum detectable doses of 16mGy and 4mGy, respectively. Moreover, 30mol% Y2O3 doped vitroceramic exhibited good repeatability, acceptable batch homogeneity and poor fading signal, features that are recommending this material for dosimetry purposes. PMID:25637884

  17. Influence of phosphorous precursors on spectroscopic properties of Er3+-activated SiO2-HfO2-P2O5 planar waveguides

    NASA Astrophysics Data System (ADS)

    Vasilchenko, I.; Carpentiero, A.; Chiappini, A.; Chiasera, A.; Vaccari, A.; Lukowiak, A.; Righini, G. C.; Vereshagin, V.; Ferrari, M.

    2014-12-01

    (70-x)SiO2-30HfO2 -xP2O5 (x= 5, 10 mol %) glass planar waveguides activated by 0.5 mol% Er3+ ions were prepared by sol-gel route. Several phosphorous precursors have been investigated for the synthesis of a dielectric stable sol useful for the realization of planar waveguides. The waveguides were investigated by different diagnostic techniques. The optical properties such as refractive index, thickness, number of propagating modes and attenuation coefficient were measured at 632.8 and 543.5 nm by prism coupling technique. Transmission measurements were carried out in order to assess the transparency of the deposited films. Photoluminescence measurements and lifetime decay curves of the Er3+ transition (4I13/2 ? 4I15/2) were performed in order to investigate the role of P2O5.

  18. Role of modifier oxide in emission spectra and kinetics of Er-Ho codoped Na 2SO 4-MO-P 2O 5 glasses

    NASA Astrophysics Data System (ADS)

    Rao, P. Raghava; Venkatramaiah, N.; Gandhi, Y.; Kumar, V. Ravi; Kityk, I. V.; Veeraiah, N.

    2012-02-01

    The glasses of the composition 19Na 2SO 4-20MO-60P 2O 5: 1.0Ho 2O 3/1.0Er 2O 3 (M = Mg, Ca, and Ba) have been synthesized. Optical absorption and fluorescence spectra (in the spectral range 350-2100 nm were studied at ambient temperature. The spectra were characterized using Judd-Ofelt theory. From the luminescence spectra, various radiative properties like transition probability A, branching ratio ? and the radiative life time ? for blue (B), green (G) and red (R) emission levels of these glasses have been evaluated. The energy transfer between the two rare earth ions (Ho 3+ and Er 3+) in co-doped Na 2SO 4-MO-P 2O 5 glass systems in the visible and NIR regions has also been investigated. Highest intensity, the highest quantum efficiency and maximum energy transfer with low phonon losses of B, G, and R lines has been observed in BaO mixed glasses. The reasons for such higher values of these parameters have been discussed in the light of varying field strengths at the rare earths ion site due to replacement of one modifier oxide with the other. The enhanced intensity of NIR emission (at 2.0 ?m) has also been discussed in terms of cross relaxation of Er 3+ ions from 4I 13/2 level to 5I 7 of Ho 3+ ions.

  19. Strong white light in P2O5-Li2O-Yb2O3-Sb2O3 glass doped with Pr3+ion

    NASA Astrophysics Data System (ADS)

    Ming, Chengguo; Han, Yingdong; Song, Feng; Ren, Xiaobin; An, Liqun

    2013-01-01

    P2O5-Li2O-Yb2O3-Sb2O3 glasses doped with Pr3+ ion had been prepared to explore white-light-emitting materials. The photoluminescence spectra of the glasses were measured under 270 nm excitation. The emission color of the glass doped with 2 mol% Pr3+ ion was white to the naked eye, and the CIE coordinates (0.336, 0.319) of the sample were close to the standard equal energy white-light illumination (x=0.333, y=0.333). The present working mechanism of the commercial white-LEDs is that a yellow phosphor is excited by a blue LED chip. The emission characters are restricted by the intensity of the blue light and the thickness of the phosphor. However, the luminescent characters of our materials are not effected by the pumping light. Thus, our materials will be helpful in developing white-light-emitting materials.

  20. Structure, dielectric and bioactivity of P2O5-CaO-Na2O-B2O3 bioactive glass

    NASA Astrophysics Data System (ADS)

    Maheswaran, A.; Hirankumar, G.; Heller, Nithya; Karthickprabhu, S.; Kawamura, Junichi

    2014-06-01

    Bioactive phosphate glasses have been widely investigated for bone repair. Phosphate glass system of 47P2O5-30.5CaO-(22.5-x)Na2O-xB2O3 has been prepared by melt quenching technique. From the Raman analysis, it is confirmed that phosphate network form metaphosphate structure. Bioactivity of the glass is studied by immersing the prepared glass in simulated body fluid (SBF). All the glasses exhibited bioactivity after soaking in SBF. Addition of B2O3 to the glass by replacing the Na2O produces considerable effect on the dielectric and bioactivity of the glass. Ion dynamics are also analyzed through imaginary modulus and imaginary dielectric permittivity.

  1. In-vitro study of copper doped SiO2-CaO-P2O5 system for bioactivity and antimicrobial properties

    NASA Astrophysics Data System (ADS)

    Kaur, Kulwinder; Singh, K. J.; Anand, Vikas; Kaur, Harpreet; Arora, Daljit Singh

    2015-08-01

    Samples of the xCuO-(45-x)CaO-10P2O5-45SiO2 system (x varies from 0 to 4 mole%) have been synthesized for application as biomaterials to slow or inhibit the growth of living organisms (fungi and other pathogenic microorganisms) by the combination of sol-gel and co-precipitation processes. Prepared samples have been characterized by X-Ray Diffraction, Fourier Transform Infra-Red and Field Emission Scanning Electron Microscopy techniques before and after immersion in simulated body fluid. Antimicrobial activity of samples has been investigated against Staphylococcus aureus. Releasing of Cu2+and other ions in the simulated body fluid has been determined by Atomic Absorption Spectroscopy to ensure the use of prepared material as biomaterial with good antibacterial properties.

  2. In vitro bioactivity evaluation, mechanical properties and microstructural characterization of Na2O-CaO-B2O3-P2O5 glasses

    NASA Astrophysics Data System (ADS)

    Abo-Naf, Sherief M.; Khalil, El-Sayed M.; El-Sayed, El-Sayed M.; Zayed, Hamdia A.; Youness, Rasha A.

    2015-06-01

    Na2O-CaO-B2O3-P2O5 glasses have been prepared by the melt-quenching method. B2O3 content was systematically increased from 5 to 30 mol%, at the expense of P2O5, in the chemical composition of these glasses. Density, Vickers microhardness and fracture toughness of the prepared glasses were measured. In vitro bioactivity of the glasses was assessed by soaking in the simulated body fluid (SBF) at 37 ± 0.5 °C for 3, 7, 14 and 30 days. The glasses were tested in the form of glass grains as well as bulk slabs. The structure and composition of the solid reaction products were analyzed using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM) and scanning electron microscopy (SEM) coupled with energy dispersive spectroscopy (EDS). The kinetics of degradation of the glass particles were monitored by measuring the weight loss of the particles and the ionic concentration of Ca, P and B in the SBF solution using inductive coupled plasma-atomic emission spectroscopy (ICP-AES). The obtained results revealed the formation of a bioactive hydroxyapatite (HA) layer, composed of nano-crystallites, on the surface of glass grains after the in vitro assays. The results have been used to understand the formation of HA as a function of glass composition and soaking time in the SBF. It can be pointed out that increasing B2O3 content in glass composition enhances the bioactivity of glasses. The nanometric particle size of the formed HA and in vitro bioactivity of the studied glasses make them possible candidates for tissue engineering application.

  3. EXAFS and x-ray structural studies of (Tb2O3)0.26(P2O5)0.74 metaphosphate glass

    NASA Astrophysics Data System (ADS)

    Bowron, D. T.; Newport, R. J.; Rainford, B. D.; Saunders, G. A.; Senin, H. B.

    1995-03-01

    Although the metaphosphate glasses R(PO3)3 containing high concentrations of rare-earth R3+ ions have potentially important applications in optical communications and laser technologies, there is little previous information about their structures. To establish the essential features of the structure of such a glass, the complementary techniques of x-ray diffraction and extended x-ray-absorption fine structure (EXAFS) have been used upon the terbium metaphosphate glass, having a composition found by electron probe microanalysis to be (Tb2O3)0.26(P2O5)0.74. The combination of the two techniques allows for a more comprehensive interpretation of the structural data, since each method suffers from differing analytical problems, notably the composite radial distribution function obtained from diffraction, and the present lack of a good calibrant for the EXAFS experiment. The diffraction results prove to be consistent with a network model dominated by a phosphate glass skeleton constructed from PO4 tetrahedra bonded to adjacent tetrahedra via bridging oxygen atoms. This previously unestablished structural model has been used formerly to interpret a wide range of thermal, ultrasonic, and optical properties. The EXAFS, being an atom-type specific probe, have provided the more direct information on the local structure at the rare-earth ion site in vitreous (Tb2O3)0.26(P2O5)0.74: notably a strong correlation in 2.25 Å, associated with an average coordination number of 7+/-1 for oxygen atoms surrounding a Tb3+ ion.

  4. Energy transfer and optical gain properties of P2O5-ZnO-LiF: (Yb3+, Er3+) glasses

    NASA Astrophysics Data System (ADS)

    Reddy, C. Parthasaradhi; Naresh, V.; Reddy, K. T. Ramakrishna; Buddhudu, S.

    2015-06-01

    The present paper reports on the results pertaining to the emission properties of 0.5 mol% Er3+ and together (0.5 Yb3+ /0.5 Er3+) doped PZL (P2O5-ZnO-LiF) glasses prepared by a melt quenching method. From the optical absorption data, absorption and stimulated emission cross-sections have been evaluated using McCumber's theory and further cross-sectional gain has also been computed for Yb3+/Er3+ doped glass. On exciting the single (Er3+) and dual rare earth ions (Yb3+/Er3+) doped glass sample at ?exci = 379 nm, three emission bands in the visible region 2H11/2?4I15/2 (526 nm), 4S3/2?4I15/2 (549 nm) and 4F9/2?4I15/2 (664 nm) are observed and while at ?exci = 980 nm (Laser Diode) excitation a broad emission at 1530 nm attributed to 4H13/2?4I15/2 is observed in the NIR region. The enhancement in visible and NIR emission intensities with the addition of Yb3+ to Er3+ due to an energy transfer process from Yb3+ to Er3+ has been explained in terms of an energy level diagram.

  5. Neutron scattering study on cathode LiMn2O4 and solid electrolyte 5(Li2O)(P2O5)

    NASA Astrophysics Data System (ADS)

    Kartini, E.; Putra, Teguh P.; Jahya, A. K.; Insani, A.; Adams, S.

    2014-09-01

    Neutron scattering is very important technique in order to investigate the energy storage materials such as lithium-ion battery. The unique advantages, neutron can see the light atoms such as Hydrogen, Lithium, and Oxygen, where those elements are negligible by other corresponding X-ray method. On the other hand, the energy storage materials, such as lithium ion battery is very important for the application in the electric vehicles, electronic devices or home appliances. The battery contains electrodes (anode and cathode), and the electrolyte materials. There are many challenging to improve the existing lithium ion battery materials, in order to increase their life time, cyclic ability and also its stability. One of the most scientific challenging is to investigate the crystal structure of both electrode and electrolyte, such as cathodes LiCoO2, LiMn2O4 and LiFePO4, and solid electrolyte Li3PO4. Since all those battery materials contain Lithium ions and Oxygen, the used of neutron scattering techniques to study their structure and related properties are very important and indispensable. This article will review some works of investigating electrodes and electrolytes, LiMn2O4 and 5(Li2O)(P2O5), by using a high resolution powder diffraction (HRPD) at the multipurpose research reactor, RSG-Sywabessy of the National Nuclear Energy Agency (BATAN), Indonesia.

  6. Thermal and structural characterization of erbium-doped borosilicate fibers with low silica content containing various amounts of P2O5 and Al2O3

    NASA Astrophysics Data System (ADS)

    Bourhis, Kevin; Shpotyuk, Yaroslav; Massera, Jonathan; Aallos, Ville; Jouan, Thierry; Boussard-Plédel, Catherine; Bureau, Bruno; Petit, Laeticia; Koponen, Joona; Hupa, Leena; Hupa, Mikko; Ferraris, Monica

    2014-11-01

    We report results on the processing and characterization of different glass preforms and single core fibers within the SiO2-Na2O-B2O3-Er2O3-P2O5-Al2O3 system. Micro-Raman spectroscopy was used to identify post-draw structural modification. The differences in the micro-Raman spectra recorded on the preform and on the fiber glass were attributed to a change in the structure induced by the drawing process. Changes in the silicate network organization and small scale molecular orientation within the glass matrix are suspected to occur during the fiber drawing process. We found that the extent in the changes between the preform and fiber properties depend on the glass composition. The glass network of the Al-containing fiber is expected to be less sensitive to the drawing process than that of the fiber matrix as the network of this Al-containing fiber is formed by a larger number of Si-BO units in the network and neutral three-coordinated boron compared to the network of the fiber matrix. From the micro-Raman spectra, formation of small crystals is suspected to occur in the P-containing glasses during the fiber drawing process. The resulting fibers were found to have propagation losses at 1330 nm and Er3+ absorption between (7 ± 1) and (25 ± 1) dB/m and (36 ± 1) and (47 ± 1) dB/m, respectively, depending on the glass composition.

  7. Effect of boron oxide addition on fibre drawing, mechanical properties and dissolution behaviour of phosphate-based glass fibres with fixed 40, 45 and 50?mol% P2O5

    PubMed Central

    Sharmin, Nusrat; Parsons, Andrew J; Rudd, Chris D

    2014-01-01

    Previous studies investigating manufacture of phosphate-based glass fibres from glasses fixed with P2O5 content less than 50?mol% showed that continuous manufacture without breakage was very difficult. In this study, nine phosphate-based glass formulations from the system P2O5-CaO-Na2O-MgO-B2O3 were prepared with P2O5 contents fixed at 40, 45 and 50?mol%, where Na2O was replaced by 5 and 10?mol% B2O3 and MgO and CaO were fixed to 24 and 16?mol%, respectively. The effect of B2O3 addition on the fibre drawing, fibre mechanical properties and dissolution behaviour was investigated. It was found that addition of 5 and 10?mol% B2O3 enabled successful drawing of continuous fibres from glasses with phosphate (P2O5) contents fixed at 40, 45 and 50?mol%. The mechanical properties of the fibres were found to significantly increase with increasing B2O3 content. The highest tensile strength (1200?±?130?MPa) was recorded for 45P2O5-16CaO-5Na2O-24MgO-10B2O3 glass fibres. The fibres were annealed, and a comparison of the mechanical properties and mode of degradation of annealed and non-annealed fibres were investigated. A decrease in tensile strength and an increase in tensile modulus were observed for the annealed fibres. An assessment of the change in mechanical properties of both the annealed and non-annealed fibres was performed in phosphate-buffered saline (PBS) at 37? for 28 and 60 days, respectively. Initial loss of mechanical properties due to annealing was found to be recovered with degradation. The B2O3-containing glass fibres were found to degrade at a much slower rate as compared to the non-B2O3-containing fibres. Both annealed and non-annealed fibres exhibited a peeling effect of the fibre's outer layer during degradation. PMID:24939962

  8. The influence of phosphorus precursors on the synthesis and bioactivity of SiO2-CaO-P 2O 5 sol-gel glasses and glass-ceramics.

    PubMed

    Siqueira, Renato Luiz; Zanotto, Edgar Dutra

    2013-02-01

    Bioactive glasses and glass-ceramics of the SiO(2)-CaO-P(2)O(5) system were synthesised by means of a sol-gel method using different phosphorus precursors according to their respective rates of hydrolysis-triethylphosphate (OP(OC(2)H(5))(3)), phosphoric acid (H(3)PO(4)) and a solution prepared by dissolving phosphorus oxide (P(2)O(5)) in ethanol. The resulting materials were characterised by differential scanning calorimetry and thermogravimetry, X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy coupled with energy dispersive X-ray spectroscopy and by in vitro bioactivity tests in acellular simulated body fluid. The different precursors significantly affected the main steps of the synthesis, beginning with the time required for gel formation. The most striking influence of these precursors was observed during the thermal treatments at 700-1,200 °C that were used to convert the gels into glasses and glass-ceramics. The samples exhibited very different mineralisation behaviours; especially those prepared using the phosphoric acid, which had a reduced onset temperature of crystallisation and an increased resistance to devitrification. However, all resulting materials were bioactive. The in vitro bioactivity of these materials was strongly affected by the heat treatment temperature. In general, their bioactivity decreased with increasing treatment temperature. For crystallised samples obtained above 900 °C, the bioactivity was favoured by the presence of two crystalline phases: wollastonite (CaSiO(3)) and tricalcium phosphate (?-Ca(3)(PO(4))(2)). PMID:23114636

  9. Influences of TiO2 Addition on the Crystallization Behavior, Microstructure, and Magnetic Properties of Li2O-MnO2-Fe2O3-CaO-P2O5-SiO2 Glasses

    NASA Astrophysics Data System (ADS)

    Cheng, Huy-Zu; Lin, Huey-Jiuan; Wang, Moo-Chin; Wang, Chien-Fa; Hsi, Chi-Shiung; Zhao, XiuJian; Jiang, Hong; Li, Chang-Jiu; Lu, Peng

    2015-05-01

    Influences of TiO2 addition on the phase transformation, microstructure, and magnetic properties of Li2O-MnO2-Fe2O3-CaO-P2O5-SiO2 (LMFCPS) glass have been studied using DTA, XRD, SEM, EDS, TEM, SAED, and SQUID. When LMFCPS glass, with and without TiO2 content, is crystallized at 1123 K (850 °C) for 2 hours, the magnetite (FeFe2O4), ?-wollastonite (?-CaSiO3), lithium orthophosphate (Li3PO4), and triphylite (Li(Mn0.5Fe0.5)PO4) phases are formed. The ?-wollastonite and lithium silicate formed with evident directionality were observed in the LMFCPS glass-ceramics without adding TiO2. However, when the LMFCPS glass with various TiO2 content is crystallized at 1123 K (850 °C) for 16 hours, very small remnant magnetic induction and coercive field hysteresis loops were found showing the ferromagnetic property in a magnetic field smaller than 2000 Oe. Additionally, when LMFCPS glass with various TiO2 contents is crystallized at 1123 K (850 °C) for 16 hours, the glass-ceramics showed super-paramagnetic property in a magnetic field of 60 kOe due to the small grains of the iron-rich phases.

  10. Synthesis, cytotoxicity, and hydroxyapatite formation in 27-Tris-SBF for sol-gel based CaO-P2O5-SiO2-B2O3-ZnO bioactive glasses

    PubMed Central

    Kaur, Gurbinder; Pickrell, G.; Kimsawatde, G.; Homa, D.; Allbee, H. A.; Sriranganathan, N.

    2014-01-01

    CaO-P2O5-SiO2-B2O3-ZnO bioactive glasses were prepared via an optimized sol–gel method. The current investigation was focused on producing novel zinc based calcium phosphoborosilicate glasses and to evaluate their mechanical, rheological, and biocompatible properties. The morphology and composition of these glasses were studied using X-ray diffraction (XRD) and scanning electron microscopy (SEM). The particle size, mechanical and flexural strength was also determined. Furthermore, the zeta potential of all the glasses were determined to estimate their flocculation tendency. The thermal analysis and weight loss measurements were carried out using differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) respectively. For assessing the in-vitro bioactive character of synthesized glasses, the ability for apatite formation on their surface upon their immersion in simulated body fluid (SBF) was checked using SEM and pH measurements. MTS assay cytotoxicity assay and live-dead cell viability test were conducted on J774A.1 cells murine macrophage cells for different glass concentrations. PMID:24637634

  11. Studies on influence of aluminium ions on the bioactivity of B2O3-SiO2-P2O5-Na2O-CaO glass system by means of spectroscopic studies

    NASA Astrophysics Data System (ADS)

    Mohini, G. Jagan; Krishnamacharyulu, N.; Sahaya Baskaran, G.; Rao, P. Venkateswara; Veeraiah, N.

    2013-12-01

    Bioactive multi component glasses of the composition of 27.4 B2O3-6.4 SiO2-2.5 P2O5-25.5 Na2O-(38.2 - x) CaO: x Al2O3 (x between 0 and 3.2) were synthesized, by melt quenching technique and their bioactivity was investigated as a function of Al2O3 concentration. Initially, optical absorption and infrared spectra were recorded and analyzed in order to have some pre-understanding over structural aspects of the glasses. For understanding the bioactivity, the samples were immersed in simulated body fluid (SBF) solution for prolonged times (?30 days) and the weight loss measurements were carried out. The spectroscopic studies were repeated on the post immersed samples. From the comparison of the analysis of the spectroscopic data of both pre-immersed and post-immersed samples together with the information on variation of pH value of residual solution as a function of immersion time, it is concluded that the participation of aluminium ions in tetrahedral positions is hindrance for the formation of HA layer and for the bioactivity of the samples.

  12. Influence of heat treatments upon the mechanical properties and in vitro bioactivity of ZrO2-toughened MgO-CaO-SiO2-P2O5-CaF2 glass-ceramics.

    PubMed

    Li, Huan-Cai; Wang, Dian-Gang; Meng, Xiang-Guo; Chen, Chuan-Zhong

    2014-09-01

    Zirconia-toughened MgO-CaO-SiO2-P2O5-CaF2 glass-ceramics are prepared using sintering techniques, and a series of heat treatment procedures are designed to obtain a glass-ceramic with improved properties. The crystallization behavior, phase composition, and morphology of the glass-ceramics are characterized. The bending strength, elastic modulus, fracture toughness, and microhardness of the glass-ceramics are investigated, and the effect mechanism of heat treatments upon the mechanical properties is discussed. The bioactivity of glass-ceramics is then evaluated using the in vitro simulated body fluid (SBF) soaking test, and the mechanism whereby apatite forms on the glass-ceramic surfaces in the SBF solution is discussed. The results indicate that the main crystal phase of the G-24 sample undergoing two heat treatment procedures is Ca5(PO4)3F (fluorapatite), and those of the G-2444 sample undergoing four heat treatment procedures are Ca5(PO4)3F and ?-CaSiO3 (?-wollastonite). The heat treatment procedures are found to greatly influence the mechanical properties of the glass-ceramic, and an apatite layer is induced on the glass-ceramic surface after soaking in the SBF solution. PMID:25280855

  13. Synthesis, cytotoxicity, and hydroxyapatite formation in 27-Tris-SBF for sol-gel based CaO-P2O5-SiO2-B2O3-ZnO bioactive glasses.

    PubMed

    Kaur, Gurbinder; Pickrell, G; Kimsawatde, G; Homa, D; Allbee, H A; Sriranganathan, N

    2014-01-01

    CaO-P2O5-SiO2-B2O3-ZnO bioactive glasses were prepared via an optimized sol-gel method. The current investigation was focused on producing novel zinc based calcium phosphoborosilicate glasses and to evaluate their mechanical, rheological, and biocompatible properties. The morphology and composition of these glasses were studied using X-ray diffraction (XRD) and scanning electron microscopy (SEM). The particle size, mechanical and flexural strength was also determined. Furthermore, the zeta potential of all the glasses were determined to estimate their flocculation tendency. The thermal analysis and weight loss measurements were carried out using differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) respectively. For assessing the in-vitro bioactive character of synthesized glasses, the ability for apatite formation on their surface upon their immersion in simulated body fluid (SBF) was checked using SEM and pH measurements. MTS assay cytotoxicity assay and live-dead cell viability test were conducted on J774A.1 cells murine macrophage cells for different glass concentrations. PMID:24637634

  14. Influence of local structural disorders on spectroscopic properties of multi-component CaF2-Bi2O3-P2O5-B2O3 glass ceramics with Cr2O3 as nucleating agent

    NASA Astrophysics Data System (ADS)

    Suresh, S.; Narendrudu, T.; Yusub, S.; Suneel Kumar, A.; Ravi Kumar, V.; Veeraiah, N.; Krishna Rao, D.

    2016-01-01

    Multi-component CaF2-Bi2O3-P2O5-B2O3 glasses doped with different concentrations of Cr2O3 were crystallized through heat treatment. The prepared glass ceramic samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and differential thermal analysis (DTA). Spectroscopic studies viz., optical absorption, Fourier transform infrared (FTIR), Raman and electron paramagnetic resonance (EPR) were carried out. The XRD, SEM and DTA studies indicated that the samples contain different crystalline phases. Results of optical absorption and EPR studies pointed out the gradual conversion of chromium ions from Cr3 + state to Cr6 + state with an increase of Cr2O3 content from 0.1 to 0.5 mol%. The results of FTIR, Raman and EPR studies revealed that Cr6 + ions participate in the glass network in tetrahedral positions and seemed to increase the polymerization of the glass ceramics. The quantitative analysis of results of the spectroscopic studies further indicated that the glasses crystallized with low concentration of Cr2O3 are favourable for solid state laser devices.

  15. Effects of sodium and potassium ions on a novel SeO2-B2O3-SiO2-P2O5-CaO bioactive system

    NASA Astrophysics Data System (ADS)

    Trandafir, D. L.; Ponta, O.; Ciceo-Lucacel, R.; Simon, V.

    2015-01-01

    The study is focused on Na2O and/or K2O influence on a new sol-gel derived SeO2-B2O3-SiO2-P2O5-CaO bioactive system. The structural changes induced by Na2O and/or K2O addition were correlated with the samples behavior in simulated biological media. X-ray diffraction (XRD) and Fourier transform infrared (FTIR) spectroscopy were used to characterize the structure and the type of the chemical bonds. The morphology of the samples was characterized through scanning electron microscopy (SEM). XRD results pointed out a prevalent vitreous structure with an incipient hydroxyapatite (HA) crystalline phase. FTIR results revealed a complex network consisting of silicate, phosphate and borate units, as well as the development of both A- and B-type of carbonate-substituted HA. The bioactivity of the samples was tested in vitro following the evolution of the apatite layers self-assembled on the samples surface in simulated body fluid. Their biocompatibility was investigated after samples surface functionalization with protein. The results indicate that sodium and potassium addition improves the biocompatibility by enhancement of protein adherence on samples surface and without to prevent the samples bioactivity.

  16. Effect of pH values on surface modification and solubility of phosphate bioglass-ceramics in the CaO-P 2O 5-Na 2O-SrO-ZnO system

    NASA Astrophysics Data System (ADS)

    Li, Xudong; Cai, Shu; Zhang, Wenjuang; Xu, Guohua; Zhou, Wei

    2009-08-01

    The bioactive glass-ceramics in the CaO-P 2O 5-Na 2O-SrO-ZnO system were synthesized by the sol-gel technique, and then chemically treated at different pH values to study the solubility and surface modification. Samples sintered at 650 °C for 4 h consisted of the crystalline phase ?-Ca 2P 2O 7 and the glass matrix. After soaking in the solution at pH 1.0, the residual glass matrix on the surface appeared entirely dissolved and no new phase could be detected. Whereas at pH 3.0, web-like layer exhibiting peaks corresponding to CaP 2O 6 was formed and covered the entire surface of the sample. When conducted at pH 10.0, only part of the glass matrix was dissolved and a new phase Ca 4P 6O 19 was precipitated, forming the petaline layer. The chemical treatment can easily change the surface morphologies and phase composition of this bioactive glass-ceramics. The higher level of surface roughness resulting from the new-formed layer would improve the interface bonding and benefit for cell adhesion.

  17. Sol-gel synthesis of quaternary (P2O5)55-(CaO)25-(Na2O)(20-x)-(TiO2) x bioresorbable glasses for bone tissue engineering applications (x = 0, 5, 10, or 15).

    PubMed

    Foroutan, Farzad; Walters, Nick J; Owens, Gareth J; Mordan, Nicola J; Kim, Hae-Won; de Leeuw, Nora H; Knowles, Jonathan C

    2015-08-01

    In the present study, we report a new and facile sol-gel synthesis of phosphate-based glasses with the general formula of (P2O5)55-(CaO)25-(Na2O)(20-x)-(TiO2) x , where x = 0, 5, 10 or 15, for bone tissue engineering applications. The sol-gel synthesis method allows greater control over glass morphology at relatively low processing temperature (200 °C) in comparison with phosphate-based melt-derived glasses (~1000 °C). The glasses were analyzed using several characterization techniques, including x-ray diffraction (XRD), (31)P magic angle spinning nuclear magnetic resonance ((31)P MAS-NMR), Fourier transform infrared (FTIR) spectroscopy and energy-dispersive x-ray (EDX) spectroscopy, which confirmed the amorphous and glassy nature of the prepared samples. Degradation was assessed by measuring the ion release and pH change of the storage medium. Cytocompatibility was also confirmed by culturing osteoblast-like osteosarcoma cell line MG-63 on the glass microparticles over a seven-day period. Cell attachment to the particles was imaged using scanning electron microscopy (SEM) and confocal laser scanning microscopy (CLSM). The results revealed the potential of phosphate-based sol-gel derived glasses containing 5 or 10 mol% TiO2, with high surface area, ideal dissolution rate for cell attachment and easily metabolized dissolution products, for bone tissue engineering applications. PMID:26306553

  18. Influence of local structural disorders on spectroscopic properties of multi-component CaF2-Bi2O3-P2O5-B2O3 glass ceramics with Cr2O3 as nucleating agent.

    PubMed

    Suresh, S; Narendrudu, T; Yusub, S; Suneel Kumar, A; Ravi Kumar, V; Veeraiah, N; Krishna Rao, D

    2016-01-15

    Multi-component CaF2-Bi2O3-P2O5-B2O3 glasses doped with different concentrations of Cr2O3 were crystallized through heat treatment. The prepared glass ceramic samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and differential thermal analysis (DTA). Spectroscopic studies viz., optical absorption, Fourier transform infrared (FTIR), Raman and electron paramagnetic resonance (EPR) were carried out. The XRD, SEM and DTA studies indicated that the samples contain different crystalline phases. Results of optical absorption and EPR studies pointed out the gradual conversion of chromium ions from Cr(3+) state to Cr(6+) state with an increase of Cr2O3 content from 0.1 to 0.5mol%. The results of FTIR, Raman and EPR studies revealed that Cr(6+) ions participate in the glass network in tetrahedral positions and seemed to increase the polymerization of the glass ceramics. The quantitative analysis of results of the spectroscopic studies further indicated that the glasses crystallized with low concentration of Cr2O3 are favourable for solid state laser devices. PMID:26318703

  19. Effect of ZrO(2) additions on the crystallization, mechanical and biological properties of MgO-CaO-SiO(2)-P(2)O(5)-CaF(2) bioactive glass-ceramics.

    PubMed

    Li, H C; Wang, D G; Meng, X G; Chen, C Z

    2014-06-01

    A series of ZrO(2) doped MgO-CaO-SiO(2)-P(2)O(5)-CaF(2) bioactive glass-ceramics were obtained by sintering method. The crystallization behavior, phase composition, morphology and structure of glass-ceramics were characterized. The bending strength, elastic modulus, fracture toughness, micro-hardness and thermal expansion coefficient (TEC) of glass-ceramics were investigated. The in vitro bioactivity and cytotoxicity tests were used to evaluate the bioactivity and biocompatibility of glass-ceramics. The sedimentation mechanism and growth process of apatites on sample surface were discussed. The results showed that the mainly crystalline phases of glass-ceramics were Ca(5)(PO4)3F (fluorapatite) and ?-CaSiO(3). (?-wollastonite). m-ZrO(2) (monoclinic zirconia) declined the crystallization temperatures of glasses. t-ZrO(2) (tetragonal zirconia) increased the crystallization temperature of Ca(5)(PO4)(3)F and declined the crystallization temperature of ?-CaSiO(3). t-ZrO(2) greatly increased the fracture toughness, bending strength and micro-hardness of glass-ceramics. The nanometer apatites were induced on the surface of glass-ceramic after soaking 28 days in SBF (simulated body fluid), indicating the glass-ceramic has good bioactivity. The in vitro cytotoxicity test demonstrated the glass-ceramic has no toxicity to cell. PMID:24780435

  20. Magnetic bioactive glass ceramic in the system CaO-P2O5-SiO2-MgO-CaF2-MnO2-Fe2O3 for hyperthermia treatment of bone tumor.

    PubMed

    Li, Guangda; Feng, Shuying; Zhou, Dali

    2011-10-01

    Magnetic bioactive glass ceramic (MG) in the system CaO-SiO(2)-P(2)O(5)-MgO-CaF(2)-MnO(2)-Fe(2)O(3) for hyperthermia treatment of bone tumor was synthesized. The phase composition was investigated by XRD. The magnetic property was measured by VSM. The in vitro bioactivity was investigated by simulated body fluid (SBF) soaking experiment. Cell growth on the surface of the material was evaluated by co-culturing osteoblast-like ROS17/2.8 cells with materials for 7 days. The results showed that MG contained CaSiO(3) and Ca(5)(PO(4))(3)F as the main phases, and MnFe(2)O(4) and Fe(3)O(4) as the magnetic phases. Under a magnetic field of 10,000 Oe, the saturation magnetization and coercive force of MG were 6.4 emu/g and 198 Oe, respectively. After soaking in SBF for 14 days, hydroxyapatite containing CO(3)(2-) was observed on the surface of MG. The experiment of co-culturing cells with material showed that cells could successfully attach and well proliferate on MG. PMID:21870083

  1. Influence of strontium on structure, sintering and biodegradation behaviour of CaO-MgO-SrO-SiO2-P2O5-CaF2 glasses

    SciTech Connect

    Goel, Ashutosh; Rajagopal, Raghu R.; Ferreira, Jose M.

    2011-11-01

    The present study investigates the influence of SrO on structure, apatite forming ability, physico-chemical degradation and sintering behaviour of melt-quenched bioactive glasses with composition: mol.% (36.07 – x) CaO – x SrO - 19.24 MgO – 5.61 P2O5 – 38.49 SiO2 – 0.59 CaF2, where x varies between 0 – 10. The detailed structural analysis of glasses has been made by infra red spectroscopy (FTIR) and magic angle spinning-nuclear magnetic resonance spectroscopy (MAS-NMR). Silicon was predominantly present as Q2 (Si) species while phosphorus was found in orthophosphate type environment in all the investigated glasses. The apatite forming ability of glasses was investigated by immersion of glass powders in simulated body fluid (SBF) for time durations varying between 1 h – 7 days. While increasing Sr2+/Ca2+ ratio in glasses did not affect the structure of glasses significantly, their apatite forming ability was decreased considerably. Further, physico-chemical degradation of glasses has been studied in accordance with ISO 10993-14 “Biological evaluation of medical devices – Part 14: Identification and quantification of degradation products from ceramics” in Tris HCl and citric acid buffer and the possible implications of ion release profile from glasses in different solutions has been discussed. The addition of strontium in glasses led to a 7-fold decrease in chemical degradation of glasses in Tris-HCl. The sintering of glass powders rendered glass-ceramics (GCs) with varying degree of crystallinity and good flexural strength (98-131 MPa) where the mechanical properties depend on the nature and amount of crystalline phases present in GCs.

  2. Optical Properties and Photoactivity of The Pigmentary TiO2 Doped with P2O5, K2O, Al2O3 and Sb2O3

    NASA Astrophysics Data System (ADS)

    Gle?, M.; Grzmil, B.

    2011-05-01

    The influence of the increasing content of antimony calculated to Sb2O3 (0.08-0.57 mol%) with the constant amount of the other additives (calculated to P2O5, K2O, Al2O3) on the optical properties and photostability of doped rutile has been investigated. The properties of the obtained TiO2-PKAlSb samples were compared to the commercial TiO2-PKAl composition. The starting material was the concentrated suspension of technical-grade hydrated titanium dioxide (HTD). The dopant agents' solutions were introduced to HTD. Prepared samples were calcined with gradually increasing process temperature. The XRD analysis was used to determine the rutile content in the TiO2 samples. Optical properties of modified titanium dioxide have been determined spectrophotometrically by measuring the colour in the white (brightness, white tone) and grey system (relative lightening power, grey tone). Photostability was characterized by the white lead-glycerin test with UV-Vis light. It was observed that with the increasing content of antimony in rutile TiO2, doped with phosphates, potassium and aluminium, the brightness and grey tone were increasing but white tone decreased. The changes of the relative lightening power values were insignificant. Comparing the samples of TiO2-PKAlSb with the TiO2-PKAl composition it was observed that titanium dioxide doped with antimony had better white and grey tone. The increasing Sb2O3 content in the TiO2 caused the improvement of the photostability.

  3. Sol-gel synthesis and electrospraying of biodegradable (P2O5)55-(CaO)30-(Na2O)15 glass nanospheres as a transient contrast agent for ultrasound stem cell imaging.

    PubMed

    Foroutan, Farzad; Jokerst, Jesse V; Gambhir, Sanjiv S; Vermesh, Ophir; Kim, Hae-Won; Knowles, Jonathan C

    2015-02-24

    Ultrasound imaging is a powerful tool in medicine because of the millisecond temporal resolution and submillimeter spatial resolution of acoustic imaging. However, the current generation of acoustic contrast agents is primarily limited to vascular targets due to their large size. Nanosize particles have the potential to be used as a contrast agent for ultrasound molecular imaging. Silica-based nanoparticles have shown promise here; however, their slow degradation rate may limit their applications as a contrast agent. Phosphate-based glasses are an attractive alternative with controllable degradation rate and easily metabolized degradation components in the body. In this study, biodegradable P2O5-CaO-Na2O phosphate-based glass nanospheres (PGNs) were synthesized and characterized as contrast agents for ultrasound imaging. The structure of the PGNs was characterized using scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), (31)P magic angle spinning nuclear magnetic resonance ((31)P MAS NMR), and Fourier transform infrared (FTIR) spectroscopy. The SEM images indicated a spherical shape with a diameter size range of 200-500 nm. The XRD, (31)P NMR, and FTIR results revealed the amorphous and glassy nature of PGNs that consisted of mainly Q(1) and Q(2) phosphate units. We used this contrast to label mesenchymal stem cells and determined in vitro and in vivo detection limits of 5 and 9 ?g/mL, respectively. Cell counts down to 4000 could be measured with ultrasound imaging with no cytoxicity at doses needed for imaging. Importantly, ion-release studies confirmed these PGNs biodegrade into aqueous media with degradation products that can be easily metabolized in the body. PMID:25625373

  4. Ionic conductivity of mixed glass former 0.35Na(2)O + 0.65[xB(2)O(3) + (1 - x)P(2)O(5)] glasses.

    PubMed

    Christensen, Randilynn; Olson, Garrett; Martin, Steve W

    2013-12-27

    The mixed glass former effect (MGFE) is defined as a nonlinear and nonadditive change in the ionic conductivity with changing glass former fraction at constant modifier composition between two binary glass forming compositions. In this study, mixed glass former (MGF) sodium borophosphate glasses, 0.35Na2O + 0.65[xB2O3 + (1 - x)P2O5], 0 ? x ? 1, have been prepared, and their sodium ionic conductivity has been studied. The ionic conductivity exhibits a strong, positive MGFE that is caused by a corresponding strongly negative nonlinear, nonadditive change in the conductivity activation energy with changing glass former content, x. We describe a successful model of the MGFE in the conductivity activation energy terms of the underlying short-range order (SRO) phosphate and borate glass former structures present in these glasses. To do this, we have developed a modified Anderson-Stuart (A-S) model to explain the decrease in the activation energy in terms of the atomic level composition dependence (x) of the borate and phosphate SRO structural groups, the Na(+) ion concentration, and the Na(+) mobility. In our revision of the A-S model, we carefully improve the treatment of the cation jump distance and incorporate an effective Madelung constant to account for many body coulomb potential effects. Using our model, we are able to accurately reproduce the composition dependence of the activation energy with a single adjustable parameter, the effective Madelung constant, that changes systematically with composition, x, and varies by no more than 10% from values typical of oxide ceramics. Our model suggests that the decreasing columbic binding energies that govern the concentration of the mobile cations are sufficiently strong in these glasses to overcome the increasing volumetric strain energies (mobility) caused by strongly increasing glass-transition temperatures combined with strongly decreasing molar volumes of these glasses. The dependence of the columbic binding energy term on the relative high-frequency dielectric permittivity suggests that the increased polarizability of the bridging oxygens connecting SRO tetrahedral boron units to phosphorus units causes further charge delocalization away from the negatively charged tetrahedral boron units, leading to a lowering of the charge density, and is the underlying cause of the MGFE. PMID:24295052

  5. Bioactivity and cell proliferation in radiopaque gel-derived CaO-P2O5-SiO2-ZrO2 glass and glass-ceramic powders.

    PubMed

    Montazerian, Maziar; Yekta, Bijan Eftekhari; Marghussian, Vahak Kaspari; Bellani, Caroline Faria; Siqueira, Renato Luiz; Zanotto, Edgar Dutra

    2015-10-01

    In this study, 10 mol% ZrO2 was added to a 27CaO-5P2O5-68SiO2 (mol%) base composition synthesized via a simple sol-gel method. This composition is similar to that of a frequently investigated bioactive gel-glass. The effects of ZrO2 on the in vitro bioactivity and MG-63 cell proliferation of the glass and its derivative polycrystalline (glass-ceramic) powder were investigated. The samples were characterized using thermo-gravimetric and differential thermal analysis (TG/DTA), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM) coupled to energy dispersive X-ray spectroscopy (EDS). Release of Si, Ca, P and Zr into simulated body fluid (SBF) was determined by inductively coupled plasma (ICP). Upon heat treatment at 1000 °C, the glass powder crystallized into an apatite-wollastonite-zirconia glass-ceramic powder. Hydroxycarbonate apatite (HCA) formation on the surface of the glass and glass-ceramic particles containing ZrO2 was confirmed by FTIR and SEM. Addition of ZrO2 to the base glass composition decreased the rate of HCA formation in vitro from one day to three days, and hence, ZrO2 could be employed to control the rate of apatite formation. However, the rate of HCA formation on the glass-ceramic powder containing ZrO2 crystal was equal to that in the base glassy powder. Tests with a cultured human osteoblast-like MG-63 cells revealed that the glass and glass-ceramic materials stimulated cell proliferation, indicating that they are biocompatible and are not cytotoxic in vitro. Moreover, zirconia clearly increased osteoblast proliferation over that of the Zr-free samples. This increase is likely associated with the lower solubility of these samples and, consequently, a smaller variation in the media pH. Despite the low solubility of these materials, bioactivity was maintained, indicating that these glassy and polycrystalline powders are potential candidates for bone graft substitutes and bone cements with the special feature of radiopacity. PMID:26117775

  6. Measurements of defect structures by positron annihilation lifetime spectroscopy of the tellurite glass TeO2-P2O5-ZnO-LiNbO3 doped with ions of rare earth elements: Er3+, Nd3+ and Gd3+

    NASA Astrophysics Data System (ADS)

    Golis, E.; Yousef, El. S.; Reben, M.; Kotynia, K.; Filipecki, J.

    2015-12-01

    The objective of the study was the structural analysis of the TeO2-P2O5-ZnO-LiNbO3 tellurite glasses doped with ions of the rare-earth elements: Er3+, Nd3+ and Gd3+ based on the PALS (Positron Annihilation Lifetime Spectroscopy) method of measuring positron lifetimes. Values of positron lifetimes and the corresponding intensities may be connected with the sizes and number of structural defects, such as vacancies, mono-vacancies, dislocations or pores, the sizes of which range from a few angstroms to a few dozen nanometres. Experimental positron lifetime spectrum revealed existence of two positron lifetime components ?1 and ?2. Their interpretation was based on two-state positron trapping model where the physical parameters are the annihilation velocity and positron trapping rate.

  7. Structural studies of mixed glass former 0.35Na2O + 0.65[xB2O3 + (1 - x)P2O5] glasses by Raman and 11B and 31P magic angle spinning nuclear magnetic resonance spectroscopies.

    PubMed

    Christensen, Randilynn; Olson, Garrett; Martin, Steve W

    2013-02-21

    The mixed glass former (MGF) effect (MGFE) is defined as a nonlinear and nonadditive change in the ionic conductivity with changing glass former composition at constant modifier composition. In this study, sodium borophosphate 0.35Na(2)O + 0.65[xB(2)O(3) + (1 - x)P(2)O(5)], 0 ? x ? 1, glasses which have been shown to exhibit a positive MGFE have been prepared and examined using Raman and (11)B and (31)P magic angle spinning nuclear magnetic resonance (MAS NMR) spectroscopies. Through examination of the short-range order (SRO) structures found in the ternary glasses, it was determined that the minority glass former, B for 0.1 ? x ? 0.7 and P for 0.7 ? x ? 0.9, is "overmodified" and contains more Na(+) ions than would be expected from simple linear mixing of the binary sodium borate, x = 1, and sodium phosphate, x = 0, glasses, respectively. Changes in the intermediate range order (IRO) structures were suggested by changes in the NMR spectral chemical shifts and Raman spectra wavenumber shifts over the full composition range x in the Raman and MAS NMR spectra. The changes observed in the chemical shifts of (31)P MAS NMR spectra with x are found to be too large to be caused solely by changing sodium modification of the phosphate SRO structural groups, and this indicates that internetwork bonding between phosphorus and boron through bridging oxygens (BOs), P-O-B, must be a major contributor to the IRO structure of these glasses. While not fully developed, a first-order thermodynamic analysis based upon the Gibbs free energies of formation of the various SRO structural units in this system has been developed and can be used to account for the preferential formation of tetrahedral boron groups, B(4), by the reaction of B(3) with P(2) groups to form B(4) and P(3) groups, respectively, where the superscript denotes the number of BOs on these units, in these glasses. This preference for B(4) units appears to be a predominate cause of the changing modifier to glass former ratio with composition x in these ternary MGF glasses and appears to be associated with the large negative value of the Gibbs free energy of formation of this group. PMID:23281937

  8. LEY DE BIOSEGURIDAD DE ORGANISMOS GENTICAMENTE MODIFICADOS CMARA DE DIPUTADOS DEL H. CONGRESO DE LA UNIN

    E-print Network

    los posibles riesgos que estas actividades pudieran ocasionar a la salud humana o al medio ambiente y protección de la salud humana, del medio ambiente y la diversidad biológica y de la sanidad animal, vegetal y actividades con organismos genéticamente modificados en la salud humana o en el medio ambiente y la diversidad

  9. Reflexión bioética sobre el uso de organismos genéticamente modificados

    PubMed Central

    Yunta, Eduardo Rodríguez

    2011-01-01

    El presente artículo reflexiona desde los 4 principios de la bioética el uso comercial de organismos genéticamente modificados. Se cuestiona fundamentalmente la falta de transferencia de tecnología entre el mundo desarrollado y en desarrollo y el que el presente sistema de patentamiento de organismos vivos modificados fomenta intereses comerciales y no da debida importancia al desarrollo sostenible de la agricultura y ganadería en los países en desarrollo, donde más se necesita. Se reflexiona sobre la importancia que tiene evaluar los riesgos antes de introducirse en el mercado organismos genéticamente modificados y la necesidad de regulación en los países. PMID:21927675

  10. Transport properties of PbO-P2O5-ZnO-Li2O glass system

    NASA Astrophysics Data System (ADS)

    Lakshmikantha, R.; Rajaramakrishna, R.; Ayachit, N. H.; Anavekar, R. V.

    2012-06-01

    The electrical conductivity of Li+ ion conducting lead zinc phosphate glasses have been carried out both as a function of temperature and frequency in the temperature range 458-510K and over frequencies 40 Hz to 10 MHz. The dc conductivities show Arrhenius behavior and show compositional dependence. The ? decreases with increase in Li2O content. The ac conductivity behavior has been analyzed using Almond-West power law using a single exponent. The exponent 's' obtained from the power law fits is found to have values ranging from 0.74 - 0.80 in these glasses and shows moderate temperature dependence, which is attributed to high degree of modification in the glass network.

  11. DESAFÍOS ÉTICOS DE LA INVESTIGACIÓN CON ANIMALES, MANIPULACIÓN GENÉTICA

    PubMed Central

    Yunta, Eduardo Rodríguez

    2012-01-01

    En la investigación con animales existen cuestionamientos éticos tanto en el uso como modelos de enfermedades humanas y requisito previo para ensayos en humanos como en la introducción de modificaciones genéticas. Algunos de estos cuestionamientos son: no representar exactamente la condición humana como modelos, realizar pruebas de toxicidad con grave daño para los animales, alterar su naturaleza mediante modificaciones genéticas, riesgos de la introducción de organismos genéticamente modificados. El uso de animales en investigación para beneficio humano, impone al ser humano la responsabilidad moral de respetarlo, no haciéndoles sufrir innecesariamente, al estar trabajando con seres vivientes y sentientes. PMID:23338641

  12. ORIGINAL PAPER Novel solgel preparation of (P2O5)0.4(CaO)0.25(Na2O)X

    E-print Network

    Jones, Peter JS

    tissue engineering to improve tissue regeneration has fuelled the need for novel biomaterials having Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan 330­714, Republic of Korea in the body and replaced by bone and tissue cells. In comparison with metallic implants which may exhibit

  13. The recycling of incinerated sewage sludge ash as a raw material for CaO-Al2O3-SiO2-P2O5 glass-ceramic production.

    PubMed

    Zhang, Zhikun; Zhang, Lei; Yin, Yulei; Liang, Xuanye; Li, Aimin

    2015-01-01

    In this paper, the recycling of incinerated sewage sludge ash (ISSA) into glass-ceramic materials by a two-stage sintering cycle of nucleation stage and crystallization stage without any pressure and binder is presented. The parent glasses were subjected to the following nucleation/crystallization temperature and time level: (A) 790°C, 1.0?h/870°C, 1.0-3.0?h; (B) 790°C, 1.0?h/945°C, 1.0-3.0?h and (C) 790°C, 1.0?h/1065°C, 1.0-3.0?h. X-ray power diffraction analysis results revealed that multiple crystalline phases coexisted in the glass-ceramic materials and the crystalline phase compositions were more affected by crystallization temperature than crystallization time. Scanning electron microscopy analysis showed an interlocking microstructure of glass phases and crystals with different sizes and spatial distribution. The glass-ceramics crystallized at 945°C for 2.0?h exhibited optimal properties of density of 2.88±0.08?g/cm3, compression strength of 247±12?MPa, bending strength of 118±14?MPa and water absorption of 0.42±0.04. The leaching concentrations of heavy metals were far lower than the limits required by the regulatory standard of EPA. This paper provides a feasible, low-cost and promising method to produce ISSA-based glass-ceramics and highlights the principal characteristics that must be taken into account to use ISSA correctly in glass-ceramics. PMID:25358410

  14. Diopside (CaO-MgO-2SiO2)-fluorapatite (9CaO-3P2O5-CaF2) glass-ceramics: Potential materials for bone tissue engineering

    SciTech Connect

    Kansal, Ishu; Goel, Ashutosh; Tulyaganov, Dilshat U.; Pascual, Maria J.; Lee, Hye-Young; Kim, Hae-Won; Ferreira, Jose M.

    2011-08-18

    Glass-ceramics in the diopside (CaMgSi2O6) - fluorapatite [Ca5(PO4)3F] system are potential candidates for restorative dental and bone implant materials. In the present study, a series of glasses along diopside - fluorapatite binary system have been prepared with varying diopside/fluorapatite ratios for their potential applications in bone tissue engineering. The glasses were obtained from compositions with fluorapatite contents varying between 0-40 wt.%. The sintering ability and crystallization kinetics of as obtained amorphous glasses have been studied through hot-stage microscopy (HSM) and differential thermal analysis (DTA), respectively while crystalline phase evolution in sintered GCs has been followed by X-ray diffraction (XRD) adjoined with Rietveld-R.I.R. technique and scanning electron microscopy (SEM). Further, biodegradation and apatite forming ability of glass-ceramics were investigated by immersion of glass-ceramic discs in simulated body fluid (SBF) solution while chemical degradation and weight loss of glass-ceramics were studied by immersion in Tris-HCl in accordance with standard ISO 10993-14. The addition of fluorapatite (10-25 wt.%) in diopside glass system significantly enhanced the sintering ability of glass-ceramics and improved their apatite forming ability along with their biodegradation behaviour. Moreover, the in vitro cellular responses to glass-ceramics showed good cell viability and significant stimulation of osteoblastic differentiation, suggesting the possible use of the glass-ceramics for bone regeneration.

  15. Phosphorus Equilibrium Between Liquid Iron and CaO-SiO2-MgO-Al2O3-FeO-P2O5 Slag Part 1: Literature Review, Methodology, and BOF Slags

    NASA Astrophysics Data System (ADS)

    Assis, Andre N.; Tayeb, Mohammed A.; Sridhar, Seetharaman; Fruehan, Richard J.

    2015-10-01

    Although the phosphorus reaction in steelmaking has been extensively studied, it continues to be a relevant topic as low phosphorus iron sources become less available and more expensive, necessitating the need for more accurate predictions of the partitioning of phosphorous as function of slag composition and temperature. The current study revisits some of the relevant literature on the topic and details the methodology and experimental setup used in recent studies on phosphorus equilibrium between liquid iron and slags. New data for BOF-type slags are presented, where equilibrium was approached from both metal and slag sides i.e., phosphorus was transferred from metal to slag and vice versa. It was found that slags with basicities higher than 2.5 and FeO contents around 20 to 25 wt pct can promote extensive dephosphorization, and high L P, ((pct P)/[pct P]), values were observed i.e., greater than 500.

  16. Structural analysis of xSrO-(50-x)CaO-50P2O5 glasses with x=0, 5, or 10mol% for potential use in a local delivery system for osteomyelitis treatment.

    PubMed

    Comeau, P A; Filiaggi, M J

    2016-01-01

    The introduction of ions into a local delivery matrix is one method of managing degradation and subsequent release of the incorporated therapeutic agents. Of interest in this study was whether we could modify the structural nature of calcium polyphosphate (CPP) glass and the subsequent therapeutic potential of this local delivery matrix with inclusion of strontium (Sr). We found that adding 10mol% Sr significantly increased the density and chain length of the glass. There was no significant impact of Sr doping on the subsequent loading of vancomycin into the matrix, or the matrix porosity. The noted differences in structural stability, ion release, and vancomycin release between the un-doped CPP matrices and 10mol% Sr-doped CPP matrices in vitro are likely a result of a decrease in glass disorder upon Sr addition to the glass and preferential retention of Sr over Ca during matrix degradation. This study has provided further evidence that Sr incorporation may serve to both manipulate antibiotic release from the amorphous CPP matrix and provide a potential source of therapeutic ions for enhanced bone regeneration. PMID:26478355

  17. Theoretical Analysis of the Triplet Excited State of the [Pt2(H2P2O5)4]4-Ion and Comparison with Time-Resolved X-ray

    E-print Network

    Coppens, Philip

    Coppens* Contribution from the Department of Chemistry, State UniVersity of New York at Buffalo, Buffalo, New York 14260-3000 Received July 25, 2002 ; E-mail: coppens@acsu.buffalo.edu Abstract: A full a lifetime of 9-10 µs in water and acetonitrile solutions, and a high quantum yield (r ) 0

  18. Entrevista con Sabina Berman

    E-print Network

    Hind, Emily

    2000-04-01

    el arte más estilizado, más lejano a la realidad. Para mí, la comedia es el género más cercano. Lo que implica nada más la distancia de un público que está viendo cuan pequeños somos finalmente. ¿Por qué te interesa trabajar con la historia en... mí me pareció fascinante que él pensara en la democracia con tal intensidad descartando el cincuenta por ciento de la población. Igual que ellos [los revolucionarios]. En México se hizo la revolución para la igualdad, la fraternidad de los...

  19. Nam Con Son Basin

    SciTech Connect

    Tin, N.T.; Ty, N.D.; Hung, L.T.

    1994-07-01

    The Nam Con Son basin is the largest oil and gas bearing basin in Vietnam, and has a number of producing fields. The history of studies in the basin can be divided into four periods: Pre-1975, 1976-1980, 1981-1989, and 1990-present. A number of oil companies have carried out geological and geophysical studies and conducted drilling activities in the basin. These include ONGC, Enterprise Oil, BP, Shell, Petro-Canada, IPL, Lasmo, etc. Pre-Tertiary formations comprise quartz diorites, granodiorites, and metamorphic rocks of Mesozoic age. Cenozoic rocks include those of the Cau Formation (Oligocene and older), Dua Formation (lower Miocene), Thong-Mang Cau Formation (middle Miocene), Nam Con Son Formation (upper Miocene) and Bien Dong Formation (Pliocene-Quaternary). The basement is composed of pre-Cenozoic formations. Three fault systems are evident in the basin: north-south fault system, northeast-southwest fault system, and east-west fault system. Four tectonic zones can also be distinguished: western differentiated zone, northern differentiated zone, Dua-Natuna high zone, and eastern trough zone.

