Sample records for p2o5 modificados con

  1. Flexural strength and translucent characteristics of lithium disilicate glass–ceramics with different P 2O 5 content

    Microsoft Academic Search

    Fu Wang; Jing Gao; Hui Wang; Ji-hua Chen

    2010-01-01

    Lithium disilicate glass–ceramics derived from the SiO2–Li2O–K2O–Al2O3–ZrO2–P2O5 system with different P2O5 content (from 0.5mol.% to 2.0mol.% at a step of 0.5mol.%) were prepared for dental restorative application. Flexural strength of final glass–ceramics and translucent characteristics expressed in term of contrast ratio (CR) were measured. The interrelations between P2O5 content, microstructure and properties were discussed. Glass–ceramic with a P2O5 content of

  2. 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.

  3. Compressibility of P2O5-Al2O3-Na2SiO3 melts

    NASA Astrophysics Data System (ADS)

    Webb, Sharon; Courtial, Philippe

    1996-04-01

    The effect of composition and temperature on the relaxed adiabatic bulk modulus of melts in the P2O5-Al2O 3-Na2SiO3 system have been investigated in the temperature range of 1140 to 1450 °C using ultrasonic interferometric methods at frequencies of 3, 5 and 7 MHz. The density of these melts was determined using Pt-double-bob Archimedean densitometry techiques. P2O5 is known to dramatically affect the structure and the chemical and physical properties of granitic and pegmatitic melts as a function of the peralkalinity of the melt. The physical results of the structural changes occurring in Na2O-Al2O3-SiO2 melt upon the addition of P2O5 are observed by variations in the properties such as density and compressibility. For the present peralkaline melts, the bulk modulus and density decrease with addition of 15 mol% P2O5, and increase with the addition of 15 mol% Al2O3. The addition of P2O5 to the present melts results in a larger increase in melt compressibility than that observed with increasing polymerization between Na2SiO3 and Na2Si2O5 melts. This would suggest that not only is the polymerization of the melt increasing with the addition of P2O5 (Mysen et al. 1981; Nelson and Tallant 1984; Gan and Hess 1992), but that the tetrahedrally co-ordinated phosphorus complexes are influencing the bond lengths and energies within the melt structure; resulting in the structure becoming more compressible than expected, although incompressible (Vaughan and Weidner 1987) tetrahedral P2O5 polyhedra (Mysen et al. 1981; Gan and Hess 1992; Toplis et al. 1994) are being added to the melt structure.

  4. 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

  5. The effect of P 2O 5 on the crystallization and microstructure of glass-ceramics in the SiO 2–Li 2O–K 2O–ZnO–P 2O 5 system

    Microsoft Academic Search

    Sascha Cramer von Clausbruch; Marcel Schweiger; Wolfram Höland; Volker Rheinberger

    2000-01-01

    Six glasses in the SiO2–Li2O–K2O–ZnO–P2O5 system were prepared, varying the P2O5 content from 0.0 to 2.5 mol% with the molar ratios of the other components being invariant. Crystallization processes of these glasses were investigated using high temperature XRD and differential scanning calorimetry. Morphology and microstructure of the glass-ceramics were studied using scanning electron microscopy. Crystallization of these glasses occurred in

  6. Effects of P 2O 5 and sintering temperature on microstructure and mechanical properties of lithium disilicate glass-ceramics

    Microsoft Academic Search

    G. Wen; X. Zheng; L. Song

    2007-01-01

    This paper investigates the effect of P2O5 content and sintering temperature on the microstructure of lithium disilicate glass-ceramics and analyzes the relation between microstructure and mechanical properties. Specimens were prepared by hot-pressing technology, adding 1.0–4.0mol% P2O5 (G1P, G2P, G3P and G4P). Lithium disilicate (Li2Si2O5), lithium metasilicate (Li2SiO3) and lithium orthophosphate (Li3PO4) crystalline phases were detected. The morphology of Li2Si2O5 crystals

  7. Hexagonally ordered mesoporous ternary Li2O-TiO2-P2O5 oxides with high lithium content.

    PubMed

    Li, Donglin; Zhou, Haoshen; Honma, Itaru; Ichihara, Masaki

    2005-11-01

    Hexagonally ordered mesoporous Li2O-TiO2-P2O5 oxides with high lithium content have been synthesized using surfactant-templated self-assembly; this ternary oxide has been specifically designed to yield a variety of mesoporous frameworks including a nanocomposite, amorphous multicomponent oxide, and almost fully nanocrystalline anatase. PMID:16228030

  8. 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.

  9. Effect of P 2O 5 content in two series of soda lime phosphosilicate glasses on structure and properties – Part II: Physical properties

    Microsoft Academic Search

    M. D. O’Donnell; S. J. Watts; R. V. Law; R. G. Hill

    2008-01-01

    The effect of the variation in phosphate (P2O5) content on the properties of two series of bioactive glasses in the quaternary system SiO2–Na2O–CaO–P2O5 was studied. The first series (I) was a simple substitution of P2O5 for SiO2 keeping the Na2O:CaO ratio fixed (1:0.87). The second series (II) was designed to ensure charge neutrality in the orthophosphate (PO43-), therefore as P2O5

  10. Silver particles in glasses of the `Ag 2O–ZnO–P 2O 5' system

    Microsoft Academic Search

    Ilias Belharouak; François Weill; Claude Parent; Gilles Le Flem; Bernard Moine

    2001-01-01

    Silver particles of several sizes can be dispersed in glasses of the `Ag2O–ZnO–P2O5' system. By introducing a small proportion of SiO2 or Al2O3 micron-sized silver particles are obtained in low silver content glass compositions whereas nanometer-sized particles precipitate in silver rich glasses. The particle-glass composites exhibit the classical absorption plasmon band peaking about 430 nm. The thermal variation of the

  11. Silver aggregates in photoluminescent phosphate glasses of the `Ag 2O–ZnO–P 2O 5' system

    Microsoft Academic Search

    I. Belharouak; C Parent; B Tanguy; G Le Flem; M Couzi

    1999-01-01

    Photoluminescent properties of glasses of the Ag2O–ZnO–P2O5 system are reported. The compositions of the glasses are limited by the polyphosphate and diphosphate domain of this system. The phosphate structural units of the network former are deduced from Raman spectra. A comparison with the luminescent properties of crystallized silver phosphates of similar composition allows identification of two different emitting centers: isolated