  20. Planificación Neuroquirúrgica con Software Osirix

    PubMed Central

    Jaimovich, Sebastián Gastón; Guevara, Martin; Pampin, Sergio; Jaimovich, Roberto; Gardella, Javier Luis

    2014-01-01

    Introducción: La individualidad anatómica es clave para reducir el trauma quirúrgico y obtener un mejor resultado. Actualmente, el avance en las neuroimágenes ha permitido objetivar esa individualidad anatómica, permitiendo planificar la intervención quirúrgica. Con este objetivo, presentamos nuestra experiencia con el software Osirix. Descripción de la técnica: Se presentan 3 casos ejemplificadores de 40 realizados. Caso 1: Paciente con meningioma de la convexidad parasagital izquierda en área premotora; Caso 2: Paciente con macroadenoma hipofisario, operada previamente por vía transeptoesfenoidal en otra institución con una resección parcial; Caso 3: Paciente con lesiones en pedúnculo cerebeloso medio bilateral. Se realizó la planificación prequirúrgica con el software OsiriX, fusionando y reconstruyendo en 3D las imágenes de TC e IRM, para analizar relaciones anatómicas, medir distancias, coordenadas y trayectorias, entre otras funciones. Discusión: El software OsiriX de acceso libre y gratuito permite al cirujano, mediante la fusión y reconstrucción en 3D de imágenes, analizar la anatomía individual del paciente y planificar de forma rápida, simple, segura y económica cirugías de alta complejidad. En el Caso 1 se pudo analizar las relaciones del tumor con las estructuras adyacentes para minimizar el abordaje. En el Caso 2 permitió comprender la anatomía post-operatoria previa del paciente, para determinar la trayectoria del abordaje transnasal endoscópico y la necesidad de ampliar su exposición, logrando la resección tumoral completa. En el Caso 3 permitió obtener las coordenadas estereotáxicas y trayectoria de una lesión sin representación tomográfica. Conclusión: En casos de no contar con costosos sistemas de neuronavegación o estereotáxia el software OsiriX es una alternativa a la hora de planificar la cirugía, con el objetivo de disminuir el trauma y la morbilidad operatoria. PMID:25165617

  1. Construcciones con regla y compas 1 Introduccion

    E-print Network

    Cortiñas, Guillermo

    Construcciones con regla y comp´as Juan Sabia 1 Introducci´on La idea de esta clase es ver qu´e construcciones geom´etricas pueden hacerse con el uso de una regla no graduada (sin marcas), de un comp´as, de un´angulos con regla y comp´as. La pregunta es qu´e otras construcciones se pueden hacer. Los griegos ya tenan

  2. ConCept Master plan Final report

    E-print Network

    Minnesota, University of

    ConCept Master plan Final report MarCh 2010 VerMillion highlands a researCh, reCreation and Wildli, University of Minnesota #12;#12;ConCept Master plan Final report MarCh 2010 VerMillion highlands a resear Prepared by: Center for Rural Design, University of Minnesota #12;The ConCepT MasTer plan for Ver

  3. Trazando la materia oscura con cúmulos globulares

    NASA Astrophysics Data System (ADS)

    Forte, J. C.

    Se describe la estrategia adoptada para mapear la distribución de materia oscura y bariónica en galaxias elípticas cuyos cúmulos globulares están siendo observados con los telescopios VLT y Gemini. Se ejemplifican los resultados con los datos obtenidos en el cúmulo de Fornax.

  4. DIVERSAS MANERAS DE GENERAR ENERGIA CON

    E-print Network

    Gilbes, Fernando

    DE OLAS #12;PAISES CON MAYOR CAPACIDAD HIDROELECTRICA Country Annual Hydroelectric Energy Production hydroelectric generating system. Three Gorges Dam Gezhouba Dam #12;COSTO PROMEDIO DE PRODUCCION (KWH) #12;U

  5. Sistemas de Decisin Celular con Mltiples Posiciones

    E-print Network

    Enciso, Germán

    Sistemas de Decisión Celular con Múltiples Posiciones Germán podemos hacer mejores mediciones a nivel molecular, la biología celular ha individuales. DECISION CELULAR Uno de los sistemas mas estudiados en

  6. Ependimoma myxopapilar sacro gigante con osteolisis

    PubMed Central

    Ajler, Pablo; Landriel, Federico; Goldschmidt, Ezequiel; Campero, Álvaro; Yampolsky, Claudio

    2014-01-01

    Objetivo: la presentación de un caso de una paciente con un ependimoma sacro con extensa infiltración y destrucción ósea local. Descripción del caso: una mujer de 53 años acudió a la consulta por dolor lumbosacro y alteraciones sensitivas perineales y esfinterianas. La imágenes por Resonancia Magnética (IRM) y la Tomografía Axial Computada (TAC) mostraron una lesión expansiva gigante a nivel S2-S4 con extensa osteólisis e invasión de tejidos adyacentes. Se realizó una exéresis tumoral completa con mejoría del estatus funcional. La anatomía patológica informó ependimoma mixopapilar. Discusión: la extensión de la resección quirúrgica es el mejor predictor de buen pronóstico. El tratamiento radiante se reserva como opción adyuvante para las resecciones incompletas y recidiva tumoral. La quimioterapia sólo debería utilizarse en casos en que la cirugía y la radioterapia estén contraindicadas. Conclusión: Los ependimomas mixopapilares sacros con destrucción ósea y presentación intra y extradural son muy infrecuentes y deben ser tenidos en cuenta entre los diagnósticos diferenciales preoperatorios. Su resección total, siempre que sea posible, es la mejor alternativa terapéutica. PMID:25165615

  7. Opciones de cirugía para mujeres con CDIS o con cáncer de seno

    Cancer.gov

    Contiene información sobre los tipos de cirugía de seno, como la operación para conservar el seno y la mastectomía, y ayuda a las mujeres diagnosticadas con CDIS o con cáncer de seno a decidir cuál cirugía es la más conveniente para ellas.

  8. Con Eduardo Pavlovsky, cinco años después

    E-print Network

    Giella, Miguel Á ngel

    1988-10-01

    . Bartis es uno de los grandes actores argentinos y un director de raro talento, que dirigió Telaraña, en el '85. Además, están Elvira Oneto y Susi Evans. Susi me acompaña en Potestad. En realidad estamos trabajando, investigando textos que yo he... julio: Camaralenta, en inglés por el conjunto de Los Angeles, Pablo, también en inglés, y yo, en castellano, con Postestad. Este es más o menos el panorama, que por otro lado, es lo que quiero hacer. Por eso tengo ese grupo humano con el que trabajo...

  9. Programmazione (scripting) server-side con PHP

    E-print Network

    Goy, Anna

    1 MODULO 1 PARTE 3 Programmazione (scripting) server-side con PHP 3.d Goy - a.a. 2012 di interazione home.html ll h identif.php cancella.php cancellato.php logout.phpacquisti.php Goy - a.a. 2012/2013 Programmazione Web 5 sess_scad.html home.html - login/registrazione utente identif.php

  10. Programmazione (scripting) server-side con PHP

    E-print Network

    Goy, Anna

    1 MODULO 1 PARTE 3 Programmazione (scripting) server-side con PHP 3.a Goy - a.a. 2012 informazioni al client (browser) PHP: l'oggetto HTTP response - I php Web Server browser HTTP request HTTP response p p echo "Hello!"; ?> php print "Ciao!"; ?> echo e print scrivono nel Body dell'oggetto HTTP

  11. Programmazione (scripting) server-side con PHP

    E-print Network

    Goy, Anna

    1 MODULO 1 PARTE 3 Programmazione (scripting) server-side con PHP 3.c Goy - a.a. 2012 server contenuto nel cookie) Goy - a.a. 2012/2013 Programmazione Web 3 PHP: cookie - I E' possibile scrivere e leggere cookie utilizzando PHP Per scrivere un cookie, utilizzo la funzione predefinita

  12. DIVERSAS MANERAS DE GENERAR ENERGIA CON

    E-print Network

    Gilbes, Fernando

    ;PAISES CON MAYOR CAPACIDAD HIDROELECTRICA Country Annual Hydroelectric Energy Production (TW-Rivera #12;The Three Gorges Dam project in Hubei, China, is the world's largest hydroelectric generating system. Three Gorges Dam Gezhouba Dam #12;World Energy Consuption #12;Generacion de Electricidad en U

  13. Bayesianism versus Con rmation Michael Strevens

    E-print Network

    Strevens, Michael

    that allows a piece of evidence to remain relevant to a hypothesis even a er it has had its one-time e ect account of theory con rmation is typically thought to be straightforward: Simple Proposal: A piece for one scientist may decrease it for another. #12;is bare account of the relation between Bayesian

  14. ORNL/CON-224 Energy Division

    E-print Network

    Oak Ridge National Laboratory

    ORNL/CON-224 Energy Division U.S. HEAT PUMP RESEARCH AND DEVELOPMENT PROJECTS 1976-1986 K. H by MARTIN MARIETTA ENERGY SYSTEMS, INC. for the U.S. DEPARTMENT OF ENERGY under contract DE-AC05-840R21400 5.2 Water-Source and Ground-Coupled Systems .......................... 37 5.3 Solar-Assisted Systems

  15. InterCon Travel Health: Case B

    ERIC Educational Resources Information Center

    Truman, Gregory E.; Pachamanova, Dessislava A.; Goldstein, Michael A.

    2010-01-01

    InterCon provides services to health insurers of foreign tourists who travel to the United States and Canada. Management wants to implement a new information system that will deal with several operational problems, but it is having difficulty securing the capital resources to fund the system's development. After an initial failure, the chief…

  16. Programmazione (scripting) server-side con PHP

    E-print Network

    Goy, Anna

    /2013 Programmazione Web 1 3.b Interazione con un database (MySQL Server) Ripasso di database - I L'utilizzo di un) User Interface Goy - a.a. 2012/2013 Programmazione Web 4 database mysql_connect("localhost","root",""); mysql_select_db("bacheca"); $sql="SELECT * FROM ut WHERE co='Rossi'"; $ris = mysql

  17. Con Edison Commercial and Industrial Energy Efficiency Program 

    E-print Network

    Pospisil, D.

    2011-01-01

    -metering ? PlaNYC - Green House Gas Emissions 4 5 Customer Eligibility ? Con Edison directly metered Commercial or Industrial customer in an existing building who pays the applicable gas or electric System Benefits Charge The Program Team ? Con Edison C...

  18. 9 CFR 319.301 - Chili con carne with beans.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ...PRODUCTS INSPECTION AND VOLUNTARY INSPECTION AND CERTIFICATION DEFINITIONS AND STANDARDS OF IDENTITY OR COMPOSITION Canned, Frozen, or Dehydrated Meat Food Products § 319.301 Chili con carne with beans. Chili con carne with beans...

  19. 9 CFR 319.301 - Chili con carne with beans.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 9 Animals and Animal Products 2 2011-01-01 2011-01-01 false Chili con carne with beans. 319.301 Section 319.301 Animals and Animal Products FOOD SAFETY AND INSPECTION SERVICE, DEPARTMENT OF AGRICULTURE... Dehydrated Meat Food Products § 319.301 Chili con carne with beans. Chili con carne with beans shall...

  20. 9 CFR 319.301 - Chili con carne with beans.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 9 Animals and Animal Products 2 2010-01-01 2010-01-01 false Chili con carne with beans. 319.301 Section 319.301 Animals and Animal Products FOOD SAFETY AND INSPECTION SERVICE, DEPARTMENT OF AGRICULTURE... Dehydrated Meat Food Products § 319.301 Chili con carne with beans. Chili con carne with beans shall...

  1. 9 CFR 319.301 - Chili con carne with beans.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 9 Animals and Animal Products 2 2013-01-01 2013-01-01 false Chili con carne with beans. 319.301 Section 319.301 Animals and Animal Products FOOD SAFETY AND INSPECTION SERVICE, DEPARTMENT OF AGRICULTURE... Dehydrated Meat Food Products § 319.301 Chili con carne with beans. Chili con carne with beans shall...

  2. 9 CFR 319.301 - Chili con carne with beans.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 9 Animals and Animal Products 2 2014-01-01 2014-01-01 false Chili con carne with beans. 319.301 Section 319.301 Animals and Animal Products FOOD SAFETY AND INSPECTION SERVICE, DEPARTMENT OF AGRICULTURE... Dehydrated Meat Food Products § 319.301 Chili con carne with beans. Chili con carne with beans shall...

  3. 9 CFR 319.301 - Chili con carne with beans.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 9 Animals and Animal Products 2 2012-01-01 2012-01-01 false Chili con carne with beans. 319.301 Section 319.301 Animals and Animal Products FOOD SAFETY AND INSPECTION SERVICE, DEPARTMENT OF AGRICULTURE... Dehydrated Meat Food Products § 319.301 Chili con carne with beans. Chili con carne with beans shall...

  4. MODELOS, MEDICIONES Y TARIFICACION PARA REDES CON CALIDAD DE SERVICIO

    E-print Network

    MODELOS, MEDICIONES Y TARIFICACI´ON PARA REDES CON CALIDAD DE SERVICIO Autor: Pablo Belzarena el Departamento de Telecomunicaciones postergando sus actividades personales. A todos con los que he redes con calidad de servicio . . . . . . . . . . . . . . . . . . . 6 1.2. Las contribuciones de la

  5. Energy Star program benefits Con Edison

    SciTech Connect

    1995-05-01

    Impressed with savings in energy costs achieved after upgrading the lighting and air conditioning systems at its Manhattan headquarters, Home Box Office (HBO) wanted to do more, James Flock, vice president for computer and office systems, contacted Con Edison Co. of New York in March 1991 to determine what the company could do to save money by reducing energy consumed by personal computers. Arthur Kressner, Con Edison Research and Development manager contacted industry organizations and manufacturers for advice, but was told only to shut off computers at night and on weekends. Kressner arranged a series of meetings with IBM and the Electric Power Research Institute (EPRI) to discuss the issue, then approached the U.S. Environmental Protection Agency (EPA), which was designing a program to promote the introduction and use of energy-efficient office equipment. In 1992, the EPA announced the Energy Star program for PCs, enabling manufacturers to display the Energy Star logo on machines meeting program criteria, including the ability to enter a sleep mode in which neither the computer nor monitor consume more than 30 W or electricity. Industry experts estimate national energy consumption by office equipment could double by the year 2000, but Energy Star equipment is expected to improve efficiency and help maintain electric loads.

  6. "Neuronavegacin con un modelo de correccin a tiempo real con ecografa intraoperatoria"

    E-print Network

    Payan, Yohan

    verde) de la herramienta que esta ocupando el cirujano, sobre-puesta sobre los tres cortes (axial orientación de las herramientas del neurocirujano durante un procedimiento. Según una planificación precisión, presentando la posición real de la herramienta usada con respecto a un sistema de referencia. La

  7. Cervical disc arthroplasty: Pros and cons

    PubMed Central

    Moatz, Bradley; Tortolani, P. Justin

    2012-01-01

    Background: Cervical disc arthroplasty has emerged as a promising potential alternative to anterior cervical discectomy and fusion (ACDF) in appropriately selected patients. Despite a history of excellent outcomes after ACDF, the question as to whether a fusion leads to adjacent segment degeneration remains unanswered. Numerous US investigational device exemption trials comparing cervical arthroplasty to fusion have been conducted to answer this question. Methods: This study reviews the current research regarding cervical athroplasty, and emphasizes both the pros and cons of arthroplasty as compared with ACDF. Results: Early clinical outcomes show that cervical arthroplasty is as effective as the standard ACDF. However, this new technology is also associated with an expanding list of novel complications. Conclusion: Although there is no definitive evidence that cervical disc replacement reduces the incidence of adjacent segment degeneration, it does show other advantages; for example, faster return to work, and reduced need for postoperative bracing. PMID:22905327

  8. ProCon - PROteomics CONversion tool.

    PubMed

    Mayer, Gerhard; Stephan, Christian; Meyer, Helmut E; Kohl, Michael; Marcus, Katrin; Eisenacher, Martin

    2015-11-01

    With the growing amount of experimental data produced in proteomics experiments and the requirements/recommendations of journals in the proteomics field to publicly make available data described in papers, a need for long-term storage of proteomics data in public repositories arises. For such an upload one needs proteomics data in a standardized format. Therefore, it is desirable, that the proprietary vendor's software will integrate in the future such an export functionality using the standard formats for proteomics results defined by the HUPO-PSI group. Currently not all search engines and analysis tools support these standard formats. In the meantime there is a need to provide user-friendly free-to-use conversion tools that can convert the data into such standard formats in order to support wet-lab scientists in creating proteomics data files ready for upload into the public repositories. ProCon is such a conversion tool written in Java for conversion of proteomics identification data into standard formats mzIdentML and Pride XML. It allows the conversion of Sequest™/Comet .out files, of search results from the popular and often used ProteomeDiscoverer® 1.x (x=versions 1.1 to1.4) software and search results stored in the LIMS systems ProteinScape® 1.3 and 2.1 into mzIdentML and PRIDE XML. This article is part of a Special Issue entitled: Computational Proteomics. PMID:26182917

  9. A ConA-like lectin from Dioclea guianensis Benth. has antifungal activity against Colletotrichum gloeosporioides, unlike its homologues, ConM and ConA.

    PubMed

    Araújo-Filho, José H; Vasconcelos, Ilka M; Martins-Miranda, Aparecida S; Gondim, Darcy M F; Oliveira, José T A

    2010-04-14

    This study reports on the antifungal activity of Dgui, a ConA-like lectin from Dioclea guianensis seeds. Dgui inhibited conidial germination but not mycelial growth of Colletotrichum gloeosporioides. The lectins ConA and ConM from Canavalia ensiformis and Canavalia maritima, respectively, share high levels of amino acid sequence similarity (>84%) with Dgui and have the same specificity toward glucose/mannose but had no effect on the fungus. Fluorescence microscopy showed that both Dgui and ConM bind to C. gloeosporioides ungerminated conidia. However, Dgui did not bind to C. gloeosporioides germinated conidia and germ tubes and was not inhibitory to mycelial growth. Because only Dgui inhibited germination of the fungus, C. gloeosporioides conidia might have surface-specific germination targets recognized by Dgui but not by its homologues, ConM and ConA. Therefore, Dgui is a candidate for biotechnological approaches for improving the resistance of various nutritionally and commercially important crops that are affected by C. gloeosporioides. PMID:20201549

  10. October 6, 1997 ITER L-Mode Con nement Database

    E-print Network

    October 6, 1997 ITER L-Mode Con nement Database S.M. Kaye and the ITER Con nement Database Working Group Abstract This paper describes the content of an L-mode database that has been compiled with data, and Tore-Supra. The database consists of a total of 2938 entries, 1881 of which are in the L-phase while

  11. Clave de determinacin de los Heliconiinae con rayas anaranjadas

    E-print Network

    Joron, Mathieu

    : mathieu.joron@ed.ac.uk 1. a. Abdomen con puntos amarillos y gruesos en los costados (intrasegmentales..............................................................................2 2. a. Abdomen con anillos intersegmentales amarillos........................Heliconius xanthocles relativamente pequeña, abdomen no muy largo. Ciertas razas no tienen color anaranjado en la cara dorsal

  12. Control del dolor: Apoyo para las personas con cáncer

    Cancer.gov

    Contiene información sobre las medicinas contra el dolor para pacientes con cáncer, los planes para controlarlo, cómo hablar con su equipo de atención médica sobre el dolor que usted siente y qué hacer para controlar los efectos físicos y emocionales del

  13. Breath Analysis Science at PittCon 2012, Orlando, Florida

    EPA Science Inventory

    Breath analysis science was featured in three organized sessions at this year’s Pittsburgh Conference and Exposition, or ‘PittCon 2012’ (http://www.pittcon.org/). As described in previous meeting reports, PittCon is one of the largest international conferences for analytical chem...

  14. Directrices instan al ejercicio a pacientes con cáncer y supervivientes

    Cancer.gov

    Los beneficios del ejercicio están bien documentados en relación con varios tipos de cáncer. Una panel de expertos en cáncer, acondicionamiento físico, obesidad y entrenamiento físico, convocados por el Colegio Americano de Medicina Deportiva, está pasando la voz sobre uno de los más importantes mensajes para los pacientes con cáncer y los supervivientes: hay que evitar la inactividad física.

  15. Making Data Structures Con uently Persistent Amos Fiat Haim Kaplan

    E-print Network

    Fiat, Amos

    Making Data Structures Con uently Persistent Amos Fiat #3; Haim Kaplan #3; Reality is merely for implementing con uently persistent data structures at all. Our meth- ods give an exponential reduction in space methods to make pointer-based data structures partially or fully per- sistent. These methods support

  16. RoboCon: A general purpose telerobotic control center

    SciTech Connect

    Draper, J.V.; Noakes, M.W.; Schempf, H.; Blair, L.M.

    1997-02-01

    This report describes human factors issues involved in the design of RoboCon, a multi-purpose control center for use in US Department of Energy remote handling applications. RoboCon is intended to be a flexible, modular control center capable of supporting a wide variety of robotic devices.

  17. GLOSARIO DE TRMINOS RELACIONADOS CON LA TRANSVERSALIDAD DE GNERO

    E-print Network

    Fernández Pascual, Ricardo

    GLOSARIO DE TÉRMINOS RELACIONADOS CON LA TRANSVERSALIDAD DE GÉNERO PROYECTO EQUAL "EN CLAVE DE palabras y expresiones que más usualmente se utilizan en la práctica diaria del Enfoque Integrado de Género de igualdad con el colectivo favorecido o alcanzar la equiparación de inmediato. También son llamadas

  18. Cálculos ab initio con correlación electrónica

    NASA Astrophysics Data System (ADS)

    Merchán Bonete, M.

    Estamos entrando en una era donde la ortogonalidad entre las investigaciones de carácter experimental y de naturaleza teórica se irá difuminando progresivamente y la problemática a resolver quedará en escena como el único actor principal de la obra. Como premisa para una cooperación teórico-experimental de igual a igual, la metodología químico-cuántica utilizada debe ser capaz de ofrecer resultados de carácter predictivo. Sin duda, esta madurez en la metodología químico-cuántica ya la hemos alcanzado hace algunos años, tal y como muestra entre otras muchas, la labor que nuestro grupo ha realizado en el transcurso de la última década, dentro del campo de la Espectroscopía Teórica. Los estudios realizados comprenden una amplia gama de sistemas, variando tanto en tamaño como en complejidad, abordando problemáticas espectroscópicas consideradas tradicionalmente como especialmente controvertidas. Nuestra contribución científica más relevante reside en el carácter cuantitativo de las asignaciones espectroscópicas que hemos propuesto en base a resultados ab initio. Recordemos que en los años noventa los resultados ab initio solían presentar para las energías de excitación de sistemas de tamaño molecular moderado, como el benceno, errores de más de 1 eV. En comparación con el éxito relativo de los métodos semiempíricos, la frustración de la metodología ab initio quedaba todavía más patente. Los estudios que hemos presentado representan una comprensión profunda de los espectros electrónicos en sistemas orgánicos claves, mostrando el camino a seguir para obtener asignaciones espectroscópicas precisas (entre 0.1-0.2 eV). La naturaleza del método CASPT2 junto al diseño de estrategias computacionales nos ha permitido alcanzar el carácter cuantitativo con el que se caracterizan nuestras contribuciones[1,2]. Por todo ello, algunos de los trabajos publicados se consideran clásicos dentro del campo, pues en cierto modo definen el campo, y se reflejan en libros publicados recientemente. En la conferencia se analizarán ciertos pormenores de las investigaciones realizadas. El tipo de aplicaciones llevadas a cabo hasta la fecha se ilustrará mediante el estudio teórico del espectro electrónico de ciclooctatetraeno. Dando un paso más en la evolución de nuestra investigación, pretendemos en la actualidad describir, desde un formalismo teórico y al mismo nivel de exigencia, los mecanismos subyacentes que tienen lugar en las reacciones biológicas fototoinducidas, es decir, reacciones que se inician mediante la absorción de luz[3]. Como muestra de la caracterización de los procesos fotofísicos y fotoquímicos en fotobiología teórica, hemos elegido la descripción de la conversión interna ultrarrápida que tiene lugar en los cromóforos del ADN. Los estados excitados de las moléculas de los ácidos nucleicos presentan tiempos de vida media que se encuentran en el rango de sub-picosegundos, sugiriendo la presencia de un canal ultrarrápido de conversión interna, lo que normalmente se asocia en la fotoquímica contemporánea a una intersección cónica entre el estado excitado y el fundamental[4]. De esta forma nuestro ADN previene de forma eficaz posibles reacciones en el estado excitado y se revela como un excelente protector solar.

  19. Updated F.15 for CON students registering for Spring, 2016 Advising Notes Construction Engineering (CON) General Construction Concentration

    E-print Network

    Frey, H. Christopher

    Updated F.15 for CON students registering for Spring, 2016 Advising Notes ­ Construction Engineering (CON) ­ General Construction Concentration 1 Note: If you have an advisee that is a CONm the COA office; the following notes are only for CONg (General Construction Concentration) students. 1

  20. Jóvenes con cáncer y supervivientes participan en estudio de oncofertilidad

    Cancer.gov

    Artículo sobre los esfuerzos que se realizan para conectar con pacientes jóvenes y lograr su participación en estudios clínicos para evaluar y remediar la esterilidad causada por el cáncer y su tratamiento.

  1. Nuevas Iniciativas con los SIG en el Municipio de

    E-print Network

    Gilbes, Fernando

    parcelario #12;Mapa resultante de Calificación de Suelos #12;Se creó un CD con los mapas en formato PDF para) Número de Catastro de la parcela Calificación de suelos (zonificación) Par de Coordenadas X,Y en metros

  2. Control del dolor: Apoyo para las personas con cáncer

    Cancer.gov

    Libro sobre el control del dolor en pacientes con cáncer. Cubre los métodos y medicinas, así como los efectos físicos y emocionales del dolor. Es una adaptación cultural para el público de habla hispana del libro en inglés Pain Control.

  3. Estudio de dos ecuaciones parabolicas lineales con metodos de energia

    E-print Network

    Granero, Rafael

    Estudio de dos ecuaciones parab´olicas lineales con m´etodos de energ´ia: Notas para la I Semana energ´ia. Daremos un ap´endice con los resultados m´as ´utiles en este tipo de c´alculos. Palabras clave: M´etodo de la energ´ia, ecuaci´on del calor, ecuaciones no-locales, interfase. ´Indice 1. Introducci

  4. Ricerca di nuova fisica in eventi con bosone di Higgs e top quark singolo con l'esperimento CMS

    E-print Network

    Roma "La Sapienza", Università di

    top singolo reali . . . 42 #12;viii Indice 4.2.2 Il sotto-processo relativo allo stato finale con un bosone di Higgs, un quark top singolo ed un altro quark reali . . . . . . 47 4.3 Confronto tra Modello

  5. Estudio muestra reducción de mortalidad en hombres con cáncer de próstata de grado intermedio

    Cancer.gov

    Terapia hormonal por corto tiempo administrada en combinación con radioterapia a hombres con cáncer de próstata en estadio inicial aumentó sus posibilidades de vivir más en comparación con tratamiento de radioterapia sola, según un estudio clínico patroci

  6. Blond Blintz Bulletin Special Zebra-Con Edition 1 

    E-print Network

    Multiple Contributors

    1979-01-01

    : irement for adjusting present practices. .-L rmation of this kind helps individual farm -5htors appraise the risks and possible con- $26 lences of alternative adjustments. It is basic a - rm? to the formulation of policies and to the 2s itution... of differences in the amount of water applied and in minor cultural practices. Water-use practices and investment in irriga- tion equipment and facilities are changing as farmers cope with the problem of supplying drouth-increased water demands from a con...

  7. Enhanced ballistic performance of conned multi-layered ceramic targets against long rod penetrators through

    E-print Network

    Espinosa, Horacio D.

    Enhanced ballistic performance of con®ned multi-layered ceramic targets against long rod 1998; in revised form 2 July 1999 Abstract Impact recovery experiments on con®ned multi-layered ceramic and two types of ceramics, viz., Alumina and TiB2. The combined material-structural response is examined

  8. BANDO PER IL RECLUTAMENTO DI UN RICERCATORE CON RAPPORTO DI LAVORO A TEMPO DETERMINATO TIPOLOGIA A

    E-print Network

    Di Pillo, Gianni

    BANDO PER IL RECLUTAMENTO DI UN RICERCATORE CON RAPPORTO DI LAVORO A TEMPO DETERMINATO TIPOLOGIA di Ateneo per il reclutamento di Ricercatori con contratto a tempo determinato in vigore, emanato con Fisiologia e Farmacologia "Vittorio Erspamer" di n. 1 posto di ricercatore con rapporto di lavoro a tempo

  9. Cómo hacer las gestiones con su plan de salud

    Cancer.gov

    Hay formas de saber si su plan de salud cubre los costos de atención médica de rutina durante un estudio clínico. Esta información puede servirle para saber con quién comunicarse para solicitar ayuda, preguntas que puede hacer y la información que debe recoger y guardar si decide participar en un estudio clínico.

  10. The evolution of female mate choice by sexual con ict

    E-print Network

    Gavrilets, Sergey

    The evolution of female mate choice by sexual con ict Sergey Gavrilets1* , Go« ran Arnqvist2 sexual selection by female mate choice, our understanding of the adaptive value of female mating females evolving resistance rather than attraction to males, but this has been disputed. Here, we develop

  11. -okfl ^ ORNL/CON-172 Linear Harmonic Analysis of Free-

    E-print Network

    Oak Ridge National Laboratory

    Stirling Engines N. C. J. Chen F. P. Griffin OPERATED BY MARTIN MARIETTA ENERGY SYSTEMS, INC. #12;ORNL/CON-172 Engineering Technology Division* LINEAR HARMONIC ANALYSIS OF FREE-PISTON STIRLING/dynamic problem that is associated with a free-piston Stirling engine (FPSE). The governing equations

  12. Introduction In the oceanic environment, primary production is con-

    E-print Network

    Hansell, Dennis

    metals such as iron (Martin and Fitzwater 1988). Among all the nutrients, nitrate and phosphate319 Introduction In the oceanic environment, primary production is con- trolled by major nutrient are the two best studied compounds in the ocean. Nitrate is often thought as a proximate limiting nutrient

  13. Asociación de XMRV con enfermedades humanas se debe a contaminación

    Cancer.gov

    Nuevas investigaciones muestran que una asociación, mencionada en numerosos estudios, entre el retrovirus conocido como XMRV y el cáncer de próstata así como el síndrome de fatiga crónica, se debe a contaminación de laboratorio con un virus que se originó en ratones.

  14. Detail of conning tower atop the submarine. Note the wire ...

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

    Detail of conning tower atop the submarine. Note the wire rope wrapped around the base of the tower, which may have been used in an attempt to pull the submarine offshore. - Sub Marine Explorer, Located along the beach of Isla San Telmo, Pearl Islands, Isla San Telmo, Former Panama Canal Zone, CZ

  15. Emergency Factsheet for Tratando Agua Almacenada con Cloro

    E-print Network

    Emergency Factsheet for Tratando Agua Almacenada con Cloro Monty C. Dozier, Profesor Asistente y Fertilidad de Suelos El Sistema Universitario Texas A&M Al tratamiento del agua potable para mejorar su sanidad o calidad bacteriológica sele refiere como desinfección. La cloraciónpor choque (o cloración por

  16. DesignCon 2005 Design of a Low-Power

    E-print Network

    LaMeres, Brock J.

    repeaters. By including charge recycling, the power can be reduced by 43%, which includes the power consumedDesignCon 2005 Design of a Low-Power Differential Repeater Using Low Voltage and Charge Recycling using low-voltage swing and charge recycling. The low-voltage design is shown to reduce the overall

  17. Analisis de opiniones con ontologias Opinion mining with ontologies

    E-print Network

    Mascardi, Viviana

    que con ella se tendr´an m´as bases sustentables para poder decidir cu´ales son los pasos a seguir y poder dar sus opiniones, positivas o negativas sobre cualquier producto o servicio. Las principales los medios de comunicaci´on sociales, para obtener la informaci´on adecuada para modificar sus

  18. A vueltas con el infinito Miguel Martin (Universidad de Granada)

    E-print Network

    Martín, Miguel

    llevado varios milenios y muchas picaduras poder meter mano ah´i. Antonio J. Dur´an (1962­) #12 americanismos del Diccionario? ¿Con qué medios informáticos se revisa el Diccionario? Cifras de actualización LA

  19. Precisión de las velocidades radiales obtenidas con el REOSC

    NASA Astrophysics Data System (ADS)

    González, J. F.; Lapasset, E.

    Complementando una línea de trabajo iniciada con anterioridad discutimos la estabilidad del espectrógrafo REOSC de CASLEO en DC para la medición de velocidades radiales en base al análisis de observaciones realizadas en enero y abril de 1997. En esas oportunidades obtuvimos 26 espectros de estrellas patrones y 27 espectros de 3 estrellas usadas como estrellas de referencia en nuestro programa de cúmulos abiertos. Además tomamos 26 espectros de crepúsculo con el telescopio en posiciones cubriendo el rango H=-4,+4 y ? =-90,+30. Mediante correlaciones cruzadas derivamos la velocidad de 19 órdenes en cada uno de estos espectros. En base a un análisis estadístico de los datos obtenidos discutimos la contribución de los distintos factores que afectan a la dispersión de lectura observada. En particular, la flexión del instrumento no introduciría errores significativos cuando se observa con masas de aire menores que 2.0. La dispersión de los valores de velocidad medidos para espectros de alta relación S/N de una misma estrella resultó del orden de 0.5 km/s. La comparación con los valores de velocidad publicados por distintos autores para las estrellas patrones no permite distinguir ninguna diferencia sistemática apreciable de las velocidades de CASLEO, siendo la media cuadrática de los residuos del orden de 1.0 km/s.

  20. Quantum computing: pro and con BY JOHN PRESKILL

    E-print Network

    Preskill, John

    Quantum computing: pro and con BY JOHN PRESKILL Charles C. Lauritsen Laboratory of High Energy computation. Broad and important applications must be found to justify construction of a quantum computer; I-tolerant procedures that enable a quantum computer with noisy gates to perform reliably. Quantum computing hardware

  1. LunGradCon: The Lunar Graduate Conference

    NASA Astrophysics Data System (ADS)

    Dove, A.; Poppe, A.; Neish, C.; Fagan, A.; Fuqua, H.; Kramer, G. Y.; Horanyi, M.

    2011-12-01

    Members of the Colorado Center for Lunar Dust and Atmospheric Studies (CCLDAS) initiated the Lunar Graduate Conference (LunGradCon), modeled after the highly successful Astrobiology Graduate Conference (AbGradCon). The purpose of this conference is to enhance the professional development of graduate students and early postdoctoral researchers by providing an opportunity to present and discuss scientific research in an environment of their peers. For the first two years, LunGradCon has been held as a one-day conference in conjunction with the NASA Lunar Science Institue's (NLSI) Lunar Science Forum at the NASA Ames Research Center. Activities include an invited overview talk on each of the NASA Lunar Science Institute's three main research areas (OF the Moon, ON the Moon, and FROM the Moon), submitted oral presentations from graduate students and postdoctoral researchers, and networking opportunities with established member of the lunar science community and the NLSI. In each of the first two years of LunGradCon, there have been 20-25 attendees, with about 15 of those presenting submitted talks. Each speaker received feedback forms from the other participants in order to improve on their presentation techniques. Participants also provided feedback on the conference as a whole in order to evaluate the content and provide suggestions for improvement in following years. Overall, the feedback has been extremely positive. This talk will summarize the achievements of past LunGradCons and plans for expansion of the conference to ensure a long-term positive impact on the early careers of future lunar, planetary and space science researchers.

  2. ConStrains identifies microbial strains in metagenomic datasets.

    PubMed

    Luo, Chengwei; Knight, Rob; Siljander, Heli; Knip, Mikael; Xavier, Ramnik J; Gevers, Dirk

    2015-10-01

    An important fraction of microbial diversity is harbored in strain individuality, so identification of conspecific bacterial strains is imperative for improved understanding of microbial community functions. Limitations in bioinformatics and sequencing technologies have to date precluded strain identification owing to difficulties in phasing short reads to faithfully recover the original strain-level genotypes, which have highly similar sequences. We present ConStrains, an open-source algorithm that identifies conspecific strains from metagenomic sequence data and reconstructs the phylogeny of these strains in microbial communities. The algorithm uses single-nucleotide polymorphism (SNP) patterns in a set of universal genes to infer within-species structures that represent strains. Applying ConStrains to simulated and host-derived datasets provides insights into microbial community dynamics. PMID:26344404

  3. La interacción de estrellas WN con el medio circundante

    NASA Astrophysics Data System (ADS)

    Arnal, M.; Cappa, C.; Rizzo, J. R.; Cichovolski, S.

    Se presentan resultados preliminares de un estudio de la distribución del hidrógeno neutro en los alrededores de estrellas WR de la serie del nitrógeno. Los datos observacionales de la línea de 21 cm provienen de un relevamineto de baja resolución angular (36'), así como de observaciones de resolución angular intermedia (9') tomadas con el radiotelescopio de Effelsberg. Este análisis ha permitido detectar cavidades y envolturas de H I en expansión vinculadas a las estrellas que componen la muestra.

  4. Orbit and spin resolved magnetic properties of size selected [ConRh](+) and [ConAu](+) nanoalloy clusters.

    PubMed

    Dieleman, Dennis; Tombers, Matthias; Peters, Lars; Meyer, Jennifer; Peredkov, Sergey; Jalink, Jeroen; Neeb, Matthias; Eberhardt, Wolfgang; Rasing, Theo; Niedner-Schatteburg, Gereon; Kirilyuk, Andrei

    2015-11-14

    Bi-metallic nanoalloys of mixed 3d-4d or 3d-5d elements are promising candidates for technological applications. The large magnetic moment of the 3d materials in combination with a high spin-orbit coupling of the 4d or 5d materials give rise to a material with a large magnetic moment and a strong magnetic anisotropy, making them ideally suitable in for example magnetic storage devices. Especially for clusters, which already have a higher magnetic moment compared to the bulk, these alloys can profit from the cooperative role of alloying and size reduction in order to obtain magnetically stable materials with a large magnetic moment. Here, the influence of doping of small cobalt clusters on the spin and orbital magnetic moment has been studied for the cations [Co8-14Au](+) and [Co10-14Rh](+). Compared to the undoped pure cobalt [CoN](+) clusters we find a significant increase in the spin moment for specific CoN-1Au(+) clusters and a very strong increase in the orbital moment for some CoN-1Rh(+) clusters, with more than doubling for Co12Rh(+). This result shows that substitutional doping of a 3d metal with even just one atom of a 4d or 5d metal can lead to dramatic changes in both spin and orbital moment, opening up the route to novel applications. PMID:26104269

  5. IZ-CON: an intelligent zone controller for building systems operation 

    E-print Network

    Mahdavi, A.; Schub, M.

    2012-01-01

    This paper describes the concept of an intelligent zone controller (IZ-CON) for integrated operation of building systems. IZ-CON is intended to deploy a predictive control methodology with embedded simulation capability. Thereby, the scalability...

  6. Aspectos relacionados con la sexualidad y la reproducción (PDQ)—Versión para profesionales de salud

    Cancer.gov

    Resumen de información revisada por expertos acerca de los factores que pueden afectar el funcionamiento sexual de las personas con cáncer. Se discuten además temas sobre la fecundidad relacionados con el tratamiento del cáncer.

  7. Aspectos relacionados con la sexualidad y la reproducción (PDQ)—Versión para pacientes

    Cancer.gov

    Resumen de información revisada por expertos acerca de los factores que podrían afectar el funcionamiento sexual de las personas con cáncer. Se discuten además temás sobre la fertilidad relacionados con el tratamiento del cáncer.

  8. Añadir quimioterapia después de la radioterapia mejora la supervivencia de adultos con un tipo de tu

    Cancer.gov

    Adultos con gliomas de grado bajo, una forma de tumor cerebral, que recibieron tratamiento con quimioterapia después de la radioterapia vivieron más tiempo que pacientes que recibieron solo radioterapia, según los resultados de seguimiento a largo plazo d

  9. Crystal structure of a lectin from Canavalia maritima (ConM) in complex with trehalose and maltose reveals relevant mutation in ConA-like lectins.

    PubMed

    Delatorre, Plínio; Rocha, Bruno A M; Gadelha, Carlos A A; Santi-Gadelha, Tatiane; Cajazeiras, João B; Souza, Emmanuel P; Nascimento, Kyria S; Freire, Valder N; Sampaio, Alexandre H; Azevedo, Walter F; Cavada, Benildo S

    2006-06-01

    The crystal structure of Canavalia maritima lectin (ConM) complexed with trehalose and maltose revealed relevant point mutations in ConA-like lectins. ConM with the disaccharides and other ConA-like lectins complexed with carbohydrates demonstrated significant differences in the position of H-bonds. The main difference in the ConM structure is the replacement of Pro202 by Ser202, a residue that promotes the approximation of Tyr12 to the carbohydrate-binding site. The O-6' of the second glucose ring in maltose interacts with Tyr12, while in trehalose the interaction is established by the O-2' and Tyr12, explaining the higher affinity of ConM for disaccharides compared to monosaccharides. PMID:16677825

  10. Where's the Beef? ConAgra's Approach to Energy Sources & Efficiency in Meat Processing 

    E-print Network

    Kananen, T. M.

    2001-01-01

    ConAgra Foods, Inc. is a diversified international food company. ConAgra operating companies work interdependently across the food chain with 82,000 employees in 35 countries around the world. Sustainable development is a vital ConAgra business...

  11. NetKuang A Multi-Host Con guration Vulnerability Checker

    E-print Network

    Yoo, S. J. Ben

    NetKuang A Multi-Host Con guration Vulnerability Checker Dan Zerkle and Karl Levitt Department vulnerabilities created by poor system con gu- ration. Vulnerabilities are discovered using a back- wards goal of these security concerns by check- ing networked con gurations forunintended security vulnerabilities. x2 reviews

  12. Apoyo a Estudios Geodinamicos con GPS en Guatemala

    NASA Astrophysics Data System (ADS)

    Robles, V. R.

    2013-05-01

    El Instituto Geografico Nacional de Guatemala implemento 17 estaciones GNSS en el año 2009, como un proyecto de credito mixto de donacion de equipamiento del Gobierno de Suiza, el cual, este equipamiento de estaciones CORS GNSS es un sistema de recepción y transmisión de datos crudos GPS RInex que utiliza la tecnologia Spider Web de Leica, asi mismo este sistema esta sirviendo para el espablecimiento de un marco geodesico nacional de coordenadas geodesicas oficiales, el cual se calculan u obtienen las velocidades en tiempos temporales programados de las 17 Estaciones CORS. La infraestructura del marco geodesico de Guatemala esta sirviendo de base para las aplicaciones de estudios geodinamicos como el monitoreo de del desplazamiento de las placas tectonicas por medio de un estudio que se inicio en el año de 1999, llamado medicion con GPS el sistema de Fallas de los rios Polochic Motagua de Guatemala, tambien para un estudio que se implemento para deformación de corteza terrestre local en un Volcan Activo de Guatemala llamado Pacaya. Para el estudio de medicion con GPS en el sistema de falla de los Rios del polochic Motagua se implementaron 16 puntos para medir con GPS de dos frecuencias en el año de 1999, el cual, tres puntos son estaciones geodesicas CORS IGS llamados GUAT, ELEN y HUEH, despues en el año de 2003 se hizo otra medicion en un total de 20 puntos, que permitió calcular las velocidades de desplazamieinto de los puntos en mención, usando como referencia el modelo NUVEL 1A de DeMets de la placa de Norteamerica. Este estudio fue en cooperación internacional por la universidad de Nice de Francia y el IGNde Francia. Para el estudio del monitoreo con GPS del volcan activo de Guatemala, se implementaron cuatro puntos al rededor del volcan, el cual, se realizan cuatro mediciones al año, que permiten determinar axialmente la distancias entre los puntos, y rebisar estadisticamente cual es el comportamiento de las distancias en funcion del tiempo, si existen diferencias graduales crecientes o decrecientes, que nos da un indicativo del desplazamiento de la corteza terrestre al rededor del volcan.

  13. Checking the Pulse of PitCon '88.

    PubMed

    1988-03-18

    At PitCon '88-otherwise known as the Pittsburgh Conference and Exposition on Analytical Chemistry and Applied Spectroscopy-exhibited instruments capitalized on improvements in existing technology rather than novel concepts or design. This year's models feature increasing automation, particularly for aspects of sample presentation. The 1988 generation of so-called hyphenated systems emphasize a combination of techniques within the same work station-gas chromatography to detect and separate organic contaminants combined with mass spectrometry to identify them, for example. And in keeping with strict environmental standards, many companies are stressing the ability of their latest instruments to detect levels of environmental pollutants in the parts per billion, rather than parts per million, range. PitCon '88 lured more than 25,000 participants to New Orleans for the week of 22 to 26 February. Approximately 830 companies displayed their wares at 2400 booths, and it took two separate facilities to house them. Specialized symposia on advances in spectroscopic, chromatographic, and electrochemical techniques increased in number as did the number of individual talks and posters. And new this year were three general interest symposia-identifying antiques by spectrochemical techniques, cholesterol, and drug testing in the workplace. PMID:17769734

  14. RoboCon: Operator interface for robotic applications

    SciTech Connect

    Schempf, H.; Warwick, J.; Fung, M.; Chemel, B.; Blackwell, M.

    1996-12-31

    Carnegie Mellon U. and ORNL`s Robotics and Process Systems Division are developing a state-of-the-art robot operator control station (RoboCon) with standardized hardware and software control interfaces to be adaptable to a variety of remote and robotic equipment currently funded by DOE`s Office of Science & Technology Robotics Technology Development Program. The human operation and telerobotic and supervisory control of sophisticated and remote and robotic systems is a complex, tiring, and non-intuitive activity. Since decontamination & decommissioning, selective equipment removal, mixed waste operations, and in-tank cleanup are going to be a major future activity in DOE environmental restoration and waste management cleanup agenda, it seems necessary to utilize an operator control station and interface which maximizes operator comfort and productivity.

  15. Neogene sequence stratigraphy, Nam Con Son Basin, offshore Vietnam

    SciTech Connect

    McMillen, K.J.; Do Van Luu; Lee, E.K.; Hong, S.S.

    1996-12-31

    An integrated well log, biostratigraphic, and seismic stratigraphic study of Miocene to Recent deltaic sediments deposited in the Nam Con Son Basin offshore from southern Vietnam shows the influence of eustacy and tectonics on sequence development. Sediments consist of Oligocene non-marine rift-basin fill (Cau Formation), early to middle Miocene tide-dominated delta plain to delta front sediments (TB 1.5 to TB 2.5, Due and Thong Formations), and late Miocene to Recent marine shelf sediments (TB. 2.6 to TB 3.1 0, Mang Cau, Nam Con Son, and Bien Dong Formations). Eustacy controlled the timing of key surfaces and sand distribution in the tectonically-quiet early Miocene. Tectonic effects on middle to late Miocene sequence development consist of thick transgressive systems tracts due to basin-wide subsidence and transgression, sand distribution in the basin center, and carbonate sedimentation on isolated fault blocks within the basin. Third-order sequence boundaries (SB) are identified by spore peaks, sand stacking patterns, and channel incision. In the basin center, widespread shale beds with coal occur above sequence boundaries followed by transgressive sandstone units. These TST sandstones merge toward the basin margin where they lie on older HST sandstones. Maximum flooding surfaces (MFS) have abundant marine microfossils and mangrove pollen, a change in sand stacking pattern, and often a strong seismic reflection with downlap. Fourth-order genetic-type sequences are also interpreted. The MFS is the easiest marker to identify and correlate on well logs. Fourth-order SB occur within these genetic units but are harder to identify and correlate.

  16. Neogene sequence stratigraphy, Nam Con Son Basin, offshore Vietnam

    SciTech Connect

    McMillen, K.J. ); Do Van Luu; Lee, E.K.; Hong, S.S. )

    1996-01-01

    An integrated well log, biostratigraphic, and seismic stratigraphic study of Miocene to Recent deltaic sediments deposited in the Nam Con Son Basin offshore from southern Vietnam shows the influence of eustacy and tectonics on sequence development. Sediments consist of Oligocene non-marine rift-basin fill (Cau Formation), early to middle Miocene tide-dominated delta plain to delta front sediments (TB 1.5 to TB 2.5, Due and Thong Formations), and late Miocene to Recent marine shelf sediments (TB. 2.6 to TB 3.1 0, Mang Cau, Nam Con Son, and Bien Dong Formations). Eustacy controlled the timing of key surfaces and sand distribution in the tectonically-quiet early Miocene. Tectonic effects on middle to late Miocene sequence development consist of thick transgressive systems tracts due to basin-wide subsidence and transgression, sand distribution in the basin center, and carbonate sedimentation on isolated fault blocks within the basin. Third-order sequence boundaries (SB) are identified by spore peaks, sand stacking patterns, and channel incision. In the basin center, widespread shale beds with coal occur above sequence boundaries followed by transgressive sandstone units. These TST sandstones merge toward the basin margin where they lie on older HST sandstones. Maximum flooding surfaces (MFS) have abundant marine microfossils and mangrove pollen, a change in sand stacking pattern, and often a strong seismic reflection with downlap. Fourth-order genetic-type sequences are also interpreted. The MFS is the easiest marker to identify and correlate on well logs. Fourth-order SB occur within these genetic units but are harder to identify and correlate.

  17. Ore LUNEDI' Aula MARTEDI' Aula MERCOLEDI' Aula GIOVEDI' Aula VENERDI' Aula Geol. Appl. con

    E-print Network

    Cesare, Bernardo

    .30-10.15 Geol. Appl. con elem. di leg. (Floris) 1F Rilevamento Geologico 2 (Pennacchioni Floris) 1B Rilevamento Geologico 2 (Pennacchioni Floris) 1B / Arch Geol. Appl. con elem. di leg. (Floris) 1B 10.30-11.15 Geol. Appl (Pennacchioni Floris) 1B / Arch Geol. Appl. con elem. di leg. (Floris) 1B 11.30-12.15 12.30-13.15 13.30-14.15 14

  18. Pros, Cons, and Alternatives to Weight Based Cost Estimating

    NASA Technical Reports Server (NTRS)

    Joyner, Claude R.; Lauriem, Jonathan R.; Levack, Daniel H.; Zapata, Edgar

    2011-01-01

    Many cost estimating tools use weight as a major parameter in projecting the cost. This is often combined with modifying factors such as complexity, technical maturity of design, environment of operation, etc. to increase the fidelity of the estimate. For a set of conceptual designs, all meeting the same requirements, increased weight can be a major driver in increased cost. However, once a design is fixed, increased weight generally decreases cost, while decreased weight generally increases cost - and the relationship is not linear. Alternative approaches to estimating cost without using weight (except perhaps for materials costs) have been attempted to try to produce a tool usable throughout the design process - from concept studies through development. This paper will address the pros and cons of using weight based models for cost estimating, using liquid rocket engines as the example. It will then examine approaches that minimize the impct of weight based cost estimating. The Rocket Engine- Cost Model (RECM) is an attribute based model developed internally by Pratt & Whitney Rocketdyne for NASA. RECM will be presented primarily to show a successful method to use design and programmatic parameters instead of weight to estimate both design and development costs and production costs. An operations model developed by KSC, the Launch and Landing Effects Ground Operations model (LLEGO), will also be discussed.

  19. Percutaneous coronary intervention in nonagenarians: pros and cons

    PubMed Central

    Biondi Zoccai, Giuseppe; Abbate, Antonio; D'Ascenzo, Fabrizio; Presutti, Davide; Peruzzi, Mariangela; Cavarretta, Elena; Marullo, Antonino G.M.; Lotrionte, Marzia; Frati, Giacomo

    2013-01-01

    Percutaneous coronary intervention is a mainstay in the management of symptomatic or high-risk coronary artery disease. The bulk of clinical evidence and experience underlying this fact relies, however, on relatively young patients. Indeed, few data of very limited quality are available which adequately define the risk-benefit and cost-benefit profile of coronary angioplasty and stenting in very old subjects, such as those of 90 years of age or older (i.e., nonagenarians). The aim of this review is to provide a concise, yet practical, synthesis of the available evidence on percutaneous coronary revascularization in the very elderly. The main arguments elaborated upon are to what extent we can extrapolate findings from studies including younger patients to nonagenarians, whether we should provide higher priority to prognosis or quality of life in such patients, and whether we can afford to allocate vast resources to care for such subjects in an era of financial constraints. Our review of 18 studies and 1082 patients suggest that percutaneous coronary intervention is feasible and associated with acceptable short- and long-term results in this population, which is nonetheless fraught with a high mortality risk irrespective of the revascularization procedure. Accordingly, the pros and cons of percutaneous coronary intervention should be carefully weighed when considering this treatment in nonagenarians. PMID:23610578

  20. La salud en personas con discapacidad intelectual en España: estudio europeo POMONA-II

    PubMed Central

    Martínez-Leal, Rafael; Salvador-Carulla, Luis; Gutiérrez-Colosía, Mencía Ruiz; Nadal, Margarida; Novell-Alsina, Ramón; Martorell, Almudena; González-Gordón, Rodrigo G.; Mérida-Gutiérrez, M. Reyes; Ángel, Silvia; Milagrosa-Tejonero, Luisa; Rodríguez, Alicia; García-Gutiérrez, Juan C.; Pérez-Vicente, Amado; García-Ibáñez, José; Aguilera-Inés, Francisco

    2011-01-01

    Introducción Estudios internacionales demuestran que existe un patrón diferenciado de salud y una disparidad en la atención sanitaria entre personas con discapacidad intelectual (DI) y población general. Objetivo Obtener datos sobre el estado de salud de las personas con DI y compararlos con datos de población general. Pacientes y métodos Se utilizó el conjunto de indicadores de salud P15 en una muestra de 111 sujetos con DI. Los datos de salud encontrados se compararon según el tipo de residencia de los sujetos y se utilizó la Encuesta Nacional de Salud 2006 para comparar estos datos con los de la población general. Resultados La muestra con DI presentó 25 veces más casos de epilepsia y el doble de obesidad. Un 20% presentó dolor bucal, y existió una alta presencia de problemas sensoriales, de movilidad y psicosis. Sin embargo, encontramos una baja presencia de patologías como la diabetes, la hipertensión, la osteoartritis y la osteoporosis. También presentaron una menor participación en programas de prevención y promoción de la salud, un mayor número de ingresos hospitalarios y un uso menor de los servicios de urgencia. Conclusiones El patrón de salud de las personas con DI difiere del de la población general, y éstas realizan un uso distinto de los servicios sanitarios. Es importante el desarrollo de programas de promoción de salud y de formación profesional específicamente diseñados para la atención de personas con DI, así como la implementación de encuestas de salud que incluyan datos sobre esta población. PMID:21948011

  1. ConSearch: An Electronic Document Research and Retrieval Utility for Windows from Management Information Technologies.

    ERIC Educational Resources Information Center

    Combs, Joseph, Jr.

    1995-01-01

    Reviews ConSearch 3.0, a product that provides flexible searching of electronic files, allowing the location of related meanings as well as exact matches. ConSearch 3.0 differs from other file retrieval approaches by relating words in search phrases of questions to the "meaning" of the words, which are stored in a "conceptual database," or lexicon…

  2. Accesibilidad para personas con debilidad visual Mac OS X Snow Leopard

    E-print Network

    Villanueva, Alicia

    Accesibilidad para personas con debilidad visual Mac OS X Snow Leopard ASIC ­ 18 de noviembre de 2010 Pág. 1 de 25 GUÍA DE ACCESIBILIDAD PARA PERSONAS CON DEBILIDAD VISUAL EN ENTORNO MAC OS X SNOW LEOPARD Al igual que otros sistemas operativos, MAC OS X Snow Leopard ofrece algunas ayudas para que las

  3. Meeting Report: Breath Biomarkers Networking Sessions at PittCon 2010, Orlando, Florida

    EPA Science Inventory

    The Pittsburgh Conference and Exposition, or "PittCon" (www.pittcon.org/), is one of the largest international conferences for analytical chemistry and instrumentation typically attracting about 25,000 attendees and 1,000 commercial exhibitors. PittCon began in 1950 as a small sp...

  4. CARMA Memorandum Series #5 1 Compact Con guration Evaluation for CARMA

    E-print Network

    , and pipeline the results into tables. We present tables of beam FWHM, brightness sensitivity and sidelobe;gurations provide the best brightness sensitivity, but su#11;er from antenna shadowing. Spiral con#12 compact con#12;gurations to provide good imaging using only 6.1 and 10.4 m antennas, with an eye towards

  5. Guiado de un robot mvil con cinemtica de triciclo Joaquim A. Batlle(1)

    E-print Network

    Font, Josep Maria

    Guiado de un robot móvil con cinemática de triciclo Joaquim A. Batlle(1) , Josep Maria Font(1 seguimiento de trayectorias­ es un tema clave en la navegación de robots móviles. En este trabajo se presenta un método de guiado, para un robot móvil con cinemática de triciclo, que a partir de los errores de

  6. Surgical animal models of neuropathic pain: Pros and Cons.

    PubMed

    Challa, Siva Reddy

    2015-03-01

    One of the biggest challenges for discovering more efficacious drugs for the control of neuropathic pain has been the diversity of chronic pain states in humans. It is now acceptable that different mechanisms contribute to normal physiologic pain, pain arising from tissue damage and pain arising from injury to the nervous system. To study pain transmission, spot novel pain targets and characterize the potential analgesic profile of new chemical entities, numerous experimental animal pain models have been developed that attempt to simulate the many human pain conditions. Among the neuropathic pain models, surgical models have paramount importance in the induction of pain states. Many surgical animal models exist, like the chronic constriction injury (CCI) to the sciatic nerve, partial sciatic nerve ligation (pSNL), spinal nerve ligation (SNL), spared nerve injury (SNI), brachial plexus avulsion (BPA), sciatic nerve transaction (SNT) and sciatic nerve trisection. Most of these models induce responses similar to those found in causalgia, a syndrome of sustained burning pain often seen in the distal extremity after partial peripheral nerve injury in humans. Researchers most commonly use these surgical models in both rats and mice during drug discovery to screen new chemical entities for efficacy in the area of neuropathic pain. However, there is scant literature that provides a comparative discussion of all these surgical models. Each surgical model has its own benefits and limitations. It is very difficult for a researcher to choose a suitable surgical animal model to suit their experimental set-up. Therefore, particular attention has been given in this review to comparatively provide the pros and cons of each model of surgically induced neuropathic pain. PMID:24831263

  7. Synergistic hemolysins of coagulase-negative staphylococci (CoNS).

    PubMed

    Ró?alska, Ma?gorzata; Derczy?ska, Anna; Maszewska, Agnieszka

    2015-01-01

    A total of 104 coagulase negative staphylococci, belonging to S. capitis, S. hominis, S. haemolyticus and S. warneri, originating from the collection of the Department of Pharmaceutical Microbiology (ZMF), Medical University of Lodz, Poland, were tested for their synergistic hemolytic activity. 83% of strains produced ?-hemolysin, however, the percentage of positive strains of S. haemolyticus, S. warneri, S. capitis and S. hominis was different - 98%, 78%, 75% and 68%, respectively. Highly pure hemolysins were obtained from culture supernatants by protein precipitation with ammonium sulphate (0-70% of saturation) and extraction by using a mixture of organic solvents. The purity and molecular mass of hemolysins was determined by TRIS/Tricine PAGE. All CoNS hemolysins were small peptides with a molar mass of about 3.5 kDa; they possessed cytotoxic activity against the line of human foreskin fibroblasts ATCC Hs27 and lysed red cells from different mammalian species, however, the highest activity was observed when guinea pig, dog and human red blood cells were used. The cytotoxic effect on fibroblasts occurred within 30 minutes. The S. cohnii ssp. urealyticus strain was used as a control. The antimicrobial activity was examined using hemolysins of S. capitis, S. hominis, S. cohnii ssp. cohnii and S. cohnii ssp. urealyticus. Hemolysins of the two S. cohnii subspecies did not demonstrate antimicrobial activity. Cytolysins of S. capitis and S. hominis had a very narrow spectrum of action; out of 37 examined strains, the growth of only Micrococcus luteus, Corynebacterium diphtheriae and Pasteurella multocida was inhibited. PMID:26634231

  8. Aspergilosis cervical con diseminación al sistema nervioso central. Presentación de un caso y revisión de bibliografía

    PubMed Central

    Vergara, Guillermo Enrique; Roura, Natalia; del Castillo, Marcelo; Mora, Andrea; Alcorta, Santiago Condomi; Mormandi, Rubén; Cervio, Andrés; Salvat, Jorge

    2015-01-01

    Introducción: la Aspergilosis Invasiva (AI) del Sistema Nervioso Central (SNC) es infrecuente y ocurre generalmente en pacientes inmunocomprometidos. Puede presentarse con cuadros de meningitis, aneurismas micóticos, infartos o abscesos. Es una infección con pronóstico reservado y puede afectar el SNC de forma primaria o secundaria a partir de un foco que se disemina por vía hematógena. Presentamos el caso de un paciente con AI con invasión primaria a nivel óseo y diseminación posterior al cerebro. Caso clínico: Paciente masculino de 25 años con diagnóstico de leucemia linfática aguda en tratamiento quimioterápico que presentó neumonitis por metotrexate por lo que inicia tratamiento con corticoides. Posteriormente agregó cervicalgia y con el diagnóstico de osteomielitis cervical se realiza punción bajo tomografía computada (TC) sin aislarse gérmenes. Se colocó Halo Vest e inició tratamiento antibiótico empírico. Posteriormente presentó afasia de expresión secundaria a lesión frontal izquierda. Se realizó evacuación de absceso cerebral aislando A. fumigatus. El tratamiento antibiótico específico posterior permitió una buena respuesta clínica y radiológica. Conclusión: La presencia de lesiones en el SNC de pacientes inmunocomprometidos debe incluir a las micosis como diagnóstico diferencial. La evacuación quirúrgica permite llegar rápidamente al diagnóstico mejorando la respuesta posterior al tratamiento antibiótico. Para evaluar la respuesta terapéutica y posibles recaídas se debe realizar un seguimiento periódico clínico radiológico. Palabras clave: Aspergilosis cerebral; Aspergilosis cervical; Aspergilosis invasiva; Voriconazol. PMID:26600985

  9. FDA aprueba fármaco en combinación para pacientes con cáncer colorrectal avanzado

    Cancer.gov

    aprobó una tableta que combina los fármacos trifluridina y clorhidrato de tipiracilo (Lonsurf®) para tratar a pacientes con cáncer colorrectal metastático cuya enfermedad haya avanzado después de tratamientos convencionales.

  10. Tensión postraumática relacionada con el cáncer (PDQ)—Versión para profesionales de salud

    Cancer.gov

    Resumen de información revisada por expertos acerca de la tensión postraumática y síntomas relacionados en los pacientes con cáncer, sobrevivientes del cáncer y miembros de la familia. Se discuten la evaluación y tratamiento de estos síntomas.

  11. Aumento de la supervivencia en hombres con cáncer de próstata metastásico que reciben quimioterapia

    Cancer.gov

    Los hombres con cáncer de próstata metastásico sensible a las hormonas que recibieron el fármaco quimioterapéutico docetaxel al inicio de la terapia hormonal convencional vivieron más tiempo que los pacientes que recibieron solo terapia hormonal, de acuer

  12. denomino CASA CON-CIENCIA. Este proyecto naci gracias a la inquietud de la Asociacin Gilberto

    E-print Network

    almacenar agua pluvial y fogón ahorrador de leña. Gracias al proyecto, la familia de Inés y Francisco con. Alejandro Manzano Ramírez. #12;vigilancia de la calidad del aire en el ambiente de las plataformas del metro

  13. Modelling Con ict-Resolution Dialogues Fiorella de Rosis, Floriana Grasso, Cristiano Castelfranchi, and Isabella Poggi

    E-print Network

    Bari, Università degli Studi di

    Modelling Con ict-Resolution Dialogues Fiorella de Rosis, Floriana Grasso, Cristiano Castelfranchi and promising research objective (Ca~namero, 1998, de Rosis, 1999, Prevost and Churchill, 1998), aimed

  14. Tensión postraumática relacionada con el cáncer (PDQ)—Versión para pacientes

    Cancer.gov

    Resumen de información revisada por expertos acerca de la tensión postraumática y los síntomas relacionados en los pacientes con cáncer, sobrevivientes del cáncer y miembros de la familia. Se discuten la evaluación y el tratamiento de estos síntomas.

  15. The International Consortium for the Investigation of Renal Malignancies (I-ConFIRM)

    Cancer.gov

    The International Consortium for the Investigation of Renal Malignancies (I-ConFIRM) was formed to promote international, multidisciplinary collaborations to advance our understanding of the etiology and outcomes of kidney cancer.

  16. Red GPS a Tiempo Real con Precisiones Centrimtricas para Utilizar en los Sistemas de

    E-print Network

    Gilbes, Fernando

    Red GPS a Tiempo Real con Precisiones Centrimétricas para Utilizar en los Sistemas de Información Desarrollo Tecnológico Instrumentación · Distanciómetros · Total Stations + Cámara +GPS · Laser Scanners · GPS · GPS Reference Stations · GPS Internet Ready · PDA · Tecnología Bluetooth Mapa de Puerto Rico

  17. Updated F.15 for CONm students registering for Spring, 2016 Advising Notes Construction Engineering (CON) -Mechanical Concentration

    E-print Network

    Frey, H. Christopher

    Updated F.15 for CONm students registering for Spring, 2016 Advising Notes ­ Construction to CON students. #12;Updated F.15 for CONm students registering for Spring, 2016 Advising Notes Engineering (CON) - Mechanical Concentration 1 Note: If you have an advisee that is a CON, Mechanical

  18. Evaluation of the ACT*DE*CON{sup SM} process for treating gunite tank sludge

    SciTech Connect

    Spencer, B.B.; Chase, C.W.; Egan, B.Z.

    1996-05-01

    A test was conducted to evaluate this process for selectively removing actinides from Gunite tank sludge. Mixed waste sludge from Gunite tank W-6 was subjected to the ACT*DE*CON selective leaching process. (Nearly all the TRU content was attributed to Pu.) The sludge sample was first washed with 0.01M NaOH to remove excess sodium and nitrate in the interstitial liquid supernatant. The washed wet solids were treated with the ACT*DE*CON solvent (aqueous carbonate solution containing a chelating agent and an oxidant), using a ratio of 20 ml solvent per gram wet solids. Sludge and solvent were separated by centrifugation, and the ACT*DE*CON treatment was repeated twice. Analyses showed that 71% of the solids in the sludge were dissolved while 80% of the TRU-waste components dissolved. Low separation of the TRU-waste components from other components of the sludge mixture is indicated. Almost all the U and Ca were removed from the sludge. For sludges where most of the TRU content is Pu, the ACT*DE*CON process as tested is not effective in rendering the sludge a non-TRU waste. It is recommended that ACT*DE*CON be optimized for this specific application and that other processes using different chelating and oxidizing agents be tested. Also, the ACT*DE*CON process should be tested on TRU mixed waste in which most of the TRU elements are not Pu.

  19. SLUDGE PARTICLE SEPAPATION EFFICIENCIES DURING SETTLER TANK RETRIEVAL INTO SCS-CON-230

    SciTech Connect

    DEARING JI; EPSTEIN M; PLYS MG

    2009-07-16

    The purpose of this document is to release, into the Hanford Document Control System, FA1/0991, Sludge Particle Separation Efficiencies for the Rectangular SCS-CON-230 Container, by M. Epstein and M. G. Plys, Fauske & Associates, LLC, June 2009. The Sludge Treatment Project (STP) will retrieve sludge from the 105-K West Integrated Water Treatment System (IWTS) Settler Tanks and transfer it to container SCS-CON-230 using the Settler Tank Retrieval System (STRS). The sludge will enter the container through two distributors. The container will have a filtration system that is designed to minimize the overflow of sludge fines from the container to the basin. FAI/09-91 was performed to quantify the effect of the STRS on sludge distribution inside of and overflow out of SCS-CON-230. Selected results of the analysis and a system description are discussed. The principal result of the analysis is that the STRS filtration system reduces the overflow of sludge from SCS-CON-230 to the basin by roughly a factor of 10. Some turbidity can be expected in the center bay where the container is located. The exact amount of overflow and subsequent turbidity is dependent on the density of the sludge (which will vary with location in the Settler Tanks) and the thermal gradient between the SCS-CON-230 and the basin. Attachment A presents the full analytical results. These results are applicable specifically to SCS-CON-230 and the STRS filtration system's expected operating duty cycles.

  20. 40 CFR 60.244 - Test methods and procedures.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    .../hr/Mg (lb/hr/ton) of equivalent P2O5 stored. Csi=concentration of total fluorides from emission point... (dscf/hr). N=number of emission points in the affected facility. P=equivalent P2O5 stored, metric tons... and 0.85 dscm (30 dscf). (3) The equivalent P2O5 feed rate (P) shall be computed for each run...

  1. Con-specific neighbours may enhance compensation capacity in an invasive plant.

    PubMed

    Lu, X; Dai, H; Ding, J

    2010-05-01

    Facilitation, both by inter- and intra-specific neighbours, is known to be an important process in structuring plant communities. However, only a small number of experiments have been reported on facilitation in plant invasions, especially between invasive con-specific individuals. Here, we focus on how con-specific neighbours of the invasive alien plant alligator weed affect the tolerance of alligator weed to herbivory by the introduced biological control agent, Agasicles hygrophila. We conducted greenhouse and garden experiments in which invasive plant density and herbivory intensity (artificial clipping and real herbivory) were manipulated. In the greenhouse experiment, artificial clipping significantly reduced plant biomass when plants were grown individually, but when con-specific neighbours were present in the same pot, biomass was not significantly different from control plants. Similarly, when compared to control plants, plants that were subjected to herbivory by A. hygrophila produced more biomass when grown with two con-specific neighbours than when grown alone. Real herbivory also resulted in an increased number of vegetative buds, and again when two con-specific neighbours were present this effect was increased (a 55.3% increase in buds when there was no neighbour, but a 111.6% increase in buds when two con-specific neighbours were present). In the garden experiment, in which plants were grown at high density (6 plants per pot), alligator weed fully recovered from defoliation caused by insects at levels from 20-30% to 100%. Our results indicate that the con-specific association may increase the compensatory ability to cope with intense damage in this invasive plant. PMID:20522180

  2. Virulence, Speciation and Antibiotic Susceptibility of Ocular Coagualase Negative Staphylococci (CoNS)

    PubMed Central

    Priya, Ravindran; Mythili, Arumugam; Singh, Yendremban Randhir Babu; Sreekumar, Haridas; Manikandan, Palanisamy; Panneerselvam, Kanesan

    2014-01-01

    Background: Coagulase negative Staphylococci (CoNS) are common inhabitants of human skin and mucous membranes. With the emergence of these organisms as prominent pathogens in patients with ocular infections, investigation has intensified in an effort to identify important virulence factors and to inform new approaches to treatment and prevention. Aim: To isolate CoNS from ocular specimens; to study the possible virulence factors; speciation of coagulase negative staphylococci (CoNS) which were isolated from ocular complications; antibiotic susceptibility testing of ocular CoNS. Materials and Methods: The specimens were collected from the target patients who attended the Microbiology Laboratory of a tertiary care eye hospital in Coimbatore, Tamilnadu state, India. The isolates were subjected to tube and slide coagulase tests for the identification of CoNS. All the isolates were subjected to screening for lipase and protease activities. Screening for other virulence factors viz., slime production on Congo red agar medium and haemagglutination assay with use of 96-well microtitre plates. These isolates were identified upto species level by performing biochemical tests such as phosphatase test, arginine test, maltose and trehalose fermentation tests and novobiocin sensitivity test. The isolates were subjected to antibiotic susceptibility studies, based on the revised standards of Clinical and Laboratory Standards Institutes (CLSI). Results: During the one year of study, among the total 260 individuals who were screened, 100 isolates of CoNS were obtained. Lipolytic activity was seen in all the isolates, whereas 38 isolates showed a positive result for protease. A total of 63 isolates showed slime production. Of 100 isolates, 30 isolates were analyzed for haemagglutination, where 4 isolates showed the capacity to agglutinate the erythrocytes. The results of the biochemical analysis revealed that of the 100 isolates of CoNS, 43% were Staphylococcus epidermidis. The other isolates were identified as S. xylosus (n=8), S. captis (n=16), S. haemolyticus (n=10), S. saccharolyticus (n=2), S. hominis (n=5), S. saprophyticus (n=6) and S. intermedius (n=1). On the other hand, 9 isolates were not identified. In the antibiotic susceptibility analysis, it was found that most of the isolates were sensitive to vancomycin, amikacin and linczolid and resistant to cefatoxime, oxacillin, bacitracin and nalidixic acid. Conclusion: S. epidermidis was found to be predominant in causing the ocular complications. Slime production, heamagglutination, protease and lipase activities could be the putative virulence factors of CoNS. Antibiotic susceptibility patterns of CoNS against antibacterial agents revealed maximum resistance to beta lactam groups, and the resistance was found to be higher to oxacillin, and lowest to vancomycin. PMID:24995181

  3. Structural basis of ConM binding with resveratrol, an anti-inflammatory and antioxidant polyphenol.

    PubMed

    Rocha, Bruno A M; Teixeira, Claudener S; Silva-Filho, José C; Nóbrega, Raphael B; Alencar, Daniel B; Nascimento, Kyria S; Freire, Valder N; Gottfried, Carmem J S; Nagano, Celso S; Sampaio, Alexandre H; Saker-Sampaio, Silvana; Cavada, Benildo S; Delatorre, Plínio

    2015-01-01

    Resveratrol can also inhibit the activation of proinflammatory mediators and cytokines at the early gene expression stage. It is well known that lectins are sugar-binding proteins that act as both pro- and anti-inflammatory molecules. Thus, the objective of this work was to verify the binding of a polyphenol compound with a lectin of Canavalia maritima (ConM) based on their ability to inhibit pro-inflammatory processes. To accomplish this, ConM was purified and crystallized, and resveratrol was soaked at 5mM for 2h of incubation. The crystal belongs to the monoclinic space group C2, the final refinement resulted in an Rfactor of 16.0% and an Rfree of 25.5%. Resveratrol binds in the rigid ?-sheet through H-bonds and hydrophobic interaction with amino acids that compose the fifth and sixth ?-strands of the rigid ?-sheet of ConM. The ConM and resveratrol inhibited DPPH oxidation, showing synergic activity with the most effective ratio of 2:3 and carbohydrate binding site is not directly related to antioxidant activity. It is the interaction between ConM and resveratrol that indicates the synergism of these two molecules in acting as free radicals scavengers and in reducing the inflammatory process through the inhibition of many pro-inflammatory events. PMID:25192853

  4. Prevalencia y tamizaje del Trastorno por Déficit de Atención con Hiperactividad en Costa Rica

    PubMed Central

    Weiss, Nicholas T.; Schuler, Jovita; Monge, Silvia; McGough, James J.; Chavira, Denise; Bagnarello, Monica; Herrera, Luis Diego; Mathews, Carol A.

    2015-01-01

    Resumen La investigación tuvo como propósito estimar la prevalencia del Trastorno por Déficit de Atención con Hiperactividad (TDAH) en Costa Rica y determinar si la versión en español del cuestionario Swanson Nolan and Pelham Scale IV (SNAP-IV) es un instrumento de tamizaje útil en una población de niños y niñas escolares costarricenses. El instrumento fue entregado a padres y maestros de 425 niños entre 5 y 13 años de edad (promedio = 8.8). Todos fueron evaluados con el instrumento Swanson, Kotkin, Agler, M-Flynn and Pelham Scale (SKAMP). Su diagnóstico fue confirmado con una entrevista clínica. La sensibilidad y la especificidad del SNAP-IV fueron evaluadas como predictores de criterios de diagnóstico según el DSM-IV. La prevalencia puntual en la muestra del TDAH fue del 5%. El tamizaje más preciso lo hizo el SNAP-IV completado por el maestro en un corte de 20%, con una sensibilidad de 96% y una especificidad de un 82%. La sensibilidad de los instrumentos completados por los padres fue más baja que aquella de los maestros. El SNAP-IV completado por las maestras con un corte aislando el 20% de los mayores puntajes categorizó correctamente a un 87% de los sujetos. PMID:22432094

  5. ConA-based glucose sensing using the long-lifetime azadioxatriangulenium fluorophore

    NASA Astrophysics Data System (ADS)

    Cummins, Brian; Simpson, Jonathan; Gryczynski, Zygmunt; Sørensen, Thomas Just; Laursen, Bo W.; Graham, Duncan; Birch, David; Coté, Gerard

    2014-02-01

    Fluorescent glucose sensing technologies have been identified as possible alternatives to current continuous glucose monitoring approaches. We have recently introduced a new, smart fluorescent ligand to overcome the traditional problems of ConA-based glucose sensors. For this assay to be translated into a continuous glucose monitoring device where both components are free in solution, the molecular weight of the smart fluorescent ligand must be increased. We have identified ovalbumin as a naturally-occurring glycoprotein that could serve as the core-component of a 2nd generation smart fluorescent ligand. It has a single asparagine residue that is capable of displaying an N-linked glycan and a similar isoelectric point to ConA. Thus, binding between ConA and ovalbumin can potentially be monovalent and sugar specific. This work is the preliminary implementation of fluorescently-labeled ovalbumin in the ConA-based assay. We conjugate the red-emitting, long-lifetime azadioxatriangulenium (ADOTA+) dye to ovalbumin, as ADOTA have many advantageous properties to track the equilibrium binding of the assay. The ADOTA-labeled ovalbumin is paired with Alexa Fluor 647-labeled ConA to create a Förster Resonance Energy Transfer (FRET) assay that is glucose dependent. The assay responds across the physiologically relevant glucose range (0-500 mg/dL) with increasing intensity from the ADOTA-ovalbumin, showing that the strategy may allow for the translation of the smart fluorescent ligand concept into a continuous glucose monitoring device.

  6. [Le disfunzioni sessuali in pazienti con primo esordio psicotico valutati secondo una prospettiva di genere].

    PubMed

    Ciocca, Giacomo; Usall, Judith; Dolz, Montse; Limoncin, Erika; Gravina, Giovanni L; Carosa, Eleonora; Sánchez, Bernardo; Barajas, Ana; Baños, Iris; Huerta, Elena; Farreny, Aida; Franchi, Camilla; Group, Genipe; Ochoa, Susana

    2015-01-01

    RIASSUNTO. Scopo. I pazienti con un disturbo mentale cronico spesso possono soffrire di disfunzioni sessuali. La funzione sessuale dei nuovi pazienti con primo esordio psicotico è stata poco studiata. L'obiettivo di questo studio è quello di indagare le differenze di genere nella funzione sessuale in persone con primo episodio psicotico. Metodi. Hanno partecipato alla ricerca un gruppo di 40 uomini e 37 donne con primo episodio psicotico, a cui è stato somministrato un protocollo psichiatrico composto dalla PANSS, dall'UKU, e dalla SCID-DSM-IV per effettuare la diagnosi. Risultati. Nel gruppo maschile, il 42,5% dei pazienti aveva disfunzioni sessuali, mentre la percentuale nelle gruppo femminile è stata del 37,8%. Non c'è stata nessuna correlazione tra disfunzioni sessuali e psicopatologia negli uomini. Invece, nelle donne la psicopatologia generale e i sintomi positivi sono risultati associati all'alterazione della lubrificazione vaginale (r=0,547; p=0,003) and (r=0,485; p=0,011), sebbene anche l'alterazione nella risposta orgasmica è risultata correlare con la psicopatologia generale (r=0,500; p=0,013). Inoltre, è stata trovata un'associazione tra l'alterazione della lubrificazione vaginale con la depressione (r=0,627; p<0,0001) e il disturbo della volontà (r=0,600; p<0,001). Discussione e conclusioni. Questi dati suggeriscono che l'associazione tra disfunzioni sessuali e psicopatologia ha riguardato esclusivamente le donne. Pertanto, durante la presa in carico dei pazienti è fondamentale considerare l'associazione genere-specifica tra psicopatologia e problemi sessuali. PMID:26489073

  7. ConTour: Data-Driven Exploration of Multi-Relational Datasets for Drug Discovery.

    PubMed

    Partl, Christian; Lex, Alexander; Streit, Marc; Strobelt, Hendrik; Wassermann, Anne-Mai; Pfister, Hanspeter; Schmalstieg, Dieter

    2014-12-01

    Large scale data analysis is nowadays a crucial part of drug discovery. Biologists and chemists need to quickly explore and evaluate potentially effective yet safe compounds based on many datasets that are in relationship with each other. However, there is a lack of tools that support them in these processes. To remedy this, we developed ConTour, an interactive visual analytics technique that enables the exploration of these complex, multi-relational datasets. At its core ConTour lists all items of each dataset in a column. Relationships between the columns are revealed through interaction: selecting one or multiple items in one column highlights and re-sorts the items in other columns. Filters based on relationships enable drilling down into the large data space. To identify interesting items in the first place, ConTour employs advanced sorting strategies, including strategies based on connectivity strength and uniqueness, as well as sorting based on item attributes. ConTour also introduces interactive nesting of columns, a powerful method to show the related items of a child column for each item in the parent column. Within the columns, ConTour shows rich attribute data about the items as well as information about the connection strengths to other datasets. Finally, ConTour provides a number of detail views, which can show items from multiple datasets and their associated data at the same time. We demonstrate the utility of our system in case studies conducted with a team of chemical biologists, who investigate the effects of chemical compounds on cells and need to understand the underlying mechanisms. PMID:26356902

  8. Obtención de velocidades radiales de precisión con el espectrógrafo REOSC de CASLEO

    NASA Astrophysics Data System (ADS)

    González, J. F.; Lapasset, E.

    Con el fin de ser empleados como espectros de referencia, han sido obtenidos recientemente 80 espectrogramas de estrellas candidatas a patrones de velocidad radial de todos los tipos espectrales desde B0 a M5, con una dispersión aproximada de 7 Å/mm. Se estudia la influencia de distintos factores (flexión, refracción atmosférica, etc.) en la determinación de velocidades radiales. Se analizan diferentes técnicas de reducción y medición de velocidades, su aplicación a estrellas de diferentes tipos espectrales y velocidades de rotación y se discute la precisión obtenible en cada caso.

  9. 'El teatro me ha dejado a mí': Una entrevista con Antón Arrufat"

    E-print Network

    Christoph, Nancy

    1999-04-01

    teatro me ha dejado a mí": Una entrevista con Antón Arrufat Nancy Christoph [Antón Arrufat nació en Santiago de Cuba en 1935. Además de ser dramaturgo, es poeta y narrador. Su obra dramática incluye: El cave se investiga (1957), El último tren (1959... no escribo teatro. Recibí muy males reacciones. El teatro me creó problemas de carácter político, y dejé de escribirlo.1 Era un género que escribía con mucha facilidad, y que me gustaba hacer. Es el que menos trabajo me cuesta. Puedo hacer una obra de...

  10. Un director chileno en el Berliner Ensemble (Entrevista con Alejandro Quintana Contreras)

    E-print Network

    Bravo-Elizondo, Pedro

    1987-04-01

    una adaptación de Víctor Carvajal, actor del grupo, quien se inicia como autor dramático. Esta obra con muy poco texto y mucho juego, en que la expresión corporal jugaba el papel fundamental, fue el gran salto hacia adelante del grupo. "Como éramos..., Holanda. Todo un éxito. Poco a poco comenzaron a trabajar con el idioma. Cada actor tenía incorporado a su vestuario una libretita y en los momentos fundamentales en que la palabra era lo esencial para entregar una información, se paraba el juego y...

  11. Copyright 2008 Psychonomic Society, Inc. 116 Categorization performances by pigeons can be con-

    E-print Network

    Herbranson, Wally

    Copyright 2008 Psychonomic Society, Inc. 116 Categorization performances by pigeons can be con rela- tions among stimuli become problematic (Herrnstein, Loveland, & Cable, 1976). Pigeons learn to describe experimental results from both hu- mans and pigeons (Herrnstein et al., 1976; Rosch, 1978

  12. Wind power is a rapidly growing con-tributor to worldwide energy supplies and

    E-print Network

    Doty, Sharon Lafferty

    Wind power is a rapidly growing con- tributor to worldwide energy supplies and UW Atmospheric rapidly moved into the new field of wind energy prediction, using a sophisticated suite of numerical and is the larg- est wind energy prediction firm in the U.S. A number of other UW alumni have joined 3TIER over

  13. PERMISOS Y LICENCIAS RELACIONADOS CON LA MATERNIDAD Y LA PATERNIDAD PERMISOS Y LICENCIAS DERECHO OBSERVACIONES

    E-print Network

    Fernández Pascual, Ricardo

    PERMISOS Y LICENCIAS RELACIONADOS CON LA MATERNIDAD Y LA PATERNIDAD PERMISOS Y LICENCIAS DERECHO completas el tiempo correspondiente (4 semanas una vez finalizado el permiso de maternidad) - Este derecho hospitalizados a continuación del parto Art. 48.1. g) Estatuto Básico Empleado - Derecho a ausentarse del trabajo

  14. HumanWildlife Conflicts 3(1):7287, Spring 2009 Historical review of elkagriculture con-

    E-print Network

    Human­Wildlife Conflicts 3(1):72­87, Spring 2009 Historical review of elk­agriculture con- flicts_brook@umanitoba.ca Abstract: Conflicts between elk (Cervus elaphus) and farmers have been occurring since the 1880s when related to low elk numbers caused primarily by unregulated harvest of elk. The creation of RMNP in 1930

  15. Un programa innovador busca ayudar a las personas que cuidan a pacientes con cáncer

    Cancer.gov

    Artículo sobre un programa educativo del City of Hope Cancer Center que ofrece a los profesionales de salud la información y las herramientas necesarias para ayudar a los familiares a saber cómo cuidarse a si mismos y a sus seres queridos con cáncer.

  16. 40 CFR 227.27 - Limiting permissible con-cen-tra-tion (LPC).

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 40 Protection of Environment 24 2010-07-01 2010-07-01 false Limiting permissible con-cen-tra-tion (LPC). 227.27 Section 227.27 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) OCEAN DUMPING CRITERIA FOR THE EVALUATION OF PERMIT APPLICATIONS FOR OCEAN DUMPING OF MATERIALS Definitions § 227.27 Limiting...

  17. 40 CFR 227.27 - Limiting permissible con-cen-tra-tion (LPC).

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 40 Protection of Environment 25 2011-07-01 2011-07-01 false Limiting permissible con-cen-tra-tion (LPC). 227.27 Section 227.27 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) OCEAN DUMPING CRITERIA FOR THE EVALUATION OF PERMIT APPLICATIONS FOR OCEAN DUMPING OF MATERIALS Definitions § 227.27 Limiting...

  18. recruited from other Pediatric Oncology Group (POG) institutions before treatment began. Informed con-

    E-print Network

    Eddy, Sean

    , 3986 (1998). 31. Supported by National Institute of Child Health & Human Development grant 1R29HD35309 con- sent was obtained, and procedures approved by the Committee on Human Research at the University cell fraction was obtained for the T cell cloning assay within 12 to 24 hours of its collection

  19. Simulacin de sistemas complejos con agentes Xalapa, 13 de mayo 2011

    E-print Network

    Guerra Hernández, Alejandro

    · Carlos Cervigón, Eva Ullán, Diego Blanco, Lucila Finkel (Dep. Sociología IV) 7 PhD students (MEC, UCM, Conacyt, project fellowships): · Carlos Rodríguez, José M. Fdez de Alba, Albert Meco, Fernando Burillo fellowships) SiCoSSys project, 2010 Simulación de sistemas complejos con agentes 2 #12;MDE + AOSE UCM

  20. Adsornftl 8~f^Ll* ORNL/CON-155 O173IS1o COp

    E-print Network

    Oak Ridge National Laboratory

    of Stirling Engine Thermodynamics N. C. J. Chen F. P. Griffin C. D. West OPERATED BY TAHP *MARTIN MARIETTA Government or any agency thereof. #12;ORNL/CON-155 LINEAR HARMONIC ANALYSIS OF STIRLING ENGINE THERMODYNAMICS ................... 8 2.3 Integrated Energy Equations ......................... 11 2.4 Engine Performance Parameters

  1. 40 CFR 227.27 - Limiting permissible con-cen-tra-tion (LPC).

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 40 Protection of Environment 26 2012-07-01 2011-07-01 true Limiting permissible con-cen-tra-tion (LPC). 227.27 Section 227.27 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) OCEAN DUMPING CRITERIA FOR THE EVALUATION OF PERMIT APPLICATIONS FOR OCEAN DUMPING OF MATERIALS Definitions § 227.27 Limiting...

  2. Iron formations are typically thinly bed-ded or laminated sedimentary rocks con-

    E-print Network

    Fischer, Woodward

    222 ABSTRACT Iron formations are typically thinly bed- ded or laminated sedimentary rocks con- taining 15% or more of iron and a large pro- portion of silica (commonly >40%). In the ca. 2590­2460 Ma Campbellrand-Kuruman Complex, Transvaal Supergroup, South Africa, iron formation occurs as a sediment- starved

  3. The Con Edison Emergency Child Care Plan for Management Employees: Summary Plan Description.

    ERIC Educational Resources Information Center

    Consolidated Edison Co., Brooklyn, NY.

    This summary plan description offers guidelines for participation in a pilot program that provides short-term emergency care for children of Con Edison managers who are under 13 years old. The plan offers professional, in-home child care that can be used when usual arrangements have collapsed. The summary plan description addresses the following…

  4. 40 CFR 227.27 - Limiting permissible con-cen-tra-tion (LPC).

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 40 Protection of Environment 25 2014-07-01 2014-07-01 false Limiting permissible con-cen-tra-tion (LPC). 227.27 Section 227.27 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) OCEAN DUMPING CRITERIA FOR THE EVALUATION OF PERMIT APPLICATIONS FOR OCEAN DUMPING OF MATERIALS Definitions § 227.27 Limiting...

  5. GENERAL TECHNICAL REPORT PSW-GTR-245 Cambio Climtico y su Relacin con los

    E-print Network

    GENERAL TECHNICAL REPORT PSW-GTR-245 246 Cambio Climático y su Relación con los Ecosistemas de afectados severamente al haber un cambio en su ecosistema (Food and Agriculture Organization [FAO], 2012). El fuego juega un papel importante en la conservación de la biodiversidad y los ecosistemas. El

  6. SERVICIOS HDRICOS DE LOS ECOSISTEMAS Y SU RELACIN CON EL USO DE LA TIERRA EN LA

    E-print Network

    Nacional de San Luis, Universidad

    163 Capítulo 7 SERVICIOS HÍDRICOS DE LOS ECOSISTEMAS Y SU RELACIÓN CON EL USO DE LA TIERRA EN LA discuten la relación entre la generación de servicios hídricos de los ecosistemas (provisión de agua y Espinal, existen evidencias de ecosistemas similares en Australia, África y Norteamérica que sugieren que

  7. Experimentos en columnaExperimentos en columna con aporte de materialcon aporte de material

    E-print Network

    Politècnica de Catalunya, Universitat

    . Mejora de la calidad del agua debida a procesos: Físicos Químicos Microbiolígicos Principales... #12;¿Por qué las columnas? #12;Objetivo proyecto ENSAT: Mejora del SAT para renaturalización de aguas) ·Cubiertas con papel aluminio. ·Agua de entrada del Llobregat. #12;Metodología 3-Muestreo y parámetros

  8. Impactos del Huracn Isaac en la calidad del agua en Luisiana con MODIS 250m

    E-print Network

    Gilbes, Fernando

    1 Impactos del Huracán Isaac en la calidad del agua en Luisiana con MODIS 250m Thais J. Alicea lluvias. Por tal razón se quiere estudiar la calidad del agua en el delta del río Mississippi antes imágenes en ENVI. Palabras clave: Calidad del agua, ENVI, Isaac, Luisiana, MODIS

  9. Tratamiento pasivo de aguas cidas de mina con caliza y MgO

    E-print Network

    Politècnica de Catalunya, Universitat

    de lodos piríticos 200m Pozo de desagüe #12;Lugar de estudio (III): Calidad del agua de mina · pH: 2Tratamiento pasivo de aguas ácidas de mina con caliza y MgO: Resultados de los ensayos de campo en debajo de la balsa de lodos Toma de agua Decantador de salida del bidón B Decantador de salida del bidón

  10. Patch Time Allocation by a Parasitoid: The Influence of Con-specifics, Host Abundance and Distance

    E-print Network

    Patch Time Allocation by a Parasitoid: The Influence of Con-specifics, Host Abundance and Distance to the Patch Juan C. Corley & José M. Villacide & Saskya van Nouhuys Revised: 20 April 2010 /Accepted: 10 August 2010 / Published online: 27 August 2010 # Springer Science+Business Media, LLC 2010 Abstract Patch

  11. El estudio NCI-MATCH vinculará medicamentos dirigidos para el cáncer con anomalías genéticas

    Cancer.gov

    Los investigadores del estudio a nivel nacional NCI-MATCH: Análisis molecular para la elección de tratamientos, anunciaron que el estudio busca determinar la eficacia de los tratamientos dirigidos en personas con tumores que presentan mutaciones genéticas específicas independientemente de su tipo de cáncer.

  12. CHILES Con Pol: An ultra-deep JVLA survey probing galaxy evolution and cosmic magnetism

    NASA Astrophysics Data System (ADS)

    Hales, Christopher A.; Momjian, Emmanuel; van Gorkom, Jacqueline; Rupen, Michael P.; Greiner, Maksim; Ensslin, Torsten A.; Bonzini, Margherita; Padovani, Paolo; Harrison, Ian; Brown, Michael L.; Gim, Hansung; Yun, Min S.; Maddox, Natasha; Stewart, Adam; Fender, Rob P.; Tremou, Evangelia; Chomiuk, Laura; Peters, Charee; Wilcots, Eric M.; Lazio, Joseph

    2015-08-01

    We are undertaking a 1000 hour campaign with the Karl G. Jansky VLA to survey 0.2 square degrees of the COSMOS field in full polarization continuum at 1.4 GHz. Our observations are part of a joint program with the spectral line COSMOS HI Large Extragalactic Survey (CHILES). When complete, we expect our CHILES Continuum Polarization (CHILES Con Pol) survey to reach an SKA-era sensitivity of 500 nJy per 4 arcsecond resolving beam, the deepest view of the radio sky yet. CHILES Con Pol will open new and fertile parameter space, with sensitivity to star formation rates of 10 Msun per year out to an unprecedented redshift of z=2, and ultra-luminous infrared galaxies and sub-millimeter galaxies out to redshifts of z=8 and beyond. This rich resource will extend the utility of radio band studies beyond the usual radio quasar and radio galaxy populations, opening sensitivity to the starforming and radio-quiet AGN populations that form the bulk of extragalactic sources detected in the optical, X-ray, and infrared bands. In this talk I will outline the key science of CHILES Con Pol, including galaxy evolution and novel measurements of intergalactic magnetic fields. I will present initial results from the first 180 hours of the survey and describe our forthcoming Data Release 1. I invite the astronomical community to consider unique science that can be pursued with CHILES Con Pol radio data.

  13. In collaborazione con: 3,2,1...IGNITION!Il lancio del satellite Lisa Pathfinder

    E-print Network

    Moschitti, Alessandro

    IMG>©ESA In collaborazione con: 3,2,1...IGNITION!Il lancio del satellite Lisa Pathfinder e l'esplorazione dello spazio-tempo PRESENTAZIONE DELLA MISSIONE SPAZIALE LISA PATHFINDER Giovedì 26 novembre ore 18 spaziale Lisa Pathfinder e docente del Dipartimento di Fisica dell'Università di Trento Sessione Domande

  14. pag. 1S. Marsili-Libelli: Introduzione ai Fuzzy Sets Ragionamento approssimato con

    E-print Network

    precisione o il significato? #12;pag. 3S. Marsili-Libelli: Introduzione ai fuzzy sets Valori Crisp e Fuzzy il grado di somiglianza Il ragionamento "crisp" opera solamente con i concetti di uguale o diverso nelle scatole verdi crisp fuzzy Numeri reali 1 0 Concetto: Numeri reali R Crisp set Fuzzy set

  15. Analisis de Opiniones con Ontologias Enrique Valles Balaguer, Paolo Rosso, Angela Locoro y Viviana Mascardi

    E-print Network

    Rosso, Paolo

    decisiones, puesto que con ella se tendr´an m´as bases sustentables para poder decidir cu´ales son los pasos donde poder dar sus opiniones, positivas o negativas sobre cualquier producto o servicio. Las´on de analizar los medios de comunicaci´on sociales, para obtener la informaci´on adecuada para

  16. ConSens: Consistency-Sensitive Opportunistic Data Access in Wireless Networks

    E-print Network

    Lim, Sunho

    services and information wirelessly. For example, smart cell phone is receiving a great attention in 2010 [1]. 47% and 40% of all adult Americans are the wireless Internet users with laptop and cell phoneConSens: Consistency-Sensitive Opportunistic Data Access in Wireless Networks Sunho Lim and Yumin

  17. which settles the debate about the exclusiveness of memory con-solidation during sleep.

    E-print Network

    which settles the debate about the exclusiveness of memory con- solidation during sleep. In describing the findings regarding procedural memory and sleep in humans, Walker states that the evidence & Born 1999a]) as well as different manipulation techniques (e.g., early versus late sleep [Plihal & Born

  18. owi'3:%l OORNL/CON-75 Effect of Forced Ventilation on

    E-print Network

    Oak Ridge National Laboratory

    owi'3:%l OORNL/CON-75 Effect of Forced Ventilation on House Infiltration *CARBIDE W. P. Levins #12-eng-26 Energy Division EFFECT OF FORCED VENTILATION ON HOUSE INFILTRATION W. P. Levins DEPARTMENT 1980). v #12;EFFECT OF FORCED VENTILATION OF HOUSE INFILTRATION W. P. Levins Energy Division ABSTRACT

  19. Reapertura del Teatro del Pueblo:´Unir la belleza con la resistencia´

    E-print Network

    Castillo, Marí a

    1996-10-01

    . Venimos a concretar un proyecto con el que soñamos: un centro de cultura al servicio de la sociedad." Más representativas aún son las palabras de Roberto Cossa quien se hace portavoz de los emprendedores de esta nueva empresa: "Los protagonistas del...

  20. 40 CFR 227.27 - Limiting permissible con-cen-tra-tion (LPC).

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 40 Protection of Environment 26 2013-07-01 2013-07-01 false Limiting permissible con-cen-tra-tion (LPC). 227.27 Section 227.27 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) OCEAN DUMPING CRITERIA FOR THE EVALUATION OF PERMIT APPLICATIONS FOR OCEAN DUMPING OF MATERIALS Definitions § 227.27 Limiting...

  1. Non Invasive Biomedical Analysis - Breath Networking Session at PittCon 2011, Atlanta, Georgia

    EPA Science Inventory

    This was the second year that our breath colleagues organized a networking session at the Pittsburgh Conference and Exposition or ''PittCon'' (http://www.pincon.org/).This time it was called "Non-invasive Biomedical Analysis" to broaden the scope a bit, but the primary focus rema...

  2. Onion Routing Access Con gurations Paul F. Syverson, Michael G. Reed, and David M. Goldschlag

    E-print Network

    Onion Routing Access Con gurations Paul F. Syverson, Michael G. Reed, and David M. Goldschlag Naval Research Laboratory Abstract Onion Routing is an infrastructure for private com- munication over and tra c analysis. Thus it hides not only the data being sent, but who is talking to whom. Onion Routing

  3. Science for conServation 293 Loss of genetic diversity and

    E-print Network

    Jamieson, Ian

    Science for conServation 293 Loss of genetic diversity and inbreeding in New Zealand's threatened bird species #12;Loss of genetic diversity and inbreeding in New Zealand's threatened bird species Ian and robins show inbreeding avoidance? 15 5. Loss of genetic diversity in New Zealand endemics 17 5.1 Genetic

  4. Annotating Web Images using NOVA: NOn-conVex group College of Computer Science,

    E-print Network

    Rui, Yong

    Annotating Web Images using NOVA: NOn-conVex group spArsity Fei Wu College of Computer Science, NOVA is the first to introduce non-convex penalty for group selection in high-dimensional heterogeneous it uses non-convex penalty, it achieves the consistency. We demonstrate the superior performance of NOVA

  5. nature genetics advance online publication 1 Genomic and proteomic approaches can provide hypotheses con-

    E-print Network

    Campbell, A. Malcolm

    provide the first global evidence that genes with similar expression profiles are more likely to encode that groups of genes that are co-expressed are likely to mediate related bio- logical functions. Similarly hypotheses con- cerning function for the large number of genes predicted from genome sequences1­5. Because

  6. Abstract Sex allocation theory predicts that parents should bias investment toward the offspring sex that con-

    E-print Network

    Casto, Joseph M.

    Abstract Sex allocation theory predicts that parents should bias investment toward the offspring sex that con- fers higher relative fitness on the parents. When variance in reproductive success reproductive allocation toward sons. Modification of the primary sex ratio is one mechanism by which avian

  7. Violación del Principio de Equivalencia en Teorías con Dilatón de Cuerdas

    NASA Astrophysics Data System (ADS)

    Landau, S. J.; Sisterna, P. D.; Vucetich, H.

    Se estudian las violaciones al Principio de Equivalencia en Teorías con Dilatón de Cuerdas. En estos modelos, algunas de las constantes fundamentales dependen del espacio y del tiempo. Se muestra que los experimentos de caída libre no tienen aún precisión como para poner límites a los parámetros de la teoría.

  8. INVESTIGATION OF THE PHYSICAL CONDITIONS CON-TROLLING SPAWNING OF OYSTERS AND THE OCCUR-

    E-print Network

    INVESTIGATION OF THE PHYSICAL CONDITIONS CON- TROLLING SPAWNING OF OYSTERS AND THE OCCUR- RENCE, DISTRIBUTION, AND SETTING OF OYSTER LARV.IE IN MILFORD HARBOR, CONNECTICUT ~ By HERBERT F. PRYTHERCH Assistant of the oyster_ 432 Time of spawning _ 433 Occurrence and distribution of larvre_ 435 Setting _ 450 Predicting

  9. Matemtica para ubicarse En cualquier lugar del planeta y ms all con el GPS

    E-print Network

    Groisman, Pablo

    Matemática para ubicarse En cualquier lugar del planeta y más allá con el GPS matbaires 09 Pablo Groisman Dpto. de Matemática FCEN-UBA CONICET #12; ¿Qué es GPS? #12; Aplicaciones #12 corrección de errores para los GPS. Reloj atómico que marca la hora oficial de EEUU. (In) presición: 1

  10. Encaminamiento Inter-Dominio con Calidad de Servicio basada en una Arquitectura Overlay y QBGP

    E-print Network

    Masip Bruin, Xavier

    Encaminamiento Inter-Dominio con Calidad de Servicio basada en una Arquitectura Overlay y QBGP , Marilia Curado2 , Jordi Domingo-Pascual1, Josep Solé-Pareta1 1 Departament d'Arquitectura de Computadors de Servicio (QoS). Nuestro enfoque consiste en proporcionar una Arquitectura Overlay completamente

  11. UNA ARQUITECTURA SEGMENTADA PARA EL CLCULO DEL TIEMPO AL IMPACTO CON VISIN LOG-POLAR

    E-print Network

    Valencia, Universidad de

    UNA ARQUITECTURA SEGMENTADA PARA EL CÁLCULO DEL TIEMPO AL IMPACTO CON VISIÓN LOG-POLAR Jose A comunicación presenta una arquitectura segmentada basada en lógica reconfigurable para procesamiento de imágenes a alta velocidad. La arquitectura está orientada a la optimización de algoritmos diferenciales de

  12. Laboratorio de Arquitecturas Avanzadas con Cell y PlayStation 3

    E-print Network

    Valencia, Universidad de

    Laboratorio de Arquitecturas Avanzadas con Cell y PlayStation 3 Fernando Pardo y Jose A. Boluda arquitectónicas utilizadas hoy en día en computación, como la arquitectura SIMD, multicomputadores en chip, o la tradicional SISD superescalar. Constituye por tanto una buena plataforma para la enseñanza de arquitecturas

  13. 9/26/2014 Recargar el iPhone con aire ser posible? | Informacion Celulares [VC] http://viciodeciudad.com.ar/recargar-el-iphone-con-aire-sera-posible/celulares-informacion/ 1/3

    E-print Network

    Chiao, Jung-Chih

    9/26/2014 ¿Recargar el iPhone con aire será posible? | Informacion Celulares [VC] http://viciodeciudad.com.ar/recargar-el-iphone-con-aire-sera-posible/celulares-informacion/ 1/3 INFORMACIONCELULARES[VC] TRUCOS&SOPORTETECNICO[MC] « App de fotos para tu telefono. Jaws Revenge para Android » Para Celulares

  14. Hacia el consumo informado de tabaco en México: efecto de las advertencias con pictogramas en población fumadora

    PubMed Central

    Thrasher, James F; Pérez-Hernández, Rosaura; Arillo-Santillán, Edna; Barrientos-Gutiérrez, Inti

    2015-01-01

    Resumen Objetivo Evaluar el efecto de las advertencias sanitarias (AS) con pictogramas en las cajetillas de tabaco en adultos fumadores. Material y métodos Cohorte de fumadores con representatividad poblacional de siete ciudades mexi canas, antes (2010) y después (2011) de la implementación de AS con pictogramas (ASP). Para determinar el cambio en las variables sobre el impacto cognitivo y conductual de las advertencias, se estimaron modelos bivariados y ajustados de ecuaciones de estimación generalizada. En el Segundo levantamiento (2011), se estimaron modelos para determiner los factores que se asocian con el reporte de recordar cada advertencia que había entrado al mercado, además de los factores asociados con el autorreporte del impacto de cada advertencia vigente. Resultados Se observaron incrementos importantes de 2010 a 2011 en los conocimientos sobre los riesgos de fumar, los componentes tóxicos del tabaco y el número telefónico para recibir consejos sobre dejar de fumar. La recordación e impacto de las primeras advertencias con pictogramas parecen ser amplios y equitativos a través de la población fumadora. En comparación con 2010, un mayor nivel de ex fumadores entrevistados en 2011 reportaron que las advertencias habían influido mucho en dejar de fumar (RM=2.44, 95% IC 1.27–4.72). Conclusiones Las AS con pictogramas han logrado un impacto importante en el conocimiento y conducta, información relevante para la población y en tomadores de decisiones. PMID:22689162

  15. A brief guide to access the Wound Healing and Management (WHAM) Node via JBI COnNECT+

    E-print Network

    Mucina, Ladislav

    A brief guide to access the Wound Healing and Management (WHAM) Node via JBI COnNECT+ To access JBI COnNECT+ and the Wound Healing and Management Node go to JBI Homepage at http and password are both the same word: - wound. #12; To go directly to the Wound Healing and Management Node

  16. 76 FR 54533 - Pipeline Safety: Issuance of Draft Decision on GexCon US, Inc. Petition for Approval of Flame...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-09-01

    ...Decision on GexCon US, Inc. Petition for Approval of Flame Acceleration Simulator AGENCY: Pipeline and Hazardous Materials Safety...Decision on GexCon US, Inc.'s petition for approval of Flame Acceleration Simulator (FLACS). The Draft Decision is available...

  17. 22 giugno 2007 00101 Marcare con una crocetta le risposte ritenute corrette e consegnare la scheda al termine della prima

    E-print Network

    Frosini, Patrizio

    reali 4 × 4 con determinante uguale a 1 `e un gruppo rispetto alla usuale operazione di prodotto righe operazioni di somma e prodotto. D) l'insieme dei numeri reali negativi `e un anello rispetto alle usuali operazioni di somma e prodotto. 2) Siano A, B e C tre matrici reali n × n con determinante uguale a 2. Allora

  18. 13 gennaio 2006 00101 Marcare con una crocetta le risposte ritenute corrette e consegnare la scheda al termine della prima

    E-print Network

    Frosini, Patrizio

    reali 4 × 4 `e un gruppo rispetto alla usuale operazione di prodotto righe per colonne. B) l'insieme di commutativo rispetto alla usuale operazione di somma. C) l'anello dei polinomi a coefficienti reali (con le matrici reali n × n simmetriche con determinante uguale a 1. Allora A) t (2A · B) `e una matrice regolare

  19. Metal Oxide Laser Ioniza2on Mass Spectrometry for the Direct Profiling of Pyrolysis Oil Cons2tuents

    E-print Network

    of Pyrolysis Oil Cons2tuents Casey R. McAlpin and Kent J. Voorhees Colorado School from the anoxic pyrolysis of biomass (py-oils) represent a promising, renewable: ·MOLI MS produces profiles of pyrolysis oil consGtuents without separa

  20. 76 FR 54533 - Pipeline Safety: Issuance of Draft Decision on GexCon US, Inc. Petition for Approval of Flame...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-09-01

    ... Statement in the Federal Register published on April 11, 2000 (65 FR 19477) or visit http://www.regulations...Con US, Inc. Petition for Approval of Flame Acceleration Simulator AGENCY: Pipeline and Hazardous... a Draft Decision on GexCon US, Inc.'s petition for approval of Flame Acceleration Simulator...

  1. Probing of Brain States in Real-Time: Introducing the ConSole Environment.

    PubMed

    Hartmann, Thomas; Schulz, Hannah; Weisz, Nathan

    2011-01-01

    Recent years have seen huge advancements in the methods available and used in neuroscience employing EEG or MEG. However, the standard approach is to average a large number of trials for experimentally defined conditions in order to reduce intertrial-variability, i.e., treating it as a source of "noise." Yet it is now more and more accepted that trial-to-trial fluctuations bear functional significance, reflecting fluctuations of "brain states" that predispose perception and action. Such effects are often revealed in a pre-stimulus period, when comparing response variability to an invariant stimulus. However such offline analyses are disadvantageous as they are correlational by drawing conclusions in a post hoc-manner and stimulus presentation is random with respect to the feature of interest. A more direct test is to trigger stimulus presentation when the relevant feature is present. The current paper introduces Constance System for Online EEG (ConSole), a software package capable of analyzing ongoing EEG/MEG in real-time and presenting auditory and visual stimuli via internal routines. Stimulation via external devices (e.g., transcranial magnetic stimulation) or third-party software (e.g., PsyScope X) is possible by sending TTL-triggers. With ConSole it is thus possible to target the stimulation at specific brain states. In contrast to many available applications, ConSole is open-source. Its modular design enhances the power of the software as it can be easily adapted to new challenges and writing new experiments is an easy task. ConSole is already pre-equipped with modules performing standard signal processing steps. The software is also independent from the EEG/MEG system, as long as a driver can be written (currently two EEG systems are supported). Besides a general introduction, we present benchmark data regarding performance and validity of the calculations used, as well as three example applications of ConSole in different settings. ConSole can be downloaded at: http://console-kn.sf.net. PMID:21716603

  2. Air Traffic Management Technology Demonstration-1 Concept of Operations (ATD-1 ConOps)

    NASA Technical Reports Server (NTRS)

    Baxley, Brian T.; Johnson, William C.; Swenson, Harry; Robinson, John E.; Prevot, Thomas; Callantine, Todd; Scardina, John; Greene, Michael

    2012-01-01

    The operational goal of the ATD-1 ConOps is to enable aircraft, using their onboard FMS capabilities, to fly Optimized Profile Descents (OPDs) from cruise to the runway threshold at a high-density airport, at a high throughput rate, using primarily speed control to maintain in-trail separation and the arrival schedule. The three technologies in the ATD-1 ConOps achieve this by calculating a precise arrival schedule, using controller decision support tools to provide terminal controllers with speeds for aircraft to fly to meet times at a particular meter points, and onboard software providing flight crews with speeds for the aircraft to fly to achieve a particular spacing behind preceding aircraft.

  3. Medición de placas astrométricas obtenidas con el telescopio Astrográfico de La Plata

    NASA Astrophysics Data System (ADS)

    di Sisto, R. P.; Orellana, R.

    El Observatorio de La Plata cuenta con un gran número de placas de asteroides y cometas obtenidas con el telescopio astrográfico, que cubren gran parte del cielo del hemisferio sur. En 1996 se recopilaron y clasificaron 2187 placas (Beca para estudiantes de la AAA 1996) de las cuales 2031 corresponden a asteroides. Los datos de cada placa se volcaron en una base de datos creada para facilitar su manejo y preservar la información. A partir de este trabajo se revisaron los MPC electrónicos y se identificaron aquellas placas de asteroides pertenecientes a nuestra base de datos cuyos resultados no fueron publicados en los mismos. De un total de 400 placas que no aparecían publicadas sobresalía un paquete constituído por 40 placas obtenidas en 1977. Estas últimas fueron reducidas utilizando las posiciones y movimientos propios de las estrellas de referencia obtenidas del catálogo SAO 2000 dadas para el sistema FK5. Las posiciones calculadas fueron enviadas y publicadas en los Minor Planet Circulars (MPC).

  4. RETOS EN LA INTERVENCIÓN CON ADOLESCENTES PUERTORRIQUEÑOS/AS QUE MANIFIESTAN COMPORTAMIENTO SUICIDA*

    PubMed Central

    Vélez, Yovanska Duarté; Dávila, Paloma Torres; Hernández, Samariz Laboy

    2015-01-01

    Presentamos un estudio de caso de una adolescente puertorriqueña con comportamiento suicida. Esta comenzó una Terapia Socio Cognitivo-Conductual para el Comportamiento Suicida (TSCC-CS) de tipo ambulatorio luego de una hospitalización por intento suicida. La TSCC-CS incorpora una perspectiva ecológica y de desarrollo a la terapia cognitivo-conductual. Inicialmente mostró baja autoestima y severos síntomas depresivos y de ansiedad. Al finalizar el tratamiento, manifestó un cambio significativo en su sintomatología clínica y evidenció una mejoría en sus destrezas de manejo. No presentó ideas suicidas durante meses previos, ni durante el seguimiento. El análisis de este caso permitió realizar cambios en el protocolo de tratamiento, particularmente en las sesiones de familia y de comunicación con el fin de aumentar la viabilidad del tratamiento. PMID:26702337

  5. Ms informacon: http://cv1.cpd.ua.es/ConsPlanesEstudio/cvFi-

    E-print Network

    Escolano, Francisco

    Más informacíon: http://cv1.cpd.ua.es/ConsPlanesEstudio/cvFi- chaAsiEEES.asp?wCodEst=C053&wcodasi=2 6048&wLengua=C&scaca=2012-13 Departamento de Química Física Correo electrónico: dqfis@ua.es Teléfono: 965903536 Página web: http://dqf.ua.es/es/ Diseño:GabinetedeImagenyComunicaciónGráficadelaUniversidaddeAlicante.Impressió:imprenta.ua

  6. Disfrute del sol con cuidado -- Cualquier persona puede padecer cáncer de piel

    Cancer.gov

    Está bien pasar algún tiempo al aire libre, pero usted debe saber que las personas de piel más oscura –incluso muchos hispanos o latinos– tienen riesgo de padecer cáncer de piel. Siempre que pueda, evite exponerse al sol, especialmente entre las 10 a.m. y las 4 p.m., cuando los rayos del sol son más fuertes. Si trabaja o juega al aire libre, cúbrase y protéjase la piel con prendas de vestir, sombreros, lentes, filtros solares.