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

    PubMed

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

    2014-09-01

    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

  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

    Microsoft Academic Search

    Irena Szczygiel; Teresa Znamierowska; Dagmara Mizer

    2010-01-01

    A phase equilibria diagram of the partial system NdPO4–K3PO4–KPO3 has been developed as part of the research aimed at determining the phase equilibrium relationships in the oxide system Nd2O3–K2O–P2O5. The investigations were conducted using thermoanalytical techniques, X-ray powder diffraction analysis and reflected-light microscopy. Three isopleths existing between: K3Nd(PO4)2–K4P2O7, NdPO4–K5P3O10 and NdPO4–K4P2O7 have been identified in the partial NdPO4–K3PO4–KPO3 system. Previously

  15. Effects of the substitution of P2O5 by B2O3 on the structure and dielectric properties in (90-x) P2O5-xB2O3-10Fe2O3 glasses.

    PubMed

    Sdiri, N; Elhouichet, H; Dhaou, H; Mokhtar, F

    2014-01-01

    90%[xB2O3 (1-x) P2O5] 10%Fe2O3, glass systems where (x=0 mol%, 5 mol%, 10 mol%, 15 mol%, 20 mol%) was prepared via a melt quenching technique. The structure of glass is investigated at room temperature by, Raman and EPR spectroscopy. Raman studies have been performed on these glasses to examine the distribution of different borate and phosphate structural groups. We have noted an increase from 3 to 4 in the coordination number of the boron atoms from 3 to 4, i.e., the conversion of the BO3 triangular structural units into BO4 tetrahedra. The samples have been investigated by means of electron paramagnetic resonance (EPR). The results obtained from the gef=4.28 EPR line are typical of the occurrence of iron (III) occupying substitutional sites. Moreover, the dielectric sizes such as ?'(?), ??(?), imaginary parts of the electrical modulus, M(*)(?) and the loss tan?, their variation with frequency at room temperature show a decrease in relaxation intensity with an increase in the concentration of (B2O3). On the present work, we have found a weak extinction index with our new glass. PMID:23995605

  16. Effects of the substitution of P2O5 by B2O3 on the structure and dielectric properties in (90-x) P2O5-xB2O3-10Fe2O3 glasses

    NASA Astrophysics Data System (ADS)

    Sdiri, N.; Elhouichet, H.; Dhaou, H.; Mokhtar, F.

    2014-01-01

    90%[xB2O3 (1-x) P2O5] 10%Fe2O3, glass systems where (x = 0 mol%, 5 mol%, 10 mol%, 15 mol%, 20 mol%) was prepared via a melt quenching technique. The structure of glass is investigated at room temperature by, Raman and EPR spectroscopy. Raman studies have been performed on these glasses to examine the distribution of different borate and phosphate structural groups. We have noted an increase from 3 to 4 in the coordination number of the boron atoms from 3 to 4, i.e., the conversion of the BO3 triangular structural units into BO4 tetrahedra. The samples have been investigated by means of electron paramagnetic resonance (EPR). The results obtained from the gef = 4.28 EPR line are typical of the occurrence of iron (III) occupying substitutional sites. Moreover, the dielectric sizes such as ??(?), ??(?), imaginary parts of the electrical modulus, M*(?) and the loss tan ?, their variation with frequency at room temperature show a decrease in relaxation intensity with an increase in the concentration of (B2O3). On the present work, we have found a weak extinction index with our new glass.

  17. Structural and thermal properties of La2O3sbnd Fe2O3sbnd P2O5 glasses

    NASA Astrophysics Data System (ADS)

    Qian, Bin; Yang, Shiyuan; Liang, Xiaofeng; Lai, Yuanming; Gao, Long; Yin, Guangfu

    2012-03-01

    The structural properties of xLa2O3sbnd (40 - x)Fe2O3sbnd 60P2O5(x = 0, 2, 4, 6, 8, 10 mol%) glasses have been investigated by Fourier transform infrared spectrum (FTIR), X-ray diffraction (XRD) and differential scanning calorimetry (DSC). The FTIR spectra show that the replacement of up to 6 mol% Fe2O3 by La2O3 does not produce any fundamental change in the glass structure, which consists predominantly of pyrophosphate, Q1 units. XRD analysis has confirmed that the majority of samples are X-ray amorphous, and crystallization occurs when the sample containing 8 mol% La2O3, the crystalline phase is LaPO4. The XRD analysis indicates that the solubility of lanthanum oxide in these iron phosphate melts is less than 8 mol%. Glass transition temperature (Tg) and (Tr - Tg) increase as the lanthanum content of the glass is increased. This result suggests that the glass network is strengthening and the thermal stability is improved with the addition of La2O3.

  18. Cl, P2O5, U and Br associated with mineral separates from a low and a high Ti mare basalt

    NASA Technical Reports Server (NTRS)

    Jovanovic, S.; Reed, G. W., Jr.

    1980-01-01

    Low Ti basalt 12040 and high Ti basalt 75055 have approximately the same Cl/P2O5 ratio; the Cl is that remaining after a hot water leach. Pyroxene, plagioclase and ilmenite minerals separated from the basalts also tend to have this same Cl/P2O5 ratio. This is evidence that these major minerals do not control the ratio since Cl and P would not be expected to partition to the same extent into each mineral. Olivine appears to be a special case. It is proposed that the grains measured contained inclusions with leachable and P2O5-related Cl. Dilute acid leaches of whole rock and separated minerals have the same or nearly the same Cl/P2O5 ratios as the residual samples. Apatite and whitlockite were probably the phases leached. They must be constituents of the mesostasis and are present as microminerals or coatings on major mineral grains. The acid leach results imply little or no partition of Cl and P2O5 into major minerals.

  19. Electrical and electrochemical properties of the 70Li 2S·(30 ? x)P 2S 5· xP 2O 5 glass-ceramic electrolytes

    Microsoft Academic Search

    Keiichi Minami; Akitoshi Hayashi; Masahiro Tatsumisago

    2008-01-01

    The electrical and electrochemical properties of the 70Li2S·(30?x)P2S5·xP2O5 glass-ceramics were investigated. The glass-ceramics with up to 5 mol% of P2O5 kept high conductivity over 10?3 S cm?1. The 70Li2S·27P2S5·3P2O5 glass-ceramic exhibited the highest conductivity of 3.0×10?3 S cm?1 at room temperature and the lowest activation energy of 16 kJ mol?1 for conduction. Electrochemical stability of the glass-ceramic was improved by substituting 3 mol%

  20. Structure and properties of the 70Li 2S · (30 ? x)P 2S 5 · xP 2O 5 oxysulfide glasses and glass–ceramics

    Microsoft Academic Search

    Keiichi Minami; Fuminori Mizuno; Akitoshi Hayashi; Masahiro Tatsumisago

    2008-01-01

    The 70Li2S·(30?x)P2S5·xP2O5 (mol%) oxysulfide glasses were prepared by the melt quenching method. The glasses were prepared in the composition range 0?x ?10. The glass–ceramics were prepared by heating the glasses over crystallization temperatures. The POnS3?n (n=1–3) oxysulfide units were produced in the glasses and glass–ceramics by partial substituting P2O5 for P2S5. In particular, the P2OS64? unit would be produced by

  1. Low temperature biosynthesis of Li2O-MgO-P2O5-TiO2 nanocrystalline glass with mesoporous structure exhibiting fast lithium ion conduction.

    PubMed

    Du, Xiaoyong; He, Wen; Zhang, Xudong; Ma, Jinyun; Wang, Chonghai; Li, Chuanshan; Yue, Yuanzheng

    2013-04-01

    We demonstrate a biomimetic synthesis methodology that allows us to create Li2O-MgO-P2O5-TiO2 nanocrystalline glass with mesoporous structure at lower temperature. We design a 'nanocrystal-glass' configuration to build a nanoarchitecture by means of yeast cell templates self-assembly followed by the controlled in-situ biomineralization of materials on the cell wall. Electrochemically active nanocrystals are used as the lamellar building blocks of mesopores, and the semiconductive glass phase can act both as the 'glue' between nanocrystals and functionalized component. The Li2O-MgO-P2O5-TiO2 nanocrystalline glass exhibits outstanding thermal stability, high conductivity and wide potential window. This approach could be applied to many other multicomponent glass-ceramics to fabricate mesoporous conducting materials for solid-state lithium batteries. PMID:23827612

  2. Radiation-induced color centers in ?-irradiated glasses in the Na 2 O-Nb 2 O 5 -P 2 O 5 system

    Microsoft Academic Search

    E. V. Avdeeva; T. V. Bocharova; G. O. Karapetyan; A. M. Mironov

    2006-01-01

    The specific features of the induced optical absorption spectra of glasses in the 45Na2O xNb2O5 (55 ? x)P2O5 system with Nb2O5 contents x = 5, 10, 20, 25, 30, and 35 mol % are investigated as functions of the irradiation dose and the heat treatment time. The\\u000a spectra are decomposed into Gaussian components with the use of computer processing. It

  3. Spectral analysis of RE 3+ (RE = Sm, Dy, and Tm): P 2O 5–Al 2O 3–Na 2O glasses

    Microsoft Academic Search

    G. Lakshminarayana; Rong Yang; Mengfei Mao; Jianrong Qiu

    2009-01-01

    Phosphate glasses in the compositions of 70P2O5–15Al2O3–14Na2O–1RE3+ (RE=Sm, Dy, and Tm) (mol%) were prepared by melt-quenching technique and characterized optically. The differential thermal analysis (DTA) profile of the host glass was carried out to confirm its thermal stability. For all the glasses absorption, photoluminescence and decay measurements have also been carried out. These glasses have shown strong emission and absorption

  4. Induced crystallization and physical properties of Li 2O–CaF 2–P 2O 5:TiO 2 glass system

    Microsoft Academic Search

    G. Murali Krishna; N. Veeraiah; N. Venkatramaiah; R. Venkatesan

    2008-01-01

    Li2O–CaF2–P2O5 glasses mixed with different concentrations of TiO2 (ranging from 0 to 0.8mol%) were crystallized at 500°C. The samples are characterized by X-ray diffraction, scanning electron microscopy and differential thermal analysis techniques. Spectroscopic properties (IR and Raman) and elastic properties (viz., Young's modulus E, shear modulus G and micro-hardness H) at room temperature are studied. The X-ray diffraction and the

  5. Effect of hydroxyl bonds on persistent spectral hole burning in Eu3+-doped BaO-P2O5 glasses

    Microsoft Academic Search

    Masayuki Nogami; Naoto Umehara; Tomokatsu Hayakawa

    1998-01-01

    The effect of OH bonds on the optical absorption and persistent spectral hole burning (PSHB) properties was quantitatively analyzed in Eu3+-doped BaO-P2O5 glasses. Glasses were prepared by melting the raw material at 600-800 °C, in which the OH content was changed. The hole was burned in the 7F0-->5D0 transition of the Eu3+ ions at 6 K and the dependence of

  6. P2O5\\/Al2O3 as an Efficient Heterogeneous Catalyst for the Acetylation of Alcohols, Phenols, Thiols, and Amines Under Solvent-Free Conditions

    Microsoft Academic Search

    Amin Zarei; Abdol R. Hajipour; Leila Khazdooz

    2011-01-01

    A convenient, rapid, and efficient method for the acetylation of alcohols, phenols, thiols, and amines has been developed by using acetic anhydride in the presence of a catalytic amount of P2O5\\/Al2O3 under solvent-free conditions at room temperature. This reaction was studied under different conditions, and several solvents were examined for this conversion. However, in terms of reaction time and yield,