  7. TABELLE DI PROGRAMMAZIONE FABBISOGNO DI PERSONALE RICERCATORI CON CONTRATTO A TEMPO DETERMINATO

    E-print Network

    Di Pillo, Gianni

    TABELLE DI PROGRAMMAZIONE FABBISOGNO DI PERSONALE RICERCATORI CON CONTRATTO A TEMPO DETERMINATO: a tempo pieno 0 0 0,00% a tempo definito 0 0 0,00% Totale 0 0 0,00% RICERCATORI 15 737.580 0,15% di cui: a tempo pieno 15 737.580 0,15% a tempo definito 0 0 0,15% Totale 15 737.580 0,15% RICERCATORI 122 6

  8. Functional characterization of Con A-responsive Lyt2-positive mouse small intestinal intraepithelial lymphocytes.

    PubMed Central

    Dillon, S B; MacDonald, T T

    1986-01-01

    The surface phenotypes of resting vs Con A-stimulated intraepithelial lymphocytes (IEL) from mouse small intestine were directly determined by immunofluorescence with double labelling. Both Thy 1.2+, Lyt 2+ and Thy 1.2+ Lyt 2- IEL underwent blastogenesis and expressed interleukin-2 (IL-2) receptors. The Lyt 2+ subsets of IEL (which represent 80% of the total cells) were isolated by panning and shown to proliferate in response to Con A and IL-2, although the frequency of responsive precursors was dramatically lower than that seen in the splenic Lyt 2+ T-cell population (1 in 500 vs 1 in 8, respectively). Con A-stimulated Lyt 2+ IEL produced lymphokines supporting the growth of the interleukin-3 (IL-3)-dependent cell line DA-1, and of the FDC-P2 cell line that proliferates in response to both IL-3 and GM-CSF. The results therefore support the possibility that Lyt 2+ IEL act as inducers of local cell-mediated immune reactions by producing haematopoietic lymphokines. PMID:3098677

  9. Mound-ACT*DE*CON{sup SM} feasibility study. Phase 2: Final report

    SciTech Connect

    1994-12-01

    A portion of the abandoned Miami-Erie Canal paralleling the Greater Miami River receives the runoff and storm-water discharge from Mound Laboratory. In 1969, a low-level plutonium leak contaminated sediment as far away as 1.5 mi from the Mound site along the old canal system. An estimated one million cubic feet of sediment requires remediation. The technology being evaluated for the remediation of the low-level plutonium-238 contamination of the sediment involves two processes: washing the sediments with ACT*DE*CON{sup SM} solution to dissolve the contaminant, followed by extraction of the solution and processing with the MAG*SEP{sup SM} process to concentrate the contaminant and allow reuse of the ACT*DE*CON{sup SM} solution. The processes are being optimized for pilot-scale and field demonstration. Phase 2 of the project primarily involved identification at the laboratory scale of the optimal ACT*DE*CON{sup SM} formulation, identification of the ion-exchanger and MAG*SEP{sup SM} particles, verification of the plutonium mobility in the treated soil, and evaluation of other process parameters according to a series of tasks.

  10. ConPADE: Genome Assembly Ploidy Estimation from Next-Generation Sequencing Data

    PubMed Central

    Margarido, Gabriel R. A.; Heckerman, David

    2015-01-01

    As a result of improvements in genome assembly algorithms and the ever decreasing costs of high-throughput sequencing technologies, new high quality draft genome sequences are published at a striking pace. With well-established methodologies, larger and more complex genomes are being tackled, including polyploid plant genomes. Given the similarity between multiple copies of a basic genome in polyploid individuals, assembly of such data usually results in collapsed contigs that represent a variable number of homoeologous genomic regions. Unfortunately, such collapse is often not ideal, as keeping contigs separate can lead both to improved assembly and also insights about how haplotypes influence phenotype. Here, we describe a first step in avoiding inappropriate collapse during assembly. In particular, we describe ConPADE (Contig Ploidy and Allele Dosage Estimation), a probabilistic method that estimates the ploidy of any given contig/scaffold based on its allele proportions. In the process, we report findings regarding errors in sequencing. The method can be used for whole genome shotgun (WGS) sequencing data. We also show applicability of the method for variant calling and allele dosage estimation. Results for simulated and real datasets are discussed and provide evidence that ConPADE performs well as long as enough sequencing coverage is available, or the true contig ploidy is low. We show that ConPADE may also be used for related applications, such as the identification of duplicated genes in fragmented assemblies, although refinements are needed. PMID:25880203

  11. Con-T[M8Q] potently attenuates the expression and development of morphine tolerance in mice.

    PubMed

    Ren, Baolan; Zhou, Zhijie; Liu, Zhuguo; Li, Bailin; Ou, Jie; Dai, Qiuyun

    2015-06-15

    As a variant of peptide conantokin-T (con-T), con-T[M8Q] is derived from the venom of Conus tulipa. Our previous study has demonstrated that con-T[M8Q] selectively targets N-methyl-d-aspartate receptor (NMDAR) NR2B subunit. In the present study, we determined the effects of con-T[M8Q] on the expression and development of morphine tolerance using hot plate test and acetic acid writhing test. Our results demonstrated that con-T[M8Q] could efficiently attenuate the expression and development of morphine analgesic tolerance in mice at low doses (5-20nmol/kg), and it exhibited more potent effects compared with ifenprodil, a typical small-molecule antagonist of NMDAR. In addition, low doses of con-T[M8Q] (5-20nmol/kg) did not cause drug resistance and apparent analgesic activity compared with morphine. Taken together, con-T[M8Q] could be a promising new candidate in attenuating morphine tolerance. PMID:25896730

  12. 32 Wesley C. Salmon -it has been appropriate to deny that such appeals to functions involve the con-

    E-print Network

    Fitelson, Branden

    32 Wesley C. Salmon -it has been appropriate to deny that such appeals to functions involve the con's (1962) defense of deductive explanation in her contribution to the third volume #12;34 Wesley C. Salmon

  13. C ALCULO Y DISE ~NO ASISTIDO POR ORDENADOR DE TOMAS DE TIERRA CON MODELOS DE SUELO NO UNIFORMES

    E-print Network

    Colominas, Ignasi

    y de Representacion Escuela Tecnica Superior de Ingenieros de Caminos, Canales y Puertos Universidad Elementos de Con- torno desarrollada por los autores [4] ha permitido identi#12;car esta familia de metodos

  14. Estudio de NIH señala relación de la TC en la infancia con leucemia y cáncer de cerebro más tarde

    Cancer.gov

    Niños y adultos jóvenes a quienes se les hicieron exploraciones muchas veces con tomografía computarizada (TC), una herramienta de diagnóstico de uso frecuente, tienen un riesgo ligeramente mayor de padecer leucemia y tumores cerebrales en la década poste

  15. The Credibility Revolution in Empirical Economics: How Better Research Design is Taking the Con out of Econometrics

    E-print Network

    Angrist, Joshua

    2010-01-01

    Just over a quarter century ago, Edward Leamer (1983) reflected on the state of empirical work in economics. He urged empirical researchers to “take the con out of econometrics” and memorably observed (p. 37): “Hardly ...

  16. Timing and Tectonic implications of basin inversion in the Nam Con Son Basin and adjacent areas, southern South China Sea 

    E-print Network

    Olson, Christopher Charles

    2001-01-01

    The Nam Con Son (NCS) Basin, located offshore of SE Vietnam, is one of several Tertiary rift basins that formed during initial Eocene(?)-Oligocene rifting. Following cessation of rifting at the end of Oligocene time, these basins were subjected...

  17. AUTORIZACIN PARA LA REVELACIN DE LA INFORMACIN DE SALUD CONFORME CON LA LEY HIPAA Nombre del paciente Fecha de nacimiento Numero del Expediente

    E-print Network

    Columbia University

    AUTORIZACIÓN PARA LA REVELACIÓN DE LA INFORMACIÓN DE SALUD CONFORME CON LA LEY HIPAA Nombre del, solicito(a) que la información de salud con respect a mi cuidado y tratamiento se revele según se establece relacionada con el USO EXCESIVO DE ALCOHOL Y CONSUMO DE DROGRAS, TRATAMIENTO PARA LA SALUD MENTAL, except las

  18. Impostazioni Google Apps con client Mail di Apple Mac per l'account di fantasia pinco.panco@uniroma1.it

    E-print Network

    Di Pillo, Gianni

    Impostazioni Google Apps con client Mail di Apple Mac per l'account di fantasia pinco è ospitato sui server google.com) #12;Impostazioni Google Apps con client Mail di Apple Mac per l Google Apps con client Mail di Apple Mac per l'account di fantasia pinco.panco@uniroma1.it Pag. 3

  19. Presentación del estudio “Links” de hombres que tienes sexo con hombres en Buenos Aires, Argentina

    PubMed Central

    Carballo-Diéguez, Alex; Ávila, María M; Balán, Iván C.; Marone, Rubén; Pando, María A.; Barreda, Victoria

    2011-01-01

    Resumen Estudios previos en Buenos Aires reportaron altas prevalencias de HIV entre HSH, con valores que oscilan entre 9 y 14% durante casi 10 años de continuo testeo. El objetivo principal de este estudio fue la evaluación de factores relacionados al comportamiento de alto riesgo para transmisión del HIV entre HSH entre los que se incluyen el conocimiento y factores emocionales, socioculturales y ambientales. Por otro lado se realizó la estimación de prevalencia e incidencia de HIV utilizando RDS (Respondent Driven Sampling), así como la presencia de otras infecciones de transmisión sexual. Por último se evaluaron los hábitos de testeo para HIV indagando que factores facilitan o impiden su realización. El estudio constó de dos fases, en primer lugar una fase cualitativa y posteriormente una fase cuantitativa con una duración total de 4 años y medio. Durante la fase cualitativa se realizaron 44 entrevistas individuales en profundidad, 8 grupos focales y 10 observaciones etnográficas (hoteles, baños públicos (“teteras”), cines pornográficos, fiestas privadas, dark rooms y discotecas). Durante la fase cuantitativa del estudio se realizó el reclutamiento de 500 participantes que provinieron de la Ciudad Autónoma de Buenos Aires, así como del Gran Buenos Aires. El reclutamiento se comenzó con 16 participantes llamados semillas. Se realizó el diagnóstico de infección por HIV, hepatitis B y C (HBV y HCV), Treponema pallidum, Virus Papiloma Humano (HPV) y Chlamidias. La colaboración establecida entre los grupos de trabajo enfocados en áreas diversas posibilitó el abordaje conjunto de nuevas estrategias de investigación antes no exploradas en nuestro país. Los resultados más relevantes de esta investigación serán progresivamente publicados en sucesivos números de Actualizaciones en SIDA. PMID:25264397

  20. Presentación del estudio "Links" de hombres que tienes sexo con hombres en Buenos Aires, Argentina.

    PubMed

    Carballo-Diéguez, Alex; Avila, María M; Balán, Iván C; Marone, Rubén; Pando, María A; Barreda, Victoria

    2011-03-01

    Estudios previos en Buenos Aires reportaron altas prevalencias de HIV entre HSH, con valores que oscilan entre 9 y 14% durante casi 10 años de continuo testeo. El objetivo principal de este estudio fue la evaluación de factores relacionados al comportamiento de alto riesgo para transmisión del HIV entre HSH entre los que se incluyen el conocimiento y factores emocionales, socioculturales y ambientales. Por otro lado se realizó la estimación de prevalencia e incidencia de HIV utilizando RDS (Respondent Driven Sampling), así como la presencia de otras infecciones de transmisión sexual. Por último se evaluaron los hábitos de testeo para HIV indagando que factores facilitan o impiden su realización. El estudio constó de dos fases, en primer lugar una fase cualitativa y posteriormente una fase cuantitativa con una duración total de 4 años y medio. Durante la fase cualitativa se realizaron 44 entrevistas individuales en profundidad, 8 grupos focales y 10 observaciones etnográficas (hoteles, baños públicos ("teteras"), cines pornográficos, fiestas privadas, dark rooms y discotecas). Durante la fase cuantitativa del estudio se realizó el reclutamiento de 500 participantes que provinieron de la Ciudad Autónoma de Buenos Aires, así como del Gran Buenos Aires. El reclutamiento se comenzó con 16 participantes llamados semillas. Se realizó el diagnóstico de infección por HIV, hepatitis B y C (HBV y HCV), Treponema pallidum, Virus Papiloma Humano (HPV) y Chlamidias. La colaboración establecida entre los grupos de trabajo enfocados en áreas diversas posibilitó el abordaje conjunto de nuevas estrategias de investigación antes no exploradas en nuestro país. Los resultados más relevantes de esta investigación serán progresivamente publicados en sucesivos números de Actualizaciones en SIDA. PMID:25264397

  1. Effect of GonaCon™ vaccine on black-tailed prairie dogs: immune response and health effects.

    PubMed

    Yoder, Christi A; Miller, Lowell A

    2010-12-16

    Management of prairie dogs in the past has included poisoning, fumigants, barriers, and relocation. Because of the diverse attitudes related to prairie dog management, nonlethal methods that allow the existence of prairie dogs but help minimize damage related to population growth need to be developed. GonaCon™ is an immunocontraceptive vaccine that elicits antibodies to native GnRH; this prevents the secretion of reproductive hormones necessary for sperm and oocyte production. Prairie dogs were vaccinated with 0.1, 0.2, or 0.4 mL of the GonaCon™ emulsion intramuscularly in the upper thigh containing 100, 200, or 400 ?g GnRH conjugate, respectively. Control animals were vaccinated with 0.4 mL saline emulsion in the upper thigh. Blood samples (?1 mL) were taken from the femoral vein once pretreatment and at 1, 2, 3, 4, 6, and 15 months post-vaccination. Age (adult or juvenile) did not affect immune response to GonaCon™. Antibody titers were higher in the 200 and 400 ?L GonaCon™ groups than in the 100 ?L group, and there was no difference between the 200 and 400 ?L GonaCon™ groups. No adverse effects of GonaCon™ were noted on weight or blood chemistry parameters during the study. GonaCon™ will likely contracept prairie dogs for ?1 year in the field using either 200 or 400 ?g conjugate. GonaCon™ could be incorporated into management plans to help maintain prairie dog populations while reducing habitat degradation due to overpopulation. PMID:21055491

  2. The pros and cons about the digital recording of Intangible Cultural Heritage and some strategies

    NASA Astrophysics Data System (ADS)

    Yang, H.

    2015-08-01

    Intangible Cultural Heritage (referred to as ICH), whose fundamental nature different from the tangible cultural heritage is "Intangible", and the related physical presence of the heritage is not the core content. Digital means have irreplaceable advantages in recording intangible and dynamic ICH resources, while it also needs flexible and rigorous recording means as a support, thus striving to maximize resources recording and protection. This article will focus on the pros and cons about the digital recording of ICH, and preliminarily discuss some strategies used in the process of recording.

  3. Lesbian (in)visibility in Italian Renaissance culture: Diana and other cases of donna con donna.

    PubMed

    Simons, P

    1994-01-01

    Current conceptualizations of sexual identity in the West are not necessarily useful to an historian investigating "lesbianism" in the social history and visual representations of different periods. After an overview of Renaissance documents treating donna con donna relations which examines the potentially positive effects of condemnation and silence, the paper focuses on Diana, the goddess of chastity, who bathed with her nymphs as an exemplar of female bodies preserved for heterosexual, reproductive pleasures. Yet the self-sufficiency and bodily contact sometimes represented in images of this secluded all-female gathering might suggest "deviant" responses from their viewers. PMID:7798609

  4. Colaboracion de Einstein con los grandes matematicos de la epoca en la teoria de la

    E-print Network

    Ruiz, Jesús M.

    Colaboraci´on de Einstein con los grandes matem´aticos de la ´epoca en la teor´ia de la relatividad las matem´aticas en la Teor´ia de la Relatividad. Para ello estudiaremos la recepci´on dada a dicha matem´aticas y la f´isica En la Teor´ia de la Relatividad, la din´amica matem´atica es la que indic´o el

  5. TABLe of conTenTs 2 PrePArATion And checkLisT

    E-print Network

    Gleeson, Joseph G.

    be part of other illnesses, such as bipolar (or manic-depressive) disorder, which is characterized TABLe of conTenTs 2 PrePArATion And checkLisT 3 scenArio 3 sYMPTons of cLinicAL dePression 3 signsTudenT seek MedicAL ATTenTion 7 furTher resources A guide for fAcuLTY And sTAff dePression And suicidAL Beh

  6. Perceived pros and cons of smoking and quitting in hard-core smokers: a focus group study

    PubMed Central

    2014-01-01

    Background In the last decade, so-called hard-core smokers have received increasing interest in research literature. For smokers in general, the study of perceived costs and benefits (or ‘pros and cons’) of smoking and quitting is of particular importance in predicting motivation to quit and actual quitting attempts. Therefore, this study aims to gain insight into the perceived pros and cons of smoking and quitting in hard-core smokers. Methods We conducted 11 focus group interviews among current hard-core smokers (n = 32) and former hard-core smokers (n = 31) in the Netherlands. Subsequently, each participant listed his or her main pros and cons in a questionnaire. We used a structural procedure to analyse the data obtained from the group interviews and from the questionnaires. Results Using the qualitative data of both the questionnaires and the transcripts, the perceived pros and cons of smoking and smoking cessation were grouped into 6 main categories: Finance, Health, Intrapersonal Processes, Social Environment, Physical Environment and Food and Weight. Conclusions Although the perceived pros and cons of smoking in hard-core smokers largely mirror the perceived pros and cons of quitting, there are some major differences with respect to weight, social integration, health of children and stress reduction, that should be taken into account in clinical settings and when developing interventions. Based on these findings we propose the ‘Distorted Mirror Hypothesis’. PMID:24548463

  7. Specificity of antibodies to the purified Con A acceptor glycoproteins of cultured tumour cells.

    PubMed Central

    Koch, G. L.; Smith, M. J.

    1986-01-01

    Con A acceptor glycoproteins from the human Molt 4 (T cell leukaemia) and HeLa (endocervical adenocarcinoma) cell lines were purified by affinity chromatography and used for the preparation of rat antisera. Cross-absorption analysis showed that each antiserum contained antibodies which recognised cell surface antigens preferentially expressed by the donor cell line. Molt 4-associated antigens were fully expressed on T cell tumour lines and normal thymocytes, but not on non T cell tumour lines, peripheral blood lymphocytes or other blood cells. Immunofluorescence studies showed that the antigens were preferentially expressed on a sub-population of immature thymocytes. HeLa-associated antigens were only fully expressed on one other epithelial tumour cell in a panel of 17 cell lines. Immunofluorescence studies showed that the HeLa-associated antigens were expressed on normal endocervical adenoepithelium but not on ectocervical, endometrial or intestinal epithelia. Thus purified Con A acceptor glycoproteins of cultured tumour cell lines are potent immunogens for the generation of antibodies recognising lineage-associated differentiation antigens. These antigens should be useful in tumour classification and in the study of normal differentiation. Images Figure 1 Figure 4 Figure 5 PMID:3511935

  8. Uso de Sustancias en Mujeres con Desventaja Social: Riesgo para el Contagio de VIH/SIDA

    PubMed Central

    Cianelli, R.; Ferrer, L; Bernales, M.; Miner, S.; Irarrázabal, L.; Molina, Y.

    2009-01-01

    Antecedentes La caracterización epidemiológica en Chile apunta a feminización, pauperización y heterosexualización de la epidemia del VIH, lo que implica un mayor riesgo para las mujeres en desventaja social. Si a esto se suma la utilización de sustancias, la vulnerabilidad de este grupo frente al VIH/SIDA aumenta. Objetivo Describir el uso de sustancias en mujeres con desventaja social e identificar factores de riesgo de contagio de VIH, asociados a este consumo. Material y Método 52 mujeres fueron entrevistadas como parte del proyecto “Testeando una intervención en prevención de VIH/SIDA en mujeres chilenas” GRANT # RO1 TW 006977. Se describen variables sociodemográficas y de consumo de sustancias a través de estadísticas descriptivas y se analiza la relación entre variables a través de pruebas de correlación. Resultados Los resultados indican un perfil sociodemográfico que sitúa a las mujeres en situación de vulnerabilidad frente al contagio de VIH/SIDA, con alto índice de uso de sustancias que acentúa el riesgo. Conclusiones Los hallazgos apuntan a la necesidad de considerar intervenciones que se enfoquen en la prevención de VIH en mujeres, abordando los riesgos asociados al consumo de sustancias. PMID:21197380

  9. Actitudes Éticas de los estudiantes y egresados en carrera de medicina con metodologías activas

    PubMed Central

    Novaes, Maria Rita Carvalho Garbi; Novaes, Luiz Carlos Garcez; Guilhem, Dirce; Stepke, Fernando Lolas; Silveira, Carla Cristina Costa; Komatsu, Ricardo Shoiti; Trindade, Eliane Mendonça Vilar; Guiotti, Murilo Galvão

    2010-01-01

    El presente estudio tiene por objeto desarrollar un diagnostico de la inserción integrada de la ética en la carrera de medicina brasileña con una metodología de aprendizaje basada en problemas y describir las percepciones de actitudes éticas de los estudiantes y egresados. El diseño metodológico es un estudio de caso, descriptivo y documental, con abordaje cualitativo y cuantitativo. La muestra de esta investigación ha sido constituida por 120 estudiantes y 40 egresados de dos promociones del Curso de Medicina de la ESCS. Este proyecto fue aprobado por el Comité de Ética en Investigación - SES/DF. Los estudiantes y egresados de la ESCS demostraron un buen manejo en el abordaje de los conflictos éticos y respeto a los pacientes. Sin embargo, el análisis de sensibilidad ética mostró una fragilidad en las percepciones y aptitudes inapropiadas de los estudiantes de la carrera de medicina, identificada básicamente en los años iniciales, que necesitan más discusiones sistematizadas sobre los aspectos éticos y bioéticos integrados a las actividades prácticas para estimular y fortalecer la reflexión ética de los estudiantes. PMID:20981242

  10. Cue-based assertion classification for Swedish clinical text – developing a lexicon for pyConTextSwe

    PubMed Central

    Velupillai, Sumithra; Skeppstedt, Maria; Kvist, Maria; Mowery, Danielle; Chapman, Brian E.; Dalianis, Hercules; Chapman, Wendy W.

    2014-01-01

    Objective The ability of a cue-based system to accurately assert whether a disorder is affirmed, negated, or uncertain is dependent, in part, on its cue lexicon. In this paper, we continue our study of porting an assertion system (pyConTextNLP) from English to Swedish (pyConTextSwe) by creating an optimized assertion lexicon for clinical Swedish. Methods and material We integrated cues from four external lexicons, along with generated inflections and combinations. We used subsets of a clinical corpus in Swedish. We applied four assertion classes (definite existence, probable existence, probable negated existence and definite negated existence) and two binary classes (existence yes/no and uncertainty yes/no) to pyConTextSwe. We compared pyConTextSwe’s performance with and without the added cues on a development set, and improved the lexicon further after an error analysis. On a separate evaluation set, we calculated the system’s final performance. Results Following integration steps, we added 454 cues to pyConTextSwe. The optimized lexicon developed after an error analysis resulted in statistically significant improvements on the development set (83% F-score, overall). The system’s final F-scores on an evaluation set were 81% (overall). For the individual assertion classes, F-score results were 88% (definite existence), 81% (probable existence), 55% (probable negated existence), and 63% (definite negated existence). For the binary classifications existence yes/no and uncertainty yes/no, final system performance was 97%/87% and 78%/86% F-score, respectively. Conclusions We have successfully ported pyConTextNLP to Swedish (pyConTextSwe). We have created an extensive and useful assertion lexicon for Swedish clinical text, which could form a valuable resource for similar studies, and which is publicly available. PMID:24556644

  11. Development and test of a rectangular CERN ConFlat-type flange

    E-print Network

    Miarnau Marin, Ana; Veness, Raymond

    2015-01-01

    Standard circular ConFlat® (CF) flanges are widely used in industry due to their high sealing reliability after being subjected to a bakeout process. The Beam Gas Ionisation (BGI) instrument for the CERN Proton Synchrotron accelerator will require a CF-like rectangular sealing system. Although rectangular CF-type flanges with plastically deforming metal seals have been used, no published designs with validated tests for bakeout under UHV conditions are available. Existing circular CERN CF flanges were compared and a design for a rectangular CF flange was proposed. Two prototypes were manufactured along with copper gaskets. The flanges and gaskets were cleaned and prepared for extensive vacuum testing after bakeout cycles up to 350 °C. This paper summarises the design, analysis and manufacturing process and describes the testing procedures and results. Additionally, the limitations when designing a flange of any shape were explored.

  12. Filamentary Extension of the Mem-Con theory of Memristance and its Application to Titanium Dioxide Sol-Gel Memristors

    E-print Network

    Gale, Ella; Adamatzky, Andrew

    2012-01-01

    Titanium dioxide sol-gel memristors have two different modes of operation, believed to be dependent on whether there is bulk memristance, i.e. memristance throughout the whole volume or filamentary memristance, i.e. memristance caused by the connection of conducting filaments. The mem-con theory of memristance is based on the drift of oxygen vacancies rather than that of conducting electrons and has been previously used to describe bulk memristance in several devices. Here, the mem-con theory is extended to model memristance caused by small filaments of low resistance titanium dioxide and it compares favorably to experimental results for filamentary memristance in sol-gel devices.

  13. Future of clip-on weapon sights: pros and cons from an applications perspective

    NASA Astrophysics Data System (ADS)

    Knight, C. Reed; Greenslade, Ken; Francisco, Glen

    2015-05-01

    US Domestic, International, allied Foreign National Warfighters and Para-Military First Responders (Police, SWAT, Special Operations, Law Enforcement, Government, Security and more) are put in harm's way all the time. To successfully complete their missions and return home safely are the primary goals of these professionals. Tactical product improvements that affect mission effectiveness and solider survivability are pivotal to understanding the past, present and future of Clip-On in-line weapon sights. Clip-On Weapon Sight (WS) technology was deemed an interim solution by the US Government for use until integrated and fused (day/night multi-sensor) Weapon Sights (WSs) were developed/fielded. Clip-On has now become the solution of choice by Users, Warriors, Soldiers and the US Government. SWaP-C (size, weight and power -cost) has been improved through progressive advances in Clip-On Image Intensified (I2), passive thermal, LL-CMOS and fused technology. Clip-On Weapon Sights are now no longer mounting position sensitive. Now they maintain aim point boresight, so they can be used for longer ranges with increased capabilities while utilizing the existing zeroed weapon and daysight optic. Active illuminated low-light level (both analog I2 and digital LL-CMOS) imaging is rightfully a real-world technology, proven to deliver daytime and low-light level identification confidence. Passive thermal imaging is also a real-world technology, proven to deliver daytime, nighttime and all-weather (including dirty battlefield) target detection confidence. Image processing detection algorithms with intelligent analytics provide documented promise to improve confidence by reducing Users, Warriors and Soldiers' work-loads and improving overall system engagement solution outcomes. In order to understand the future of Clip-On in-line weapon sights, addressing pros and cons, this paper starts with an overview of historical weapon sight applications, technologies and stakeholder decisions driving milestone events that helped shape the Clip-On weapon sight industry. Then, this paper systematically reviews current attributes of integrated multispectral wavelength electro-optical imaging systems that successfully (and sometimes unsuccessfully) shape today's Warrior, Soldier and User's net-capabilities. Finally, this paper explores the evolution, pros and cons, of future Clip-On weapon sights, from a manufacturing and real world applications perspective for tomorrow's military soldier and paramilitary first responder.

  14. Economic and Ethical Consequences of Natural Hazards in Alpine Valleys (EE-Con)

    NASA Astrophysics Data System (ADS)

    Ortner, Florian; Brantl, Dirk; Meyer, Lukas; Steininger, Karl; Sass, Oliver

    2015-04-01

    The Alps and their population are particularly vulnerable to geomorphological and hydrological hazards and this problem might be amplified by ongoing climate change. Natural disasters cause severe monetary damage which often leads to the difficult question whether it socially pays to protect settlements at high costs or whether alternatively settlement areas should better be abandoned. By investigations in the Johnsbachtal and the Kleinsölktal (Styria), the interdisciplinary project "Economic and Ethical Consequences of Natural Hazards in Alpine Valleys" (EE-Con), funded by the Austrian Academy of Sciences, seeks to answer the following questions: (1) Are natural hazards and associated damages in fact increasing, and is this due to meteorological triggers, to anthropogenic factors or to internal process dynamics? (2) What is the perception and knowledge of local people, how is risk and risk prevention communicated? (3) What is the respective cost ratio between protection infrastructure, soft measures of adaptation and other options (e.g. reduction of settlement area)? (4) What legitimate claims to compensation do people have, how far does societal responsibility go and where does individual responsibility start if parts of the settlement area had to be abandoned? These questions will be tackled in an interdisciplinary cooperation between geography, economics and normative theory (philosophy). EE-Con will follow broadly the path of risk analysis and risk assessment, focusing on the temporal dimension (past - present - future) with the aim to unravel the history of natural hazards in the areas and to analyse the economic values involved. In the following, natural hazard scenarios for the future (2050 and 2100) will be developed considering the economic consequences. Besides this, the project deals with local knowledge, risk perception and risk communication, which will be investigated via group interviews and stakeholder workshops and be integrated into a human-ecological model. Therefore, local people and stakeholders are going to be involved in a transdisciplinary approach from the start of the project. The geographic and economic information will then be used to find proper weighing mechanisms answering the normative questions mentioned above. The questions of enduring the respective costs and of responsibility for protecting the respective entitlements will be investigated from an ethical, a legal, and an economic viewpoint. The overall outcome of the results should provide an integrative view on the economic and ethical consequences of natural hazards in alpine valleys.

  15. Retrieval by Spatial Con guration Xin Chen a , C. P. Lam b and W. F. Smyth c d

    E-print Network

    Smyth, William F.

    1 Retrieval by Spatial Con#12;guration Xin Chen a , C. P. Lam b and W. F. Smyth c d a IBM Toronto be distributed easily and cheaply. Increasingly, it is vital to be able to retrieve digital images from collections as many more application areas such as the miltary, geographical imformation systems

  16. Adding Photos Lightbox GalleryCon nued 1 .Toad d im agestoM ood le,inyourtexted itor,

    E-print Network

    Selmic, Sandra

    Adding Photos Lightbox GalleryCon nued 1 .Toad d im agestoM ood le,inyourtexted itor, locate,create a com pressed fold er (.z ip) w ithallthe im agesyou w ould like toad d to the Lightbox Gallery. 2.W

  17. PyCon 2008: Presentation Proposal Using Python To Teach Object-Oriented Programming in CS1

    E-print Network

    Goldwasser, Michael

    PyCon 2008: Presentation Proposal Using Python To Teach Object-Oriented Programming in CS1 Michael students to grasp, and that teaching those principles takes time away from the basics that are needed in CS often introduced with a pro- cedural paradigm. For those teaching object orientation in CS1, Java

  18. -Columna Pulso Poltico -http://portal.pulsopolitico.com.mx -Reconocer la ALDF a 3 cientficos mexicanos con la Medalla al

    E-print Network

    Coello, Carlos A. Coello

    provocaría un enorme impulso, como cuando se infla un globo. Albert Einstein, creador de la Teoría de la postuló un modelo de geometría del espacio que, sin caer en contradicciones con las teorías de Albert Einstein, permitiría viajar más rápido que la velocidad de la luz. Su propuesta consiste en expandir el

  19. 0^T^^^tf^*nl~~~~ ORNL/CON-154 Nonlinear Analysis of Stirling

    E-print Network

    Oak Ridge National Laboratory

    . #12;ORNL/CON-154 Engineering Technology Division NONLINEAR ANALYSIS OF STIRLING ENGINE THERMODYNAMICS encouragement. #12;NONLINEAR ANALYSIS OF STIRLING ENGINE THERMODYNAMICS R. D. Banduric N. C. J. Chen ABSTRACT Numerical solutions to a simplified mathematical formula- tion for Stirling engine thermodynamics, including

  20. respectively, dust and sea salt aerosols; cloud liquid water and cloud ice mixing ratio; and number con-

    E-print Network

    Blanchette, Carol Anne

    con- centrations of cloud droplets and ice crystals. Trans- port, dry, and wet depositionrespectively, dust and sea salt aerosols; cloud liquid water and cloud ice mixing ratio; and number, but instead will likely cause localized ex- tinctions at a series of "hot spots." Patterns of exposure

  1. Translation of Body Surface Maps Between Di erent Electrode Con gurations Using a Three-Dimensional Interpolation Scheme 1

    E-print Network

    MacLeod, Rob S.

    Translation of Body Surface Maps Between Di erent Electrode Con gurations Using a Three-Dimensional since each involves projecting the locations of the recording electrodes, locations in three-dimensional completely general-purpose methods for interpolating functions of three dimensions3, if interpolation

  2. SITE PROGRAM APPLICATIONS ANALYSIS REPORT, INTERNATIONAL WASTE TECHNOLOGIES/GEO CON IN-SITU STABILIZATION/SOLIDIFICATION

    EPA Science Inventory

    An evaluation was performed of the International Waste Technologies (IWT) HWT-20 additive and the Geo-Con, Inc. deep-soil-mixing equipment for an in situ stabilization/solidification process and its applicability as an on-site treatment method for waste site cleanup. emonstration...

  3. 1. Introduction In a uid con ned to a plane layer and heated from below, convection can

    E-print Network

    Rucklidge, Alastair

    1. Introduction In a uid con#12;ned to a plane layer and heated from below, convection can occur of convective behaviour loses stability to another. This paper is concerned with the analysis of the temporal behaviour of two-dimensional double convection: roll convection in the presence of a stabilizing solute

  4. HumanWildlife Interactions 6(2):327334, Fall 2012 Mixed-breed guarding dogs reduce con-

    E-print Network

    Human­Wildlife Interactions 6(2):327­334, Fall 2012 Mixed-breed guarding dogs reduce con- flict the use of local, medium- sized, mixed-breed guarding dogs to reduce predation and retaliatory killing was attributed to cougars (Puma concolor) and culpeos (Lycalopex culpaeus). All herders with dogs that reached

  5. Comparative immunoprophylactic efficacy of Haemonchus contortus recombinant enolase (rHcENO) and Con A purified native glycoproteins in sheep.

    PubMed

    Kalyanasundaram, Aravindan; Jawahar, Shabnam; Ilangopathy, Manikkavasagan; Palavesam, Azahahianambi; Raman, Muthusamy

    2015-07-01

    Haemonchus contortus is the most economically important blood feeding nematode parasite of sheep and goats all over the world. Enolase in helminth parasites is a multi-functional enzyme which involves in glycolysis and host tissue invasion. In this study, the recombinant H. contortus enolase (rHcENO) was evaluated for its immunoprophylactic efficacy in sheep along with Con A purified native glycoproteins in a vaccine challenge trial. Group I and Group II experimental sheep were immunized thrice with rHcENO and Con A purified native glycoproteins along with Montanide ISA 61 VG adjuvant. The animals were challenged with 5000?L3 stage active H. contortus larvae after 21 days of third immunization. A significant increase in the IgG titre was observed in rHcENO and Con A purified native glycoproteins immunized animals as compared to the control animals. Immunoprotective efficacy of Con A purified native glycoproteins was comparatively higher than rHcENO antigen. PMID:25913090

  6. Ask mostAmericans about their energy con-cerns, and you're likely to get an earful about

    E-print Network

    Latham, Peter

    Ask mostAmericans about their energy con- cerns, and you're likely to get an earful about gasoline initiative on solar energy. In April, Lewis and physicist George Crabtree of Argonne National Labo- ratory for basic research in solar energy, from novel photo- voltaics to systems for using sunlight to generate

  7. TECHNOLOGY EVALUATION REPORT: INTERNATIONAL WASTE TECHNOLOGIES/GEO-CON IN SITU STABILIZATION/SOLIDIFICATION - VOLUME III - UPDATE REPORT

    EPA Science Inventory

    The long-term performance tests provide information on the first follow-up sampling and analysis on the SITE program demonstration of the International Waste Technologies additive, and the Geo-Con deep soil mixing equipment. he samples containing PCBs, were collected one year aft...

  8. TECHNOLOGY EVALUATION REPORT: INTERNATIONAL WASTE TECHNOLOGIES/GEO-CON IN SITU STABILIZATION/SOLIDIFICATION - VOLUME IV - UPDATE REPORT

    EPA Science Inventory

    The long-term performance tests provide information on the first follow-up sampling and analysis on the SITE program demonstration of the International Waste Technologies additive, and the Geo-Con deep soil mixing equipment. he samples containing PCBs, were collected one year aft...

  9. Nuevos materiales basados en cationes alcalinotrreos, reutilizables y de muy bajo coste con un elevado poder cataltico y de sorcin

    E-print Network

    elevado poder catalítico y de sorción El Consejo Superior de Investigaciones Científicas (CSIC) y el IMDEA. Estos materiales, que respetan el medio ambiente, de bajo costo, fácil fabricación y estabilidad térmica a los catalizadores industriales, debido a su fácil preparación, bajo coste y respeto con el medio

  10. iPathCons and iPathDB: an improved insect pathway construction tool and the database

    PubMed Central

    Zhang, Zan; Yin, Chuanlin; Liu, Ying; Jie, Wencai; Lei, Wenjie; Li, Fei

    2014-01-01

    Insects are one of the most successful animal groups on earth. Some insects, such as the silkworm and honeybee, are beneficial to humans, whereas others are notorious pests of crops. At present, the genomes of 38 insects have been sequenced and made publically available. In addition, the transcriptomes of dozens of insects have been sequenced. As gene data rapidly accumulate, constructing the pathway of molecular interactions becomes increasingly important for entomological research. Here, we developed an improved tool, iPathCons, for knowledge-based construction of pathways from the transcriptomes or the official gene sets of genomes. Considering the high evolution diversity in insects, iPathCons uses a voting system for Kyoto Encyclopedia of Genes and Genomes Orthology assignment. Both stand-alone software and a web server of iPathCons are provided. Using iPathCons, we constructed the pathways of molecular interactions of 52 insects, including 37 genome-sequenced and 15 transcriptome-sequenced ones. These pathways are available in the iPathDB, which provides searches, web server, data downloads, etc. This database will be highly useful for the insect research community. Database URL: http://ento.njau.edu.cn/ipath/ PMID:25388589

  11. 7 settembre 2006 00101 Marcare con una crocetta le risposte ritenute corrette e consegnare la scheda al termine della prima

    E-print Network

    Frosini, Patrizio

    matrici reali 5×5 con traccia nulla `e un gruppo rispetto alla usuale operazione di prodotto righe per colonne. B) l'insieme IR dei numeri reali `e un gruppo commutativo rispetto alla usuale operazione di somma. C) l'insieme dei polinomi reali `e un campo rispetto alle usuali operazioni di somma e prodotto

  12. 19 settembre 2005 00101 Marcare con una crocetta le risposte ritenute corrette e consegnare la scheda al termine della prima

    E-print Network

    Frosini, Patrizio

    gruppo rispetto alla usuale operazione di somma. B) l'insieme dei numeri reali `e un gruppo rispetto alla usuale operazione di somma. C) l'insieme delle matrici reali 4 × 4 `e un campo rispetto alle usuali alle usuali operazioni di somma e di prodotto. 2) Siano A e B due matrici reali n × n, con

  13. 12 dicembre 2005 00101 Marcare con una crocetta le risposte ritenute corrette e consegnare la scheda al termine della prima

    E-print Network

    Frosini, Patrizio

    matrici reali 2×2 a traccia nulla `e un gruppo commutativo rispetto alla usuale operazione di somma. B) l'anello delle matrici reali 2 × 2 (con le usuali operazioni di somma e prodotto) non contiene divisori dello- sizione di funzioni. 2) Siano A, B e C tre matrici reali n × n ortogonali. Allora A) (2A + B) · (2A - B

  14. 20 marzo 2007 00101 Marcare con una crocetta le risposte ritenute corrette e consegnare la scheda al termine della prima

    E-print Network

    Frosini, Patrizio

    reali 3 × 3 simmetriche `e un gruppo commutativo rispetto alla usuale operazione di somma. B) l. D) l'insieme dei numeri reali diversi da 0 `e un campo rispetto alle usuali operazioni di somma e prodotto. 2) Siano A, B e C tre matrici reali n × n con determinante non nullo. Allora A) t (A · B · C) `e

  15. 13 dicembre 2006 00101 Marcare con una crocetta le risposte ritenute corrette e consegnare la scheda al termine della prima

    E-print Network

    Frosini, Patrizio

    matrici reali 4×4 con determinante strettamente positivo `e un gruppo rispetto alla usuale operazione di e prodotto per uno scalare. B) l'insieme delle matrici reali 5×5 a traccia nulla `e un sottospazio. D) l'insieme delle successioni reali non convergenti, dotato delle usuali operazioni di somma e

  16. La Lista (v1.0) Questa lista verr`a aggiornata continuamente con l'inserimento di

    E-print Network

    Presilla, Carlo

    ). Sia A un insieme di numeri reali. Il numero reale s `e detto estremo superiore di A (e si scrive reali (o complessi) k=1 ak `e convergente, allora si ha limk ak = 0. (AR5) (Controesempio: La = x + iy con x, y reali, |z| := x2 + y2. 2 #12;(NC4) (Propriet`a del modulo e della coniugazione). (a

  17. 21 luglio 2006 00101 Marcare con una crocetta le risposte ritenute corrette e consegnare la scheda al termine della prima

    E-print Network

    Frosini, Patrizio

    reali 7×7 invertibili `e un gruppo non commutativo rispetto alla usuale operazione di prodotto righe per colonne. B) l'insieme IR dei numeri reali `e un gruppo rispetto alla usuale operazione di divisione. C) l prodotto. 2) Siano A, B e C tre matrici reali n × n con determinante strettamente positivo. Allora A) t (A

  18. Spectral analysis software improves con dence in plant and soil water stable isotope analyses performed by isotope ratio infrared

    E-print Network

    Goldsmith, Greg

    Spectral analysis software improves con dence in plant and soil water stable isotope analyses performed by isotope ratio infrared spectroscopy (IRIS) A. G. West1 *, G. R. Goldsmith2 , I. Matimati1 and T for Stable Isotope Biogeochemistry, University of California Berkeley, Berkeley, CA 94720, USA Previous

  19. Assessing ComSciCon 2013: A science communication workshop for STEM graduate students (Invited)

    NASA Astrophysics Data System (ADS)

    Kohler, S.; Ranjan, S.; Sanders, N.; Morey, S.

    2013-12-01

    We report on the efficacy of Communicating Science 2013, a science communication workshop for graduate students. Effective science communication is imperative for the sharing of scientific ideas, continued funding and support from policy makers, and education of the public. Science graduate students are a prime group to target for communication training, as they will be our future scientists, educators, and EPO professionals. To this end, Communicating Science 2013 (ComSciCon), a workshop organized by and for STEM graduate students, was held in June of this year. This workshop taught graduate students from around the nation to effectively communicate science to both their peers and the public. To learn about grad students' attitudes toward science communication and establish the workshop's efficacy, we surveyed the participants both before and after the workshop. This assessment probed topics such as communication preparation the participants have already received, how science communication is perceived in their home department, and what participants gained from the workshop. We report the results here.

  20. Pros and cons of the liposome platform in cancer drug targeting.

    PubMed

    Gabizon, Alberto A; Shmeeda, Hilary; Zalipsky, Samuel

    2006-01-01

    Coating of liposomes with polyethylene-glycol (PEG) by incorporation in the liposome bilayer of PEG-derivatized lipids results in inhibition of liposome uptake by the reticulo-endothelial system and significant prolongation of liposome residence time in the blood stream. Parallel developments in drug loading technology have improved the efficiency and stability of drug entrapment in liposomes, particularly with regard to cationic amphiphiles such as anthracyclines. An example of this new generation of liposomes is a formulation of pegylated liposomal doxorubicin known as Doxil or Caelyx, whose clinical pharmacokinetic profile is characterized by slow plasma clearance and small volume of distribution. A hallmark of these long-circulating liposomal drug carriers is their enhanced accumulation in tumors. The mechanism underlying this passive targeting effect is the phenomenon known as enhanced permeability and retention (EPR) which has been described in a broad variety of experimental tumor types. Further to the passive targeting effect, the liposome drug delivery platform offers the possibility of grafting tumor-specific ligands on the liposome membrane for active targeting to tumor cells, and potentially intracellular drug delivery. The pros and cons of the liposome platform in cancer targeting are discussed vis-à-vis nontargeted drugs, using as an example a liposome drug delivery system targeted to the folate receptor. PMID:16952872

  1. Estereotipos Sexuales y su Relación con Conductas Sexuales Riesgosas1,2,3

    PubMed Central

    Pérez-Jiménez, David; Orengo-Aguayo, Rosaura E.

    2012-01-01

    Resumen Los estereotipos sexuales son creencias generalmente aceptadas y poco cuestionadas que podrían contribuir a cómo los hombres y las mujeres debemos expresar nuestra sexualidad. Los objetivos de este estudio eran identificar cuántos hombres y mujeres heterosexuales en Puerto Rico endosaban ciertos estereotipos acerca de la sexualidad masculina y femenina y explorar la relación entre el endoso de estos estereotipos sexuales y las actitudes hacia el condón masculino y su uso en relaciones sexuales vaginales Llevamos a cabo un estudio descriptivo-correlacional mediante el cual le administramos dos escalas, una sobre sexualidad masculina y otra sobre sexualidad femenina a un grupo de 429 personas heterosexuales. Encontramos que los hombres endosaron estereotipos sexuales masculinos y femeninos más que las mujeres y que estos tienden a tener una visión más conservadora respecto a la sexualidad femenina que la que tienen sobre su propia sexualidad. Las mujeres, por otra parte, tienden a ver su propia sexualidad y la sexualidad masculina en términos menos estereotipados y más equitativos. También encontramos que a mayor endoso de creencias tradicionales sobre la sexualidad masculina y femenina, peor la actitud hacia el uso del condón masculino. Sin embargo, el endosar estereotipos sexuales masculinos y/o femeninos no se relacionó con el uso del condón. Estos hallazgos contradicen la literatura que sugiere que estos estereotipos sexuales y de género resultan en conductas sexuales de alto riesgo, lo cual tiene implicaciones importantes para el desarrollo e implementación de programas de prevención. PMID:24575164

  2. REGLAMENTO DE LA LEY DE BIOSEGURIDAD DE ORGANISMOS GENTICAMENTE MODIFICADOS CMARA DE DIPUTADOS DEL H. CONGRESO DE LA UNIN

    E-print Network

    salud pública: Aquellos organismos cuya modificación genética tenga como objetivo generar mecanismos de Biotecnología del Convenio sobre la Diversidad Biológica; VI. SALUD: La Secretaría de Salud; VII. Secretaría la Secretaría competente o SALUD, en su caso, se deberá adjuntar copia del pago de derechos, al

  3. Corso di Teoria dei Gruppi -a.a. 2009-2010 Sia G un gruppo abeliano. Indichiamo con G l'insieme degli omomorfismi G C, dove C

    E-print Network

    Cornalba, Maurizio

    Corso di Teoria dei Gruppi - a.a. 2009-2010 Esercizi 3 Sia G un gruppo abeliano. Indichiamo con G l'insieme degli omomorfismi G CÃ?, dove CÃ? `e il gruppo moltiplicativo dei numeri complessi non nulli. Se , sono elementi di G, poniamo (g) = (g)(g) per ogni g G. 1. Mostrare che G. 2. Mostrare che con il prodotto

  4. resulting system (RPLAN) is tested in a natural, indoor environment. RPLAN con sists of three components. The first systematically integrates sonar and vision sensing

    E-print Network

    Kortenkamp, David

    1 resulting system (RPLAN) is tested in a natural, indoor environment. RPLAN con­ sists of three image­like spatial representations, biased route networks and the integration of sonar and vision, editors, From Animals to Animats 2: Proceedings of the Second International Con­ ference on Simulation

  5. Resultados de la primera etapa del Concurso IDi4Biz emprendedores Cinvestav Con fundamento en lo dispuesto en las bases de la convocatoria del Concurso IDi4Biz

    E-print Network

    Resultados de la primera etapa del Concurso IDi4Biz® emprendedores Cinvestav Con fundamento en lo dispuesto en las bases de la convocatoria del Concurso IDi4Biz® emprendedores Cinvestav, publicadas en el administrativamente con todos los requisitos estipulados para la primera etapa del Concurso IDi4Biz® emprendedores

  6. La Escuela Politcnica Superior de la Universidad de Alicante, en colaboracin con la Unidad de Igualdad, invita a alumnas de 3 y 4 de secundaria al .

    E-print Network

    Escolano, Francisco

    Artificial) · CHARLA: "Introducción a la microrobótica" · "Aprendo robótica con Lego Mindstorm". Aprendizaje práctico de robótica jugando con Lego Mindstorm. El taller se centrará en el uso del kit Lego Mindstorm definir el comportamiento de los robots que construyamos a partir de las piezas disponibles. #12;TALLER DE

  7. Diabetes mellitus. Una enfermedad crnica asociada con niveles anormalmente altos del azcar de la glucosa en sangre. La causa de esta anormalidad es el hecho de

    E-print Network

    Fitze, Patrick

    Diabetes mellitus. Una enfermedad crónica asociada con niveles anormalmente altos del azúcar de la glucosa que se necesita absorber con la ayuda de la hormona insulina. La diabetes se debe a uno de estos acción de la insulina. Diabetes no insulinodependiente. Véase la entrada «Diabetes tipo 2». Diabetes tipo

  8. Bando n. 01/2012 del 24 luglio 2012 per il conferimento di incarico di professore straordinario con rapporto di lavoro a tempo determinato

    E-print Network

    Di Pillo, Gianni

    rapporto di lavoro a tempo determinato APPROVAZIONE ATTI Il Direttore del Dipartimento di Fisiologia e straordinario a tempo determinato emanato con Decreto Rettorale n. 220 del 4.2.2011; Viste la delibera del a tempo determinato, con regime di impegno a tempo pieno, per il progetto di ricerca dal titolo

  9. (Con)text-specific effects of visual dysfunction on reading in posterior cortical atrophy.

    PubMed

    Yong, Keir X X; Shakespeare, Timothy J; Cash, Dave; Henley, Susie M D; Warren, Jason D; Crutch, Sebastian J

    2014-08-01

    Reading deficits are a common early feature of the degenerative syndrome posterior cortical atrophy (PCA) but are poorly understood even at the single word level. The current study evaluated the reading accuracy and speed of 26 PCA patients, 17 typical Alzheimer's disease (tAD) patients and 14 healthy controls on a corpus of 192 single words in which the following perceptual properties were manipulated systematically: inter-letter spacing, font size, length, font type, case and confusability. PCA reading was significantly less accurate and slower than tAD patients and controls, with performance significantly adversely affected by increased letter spacing, size, length and font (cursive < non-cursive), and characterised by visual errors (69% of all error responses). By contrast, tAD and control accuracy rates were at or near ceiling, letter spacing was the only perceptual factor to influence reading speed in the same direction as controls, and, in contrast to PCA patients, control reading was faster for larger font sizes. The inverse size effect in PCA (less accurate reading of large than small font size print) was associated with lower grey matter volume in the right superior parietal lobule. Reading accuracy was associated with impairments of early visual (especially crowding), visuoperceptual and visuospatial processes. However, these deficits were not causally related to a universal impairment of reading as some patients showed preserved reading for small, unspaced words despite grave visual deficits. Rather, the impact of specific types of visual dysfunction on reading was found to be (con)text specific, being particularly evident for large, spaced, lengthy words. These findings improve the characterisation of dyslexia in PCA, shed light on the causative and associative factors, and provide clear direction for the development of reading aids and strategies to maximise and sustain reading ability in the early stages of disease. PMID:24841985

  10. Outreach Opportunities for Early Career Scientists at the Phoenix ComiCon

    NASA Astrophysics Data System (ADS)

    Horodyskyj, L.; Walker, S. I.; Forrester, J. H.

    2014-12-01

    The Phoenix ComiCon (PCC) is a rapidly growing annual four-day pop culture event, featuring guests, costuming, exhibits, and discussion panels for popular sci-fi, fantasy, horror, and anime franchises. In 2013, PCC began experimenting with science discussion panels. The popularity of the science programming resulted in an expansion of the track for 2014, which Horodyskyj was responsible for coordinating. Thirty hours of programming were scheduled, including 25 discussion panels, NASA's FameLab, and a Mars room. Panelists included industry specialists, established scientists, STEM outreach enthusiasts, and early career scientists. The majority of the panelists were early career scientists recruited from planetary sciences and biology departments at ASU and UA. Panel topics included cosmology, biotechnology, artificial intelligence, space exploration, astrobiology, and the cross-linkages of each with pop culture. Formats consisted of Q&A, presentations, and interactive game shows. Although most panels were aimed at the general audience, some panels were more specialized. PCC 2014 attracted 77,818 attendees. The science programming received rave reviews from the audience, the PCC management, and the panelists themselves. Many panel rooms were filled to capacity and required crowd control to limit attendance. We observed the formation of science "groupies" who sought out the science panels exclusively and requested more information on other science public events in the Phoenix area. We distributed surveys to several select sessions to evaluate audience reasons for attending the science panels and their opinion of the scientists they observed. We will present the results of these surveys. As the PCC continues to grow at an exponential rate, the science programming will continue to expand. We will discuss ideas for continued expansion of the PCC science programming both to serve the public and as a unique public outreach opportunity for early career scientists.

  11. Strain Rate into South American Plate by SIRGAS-CON Geodetic Observations

    NASA Astrophysics Data System (ADS)

    Marotta, G. S.; Franca, G. S.; Monico, J. G.; Fuck, R. A.

    2013-05-01

    In this study were investigated the surface strain rates computed from the direction variations and velocity values estimated from the coordinates of the continuous monitoring geodetic network called SIRGAS-CON. That investigation was done using points located in the South American plate. The determination of the strain rate was based on the Finite Element method using points defined by Delaunay triangulation (sub-networks). Each one of sub-networks was considered as an homogeneous solid body. Using these methods was possible to separate the strain from the plate movement. The results showed that there are differences of strain rate along the South American plate. From the results were suggest that near to the west board of the plate, the strain is more significant, as expected, because this region is near to one area where Nazca Plate subduct South American Plate. It was detected that the contraction region founded in this area coincides whit the region where occurs most of earthquakes of greater magnitude. Far from the board, there are some areas with anomalies of significant strain of extension and contraction that can be originated by differences of stress aligned with different geological composites. By the results, It may be concluded that large surface movements occur in regions with more heterogeneous geological structures and multiple event of rupture, that large earthquakes arising from large tectonic activity into South American Plate are concentrated in areas with contraction strain rates predominantly oriented towards northeast-southwest, that significant amounts of elastic strain can be accumulated over geological structures away from fault plate boundary and that the behavior of contractions and extensions are similar to that found by different researches involving geophysical studies. Dilation and principal components of strain rate

  12. Characterization Data Package for Containerized Sludge Samples Collected from Engineered Container SCS-CON-210

    SciTech Connect

    Fountain, Matthew S.; Fiskum, Sandra K.; Baldwin, David L.; Daniel, Richard C.; Bos, Stanley J.; Burns, Carolyn A.; Carlson, Clark D.; Coffey, Deborah S.; Delegard, Calvin H.; Edwards, Matthew K.; Greenwood, Lawrence R.; Neiner, Doinita; Oliver, Brian M.; Pool, Karl N.; Schmidt, Andrew J.; Shimskey, Rick W.; Sinkov, Sergey I.; Snow, Lanee A.; Soderquist, Chuck Z.; Thompson, Christopher J.; Trang-Le, Truc LT; Urie, Michael W.

    2013-09-10

    This data package contains the K Basin sludge characterization results obtained by Pacific Northwest National Laboratory during processing and analysis of four sludge core samples collected from Engineered Container SCS-CON-210 in 2010 as requested by CH2M Hill Plateau Remediation Company. Sample processing requirements, analytes of interest, detection limits, and quality control sample requirements are defined in the KBC-33786, Rev. 2. The core processing scope included reconstitution of a sludge core sample distributed among four to six 4-L polypropylene bottles into a single container. The reconstituted core sample was then mixed and subsampled to support a variety of characterization activities. Additional core sludge subsamples were combined to prepare a container composite. The container composite was fractionated by wet sieving through a 2,000 micron mesh and a 500-micron mesh sieve. Each sieve fraction was sampled to support a suite of analyses. The core composite analysis scope included density determination, radioisotope analysis, and metals analysis, including the Waste Isolation Pilot Plant Hazardous Waste Facility Permit metals (with the exception of mercury). The container composite analysis included most of the core composite analysis scope plus particle size distribution, particle density, rheology, and crystalline phase identification. A summary of the received samples, core sample reconstitution and subsampling activities, container composite preparation and subsampling activities, physical properties, and analytical results are presented. Supporting data and documentation are provided in the appendices. There were no cases of sample or data loss and all of the available samples and data are reported as required by the Quality Assurance Project Plan/Sampling and Analysis Plan.

  13. Iliac crest autograft versus alternative constructs for anterior cervical spine surgery: Pros, cons, and costs

    PubMed Central

    Epstein, Nancy E.

    2012-01-01

    Background: Grafting choices available for performing anterior cervical diskectomy/fusion (ACDF) procedures have become a major concern for spinal surgeons, and their institutions. The “gold standard”, iliac crest autograft, may still be the best and least expensive grafting option; it deserves to be reassessed along with the pros, cons, and costs for alternative grafts/spacers. Methods: Although single or multilevel ACDF have utilized iliac crest autograft for decades, the implant industry now offers multiple alternative grafting and spacer devices; (allografts, cages, polyether-etherketone (PEEK) amongst others). While most studies have focused on fusion rates and clinical outcomes following ACDF, few have analyzed the “value-added” of these various constructs (e.g. safety/efficacy, risks/complications, costs). Results: The majority of studies document 95%-100% fusion rates when iliac crest autograft is utilized to perform single level ACDF (X-ray or CT confirmed at 6-12 postoperative months). Although many allograft studies similarly quote 90%-100% fusion rates (X-ray alone confirmed at 6-12 postoperative months), a recent “post hoc analysis of data from a prospective multicenter trial” (Riew KD et. al., CSRS Abstract Dec. 2011; unpublished) revealed a much higher delayed fusion rate using allografts at one year 55.7%, 2 years 87%, and four years 92%. Conclusion: Iliac crest autograft utilized for single or multilevel ACDF is associated with the highest fusion, lowest complication rates, and significantly lower costs compared with allograft, cages, PEEK, or other grafts. As spinal surgeons and institutions become more cost conscious, we will have to account for the “value added” of these increasingly expensive graft constructs. PMID:22905321

  14. Informatica 2 Esame di marted 16 settembre 2008 -CON SOLUZIONI pagina 4 di 22 esercizio n. 2 memoria virtuale

    E-print Network

    Silvano, Cristina

    MMU agli istanti t0 e t1, utilizzando la notazione CP0 CP1 DP0 PP0 ... CQ0 ... per indicare le pagine virtuali dei processi; nelle ta- belle della MMU si aggiunga anche il NPV effettivo con la notazione CP0/0 ecc ...; in tutte le tabelle si usi la notazione (CP0) ecc ... per indicare un dato non più valido e

  15. Atomic Mechanism of Electrocatalytically Active Co-N Complexes in Graphene Basal Plane for Oxygen Reduction Reaction.

    PubMed

    Li, Feng; Shu, Haibo; Hu, Chenli; Shi, Zhaoyi; Liu, Xintong; Liang, Pei; Chen, Xiaoshuang

    2015-12-16

    Superior catalytic activity and high chemical stability of inexpensive electrocatalysts for the oxygen reduction reaction (ORR) are crucial to the large-scale practical application of fuel cells. The nonprecious metal/N modified graphene electrocatalysts are regarded as one of potential candidates, and the further enhancement of their catalytic activity depends on improving active reaction sites at not only graphene edges but also its basal plane. Herein, the ORR mechanism and reaction pathways of Co-N co-doping onto the graphene basal plane have been studied by using first-principles calculations and ab initio molecular dynamics simulations. Compared to singly N-doped and Co-doped graphenes, the Co-N co-doped graphene surface exhibits superior ORR activity and the selectivity toward a four-electron reduction pathway. The result originates from catalytic sites of the graphene surface being modified by the hybridization between Co 3d states and N 2p states, resulting in the catalyst with a moderate binding ability to oxygenated intermediates. Hence, introducing the Co-N4 complex onto the graphene basal plane facilitates the activation of O2 dissociation and the desorption of H2O during the ORR, which is responsible for the electrocatalyst with a smaller ORR overpotential (?1.0 eV) that is lower than that of Co-doped graphene by 0.93 eV. Our results suggest that the Co-N co-doped graphene is able to compete against platinum-based electrocatalysts, and the greater efficient electrocatalysts can be realized by carefully optimizing the coupling between transition metal and nonmetallic dopants in the graphene basal plane. PMID:26566009

  16. Integrated Concentration in Science (iCons): Undergraduate Education Through Interdisciplinary, Team-Based, Real-World Problem Solving

    NASA Astrophysics Data System (ADS)

    Tuominen, Mark

    2013-03-01

    Attitude, Skills, Knowledge (ASK) - In this order, these are fundamental characteristics of scientific innovators. Through first-hand practice in using science to unpack and solve complex real-world problems, students can become self-motivated scientific leaders. This presentation describes the pedagogy of a recently developed interdisciplinary undergraduate science education program at the University of Massachusetts Amherst focused on addressing global challenges with scientific solutions. Integrated Concentration in Science (iCons) is an overarching concentration program that supplements the curricula provided within each student's chosen major. iCons is a platform for students to perform student-led research in interdisciplinary collaborative teams. With a schedule of one course per year over four years, the cohort of students move through case studies, analysis of real-world problems, development of potential solutions, integrative communication, laboratory practice, and capstone research projects. In this presentation, a track emphasizing renewable energy science is used to illustrate the iCons pedagogical methods. This includes discussion of a third-year laboratory course in renewable energy that is educationally scaffolded: beginning with a boot camp in laboratory techniques and culminating with student-designed research projects. Among other objectives, this course emphasizes the practice of using reflection and redesign, as a means of generating better solutions and embedding learning for the long term. This work is supported in part by NSF grant DUE-1140805.

  17. Deformation sequences of the Day Nui Con Voi metamorphic belt, northern Vietnam

    NASA Astrophysics Data System (ADS)

    Yeh, M. W.; Lee, T. Y.; Lo, C. H.; Chung, S. L.; Lan, C. Y.; Lee, J. C.; Lin, T. S.; Lin, Y. J.

    2003-04-01

    The correlation of structure, microstructure and metamorphic assemblages is of fundamental importance to the understanding of the complex tectonic history and kinematics of the Day Nui Con Voi (DNCV) metamorphic belt in Vietnam along the Ailao Shan-Red River (ASRR) shear zone as it provides constraints on the relative timing of the deformation, kinematics and metamorphism. High-grade metamorphic rocks of amphibolite faces showed consistent deformation sequences of three folding events followed by one brittle deformation through all four cross sections from Lao Cai to Viet Tri indicated the DNCV belt experienced similar deformation condition throughout its length. The first deformation event, D1, produced up-right folds (locally preserved) with sub-vertical, NE-SW striking axial planes with dextral sense of shear probably formed during the early phase of the lowermost Triassic Indosinian orogeny. Followed by this compressional event is a gravitational collapsing event, D2, which is the major deformation and metamorphic event characterized by kyanite grade metamorphism and large scale horizontal folds with NW-SE (320) striking sub-horizontal axial pane showing sinsistral sense of shear most likely formed during the Oligocene-Miocene SE extrusion of Indochina peninsula. The 3rd folding event, D3, is a post-metamorphism doming event with NW-SE (310) striking sub-vertical axial plane that folded/tilted the once sub-horizontal D2 axial planes into shallowly (<30 degrees) NE dipping on the NE limb, and SW dipping on the SW limb possibly due to left-lateral movement of the N-S trending Xian Shui He fault system in Mid-Miocene. The outward decreasing of the metamorphic grade from kyanite to garnet then biotite indicated the D3 occurred post metamorphism. Reactivation of the sub-horizontal D2 fold axial planes showed dextral sense of shear possibly due to Late Miocene-Pliocene right-lateral movement of the ASRR shear zone. This right lateral movement continuously deformed the DNCV with brittle fractures such as joints and normal faults (D4) striking NE-SW to E-W and NW-SE.

  18. Desarrollo de la Escala sobre el Estigma Relacionado con el VIH/SIDA para Profesionales de la Salud mediante el uso de métodos mixtos123

    PubMed Central

    Varas-Díaz, Nelson; Neilands, Torsten B.; Guilamo-Ramos, Vincent; Cintrón Bou, Francheska N.

    2009-01-01

    El estigma relacionado con el VIH/SIDA continúa siendo un obstáculo para la prevención primaria y secundaria del VIH. Las consecuencias para las personas que viven con la enfermedad han sido muy documentadas y continúan siendo una gran preocupación para las personas que proveen servicios de salud y para aquellas que investigan el tema. Estas consecuencias son preocupantes cuando el estigma emana de profesionales de la salud porque se puede limitar el acceso a los servicios. Uno de los principales obstáculos para la investigación del estigma relacionado con el VIH en Puerto Rico es la falta de instrumentos cuantitativos para evaluar las manifestaciones del estigma entre profesionales de la salud. El objetivo principal de este estudio fue desarrollar y probar las propiedades psicométricas de una escala sobre el estigma relacionado con el VIH/SIDA culturalmente apropiada para personas que proveen servicios de salud puertorriqueñas y desarrollar una versión corta de la escala que pudiera usarse en escenarios clínicos con tiempo limitado. El instrumento desarrollado estuvo basado en evidencia cualitativa recopilada entre profesionales y estudiantes de profesiones de la salud puertorriqueños/as (n=80) y administrado a una muestra de 421 profesionales de la salud en adiestramiento. La escala contenía 12 dimensiones del estigma relacionado con el VIH/SIDA. El análisis cuantitativo corroboró 11 de ellas, teniendo como resultado un instrumento con validez y confiabilidad satisfactoria. Estas dimensiones, a su vez, fueron subcomponentes de un factor de estigma general superior. PMID:20333258

  19. Fuentes de variabilidad en el diagnóstico de gastritis atrófica multifocal asociada con la infección por Helicobacter pylori1

    PubMed Central

    Bravo, Luis Eduardo; Bravo, Juan Carlos; Realpe, José Luis; Zarama, Guillermo; Piazuelo, MarÍa Blanca; Correa, Pelayo

    2014-01-01

    RESUMEN Introducción El mapeo de las diferentes regiones del estómago y el número de fragmentos de mucosa gástrica disponibles para evaluación histopatológica son fuentes importantes de variación en el momento de clasificar y hacer la gradación de la gastritis crónica. Objetivos Estimar la sensibilidad del número de fragmentos de mucosa gástrica necesarios para establecer los diagnósticos de gastritis atrófica con metaplasia intestinal (MI), displasia y estado de infección por Helicobacter pylori. Además evaluar la variabilidad intra-observador en la clasificación de estas lesiones precursoras del cáncer gástrico. Materiales y métodos En una cohorte de 6 años de seguimiento se evaluaron 1,958 procedimientos de endoscopia realizados por dos gastroenterólogos. En cada procedimiento y de cada participante se obtuvieron 5 biopsias de mucosa gástrica que representaban antro, incisura angularis y cuerpo. Un único patólogo hizo la interpretación histológica de las 5 biopsias y proporcionó un diagnóstico definitivo global que se utilizó como patrón de referencia. Cada fragmento de mucosa gástrica examinado condujo a un diagnóstico individual para cada biopsia que se comparó con el patrón de referencia. La variabilidad intra-observador se evaluó en 127 personas que corresponden a una muestra aleatoria de 20% del total de endoscopias hechas a los 72 meses de seguimiento. Resultados La sensibilidad del diagnóstico de MI y displasia gástrica aumentó de manera significativa con el número de fragmentos de mucosa gástrica evaluados El sitio anatómico de mayor sensibilidad para el diagnóstico de MI y displasia fue la incisura angularis. Para descubrir H. pylori se logró alta sensibilidad con el estudio de un solo fragmento de mucosa gástrica (95.9%) y fue independiente del sitio de obtención de la biopsia. El acuerdo intra-observador para el diagnóstico de gastritis crónica fue 86.1% con valor kappa de 0.79 IC 95% (0.76-0.85). Las biopsias fijadas en alcohol fueron inadecuadas para demostrar H. pylori e interpretar los cambios de displasia. Conclusión El número de fragmentos de mucosa gástrica evaluados, el método de fijación y la región del estómago donde se obtienen las biopsias son factores muy importantes para lograr una correcta clasificación de la gastritis crónica atrófica multifocal. PMID:25267864

  20. 40 CFR 60.211 - Definitions.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...STATIONARY SOURCES Standards of Performance for the Phosphate Fertilizer Industry: Superphosphoric Acid Plants § 60.211 Definitions...P2 O5 content by weight for eventual consumption as a fertilizer. (b) Total fluorides means elemental fluorine...

  1. 40 CFR 60.211 - Definitions.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...STATIONARY SOURCES Standards of Performance for the Phosphate Fertilizer Industry: Superphosphoric Acid Plants § 60.211 Definitions...P2 O5 content by weight for eventual consumption as a fertilizer. (b) Total fluorides means elemental fluorine...

  2. 40 CFR 60.211 - Definitions.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...STATIONARY SOURCES Standards of Performance for the Phosphate Fertilizer Industry: Superphosphoric Acid Plants § 60.211 Definitions...P2 O5 content by weight for eventual consumption as a fertilizer. (b) Total fluorides means elemental fluorine...

  3. 40 CFR 60.211 - Definitions.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...STATIONARY SOURCES Standards of Performance for the Phosphate Fertilizer Industry: Superphosphoric Acid Plants § 60.211 Definitions...P2 O5 content by weight for eventual consumption as a fertilizer. (b) Total fluorides means elemental fluorine...

  4. 40 CFR 60.211 - Definitions.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...STATIONARY SOURCES Standards of Performance for the Phosphate Fertilizer Industry: Superphosphoric Acid Plants § 60.211 Definitions...P2 O5 content by weight for eventual consumption as a fertilizer. (b) Total fluorides means elemental fluorine...

  5. CONVENZIONE DI TIROCINIO L'Universit degli Studi di Salerno con sede in Fisciano (SA) alla via Giovanni Paolo II, n. 132 CAP 84084 Cod.

    E-print Network

    Costagliola, Gennaro

    Giovanni Paolo II, n. 132 ­ CAP 84084 Cod. Fisc.80018670655, nel seguito più semplicemente denominata'Istituto Scolastico ______________________________, Cod. Mecc. ______________________ con sede in _____________________ alla via ___________________________________, Cod. Fisc. ____________________ nel seguito più

  6. AC 2011-376: WIRELESS-INTEGRATED EMBEDDED REAL-TIME CON-TROL: A CASE STUDY IN ADOPTING RESOURCES FOR DEVELOP-

    E-print Network

    AC 2011-376: WIRELESS-INTEGRATED EMBEDDED REAL-TIME CON- TROL: A CASE STUDY IN ADOPTING RESOURCES, and 1995, respectively, from the University of Michigan, Ann Arbor. From 1988-1990 he worked at Hughes

  7. IL DIRETTORE DEL DIPARTIMENTO DI NEUROLOGIA E OTORINOLARINGOIATRIA Visto il Regolamento relativo al reclutamento di Ricercatori con contratto di lavoro a tempo

    E-print Network

    Di Pillo, Gianni

    reclutamento di Ricercatori con contratto di lavoro a tempo determinato, ai sensi dell'art. 1, comma 14 della reclutamento di n. 1 Ricercatore a tempo determinato per la durata di 1 anno presso il Dipartimento di

  8. ONA REPORTS published in

    E-print Network

    Ma, Lena

    to 20 feet in 30 days, with no vegetative competition. Stargrass planted in clean, moist, well prepared. For rapid development, newly planted stargrass should be fertilized with 30-40-40 lb/A N-P2O5-K2O plus) stargrass include annual fertilization of 180-40-80 lb N-P2O5-K2O. For best results this fertilizer rate

  9. Nanoparticulas basadas en complejos de Fe(II) con transicion de espin: sintesis, caracterizacion y aplicaciones en electronica molecular

    NASA Astrophysics Data System (ADS)

    Monrabal Capilla, Maria

    Esta tesis doctoral esta organizada en 5 capitulos y esta destinada al estudio de sistemas de Fe (II) que presentan el fenomeno de la transicion de espin a escala nanometrica. El capitulo 1 contiene una introduccion general sobre materiales moleculares multifuncionales, destacando aquellos ejemplos mas importantes. Por otro lado, se explicara el fenomeno de la transicion de espin, tratando aspectos conceptuales, los antecedentes mas importantes y la situacion actual. En el capitulo 2 se describen los diferentes procesos existentes para la obtencion de diferentes tipos de nanoparticulas. Ademas, se presenta la sintesis y caracterizacion de nanoparticulas del polimero de coordinacion unidimensional [Fe(Htrz)2(trz)]BF4, obtenidas mediante el metodo de micelas inversas. Estas nanoparticulas, con una estrecha distribucion de tamanos centrada alrededor de los 11 nm, presentan una transicion de espin muy abrupta, con un ancho ciclo de histeresis termica de unos 40K. En el capitulo 3 se describe el proceso de modificacion del tamano de las nanoparticulas descritas en el capitulo anterior, llevado a cabo variando la proporcion de surfactante/H2O en el medio. Ademas, con el objetivo de modificar las propiedades magneticas de las nanoparticulas obtenidas en el capitulo 2, se lleva a cabo la sintesis de nanoparticulas de polimeros de la misma familia del [Fe(Htrz)2(trz)]BF4. En concreto se sintetizaron 3 nuevos tipos de nanoparticulas basadas en el polimero [Fe(Htrz)1-x(NH2trz)x](ClO4)2, siendo x = 0.05, 0.15 y 0.3, en cada caso. Estas nanoparticulas siguen presentando una estrecha distribucion de tamanos y una transicion de espin muy abrupta y con un ancho ciclo de histeresis. Ademas, se observa que este ciclo se desplaza a temperaturas mas proximas a la temperatura ambiente a medida que se aumenta el porcentaje de 4-amino-1, 2, 4- triazol en la muestra. Pero al mismo tiempo se produce una disminucion de la anchura de este ciclo. Por ultimo, en este capitulo se presenta la sintesis de otro nuevo tipo de nanoparticulas, obtenidas a partir de otro polimero de la misma familia, el [FeO8ZnO2(Htrz)3](BF4). Estas nanoparticulas se sintetizaron con el objetivo de estudiar el efecto de la dilucion del metal en la muestra. Como resultado se obtuvieron nanoparticulas que tambien presentan una estrecha distribucion de tamanos pero en este caso la transicion de espin no es tan abrupta como en los casos anteriores. Aunque sigue presentando un ciclo de histeresis termica bastante ancho y a temperaturas proximas a la temperatura ambiente. En el capitulo 4 se describiran las estrategias que se han seguido para mejorar la estabilidad y afinidad sobre diferentes sustratos de las nanoparticulas sintetizadas en el capitulo 2. Tambien se hablara de los intentos realizados parar depositarlas en superficies y embeberlas en diferentes matrices organicas e inorganicas. En el capitulo 5 presentaremos la obtencion de un interruptor molecular realizado poniendo en contacto nanoparticulas individuales sintetizadas en el capitulo 2, con unos electrodos separados varios nanometros. Este dispositivo exhibe "switching" y efecto memoria a temperaturas proximas a la temperatura ambiente como consecuencia de la biestabilidad intrinseca de las nanoparticulas. Ademas demostraremos que el estado magnetico de estas nanoparticulas puede ser controlado electricamente, ya que la transicion de espin en este nanodispositivo molecular puede ser inducida simplemente aplicando un voltaje, lo que puede ser de gran interes para la electronica molecular.

  10. "Estudio tribologico de aceros para moldes. Aplicacion al moldeo por inyeccion de polibutilentereftalato reforzado con fibra de vidrio"

    NASA Astrophysics Data System (ADS)

    Martinez Mateo, Isidoro Jose

    Mould materials for injection moulding of polymers and polymer-matrix composites represent a relevant industrial economic sector due to the large quantity of pieces and components processed. The material selection for mould manufacturing, its composition and heat treatment, the hardening procedures and machining and finishing processes determine the service performance and life of the mould. In the first part of the present study, the relationship between the hardness and microstructure and the wear resistance of mould steels from large blocks has been studied by pin-on-disc tests, studying the main wear mechanisms. In order to determine the surface damage on mould steels under real injection conditions, different commercial steels have been studied by measuring the variation of surface roughness with the number of injected pieces with different reinforcement percentages and different mould geometries, by using optical profilometry and scanning electron microscopy techniques. It was important to determine the variation of surface roughness of the moulded pieces with the number of injection operations. The materials used were polybutyleneterephthalate pure and reinforced with either 20% or 50% glass fibre. For the different mould designs, the evolution of the glass fibre orientation with injection flow has been determined by image analysis and related to roughness changes and surface damage, both of the composite parts and of the mould steel surface. Finally, the abrasion resistance of the composite parts has been studied by scratch tests as a function of the number of injected parts and of the scratch direction with respect to injection flow and glass fibre orientation. Los materiales para moldes de inyeccion de polimeros y materiales compuestos representan un sector economicamente muy relevante debido al gran aumento del numero de componentes fabricados a partir de materiales polimericos obtenidos mediante moldeo por inyeccion. La seleccion del material para la fabricacion del molde, tienen una gran influencia sobre su comportamiento en servicio a lo largo de la vida util del molde. En la primera parte del presente estudio, a partir de ensayos punzon sobre disco, se ha determinado la relacion entre la resistencia al desgaste y la dureza de aceros para moldes obtenidos a partir de bloques de gran espesor, estudiando los principales mecanismos de desgaste que tienen lugar. A continuacion, con el fin de determinar el dano superficial que sufren los aceros para moldes en condiciones reales de inyeccion, se han estudiado distintos tipos de aceros utilizados comercialmente en moldes de inyeccion de polimeros y materiales compuestos, seleccionando las condiciones de operacion para determinar la variacion de la rugosidad superficial del acero en funcion del material inyectado, del numero de operaciones sucesivas de inyeccion y de la orientacion del flujo de inyeccion, mediante tecnicas de perfilometria optica y microscopia electronica de barrido. Ademas del dano superficial sufrido por el acero con el numero de piezas inyectadas, tambien se ha determinado la evolucion de la rugosidad superficial de los materiales inyectados, polibutilentereftalato (PBT) puro y materiales compuestos derivados de PBT por adicion de un 20 o un 50% en peso de fibra de vidrio. En el caso de las piezas inyectadas, se ha caracterizado su microestructura en funcion del flujo de inyeccion y de la densidad de fibra, se han determinado sus propiedades termicas y dinamico-mecanicas, asi como la variacion de la rugosidad superficial de las piezas inyectadas con el numero de operaciones de inyeccion y con la geometria de las distintas secciones de las piezas. Finalmente, se ha evaluado la resistencia a la abrasion de PBT reforzado con un 50% de fibra, en funcion del numero de piezas inyectadas y de la direccion de rayado con respecto a la orientacion del flujo de inyeccion.

  11. Una cinta transportadora de longitud l se mueve con velocidad v respecto al suelo. Por su extremo derecho se introduce un bloque de masa m que se mover en contra de la cinta

    E-print Network

    Chang, Mark J. L.

    Problema 2 Una cinta transportadora de longitud l se mueve con velocidad v respecto al suelo. Por). Determine la velocidad vo (respecto al suelo) con la cual es necesario impulsar el bloque contra el, y que ahí se detenga respecto al suelo. En tal punto, con el bloque en reposo respecto al suelo

  12. Verde Sport S.p.A. con il sostegno di Telecom Italia, bandisce un concorso per il conferimento di 6 premi del valore di 1.000 euro ciascuno a favore di laureati in Universit italiane con tesi su temi riguardanti lo

    E-print Network

    Costagliola, Gennaro

    energetico nello sport e nel tempo libero; Turismo e sport; Impiantistica sportiva; Il doping sportivo siaBIBLIOTECA STEFANO BENETTON Verde Sport S.p.A. con il sostegno di Telecom Italia, bandisce un in Università italiane con tesi su temi riguardanti lo sport o la preparazione fisica, discusse nell

  13. The InterCon network: a program for education partnerships at the University of Texas-Houston Health Science Center.

    PubMed

    Castro, G A; Bouldin, P A; Farver, D W; Maugans, L A; Sanders, L C; Booker, J

    1999-04-01

    The University of Texas-Houston Health Science Center (UT-Houston) has created programs and activities to address the state's pressing needs in minority education. Through InterCon, a network of universities and K-12 schools, UT-Houston works with its partners to identify competitive candidates in the current pool of minority graduates with bachelor's degrees and to help them--along with their non-minority counterparts--progress in their education. Another objective is to expand the pool of minorities underrepresented in medicine who complete high school and go to college. In 1994 UT-Houston and Prairie View A&M University created a collaborative venture to provide new educational opportunities at UT-Houston for Prairie View's predominantly African American students. A three-track summer internship program--a result of that collaboration--has since been expanded to partnerships with other minority and majority universities throughout Texas. In 1998, for example, 108 undergraduate students from these universities (and 40 other universities nationwide) participated in research, professional, and administrative summer internships at UT-Houston. The InterCon network also has partnerships with K-12 schools. UT-Houston works with inner-city, suburban, and rural school districts to develop education models that can be transferred throughout the state. The partnerships deal with helping to teach basic academic skills and computer literacy, improve science-related instruction, meet demands for health promotion materials and information for school-initiated health and wellness programs, and develop distance-learning paradigms. UT-Houston views InterCon as a program helping Texas institutions to engage and adapt to the socioeconomic factors, demographic changes, and technology explosion that currently challenge public education. PMID:10219211

  14. Dietary n-3 PUFA Protects Mice from Con A Induced Liver Injury by Modulating Regulatory T Cells and PPAR-? Expression

    PubMed Central

    Sui, Yongheng; Li, Zhiping; Hua, Jing

    2015-01-01

    Background Dietary n-3 polyunsaturated fatty acids (PUFA) exert anti-inflammatory and immunoregulatory effects through down-regulating the innate and adoptive immune response. However, the effect of dietary n-3 PUFA on CD4+CD25+ regulatory T cells (Tregs) is unclear. Aims The current study was to examine the relationship between n-3 PUFA and Tregs as well as their immunoregulatory effect in immune-mediated liver injury. Methods The mice model feeding with n-3 PUFA-enriched diet was established and Tregs were analyzed. Effect of docosahexaenoic acid (DHA) on Tregs proliferation and induction was determined in vitro. The potential immunotherapeutic effect of dietary n-3 PUFA was investigated through Con A-induced hepatitis model. Results Long-term administration of dietary n-3 PUFA significantly increased hepatic Tregs and modulated their phenotype. n-3 PUFA or DHA directly increased natural Tregs (nTreg) proliferation but didn’t increase inducible Tregs (iTreg). In addition, the expression of peroxisome proliferator activated receptor gamma (PPAR-?), transforming growth factor ? (TGF-?) and interleukin (IL)-10 were significantly up-regulated in n-3 PUFA-enriched diet-fed mice. Finally, n-3 PUFA-enriched diet alleviated liver injury induced by Con A and down-regulated pro-inflammatory cytokines expression, accompanied by increased PPAR-? expression. Conclusion Dietary n-3 PUFA enhanced Tregs generation through up-regulating PPAR-? and TGF-? expression, and protected mice from Con A-induced liver injury. This finding provides a promising potential therapeutic method in treating inflammatory and autoimmune disease. PMID:26177196

  15. Influence of parameter values and variances and algorithm architecture in ConsExpo model on modeled exposures.

    PubMed

    Arnold, Susan F; Ramachandran, Gurumurthy

    2014-01-01

    This study evaluated the influence of parameter values and variances and model architecture on modeled exposures, and identified important data gaps that influence lack-of-knowledge-related uncertainty, using Consexpo 4.1 as an illustrative case study. Understanding the influential determinants in exposure estimates enables more informed and appropriate use of this model and the resulting exposure estimates. In exploring the influence of parameter placement in an algorithm and of the values and variances chosen to characterize the parameters within ConsExpo, "sensitive" and "important" parameters were identified: product amount, weight fraction, exposure duration, exposure time, and ventilation rate were deemed "important," or "always sensitive." With this awareness, exposure assessors can strategically focus on acquiring the most robust estimates for these parameters. ConsExpo relies predominantly on three algorithms to assess the default scenarios: inhalation vapors evaporation equation using the Langmuir mass transfer, the dermal instant application with diffusion through the skin, and the oral ingestion by direct uptake algorithm. These algorithms, which do not necessarily render health conservative estimates, account for 87, 89 and 59% of the inhalation, dermal and oral default scenario assessments,respectively, according them greater influence relative to the less frequently used algorithms. Default data provided in ConsExpo may be useful to initiate assessments, but are insufficient for determining exposure acceptability or setting policy, as parameters defined by highly uncertain values produce biased estimates that may not be health conservative. Furthermore, this lack-of-knowledge uncertainty makes the magnitude of this bias uncertain. Significant data gaps persist for product amount, exposure time, and exposure duration. These "important" parameters exert influence in requiring broad values and variances to account for their uncertainty. Prioritizing them for research will not only help fill a large and influential knowledge gap, but also lead to more accurate assessments and thus refine the studies informing policy decisions. PMID:24283337

  16. ConBr, a lectin from Canavalia brasiliensis seeds, modulates signaling pathways and increases BDNF expression probably via a glycosylated target.

    PubMed

    Rieger, Débora K; Cunha, Rodrigo M S; Lopes, Mark William; Costa, Ana Paula; Budni, Josiani; Rodrigues, Ana Lúcia S; Walz, Roger; Teixeira, Edson H; Nascimento, Kyria S; Cavada, Benildo S; Leal, Rodrigo B

    2014-12-01

    In the central nervous system, many receptors, ion channels and neurotransmitter transporters are glycoproteins, where the glycan chains are modulator elements. Lectins are proteins, which recognize and bind carbohydrate complexes. We have previously shown that ConBr, a lectin purified from Canavalia brasiliensis seeds, produced antidepressant-like effect and blocked hippocampal neurotoxicity induced by quinolinic acid and glutamate. Noteworthy, all these effects occurred in a dependence of its carbohydrate recognition domain. Therefore, the present study was undertaken in order to elucidate intracellular signaling pathways regulated by ConBr that may be potentially associated with the antidepressant and neuroprotective effects previously reported to be dependent on carbohydrate interaction. ConBr (10?µg/site) was injected into the ventricle (i.c.v.) of mice, and the hippocampi were removed 0.5, 1, 3, 6, 8, 12, 18, and 24?h after treatment. Our results showed that in the period of 0.5-3?h, ConBr induced activation of the protein kinases Akt, ERK1, and PKA. Furthermore, the phosphorylation of CREB-Ser133 was stimulated by ConBr (1-6?h), while brain-derived neurotrophic factor (BDNF) mRNA was increased at 12?h and BDNF protein at 18-24?h. Our data suggest that an early activation of protein kinases may trigger CREB-dependent BDNF transcription, resulting in a subsequent increase of BDNF protein in response to ConBr. Later, increment of Akt phosphorylation was observed 24?h after ConBr administration, possibly due to BDNF/TrkB-dependent activation of Akt. Our findings indicate that ConBr is a multifunctional molecule capable to activate signaling pathways involved in neuroplasticity and neuroprotection. PMID:25319623

  17. 15/01/2004 00101 Marcare con una crocetta le risposte ritenute corrette e consegnare la scheda al termine della prima

    E-print Network

    Frosini, Patrizio

    A, B e C tre matrici reali n × n regolari. Quali delle seguenti affermazioni sono vere? A) A · B · C reali di grado strettamente superiore al quarto. B) insieme delle quintuple di numeri reali (x1, x2, x3, x4, x5) con x1 + x2 + x3 + x4 + x5 = 0. C) insieme delle matrici reali 2 × 2 con determinante nullo

  18. Pros and Cons of Using Arrays of Small Antennas Versus Large Single Dish Antennas for the Deep Space Network

    NASA Technical Reports Server (NTRS)

    Bagri, Durgadas S.

    2009-01-01

    This paper briefly describes pros and cons of using arrays of small antennas instead of large single dish antennas for spacecraft telemetry, command, and tracking (TT and C) - communications and navigation (C and N) - and science support that the Deep Space Network (DSN) normally provides. It considers functionality and performance aspects, mainly for TT and C, though it also considers science. It only briefly comments on the cost aspects that seem to favor arrays of small antennas over large single antennas, at least for receiving (downlinks).

  19. Modelo de accesibilidad de conceptos matematicos aplicados en el curso de Astronomia Descriptiva para estudiantes con impedimentos visuales en la UPR

    NASA Astrophysics Data System (ADS)

    Isidro Villamizar, Gloria Maria

    Este estudio utiliza metodologia de investigacion cualitativa, con el proposito de describir, analizar y evaluar los procesos de diseno y desarrollo de un modelo de accesibilidad que consiste en estrategias de ensenanza de las matematicas para estudiantes con impedimentos visuales matriculados en el curso de Astronomia Descriptiva en la UPR. Se utilizaron las siguientes estrategias para recopilar la informacion, 1) reflexiones de la investigadora en el proceso de diseno y desarrollo de las lecciones adaptadas, que se registraron en un diario reflexivo. 2) entrevista semiestructurada luego de haber trabajado las lecciones de aprendizaje adaptadas con los participantes. 3) observaciones y notas de la investigadora del trabajo de los participantes. Para obtener la informacion de los participantes se obtuvo los permisos institucionales necesarios; se seleccionaron los participantes y se validaron los instrumentos; se realizo el desarrollo de las lecciones adaptadas con los participantes; y finalmente, se analizo la informacion obtenida. El diseno de las lecciones de aprendizaje adaptadas se hizo siguiendo las recomendaciones curriculares de los temas de matematicas aplicados en el curso de Astronomia Descriptiva realizado por la investigadora durante su semestre de internado. El testimonio de las voces de los participantes se obtuvo del proceso de desarrollo de las lecciones de aprendizaje adaptadas de temas seleccionados de conceptos matematicos requeridos en el curso de Astronomia Descriptiva y de la entrevista semiestructurada con los participantes, luego de haber trabajado las lecciones de aprendizaje. Para el desarrollo de las lecciones de aprendizaje, se utilizaron materiales tactiles adaptados, materiales tactiles disenados y materiales disponibles comercialmente. Los textos de las lecciones se imprimieron en tinta y en Braille. Se exhorta a disenar y desarrollar estrategias de ensenanza accesibles, considerando como recursos para evaluar su efectividad a personas con impedimentos visuales. El utilizar estrategias de aprendizaje accesibles de acuerdo a las necesidades individuales de los estudiantes, contribuye para que los estudiantes con impedimentos visuales descubran, exploren, investiguen y formulen sus propias conclusiones durante su proceso de aprendizaje.

  20. Accurate macromolecular crystallographic refinement: incorporation of the linear scaling, semiempirical quantum-mechanics program DivCon into the PHENIX refinement package

    SciTech Connect

    Borbulevych, Oleg Y.; Plumley, Joshua A.; Martin, Roger I.; Merz, Kenneth M. Jr; Westerhoff, Lance M.

    2014-05-01

    Semiempirical quantum-chemical X-ray macromolecular refinement using the program DivCon integrated with PHENIX is described. Macromolecular crystallographic refinement relies on sometimes dubious stereochemical restraints and rudimentary energy functionals to ensure the correct geometry of the model of the macromolecule and any covalently bound ligand(s). The ligand stereochemical restraint file (CIF) requires a priori understanding of the ligand geometry within the active site, and creation of the CIF is often an error-prone process owing to the great variety of potential ligand chemistry and structure. Stereochemical restraints have been replaced with more robust functionals through the integration of the linear-scaling, semiempirical quantum-mechanics (SE-QM) program DivCon with the PHENIX X-ray refinement engine. The PHENIX/DivCon package has been thoroughly validated on a population of 50 protein–ligand Protein Data Bank (PDB) structures with a range of resolutions and chemistry. The PDB structures used for the validation were originally refined utilizing various refinement packages and were published within the past five years. PHENIX/DivCon does not utilize CIF(s), link restraints and other parameters for refinement and hence it does not make as many a priori assumptions about the model. Across the entire population, the method results in reasonable ligand geometries and low ligand strains, even when the original refinement exhibited difficulties, indicating that PHENIX/DivCon is applicable to both single-structure and high-throughput crystallography.

  1. Protective Effects of Astaxanthin on ConA-Induced Autoimmune Hepatitis by the JNK/p-JNK Pathway-Mediated Inhibition of Autophagy and Apoptosis

    PubMed Central

    Liu, Tong; Wang, Junshan; Dai, Weiqi; Wang, Fan; Zheng, Yuanyuan; Chen, Kan; Li, Sainan; Abudumijiti, Huerxidan; Zhou, Zheng; Wang, Jianrong; Lu, Wenxia; Zhu, Rong; Yang, Jing; Zhang, Huawei; Yin, Qin; Wang, Chengfen; Zhou, Yuqing; Lu, Jie; Zhou, Yingqun; Guo, Chuanyong

    2015-01-01

    Objective Astaxanthin, a potent antioxidant, exhibits a wide range of biological activities, including antioxidant, atherosclerosis and antitumor activities. However, its effect on concanavalin A (ConA)-induced autoimmune hepatitis remains unclear. The aim of this study was to investigate the protective effects of astaxanthin on ConA-induced hepatitis in mice, and to elucidate the mechanisms of regulation. Materials and Methods Autoimmune hepatitis was induced in in Balb/C mice using ConA (25 mg/kg), and astaxanthin was orally administered daily at two doses (20 mg/kg and 40 mg/kg) for 14 days before ConA injection. Levels of serum liver enzymes and the histopathology of inflammatory cytokines and other maker proteins were determined at three time points (2, 8 and 24 h). Primary hepatocytes were pretreated with astaxanthin (80 ?M) in vitro 24 h before stimulation with TNF-? (10 ng/ml). The apoptosis rate and related protein expression were determined 24 h after the administration of TNF-?. Results Astaxanthin attenuated serum liver enzymes and pathological damage by reducing the release of inflammatory factors. It performed anti-apoptotic effects via the descending phosphorylation of Bcl-2 through the down-regulation of the JNK/p-JNK pathway. Conclusion This research firstly expounded that astaxanthin reduced immune liver injury in ConA-induced autoimmune hepatitis. The mode of action appears to be downregulation of JNK/p-JNK-mediated apoptosis and autophagy. PMID:25761053

  2. Estudio de la influencia de la refrigeracion con aire de forma natural e inducida en el comportamiento de instalaciones fotovoltaicas

    NASA Astrophysics Data System (ADS)

    Mazon Hernandez, Rocio

    The aim is to analyse the negative influence of high panel temperatures on electrical production when they are placed on steel roofs of industrial buildings and greenhouse roofs. Different configurations have been tested in order to allow cooling of photovoltaic panels to decrease panel temperature and improve electrical performance. To research this problem two experimental facilities have been built. The first facility includes two panels fixed on a structure. A panel is integrated on a parallel steel plate which does not allow sufficient cooling. Between both surfaces, there is an open air channel in which an air flow is created by the chimney effect thus cooling the panel by natural convection or inducing air, using a fan, by forced convection. The other panel has not any plate underneath it and is used as a referent. The electrical behaviour of the integrated panel has been studied for different air gaps and induced velocities, being also compared with the reference panel. An experimental model was developed to establish correlations which allow determine the panel temperature depending on the influential variables on the cooling ability. This research also analyses the data of a working solar plant, with the same panel model, obtaining the correlations between electrical variables and panel temperature. A comparison with the electrical behaviour in the experimental facility and the solar plant is also presented. The second experimental facility is a replica of a photovoltaic greenhouse. It consists of four photovoltaic panels placed on the plastic roof, providing an open and divergent channel between both surfaces thus creating an air flow by natural convection. This research studies the effect of high temperatures within the greenhouse which is transferred by the roof and thus affects the electrical production. In addition, two air gaps were used and the effect of adding insulating material to the plastic roof was studied. The electrical variables of the panels are analysed to compare and select the best configuration. The presented research provides a deep knowledge of how they work as well as information and results for an improvement in future designs of building integrated photovoltaic systems. Este estudio se centra en analizar la influencia negativa de la temperatura en la produccion electrica de paneles fotovoltaicos al estar emplazados sobre cubierta de acero, como sucede en naves industriales y sobre un invernadero. Se estudian diferentes configuraciones que permitan refrigerar los paneles, reduciendo su temperatura y mejorar su rendimiento. Para abordar este problema, se han construido dos instalaciones experimentales, fieles a plantas solares en funcionamiento. Una instalacion engloba dos paneles fotovoltaicos sobre estructura fija al suelo. Uno de los paneles esta integrado sobre una superficie paralela y metalica. Entre ambas superficies existe un espacio que posibilita circular aire, permitiendo refrigerar el panel por conveccion natural, o conveccion forzada impulsando el aire con un ventilador. El otro panel, libre por su cara posterior y se ha considerado de referencia. Se ha estudiado el comportamiento del panel integrado sobre cubierta para diferentes secciones de aire y velocidades inducidas, comparandolo con el panel de referencia. Se ha desarrollado un modelo experimental que nos permite determinar la temperatura del panel en funcion de las variables que influyen en su refrigeracion. Adicionalmente, se han analizado los datos de una planta solar en funcionamiento, con paneles de igual caracteristicas, obteniendo correlaciones entre la temperatura del panel y las variables electricas y comparandolos con las obtenidas en la instalacion experimental. La segunda instalacion experimental reproduce parte de una instalacion solar sobre un invernadero, formada por cuatro paneles fotovoltaicos colocados sobre el plastico del invernadero, existiendo un canal divergente entre ambas superficies. Se estudia la influencia de las altas temperaturas en el interior del invernadero sobre la produccion electric

  3. Concepciones Alternativas de "Fotosintesis" en estudiantes Universitarios del curso basico de Biologia y posibles correcciones con el Modelo Educativo MODEF

    NASA Astrophysics Data System (ADS)

    De Jesus Roman, Sandra

    Concepciones Alternativas de Fotosíntesis en estudiantes Universitariosdel curso básico de Biología y posibles correcciones con el Modelo Educativo MODEF El modelo educativo para la enseñanza de Fotosíntesis (MODEF) se implantó para trabajar el problema de las concepciones alternativas (CA) en un curso de Biología General. Se evaluaron los resultados en cuanto al logro del aprendizaje significativo. La pregunta central de la investigación fue: ¿Cómo aporta el modelo educativo en la didáctica y comprensión del tema de fotosíntesis? Se efectuó una investigación acción con una fase cuantitativa y una cualitativa. Para la fase cuantitativa se elaboró una prueba para determinar las concepciones alternativas, se validó y se sometió a los estudiantes que participaron en el estudio antes y después de ofrecer la unidad de metabolismo celular. Los participantes eran estudiantes de primer año de la Universidad de Puerto Rico en Bayamón (UPRB). Se llevó a cabo un análisis de consistencia interna de la prueba mediante el método Alfa de Cronbach. Se analizaron las contestaciones a cada pregunta mediante la prueba de Ji cuadrado de contingencia, se efectuó la prueba de t y el coeficiente r de Pearson. La fase cualitativa incluyó la observación participativa de la investigadora- profesora, las reflexiones de los estudiantes y la información de las entrevistas semi-estructuradas que se realizaron a tres estudiantes del curso. El análisis se llevó a cabo mediante el Modelo de Wolcott. Se trabajaron diez CA de las cuales siete fueron corregidas mediante el Modelo MODEF. Las actividades más importantes para el proceso de aprendizaje incluyeron el trabajo de investigación o búsqueda de información para hacer una presentación digital, la elaboración de tablas, los mapas de conceptos, el uso de visuales o videos y las analogías para explicar conceptos o procesos. En conclusión: se recomienda el uso del Modelo MODEF para la discusión del tema de Fotosíntesis a base de los resultados cuantitativos y cualitativos de esta investigación. El Comité Institucional para la Protección de los Seres Humanos en la Investigación (CIPSHI) autorizó el estudio.

  4. Binding of NIR-conPK and NIR-6T to Astrocytomas and Microglial Cells: Evidence for a Protein Related to TSPO

    PubMed Central

    Sexton, Michelle; Woodruff, Grace; Cudaback, Eiron; Kreitzer, Faith R.; Xu, Cong; Lin, Yi Hsing; Möller, Thomas; Bai, Mingfeng; Manning, H. Charles; Bornhop, Darryl; Stella, Nephi

    2009-01-01

    PK 11195 and DAA1106 bind with high-affinity to the translocator protein (TSPO, formerly known as the peripheral benzodiazepine receptor). TSPO expression in glial cells increases in response to cytokines and pathological stimuli. Accordingly, [11C]-PK 11195 and [11C]-DAA1106 are recognized molecular imaging (MI) agents capable of monitoring changes in TSPO expression occurring in vivo and in response to various neuropathologies. Here we tested the pharmacological characteristics and TSPO-monitoring potential of two novel MI agents: NIR-conPK and NIR-6T. NIR-conPK is an analogue of PK 11195 conjugated to the near-infrared (NIR) emitting fluorophore: IRDye 800CW. NIR-6T is a DAA1106 analogue also conjugated to IRDye 800CW. We found that NIR-6T competed for [3H]-PK 11195 binding in astrocytoma cell homogenates with nanomolar affinity, but did not exhibit specific binding in intact astrocytoma cells in culture, indicating that NIR-6T is unlikely to constitute a useful MI agent for monitoring TSPO expression in intact cells. Conversely, we found that NIR-conPK did not compete for [3H]-PK 11195 binding in astrocytoma cell homogenate, but exhibited specific binding in intact astrocytoma cells in culture with nanomolar affinity, suggesting that NIR-conPK binds to a protein distinct, but related to, TSPO. Accordingly, treating intact astrocytoma cells and microglia in culture with cytokines led to significant changes in the amount of NIR-conPK specific binding without corresponding change in TSPO expression. Remarkably, the cytokine-induced changes in the protein targeted by NIR-conPK in intact microglia were selective, since IFN-? (but not TNF? and TGF?) increased the amount of NIR-conPK specific binding in these cells. Together these results suggest that NIR-conPK binds to a protein that is related to TSPO, and expressed by astrocytomas and microglia. Our results also suggest that the expression of this protein is increased by specific cytokines, and thus allows for the monitoring of a particular subtype of microglia activation. PMID:20020060

  5. Inversor Resonante de Tres Elementos L-LC con Caracteristica Cortocircuitable para Aplicaciones de Calentamiento por Induccion

    NASA Astrophysics Data System (ADS)

    Espi Huerta, Jose Miguel

    Los generadores de calentamiento por induccion son puentes inversores con carga resonante, cuya mision es basicamente crear una corriente sinusoidal de gran amplitud sobre la "bobina de caldeo", que forma parte del tanque resonante. En el interior de esta bobina se introduce la pieza que se desea calentar. EI campo magnetico creado induce corrientes superficiales (corrientes de Foucault) sobre la pieza, que producen su calentamiento. Los tanques resonantes (tambien llamados osciladores) utilizados en la actualidad son el resonante serie y el resonante paralelo. Aunque ya desde hace algun tiempo se vienen construyendo generadores de alta potencia basados en estos dos osciladores, el exito nunca ha. sido completo en ninguno de los dos casos. Tal y como se explica en la introduccion de esta memoria, los puentes inversores utilizados deben operar sobre una carga inductiva (corriente retrasada) para evitar el fenomeno de la recuperacion inversa de sus diodos y la consiguiente ruptura de los transistores. De la restriccion topologica anterior se deduce que el generador paralelo debe conmutar a frecuencias inferiores a la resonancia, y el serie a frecuencias superiores. A esta restriccion topologica hay que unir otra que es exclusiva del calentamiento por induccion: La corriente por la bobina de caldeo debe ser sinusoidal. De no ser asi, resultaria imposible disponer toda la potencia de calentamiento sobre la pieza en el espesor requerido por la aplicacion. Como consecuencia, los inversores no pueden operar por debajo de la frecuencia de resonancia del oscilador, pues en ese caso se amplifican los armonicos de orden superior de la tension/corriente de entrada situados sobre la resonancia, con la consiguiente distorsion de la corriente de salida. La conjuncion de las dos restricciones anteriores obligan al inversor paralelo a funcionar a la frecuencia de resonancia del oscilador. Esto imposibilita un control por variacion de frecuencia, regulandose la potencia desde la seccion de entrada mediante un mayor o menor aporte de corriente al puente. Como consecuencia, la seccion de entrada del paralelo, ya de por si mas voluminosa que lao del serie por el uso de grandes componentes magneticos (bobinas de filtro o de "alisamiento"), result a tambien mas complicada y costosa debido a la necesidad de ser implementada mediante rectificador controlado. Ademas, la regulacion que ofrece el rectificador es pobre, dada su baja frecuencia de conmutacion. En cambio, el circuito serie puede funcionar por encima de la resonancia manteniendo una secuencia de conmutacion sin riesgos de recuperacion inversa y con una corriente de salida practicamente sinusoidal, lo que permite un control de la potencia por variacion de frecuencia. Puesto que la tarea de regulacion se realiza desde el puente inversor, la regulacion resulta mucho mas eficaz y la seccion de entrada se puede implementar mediante un simple rectificador no controlado y un condensador de filtro. (Abstract shortened by UMI.).

  6. Accurate macromolecular crystallographic refinement: incorporation of the linear scaling, semiempirical quantum-mechanics program DivCon into the PHENIX refinement package

    PubMed Central

    Borbulevych, Oleg Y.; Plumley, Joshua A.; Martin, Roger I.; Merz, Kenneth M.; Westerhoff, Lance M.

    2014-01-01

    Macromolecular crystallographic refinement relies on sometimes dubious stereochemical restraints and rudimentary energy functionals to ensure the correct geometry of the model of the macromolecule and any covalently bound ligand(s). The ligand stereochemical restraint file (CIF) requires a priori understanding of the ligand geometry within the active site, and creation of the CIF is often an error-prone process owing to the great variety of potential ligand chemistry and structure. Stereochemical restraints have been replaced with more robust functionals through the integration of the linear-scaling, semiempirical quantum-mechanics (SE-QM) program DivCon with the PHENIX X-ray refinement engine. The PHENIX/DivCon package has been thoroughly validated on a population of 50 protein–ligand Protein Data Bank (PDB) structures with a range of resolutions and chemistry. The PDB structures used for the validation were originally refined utilizing various refinement packages and were published within the past five years. PHENIX/DivCon does not utilize CIF(s), link restraints and other parameters for refinement and hence it does not make as many a priori assumptions about the model. Across the entire population, the method results in reasonable ligand geometries and low ligand strains, even when the original refinement exhibited difficulties, indicating that PHENIX/DivCon is applicable to both single-structure and high-throughput crystallography. PMID:24816093

  7. Synthesis of water-soluble Ag?Se QDs as a novel resonance Rayleigh scattering sensor for highly sensitive and selective ConA detection.

    PubMed

    Yan, Shuguang; Zhang, Lichun; Tang, Yurong; Lv, Yi

    2014-09-01

    Ag2Se quantum dots (QDs) have attracted a lot of interest due to their potential applications in biosensing and bioimaging. A strategy is presented that involves coupling of selenium powder reduction with the binding of silver ions, and thioglycollic acid (TGA) and glycine as stabilizers to obtain ultrasmall Ag2Se QDs at 85 °C in aqueous solution. This strategy avoids high temperatures, high pressures and organic solvents so that water-soluble 3 nm Ag2Se QDs can be directly obtained. The conjugation of ConA to TGA stabilized Ag2Se QDs by hydrogen bonds leads to the adsorption of ConA to Ag2Se QDs and forms the aggregation and leads to the generation of resonance Rayleigh scattering (RRS) as a readout signal for the sensing events. The reaction mechanism of Ag2Se QD RRS enhancement is studied in this work. The resulting RRS sensor enables the detection of ConA with limit of detection reaching 0.08 ?g mL(-1) concentration in a wide linear range from 0.27 ?g mL(-1) to 35 ?g mL(-1). The recovery of spiked ConA in human serum samples ranges from 94% to 106%. The relative standard deviation (RSD) for eleven replicate detections is 3.6%. Our results correlate many important experimental observations and will fuel the further growth of this field. PMID:24957549

  8. DE LEO N, A. R., AND J. G. BRAUN. 1973. Ciclo anual de la prod-uccion primaria y su relacion con los nutrientes en aguas Can-

    E-print Network

    Cochlan, William P.

    . Is the open ocean heterotrophic? Science 284: 1735b. FISHER, G., S. NEUER, AND G. WEFER. 1996. Short. LEB. 1998. The balance of plankton respiration and photosynthesis in the open ocean. Nature 394: 55 relacio´n con los nutrientes en aguas Can- arias. Bol. Inst. Esp. Ocean. 167: 1­24. DEL GIORGIO, P. A., J

  9. AVISO EN CONTRA DE ACTOS DISCRIMINATORIOS De conformidad con la Ley de Derechos Humanos del Distrito de Columbia (D.C.) de 1977, segn enmendada,

    E-print Network

    AVISO EN CONTRA DE ACTOS DISCRIMINATORIOS De conformidad con la Ley de Derechos Humanos del a medidas disciplinarias. La Ley de Derechos Humanos del Distrito de Columbia (D.C.), Sección 2-1402.31(a discriminar: "Negarle a una persona, de forma directa o indirecta, el derecho a disfrutar a plenitud y

  10. _Page 4 -Section A-Thursday, May 1,2008 -THE MENDOCINO BEACON ~J"f~~CON~: : . ACoast Paper For Coast PeopleSince 1877

    E-print Network

    Nielsen, Karina J.

    f: a:.(, _Page 4 - Section A- Thursday, May 1,2008 - THE MENDOCINO BEACON ~J"f~~CON~: : . ACoast "-(707) 964-5642· Fax 964-0424· Email: beacon@mcn.org Community Forum By Karina J. Nielsen, Ph.D. What do

  11. Kurt J. Koester To obtain a position that allows me to use my skills and knowledge in materials science to con-

    E-print Network

    Ritchie, Robert

    in materials science to con- duct research and develop new products and technologies. EDUCATION: 2003-2007 University of California, Berkeley Berkeley, CA Doctor of Philosophy, Engineering, Materials Science and Engineering Minors: Bioengineering and Business Administration Master of Engineering, Materials Science

  12. PROBITICOS Y PREBITICOS. IMPACTO EN LA SALUD. El estudio de probiticos y prebiticos con el fin de profundizar en el papel que ejercen en la salud humana.

    E-print Network

    PROBIÓTICOS Y PREBIÓTICOS. IMPACTO EN LA SALUD. El estudio de probióticos y prebióticos con el fin de profundizar en el papel que ejercen en la salud humana. El curso engloba dos grandes temáticas. Por una parte, se pretende ahondar en el concepto de bacterias probióticas y su impacto sobre la salud

  13. L'Internet-dipendenza aumenta l'impulsivit I risultati di uno studio coordinato dall'Universit degli Studi di Milano, con Swansea University e

    E-print Network

    Olivares, Stefano

    relazione fra Internet addiction, depressione e impulsività, in modo da produrre un quadro globale degli'ulteriore validazione del costrutto di Internet Addiction Disorder, suggeriscono che gli individui con dipendenza daL'Internet-dipendenza aumenta l'impulsività I risultati di uno studio coordinato dall

  14. Adipose tissue derived stromal stem cell therapy in murine ConA-derived hepatitis is dependent on myeloid-lineage and CD4+ T-cell suppression.

    PubMed

    Higashimoto, Mami; Sakai, Yoshio; Takamura, Masayuki; Usui, Soichiro; Nasti, Alessandro; Yoshida, Keiko; Seki, Akihiro; Komura, Takuya; Honda, Masao; Wada, Takashi; Furuichi, Kengo; Ochiya, Takahiro; Kaneko, Shuichi

    2013-11-01

    Mesenchymal stromal stem cells (MSCs) are an attractive therapeutic model for regenerative medicine due to their pluripotency. MSCs are used as a treatment for several inflammatory diseases, including hepatitis. However, the detailed immunopathological impact of MSC treatment on liver disease, particularly for adipose tissue derived stromal stem cells (ADSCs), has not been described. Here, we investigated the immuno-modulatory effect of ADSCs on hepatitis using an acute ConA C57BL/6 murine hepatitis model. i.v. administration of ADSCs simultaneously or 3 h post injection prevented and treated ConA-induced hepatitis. Immunohistochemical analysis revealed higher numbers of CD11b(+), Gr-1(+), and F4/80(+) cells in the liver of ConA-induced hepatitis mice was ameliorated after the administration of ADSCs. Hepatic expression of genes affected by ADSC administration indicated tissue regeneration-related biological processes, affecting myeloid-lineage immune-mediating Gr-1(+) and CD11b(+) cells. Pathway analysis of the genes expressed in ADSC-treated hepatic inflammatory cells revealed the possible involvement of T cells and macrophages. TNF-? and IFN-? expression was downregulated in hepatic CD4(+) T cells isolated from hepatitis livers co-cultured with ADSCs. Thus, the immunosuppressive effect of ADSCs in a C57BL/6 murine ConA hepatitis model was dependent primarily on the suppression of myeloid-lineage cells and, in part, of CD4(+) T cells. PMID:23934743

  15. IEEE TRANSACTIONS ON INFORMATION THEORY, VOL. 46, NO. 5, AUGUST 2000 1927 In this correspondence we have not addressed the problem of con-

    E-print Network

    Chang, Chein-I

    IEEE TRANSACTIONS ON INFORMATION THEORY, VOL. 46, NO. 5, AUGUST 2000 1927 In this correspondence we have not addressed the problem of con- structing actual codebooks. Information theory indicates that, Information Theory and Reliable Communica- tion. New York: Wiley, 1968. [10] T. Cover and J. Thomas, Elements

  16. Una Gua para Convivir con Felinos Silvestres1 Autores: Venetia S. Briggs, Rebecca G. Harvey, Frank J. Mazzotti, y William M. Giuliano;

    E-print Network

    Mazzotti, Frank

    WEC316 Una Guía para Convivir con Felinos Silvestres1 Autores: Venetia S. Briggs, Rebecca G. Harvey, Frank J. Mazzotti, y William M. Giuliano; Traducido por: Sergio C. Gonzalez y Luz D. Barrantes Postdoctoral; Rebecca G. Harvey, Coordinadora de Educación Ambiental; y Frank J. Mazzotti, Profesor Asociado

  17. Informe del Consejo Rector del CSIC del 30092014 El Consejo Rector se celebr el 30 de septiembre de 2014 y la sesin se inici con un amplio y

    E-print Network

    Fitze, Patrick

    1 Informe del Consejo Rector del CSIC del 30092014 El Consejo Rector se celebró el 30 de septiembre de 2014 y la sesión se inició con un amplio y detallado informe del programa de actividades en torno al 75 aniversario del CSIC, cuyo acto central se celebrará el 24

  18. 19 gennaio 2007 N. di Matricola: 00101 Marcare con una crocetta le risposte ritenute corrette e consegnare la scheda al termine della prima

    E-print Network

    Frosini, Patrizio

    'insieme delle matrici reali 4 × 4 con traccia positiva `e un gruppo rispetto alla usuale ope- razione di usuali operazioni di somma e prodotto per uno scalare. b) l'insieme delle matrici reali 5 × 5 simmetriche successioni reali a coefficienti tutti diversi da zero, dotato delle usuali opera- zioni di somma e prodotto

  19. Pure Appl. Chem., Vol. 82, No. 12, pp. 22472279, 2010. doi:10.1351/PAC-CON-10-09-04

    E-print Network

    Martin, Jan M.L.