  7. Phosphorus Partition between Liquid Steel and CaO-SiO 2 -P 2 O 5 -MgO Slag Containing Low FeO

    Microsoft Academic Search

    Somnath Basu; Ashok Kumar Lahiri; Seshadri Seetharaman

    2007-01-01

    CaO-SiO2-FeO\\u000a x\\u000a -P2O5-MgO bearing slags are typical in the basic oxygen steelmaking (BOS) process. The partition ratio of phosphorus between slag\\u000a and steel is an index of the phosphorus holding capacity of the slag, which determines the phosphorus content achievable in\\u000a the finished steel. The influences of FeO concentration and basicity on the equilibrium phosphorus partition ratios were experimentally\\u000a determined

  8. Li2SO4-Li2O-P2O5 ionic glass dispersed with [Bmim] [PF6] ionic liquid: Electrical transport and thermal stability investigations

    NASA Astrophysics Data System (ADS)

    Rathore, Munesh; Dalvi, Anshuman; Kumar, Anil

    2014-04-01

    A fast ionic composite is prepared by dispersion of Ionic liquid [Bmim][PF6] in Li2SO4-Li2O-P2O5 glass matrix by mixing and through grinding. Amorphous/glassy nature of the samples is confirmed by X-Ray diffraction (XRD). Surprisingly, the electrical conductivity of the samples is found to be increasing by ˜ 2 orders of magnitude and exhibits typical Arrhenius behavior with low activation energy. DC polarization and impedance spectroscopy measurements suggest that samples are essentially ionic in nature. The conductivity isotherms were also obtained at different temperatures (T < 100 °C) and found to be appreciably stable at least for ˜ 10 days.

  9. Synthesis and Li + ion conductivity of Li 2O–Nb 2O 5–P 2O 5 glasses and glass–ceramics

    Microsoft Academic Search

    Toru Okada; Tsuyoshi Honma; Takayuki Komatsu

    2010-01-01

    Glasses with the compositions of xLi2O–(70?x)Nb2O5–30P2O5, x=30–60, and their glass–ceramics are synthesized using a conventional melt-quenching method and heat treatments in an electric furnace, and Li+ ion conductivities of glasses and glass–ceramics are examined to clarify whether the glasses and glass–ceramics prepared have a potential as Li+ conductive electrolytes or not. The electrical conductivity (?) of the glasses increases monotonously

  10. Fast Li + ion conducting glass-ceramics in the system Li 2O–Al 2O 3–GeO 2–P 2O 5

    Microsoft Academic Search

    Jie Fu

    1997-01-01

    Fast lithium ion conducting glass-ceramics were successfully prepared by heat-treatment of glasses in the system Li2O–Al2O3–GeO2–P2O5. The phase present in the glass-ceramics was LiGe2(PO4)3 in which Ge4+ ions were partially replaced by Al3+ ions. Composition dependence of conductivity showed that substitution of Al3+ ions for Ge4+ ions resulted in a considerable enhancement in conductivity and in a wide composition range

  11. Superionic conductivity of glass-ceramics in the system Li 2O? Al 2O 3?TiO 2?P 2O 5

    Microsoft Academic Search

    Jie Fu

    1997-01-01

    A Li2O?Al2O3?TiO2?P2O5 glass was prepared and converted into glass-ceramics through heat-treatment at 700–1000 °C for 12 h. X-ray analysis indicated that the resultant glass-ceramics were mainly composed of Li1 + xAlxTi2 ? x(PO4)3 phases. The lithium ion conductivity of the glass-ceramics increased with the growth of the Li1 + xAlxTi2 ? x(PO4)3 phase and a extremely high value, 1.3 ×

  12. Structural and microstructural transitions during phase separation and crystallization of Al 2 O 3 SiO 2 -P 2 O 5 -Y 2 O 3 glass

    Microsoft Academic Search

    Alenka Rozaj-Brvar; Robert F. Davis

    1983-01-01

    A highly refractory glass in the system Al2O3-SiO2-P2O5-Y2O3 has been designed and produced such that, upon heating, an essentially fully crystalline glass—ceramic evolves containing mullite (nominally 3Al2O3·2SiO2) and xenotime (YPO4) as the final principal phases. Phase separation in this glass occurred during cooling from the melt and continued during annealing. XPS of the Al 2p, P 2p and the Y

  13. Phase separation, crystallization and leaching of microporous glass ceramics in the CaO–TiO 2–P 2O 5 system

    Microsoft Academic Search

    M. Kord; V. K. Marghussian; B. Eftekhariyekta; A. Bahrami

    2009-01-01

    Microporous glass ceramics belonging to the CaO–TiO2–P2O5 system were prepared with the assumption of a 2:1 mole ratio for ?-Ca3(PO4)2:CaTi4(PO4)6, the anticipated crystalline phases in the end product. The glasses formulated according to the above composition were melted and cast onto a steel mold and were crystallized to glass ceramics containing the above phases. Dilatometric\\/differential thermal analysis (DTA) techniques were

  14. Structural investigation of MO ? P2O5? Li2O (MO = Fe2O3 or V2O5) glass systems by FTIR spectroscopy

    NASA Astrophysics Data System (ADS)

    Andronache, Constantin I.; Racolta, Dania

    2014-11-01

    Glasses from the systems xMO ?(100-x )[ P2O5? Li2O ] (MO = Fe2O3 or V2O5) with 0 ? x ? mol % were prepared in the same conditions and characterized by IR spectroscopy. It was established the mode in which both Fe2O3 and V2O5 influences the local structure of these glasses. The iron ions generally modify in a different way the local structure of these glasses then vanadium ions. The results shown that phosphate units are the main structural units of glass system and the iron and vanadium ions are located in the network.