    2247 Pure Appl. Chem., Vol. 82, No. 12, pp. 2247­2279, 2010. doi:10.1351/PAC-CON-10-09-04 © 2010 to the trans form once the UV source is removed. Although this thermal re-isomerization is slow, *Pure Appl

  20. x1 PICTURES INTRODUCTION AND MAIN DATA STRUCTURES* 1. Introduction and main data structures. This is the file pictures.wthat con*

    E-print Network

    van Leeuwen, Marc

    x1 PICTURES INTRODUCTION AND MAIN DATA STRUCTURES* * 1 1. Introduction and main data structures. This is the file pictures.wthat con* *tains the central part to manipulate mathematical "pictures" as defined in [Zel]. That library, which is * *contained in the file pict

  1. RICHIESTA INCENTIVO PER UTILIZZO SERVIZIO CAR SHARING per aziende con Mobility Manager nominato (ai sensi della D.D. 1487 del 30/12/2010)

    E-print Network

    Di Pillo, Gianni

    rinnovo, va inviata, anche via fax, all'ufficio Car Sharing di Roma Servizi per la Mobilità In fede Data __________________________________ ______________________________ RISERVATO ALL'UFFICIO Data .................. VALIDAZIONE U.O. MOB. SOST. VALIDAZIONE Ufficio CAR SHARINGRICHIESTA INCENTIVO PER UTILIZZO SERVIZIO CAR SHARING per aziende con Mobility Manager nominato (ai

  2. Circulating microRNA Biomarkers as Liquid Biopsy for Cancer Patients: Pros and Cons of Current Assays

    PubMed Central

    Ono, Shigeshi; Lam, Stella; Nagahara, Makoto; Hoon, Dave S. B.

    2015-01-01

    An increasing number of studies have focused on circulating microRNAs (cmiRNA) in cancer patients’ blood for their potential as minimally-invasive biomarkers. Studies have reported the utility of assessing specific miRNAs in blood as diagnostic/prognostic biomarkers; however, the methodologies are not validated or standardized across laboratories. Unfortunately, there is often minimum limited overlap in techniques between results reported even in similar type studies on the same cancer. This hampers interpretation and reliability of cmiRNA as potential cancer biomarkers. Blood collection and processing, cmiRNA extractions, quality and quantity control of assays, defined patient population assessment, reproducibility, and reference standards all affect the cmiRNA assay results. To date, there is no reported definitive method to assess cmiRNAs. Therefore, appropriate and reliable methodologies are highly necessary in order for cmiRNAs to be used in regulated clinical diagnostic laboratories. In this review, we summarize the developments made over the past decade towards cmiRNA detection and discuss the pros and cons of the assays. PMID:26512704

  3. Evaluation of GO_CONS_GCF_2_TIM and GOCO01S Geopotential Models in Venezuela and Caribbean Region

    NASA Astrophysics Data System (ADS)

    Orihuela, N. D.; Garcia, A. D.; Tabare, T.; Scientific Team Of Venezuelan; Caribbean Crustal Study From Satellital Data

    2010-12-01

    This paper shows two maps of the magnitude of the surface gravity vector (MSGV) of Venezuela and Caribbean region at 1:500.000 scale in the geographic window between the 0-20 north latitude and 74-58 western longitude (Fig. 1 and Fig. 2), that were generated from GOCE gravity gradients data provided by the European Space Agency (ESA). The maps that are showed come from the combined global gravity field model GOCO01s [GOCO Consortium., 2010] and from the satellite-only global gravity field model GO_CONS_GCF_2_TIM [Pail et al., 2010], both of 224 degree. The DEMs used for the evaluation of the MSGV are: Etopo2v2 [NGDC., 2006] and Etopo1 [Amante and Eakins, 2009] respectively. The data processing was done using: Shm2func [ICGEM., 2007]; Goce User Toolbox [ESA., 2009]; Gravsoft package [Tscherning et al., 1992] and Oasis Montaj (Geosoft). This research shows a review of observed gravity in the main geological provinces of the Venezuela and Caribbean region geography, revealing gravitational features important of the geological structures that are in Venezuelan and Caribbean subsurface.

  4. Laboratory simulation of Kuiper belt object volatile ices under ionizing radiation: CO-N2 ices as a case study.

    PubMed

    Kim, Y S; Zhang, F; Kaiser, R I

    2011-09-21

    The exposure of icy Kuiper belt objects (KBOs) by ionizing radiation was simulated in this case of exposing carbon monoxide-nitrogen (CO-N(2)) ices by energetic electrons. The radiation-induced chemical processing was monitored on-line and in situ via FTIR spectroscopy and quadrupole mass spectrometry. Besides the array of carbon oxides being reproduced as in neat irradiated carbon monoxide (CO) ices studied previously, the radiation exposure at 10 K resulted in the formation of nitrogen-bearing species of isocyanato radical (OCN), linear (l-NCN), nitric oxide (NO), nitrogen dioxide (NO(2)), plus diazirinone (N(2)CO). The infrared assignments of these species were further confirmed by isotopic shifts. The temporal evolution of individual species was found to fit in first-order reaction schemes, prepping up the underlying non-equilibrium chemistry on the formation of OCN, l-NCN, and NO radicals in particular. Also unique to the binary KBO model ices and viable for the future remote detection is diazirinone (N(2)CO) at 1860 cm(-1) (2?(5)) formed at lower radiation exposure. PMID:21687881

  5. Air Traffic Management Technology Demonstration-1 Concept of Operations (ATD-1 ConOps), Version 2.0

    NASA Technical Reports Server (NTRS)

    Baxley, Brian T.; Johnson, William C.; Swenson, Harry N.; Robinson, John E.; Prevot, Tom; Callantine, Todd J.; Scardina, John; Greene, Michael

    2013-01-01

    This document is an update to the operations and procedures envisioned for NASA s Air Traffic Management (ATM) Technology Demonstration #1 (ATD-1). The ATD-1 Concept of Operations (ConOps) integrates three NASA technologies to achieve high throughput, fuel-efficient arrival operations into busy terminal airspace. They are Traffic Management Advisor with Terminal Metering (TMA-TM) for precise time-based schedules to the runway and points within the terminal area, Controller-Managed Spacing (CMS) decision support tools for terminal controllers to better manage aircraft delay using speed control, and Flight deck Interval Management (FIM) avionics and flight crew procedures to conduct airborne spacing operations. The ATD-1 concept provides de-conflicted and efficient operations of multiple arrival streams of aircraft, passing through multiple merge points, from top-of-descent (TOD) to the Final Approach Fix. These arrival streams are Optimized Profile Descents (OPDs) from en route altitude to the runway, using primarily speed control to maintain separation and schedule. The ATD-1 project is currently addressing the challenges of integrating the three technologies, and their implantation into an operational environment. The ATD-1 goals include increasing the throughput of high-density airports, reducing controller workload, increasing efficiency of arrival operations and the frequency of trajectory-based operations, and promoting aircraft ADS-B equipage.

  6. Structural, electronic and magnetic properties of ConPt, for M=13, 19, and 55, from first principles

    NASA Astrophysics Data System (ADS)

    Montejano-Carrizales, J. M.; Aguilera-Granja, F.; Goyhenex, C.; Pierron-Bohnes, V.; Morán-López, J. L.

    2014-04-01

    The geometrical structure, chemical ordering, electronic and magnetic properties of ConPt, for M=13, 19, and 55, are investigated, within the framework of the density functional theory as implemented in the SIESTA code. For the exchange and correlation potential, we used the Perdew-Burke-Ernzerhof (PBE) form of the generalized gradient approximation (GGA). We considered the hexagonal, the cubo-octahedral (CO), the centered pentagonal prism (CPP), and the icosahedral (ICO) geometries. We found that the CO, ICO, and CPP structures have similar energies and the lowest energy configuration changes as a function of the Co concentration and cluster size. In most of the cases, around the equiatomic concentration, the Co and Pt atoms form chemically ordered structures, but most often not the L10 structure stable in bulk. We observed that the Pt atoms are segregated to the surface in all the concentration range. A detailed analysis of the dependence of the magnetic moment of the components, and their average, as a function of structure and of chemical composition is reported. A strong polarization of the Pt atoms by the nearest neighbor Co atoms is observed.

  7. Document-Level Classification of CT Pulmonary Angiography Reports based on an Extension of the ConText Algorithm

    PubMed Central

    Chapman, Brian E.; Lee, Sean; Kang, Hyunseok Peter; Chapman, Wendy W.

    2011-01-01

    In this paper we describe an application called peFinder for document-level classification of CT pulmonary angiography reports. peFinder is based on a generalized version of the ConText algorithm, a simple text processing algorithm for identifying features in clinical report documents. peFinder was used to answer questions about the disease state (pulmonary emboli present or absent), the certainty state of the diagnosis (uncertainty present or absent), the temporal state of an identified pulmonary embolus (acute or chronic), and the technical quality state of the exam (diagnostic or not diagnostic). Gold standard answers for each question were determined from the consensus classifications of three human annotators. peFinder results were compared to naive Bayes’ classifiers using unigrams and bigrams. The sensitivities (and positive predictive values) for peFinder were 0.98(0.83), 0.86(0.96), 0.94(0.93), and 0.60(0.90) for disease state, quality state, certainty state, and temporal state respectively, compared to 0.68(0.77), 0.67(0.87), 0.62(0.82), and 0.04(0.25) for the naive Bayes’ classifier using unigrams, and 0.75(0.79), 0.52(0.69), 0.59(0.84), and 0.04(0.25) for the naive Bayes’ classifier using bigrams. PMID:21459155

  8. Role of fadR and atoC(Con) mutations in poly(3-hydroxybutyrate-co-3-hydroxyvalerate) synthesis in recombinant pha+ Escherichia coli.

    PubMed

    Rhie, H G; Dennis, D

    1995-07-01

    Recombinant Escherichia coli fadR atoC(Con) mutants containing the polyhydroxyalkanoate (PHA) biosynthesis genes from Alcaligenes eutrophus are able to incorporate significant levels of 3-hydroxyvalerate (3HV) into the copolymer poly(3-hydroxybutyrate-co-3-hydroxyvalerate) [P(3HB-co-3HV)]. We have used E. coli fadR (FadR is a negative regulator of fatty acid oxidation) and E. coli atoC(Con) (AtoC is a positive regulator of fatty acid uptake) mutants to demonstrate that either one of these mutations alone can facilitate copolymer synthesis but that 3HV levels in single mutant strains are much lower than in the fadR atoC(Con) strain. E. coli atoC(Con) mutants were used alone and in conjunction with atoA and atoD mutants to determine that the function of the atoC(Con) mutation is to increase the uptake of propionate and that this uptake is mediated, at least in part, by atoD+. Similarly, E. coli fadR mutants were used alone and in conjunction with fadA, fadB, and fadL mutants to show that the effect of the fadR mutation is dependent on fadB+ and fadA+ gene products. Strains that were mutant in the fadB or fadA locus were unable to complement a PHA biosynthesis pathway that was mutant at the phaA locus (thiolase), but a strain containing a fadR mutation and which was fadA+ fadB+ was able to complement the phaA mutation and incorporated 3HV into P(3HB-co-3HV) to a level of 29 mol%. PMID:7618860

  9. Impact evaluation of an adjustable speed drive installed at Ball-InCon Glass Packaging Corporation under the Energy $avings Plan

    SciTech Connect

    Spanner, G.E.; Sullivan, G.P.

    1993-05-01

    This impact evaluation of an adjustable speed drive that was recently installed at Ball-InCon Glass Packaging Corporation (Ball-InCon) was conducted for the Bonneville Power Administration (Bonneville) as part of an evaluation of its Energy $avings Plan (E$P) Program. The Program makes acquisition payments to firms that install energy conservation projects in their industrial processes. The objective of this impact evaluation was to assess how much electrical energy is being saved at Ball-InCon as a result of the E$P and to determine how much the savings cost Bonneville and the region. The impact of the project was evaluated with a combination of engineering analysis, financial analysis, interviews, and submittal reviews (Ball-InCon`s Abstract, Proposal, and Completion Report). The project consists of switching from inlet guide vanes to adjustable frequency drives for 10 motors that provide cooling air to glass container molds. Based on this impact evaluation, energy savings from this project are expected to be 1,711,500 kWh/yr, or about 0.20 average megawatts. On a per-ton basis, this project will save approximately 7.8 kWh/ton of glass produced. The project cost $182,834 to install, and Ball-InCon received payment of $95,581 from Bonneville for the acquisition of energy savings. The real levelized cost of these energy savings to Bonneville is 5.2 mills/kWh over the projects`s assumed 15-year life, and the levelized cost to the region is 10.7 mills/kWh in 1992 dollars, not including transmission and distribution effects. This project would not have been implemented without the acquisition payment from Bonneville, so all of the energy savings can be attributed to the E$P.

  10. The Classics, Con Brio

    ERIC Educational Resources Information Center

    Hansen, James

    1978-01-01

    Sponsored by a consortium of 30 American universities, Rome's Intercollegiate Center for Classical Studies offers a year of study to American undergraduate classics majors. Instructors are also American and normally stay only a year; teaching assistants are always ex-students of the center. Extensive field trips are an important part of the…

  11. Neo-Conned University

    ERIC Educational Resources Information Center

    Jones, Andee

    2014-01-01

    Censorship, says Australian political theorist John Keane (1991), can "echo within us, take up residence within ourselves, spying on us, a private amanuensis who reminds us never to go too far... It makes us zip our lips, tremble and think twice" (p. 39). It can also make us sick. The author states that this is her argument here: that,…

  12. EthicsConRep

    Cancer.gov

    The authors also gratefully acknowledge the copy editing assistance of Leslie Alter, MPH and Steve Brown. The Ethical Force Program’s initiative on patient-centered communication is funded in part by the American Medical Association Foundation, The California Endowment, the Commonwealth Fund and the Connecticut Health Foundation.

  13. Entrevista con Santiago García

    E-print Network

    Baycroft, Bernard

    1982-04-01

    . Traía toda la disciplina tan apasionante de Stanis lavski. ¿Podría precisar los aportes que su grupo ha hecho al teatro colombiano? Yo creo que el principal aporte que La Candelaria ha hecho al movimiento de SPRING 1982 79 teatro en Colombia, junto...

  14. Adelante con animo

    E-print Network

    McCullough Maker, Kathleen Grace

    1992-01-01

    A proposition of this thesis is that architecture is capable of conveying a sense of animation, movement and energy. These are elusive properties. Their perception perhaps emerges from the building's form or articulation ...

  15. Conversación con Ricardo Monti

    E-print Network

    Driskell, Charles B.

    1979-04-01

    terminan en una nueva opresión. Es una visión bastante escéptica de la Historia, pero yo siento que los ejemplos históricos que uno tiene a mano no dan para otra cosa. Has dicho en otra parte que la teoría de la relatividad y el psicoanálisis abrieron... las puertas de otro universo estético, ¿Podrías ahondar un poco en lo que querías decir? En lo de la teoría de la relatividad y el psicoanálisis, yo mencioné que están marcando un cambio de comprensión del mundo, de la realidad. ... Y esto...

  16. Glass transition temperature and conductivity in Li2O and Na2O doped borophosphate glasses

    NASA Astrophysics Data System (ADS)

    Ashwajeet, J. S.; Sankarappa, T.; Ramanna, R.; Sujatha, T.; Awasthi, A. M.

    2015-08-01

    Two alkali doped Borophosphate glasses in the composition, (B2O3)0.2. (P2O5)0.3. (Na2O)(0.5-x). (Li2O)x, where x = 0.05 to 0.50 were prepared by standard melt quenching method at 1200K. Non-crystalline nature was confirmed by XRD studies. Room temperature density was measured by Archimedes principle. DC conductivity in the temperature range from 300K to 575K has been measured. Samples were DSC studied in the temperature range from 423K to 673K and glass transition temperature was determined. Glass transition temperature passed through minima for Li2O con.2centration between 0.25 and 0.30 mole fractions. Activation energy of conduction has been determined by analyzing temperature variation of conductivity determining Arrhenius law. Conductivity passed through minimum and activation passed through maximum for Li2O content from 0.25 to 0.30 mole fractions. Glass transition temperature passed through minimum for the same range of Li2O content. These results revealed mixed alkali effect taking place in these glasses. It is for the first time borophosphate glasses doped with Li2O and Na2O have been studied for density and dc conductivity and, the mixed alkali effect (MAE) has been observed.

  17. Artesanos, alquimistas, mdicos y filsofos: Introduccin a los orgenes de la quimica El objetivo del curso es proporcionar una visin general del desarrollo de actividades y creencias conectadas con el origen

    E-print Network

    del curso es proporcionar una visión general del desarrollo de actividades y creencias conectadas con propias de cada época. El curso consta de dos bloques docentes. En el primero de ellos se expondrá el con la ciencia, la medicina, y su influencia en el arte y la cultura occidental Título del curso

  18. Science & Consciousness Review Print What's the difference betwee... http://sci-con.org/2003/05/whats-the-difference-between-an-invisible-ho... 1 of 3 1/22/2007 11:49 AM

    E-print Network

    Seth, Anil K.

    /05/whats-the-difference-between-an-invisible-ho... 1 of 3 1/22/2007 11:49 AM - Science & Consciousness;Science & Consciousness Review » Print » What's the difference betwee... http://sci-con.org/2003/05/whats-the-difference-between-an-invisibleScience & Consciousness Review » Print » What's the difference betwee... http://sci-con.org/2003

  19. Procedura di valutazione comparativa per la copertura per titoli e colloquio per il reclutamento di un ricercatore con rapporto di lavoro a tempo determinato -cofinanziato dalla Regione Lazio -presso il dipartimento di Chimica e

    E-print Network

    Di Pillo, Gianni

    un ricercatore con rapporto di lavoro a tempo determinato - cofinanziato dalla Regione Lazio - presso Regolamento relativo al reclutamento di Ricercatori con contratto di lavoro a tempo determinato, ai sensi dell'attivazione delle procedure per il reclutamento di un ricercatore a tempo determinato per il S.S.D. CHIM/09 Visto il

  20. Procedura di valutazione comparativa per la copertura per titoli e colloquio per il reclutamento di un ricercatore con rapporto di lavoro a tempo determinato -cofinanziato dalla Regione Lazio -presso il dipartimento di Chimica e

    E-print Network

    Di Pillo, Gianni

    un ricercatore con rapporto di lavoro a tempo determinato - cofinanziato dalla Regione Lazio - presso Regolamento relativo al reclutamento di Ricercatori con contratto di lavoro a tempo determinato, ai sensi dell'attivazione delle procedure per il reclutamento di un ricercatore a tempo determinato per il S.S.D. CHIM/08 Visto il

  1. An inevitable wave of prescription drug monitoring programs in the context of prescription opioids: pros, cons and tensions

    PubMed Central

    2014-01-01

    Background In an effort to control non-medical use and/or medical abuse of prescription drugs, particularly prescription opioids, electronic prescription drug monitoring programs (PDMP) have been introduced in North-American countries, Australia and some parts of Europe. Paradoxically, there are simultaneous pressures to increase opioid prescribing for the benefit of individual patients and to reduce it for the sake of public health, and this pressure warrants a delicate balance of appropriate therapeutic uses of these drugs with the risk of developing dependence. This article discusses pros and cons of PDMP in reducing diversion of prescription opioids, without hampering access to those medications for those with genuine needs, and highlights tensions around PDMP implementation. Discussion PDMPs may help alleviate diversion, over-prescription and fraudulent prescribing/dispensing; prompt drug treatment referrals; avoid awkward drug urine test; and inform spatial changes in prescribing practices and help designing tailored interventions. Fear of legal retribution, privacy and data security, potential confusion about addiction and pseudo-addiction, and potential undue pressure of detecting misuse/diversion - are the major problems. There are tensions about unintended consequence of excessive regulatory enforcements, corresponding collateral damages particularly about inadequate prescribing for patients with genuine needs, and mandatory consultation requirements of PDMP. Summary In this era of information technology PDMP is likely to flourish and remain with us for a long time. A clear standard of practice against which physicians’ care will be judged may expedite the utilisation of PDMP. In addition, adequate training on addiction and pain management along with public awareness, point-of-supply data entry from pharmacy, point-of-care real-time access to data, increasing access to addiction treatment and appropriate regulatory enforcement preferably through healthcare administration, together, may help remove barriers to PDMP use. PMID:25127880

  2. Li storage and impedance spectroscopy studies on Co3O4, CoO, and CoN for Li-ion batteries.

    PubMed

    Reddy, M V; Prithvi, Gundlapalli; Loh, Kian Ping; Chowdari, B V R

    2014-01-01

    The compounds, CoN, CoO, and Co3O4 were prepared in the form of nano-rod/particles and we investigated the Li-cycling properties, and their use as an anode material. The urea combustion method, nitridation, and carbothermal reduction methods were adopted to prepare Co3O4, CoN, and CoO, respectively. X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), and the Brunauer-Emmett-Teller (BET) surface and density methods were used to characterise the materials. Cyclic voltammetry (CV) was performed and galvanostatic cycling tests were also conducted up to 60-70 cycles. The observed reversible capacity of all compounds is of the increasing order CoO, Co3O4, CoN and all compounds showed negligible capacity fading. CoO allows for Li2O and Co metal to form during the discharge cycle, allowing for a high theoretical capacity of 715 mA h g(-1). Co3O4 allows for 4 Li2O and 3Co to form, and has a theoretical capacity of 890 mAhg(-1). CoN is the best anode material of the three because the nitrogen allows for Li3N and Co to form, resulting in an even higher theoretical capacity of 1100 mAhg(-1) due to the Li3N and Co metal formation. Irrespective of morphology the charge profiles of all three compounds showed a major plateaux ~2.0 V vs. Li and potential values are almost unchanged irrespective of crystal structure. Electrochemical impedance spectroscopy (EIS) was performed to understand variation resistance and capacitance values. PMID:24325322

  3. Trabajo Practico 3 Matematica Aplicada (1) Considerar una barra cilindrica de longitud L alineada con el eje x, ocupando el intervalo [0, L], suponer

    E-print Network

    Morin, Pedro

    un volumen V de aceite, con calor espec´ifico cf y densidad de masa f , en el que se sumerge un) Llamemos T(t) a la temperatura del aceite. Hallar una f´ormula para la energ´ia t´ermica total del aceite. (b) Hallar una f´ormula para la raz´on de cambio de la energ´ia t´ermica total del aceite (derivar la

  4. Arnoldo Hax nace en Santiago de Chile en 1936. Estudia la carrera de Ingeniero Industrial en la Universidad Catlica de Chile, donde se grada, con

    E-print Network

    Cardeñosa, Jesús

    Arnoldo Hax nace en Santiago de Chile en 1936. Estudia la carrera de Ingeniero Industrial en la Universidad Católica de Chile, donde se gradúa, con el número uno de su promoción y la más alta distinción, en Universidad de Michigan, vuelve a Chile para hacerse cargo de la Dirección de la Escuela de Ingeniería de la

  5. A methodological approach to comparing pros and cons of delocalizing villages: socio-economic and technical issues

    NASA Astrophysics Data System (ADS)

    Guadagno, Eleonora; Iovine, Giulio G. R.; Petrucci, Olga; Forciniti, Pinuccia R.

    2014-05-01

    On 7th March 2005, prolonged rainfalls combined with snowfalls activated a wide complex rock slide-earth flow that partly destroyed the village of Cavallerizzo at Cerzeto (Calabria, Southern Italy). Superposed tectonic units made of Palaeozoic metamorphic rocks, overlain by Miocene-Quaternary clastic terrains, crop out in the study area. The main scarp of the landslide developed by a recent normal fault, striking N-S along the western margin of the Crati graben and extended ca. 25 km. In its lower part, the phenomenon evolved in two main earth-flow bodies that extended along minor drainages and then merged along the S. Nicola torrent. The sector affected by the instability actually belongs to a large-scale slope movement: the 2005 activation was in fact only a paroxysmal episode of a long history of slope deformations, noticed in the area since the XVIII century. Warning signs had been recorded for weeks before the collapse, and the threatened area had been put under monitoring by CNR-IRPI. When the movement accelerated, people had already been alerted and evacuated (329 out of 581 inhabitants of Cerzeto were sheltered in nearby villages), thus neither victims nor injured were recorded. As a whole, 124 buildings were severely damaged or destroyed, the main road was interrupted. Immediately after the 7th March 2005 event, the national Department for Civil Protection decided to evaluate the feasibility of delocalizing Cavallerizzo to another site. At this purpose, CNR-IRPI was asked to analysing the "geological suitability" of 3 different sites (Pianette, Amatine, and Colombra), pre-selected by the same Municipality of Cerzeto in accordance to the Civil Protection; the results of the study were completed in early Summer 2005. Between October 2007 and December 2011, a new settlement was realized by the Italian Government, and the houses were delivered to people once living at Cavallerizzo. In the last years, the socio-economic effects of the delocalization of Cavallerizzo have been analysed within the frame of a PhD thesis by one of the authors. The present study focuses on the Cavallerizzo case study to discuss a methodological approach useful to comparing pros and cons of delocalizing villages, aiming at properly considering socio-economic effects in addition to technical issues.

  6. Emerging and Legacy Contaminants in The Foodweb in The Lower Columbia River: USGS ConHab Project

    NASA Astrophysics Data System (ADS)

    Nilsen, E. B.; Alvarez, D.; Counihan, T.; Elias, E.; Gelfenbaum, G. R.; Hardiman, J.; Jenkins, J.; Mesa, M.; Morace, J.; Patino, R.; Torres, L.; Waite, I.; Zaugg, S.

    2012-12-01

    An interdisciplinary study, USGS Columbia River Contaminants and Habitat Characterization (ConHab) project, investigates transport pathways, chemical fate, and effects of polybrominated diphenyl ethers (PBDEs) and other endocrine disrupting chemicals (EDCs) in aquatic media and the foodweb in the lower Columbia River, Oregon and Washington. Polar organic chemical integrative samplers (POCIS) and semipermeable membrane devices (SPMDs) were co-deployed at each of 10 sites in 2008 to provide a measure of the dissolved concentrations of select PBDEs, chlorinated pesticides, and other EDCs. PBDE-47 was the most prevalent of the PBDEs detected. Numerous organochlorine pesticides, both banned and current-use, including hexachlorobenzene, pentachloroanisole, dichlorodiphenyltrichloroethane (DDT) and its degradates, chlorpyrifos, endosulfan, and the endosulfan degradation products, were measured at each site. EDCs commonly detected included a series of polycyclic aromatic hydrocarbons (PAHs), fragrances (galaxolide), pesticides (chlorpyrifos and atrazine), plasticizers (phthalates), and flame retardants (phosphates). The downstream sites tended to have the highest concentrations of contaminants in the lower Columbia River. In 2009 and 2010 passive samplers were deployed and resident largescale suckers (Catostomus macrocheilus) and surface bed sediments were collected at three of the original sites representing a gradient of exposure based on 2008 results. Brain, fillet, liver, stomach, and gonad tissues were analyzed. Chemical concentrations were highest in livers, followed by brain, stomach, gonad, and, lastly, fillet. Concentrations of halogenated compounds in tissue samples ranged from <1 to 400 ng g-1 wet tissue. PBDEs, organochlorine pesticides, DDT and its degradates, and polychlorinated biphenyls (PCBs) were detected at all sites in nearly all organs tested. PBDE congeners most frequently detected and at the highest concentrations were PBDE-47 > PBDE-100 > PBDE-154 > PBDE-153. Concentrations in tissues and in sediments increased moving downstream from Skamania, WA to Columbia City, OR to Longview, WA. Preliminary biomarker results indicate that fish at the downstream sites experience greater stress relative to the upstream site based on gonad, kidney, spleen, and liver histopathology. These results support the hypothesis that contaminant concentrations in the environment correlate to bioaccumulation in the foodweb.

  7. Flight Deck Surface Trajectory-based Operations (STBO): Results of Piloted Simulations and Implications for Concepts of Operation (ConOps)

    NASA Technical Reports Server (NTRS)

    Foyle, David C.; Hooey, Becky L.; Bakowski, Deborah L.

    2013-01-01

    The results offour piloted medium-fidelity simulations investigating flight deck surface trajectory-based operations (STBO) will be reviewed. In these flight deck STBO simulations, commercial transport pilots were given taxi clearances with time and/or speed components and required to taxi to the departing runway or an intermediate traffic intersection. Under a variety of concept of operations (ConOps) and flight deck information conditions, pilots' ability to taxi in compliance with the required time of arrival (RTA) at the designated airport location was measured. ConOps and flight deck information conditions explored included: Availability of taxi clearance speed and elapsed time information; Intermediate RTAs at intermediate time constraint points (e.g., intersection traffic flow points); STBO taxi clearances via ATC voice speed commands or datal ink; and, Availability of flight deck display algorithms to reduce STBO RTA error. Flight Deck Implications. Pilot RTA conformance for STBO clearances, in the form of ATC taxi clearances with associated speed requirements, was found to be relatively poor, unless the pilot is required to follow a precise speed and acceleration/deceleration profile. However, following such a precise speed profile results in inordinate head-down tracking of current ground speed, leading to potentially unsafe operations. Mitigating these results, and providing good taxi RTA performance without the associated safety issues, is a flight deck avionics or electronic flight bag (EFB) solution. Such a solution enables pilots to meet the taxi route RTA without moment-by-moment tracking of ground speed. An avionics or EFB "error-nulling" algorithm allows the pilot to view the STBO information when the pilot determines it is necessary and when workload alloys, thus enabling the pilot to spread his/her attention appropriately and strategically on aircraft separation airport navigation, and the many other flight deck tasks concurrently required. Surface Traffic Management (STM) System Implications. The data indicate a number of implications regarding specific parameters for ATC/STM algorithm development. Pilots have a tendency to arrive at RTA points early with slow required speeds, on time for moderate speeds, and late with faster required speeds. This implies that ATC/STM algorithms should operate with middle-range speeds, similar to that of non-STBO taxi performance. Route length has a related effect: Long taxi routes increase the earliness with slow speeds and the lateness with faster speeds. This is likely due to the" open-loop" nature of the task in which the speed error compounds over a longer time with longer routes. Results showed that this may be mitigated by imposing a small number oftime constraint points each with their own RTAs effectively tuming a long route into a series of shorter routes - and thus improving RTA performance. STBO ConOps Implications. Most important is the impact that these data have for NextGen STM system ConOps development. The results of these experiments imply that it is not reasonable to expect pilots to taxi under a "Full STBO" ConOps in which pilots are expected to be at a predictable (x,y) airport location for every time (t). An STBO ConOps with a small number of intermediate time constraint points and the departing runway, however, is feasible, but only with flight deck equipage enabling the use of a display similar to the "error-nulling algorithm/display" tested.

  8. Aceptabilidad del diagnóstico rápido casero para HIV entre hombres gay y otros hombres que tienen sexo con hombres (G&HSH) de la Ciudad de Buenos Aires

    PubMed Central

    Balán, Iván C.; Carballo-Diéguez, Alex; Marone, Rubén O.; Pando, María A.; Barreda, Victoria; Ávila, María M.

    2011-01-01

    Resumen El uso del diagnóstico rápido para HIV en Argentina, así como otros países de Latinoamérica, ha sido limitado hasta el momento. Este trabajo reporta los resultados provenientes de un estudio cualitativo realizado entre hombres gays y otros hombres que tienen sexo con hombres (G&HSH) de la Ciudad de Buenos Aires, Argentina. El objetivo principal del mismo fue conocer las ventajas y desventajas que los hombres G&HSH perciben en relación al diagnóstico rápido casero para HIV. Se realizaron ocho grupos focales con 73 participantes en los cuales se discutió acerca de las ventajas y desventajas del uso de los diagnósticos rápidos. Las respuestas fueron codificadas utilizando un programa para análisis de datos cualitativos (NVivo) y analizadas temáticamente. Los participantes describieron numerosas ventajas sobre el uso del diagnóstico rápido casero, aunque algunos reportaron importantes preocupaciones dentro de las cuales se destaca la posibilidad de impulsos suicidas si alguien recibe un resultado positivo estando solo. En términos generales se observó una gran aceptabilidad para el uso del diagnóstico rápido si el mismo es realizado por personal de salud en lugares acondicionados para este fin. PMID:25284951

  9. FACTORES SOCIO-ESTRUCTURALES Y EL ESTIGMA HACIA EL VIH/SIDA: EXPERIENCIAS DE PUERTORRIQUEÑOS/AS CON VIH/SIDA AL ACCEDER SERVICIOS DE SALUD

    PubMed Central

    RIVERA-DIAZ, MARINILDA; VARAS-DIAZ, NELSON; REYES-ESTRADA, MARCOS; SURO, BEATRIZ; CORIANO, DORALIS

    2013-01-01

    RESUMEN El estigma relacionado al VIH/SIDA continúa afectando la prestación de servicios de salud y el bienestar físico y mental de las personas con VIH/SIDA (PVS). Recientemente la literatura científica ha señalado la importancia de comprender las manifestaciones de estigma más allá de las interacciones individuales. Por tal razón, investigaciones recientes en y fuera de Puerto Rico enfatizan la importancia de entender cómo factores socio-estructurales (FSE) influyen en los procesos de estigmatización social. Con el propósito de examinar los FSE que influyen en las manifestaciones de estigma relacionado al VIH/SIDA, realizamos y analizamos nueve grupos focales compuestos por hombres y mujeres en tratamiento para el VIH/SIDA que habían tenido experiencias estigmatizantes. Los participantes identificaron FSE relacionados a las manifestaciones de estigma, tales como el uso de viviendas especializadas, descentralización de los servicios de salud y el desarrollo de protocolos administrativos excluyentes en los servicios de salud. Los resultados demuestran la importancia de considerar los FSE en el desarrollo e implementación de intervenciones dirigidas a la población. PMID:24639599

  10. The International Consortium on Lithium Genetics (ConLiGen): An Initiative by the NIMH and IGSLI to Study the Genetic Basis of Response to Lithium Treatment

    PubMed Central

    Schulze, Thomas G.; Alda, Martin; Adli, Mazda; Akula, Nirmala; Ardau, Raffaella; Bui, Elise T.; Chillotti, Caterina; Cichon, Sven; Czerski, Piotr; Del Zompo, Maria; Detera-Wadleigh, Sevilla D.; Grof, Paul; Gruber, Oliver; Hashimoto, Ryota; Hauser, Joanna; Hoban, Rebecca; Iwata, Nakao; Kassem, Layla; Kato, Tadafumi; Kittel-Schneider, Sarah; Kliwicki, Sebastian; Kelsoe, John R.; Kusumi, Ichiro; Laje, Gonzalo; Leckband, Susan G.; Manchia, Mirko; MacQueen, Glenda; Masui, Takuya; Ozaki, Norio; Perlis, Roy H.; Pfennig, Andrea; Piccardi, Paola; Richardson, Sara; Rouleau, Guy; Reif, Andreas; Rybakowski, Janusz K.; Sasse, Johanna; Schumacher, Johannes; Severino, Giovanni; Smoller, Jordan W.; Squassina, Alessio; Turecki, Gustavo; Young, L. Trevor; Yoshikawa, Takeo; Bauer, Michael; McMahon, Francis J.

    2010-01-01

    For more than half a decade, lithium has been successfully used to treat bipolar disorder. Worldwide, it is considered the first-line mood stabilizer. Apart from its proven antimanic and prophylactic effects, considerable evidence also suggests an antisuicidal effect in affective disorders. Lithium is also effectively used to augment antidepressant drugs in the treatment of refractory major depressive episodes and prevent relapses in recurrent unipolar depression. In contrast to many psychiatric drugs, lithium has outlasted various pharmacotherapeutic ‘fashions’, and remains an indispensable element in contemporary psychopharmacology. Nevertheless, data from pharmacogenetic studies of lithium are comparatively sparse, and these studies are generally characterized by small sample sizes and varying definitions of response. Here, we present an international effort to elucidate the genetic underpinnings of lithium response in bipolar disorder. Following an initiative by the International Group for the Study of Lithium-Treated Patients (www.IGSLI.org) and the Unit on the Genetic Basis of Mood and Anxiety Disorders at the National Institute of Mental Health, lithium researchers from around the world have formed the Consortium on Lithium Genetics (www.ConLiGen.org) to establish the largest sample to date for genome-wide studies of lithium response in bipolar disorder, currently comprising more than 1,200 patients characterized for response to lithium treatment. A stringent phenotype definition of response is one of the hallmarks of this collaboration. ConLiGen invites all lithium researchers to join its efforts. PMID:20453537

  11. Aceptabilidad del diagnóstico rápido casero para HIV entre hombres gay y otros hombres que tienen sexo con hombres (G&HSH) de la Ciudad de Buenos Aires.

    PubMed

    Balán, Iván C; Carballo-Diéguez, Alex; Marone, Rubén O; Pando, María A; Barreda, Victoria; Avila, María M

    2011-03-01

    El uso del diagnóstico rápido para HIV en Argentina, así como otros países de Latinoamérica, ha sido limitado hasta el momento. Este trabajo reporta los resultados provenientes de un estudio cualitativo realizado entre hombres gays y otros hombres que tienen sexo con hombres (G&HSH) de la Ciudad de Buenos Aires, Argentina. El objetivo principal del mismo fue conocer las ventajas y desventajas que los hombres G&HSH perciben en relación al diagnóstico rápido casero para HIV. Se realizaron ocho grupos focales con 73 participantes en los cuales se discutió acerca de las ventajas y desventajas del uso de los diagnósticos rápidos. Las respuestas fueron codificadas utilizando un programa para análisis de datos cualitativos (NVivo) y analizadas temáticamente. Los participantes describieron numerosas ventajas sobre el uso del diagnóstico rápido casero, aunque algunos reportaron importantes preocupaciones dentro de las cuales se destaca la posibilidad de impulsos suicidas si alguien recibe un resultado positivo estando solo. En términos generales se observó una gran aceptabilidad para el uso del diagnóstico rápido si el mismo es realizado por personal de salud en lugares acondicionados para este fin. PMID:25284951

  12. Potential pros and cons of external healthcare performance evaluation systems: real-life perspectives on Iranian hospital evaluation and accreditation program

    PubMed Central

    Jaafaripooyan, Ebrahim

    2014-01-01

    Background: Performance evaluation is essential to quality improvement in healthcare. The current study has identified the potential pros and cons of external healthcare evaluation programs, utilizing them subsequently to look into the merits of a similar case in a developing country. Methods: A mixed method study employing both qualitative and quantitative data collection and analysis techniques was adopted to achieve the study end. Subject Matter Experts (SMEs) and professionals were approached for two-stage process of data collection. Results: Potential advantages included greater attractiveness of high accreditation rank healthcare organizations to their customers/purchasers and boosted morale of their personnel. Downsides, as such, comprised the programs’ over-reliance on value judgment of surveyors, routinization and incurring undue cost on the organizations. In addition, the improved, standardized care processes as well as the judgmental nature of program survey were associated, as pros and cons, to the program investigated by the professionals. Conclusion: Besides rendering a tentative assessment of Iranian hospital evaluation program, the study provides those running external performance evaluations with a lens to scrutinize the virtues of their own evaluation systems through identifying the potential advantages and drawbacks of such programs. Moreover, the approach followed could be utilized for performance assessment of similar evaluation programs. PMID:25279381

  13. Estudio de la fotoabsorción y fotoionización de la molécula de alta relevancia atmosférica no a través de los estados Rydberg con la metodología MQDO

    NASA Astrophysics Data System (ADS)

    Bustos, E.; Velasco, A. M.; Martín, I.; Lavín, C.

    Los procesos de fotoionización son de una importancia fundamental [1] y encuentran aplicación en un gran número de contextos científicos: Astrofísica [2], química de las radiaciones, biología. Los investigadores de dichos campos, necesitan de valores de fiables de secciones eficaces para la fotoionización parcial, la Fotoabsorción, así como para los procesos de fotofragmentación en amplios intervalos espectrales, particularmente en estudios de modelización [3-5]. En este trabajo se ha centrado la atención sobre el oxido nítrico, que se ha considerado apropiado y relevante por varios motivos: por el trascendental papel que representa en la física y química de la alta atmosfera [6], aparte de por estar íntimamente relacionado con los problemas de contaminación. Los procesos de recombinación disociativa [7] del NO, donde los estados Rydberg se encuentran directamente implicados, son relevantes, por ejemplo, en las regiones E y F de la ionosfera [7]. En este trabajo se estudia la fotoionización del NO desde el estado fundamental con la versión molecular del método del orbital de defecto cuántico (MQDO). Para ello se calcula el diferencial de las fuerzas de oscilador parciales que constituyen los canales de fotoionización del NO desde el estado fundamental. La continuidad del diferencial de fuerza de oscilador calculada a través del umbral de fotoionización, esto es, en las regiones del espectro discreta y del continua, se adopta como criterio de calidad la escasez de datos comparativos [8].

  14. Conversation with Lara about the Earth and Land. (Spanish Title: Conversando con Lara sobre la Tierra y la Teirra.) Conversando com Lara sobre a Terra e a Terra

    NASA Astrophysics Data System (ADS)

    da Conceição Barbosa-Lima, Maria

    2010-12-01

    The present article is the analysis of a conversation between the author and Lara, a four-yearold- girl, enrolled in nursery school, while she makes a drawing of the Earth. It took place outside school environment and without any other person around to avoid interference during the interview. According to Ferreira & Silva (2004), a researcher can only comprehend a child's drawing, or form, by listening to him/her while he/she is creating it. Lara presented the traditional flat drawing, picturing the sky parallel to the ground, as reported by Nardi & Carvalho (1996). However, when asked to draw the World - term used by Butterworth et al. (2002), in order to avoid unnecessary confusion - she represented it by a circle, with herself on the surface. Her drawings led to the conclusion that such girl does not know yet the World in which she lives is the Earth, and probably because of that, within her age and consequent maturity, she accurately differentiates the concepts of land and Earth. El presente artículo analiza una entrevista libre, mientras una niña de 4 años y 4 meses, matriculada en el pregrado, dibuja la Tierra. Esta entrevista se realizó fuera del ambiente escolar y sin otra persona alrededor que pudiera interferir. De acuerdo con Ferreira Silva (2004), para quien investiga es posible conocer realmente lo que un niño o una niña pone en el papel a través de grafismos y/o dibujos si se lo escucha durante el proceso de creación de la escritura con imágenes. La niña, en este caso, representa la Tierra con el tradicional dibujo plano y el "cielo" paralelo al suelo, conforme analizaron Nardi & Carvalho (1996). Pero, cuando se Le solicita dibujar el "Mundo" - palabra empleada en un trabajo de Butterworth et al. (2002), con intención de no provocar "confusiones" innecesarias a sus sujetos de investigación- lo representa de forma circular, poniéndose sobre su superficie. Sus dibujos llevan a concluir que esta niña aún no tiene conocimiento que el mundo en que vive es el planeta Tierra y que, probablemente por ese motivo, distingue con precisión, dentro de los limites de comprensión de la edad y madurez asociada, la tierra y la Tierra. O presente artigo analisa uma entrevista livre enquanto uma menina de quatro anos e quatro meses, matriculada na educação infantil, desenhava a Terra. A entrevista se realizou fora do ambiente escolar e sem qualquer outra pessoa por perto que pudesse interferir. De acordo com Ferreira & Silva (2004), para que o pesquisador conheça realmente o que uma criança põe no papel através de grafismos e/ou desenhos, é necessário ouvi-la durante o processo de criação do desenho. A menina apresenta, em relação à Terra, o tradicional desenho plano com o 'céu' paralelo ao solo, conforme já apresentaram Nardi & Carvalho (1996). Mas quando solicitada a desenhar o Mundo - palavra empregada em um trabalho por Butterworth et al. (2002), com intenção de não provocar 'confusões' desnecessárias para seus pesquisados - o representa de forma circular, colocando-se sobre sua superfície. Seus desenhos levaram à conclusão que esta criança ainda não tem conhecimento de que o Mundo em que vive é o Planeta Terra e que, provavelmente por este motivo, diferencia com precisão, dentro dos limites impostos por sua idade e consequente maturidade, a terra e a Terra.

  15. 23 Pond Lane, Suite 300, Middlebury, VT 05753-1189 (802) 388-4969 or 1-800-956-1125

    E-print Network

    Hayden, Nancy J.

    test pH (water) Soil test Al (ppm) Lime (lb/ac) to apply to increase soil 0.1 pH value at different on soil test report Optimum Range Target Soil pH Balsam Fir (5.0 - 6.0) Fraser Fir (5.3 - 5.8) 5.8 5 lb/ac P2O5, Min. 40 lb/ac P2O5) Lime to raise pH will also make more P available from soil Potassium

  16. Energy and Resource Saving of Steelmaking Process: Utilization of Innovative Multi-phase Flux During Dephosphorization Process

    NASA Astrophysics Data System (ADS)

    Matsuura, Hiroyuki; Hamano, Tasuku; Zhong, Ming; Gao, Xu; Yang, Xiao; Tsukihashi, Fumitaka

    2014-09-01

    An increase in the utilization efficiency of CaO, one of the major fluxing agents used in various steelmaking processes, is required to reduce the amount of discharged slag and energy consumption of the process. The authors have intensively focused on the development of innovative dephosphorization process by using so called "multi-phase flux" composed of solid and liquid phases. This article summarizes the research on the above topic done by the authors, in which the formation mechanisms of P2O5-containing phase during CaO or 2CaO·SiO2 dissolution into molten slag, the phase relationship between solid and liquid phases at equilibrium, and thermodynamic properties of P2O5-containing phase have been clarified. The reactions between solid CaO or 2CaO·SiO2 and molten CaO-FeO x -SiO2-P2O5 slag were observed by dipping solid specimen in the synthesized slag at 1573 K or 1673 K. The formation of the CaO-FeO layer and dual-phase layer of solid 2CaO·SiO2 and FeO x -rich liquid phase was observed around the interface from the solid CaO side toward the bulk slag phase side. Condensation of P2O5 into 2CaO·SiO2 phase as 2CaO·SiO2-3CaO·P2O5 solid solution was observed in both cases of CaO and 2CaO·SiO2 as solid specimens. Measurement of the phase relationship for the CaO-FeO x -SiO2-P2O5 system confirmed the condensation of P2O5 in solid phase at low oxygen partial pressure. The thermodynamics of 2CaO·SiO2-3CaO·P2O5 solid solution are to be clarified to quantitatively simulate the dephosphorization process, and the current results are also introduced. Based on the above results, the reduction of CaO consumption, the discharged slag curtailment, and energy-saving effects have been discussed.

  17. The soil-water balance simulations of a grassland in response to CO2, rainfall, and biodiversity manipulations at BioCON

    NASA Astrophysics Data System (ADS)

    Flinker, R. H.; Cardenas, M.; Caldwell, T. G.; Rich, R.; Reich, P.

    2013-12-01

    The BioCON (Biodiversity, CO2 and N) experiment has been continuously running since 1997. Operated by the University of Minnesota and located within the Cedar Creek Ecosystem Science Reserve in Minnesota, USA, BioCON is a Free-Air CO2 Enrichment (FACE) experiment that investigates plant community response to three key environmental variables: nitrogen, atmospheric CO2 and biodiversity. More recently rainfall exclusion and temperature manipulation were added to the experiment which amounts to 371 plots. The site attempts to replicate predicted average temperature increases and a northern shift of plant species and any associated consequences. FACE experiments have been conducted for a number of years in different countries, but the focus has generally been on how plant communities, soil respiration and microbes respond. Minimal work has been focused on the hydrologic aspects of these experiments which are potentially valuable for investigating global warming effects on local and plot-scale ecohydrology. Thus, the objective of this work is to characterize and model unsaturated flow for different CO2 and rainfall treatments in order to see how they affect soil moisture dynamics and groundwater recharge on grasslands of central Minnesota. Our study focuses on simulating soil moisture dynamics in eighteen of the BioCON plots: six bare plots with regular rainfall regimes (zero plant species, three plots with elevated atmospheric CO2 levels), six regular rainfall regimes (nine plant species, three plots with elevated atmospheric CO2 levels) and six reduced rainfall regimes (nine plant species, three plots with elevated atmospheric CO2 levels). The Simultaneous Heat and Water (SHAW) model, which solves the Richards equation for unsaturated zone water flow coupled to a comprehensive energy balance model, was parameterized with a combination of field and lab estimates of soil properties. Field estimates of saturated hydraulic conductivity using tension infiltrometers ranged from 9.8 x 10-4 to 6.7 x 10-3 cm/s. Soil cores were collected and analyzed for soil hydraulic properties (texture, unsaturated hydraulic conductivity and moisture retention). From the grain size analyzes of soil samples collected every 10 cm until 1m depth, the soil is homogenous and on average 87% sand, 11% silt and 2% clay. We will be presenting results from the simulations and statistical comparisons to observations of soil moisture at four depths in each plot.

  18. The Effect of Coadsorbed Water on the Stability, Con?guration and Interconversion of Formyl (HCO) and Hydroxymethylidyne (COH) on Platinum (1 1 1)

    SciTech Connect

    Arnadottir, Liney; Stuve, Eric M.; Jonsson, Hannes

    2012-05-23

    Two forms of the methanol electro-oxidation intermediate with stoichiometry C:H:O, COH (hydroxymethylidyne) and HCO (formyl), on Pt (11 1) with and without coadsorbed water were studied using density functional theory calculations. The structure, adsorption energy and stability with respect to dissociation were calculated. Both HC=O and C–OH were stable on clean Pt (11 1) and with a single coadsorbed water molecule, while only the HCO con?guration was stable in the presence of a whole water layer. The vibrational modes of HC=O on a bridge site showed no mode around 1700 cm-1 characteristic of C=O stretch making it hard to distinguish it from C–OH.

  19. Broadening, shifting, and line asymmetries in the 2<--0 band of CO and CO-N2: Experimental results and theoretical calculations

    NASA Astrophysics Data System (ADS)

    Predoi-Cross, Adriana; Bouanich, J. P.; Benner, D. Chris; May, A. D.; Drummond, J. R.

    2000-07-01

    We have measured the room temperature, widths, pressure shifts, and line asymmetry coefficients for many transitions of the first overtone band of CO and CO perturbed by N2. The broadening coefficients were obtained with an accuracy of about 1%. The pure CO profiles have been fitted by a Voigt profile while the CO-N2 spectral profiles have been fitted with a Lorentz and an empirical line shape model (HCv) that blends together a hard collision model and a speed-dependent Lorentz profile. In addition to the Voigt, Lorentz, and HCv models, we have added a dispersion profile to account for weak line mixing. The line broadening and shift coefficients are compared to semiclassical calculations employing a variety of intermolecular interactions. The line asymmetry results are compared to line mixing calculations based on the energy corrected sudden (ECS) model. The results indicate that effects other than line mixing also contribute to the measured line asymmetry.

  20. Experience in managing a large-scale rescreening of Papanicolaou smears and the pros and cons of measuring proficiency with visual and written examinations.

    PubMed

    Rube, I F

    1989-01-01

    Experiences in a large-scale interlaboratory rescreening of Papanicolaou smears are detailed, and the pros and cons of measuring proficiency in cytology are discussed. Despite the additional work of the rescreening project and some psychological and technical problems, it proved to be a useful measure of the laboratory's performance as a whole. One problem to be avoided in future similar studies is the creation of too many diagnostic categories. Individual testing and certification have been shown to be accurate predictors of proficiency. For cytology, such tests require a strong visual component to test interpretation and judgment skills, such as by the use of glass slides or photomicrographs. The potential of interactive videodisc technology for facilitating cytopathologic teaching and assessment is discussed. PMID:2546349

  1. Una cinta transportadora de longitud l se mueve con velocidad v respecto al suelo. Por su extremo derecho se introduce un bloque de masa m que se mover en contra de la cinta

    E-print Network

    Chang, Mark J. L.

    Problema 2 Una cinta transportadora de longitud l se mueve con velocidad v respecto al suelo. Por su extremo derecho se introduce un bloque de masa m que se moverá en contra de la cinta (ver figura cantidad de calor liberada en el proceso de frenado sobre la cinta. (En la situación planteada se cumple

  2. IEEE TransacTIons on UlTrasonIcs, FErroElEcTrIcs, and FrEqUEncy conTrol, vol. 59, no. 1, JanUary 2012156 08853010/$25.00 2012 IEEE

    E-print Network

    Pugh, Mary

    IEEE TransacTIons on UlTrasonIcs, FErroElEcTrIcs, and FrEqUEncy conTrol, vol. 59, no. 1, Jan-wave rotary ultrasonic motors, have composite piezoelec- tric structures. A composite piezoelectric structure

  3. 08853010/$25.00 2009 IEEE 213IEEE TransacTIons on UlTrasonIcs, FErroElEcTrIcs, and FrEqUEncy conTrol, vol. 56, no. 1, JanUary 2009

    E-print Network

    Cao, Wenwu

    0885­3010/$25.00 © 2009 IEEE 213IEEE TransacTIons on UlTrasonIcs, FErroElEcTrIcs, and FrEqUEncy con being transmitted into the medium. Therefore, match- ing layer is a critical component of an ultrasonic of ultrasonic transducers, in- cluding sensitivity and bandwidth. To improve the reso- lution of ultrasonic

  4. IEEE TransacTIons on UlTrasonIcs, FErroElEcTrIcs, and FrEqUEncy conTrol, vol. 58, no. 8, aUgUsT 2011 1669 08853010/$25.00 2011 IEEE

    E-print Network

    Cao, Wenwu

    IEEE TransacTIons on UlTrasonIcs, FErroElEcTrIcs, and FrEqUEncy conTrol, vol. 58, no. 8, aUgUsT 2011 1669 0885­3010/$25.00 © 2011 IEEE Frequency Dispersion of Longitudinal Ultrasonic Velocity, Wenwu cao, and Pengdi Han, Member, IEEE Abstract--The frequency dispersion of ultrasonic veloc- ity

  5. 08853010/$25.00 2009 IEEE 2679IEEE TransacTIons on UlTrasonIcs, FErroElEcTrIcs, and FrEqUEncy conTrol, vol. 56, no. 12, dEcEmbEr 2009

    E-print Network

    Cao, Wenwu

    , insulator, or conductor, magnetic or nonmagnetic, can be manipulated by acoustic levitation characteristics for clean room and precision actuators [3], [4]. although magnetic levitation is also a noncontactEqUEncy conTrol, vol. 56, no. 12, dEcEmbEr 2009 Abstract--Near-field acoustic levitation (NFAL) has been used

  6. Biochar Usage: Pros and Cons

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Soil fertility benefits of charcoal application have been reported as early as 1847 indicating that plant nutrients are sorbed within charcoal pores. The use of biomass-derived black carbon or biochar, the solid byproduct from the pyrolysis processing of any organic feedstock, has garnered recent a...

  7. Quantum Computing: Pro and Con

    E-print Network

    John Preskill

    1997-08-26

    I assess the potential of quantum computation. Broad and important applications must be found to justify construction of a quantum computer; I review some of the known quantum algorithms and consider the prospects for finding new ones. Quantum computers are notoriously susceptible to making errors; I discuss recently developed fault-tolerant procedures that enable a quantum computer with noisy gates to perform reliably. Quantum computing hardware is still in its infancy; I comment on the specifications that should be met by future hardware. Over the past few years, work on quantum computation has erected a new classification of computational complexity, has generated profound insights into the nature of decoherence, and has stimulated the formulation of new techniques in high-precision experimental physics. A broad interdisciplinary effort will be needed if quantum computers are to fulfill their destiny as the world's fastest computing devices. (This paper is an expanded version of remarks that were prepared for a panel discussion at the ITP Conference on Quantum Coherence and Decoherence, 17 December 1996.)

  8. INFORMATICA Preparazione delle presentazioni con

    E-print Network

    Sproston, Jeremy

    ­ SCHERMATA INIZIALE 7 IMPRESS (OPENOFFICE) 8 FINESTRA PRINCIPALE 9 Barra di accesso rapido: Accesso immediato ad alcuni comandi (personalizzabile) Barra del titolo: nome del documento e dell'applicazione Barra dei menu: Divide i comandi in tipologie. I comandi di ogni voce di menu sono visualizzati nella barra

  9. Crossing the Rubric-Con

    ERIC Educational Resources Information Center

    Bailey, James R.