  15. Study of optical band gap and FTIR spectroscopy of Li2O.Bi2O3.P2O5 glasses.

    PubMed

    Rani, S; Sanghi, S; Agarwal, A; Seth, V P

    2009-10-15

    Glasses having composition (25+x)Li(2)O.(65-x)P(2)O(5).10Bi(2)O(3) (0< or =x< or =25 mol%) were prepared by normal melt quenching technique. The optical absorption spectra of the polished samples were recorded in spectral range from 200 to 3300 nm at room temperature. The optical absorption edge (lambda(cutoff)), optical band gap (E(g)) and Urbach energy (DeltaE) were determined from the absorption spectra. Variation in these optical parameters has been associated with the structural changes occurring in these glasses with increase in Li(2)O:P(2)O(5) ratio. Variation in density (D), molar volume (V(M)) and glass transition temperature (T(g)) has also been correlated with structural changes in the glass samples. The FTIR spectra have been recorded in the spectral range from 400 to 1400 cm(-1). The FTIR spectra show the rapid depolymerization of phosphate chains with increase in Li(2)O content and P-O-Bi bonds are formed. PMID:19713150

  16. Phosphorus and boron speciation in K 2O-B 2O 3-SiO 2-P 2O 5 glasses

    NASA Astrophysics Data System (ADS)

    Gan, Hao; Hess, Paul C.; Kirkpatrick, R. James

    1994-11-01

    Raman, 11B and 31P MAS NMR spectra of yP2O5 · (1 - y) [(20 - x)% K2O · x% B2O3 · 80% SiO2] glasses ( y = 0 to 0.03 and x = 5 to 13) show that dimers (P 1) and chains (P 2) are the dominant structural units for phosphate species; six-member rings (3B and 3O) and SiOB(IV) bonds are the major bonding types for boron-bearing species. Some of the B(IV)'s in the silicate network may be in structural sites similar to danburite. The coordination of B is strongly controlled by P in the glasses. The relative proportion of B(IV) to total B decreases significantly after adding less than 3 mol% P 2O 5. Homogeneous equilibria are determined from the spectral data to generalize the observed structural changes for each group of glasses with a fixed K 2O /B 2O 3 ratio. The DELL and BRAY (1983) model for B coordination is partially revised to meet the new data of B speciation derived from 11B MAS NMR spectra.

  17. MAS-NMR investigations of the crystallization behaviour of lithium aluminum silicate (LAS) glasses containing P 2O 5 and TiO 2 nucleants

    Microsoft Academic Search

    A. Ananthanarayanan; G. P. Kothiyal; L. Montagne; B. Revel

    2010-01-01

    Lithium aluminum silicate (LAS) glass of composition (mol%) 20.4Li2O–4.0Al2O3–68.6SiO2–3.0K2O–2.6B2O3–0.5P2O5–0.9TiO2 was prepared by melt quenching. The glass was then nucleated and crystallized based on differential thermal analysis (DTA) data and was characterized by 29Si, 31P, 11B and 27Al MAS-NMR. XRD and 29Si NMR showed that lithium metasilicate (Li2SiO3) is the first phase to c form followed by cristobalite (SiO2) and lithium

  18. 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.

  19. On the synthesis, characterization and magnetic properties of two new phases discovered in the PbO-Fe2O3-P2O5 system

    NASA Astrophysics Data System (ADS)

    El Hafid, Hassan; Velázquez, Matias; Pérez, Olivier; El Jazouli, Abdelaziz; Pautrat, Alain; Decourt, Rodolphe; Véron, Emmanuel; Viraphong, Oudomsack; Delmas, Claude

    2013-06-01

    The PbFe3O(PO4)3 powder compound was studied by means of X-ray diffraction (XRD) from 300 to 6 K, electron-probe microanalysis (EPMA) coupled with wavelength dispersion spectroscopy (WDS), calorimetric (DSC and specific heat) and magnetic properties measurements. Magnetization, magnetic susceptibility and specific heat measurements carried out on PbFe3O(PO4)3 powders firmly establish a series of three ferromagnetic (FM)-like second order phase transitions spanned over the 32-8 K temperature range. Discrepancies between magnetization and specific heat data obtained in PbFe3O(PO4)3 powders and single crystals are highlighted. A first extraction of the critical exponents (?,?,?) was performed by ac magnetic susceptibility in both PbFe3O(PO4)3 powders and single crystals and the values were found to be consistent with mean-field theory. Further exploration of the PbO-Fe2O3-P2O5 system led to the discovery of a new langbeinite phase, Pb1.5Fe2(PO4)3, the crystal structure of which was solved by room temperature single crystal XRD (P213, Z=4, a=9.7831(2) Å). This phase does not undergo any structural phase transition down to 6 K nor any kind of long range ordering down to 2 K.

  20. 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.

  1. 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.

  2. Microstructure and properties of a composite system for dental applications composed of glass-ceramics in the SiO2–Li2O–ZrO2–P2O5 system and ZrO2-ceramic (TZP)

    Microsoft Academic Search

    M. Schweiger; M. Frank; S. Cramer Von Clausbruch; W. Höland; V. Rheinberger

    1999-01-01

    The objective of the study was to develop a biocompatible composite system which was composed of TZP-ceramic (tetragonal zirconia polycrystals, ZrO2 stabilized with 3 mol?% Y2O3) and two glass-ceramics of the SiO2–Li2O–ZrO2–P2O5 type. The metal-free composite system would satisfy the translucency, the biocompatibility and the strength requirements of dentistry. The two glass-ceramics of the SiO2–Li2O–ZrO2–P2O5 type with a content of

  3. Heat treatment of Na2O-CaO-P2O5-SiO2 bioactive glasses: densification processes and postsintering bioactivity.

    PubMed

    Sola, A; Bellucci, D; Raucci, M G; Zeppetelli, S; Ambrosio, L; Cannillo, V

    2012-02-01

    Because of their excellent bioactivity, bioactive glasses are increasingly diffused to produce biomedical devices for bone prostheses, to face the dysfunctions that may be caused by traumatic events, diseases, or even natural aging. However, several processing routes, such as the production of scaffolds or the deposition of coatings, include a thermal treatment to apply or sinter the glass. The exposure to high temperature may induce a devetrification phenomenon, altering the properties and, in particular, the bioactivity of the glass. The present contribution offers an overview of the thermal behavior and properties of two glasses belonging to the Na2O-CaO-P2O5-SiO2 system, to be compared to the standard 45S5 Bioglass(®). The basic goal is to understand the effect of both the original composition and the thermal treatment on the performance of the sintered glasses. The new glasses, the one (BG_Na) with a high content of Na2O, the other (BG_Ca) with a high content of CaO, were fully characterized and sintering tests were performed to define the most interesting firing cycles. The sintered samples, treated at 880°C and 800°C respectively, were investigated from a microstructural point of view and their mechanical properties were compared to those of the bulk (not sintered) glass counterparts. The effect of sintering was especially striking on the BG_Ca material, whose Vickers hardness increased from 598.9 ± 46.7 HV to 1053.4 ± 35.0 HV. The in vitro tests confirmed the ability of the glasses, both in bulk and sintered form, of generating a hydroxyapatite surface layer when immersed in a simulated body fluid. More accurate biological tests performed on the sintered glasses proved the high bioactivity of the CaO-rich composition even after a heat treatment. PMID:22052581