    2014-01-01

    This essay engages the prospect and peril of employing rubrics in America. It discusses how institutional independence affects the enterprise, and addresses whether rubrics will be received as salvation or subservience by educational agents. It asks how rubrics can benefit stakeholders while examining their unintended consequences. It concludes by…

  10. 40 CFR 60.232 - Standard for fluorides.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 40 Protection of Environment 6 2011-07-01 2011-07-01 false Standard for fluorides. 60.232 Section... Industry: Triple Superphosphate Plants § 60.232 Standard for fluorides. On and after the date on which the... gases which contain total fluorides in excess of 100 g/megagram (Mg) of equivalent P2O5 feed (0.20...

  11. 40 CFR 60.212 - Standard for fluorides.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 40 Protection of Environment 6 2011-07-01 2011-07-01 false Standard for fluorides. 60.212 Section... Industry: Superphosphoric Acid Plants § 60.212 Standard for fluorides. (a) On and after the date on which... facility any gases which contain total fluorides in excess of 5.0 g/megagram (Mg) of equivalent P2O5...

  12. 40 CFR 60.212 - Standard for fluorides.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 40 Protection of Environment 6 2010-07-01 2010-07-01 false Standard for fluorides. 60.212 Section... Industry: Superphosphoric Acid Plants § 60.212 Standard for fluorides. (a) On and after the date on which... facility any gases which contain total fluorides in excess of 5.0 g/megagram (Mg) of equivalent P2O5...

  13. 40 CFR 60.232 - Standard for fluorides.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 40 Protection of Environment 6 2010-07-01 2010-07-01 false Standard for fluorides. 60.232 Section... Industry: Triple Superphosphate Plants § 60.232 Standard for fluorides. On and after the date on which the... gases which contain total fluorides in excess of 100 g/megagram (Mg) of equivalent P2O5 feed (0.20...

  14. Tillage System Effect on Vertical Phosphorus Stratification and Phosphorus Uptake of Winter Wheat, Winter Pea, and Spring Pea

    E-print Network

    Lawrence, Rick L.

    with hoe-type openers at 12 in. row spacing. Phosphorus fertilizer (0-45-0) was applied at 22.5 lb P2O5/ac al. 2006; Selles et al. 1999). Consequently, P availability, and hence, P fertilizer needs, may uptake, and hence P availability and fertilizer need, is different between tillage systems. Methods

  15. 21 CFR 74.2053 - D&C Black No. 3.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ...be avoided by current good manufacturing practices: (1) Calcium hydroxyapatite (CaO and P2 O5 ), not less than 75 percent...kilogram (kg) (3 parts per million (ppm)); (6) Lead, not more than 10 mg/kg (10 ppm); and (7) Total...

  16. 40 CFR 63.601 - Definitions.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...Pollutants From Phosphoric Acid Manufacturing Plants...Equivalent P 2 O5 feed means the quantity...remove moisture and organic matter from phosphate... Phosphate rock feed means all material...Purified phosphoric acid process line means...impurities from the product acid for the...

  17. 40 CFR 60.210 - Applicability and designation of affected facility.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... Performance for the Phosphate Fertilizer Industry: Superphosphoric Acid Plants § 60.210 Applicability and... each superphosphoric acid plant having a design capacity of more than 15 tons of equivalent P2O5 feed...: evaporators, hot wells, acid sumps, and cooling tanks. (b) Any facility under paragraph (a) of this...

  18. 40 CFR 60.210 - Applicability and designation of affected facility.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... Performance for the Phosphate Fertilizer Industry: Superphosphoric Acid Plants § 60.210 Applicability and... each superphosphoric acid plant having a design capacity of more than 15 tons of equivalent P2O5 feed...: evaporators, hot wells, acid sumps, and cooling tanks. (b) Any facility under paragraph (a) of this...

  19. 40 CFR 60.211 - Definitions.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...: Superphosphoric Acid Plants § 60.211 Definitions. As used in this subpart, all terms not defined herein shall have the meaning given them in the Act and in subpart A of this part. (a) Superphosphoric acid plant means any facility which concentrates wet-process phosphoric acid to 66 percent or greater P2O5 content...

  20. 40 CFR 60.211 - Definitions.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...: Superphosphoric Acid Plants § 60.211 Definitions. As used in this subpart, all terms not defined herein shall have the meaning given them in the Act and in subpart A of this part. (a) Superphosphoric acid plant means any facility which concentrates wet-process phosphoric acid to 66 percent or greater P2O5 content...

  1. 40 CFR 60.210 - Applicability and designation of affected facility.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... Performance for the Phosphate Fertilizer Industry: Superphosphoric Acid Plants § 60.210 Applicability and... each superphosphoric acid plant having a design capacity of more than 15 tons of equivalent P2O5 feed...: evaporators, hot wells, acid sumps, and cooling tanks. (b) Any facility under paragraph (a) of this...

  2. 40 CFR 60.211 - Definitions.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...: Superphosphoric Acid Plants § 60.211 Definitions. As used in this subpart, all terms not defined herein shall have the meaning given them in the Act and in subpart A of this part. (a) Superphosphoric acid plant means any facility which concentrates wet-process phosphoric acid to 66 percent or greater P2O5 content...

  3. 40 CFR 60.210 - Applicability and designation of affected facility.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... Performance for the Phosphate Fertilizer Industry: Superphosphoric Acid Plants § 60.210 Applicability and... each superphosphoric acid plant having a design capacity of more than 15 tons of equivalent P2O5 feed...: evaporators, hot wells, acid sumps, and cooling tanks. (b) Any facility under paragraph (a) of this...

  4. 40 CFR 60.210 - Applicability and designation of affected facility.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... Performance for the Phosphate Fertilizer Industry: Superphosphoric Acid Plants § 60.210 Applicability and... each superphosphoric acid plant having a design capacity of more than 15 tons of equivalent P2O5 feed...: evaporators, hot wells, acid sumps, and cooling tanks. (b) Any facility under paragraph (a) of this...

  5. 40 CFR 60.211 - Definitions.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...: Superphosphoric Acid Plants § 60.211 Definitions. As used in this subpart, all terms not defined herein shall have the meaning given them in the Act and in subpart A of this part. (a) Superphosphoric acid plant means any facility which concentrates wet-process phosphoric acid to 66 percent or greater P2O5 content...

  6. 40 CFR 60.211 - Definitions.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...: Superphosphoric Acid Plants § 60.211 Definitions. As used in this subpart, all terms not defined herein shall have the meaning given them in the Act and in subpart A of this part. (a) Superphosphoric acid plant means any facility which concentrates wet-process phosphoric acid to 66 percent or greater P2O5 content...

  7. Opt Quant Electron DOI 10.1007/s11082-012-9584-x

    E-print Network

    Ilan, Boaz

    of phosphosilicate fibers Guillermo Salceda-Delgado · Alejandro Martinez-Rios · Boaz Ilan · David Monzon The Raman response function and Raman nonlinear index of phosphosilicate fibers are calculated for several P2O5 concentrations. The nonlinear index of phosphosilicate fiber is estimated by using the Boling

  8. 40 CFR 60.244 - Test methods and procedures.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... (tons). K=conversion factor, 1000 mg/g (7,000 gr/lb). (2) Method 13A or 13B shall be used to determine...) Method 9 (incorporated by reference—see § 60.17) shall be used to determine the P2O5 content (Rp) of...

  9. 40 CFR 60.234 - Test methods and procedures.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...determine the mass flow rate (Mp ) of the phosphorus-bearing feed. (ii) The Association of Official Analytical Chemists (AOAC) Method 9 (incorporated by reference—see § 60.17) shall be used to determine the P2 O5 content (Rp ) of the...

  10. 40 CFR 60.244 - Test methods and procedures.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...shall be used to determine the amount of product (Mp ) in storage. (ii) The Association of Official Analytical Chemists (AOAC) Method 9 (incorporated by reference—see § 60.17) shall be used to determine the P2 O5 content (Rp ) of the...

  11. 21 CFR 74.2053 - D&C Black No. 3.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... ADDITIVES SUBJECT TO CERTIFICATION Cosmetics § 74.2053 D&C Black No. 3. (a) Identity. The color additive D&C... may be avoided by current good manufacturing practices: (1) Calcium hydroxyapatite (CaO and P2O5), not... cosmetics in amounts consistent with current good manufacturing practice: Eyeliner, eye shadow, mascara,...

  12. 21 CFR 74.2053 - D&C Black No. 3.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... ADDITIVES SUBJECT TO CERTIFICATION Cosmetics § 74.2053 D&C Black No. 3. (a) Identity. The color additive D&C... may be avoided by current good manufacturing practices: (1) Calcium hydroxyapatite (CaO and P2O5), not... cosmetics in amounts consistent with current good manufacturing practice: Eyeliner, eye shadow, mascara,...

  13. 21 CFR 74.2053 - D&C Black No. 3.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... ADDITIVES SUBJECT TO CERTIFICATION Cosmetics § 74.2053 D&C Black No. 3. (a) Identity. The color additive D&C... may be avoided by current good manufacturing practices: (1) Calcium hydroxyapatite (CaO and P2O5), not... cosmetics in amounts consistent with current good manufacturing practice: Eyeliner, eye shadow, mascara,...

  14. De conformidad con la Ley de Derechos Humanos de 1977 del Distrito de Columbia, segn enmendada, Cdigo Oficial del Distrito de Columbia, Seccin 2-1401.01 et seq., (Ley), el Distrito de Columbia no discrimina, de forma visible ni percibida, por

    E-print Network

    De conformidad con la Ley de Derechos Humanos de 1977 del Distrito de Columbia, según enmendada la ausencia, el empleado no perderá ninguno de sus beneficios de empleo, ni tampoco los derechos por las estipuladas por la Ley. LAS QUEJAS CON RESPECTO A ALGUNA DENEGACIÓN DE LOS DERECHOS EN VIRTUD DE

  15. Coagulase-negative staphylococci (CoNS) isolated from ready-to-eat food of animal origin--phenotypic and genotypic antibiotic resistance.

    PubMed

    Chaj?cka-Wierzchowska, Wioleta; Zadernowska, Anna; Nalepa, Beata; Sierpi?ska, Magda; ?aniewska-Trokenheim, ?ucja

    2015-04-01

    The aim of this work was to study the pheno- and genotypical antimicrobial resistance profile of coagulase negative staphylococci (CoNS) isolated from 146 ready-to-eat food of animal origin (cheeses, cured meats, sausages, smoked fishes). 58 strains were isolated, they were classified as Staphylococcus xylosus (n = 29), Staphylococcus epidermidis (n = 16); Staphylococcus lentus (n = 7); Staphylococcus saprophyticus (n = 4); Staphylococcus hyicus (n = 1) and Staphylococcus simulans (n = 1) by phenotypic and genotypic methods. Isolates were tested for resistance to erythromycin, clindamycin, gentamicin, cefoxitin, norfloxacin, ciprofloxacin, tetracycline, tigecycline, rifampicin, nitrofurantoin, linezolid, trimetoprim, sulphamethoxazole/trimethoprim, chloramphenicol, quinupristin/dalfopristin by the disk diffusion method. PCR was used for the detection of antibiotic resistance genes encoding: methicillin resistance--mecA; macrolide resistance--erm(A), erm(B), erm(C), mrs(A/B); efflux proteins tet(K) and tet(L) and ribosomal protection proteins tet(M). For all the tet(M)-positive isolates the presence of conjugative transposons of the Tn916-Tn1545 family was determined. Most of the isolates were resistant to cefoxitin (41.3%) followed by clindamycin (36.2%), tigecycline (24.1%), rifampicin (17.2%) and erythromycin (13.8%). 32.2% staphylococcal isolates were multidrug resistant (MDR). All methicillin resistant staphylococci harboured mecA gene. Isolates, phenotypic resistant to tetracycline, harboured at least one tetracycline resistance determinant on which tet(M) was most frequent. All of the isolates positive for tet(M) genes were positive for the Tn916-Tn1545 -like integrase family gene. In the erythromycin-resistant isolates, the macrolide resistance genes erm(C) or msr(A/B) were present. Although coagulase-negative staphylococci are not classical food poisoning bacteria, its presence in food could be of public health significance due to the possible spread of antibiotic resistance. PMID:25475289

  16. Dietary inflammatory index and anthropometric measures of obesity in a population sample at high cardiovascular risk from the PREDIMED (PREvención con DIeta MEDiterránea) trial.

    PubMed

    Ruiz-Canela, M; Zazpe, I; Shivappa, N; Hébert, J R; Sánchez-Tainta, A; Corella, D; Salas-Salvadó, J; Fitó, M; Lamuela-Raventós, R M; Rekondo, J; Fernández-Crehuet, J; Fiol, M; Santos-Lozano, J M; Serra-Majem, L; Pinto, X; Martínez, J A; Ros, E; Estruch, R; Martínez-González, M A

    2015-03-28

    The dietary inflammatory index (DII) is a new tool to assess the inflammatory potential of the diet. In the present study, we aimed to determine the association between the DII and BMI, waist circumference and waist:height ratio (WHtR). We conducted a cross-sectional study of 7236 participants recruited into the PREvención con DIeta MEDiterránea trial. Information from a validated 137-item FFQ was used to calculate energy, food and nutrient intakes. A fourteen-item dietary screener was used to assess adherence to the Mediterranean diet (MeDiet). Sex-specific multivariable linear regression models were fitted to estimate differences (and 95 % CI) in BMI, waist circumference and WHtR across the quintiles of the DII. All nutrient intakes, healthy foods and adherence to the MeDiet were higher in the quintile with the lowest DII score (more anti-inflammatory values) except for intakes of animal protein, saturated fat and monounsaturated fat. Although an inverse association between the DII and total energy was apparent, the DII was associated with higher average BMI, waist circumference and WHtR after adjusting for known risk factors. The adjusted difference in the WHtR for women and men between the highest and lowest quintiles of the DII was 1·60 % (95 % CI 0·87, 2·33) and 1·04 % (95 % CI 0·35, 1·74), respectively. Pro-inflammatory scores remained associated with obesity after controlling for the effect that adherence to a MeDiet had on inflammation. In conclusion, the present study shows a direct association between the DII and indices of obesity, and supports the hypothesis that diet may have a role in the development of obesity through inflammatory modulation mechanisms. PMID:25720588

  17. Canadian Shield brine from the Con Mine, Yellowknife, NT, Canada: Noble gas evidence for an evaporated Palaeozoic seawater origin mixed with glacial meltwater and Holocene recharge

    NASA Astrophysics Data System (ADS)

    Greene, Shane; Battye, Nick; Clark, Ian; Kotzer, Tom; Bottomley, Dennis

    2008-08-01

    Dissolved noble gas concentrations were measured in high salinity (270 g/L) Ca(Na)-Cl groundwaters from the Con Mine, Yellowknife, Canada in an effort to discriminate between two possible origins, as either a brine generated by evaporative enrichment in a Paleozoic inland sea, or marine water concentrated by freezing during glacial times. Major ion and isotope geochemistry indicate that brines from the deepest level remain relatively undisturbed by mixing with modern water introduced by mining. Mixing calculations are used to quantify fractions of brine, glacial meltwater and modern water. From this, noble gas concentrations were corrected for excess air with Ne and normalized to 100% brine solution. Over-pressuring of helium and argon in the brine provide age constraints based on the accumulation of geogenic 4He and 40Ar. Radiogenic age calculations together with the local geological history suggest brine emplacement during early Palaeozoic time, likely during the Devonian when evaporitic inland seas existed in this region. The concentrations of the atmospherically derived noble gases in the brine fraction (Kr = 1.4E-8, Xe = 8.5E-10 cc/ccO) are close to atmospheric equilibrium for brine at 25 °C (Kr = 7.3E-9, Xe = 8.0E-10 cc/ccO), but are far lower than would be expected for closed-system concentration of seawater by freezing (Kr = 2.8E-6, Xe = 4.2E-7 cc/ccO). Thus, despite the complicated mixing history of the brine, the atmospheric and geogenic noble gases provide strong evidence for an origin as air-equilibrated brine from evaporated Paleozoic seawater, which infiltrated via density displacement through existing fractures and faults into the Canadian Shield.

  18. Study on the Strategies for the Soil and Water Resource Con-servation of Slopeland in Taiwan in Response to the Extreme Climate

    NASA Astrophysics Data System (ADS)

    Huang, Wen-Cheng

    2014-05-01

    Global climate change results in extreme weather, especially ex-treme precipitation in Taiwan. Though the total amount of precipi-tation remains unchanged, the frequency of rainfall return period increases which affects slopeland and causes sediment disaster. In Taiwan, slopeland occupies about 73% of national territory. Under harsh environmental stress, soil and water conservation of slope-land becomes more important. In response to the trends of global-ization impacts of climate change, long term strategic planning be-comes more necessary. This study reviewed international practices and decision making process about soil and water conservation of slopeland; and conducted the compilation and analysis of water and soil conservation related research projects in Taiwan within the past five years. It is necessary for Taiwan to design timely adaptive strategies about conducting the all-inclusive conservation of na-tional territory, management and business operation of watershed based on the existing regulation with the effects of extreme weather induced by climate change and the changes of social-economic en-vironments. In order to realize the policy vision of "Under the premise of multiple uses, operating the sustainable business and management of the water and soil resources in the watershed through territorial planning in response to the climate and so-cial-economic environment change". This study concluded the future tasks for soil and water con-servation: 1.Design and timely amend strategies for soil and wand water conservation in response to extreme weather. 2. Strengthen the planning and operating of the land management and integrated conservation of the water and soil resources of key watershed. 3. Manage and operate the prevention of debris flow disaster and large-scale landslide. 4. Formulate polices, related regulations and assessment indicators of soil and water conservation. 5. Maintain the biodiversity of the slopeland and reduce the ecological footprint. 6. Conduct soil and water conservation research according to the importance and urgency of policies. 7. Implement the international cooperation, technology communication, talent cultivation, and integrated education and promotion.

  19. Reversible CO binding enables tunable CO/H? and CO/N? separations in metal-organic frameworks with exposed divalent metal cations.

    PubMed

    Bloch, Eric D; Hudson, Matthew R; Mason, Jarad A; Chavan, Sachin; Crocellà, Valentina; Howe, Joshua D; Lee, Kyuho; Dzubak, Allison L; Queen, Wendy L; Zadrozny, Joseph M; Geier, Stephen J; Lin, Li-Chiang; Gagliardi, Laura; Smit, Berend; Neaton, Jeffrey B; Bordiga, Silvia; Brown, Craig M; Long, Jeffrey R

    2014-07-30

    Six metal-organic frameworks of the M2(dobdc) (M = Mg, Mn, Fe, Co, Ni, Zn; dobdc(4-) = 2,5-dioxido-1,4-benzenedicarboxylate) structure type are demonstrated to bind carbon monoxide reversibly and at high capacity. Infrared spectra indicate that, upon coordination of CO to the divalent metal cations lining the pores within these frameworks, the C-O stretching frequency is blue-shifted, consistent with nonclassical metal-CO interactions. Structure determinations reveal M-CO distances ranging from 2.09(2) Å for M = Ni to 2.49(1) Å for M = Zn and M-C-O angles ranging from 161.2(7)° for M = Mg to 176.9(6)° for M = Fe. Electronic structure calculations employing density functional theory (DFT) resulted in good agreement with the trends apparent in the infrared spectra and crystal structures. These results represent the first crystallographically characterized magnesium and zinc carbonyl compounds and the first high-spin manganese(II), iron(II), cobalt(II), and nickel(II) carbonyl species. Adsorption isotherms indicate reversible adsorption, with capacities for the Fe, Co, and Ni frameworks approaching one CO per metal cation site at 1 bar, corresponding to loadings as high as 6.0 mmol/g and 157 cm(3)/cm(3). The six frameworks display (negative) isosteric heats of CO adsorption ranging from 52.7 to 27.2 kJ/mol along the series Ni > Co > Fe > Mg > Mn > Zn, following the Irving-Williams stability order. The reversible CO binding suggests that these frameworks may be of utility for the separation of CO from various industrial gas mixtures, including CO/H2 and CO/N2. Selectivities determined from gas adsorption isotherm data using ideal adsorbed solution theory (IAST) over a range of gas compositions at 1 bar and 298 K indicate that all six M2(dobdc) frameworks could potentially be used as solid adsorbents to replace current cryogenic distillation technologies, with the choice of M dictating adsorbent regeneration energy and the level of purity of the resulting gases. PMID:24999916

  20. Comparison between dynamic cystocolpoproctography and dynamic pelvic floor MRI: pros and cons: which is the "functional" examination for anorectal and pelvic floor dysfunction?

    PubMed

    Maglinte, Dean D T; Hale, Douglass S; Sandrasegaran, Kumar

    2013-10-01

    "Functional" imaging of anorectal and pelvic floor dysfunction has assumed an important role in the diagnosis and management of these disorders. Although defecography has been widely practiced for decades to evaluate the dynamics of rectal emptying, debate concerning its clinical relevance, how it should be done and interpreted continues. Due to the recognition of the association of defecatory disorders with pelvic organ prolapse in women, the need to evaluate the pelvic floor as a unit has arisen. To meet this need, defecography has been extended to include not only evaluation of defecation disorders but also the rest of the pelvic floor by opacifying the small bowel, vagina, and the urinary bladder. The term "dynamic cystocolpoproctography" (DCP) has been appropriately applied to this examination. Rectal emptying performed with DCP provides the maximum stress to the pelvic floor resulting in complete levator ani relaxation. In addition to diagnosing defecatory disorders, this method of examination demonstrates maximum pelvic organ descent and provides organ-specific quantification of organ prolapse, information that is only inferred by means of physical examination. It has been found to be of clinical value in patients with defecation disorders and the diagnosis of associated prolapse in other compartments that are frequently unrecognized by history taking and the limitations of physical examination. Pelvic floor anatomy is complex and DCP does not show the anatomical details pelvic magnetic resonance imaging (MRI) provides. Technical advances allowing acquisition of dynamic rapid MRI sequences has been applied to pelvic floor imaging. Early reports have shown that pelvic MRI may be a useful tool in pre-operative planning of these disorders and may lead to a change in surgical therapy. Predictions of hypothetical increase cancer incidence and deaths in patients exposed to radiation, the emergence of pelvic floor MRI in addition to questions relating to the clinical significance of DCP findings have added to these controversies. This review analyses the pros and cons between DCP and dynamic pelvic floor MRI, addresses imaging and interpretive controversies, and their relevance to clinical management. PMID:22446896

  1. Do not disturb the animals! or, how Con Edison saved $300,000 using a trenchless technology to renew 3,000 feet of leaking gas main at the Bronx Zoo

    SciTech Connect

    Bufe, M.

    1995-07-01

    Every leaking gas main presents a challenge. But when that leaking main follows a series of sweeping bends on its route through North America`s largest urban wildlife park, it presents a special challenge. That was the situation Consolidated Edison Company of New York Inc. recently faced when numerous leaks were discovered along 3,000 feet of a 95-year-old, 12-inch cast-iron main that winds through New York City`s Bronx Zoo. Con Edison knew it needed a long-term solution to this increasingly common problem. Thanks to the cooperative efforts of the utility`s operations and research departments and the Gas Research Institute (GRI), Con Edison also knew about a trenchless technology that could renew the pipe with minimal impact to the environment--while saving the utility a substantial sum of money in the process. In the Paltem system, a woven polyester hose is injected with an epoxy resin and then inverted (turned inside out) into a pipe at an access pit. The liner then bonds to the inside wall of the pipe, forming a smooth, flexible and pressure-resistant lining. The process is environmentally safe, requires very little excavation and can be installed in days, rather than the weeks or months it can take to dig up and replace existing pipe.

  2. Cristallisation dans les verres de silicates contenant du molybdène et du phosphore

    NASA Astrophysics Data System (ADS)

    Cousi, C.; Bart, F.; Phalippou, J.

    2004-11-01

    L'ajout de certains oxydes dans un verre initialement homogène peut entraîner des cristallisations plus ou moins importantes du mélange lors de son refroidissement. Parmi les oxydes connus pour induire de tels phénomènes dans des verres de silicates, se trouvent l'oxyde de molybdène MoO{3} et l'oxyde de phosphore P{2}O{5}. Les matériaux étudiés ici sont des verres silico-sodo-calciques auxquels ont été ajoutés MoO{3} et P{2}O{5} en quantité variable, ce qui provoque des cristallisations importantes. L'identification et la quantification des phases cristallines en présence par MEB et méthode Rietveld à partir des diffractogrammes permettent de comprendre les rôles respectifs du molybdène et du phosphore dans les phénomènes de cristallisation intervenant dans ces verres. Mots-clés: verres d'oxydes, cristallisation, diffraction des rayons X

  3. Silver doped nanobioactive glass particles for bone implant applications

    NASA Astrophysics Data System (ADS)

    Prabhu, M.; Kavitha, K.; Karunakaran, G.; Manivasakan, P.; Rajendran, V.

    2013-02-01

    Silica based silver doped nanobioactive glass compositions (58SiO2-33CaO-9P2O5 and 58SiO2-23CaO-9P2O5-10Ag2O(mol%)) were synthesized by a simple sol-gel route. The prepared samples were comprehensively characterised by X-ray diffraction, Fourier transform infrared spectroscopy, transmission electron microscopy and scanning electron microscopic studies. The results reveal that the prepared samples have amorphous phase with spherical morphology and having a particle size less than 100 nm. The specific surface areas were 90 and 61 m2g-1 respectively. The in vitro bioactivity of glass samples were confirmed by the formation of hydroxyapatite layer on glass surfaces. The Ag2O-doped nanobioactive glasse samples shows reveal significant antibacterial activity compare with base glasses.

  4. Conversations with Marcgrave: the Origin of Modern Astronomy in the Southern Hemisphere (Spanish Title: Conversando con Marcgrave: El Origen de la Astronomía Moderna en el Hemisferio Sur) Conversando Com Marcgrave: a Origem da Moderna Astronomia no Hemisfério Sul

    NASA Astrophysics Data System (ADS)

    Medeiros, Alexandre; Araújo, Fábio

    2005-12-01

    The year 2004 signals the 400th anniversary of the birth of count Mauricio of Nassau, an important character in the history of Brazil. The present text is related to the period of Dutch domination in Pernambuco. The article attempts to rescue the beginnings of Astronomy study in the South hemisphere. Therefore, we idealized a dramatization of a fictitious interview with German astronomer Georg Marcgrave, who was the constructor of the first astronomical observatory in this hemisphere and the author of the first systematic astronomical observations using telescopes in this side of the world. Our "conversation" with Marcgrave is idealized in the old Recife scenario, a place where he lived in Mauricio of Nassau's period and gathers some fellow teachers who love the teaching of Astronomy. The story, this way, is reported in a possibly light and funny atmosphere. Nevertheless, the conceptual and historical framework presented is based on reliable bibliographical sources pointed out at the end of the text. The sources range from the original book of that scientist, in which a solar eclipse is reported, passing through some other classical texts, such as that of Professor Juliano Moreira, up to more recent sources such as the very influential work of professor John North. Other influential texts about the Dutch period in Brazil, such as the classical works of Charles Boxer, Bouman and Boogaart, among others, are also used in the construction of this pedagogical dramatization, which involves an interesting chapter of the history of Astronomy. El año 2004 marca los 400 años del nacimineto del conde Mauricio de Nassau, un importante personaje de la historia del Brasil. El presente texto está relacionado con el período del dominio holandés en Pernambuco. El artículo intenta rescatar los comienzos del estudio de la Astronomía en el hemisferio Sur. Para esto, ideamos una dramatización de una entrevista ficticia con el astrónomo alemán Georg Marcgrave, constructor del primer observatorio astronómico del hemisferio y autor de las primeras observaciones astronómicas sistemáticas utilizando telescopios de este lado del mundo. Nuestra "conversación" con Marcgrave es imaginada en el marco del Recife antiguo, lugar donde él vivió durante el período de Mauricio de Nassau, y reune algunos colegas profesores apasionados por la enseñanza de la Astronomía. La historia es contada, de esta forma, dentro de un clima ameno y hasta un poco divertido, si bien las informaciones históricas y conceptuales contenidas en ella están basadas en fuentes bibliográficas confiables, debidamente referenciadas al final del texto. Estas fuentes van desde la obra original de este científico, en la cual aparece su relato sobre la observación de un eclipse solar en Recife, pasando por obras clásicas respecto de él mismo, como la del profesor Juliano Moreira, hasta fuentes mucho más recientes como el influyente trabajo del profesor John North. Otros textos importantes referidos al período de la colonización holandesa en el Brasil, tales como las obras clásicas de Charles Boxer, Bouman y Boogaart entre otros, son también utilizados en la construcción de esta dramatización pedagógica que se refiere a un interesante capítulo de la Historia de la Astronomía. O ano de 2004 assinala os 400 anos do nascimento do conde Maurício de Nassau, um importante personagem da história do Brasil. O presente texto está relacionado com o período do domínio holandês em Pernambuco. O artigo tenta resgatar o começo do estudo da Astronomia no hemisfério Sul. Para tal, idealizamos uma dramatização de uma entrevista fictícia com o astrônomo alemão Georg Marcgrave, construtor do primeiro observatório astronômico deste hemisfério e autor das primeiras observações astronômicas sistemáticas com o uso de telescópios neste lado do mundo. Nossa "conversa" com Marcgrave é idealizada no cenário do Recife antigo, local em que ele viveu no período de Maurício de Nassau e reúne alguns colegas professores apaixonados

  5. El rol de Ia colaboracion y el Modelo de Aprendizaje Basado en Proyectos (ABPr) mediante el lente de la Teoria de Actividad (CHAT): un estudio de caso con estudiantes de 9no grado

    NASA Astrophysics Data System (ADS)

    Delgado, Isabel C.

    Los modelos de eensenanza y aprendizaje constructivistas conceptualizan el aprendizaje como un proceso activo. El modelo de Aprendizaje Basado en Proyectos (ABPr) se distingue por una serie de componentes, entre los cuales se destaca el aspecto colaborativo y cooperativo como un reto al momento de su implantacion. Son pocas las investigaciones que se concentran en este aspecto del modelo. En este estudio, se analizaron las diversas interacciones que surgen durante la implantacion de una unidad curricular sobre el tema de Geologia de Puerto Rico, la cual se diseno con el modelo ABPr cuyo enfoque es orientacion a proyectos. Particularmente, se examinaron las interacciones sociales que surgen entre los pares y entre pares y docente durante el proceso de planificacion y desarrollo de los productos finales, al igual que las interacciones entre los estudiantes y el material didactico en estas etapas del modelo. La investigacion es de tipo cualitativo e incorpora como diseno el estudio de caso. Las diversas interacciones constituyen la unidad de analisis. En el estudio participaron 19 estudiantes de 9no grado, a quienes se organizaron en 5 grupos colaborativos por temas de interes (Pangea, Placas tectonicas, Volcanes, Tsunamis y Terremotos). Las tecnicas que se utilizaron para recopilar los datos fueron: observaciones participativas, grupos focales y analisis de documentos (cuadernos reflexivos y respuestas de los estudiantes a la pregunta central del proyecto). Para el analisis de los datos se aplico la teoria de actividad (CHAT) que concentra la unidad de analisis en la actividad humana en un contexto particular. Los resultados del estudio senalan que las interacciones entre pares, entre pares y docente, asi como entre estudiantes y material didactico son fundamentales en el proceso de aprendizaje. Una mayor interaccion entre pares durante las etapas de planificar y desarrollar los productos finales de la unidad, promueve una mejor comprension de los conceptos de la unidad, segun evidencia los productos finales del ABPr. La interaccion con el docente es muy importante para mediar los conflictos y desacuerdos que surgen como parte de las interacciones entre pares. Por lo tanto, el uso de diversas estrategias de andamiaje por parte del docente durante las reuniones de los grupos colaborativos es esencial para el exito del modelo ABPr.

  6. Revision curricular a partir de un analisis comparativo de las discrepancias en los curriculos de una escuela de optometria en Puerto Rico con las competencias requeridas para las agencias de revalida y acreditacion 2004

    NASA Astrophysics Data System (ADS)

    Rivera Pacheco, Andres

    El proposito de esta investigacion, un estudio cualitativo de caso, fue comparar y contrastar el curriculo vigente de la Escuela de Optometria de la UIAPR con las competencias y estandares requeridos por las agencias de acreditacion y de revalida. Con este proposito, decidimos realizar una revision y un analisis de documentos: el prontuario de cada uno de los cursos de los curriculos implantados en el 1993 y en el 2001; las competencias y estandares establecidos por las agencias de revalida y de acreditacion; y las estadisticas en las que se analiza el porcentaje de estudiantes que aprueban cada una de las partes de los examenes de revalida entre el 1998 al 2003. Se realizaron entrevistas dirigidas para dar apoyo y complementar la revision y el analisis de estos documentos. Los participantes de las entrevistas fueron tres estudiantes de la clase de optometria del 2004 (ultima clase del curriculo del 1993); tres estudiantes de la clase de optometria del 2005 (primera clase graduanda del curriculo vigente) y tres profesores y/o directores de los Departamentos de Ciencias Basicas, Ciencias Clinicas y Cuidado al Paciente. Esta investigacion se enmarco en el modelo de evaluacion curricular de discrepancia de Malcolm Provus y en el modelo de desarrollo basado en competencias. Uno de los hallazgos mas importantes del estudio es que los cambios que se implantaron al curriculo del 2001 no han logrado que los estudiantes mejoren su ejecucion en los examenes de revalida. Por otro lado, se encontro que el curriculo vigente atiende completamente los estandares de la practica de Optometria, pero no las competencias. Esta informacion fue validada mediante el uso de una tabla de cotejo para el analisis de los cursos y de la informacion obtenida de las entrevistas. El estudio determina y concluye que existen discrepancias entre los prontuarios de los cursos del curriculo y las competencias requeridas por la agencia de revalida. Segundo, que el Departamento de Ciencias Basicas es el que presenta mas deficiencias en el desarrollo de las competencias. El investigador recomienda disenar e implantar un curriculo basado en competencias y proveer formacion en didactica y procesos de aprendizaje a los profesores.

  7. Late Proterozoic diabase dikes of the New Jersey Highlands; a remnant of Iapetan rifting in the north-central Appalachians

    USGS Publications Warehouse

    Volkert, R.A.; Puffer, J.H.

    1995-01-01

    Diabase dikes of widespread occurrence intrude only middle Proterozoic rocks in the New Jersey Highlands. These dikes are enriched in TiO2, P2O5, Zr, and light rare earth elements, and have compositions that range from tholeiitic to alkalic. Dike descriptions, field relations, petrography, geochemistry, petrogenesis, and tectonic setting are discussed. The data are consistent with emplacement in a rift-related, within-plate environment and suggest a correlation with other occurrences of late Proterozoic Appalachian basaltic magmatism.

  8. Testing of Brushite (CaHPO42H2O) in Synthetic Biomineralization Solutions and In Situ Crystallization of Brushite Micro-Granules

    E-print Network

    Tas, A. Cuneyt

    Testing of Brushite (CaHPO4·2H2O) in Synthetic Biomineralization Solutions and In Situ to this study. I. Introduction BRUSHITE (DCPD, dicalcium phosphate dihydrate, CaHPO4·2H2O), named after the American mineralogist George Jarvis Brush (1831­1912), is the predominant phase of the CaO­P2O5­H2O system

  9. 40 CFR 60.202 - Standard for fluorides.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 40 Protection of Environment 6 2010-07-01 2010-07-01 false Standard for fluorides. 60.202 Section... Industry: Wet-Process Phosphoric Acid Plants § 60.202 Standard for fluorides. (a) On and after the date on... facility any gases which contain total fluorides in excess of 10.0 g/Mg of equivalent P2O5 feed (0.020...

  10. 40 CFR 60.202 - Standard for fluorides.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 40 Protection of Environment 6 2011-07-01 2011-07-01 false Standard for fluorides. 60.202 Section... Industry: Wet-Process Phosphoric Acid Plants § 60.202 Standard for fluorides. (a) On and after the date on... facility any gases which contain total fluorides in excess of 10.0 g/Mg of equivalent P2O5 feed (0.020...

  11. Synthesis of (+)-Ipalbidine Based on 6-exo-trig Radical Cyclization of a ?-Amino Radical.

    PubMed

    Chea, JongMyoung; Clive, Derrick L J

    2015-10-16

    N-Boc (S)-proline was converted into (2S)-2-[(phenylselanyl)methyl]pyrrolidine, which was alkylated on nitrogen with 2-bromo-1-(4-methoxyphenyl)ethan-1-one. Reaction with vinyllithium, 6-exo-trig radical cyclization (Bu3SnH, AIBN, PhMe, 110 °C), dehydration (P2O5, H3PO4), and demethylation (BBr3) gave (+)-ipalbidine with ee >99%. PMID:26402510

  12. ONA REPORTS published in

    E-print Network

    Ma, Lena

    , wheat, oat and triticale (wheat and rye cross), are cool season annuals. In south central Florida, Morey wheat and Sunland triticale were seeded at 100 lb/A and fertilized with 100-50-100 lb/A N-P2O5-K2O and Florida 401 rye (2.9 T/A) and Sunland triticale (3.9 T/A) were harvested at the anthesis stage. Crude

  13. Luna 24 origins - Some trace element constraints

    NASA Technical Reports Server (NTRS)

    Jovanovic, S.; Jensen, K. J.; Reed, G. W., Jr.

    1978-01-01

    Luna 24 basaltic material originated in the particular volume of the lunar crust that produced Apollo 11 and Luna 16 basaltic material; it has the same Clr/P2O5 (r = residual) signature. Ru-Os contents (Barsukov et al., 1977) and a number of radiogenic age measurements place Luna 24 basalt origins stratigraphically in a layer between those from which Apollo 15 and Apollo 11 and 17 basalts were derived.

  14. Ecology and thermal inactivation of microbes in and on interplanetary space vehicle components

    NASA Technical Reports Server (NTRS)

    Campbell, J. E.

    1973-01-01

    The thermal inactivation curve for Bacillus subtilis var. niger spores on the Viking lander is examined. Tests were conducted at 113 C and 25% RH, and over a wide range of temperatures using .001% RH and additions of P2O5 to dry the environment. Results show the 25% RH environment did not significantly reduce the survival curve, while the survival curves for spores treated under the drier .001% RH environment was reduced by a factor of 3.

  15. Ionic conductivity and glass transition of phosphoric acids

    SciTech Connect

    Wang, Yangyang; Lane, Nathan A; Sun, Che-Nan; Fan, Fei; Zawodzinski, Thomas; Sokolov, Alexei P

    2013-01-01

    Here we report the low-temperature dielectric and viscoelastic properties of phosphoric acids in the range of H2O:P2O5 1.5 5. Both dielectric and viscosity measurements allow us to determine the glass-transition temperatures of phosphoric acids. The obtained glass-transition temperatures are in good agreement with previous differential scanning calorimetric measurements. Moreover, our analysis reveals moderate decoupling of ionic conductivity from structural relaxation in the vicinity of the glass transition.

  16. Ionic Ckonductivity and Glass Transition of Phosphoric Acids

    SciTech Connect

    Wang, Yangyang; Lane, Nathan A; Sun, Che-Nan; Fan, Fei; Zawodzinski, Thomas; Sokolov, Alexei P

    2013-01-01

    Here we report the low-temperature dielectric and viscoelastic properties of phosphoric acids in the range of H2O:P2O5 1.5 5. Both dielectric and viscosity measurements allow us to determine the glass-transition temperatures of phosphoric acids. The obtained glass-transition temperatures are in good agreement with previous differential scanning calorimetric measurements. Moreover, our analysis reveals moderate decoupling of ionic conductivity from structural relaxation in the vicinity of the glass transition.

  17. Lunar Sample Compendium C Meyer 2012

    E-print Network

    Rathbun, Julie A.

    Lunar Sample Compendium C Meyer 2012 63559 ­ 6 grams 63565 ­ 1 gram 63567 ­ 3.2 grams 63568 ­ 4 is in mm. S80-37428. Figure 4: Photo of 63576. Scale is in mm. S80-37442. #12;Lunar Sample Compendium C) P2O5 (a) S % sum (a) broad beam e probe #12;Lunar Sample Compendium C Meyer 2012 Figure 6

  18. Multi-analytical approach applied to the provenance study of marbles used as covering slabs in the archaeological submerged site of Baia (Naples, Italy): The case of the "Villa con ingresso a protiro"

    NASA Astrophysics Data System (ADS)

    Ricca, Michela; Belfiore, Cristina Maria; Ruffolo, Silvestro Antonio; Barca, Donatella; De Buergo, Monica Alvarez; Crisci, Gino Mirocle; La Russa, Mauro Francesco

    2015-12-01

    This paper is focused on archaeometric investigations of white marbles taken from the submerged archaeological site of Baia (Naples). The marine area includes the ruins of this ancient Roman city, whose structures range from luxurious maritime villas and imperial buildings with private thermae and tabernae, to more simple and modest houses. Analyses were carried out on fifty marble fragments of covering slabs, belonging to several pavements of the monumental villa, called the Villa con ingresso a protiro, in order to ascertain their provenance. The most distinctive properties of marbles are their variety of textural property especially regarding grain size (MGS), associated with the Mn content and the variation of stable isotopes. These features, supported by the contribution of other variables and studies, establish the basis for the correct identification of the marbles. For this purpose, minero-petrographic and geochemical techniques were used. Results were compared with literature data of white marbles commonly used in antiquity, especially in the Mediterranean basin and showed that a variety of precious marbles from Carrara, Docimium (Afyon), Thasos-D, Aphrodisias, Proconnesos (Marmara), Paros and Pentelicon were used in the ancient roman city of Baia, confirming the importance of the submerged archaeological site and also allowing researchers to broaden the existing database.

  19. Brewers' spent grain (BSG) protein hydrolysates decrease hydrogen peroxide (H2O2)-induced oxidative stress and concanavalin-A (con-A) stimulated IFN-? production in cell culture.

    PubMed

    McCarthy, Aoife L; O'Callaghan, Yvonne C; Connolly, Alan; Piggott, Charles O; FitzGerald, Richard J; O'Brien, Nora M

    2013-11-01

    The present study investigated the bioactivity of protein hydrolysates and fractionated hydrolysates prepared from brewers' spent grain (BSG) using proteases, including Alcalase 2.4L, Flavourzyme and Corolase PP. Hydrolysates were designated K-Y, including fractionated hydrolysates with molecular weight (m.w.) < 3, <5 and >5 kDa. Where computable, IC50 values were lower in U937 (1.38-9.78%) than Jurkat T cells (1.15-13.82%). Hydrolysates L, Q and R and fractionated hydrolysates of U and W (<3, <5, >5 kDa) significantly (P < 0.01) protected against hydrogen peroxide (H2O2)-induced reduction of superoxide dismutase (SOD) activity. A fractionated hydrolysate of W (<5 kDa) protected against H2O2-induced DNA damage, P < 0.01. Hydrolysates K, N, P, U, U > 5 kDa, V, V > 5 kDa, W, W > 5 kDa significantly (P < 0.05) reduced a concanavlin-A (con-A) stimulated production of interferon-? (IFN-?). In conclusion, BSG protein hydrolysates demonstrate bioactivity in vitro; lower m.w. hydrolysates (<3, <5 kDa) show greatest antioxidant activity and unfractionated or higher m.w. hydrolysates (>5 kDa) possess anti-inflammatory effects. PMID:24113874

  20. The effect of phosphate content on the bioactivity of soda-lime-phosphosilicate glasses.

    PubMed

    O'Donnell, M D; Watts, S J; Hill, R G; Law, R V

    2009-08-01

    We report on the bioactivity of two series of glasses in the SiO(2)-Na(2)O-CaO-P(2)O(5) system after immersion in simulated body fluid (SBF) after 21 days. The effect of P(2)O(5) content was examined for compositions containing 0-9.25 mol.% phosphate. Both series of glasses degraded to basic pH, but the solutions tended towards to neutrality with increasing phosphate content; a result of the acidic phosphate buffering the effect of the alkali metal and alkaline earth ions on degradation. Bioactivity was assessed by the appearance of features in the X-ray diffraction (XRD) traces and Fourier transform infrared (FTIR) spectra consistent with crystalline hydroxyl-carbonate-apatite (HCAp): such as the appearance of the (002) Bragg reflection in XRD and splitting of the P-O stretching vibration around 550 cm(-1) in the FTIR respectively. All glasses formed HCAp in SBF over the time periods studied and the time for formation of this crystalline phase occurred more rapidly in both series as the phosphate contents were increased. For P(2)O(5) content >3 mol.% both series exhibited highly crystalline apatite by 16 h immersion in SBF. This indicates that in the compositions studied, phosphate content is more important for bioactivity than network connectivity (NC) of the silicate phase and compositions showing rapid apatite formation are presented, superior to 45S5 Bioglass which was tested under identical conditions for comparison. PMID:19330429

  1. Phosphatic Permian rocks of the Adobe Range, Nevada, and their environment of deposition

    USGS Publications Warehouse

    Ketner, Keith Brindley

    1979-01-01

    Permian sedimentary rocks in the Adobe range, northern Nevada, are phosphatic, and although the particles of phosphate are relatively more disseminated, they closely resemble the rocks of the Phosphoria Formation. In the northern Adobe Range, where the entire Permian sequence is approximately correlative with the Phosphoria Formation, it is 200 m thick and averages 1.7 percent P2O5 . In the southern Adobe Range, the Permian sequence is more than 1,700 m thick, and the upper half which is roughly correlative with the Phosphoria Formation averages more than 2 percent P2O5. Some thin beds in rocks of Permian age contain more than 20 percent P2O5. Phosphatic rocks of the Adobe Range were deposited in shallow water among islands in the western part of the epicontinental Phosphoria sea. The continental margin and the open ocean lay far to the west. At the same time, the Phosphoria Formation was being deposited in the eastern and central parts of the Phosphoria sea. Theories based on the work of Kasakov done in 1937 relating phosphate deposition directly to sites of upwelling oceanic waters are questioned. Nondeposition of diluent materials such as detritus and carbonate is probably of more importance in producing phosphate in economic concentrations than is geographic position with respect to upwelling waters.

  2. on the Crystallization Behaviors of Ti-Bearing Blast Furnace Slags Using Single Hot Thermocouple Technique

    NASA Astrophysics Data System (ADS)

    Sun, Yongqi; Li, Jing; Wang, Xidong; Zhang, Zuotai

    2014-08-01

    The present paper investigates how the P2O5 addition influences the crystallization behaviors of Ti-bearing blast furnace (Ti-BF) slags with different basicity using Single Hot Thermocouple Technique. It was found that the basicity showed a significant effect on the crystallization behaviors of the Ti-BF slags, and the trend of formation of the rod-shape crystal decreased while the trend of formation of dendrite crystal increased with increasing basicity. The addition of P2O5 was found to promote the formation of rod-shape crystal. The basicity and crystallization temperature that the rod-shape crystal could be formed increased, while the incubation time of formation of the rod-shape crystal decreased with increasing P2O5 content. Scanning electron microscope equipped with energy-dispersive X-ray spectroscope and X-ray diffraction were employed to observe the morphology and determine the crystalline phase of the Ti-enriched crystals. The results indicated that the rod-shape crystal was rutile. The kinetics of the formation of rutile was studied, and the mechanism of crystallization and growth was further discussed. The results indicated that the crystallization of rutile was one-dimensional interface-controlled growth, and the nucleation rate varied with the holding time.

  3. Structural characterization of some sol-gel derived phosphosilicate glasses

    NASA Astrophysics Data System (ADS)

    Todan, L.; Anghel, E. M.; Osiceanu, P.; Turcu, R. V. F.; Atkinson, I.; Simon, S.; Zaharescu, M.

    2015-04-01

    A comparative study of three phosphosilicate gels of the 90SiO2-10P2O5 composition obtained from tetraethoxysilane and three phosphorous precursors: triethylphosphate (TEP), triethylphosphite (TEPI) and H3PO4 is performed. 29Si and 31P Magic Angle Spining NMR, X-ray Photoelectron, X-ray Fluorescence and Raman spectroscopies as well as TG analysis are used in order to establish phosphorous precursors and annealing influence on composition and structure of the outcome materials. Unlike the three dimensional silicate network made of Si(OSi)x(OH)4-x species, unreacted TEP (100% Q1 condensed phosphorous units) from TEP derived gel and a large amount of isolated phosphorous species (39.7% Q0) in the H3PO4 derived gel are identified. Annealing at 700 °C of the three gels give similar structure with the 90SiO2-10P2O5 glass, excepting the triethylphosphate derived glass that has a much lower P content. Thus, the H3PO4 derived glass at 700 and 1000 °C shows 1.89 and 1.94 times higher P2O5/SiO2 ratios than in the case of the TEP derived one.

  4. Hydrocolloids in wound management: pros and cons.

    PubMed

    Finnie, Alison

    2002-07-01

    Hydrocolloids are interactive dressings which are well established in wound management. Because of their sophisticated composition, they can be used to manage a variety of wound types, from clean and granulating to sloughy and necrotic. While they may be more expensive per item than many other modern dressings, if used correctly they can be cost-effective, as they have a longer wear time. Hydrocolloid formulations appear to be changing and improving with ongoing research by manufacturers, but a significant limitation appears to be sensitivity reactions. Dressings that would benefit from improvement are those containing gelatin, and those containing colophony within the adhesive matrix. These known sensitizers are largely unpublicised, but can produce serious side effects in some individuals. PMID:12131848

  5. erators with general and specific information con-

    E-print Network

    Hill, Jeffrey E.

    , candies, jams, jellies, and fruit pies. "Cottage food opera- tions" as they are called require no license or fillings Milk and dairy products including hard, soft and cottage cheeses and yogurt Cut fresh fruits and

  6. Synthetic chemicals have been components of con-

    E-print Network

    Cai, Long

    experi- mental animals are used1 and that products worth 5.6 trillion are regulated by such testing with the current approach to toxicology testing? An ideal study to under- stand whether an agent is harmful. The crucial question therefore is how useful are the cur- rent models, which are mostly animal models, and how

  7. Bovine Spongiform Encephalopathy: Atypical Pros and Cons

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Transmissible spongiform encephalopathies (TSEs) are fatal neurologic diseases that affect several mammalian species including human beings. Four animal TSE agents have been reported: scrapie of sheep and goats; chronic wasting disease (CWD) of deer, elk, and moose; transmissible mink encephalopath...

  8. DIVERSAS MANERAS DE GENERAR ENERGIA CON

    E-print Network

    Gilbes, Fernando

    CAPACIDAD HIDROELECTRICA Country Annual Hydroelectric Energy Production (TW/year) Installed Capacity (GW Dam project in Hubei, China, is the world's largest hydroelectric generating system. Three Gorges Dam;Conversión de Energía Oceano-Termal Ocean Thermal Energy Conversion (OTEC) Depende de la diferencia en

  9. Pros and cons of immunological methods

    Technology Transfer Automated Retrieval System (TEKTRAN)

    The International regulatory agencies Codex Alimentarius, European Commission Regulation and the U.S. Food and Drug Administration have set 20 mg/kg (ppm) as the maximum limit of gluten allowed in foods labeled as “gluten-free”. Immunological approaches appear to be, so far, the most suitable method...

  10. Payment for donor kidneys: pros and cons.

    PubMed

    Friedman, E A; Friedman, A L

    2006-03-01

    Continuous growth of the end stage renal disease population treated by dialysis, outpaces deceased donor kidneys available, lengthens the waiting time for a deceased donor transplant. As estimated by the United States Department of Health & Human Services: '17 people die each day waiting for transplants that can't take place because of the shortage of donated organs.' Strategies to expand the donor pool--public relations campaigns and Drivers' license designation--have been mainly unsuccessful. Although illegal in most nations, and viewed as unethical by professional medical organizations, the voluntary sale of purchased donor kidneys now accounts for thousands of black market transplants. The case for legalizing kidney purchase hinges on the key premise that individuals are entitled to control of their body parts even to the point of inducing risk of life. One approach to expanding the pool of kidney donors is to legalize payment of a fair market price of about 40,000 dollars to donors. Establishing a federal agency to manage marketing and purchase of donor kidneys in collaboration with the United Network for Organ Sharing might be financially self-sustaining as reduction in costs of dialysis balances the expense of payment to donors. PMID:16482095

  11. I-ConFIRM Steering Committee

    Cancer.gov

    Skip to Main Content at the National Institutes of Health | www.cancer.gov Epidemiology and Genomics Research In NCI's Division of Cancer Control and Population Sciences Search EGRP: Main Menu EGRP Home About the Program Mission & Vision Organizational

  12. The pros and cons of code validation

    NASA Technical Reports Server (NTRS)

    Bobbitt, Percy J.

    1988-01-01

    Computational and wind tunnel error sources are examined and quantified using specific calculations of experimental data, and a substantial comparison of theoretical and experimental results, or a code validation, is discussed. Wind tunnel error sources considered include wall interference, sting effects, Reynolds number effects, flow quality and transition, and instrumentation such as strain gage balances, electronically scanned pressure systems, hot film gages, hot wire anemometers, and laser velocimeters. Computational error sources include math model equation sets, the solution algorithm, artificial viscosity/dissipation, boundary conditions, the uniqueness of solutions, grid resolution, turbulence modeling, and Reynolds number effects. It is concluded that, although improvements in theory are being made more quickly than in experiments, wind tunnel research has the advantage of the more realistic transition process of a right turbulence model in a free-transition test.

  13. [Pros and cons of legalizing marijuana].

    PubMed

    Mönckeberg B, Fernando

    2014-04-01

    There are already several countries that have accepted marijuana as a soft drug, separating it from more dangerous ones. Yarious therapeutic properties have even been attributed to its use. Others, however, think that its use should be prohibited due to the mental interference and behavioral changes produced either by its occasional use as well as the permanent mental damage linked to chronic marijuana use. In order to clarify this divergence of opinions, the scientific literature is reviewed. It is concluded that there is a serious risk, especially for teenagers, associated to chronic marijuana use due to the presence of more frequent psychotic and schizophrenic episodes, which can be permanent, while consumption during pregnancy results in brain damage to the fetus, similar to fetal alcohol syndrome. Scientific research also indicated that smoking marijuana produces an even more severe bronchial damage than tobacco, with risk of lung cancer. In conclusion, the notion that marijuana is a risk-free soft drug is a serious mistake, based on the available conclusive scientific research that shows the opposite. PMID:25697213

  14. The pros and cons of phytoestrogens

    PubMed Central

    Patisaul, Heather B.; Jefferson, Wendy

    2011-01-01

    Phytoestrogens are plant derived compounds found in a wide variety of foods, most notably soy. A litany of health benefits including a lowered risk of osteoporosis, heart disease, breast cancer, and menopausal symptoms, are frequently attributed to phytoestrogens but many are also considered endocrine disruptors, indicating that they have the potential to cause adverse health effects as well. Consequently, the question of whether or not phytoestrogens are beneficial or harmful to human health remains unresolved. The answer is likely complex and may depend on age, health status, and even the presence or absence of specific gut microflora. Clarity on this issue is needed because global consumption is rapidly increasing. Phytoestrogens are present in numerous dietary supplements and widely marketed as a natural alternative to estrogen replacement therapy. Soy infant formula now constitutes up to a third of the US market, and soy protein is now added to many processed foods. As weak estrogen agonists/antagonists with molecular and cellular properties similar to synthetic endocrine disruptors such as Bisphenol A (BPA), the phytoestrogens provide a useful model to comprehensively investigate the biological impact of endocrine disruptors in general. This review weighs the evidence for and against the purported health benefits and adverse effects of phytoestrogens. PMID:20347861

  15. The Big Con: China's Historical Sabotage

    ERIC Educational Resources Information Center

    Terrence Cheng

    2009-01-01

    On June 4, 1989, the Chinese military, under orders from the highest levels of government, violently crushed peaceful civilian demonstrations in Beijing, most symbolically in and around Tiananmen Square. In the end, the Chinese government claimed that the death toll was approximately 200, but the Chinese Red Cross reported 2,000 to 3,000 deaths.…

  16. Proceedings of noise-con 91

    SciTech Connect

    Quinlan, D.A.; Prasad, M.G.

    1991-01-01

    This volume covers the following topics related to noise control: control of mine ventilation fans; physical phenomena; gas turbine exhaust system silencing; computer models for estimating electric utility environmental noise; noise from rotary coal car unloading; noise analysis.

  17. McLuhan: Pro and Con.

    ERIC Educational Resources Information Center

    Rosenthal, Raymond, Ed.

    Twenty-one critical essays on the ideas and works of Marshall McLuhan are offered in this review. In the course of the essays, McLuhan is characterized alternately as a genius, an extrapolator, and an oracle; a defender of the choice of choicelessness; a generalizer who rearranges, misinterprets, and misreads the facts to support his theses; an…

  18. Vacuum assist: angel or demon CON.

    PubMed

    Willcox, Timothy W

    2013-06-01

    Vacuum-assisted venous drainage (VAVD) to enhance venous return during cardiopulmonary bypass (CPB) was described as early as 1958 but was not widely used until the late 1990s. VAVD was initially used to facilitate the use of smaller cannulas with ministernotomy but was increasingly used to allow reduction in CPB circuit size while maintaining CPB flow rates. This innovation was made without planned consideration to CPB circuit design, most critically that of the venous reservoir. Clinical reports of prime reduction facilitated by VAVD in both adult and pediatric CPB were associated with reduced nadir hematocrit and rates of transfusion that encouraged the proliferation of VAVD in CPB. Concomitantly, investigators have reported both in vitro and in vivo significantly increased arterial emboli associated with the use of VAVD, mostly related to accelerated venous air entrainment. In vitro studies continue to confirm this association and likely underestimate the resulting embolic load as a result of flawed study design. While the evidence for VAVD is equivocal, our understanding of the clinical impact of gaseous microemboli in CPB is similarly limited, most likely confined to blood-brain barrier disruption. It is only after two decades that CPB component design is receiving serious attention in terms of air handling. The ethics of innovation in the field of CPB warrant careful consideration. The application of VAVD is not without consequence. PMID:23930383

  19. Too Many Minas Spoil The Con 

    E-print Network

    2007-02-13

    had to be the real one, which is nonsense, because men can't write proper porn. There's more to it than just the penis. I mean, erotica. Not porn. Um, sorry. That was just the first day. Day two had the writing panels and the surprise guest...