  4. Luminescence properties of Sm(3+)-doped P(2)O(5)-PbO-Nb(2)O(5) glass under high pressure.

    PubMed

    Praveena, R; Venkatramu, V; Babu, P; Jayasankar, C K; Tröster, Th; Sievers, W; Wortmann, G

    2009-01-21

    Samarium doped lead phosphate glass modified with niobium having a composition (in mol%) of 55P(2)O(5)+39.5PbO+5Nb(2)O(5)+0.5Sm(2)O(3) has been prepared by the conventional melt quenching technique. The emission spectra and the decay curves for the (4)G(5/2) level of Sm(3+) ions have been measured as a function of pressure up to 23.6 GPa at room temperature. A discontinuity in the observed shifts and crystal-field splittings as a function of pressure around 9-10 GPa suggests that a phase transition is taking place in the glass matrix. The [Formula: see text], (6)H(7/2) and (6)H(9/2) transitions are shifted towards the lower energy side with magnitudes of -7.1, -7.6 and -5.5 cm(-1) GPa(-1) up to 8.9 GPa (phase 1) and -5.6, -4.9 and -4.4 cm(-1) GPa(-1) beyond 10.3 GPa (phase 2), respectively. A much stronger increase in the splitting of the [Formula: see text] and [Formula: see text] Stark levels with pressure is observed in phase 1 than in phase 2. The lifetime of the (4)G(5/2) level decreases from 2.29 ms (0 GPa) to 0.64 ms (23.6 GPa) with pressure. The decay curves of the (4)G(5/2) level exhibit non-exponential behavior for all the pressures and were fitted by the generalized Yokota-Tanimoto model to probe the nature of the energy transfer process. The best fits with S = 6 indicate that the energy transfer between donor and acceptor is of dipole-dipole type. The crystal-field splitting experienced by the Sm(3+) ions in the title glass are found to be larger than those found in borate, K-Ba-Al phosphate and tellurite glasses. PMID:21817267

  5. Luminescence properties of Sm3+-doped P2O5-PbO-Nb2O5 glass under high pressure

    NASA Astrophysics Data System (ADS)

    Praveena, R.; Venkatramu, V.; Babu, P.; Jayasankar, C. K.; Tröster, Th; Sievers, W.; Wortmann, G.

    2009-01-01

    Samarium doped lead phosphate glass modified with niobium having a composition (in mol%) of 55P2O5+39.5PbO+5Nb2O5+0.5Sm2O3 has been prepared by the conventional melt quenching technique. The emission spectra and the decay curves for the 4G5/2 level of Sm3+ ions have been measured as a function of pressure up to 23.6 GPa at room temperature. A discontinuity in the observed shifts and crystal-field splittings as a function of pressure around 9-10 GPa suggests that a phase transition is taking place in the glass matrix. The \\mathrm {{}^{4}G_{5/2}} \\to \\mathrm {{}^{6}H_{5/2}} , 6H7/2 and 6H9/2 transitions are shifted towards the lower energy side with magnitudes of -7.1, -7.6 and -5.5 cm-1 GPa-1 up to 8.9 GPa (phase 1) and -5.6, -4.9 and -4.4 cm-1 GPa-1 beyond 10.3 GPa (phase 2), respectively. A much stronger increase in the splitting of the \\mathrm {{}^{4}G_{5/2}} \\to \\mathrm {{}^{6}H_{5/2}} and \\mathrm {{}^{4}G_{5/2}} \\to \\mathrm {{}^{6}H_{7/2}} Stark levels with pressure is observed in phase 1 than in phase 2. The lifetime of the 4G5/2 level decreases from 2.29 ms (0 GPa) to 0.64 ms (23.6 GPa) with pressure. The decay curves of the 4G5/2 level exhibit non-exponential behavior for all the pressures and were fitted by the generalized Yokota-Tanimoto model to probe the nature of the energy transfer process. The best fits with S = 6 indicate that the energy transfer between donor and acceptor is of dipole-dipole type. The crystal-field splitting experienced by the Sm3+ ions in the title glass are found to be larger than those found in borate, K-Ba-Al phosphate and tellurite glasses.

  6. Effect of heat treatment on the properties of SiO2-CaO-MgO-P 2O 5 bioactive glasses.

    PubMed

    Zhou, Yue; Li, Hongying; Lin, Kaili; Zhai, Wanying; Gu, Weiming; Chang, Jiang

    2012-09-01

    Since the invention of 45S5 Bioglass, researchers never stopped exploring new generation bioactive glass (BG) materials for wider applications in regenerative medicine, among which a novel SiO(2)-CaO-MgO-P(2)O(5) bioactive glass (BG20) is an excellent candidate. However, apart from their biocompatibility and bioactivity, a porous structure is also a must for a tissue engineering scaffold in successfully fixing bone defect. The porosity is the outcome of the high temperature (500-1,000 °C) treatment in the fabricating process of the bioglass scaffold. Under the high temperature, the amorphous glass material will become crystallized at certain percentage in the glass matrix, and possibly leading to consequent changes in the mechanical strength, biodegradability and bioactivity. To elucidate the effect of phase transition on the change of the properties of BG20, the experiments in this report were designed to fine-tuning the heat treating temperatures to fabricate a series of BG20 powders with different crystallization structures. X-ray diffraction revealed a positive correlation between the heating temperature and the crystallization, as well as the compressive strength of the materials. In vitro degradation and ion analysis by ICP-AES demonstrated a similar releasing behavior of different ions including Mg(2+), Ca(2+) and Si(4+), which in common is the tendency of decreasing of the ion concentration along with the increasing of the treating temperature. Cell proliferation assay using both mouse fibroblasts (NIH3T3) and bone marrow stromal cells (BMSCs) showed little toxicity of the ionic extract of the BG20 powders at all the treating temperatures, while fibroblasts demonstrated a significant promoting in the percentage of proliferation. Furthermore, reverse-transcription and polymerase chain reaction analysis on two representative marker genes for early osteogenesis and endochondral ossification, respectively, type I collagen alpha 1 and Indian Hedge-hog, showed an interesting induction of both genes over their basal levels by the treatment of the ionic extract of BG20, implying its important capability in regulating the fate of differentiation of the BMSCs as a novel biomaterial in bone tissue engineering. PMID:22699712

  7. Electrical and electrochemical properties of glass–ceramic electrolytes in the systems Li 2S–P 2S 5–P 2S 3 and Li 2S–P 2S 5–P 2O 5

    Microsoft Academic Search

    Keiichi Minami; Akitoshi Hayashi; Satoshi Ujiie; Masahiro Tatsumisago

    2011-01-01

    Electrical and electrochemical properties of the 70Li2S·(30?x)P2S5·xP2S3 and the 70Li2S·(30?x)P2S5·xP2O5 (mol%) glass–ceramics prepared by the mechanical milling technique were investigated. Glass–ceramics with 1mol% P2S3 and 3mol% P2O5 showed the highest conductivity of 5.4×10?3Scm?1 and 4.6×10?3Scm?1, respectively. Moreover, these glass–ceramics showed higher electrochemical stability than the 70Li2S·30P2S5 (mol%) glass–ceramic. From the XRD patterns of the obtained glass–ceramics, trivalent phosphorus and oxygen

  8. Characteristics and biocompatibility of Na 2O–K 2O–CaO–MgO–SrO–B 2O 3–P 2O 5 borophosphate glass fibers

    Microsoft Academic Search

    Kai Zheng; Shengbing Yang; Jiaojiao Wang; Christian R?ssel; Changsheng Liu; Wen Liang

    A novel Na2O–K2O–CaO–MgO–SrO–B2O3–P2O5 borophosphate glass fiber is prepared. The thermal properties including differential thermal analysis (DTA) and viscosity measurement of the glass were presented. The tensile strength of the glass fiber is measured. The reaction of the glass fibers in the SBF solution is characterized by XRD, FTIR and SEM. XRD and FTIR indicate that the carbonate hydroxyapatite has formed

  9. Features of the local structural disorder in Li 2O–CaF 2–P 2O 5 glass–ceramics with Cr 2O 3 as nucleating agent

    Microsoft Academic Search

    G. Murali Krishna; Y. Gandhi; N. Venkatramaiah; R. Venkatesan; N. Veeraiah

    2008-01-01

    Li2O–CaF2–P2O5 glasses mixed with different concentrations of Cr2O3 (ranging from 0 to 1.0mol%) were crystallized. The samples were characterized by X-ray diffraction, scanning electron microscopy, energy dispersive spectroscopy (EDS), differential thermal analysis and conventional spectroscopic techniques. The X-ray diffraction and scanning electron microscopic studies reveal the presence of lithium phosphate, calcium phosphate and chromium phosphate (complexes of Cr3+, Cr5+ and

  10. Role of CaO addition in the local order around Erbium in SiO2GeO2P2O5 fiber preforms F. d'Acapito C. Maurizio

    E-print Network

    Boyer, Edmond

    Role of CaO addition in the local order around Erbium in SiO2­GeO2­P2O5 fiber preforms F. d is drawn into a fiber. An effective method to study the incorporation of Er in a matrix is by Extended X and chemical composition of the environment of the element under study. The Er site has been successfully

  11. 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

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

    2014-11-01

    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

  12. Phosphorus Partition between Liquid Steel and CaO-SiO 2 -FeO x -P 2 O 5 -MgO Slag Containing 15 to 25 Pct FeO

    Microsoft Academic Search

    Somnath Basu; Ashok Kumar Lahiri; Seshadri Seetharaman

    2007-01-01

    CaO-SiO2-FeO\\u000a x\\u000a -P2O5-MgO bearing slags are typically used in the basic oxygen steelmaking (BOS) process. The partition ratio of phosphorus between\\u000a slag and steel is an index of the phosphorus holding capacity of the slag, which determines the phosphorus content achievable\\u000a in the finished steel. The influence of factors such as FeO content and basicity on the phosphorus partition ratio

  13. XPS and ionic conductivity studies on Li 2O–Al 2O 3–(TiO 2 or GeO 2)–P 2O 5 glass–ceramics

    Microsoft Academic Search

    B. V. R Chowdari; G. V Subba Rao; G. Y. H Lee

    2000-01-01

    Lithium ion conducting glass–ceramics composed of the crystalline conducting phase LiM2(PO4)3 (M=Ti and Ge) in which the M4+ ions are partially substituted by Al3+ ions (Li-analogue of NASICON) have been synthesized by heat-treatment of Li2O–Al2O3–MO2–P2O5 (M=Ti and Ge) glasses. The as-prepared and annealed glasses and glass–ceramics have been characterized by XRD, DSC, XPS and conductivity techniques. The glass transition temperature,

  14. Influence of lithium phosphate concentration and temperature on the electrical conduction of (76V 2O 5–24P 2O 5) 1? X (Li 3PO 4) X glasses

    Microsoft Academic Search

    N. M. Shash; F. E. Salman; M. K. El-Mansy; H. A. Ghodair

    2004-01-01

    Characterization of the (76V2O5–24P2O5)1?X (Li3PO5)X, where X=0.0,0.01,0.02,0.10 and 0.15, glass has been done using X-ray diffraction and differential thermal analysis (DTA). The dc conductivity of the glass samples was studied over a temperature range from 300 to 593 K. The temperature dependence of dc conductivity shows two regions. One at relatively high temperature range, above ?D\\/2, and the other at

  15. Structure, glass transition temperature and spectroscopic properties of 10Li2O-xP2O5-(89-x)TeO2-1CuO (5?x?25 mol%) glass system.