  20. Con: Weight loss prior to transplant: no.

    PubMed

    Detwiler, Randal K

    2015-11-01

    In large registries of hemodialysis patients, higher body mass index (BMI) is known to be associated with lower mortality rates, while weight loss associates with reduced survival. This so-called 'obesity paradox' includes patients categorized as overweight and obese. Transplantation in the obese patient population has been shown to improve quality of life and reduce mortality when compared with obese recipient candidates remaining on dialysis. Most transplant centers, however, restrict access to transplant based upon predetermined BMI cutoffs. This policy effectively mandates weight loss for many obese transplant candidates. However, BMI, though easily measured, is an inadequate assessment of nutritional status and lean muscle mass in obese patients. Regimens designed to prevent protein-energy wasting may include dietary recommendations and exercise programs that result in favorable changes in body composition without significantly impacting weight. The goal of weight loss is not achievable for many if not most obese dialysis patients. The consequence to the patient is reduced access to life improving transplantation. Patients are forced to pursue dietary, behavioral and possibly surgical interventions to accomplish weight loss despite limited evidence regarding the safety and utility of these interventions. The delay in transplantation also hinders the achievement of improved exercise capacity after successful transplant, a time when weight loss regimens may be safer and more effective. PMID:26359197

  1. Con curdino Utkning av tvrfljtens tonfrrd

    E-print Network

    Boye, Johan

    curdino ­ Extension of the compass of the flute to quarter tones by perturbation of tone hole geometry flutists the opportunity to play quarter tones on the regular orchestra flute (Böhm flute). The flutist is entered inside the flute. The kurdin consists of two parts which can reduce the diameter of two tone holes

  2. Deep discharge reconditioning: Pros and cons

    NASA Technical Reports Server (NTRS)

    Scott, W. R.

    1983-01-01

    Deep-discharge reconditioning (DDR) can be of great benefit to battery performance, especially in geosynchronous orbit, if performed properly and regularly, and can be essential to operation of batteries at the high depths of discharge (DOD) required to minimize weight. The procedure should be tailored to fit the nature of the degradation occuring during regular cycling. DDR is not without its drawbacks, however, and these differ depending on the normal DOD to be sustained and/or whether the discharge is done at the battery or the cell level. Battery-level discharge carries the minimum weight penalty but raises questions of the effects of low-rate cell reversal that as yet have no firm answers. Cell level discharge avoids cell reversal but carries significant penalties of weight and complexity. Thus no universal procedure or method of implementation of deep-discharge reconditioning is now available and thus the various approaches must be evaluated for each application.

  3. Vencemos Con Libros Y La Lengua.

    ERIC Educational Resources Information Center

    Duran, Daniel Flores, Comp.

    The city of Richmond, California has many residents who read and speak only Spanish, and many other Chicanos and Latin Americans who are interested in their heritage. The Service Center Branch of the public library has a collection of books, magazines, and records in Spanish and in English on the problems, history and culture of these people. This…

  4. Investigaccion-accion en la sala de clases sobre las creencias de la cultura de la ciencia de un grupo de estudiantes universitarios y su relacion reciproca con el aprendizaje de las ciencias biologicas

    NASA Astrophysics Data System (ADS)

    Cordova-Santiago, Lizzette Astrid

    La investigacion---accion que se llevo a cabo en la sala de clases tenia como punto de partida las creencias de la cultura de la ciencia de un grupo de estudiantes universitarios para luego examinar sus implicaciones en el proceso de aprendizaje de las Ciencias Biologicas. ¿Que se supone que hagan las creencias en relacion con el aprendizaje? ¿En que consiste incorporar este aspecto a la practica educativa universitaria? Utilizando el modelo de Kemmis y McTaggart (1987) la investigacion-accion se planteo como un proceso dinamico en cuatro momentos en espiral constituidos por la planificacion, la accion, la observacion y la reflexion. Cada una de las fases tuvo una intencion retrospectiva y prospectiva formando una espiral de autorreflexion del conocimiento y la accion. Se llevaron a cabo audio grabaciones en clases y analisis de documentos. Ademas, la profesora-investigadora hizo un portafolio para reflexionar sobre las creencias de la cultura de la ciencia que tienen los estudiantes y las creencias del aprendizaje que tiene la profesora y sobre como la comprension de estos elementos ayudo a mejorar su practica educativa a traves del tiempo. Los resultados obtenidos apuntan a que las creencias de la cultura de la ciencia que tiene el grupo de estudiantes son diversas. Ellos si creen que la ciencia tiene una cultura la cual describieron como: complicada y desconocida que evoluciona constantemente, que es un conjunto de metodos, que es altamente tecnologica, que resuelve problemas de salud, ayuda a interpretar la realidad del mundo que los rodea y su origen y que existen unas intersecciones entre la ciencia y el poder. Sobre las creencias del proceso de aprendizaje de la profesora-investigadora, estas senalan que el modelaje de actores, la vision de la academia que tiene ella asi como la participacion y negociacion entre todos los involucrados en el proceso educativo, son factores que inciden en el proceso de aprendizaje.

  5. Science Drivers for Con-XScience Drivers for Con-X Presented by

    E-print Network

    Garcia, Michael

    and their effect on galaxy formation Dark Matter and Dark Energy Use clusters of galaxies to trace the locations of Dark Matter and as independent probes to constrain the amount and evolution of Dark Energy Search for the missing baryonic matter in the Cosmic Web Cycles of Matter and Energy Study dynamics of Cosmic Feedback

  6. The nature of the Ailao Shan-Red River (ASRR) shear zone: Constraints from structural, microstructural and fabric analyses of metamorphic rocks from the Diancang Shan, Ailao Shan and Day Nui Con Voi massifs

    NASA Astrophysics Data System (ADS)

    Liu, Junlai; Tang, Yuan; Tran, My-Dung; Cao, Shuyun; Zhao, Li; Zhang, Zhaochong; Zhao, Zhidan; Chen, Wen

    2012-03-01

    The structural geology, timing of shearing, and tectonic implications of the ASRR shear zone, one of the most striking lineaments in Southeast Asia, have been the topics of extensive studies over the past few decades. The Xuelong Shan (XLS), Diancang Shan (DCS), Ailao Shan (ALS) and Day Nui Con Voi (DNCV) metamorphic massifs along the shear zone have preserved important information on its structural and tectonic evolution. Our field structural analysis, detailed microstructural and fabric analysis, as well as the quartz, sillimanite and garnet fabric studies of the sheared rocks from the massifs demonstrate the dominant roles of three deformation episodes during Cenozoic tectonic evolution in the shear zone. Among the contrasting structural and microstructural associations in the shear zone, D2 structures, which were formed at the brittle to ductile transition during large-scale left-lateral shearing in the second deformation episode, predominate over the structural styles of the other two deformation episodes. Discrete micro-shear zones with intensive grain size reduction compose the characteristic structural style of D2 deformation. In addition, several types of folds (early shearing folds, F21, and late-shearing folds, F22) were formed in the sheared rocks, including discrete to distributed mylonitic foliation, stretching lineation and shear fabrics (e.g., mica fish, domino structures, as well as sigma and delta fabrics). A sequence of microstructures from syn-kinematic magmatic flow, high-temperature solid-state deformation, to brittle-ductile shearing is well-preserved in the syn-kinematic leucocratic intrusions. Deformation structures from the first episode (D1) are characterized by F1 folds and distributed foliations (S1) in rocks due to pure shearing at high temperatures. They are preserved in weakly sheared (D2) rocks along the eastern margin of the ALS belt or in certain low-strain tectonic enclaves within the shear zone. Furthermore, semi-brittle deformation structures, such as hot striae and discrete retrogression zones, are attributed to normal-slip shearing in the third deformation episode (D3), which was probably locally active, along the eastern flank of the DCS range, for example. There are four quartz c-axis fabric patterns in the mylonitic rocks, including type A point maxima, type B Y point maxima with crossed girdles superimposition, type C quadrant maxima, as well as type D point and quadrant maxima combination. They are consistent with microscopic observations of microstructures of high-temperature pure shearing, low-temperature simple shearing and their superimposition. Integrated microstructural analysis and fabric thermometer studies provide information on both high temperature (up to 750 °C) and dominant low-temperature (300-600 °C) deformations of quartz grains in different rock types. Sillimanite and garnet fabrics, especially the latter, were primarily formed at the peak metamorphism during high-temperature pure shearing. The above structural, microstructural and fabric associations were generated in the tectonic framework of the Indian-Eurasian collision. The low-temperature microstructures and fabrics are attributed to left-lateral shearing along the ASRR shear zone from 27 to 21 Ma during the southeastward extrusion of the Indochina block, which postdated high-temperature deformation at the peak metamorphism during the collision.

  7. The Meanings of Astronomical Observation: An Analysis on the Basis of Relationship with Knowledge. (Spanish Title: Los Sentidos de la Observación Astronómica: un Análisis sobre la Base de la Relación con el Saber.) Os Sentidos da Observação Astronômica: Uma Análise com Base na Relação com o Saber

    NASA Astrophysics Data System (ADS)

    Klein, Alberto Eduardo; de Mello Arruda, Sergio; Meneghello Passos, Marinez; Vinicius Domenes Zapparoli, Ferdinando

    2010-12-01

    This article presents results of a research which aimed to understand the meanings that people construct for astronomical observation. The subjects, students and school teachers, initially received some instruction on how to view astronomical objects through the telescope. After the observation was realized, they were interviewed. The data analysis allowed the creation of 12 categories, later interpreted on the basis of relationship with knowledge (relation to the world, with himself and with others), as presented by Bernard Charlot. Este artículo presenta los resultados de una investigación que tuvo como objetivo comprender los sentidos que las personas construyen para la observación astronómica. Los sujetos, los estudiantes y maestros de escuela, recibieron inicialmente algunas instrucciones sobre cómo ver los objetos astronómicos a través del telescopio. Al término de la observación, fueron entrevistados. El análisis de datos permitió la creación de 12 categorías que más tarde fueron interpretadas sobre la base de la relación con el conocimiento (relación con el mundo, consigo mismo y con los demás), tal como presentado por Bernard Charlot. Este artigo apresenta resultados de uma pesquisa que objetivou entender quais os sentidos que as pessoas constroem para a observação astronômica. Os sujeitos da pesquisa, estudantes e professores do ensino médio, receberam inicialmente alguma instrução sobre como visualizar os objetos astronômicos através do telescópio. Após a realização da observação, eles foram entrevistados. A análise dos dados permitiu a elaboração de 12 categorias que foram posteriormente interpretadas com base nas relações com o saber (relação com o mundo, consigo mesmo e com o outro), conforme apresentadas por Bernard Charlot.

  8. Effect of Boron Addition on the Thermal, Degradation, and Cytocompatibility Properties of Phosphate-Based Glasses

    PubMed Central

    Hasan, Muhammad S.; Parsons, Andrew J.; Furniss, David; Scotchford, Colin A.; Ahmed, Ifty; Rudd, Chris D.

    2013-01-01

    In this study eight different phosphate-based glass compositions were prepared by melt-quenching: four in the (P2O5)45-(CaO)16-(Na2O)15-x -(MgO)24-(B2O3)x system and four in the system (P2O5)50-(CaO)16-(Na2O)10-x-(MgO)24-(B2O3)x, where x = 0,1, 5 and 10?mol%. The effect of B2O3 addition on the thermal properties, density, molar volume, dissolution rates, and cytocompatibility were studied for both glass systems. Addition of B2O3 increased the glass transition (Tg), crystallisation (Tc), melting (Tm), Liquidus (TL) and dilatometric softening (Td) temperature and molar volume (Vm). The thermal expansion coefficient (?) and density (?) were seen to decrease. An assessment of the thermal stability of the glasses was made in terms of their processing window (crystallisation onset, Tc,ons minus glass transition temperature, Tg), and an increase in the processing window was observed with increasing B2O3 content. Degradation studies of the glasses revealed that the rates decreased with increasing B2O3 content and a decrease in degradation rates was also observed as the P2O5 content reduced from 50 to 45?mol%. MG63 osteoblast-like cells cultured in direct contact with the glass samples for 14 days revealed comparative data to the positive control for the cell metabolic activity, proliferation, ALP activity, and morphology for glasses containing up to 5?mol% of B2O3. PMID:23991425

  9. Structure property correlation in lithium borophosphate glasses.

    PubMed

    Tho, T D; Prasada Rao, R; Adams, S

    2012-01-01

    To investigate the influence of cation mobility variation due to the mixed glass former effect, 0.45Li(2)O-(0.55-x)P(2)O(5)-xB(2)O(3) glasses (0?x?0.55) are studied keeping the molar ratio of Li(2)O/(P(2)O(5)+B(2)O(3)) constant. Addition of B(2)O(3) into lithium phosphate glasses increases the glass transition temperature (T(g)) and number density, decreases the molar volume, and generally renders the glasses more fragile. The glass system has been characterised experimentally by XRD, XPS and impedance studies and studied computationally by constant volume molecular dynamics (MD) simulations and bond valence (BV) method to identify the structural variation with increasing the B(2)O(3) content, its consequence for Li(+) ion mobility, as well as the distribution of bridging and non-bridging oxygen atoms. These studies indicate the increase of P-O-B bonds (up to Y=[B(2)O(3)]/([B(2)O(3)]+[P(2)O(5)])?0.5 and B-O-B bonds, as well as the decrease of P-O-P bonds and non-bridging oxygens (NBOs) with rising B(2)O(3) content. The system with Y?0.5 exhibits maximum ionic conductivity, 1.0×10(-7) S cm(-1), with activation energy 0.63 V. Findings are rationalised by a model of structure evolution with varying B(2)O(3) content Y and an empirical model quantifying the effect of the various structural building blocks on the ionic conductivity in this mixed glass former system. PMID:22286561

  10. Toward a Rational Design of Bioactive Glasses with Optimal Structural Features: Composition–Structure Correlations Unveiled by Solid-State NMR and MD Simulations

    PubMed Central

    2013-01-01

    The physiological responses of silicate-based bioactive glasses (BGs) are known to depend critically on both the P content (nP) of the glass and its silicate network connectivity (N?BOSi). However, while the bioactivity generally displays a nonmonotonic dependence on nP itself, recent work suggest that it is merely the net orthophosphate content that directly links to the bioactivity. We exploit molecular dynamics (MD) simulations combined with 31P and 29Si solid-state nuclear magnetic resonance (NMR) spectroscopy to explore the quantitative relationships between N?BOSi, nP, and the silicate and phosphate speciations in a series of Na2O–CaO–SiO2–P2O5 glasses spanning 2.1 ? N?BOSi ? 2.9 and variable P2O5 contents up to 6.0 mol %. The fractional population of the orthophosphate groups remains independent of nP at a fixed N?BOSi-value, but is reduced slightly as N?BOSi increases. Nevertheless, P remains predominantly as readily released orthophosphate ions, whose content may be altered essentially independently of the network connectivity, thereby offering a route to optimize the glass bioactivity. We discuss the observed composition-structure links in relation to known composition-bioactivity correlations, and define how Na2O–CaO–SiO2–P2O5 compositions exhibiting an optimal bioactivity can be designed by simultaneously altering three key parameters: the silicate network connectivity, the (ortho)phosphate content, and the nNa/nCa molar ratio. PMID:24364818

  11. Multivariate analyses of Erzgebirge granite and rhyolite composition: Implications for classification of granites and their genetic relations

    USGS Publications Warehouse

    Forster, H.-J.; Davis, J.C.; Tischendorf, G.; Seltmann, R.

    1999-01-01

    High-precision major, minor and trace element analyses for 44 elements have been made of 329 Late Variscan granitic and rhyolitic rocks from the Erzgebirge metallogenic province of Germany. The intrusive histories of some of these granites are not completely understood and exposures of rock are not adequate to resolve relationships between what apparently are different plutons. Therefore, it is necessary to turn to chemical analyses to decipher the evolution of the plutons and their relationships. A new classification of Erzgebirge plutons into five major groups of granites, based on petrologic interpretations of geochemical and mineralogical relationships (low-F biotite granites; low-F two-mica granites; high-F, high-P2O5 Li-mica granites; high-F, low-P2O5 Li-mica granites; high-F, low-P2O5 biotite granites) was tested by multivariate techniques. Canonical analyses of major elements, minor elements, trace elements and ratio variables all distinguish the groups with differing amounts of success. Univariate ANOVA's, in combination with forward-stepwise and backward-elimination canonical analyses, were used to select ten variables which were most effective in distinguishing groups. In a biplot, groups form distinct clusters roughly arranged along a quadratic path. Within groups, individual plutons tend to be arranged in patterns possibly reflecting granitic evolution. Canonical functions were used to classify samples of rhyolites of unknown association into the five groups. Another canonical analysis was based on ten elements traditionally used in petrology and which were important in the new classification of granites. Their biplot pattern is similar to that from statistically chosen variables but less effective at distinguishing the five groups of granites. This study shows that multivariate statistical techniques can provide significant insight into problems of granitic petrogenesis and may be superior to conventional procedures for petrological interpretation.

  12. Polycarboxylic acids as network modifiers for water durability improvement of inorganic organic hybrid tin-silico-phosphate low-melting glasses

    NASA Astrophysics Data System (ADS)

    Menaa, Bouzid; Mizuno, Megumi; Takahashi, Masahide; Tokuda, Yomei; Yoko, Toshinobu

    2006-02-01

    We investigated the water durability of the inorganic-organic hybrid tin-silico-phosphate glasses Me 2SiO-SnO-P 2O 5 (Me designs the organic methyl group) doped with organic acids (salicylic acid (SA), tartaric acid (TA), citric acid (CA) and butane tetracarboxylic acid (BTCA)) containing one or more of carboxylic groups per molecule. The structure, thermal properties and durability of the final glasses obtained via a non-aqueous acid-base reaction were discussed owing to the nature and the concentration of the acid added. 29Si magic angle spinning (MAS) NMR and 31P MAS NMR spectra, respectively, showed clearly a modification of the network in the host glass matrix of the Me 2SiO-SnO-P 2O 5 system. The polycondensation enhancement to form -P-O-Si-O-P- linkages (PSP) and the increase of the Q2 unit (two bridging oxygens per phosphorus atom) over the Q3 unit (three bridging oxygens per phosphorus atom) as a function of the acid in the order SAP 2O 5 matrix. In addition, this structural change is accompanied by a decrease of the coefficient of thermal expansion and an increase of the water durability of the glasses with the acids containing a large number of carboxylic groups per molecule. The presence of carboxylic groups of the acid acting as network modifier may retard the movement of water molecules through the glasses due to the steric hindrance strengthening the PSP connections in a chain-like structure.

  13. Geogenic and agricultural controls on the geochemical composition of European agricultural soils

    NASA Astrophysics Data System (ADS)

    Mol, Gerben; Saaltink, Remon; Griffioen, Jasper; Birke, Manfred

    2014-05-01

    Purpose: Concern about the environmental impact of agriculture caused by intensification is growing as large amounts of nutrients and contaminants are introduced into the environment. The aim of this paper is to identify the geogenic and agricultural controls on the elemental composition of European, grazing and agricultural soils. Materials and methods: Robust factor analysis was applied to data series for Al,B,Ca, Cd,Co, Cu, Fe, K, Mg,Mn, Na,Ni, P, S, Se, Sr, U, Zn (ICP-MS) and SiO2, K2O, Na2O, Fe2O3, Al2O3 (XRF) based on the European GEMAS dataset. In addition, the following general soil properties were included: clay content, pH, chemical index of alteration (CIA), loss on ignition (LOI), cation exchange capacity (CEC), total organic carbon (TOC) and total carbon and total sulfur. Furthermore, this dataset was coupled to a dataset containing information of historic P2O5 fertilization across Europe. Also, a mass balance was carried out for Cd, Cu and Zn to determine if concentrations of these elements found in the soils have their origin in historic P2O5 fertilization. Results and discussion: Seven geogenic factors and one agricultural factor were found of which four prominent ones (all geogenic): chemical weathering, reactive iron-aluminum oxide minerals, clay minerals and carbonate minerals. Results for grazing and agricultural soils were near identical, which further proofs the prominence of geogenic controls on the total elemental composition. When the cumulative amount of P2O5 fertilization was considered, no extra agriculture-related factors became visible. The mass balance confirms these observations. Conclusion: Overall, the geological controls are more important for the total soil chemistry in agricultural and grazing land soils than the anthropogenic controls.

  14. Low temperature fabrication of high strength porous calcium phosphate and the evaluation of the osteoconductivity.

    PubMed

    Yu, Xianzhu; Cai, Shu; Xu, Guohua; Zhou, Wei; Wang, Dongmei

    2009-10-01

    Porous NaO(2)-MgO-CaO-P(2)O(5) bioglass doped beta-tri-calcium phosphate (beta-TCP) bioceramic possessing high mechanical properties and well pore structure with high porosity and high pore connectivity has been prepared through dipping method with the porous polyurethane as the pore forming template. The sintering mechanism and the mechanical properties of the bioglass doped beta-TCP scaffold have been investigated by the X-ray diffraction (XRD) analysis, Scanning electron microscope (SEM) and thermal differential analysis (DTA). The scaffold's in vivo osteoconductivity has been evaluated by implantation of scaffolds into the femurs of New Zealand rabbits. The results show that the porous structure can achieve the densification process at a low temperature about 950 degrees C by a solid solution sintering mechanism and hence dense macropore scaffold with a compressive strength of 4.32 MPa when the porosity is 75% has been obtained. The in vivo test shows that the Na(2)O-MgO-CaO-P(2)O(5) bioglass doped porous beta-TCP bioceramic has a relatively fast bone formation after implantation; after 1 month implantation new deposited bone tissue has been detected on the strut of the porous scaffold and degraded particles also has been found on the surface of the new formed bone. After 6 months implantation the porous scaffold has been thoroughly covered with new formed bone. Results show that the Na(2)O-MgO-CaO-P(2)O(5) bioglass doped porous beta-TCP bioceramic is potential bone tissue engineering scaffold for orthopedic use. PMID:19424778

  15. Management of Striga hermonthica on sorghum (Sorghum bicolor) using arbuscular mycorrhizal fungi (Glomus mosae) and NPK fertilizer levels.

    PubMed

    Isah, K M; Kumar, Niranjan; Lagoke, S T O; Atayese, M O

    2013-11-15

    Trials were conducted in the screen house of Niger State College of Agriculture, Mokwa (09 degrees 18'N; 05 degrees 04'E) in the Southern Guinea Savannah agro-ecological zone of Nigeria during October-December, 2008 and January-March, 2009. The objective was to evaluate the effect of management of Striga hermonthica on sorghum (Sorghum bicolor) using Arbuscular mycorrhizal fungi and NPK fertilizer levels. The trials were laid out in split-split plot arrangement in a randomized complete block design. The main-plot treatments consisted of three sorghum varieties; SAMSORG 3, ICSVIII and SAMSORG 14 while the sub-plot treatments consisted of inoculations; Striga mixed with Glomus, Striga only and Glomus only as well as no inoculation control. The sub-sub-plot treatments were made up of NPK fertilizer levels; (100 kg N, 50 kg P2O5, 50 kg K2O ha(-1)), (50 kg N, 50 kg P2O5, 50 kg K2O ha(-1)) and (0 kg N, 0 kg P2O5, 0 kg K2O ha(-1)). The result obtained showed that sorghum variety SAMSORG 3 were taller, having more vigour and lower reaction to Striga parasitism which resulted in the crop producing higher dry matter compared to the other two varieties. The plots inoculated with Striga only supported shorter plants of sorghum varieties, higher vigour and lower reaction score to Striga compared to Striga mixed with Glomus. It is obvious in this study that the crop performance increases with increase in the rates of NPK fertilizer applied. PMID:24511701

  16. Some developments on ceramic-to-metal and glass-ceramics-to-metal seals and related studies

    NASA Astrophysics Data System (ADS)

    Kothiyal, G. P.; Goswami, M.; Shrikhande, V. K.

    2008-05-01

    Seals and coatings based on ceramics and glass-ceramics find numerous applications in different disciplines of science and technology including space, accelerators, nuclear energy, chemical industry. Ceramic-to-metal (CM) seals based on conventional design (using brazing alloys) and glass-ceramics have been prepared. While Ag-Cu brazing alloy has been used in conventional CM seal, we have employed lithium zinc silicate (LZS) and lithium aluminum silicate (LAS) glass-ceramics for glass-ceramics-to-metal (GCM) seals. LZS glass-ceramics based on two different compositions; (a) LZSL composition (wt.%)- Li2O: 12.65, ZnO: 1.85, SiO2: 74.4, Al2O3: 3.8, K2O: 2.95, P2O5: 3.15, and B2O3: 1.2 (low ZnO) and (b) LZSH composition (wt.%)- Li2O: 8.9, ZnO: 24.03, SiO2: 53.7, Na2O: 5.42, P2O5: 2.95, and B2O3: 5.0 (high ZnO) were prepared with desired sealing characteristics for matched type seals. In addition, (wt.%) 12.6Li2O-71.7SiO2-5.1Al2O3-4.9K2O-3.2B2O3-2.5P2O5 (LAS-GC) was investigated for compressive type of seal. LZS glass-ceramics-to-Cu as well as SS-321 seals were found to withstand a vacuum of 10-6 Torr with leak rate 10-9 Torr. 1/s and LAS GC-to-SS304 seal showed high pressure endurance of 12000psi. In order to understand the mechanism of sealing, glass-ceramics-to-metal interface study has also been carried out.

  17. [Effects of irrigation using dairy effluent on grain yield, phosphorus utilization and distribu- tion in soil profile in winter wheat-summer maize rotation system].

    PubMed

    Du, Hui-ying; Feng, Jie; Guo, Hai-gang; Wang, Feng; Zhang, Ke-qiang

    2015-08-01

    Field experiments of winter wheat-summer maize rotation were conducted in North China Plain irrigation area to explore the effects of wheat season irrigation with dairy effluent on grain yield, phosphorus uptake, accumulative phosphorus usage efficiency and phosphorus accumulation in soil. The results showed that the irrigation with dairy effluent significantly improved the yields of winter wheat and summer maize. With the increasing of P2O5 carried by dairy effluent into soil, winter wheat yield increased at first and then decreased. When the P2O5 increased 137 kg · hm(-2), winter wheat yield increased to the maximum (7646.4 kg · hm(-2)) and the phosphorus utilization rate was the highest (24.8%). But excessive phosphorus decreased the winter wheat yield and phosphorus utilization efficiency. Summer maize yield and phosphorus uptake increased with the increase of P2O5 carried by dairy effluent. The summer maize yield increased by 2222.4-2628.6 kg · hm(-2) and the phosphorus uptake increased by 13.9-21.1 kg · hm(-2) in contrast to the control (CK). Under conventional phosphorus fertilization at 88 kg · hm(-2), and the summer maize yield increased by 2235.0 kg · hm(-2) compared with CK. As the time of irrigation with dairy effluent increasing, the grain yield increased more significantly. The cumulative phosphorus utilization in this rotation system increased year by year. After six seasons of crop harvest, the cumulative phosphorus utilization rate increased into 40.0%-47.7%. Under the experimental condition, two times of irrigation with the dairy effluents in the winter wheat-summer maize rotation system was the best operating mode. PMID:26685601

  18. Phosphate mineral formation in Lake Baikal sediments and implications for paleoclimate

    NASA Astrophysics Data System (ADS)

    Fagel, N.; Alleman, L. Y.; André, L.; Cloots, R.; Hatert, F.; Juvigné, E.; Renson, V.

    2003-04-01

    The more than 20 million years old Lake Baikal sedimentary record provides a good climate archive. While most paleoclimate reconstructions are mainly based on biotic proxies, we tested in this study other minerogenic tracers. In particular, it was suggested that the formation of authigenic and/or diagenetic phosphate minerals in Baïkal sediments underlines transitions from glacial to interglacial periods (Deike et al., 1997). The phosphate mineral formation previously evidenced (Müller et al., 2002) may be sensitive to suspended sediment concentrations: glacial periods are characterised by high detrital discharge, interglacial intervals are marked by low detrital supply but high biogenic sedimentation. Phosphate minerals were observed in Baïkal sediments from recent to 65 kyr BP. Their abundance was related to the sedimentation rate, the phosphate enrichment layers being particularly common on low sedimentation site, i.e., the Academician Ridge. Major and trace elements have been analysed by ICP-AES and ICP-MS on four cores drilled on topographic hills, in the southern basin (Posolsky bank, CON01-604), in the central part (Academician Ridge, VER98-1-3 and VER98-1-14) and in the northern basin (Continent Ridge, CON01-603). The geochemical signature is consistent with the occurrence of Mn-Fe-phosphate minerals. For instance P2O5 reaches up to 3% wt. relative to a mean value of 0.3 in the background sediment, MnO2 presents an enrichment factor up to 6. There is no associated enrichment in any of the trace elements measured at the same levels. In the sediments, those P-Mn-Fe rich levels are related either to sparse millimetric dark concretions or to a layer (or a group of layers) defined by an alignment of numerous concretions but there is no so-called crusts. The concretions, isolated by >63 mm sieving, present a lamellar morphology. They are identified as Fe-phosphate phases with a variable proportion of Mn. The powder diffraction diagram is consistent with vivianite, a mineral that has been previously characterized in lacustrine sediments worldwide, including Baïkal. However, its precise formation process is not yet fully understood. Dean et al. (2002) emphasize that the occurrence of phosphate minerals in Elk lake (USA) is indicative of the paleo-productivity of the water-column. For Deike et al. (2002), phosphate crusts mainly accumulate under slow sedimentation conditions. We discuss the paleo-environmental implications of the occurrence of phosphate minerals in sediments. By studying the distribution of the phosphate concretions in sedimentary columns characterised under different sedimentary conditions, we would like to point up the implications of phosphate minerals for paleoclimate reconstruction. Dean et al., 2002. A 1500-year record of climatic and environmental change in Elk Lake, Cearwater County, Minnesota II : Geochemistry , mineralogy, and stable isotopes. J. Paleolimn. 27, 301-319. Müller et al., 2002. P, As, Sb, Mo, and other elements in sedimentary Fe/Mn layers of Lake Baïkal, Environmental Science and Technology, 36, 411-420. Deike et al., 1997. Formation of ferric iron crusts in quaternnary sediments of Lake Baikal, Russia and implications for paleoclimate. Marine Geology 139, 21-46.

  19. Cation distributions on rapidly solidified cobalt ferrite

    NASA Technical Reports Server (NTRS)

    De Guire, Mark R.; Kalonji, Gretchen; O'Handley, Robert C.

    1990-01-01

    The cation distributions in two rapidly solidified cobalt ferrites have been determined using Moessbauer spectroscopy at 4.2 K in an 8-T magnetic field. The samples were obtained by gas atomization of a Co0-Fe2O3-P2O5 melt. The degree of cation disorder in both cases was greater than is obtainable by cooling unmelted cobalt ferrite. The more rapidly cooled sample exhibited a smaller departure from the equilibrium cation distribution than did the more slowly cooled sample. This result is explained on the basis of two competing effects of rapid solidification: high cooling rate of the solid, and large undercooling.

  20. Gas atomization of cobalt ferrite-phosphate melts

    NASA Technical Reports Server (NTRS)

    De Guire, Mark R.; O'Handley, R. C.; Kalonji, G.

    1989-01-01

    XRD, Moessbauer spectroscopy, and EDXS have been used to characterize a rapidly-solidified (Co,Fe)3O4 spinel generated in a cobalt-iron-phosphate glass matrix by gas atomization of melts. Of the two compositions tested, that containing 20 mol pct P2O5 exhibited randomly-oriented ferrite crystallization whose growth appears to have been diffusion-controlled. Unlike the ferrite, in which the iron has both tetrahedral and octahedral coordination, the iron in the glassy matrix was primarily of distorted-octahedral coordination. Calculations indicate that the cooling rates obtained with oxide melts vary strongly with droplet size, but less strongly with melt temperature.

  1. Preparation of glasses for radiotherapy by ion implantation

    NASA Astrophysics Data System (ADS)

    Kawashita, M.; Yao, T.; Miyaji, F.; Kokubo, T.; Takaoka, G. H.; Yamada, I.

    1995-08-01

    31P can be activated to ?-emitter 32P by neutron bombardment. Chemically durable glasses containing a large amount of phosphorus is believed to be useful for in situ irradiation of cancers. A silica glass was implanted with phosphorus ion, heat-treated at 400°C in H 2 to make phosphorus colloids grow, then heat-treated at 900°C in O 2 in order to encapsulate the colloids with thin SiO 2?P 2O 5 glass layer. Thus treated glass showed little dissolution even in hot water and is expected to be useful for radiotherapy.

  2. Phosphorus Equilibria Among Mafic Silicate Phases

    NASA Technical Reports Server (NTRS)

    Berlin, Jana; Xirouchakis, Dimitris

    2002-01-01

    Phosphorus incorporation in major rock-forming silicate minerals has the following implications: (1) Reactions between phosphorus-hosting major silicates and accessory phosphates, which are also major trace element carriers, may control the stability of the latter and thus may affect the amount of phosphorus and other trace elements released to the coexisting melt or fluid phase. (2) Less of a phosphate mineral is needed to account for the bulk phosphorus of planetaty mantles. (3) During partial melting of mantle mineral assemblages or equilibrium fractional crystallization of basaltic magmas, and in the absence or prior to saturation with a phosphate mineral, silicate melts may become enriched in phosphorus, especially in the geochemically important low melt fraction regime, Although the small differences in the ionic radii of IVp5+, IVSi4+, and IV Al3+ makes phosphoms incorporation into crystalline silicates perhaps unsurprising, isostructural silicate and phosphate crystalline solids do not readily form solutions, e.g., (Fe, Mg)2SiO4 vs. LiMgPO4, SiO)2 VS. AlPO4. Nonetheless, there are reports of, poorly characterized silico-phosphate phases in angrites , 2-4 wt% P2O5 in olivine and pyroxene grains in pallasites and reduced terestrial basalts which are little understood but potentially useful, and up to 17 wt% P2O5 in olivine from ancient slags. However, such enrichments are rare and only underscore the likelihood of phosphoms incorporation in silicate minerals. The mechanisms that allow phosphorus to enter major rock-forming silicate minerals (e.g., Oliv, Px, Gt) remain little understood and the relevant data base is limited. Nonetheless, old and new high-pressure (5-10 GPa) experimental data suggest that P2O5 wt% decreases from silica-poor to silica-rich compositions or from orthosilicate to chain silicate structures (garnet > olivine > orthopyroxene) which implies that phosphorus incorporation in silicates is perhaps more structure-than site-specific. The data also indicate that DXVliQP2O5 decrease in the same order, but DOVLiQP2O5 and DOpx/LiQP205 are likely constant, respectively equal to 0.08(3) and 0.007(4), in contrast, DG1ILiQP205 increases from 0.15(3) to 0.36(10) as garnet becomes majoritic, thus silica-enriched, and may also depend on liquid composition (SiO2, P2O5 and Na2O wt%).

  3. The aluminum phosphate zone in the Peace River area, land-pebble phosphate field, Florida

    USGS Publications Warehouse

    Cathcart, James B.

    1953-01-01

    The Peace River area, comprising T. 30 and 31 S., R. 24 and 25 E., contains a thicker and more persistent aluminum phosphate zone, and one that is higher in P2O5 and uranium content than is known elsewhere in the land-pebble phosphate district. This report has been prepared to bring together all of the information on the aluminum phosphate zone in the area where the first plant to treat this material will probably be located. The area may be divided into three physiographic units, (1) the ridge, (2) the flatwoods, and (3) the valley. Maps showing distribution and grade of the aluminum phosphate zone indicate that the zone is thin or absent in the ridge unit, thickest and most persistent, and of the best grade in P2O5 and uranium in the flatwoods unit, and absent or very low in grade in the valley unit. Maps of thickness and of chemical composition show that even in favorable areas there are places where the aluminum phosphate zone is missing or of questionable economic importance. The distribution maps also show that areas of high P2O5 and high uranium content coincide closely. Areas containing thick aluminum phosphate material usually have high uranium and P2O5 contents. It is estimated that an average of 13,000 tons per day of aluminum phosphate material might be mined from this area. This figure is based on the probable amount of time, per year, that mining would be in favorable ground. When all mines in the area are in favorable ground, the tonnage per day might be about 23,000 tons. Tonnages of aluminum phosphate material have been computed for about 36 percent of the area of T. 30 S., R. 25 E., and for 18 percent of the area of T. 31 S., R. 25 E. The total inferred tonnage is about 150,000,000 short tons, with an average grade of 0.012 percent U3O8.

  4. Experimental Modeling of Peridotite Melting with Alkali-Carbonate Fluid at P = 3.9 GPa, T=1250°C

    NASA Astrophysics Data System (ADS)

    Kostyuk, Anastasia; Gorbachev, Nikolay; Nekrasov, Alexey

    2014-05-01

    The close association of alkaline and ultramafic rocks with carbonatites, apatite and sulfide mineralization, as well as features of the melt compositions, tell us about the mantle source and the importance of alkaline-carbonate fluids in the genesis of these rocks. Experimental modeling of formation of alkali silicate, carbonate and sulfide melts was carried out in the system peridotite-alkaline-carbonate fluid (K, Na)2CO3 with additives of apatite, nickel-containing pyrrhotite, ilmenite and zircon as accessory minerals at P= 3.9 GPa and T=1250°C. Composition of coexisting melts, phase relationships, behavior of titanium, phosphorus, sulfur and zircon have been studied in this system. Liquidus association of phlogopite-clinopyroxene-zircon-X-phase (not diagnosed titanium and phosphorus-containing aluminosilicate phase) cemented by intergranular silicate glass with inclusions of carbonate and sulphide phases at partial (10%) melting of peridotite. Morphology, composition and relations of silicate glass, carbonate and sulfide globules indicate the existence of immiscible silicate, carbonate and sulfide melts at the experimental conditions. The composition of the silicate melt is phonolite, carbonate melt - significantly calcium composition with an admixture of alkali metal and silicate components. Solubility of zircon in silicate melt reached up to 0.8 wt.% of ZrO2, in coexisting carbonate melt - up to 1.5 wt.%. Absence of ilmenite and apatite in the experimental samples due to their high solubility in the coexisting phases. Concentration of TiO2 and P2O5 in silicate melt reached 2 wt. %. The concentration of TiO2 in the carbonate melt up to 1.7 wt.% and P2O5 up to 14 wt.%. The sulfur concentration in these melts does not exceed 0.2 wt.%. Concentrators of titanium and phosphorus among liquidus minerals were X-phase and phlogopite - 8 wt.% TiO2 and up to 3 wt.% P2O5 in the X-phase; up to 6 wt.% TiO2 and up to 2.5 wt.% of P2O5 in the phlogopite. The distribution coefficients of major elements (including Ti, P, S, Zi) between coexisting silicate and carbonate melts demonstrated that Mn, Zr, S, Ca, P preferably concentrated in the carbonate melt; Si, Al, K, Mg, Fe, Ti - in the silicate melt. Supporting by grant RFBR 14-05-00752a

  5. Magnetic studies of silico-phosphate glass-ceramics containing Ag and iron oxide

    NASA Astrophysics Data System (ADS)

    Sharma, K.; Prajapat, C. L.; Singh, M. R.; Kothiyal, G. P.

    2013-02-01

    The magnetic properties of 25SiO2-(50-x)CaO-15P2O5-8Fe2O3-2ZnO-xAg (where x = 0, 2 and 4 mol %) glass-ceramics have been studied. The microstructure as seen by scanning electron microscopy (SEM) exhibits formation of nano size particles. Magnetic studies revealed an increase in saturation magnetization with addition of 4 mol % Ag. Increase in Ag content also results in increase in the strength of magnetic interactions.

  6. Phosphorus and other trace elements from secondary olivine in composite mantle xenoliths (CMX) from Cima Volcanic Field (CVF; California, USA): implications for crystal growth kinetics

    NASA Astrophysics Data System (ADS)

    Baziotis, Ioannis; Asimow, Paul; Ntaflos, Theodoros; Boyce, Jeremy; Koroneos, Antonios; Perugini, Diego; Liu, Yongsheng; Klemme, Stephan; Berndt, Jasper

    2015-04-01

    Phosphorus(P)-rich zones in olivine may reflect excess incorporation of P during rapid growth; zoning patterns may then record growth rate variations (Milman-Barris et al., 2008; Stolper et al., 2009). We report data on interior cuts of two CMX from alkali basalt flows (Mukasa & Wilshire, 1997) in the CVF with second-generation P-rich olivines. In Ci-1-196, a dark layer (~200 ?m wide) between lherzolite and websterite is interpreted as a rapidly crystallized melt layer (ML), consisting of Ol+Gl+Pl+Spl+Cpx+Ap+Ilm. Glass (~15 vol%) is variable in composition (P2O5 ?1.2 wt%, Li 8.22-20.0 ppm). Olivines in the layer have 0.03-0.62 wt% P2O5; P-rich Ol (P2O5 >0.1 wt%) are Fo85-89.3. The lowest P concentrations are consistent with equilibrium with liquid parental to Gl, but the higher concentrations are not. Li concentrations, zoned from 3.84 to 4.90 ppm (core-rim), indicate equilibrium incorporation during crystal growth from a small, evolving melt pool and preservation of this rapidly relaxing gradient. REEs are mostly consistent with equilibrium growth from liquids evolving towards the observed LREE-enriched glass. Most of the clinopyroxenes are diopsides with some augites. Apatite inclusions occur in the rim of P-rich Fo85 and in An54. In Ki-5-301, a dark-coloured area of irregular shape (~200 ?m wide) is present along the contact between lherzolite and orthopyroxenite, consisting of Ol+Pl+Gl+Cpx+Spl+Ilm+Ap. It resembles a tabular dyke but is connected to melt-patches infiltrating the host rock. Widespread Glass in the layer has variable composition with two populations not related by fractional crystallization: 1) P2O5 1.02-1.09 wt% and 2) P2O51.62-2.35 wt% (a Gl inclusion in Ol has P2O5 3.57 wt% may have captured melt from the P-rich boundary layer at the interface with the rapidly growing olivine). REEs cluster in the same two groups. Li is as low as 3.66 ppm group 1 and 3-4× higher (9.64-13.3 ppm) in group 2. Olivine occurs as small idiomorphic crystals embedded in Gl and as large (~100 ?m) idiomorphic to hypidiomorphic crystals with Gl and Spl inclusions; Mg# ranges from Fo74.5 (rim in contact with Gl) to Fo90.3; P2O5 reaches 3.5 wt% (in a ~Fo84 rim); Li varies from 2.80 (core) to 6.35 ppm (rim). Clinopyroxene (Wo41-43En50-54Fs5-8; P2O5 0.04-0.08 wt%; Li 3.33 ppm) is found both within the ML and as a reaction product between melt and matrix Opx. Trace element geochemistry shows possible equilibrium with ML glass for some elements, but clear disequilibrium for others. Apatite occurs as large (~100 ?m) crystals in contact with Ol or Gl, as near-rim inclusions in P-rich Fo84 and as tiny prismatic crystals in Gl; REEs show slight negative Eu anomalies (Eu/Eu*=0.79-0.86) due to prior crystallization of plagioclase. High-resolution X-ray mapping of P in Ol from Ci-1-196 reveals 3-7 ?m wide P-rich bands parallel to facets. P2O5 correlates negatively with Si and Mg+Fe+Ca, suggesting a substitution Mg2SiO4 + 1 /2 P2O5 ?Mg1.5[]0.5PO4 + 1 /2MgO+SiO2. P-Al-rich areas may grow in minutes, whereas P-Al-poor over few weeks (Jambon et al., 1992). At such rates, dendritic growth (Welsch et al., 2014) implies that core to rim zoning may not be simple growth stratigraphy. A slight correlation between P and Al in our data implies either diffusive relaxation of Al gradients or, judging by dynamic experiments (Grant & Kohn, 2013), cooling rates >10° C/h that generate disequilibrium solute trapping of P but near-equilibrium incorporation of Al. The petrogenetic history following melt intrusion requires rapid cooling and reaction with matrix minerals and crystallization sequence Ol?Cpx?Pl?Ap?Fe-Ox?quench of Gl. P and Li concentrations set upper and lower limits on growth rates after intrusion of melt into CVF xenoliths. Early-crystallized olivine grew rapidly enough that sluggish P became over-enriched but not so fast as to over-enrich other elements. Cpx formed later either as neoblasts or reaction rims in which P was homogeneous (Baziotis et al. 2014) and growth was slower compared to Ol but fast enough

  7. Lunar Sample Compendium C Meyer 2012

    E-print Network

    Rathbun, Julie A.

    .9 (c ) U ppm 0.65 (b) 0.54 (c ) technique: (a) emp, (b) RNAA, (c ) INAA Morris R.V., See T.H. and Horz 0.4 0.26 (d) K2O 0.1 0.08 (d) P2O5 S % sum Sc ppm 6.77 (c ) V Cr 745 (c ) Co 43 (c ) Ni 532 (b) 566.H. and Hörz F. (1979c) Petrography and composition of large lunar glass objects. In Paper Presented

  8. Solar Physics Topics in High School: Analysis of a Course with Practical Activities at Dietrich Schiel Observatory. (Spanish Title: Temas de Física Solar Para Estudiantes de Escuelas Secundarias: un Análisis de un Curso con Enfoque Práctico en el Observatorio Dietrich Schiel.) Tópicos de Física Solar no Ensino Médio: Análise de um Curso com Atividades Práticas no Observatório Dietrich Schiel

    NASA Astrophysics Data System (ADS)

    Calbo Aroca, Silvia; Donizete Colombo, Pedro, Jr.; Celestino Silva, Cibelle

    2012-12-01

    This work analyses results obtained in a solar physics course for high school students promoted at the Dietrich Schiel Observatory of the University of São Paulo (USP). The course was elaborated by the authors with the intention of investigating student's concepts about the Sun, teaching topics of modern physics related to the Sun and providing students with knowledge about our star as well. The methodology of data gathering consisted of audio and video records of classes and of semi-structured interviews, and analysis of answers to written questionnaires. The results showed that most high school students conceived the Sun as made of fire, while sunspots were thought to be holes in the Sun. Even though some students did know that a spectrum is formed using a prism or diffraction grating, most of them ignored the nature of the observed spectral lines. Through the course, this topic was developed by means of a practical approach with solar and lamp spectra observations. The results obtained in the course point to the importance of science centers as partners in formal education. In this specific case, the Solar Room at the Dietrich Schiel Observatory is as a favorable environment for teaching modern physics in high school. Este artículo analiza los resultados obtenidos en un curso sobre la física solar, auspiciado por el Observatorio Dietrich Schiel de la USP para estudiantes de las escuelas secundarias. El curso fue diseñado por los autores con la intención de investigar las concepciones sobre el sol, enseñar temas relacionados con la física moderna del Sol y conocimientos generales sobre el astro rey. La metodología utilizada para la recolección de datos consistió en grabar, en audio y video, las clases, las entrevistas semi-estructuradas y las respuestas a los cuestionarios escritos. Los resultados mostraron que la mayoría de los participantes conciben el Sol como constituido por fuego y las manchas solares en la superficie solar como agujeros. Aunque algunos estudiantes sabían que un espectro puede estar formado por un prisma o red de difracción, la mayor parte de ellos desconocía la naturaleza de las líneas espectrales. A lo largo del curso, esta cuestión fue trabajada con un enfoque práctico mediante la observación del espectro solar y de las lámparas durante clases expositivas/dialogadas. Los resultados obtenidos en el curso mustran la importancia de los centros de ciencia como un apoyo en la educación formal. En este caso en particular, la Sala Solar del Observatorio Dietrich Schiel se destaca como un entorno favorable para la enseñanza de la física moderna en la escuela secundaria. Este trabalho analisa resultados obtidos em um curso sobre física solar para alunos do ensino médio promovido pelo Observatório Dietrich Schiel da USP. O curso foi elaborado pelos autores com a intenção de investigar concepções sobre o Sol, ensinar tópicos de física moderna relacionados ao Sol e conhecimentos gerais sobre o astro rei. A metodologia de coleta de dados consistiu em gravação em áudio e vídeo das aulas e das entrevistas semi-estruturadas, e respostas a questionários escritos. Os resultados mostraram que a maioria dos participantes concebeu o Sol como constituído por fogo e as manchas solares como buracos na superfície solar. Embora alguns alunos soubessem que um espectro pode ser formado por um prisma ou rede de difração, a maior parte deles desconhecia a natureza das linhas espectrais. Ao longo do curso, este tema foi trabalhado com uma abordagem prática com observação do espectro solar e de lâmpadas e em aulas expositivo-dialogadas. Os resultados obtidos no curso apontam para a importância dos centros de ciências como parceiros da educação formal. Neste caso específico, a Sala Solar do Observatório Dietrich Schiel é um ambiente propício para o ensino de física moderna no ensino médio.

  9. Neutron Assay System for Con?nement Vessel Disposition

    SciTech Connect

    Frame, Katherine C.; Bourne, Mark M.; Crooks, William J.; Evans, Louise; Mayo, Douglas R.; Miko, David K.; Salazar, William R.; Stange, Sy; Valdez, Jose I.; Vigil, Georgiana M.

    2012-07-13

    Waste will be removed from confinement vessels remaining from 1970s-era experiments. Los Alamos has 9+ spherical confinement vessels remaining from experiments. Each vessel contains {approx} 500 lbs of radioactive debris such as actinide metals and oxides, metals, powdered silica, graphite, and wires and hardware. In order to dispose of the vessels, debris and contamination must be removed. Neutron assay system was designed to assay vessels before and after cleanout. System requirements are: (1) Modular and moveable; (2) Capable of detecting {approx}100g {sup 239}Pu equivalent in a 2-inch thick steel sphere with 6 foot diameter; and (3) Capable of safeguards-quality assays. Initial design parameters arethe use of 4-atm {sup 3}He tubes with length of 6 feet, and {sup 3}He tubes embedded in polyethelene for moderation. This paper describes the calibration of the Confinement Vessel Assay System (CVAS) and quantification of its uncertainties. Assay uncertainty depends on five factors: (1) Statistical uncertainty in the assay measurement; (2) Statistical uncertainty in the background measurement; (3) Statistical uncertainty in the isotopics determination - This should be much smaller than the other uncertainties; (4) Systematic uncertainty due to position bias; and (5) Systematic uncertainty due to fluctuations in cosmic ray spallation. This one can be virtually eliminated by performing the background measurement with an empty vessel - but that may not be possible. We used modeling and experiments to quantify the systematic uncertainties. The calibration assumes a uniform distribution of material, but reality will be different. MCNPX modeling was used to quantify the positional bias. The model was benchmarked to build confidence in its results. Material at top of vessel is 44% greater than amount assayed, according to singles. Material near 19-tube detector is 38% less than amount assayed, according to singles. Cosmic ray spallation contributes significantly to the background. Comparing rates with and without a vessel showed that spallation adds an average of 27.27 singles/s and 5.45 doubles/s to background. Errors in the background rates were estimated at 20%.

  10. 9 CFR 319.300 - Chili con carne.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ...Mechanically Separated (Species) may be used in accordance with § 319.6. Head meat, cheek meat, and heart meat exclusive of the heart cap may be used to the extent of 25 percent of the meat ingredients under specific declaration on the...

  11. 9 CFR 319.301 - Chili con carne with beans.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ...Mechanically Separated (Species) may be used in accordance with § 319.6. Head meat, cheek meat, or heart meat exclusive of the heart cap may be used to the extent of 25 percent of the meat ingredients, and its presence shall be...

  12. 9 CFR 319.300 - Chili con carne.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ...Mechanically Separated (Species) may be used in accordance with § 319.6. Head meat, cheek meat, and heart meat exclusive of the heart cap may be used to the extent of 25 percent of the meat ingredients under specific declaration on the...

  13. Numerical Noise: The Pros and Cons of Filters, Diffusion and

    E-print Network

    Jablonowski, Christiane

    Equations: diabatic effects + Conservation laws for liquid water + ice #12;· Diffusion applied-filter · a posteriori Fixers: ­ Mass ­ Energy #12;The 3D Primitive Equations: diabatic effects ! "p "z = #g$ Horizontal Thermodynamic equation: ! D" Dt = #" #t + ( r v r $)" = 1 cp p0 p % & ' ( ) * Rd / cp Q Q: diabatic heating

  14. Arte y diccionario : con otras obras, en lengua michuacana 

    E-print Network

    Lagunas, Juan Baptista de, 16th cent Arte y diccionario : con otras obras, en lengua michuacana  Lagunas, Juan Baptista de, 16th cent. Measured Energy Use Indices for 27 Office Buildings  Haberl, J. S.; Sreshthaputra, A.; Claridge, D. E.; Turner, W. D.; Harmon, K.; Kisselburgh, J.; Mase, R.

    2001-01-01

    buildings, based on an analysis developed for ASHRAE research project 1093-RP that uses a quartile analysis (Abushakra et al. 1999; Abushakra et al. 2000). The 1093-RP daytyping procedure calculates 10th, 25th, 50th, 75th, and 90th percentiles for each hour... Shapes for Electricity Use In the calculations of the diversity factors in 1093-RP the 50th percentile values for each hour of the day are the diversity factors values of the lighting and receptacles loads to be used for the energy calculations of office...

  15. Cusp singularities in f(R) gravity: pros and cons

    NASA Astrophysics Data System (ADS)

    Chen, Pisin; Yeom, Dong-han

    2015-10-01

    We investigate cusp singularities in f(R) gravity, especially for Starobinsky and Hu-Sawicki dark energy models. We illustrate that, by using double-null numerical simulations, a cusp singularity can be triggered by gravitational collapses. This singularity can be cured by adding a quadratic term, but this causes a Ricci scalar bump that can be observed by an observer outside the event horizon. Comparing with cosmological parameters, it seems that it would be difficult to see super-Planckian effects by astrophysical experiments. On the other hand, at once there exists a cusp singularity, it can be a mechanism to realize a horizon scale curvature singularity that can be interpreted by a firewall.

  16. Analysis of commonality con ict in func-tionality architecture

    E-print Network

    Perry, Dewayne E.

    Asset Re-engineering Products ; Product Line Asset discovery Asset synthesis and evolution Continuous re-engineering Process, Product Line Relationship Process Line directed processes Mechanisms for Product Line constraints and Coordination The utility of these comes from specialization. #12;Session 8: Product Line Implications

  17. El cáncer entre las minorías con VIH y sida

    Cancer.gov

    Cancer and HIV/AIDS has always been “a tale of two diseases,” according to researchers at the NCI. Infection with HIV not only weakens the immune system, leading to AIDS and increasing the risk of opportunistic infections, but also increases the risk of several types of cancer. This Spanish-language Lifelines articles explains how HIV/AIDS affects cancer risk.

  18. Astronomia solare e ottica con il foro stenopeico

    NASA Astrophysics Data System (ADS)

    Sigismondi, Costantino

    The observation of the Sun with pinholes was started in Florence's Cathedral in 1475, and in Ulugh Beg observatory in Samarcand in 1424-29, well before the invention of the telescope, for measuring the solar position and the variation of the obliquity of the Earth's axis. Later, with Kepler, pinholes' telescopes were used to follow the solar spots when the telescopes made by Galileo were not available. The use of pinholes in positional solar astrometry continued successfully up to 1800 in some great Italian and French Churches. Nowadays by using pinholes it is possible to show the principles of positional astronomy and imaging to students with instruments very easy to be built at almost no cost. The concepts of focal length, best focus, angular resolution, atmospheric seeing and atmospheric transmittance can be verified with such simple devices. Such pinhole telescopes have been built by primary-school students at the Astronomical Observatory dedicated to the Pope astronomer Sylvester II, located in Bukowiec, Poland, which is at its third year of activity. The largest solar spots have been observed clearly with these instruments, demonstrating the principles discussed in this presentation. The light cast by one of this devices with 70 m of focal length and 1 cm of diameter has permitted to repeat the experiences on the diffraction of the light, made in 1648 by the Jesuits Riccioli and Grimaldi.

  19. Pros and Cons of Paper and Electronic Surveys

    ERIC Educational Resources Information Center

    Porter, Stephen R.

    2004-01-01

    This chapter describes the different types of paper and electronic surveys currently available and their costs and benefits in terms of equipment and printing costs, demands on staff time, and ease of use.

  20. A (Con)text for New Discourse as Semiotic Praxis

    ERIC Educational Resources Information Center

    Fulkova, Marie; Tipton, Teresa M.

    2008-01-01

    Contemporary art requires that art and cultural educators reposition encounters with artefacts, images and performances into a context for new discourses. Whereas digital media and other aspects of visual popular culture predominate the frames of reference of school-age children, their context (codes) of reference, in large part, do not contain…