    PubMed

    Upender, G; Babu, J Chinna; Mouli, V Chandra

    2012-04-01

    X-ray diffraction (XRD), field emission scanning electron microscope (FESEM), energy dispersive X-ray spectrometry (EDS), differential scanning calorimetry (DSC), infrared (IR), Raman, electron paramagnetic resonance (EPR) and optical absorption studies on 10Li2O-xP2O5-(89-x)TeO2-1CuO glasses (where x=5, 10, 15, 20 and 25 mol%) have been carried out. The amorphous nature of the glasses was confirmed using XRD and FESEM measurements. The glass transition temperature (Tg) of glass samples have been estimated from DSC traces and found that the Tg increases with increasing P2O5 content. Both the IR and Raman studies have been showed that the present glass system consists of [TeO3], [TeO4], [PO3] and [PO4] units. The spin-Hamiltonian parameters such as g?, g?, and A? have been determined from EPR spectra and it was found that the Cu2+ ion is present in tetragonal distorted octahedral site with [Formula: see text] as the ground state. Bonding parameters and bonding symmetry of Cu2+ ions have been calculated by correlating EPR and optical data and were found to be composition dependent. PMID:22248455

  16. Structure, glass transition temperature and spectroscopic properties of 10Li2O-xP2O5-(89 - x)TeO2-1CuO (5 ? x ? 25 mol%) glass system

    NASA Astrophysics Data System (ADS)

    Upender, G.; Babu, J. Chinna; Mouli, V. Chandra

    2012-04-01

    X-ray diffraction (XRD), field emission scanning electron microscope (FESEM), energy dispersive X-ray spectrometry (EDS), differential scanning calorimetry (DSC), infrared (IR), Raman, electron paramagnetic resonance (EPR) and optical absorption studies on 10Li2O-xP2O5-(89 - x)TeO2-1CuO glasses (where x = 5, 10, 15, 20 and 25 mol%) have been carried out. The amorphous nature of the glasses was confirmed using XRD and FESEM measurements. The glass transition temperature (Tg) of glass samples have been estimated from DSC traces and found that the Tg increases with increasing P2O5 content. Both the IR and Raman studies have been showed that the present glass system consists of [TeO3], [TeO4], [PO3] and [PO4] units. The spin-Hamiltonian parameters such as g?, g?, and A? have been determined from EPR spectra and it was found that the Cu2+ ion is present in tetragonal distorted octahedral site with d as the ground state. Bonding parameters and bonding symmetry of Cu2+ ions have been calculated by correlating EPR and optical data and were found to be composition dependent.

  17. Influence of composition and surface characteristics on the in vitro bioactivity of SiO(2)-CaO-P(2)O(5)-MgO sol-gel glasses.

    PubMed

    Pérez-Pariente, J; Balas, F; Román, J; Salinas, A J; Vallet-Regí, M

    1999-11-01

    Glasses in the system SiO(2)-CaO-P(2)O(5)-MgO were prepared by the sol-gel method. These glasses featured SiO(2) contents in the range 60-80 mol %, 4 mol % of P(2)O(5), and a CaO/MgO molar ratio of 4. Because of their composition and surface properties, all the glasses showed in vitro bioactivity, as evidenced by the formation of an apatite-like layer on their surface when soaked in an acellular medium with ionic composition similar to human blood plasma. An increase in the CaO content of the glasses also caused an increase in their porosity. Higher porosity facilitated the apatite nucleation on the sample surface during the first days of the in vitro test. On the other hand, those glasses with higher SiO(2) content also showed higher surface area values, as well as higher calcium phosphate layer growth rates. For longer soaking periods, the grown layer was analyzed, revealing a two-phase composition: apatite and whitlockite. PMID:10449627

  18. Influence of aluminum ions on fluorescent spectra and upconversion in codoped CaF2-Al2O3-P2O5-SiO2:Ho3+ and Er3+ glass system

    NASA Astrophysics Data System (ADS)

    Gandhi, Y.; Rao, M. V. Ramachandra; Rao, Ch. Srinvasa; Srikumar, T.; Kityk, I. V.; Veeraiah, N.

    2010-07-01

    The glasses of the composition 20CaF2-xAl2O3-(59-x)P2O5-20SiO2:1.0Ho2O3/1.0Er2O3 and 20CaF2-xAl2O3-(59-x)P2O5-20SiO2:(0.6Ho2O3+0.4Er2O3) with x varying from 2 to 10 mol % have been synthesized. Optical absorption and fluorescence spectra (in the spectral range 350-2100 nm were studied at ambient temperature. The Judd-Ofelt theory was applied to characterize the absorption and luminescence spectra of Ho3+ and Er3+ ions in these glasses. Following 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 radiative life times for these transitions of Ho3+ and Er3+ have also been measured. The variations observed in these parameters were discussed in the light of varying coordinations (tetrahedral and octahedral positions) of Al3+ ions in the glass network. The energy transfer between the two rare earth ions (Ho3+ and Er3+) in codoped CaF2-Al2O3-P2O5-SiO2 glass system in the visible and near infrared (NIR) regions has also been investigated as a function of varying concentration of Al2O3. A significant enhancement in the intensities of B, G, and R lines has been observed due to codoping. The quantitative analysis of these results (with the aid of the data on IR and Raman spectral studies) has indicated that the glasses mixed with around 6.0 mol % of Al2O3 is the optimum concentration for yielding the highest quantum efficiency and for maximum energy transfer with low phonon losses.

  19. Investigation of phase equilibria in the system Nd 2O 3–Na 2O–P 2O 5. The partial system NdPO 4–Na 4P 2O 7–NaPO 3

    Microsoft Academic Search

    Teresa Znamierowska; Szymon Bandrowski

    2008-01-01

    The NdPO4–Na4P2O7–NaPO3 system being part of the Nd2O3–Na2O–P2O5 oxide system was investigated by thermoanalytical methods, X-ray powder diffraction and microscopy in reflected light. On the basis of the obtained results its phase diagram is proposed. The investigated partial system is bounded by three subsystems (i) NdPO4–NaPO3, (ii) Na4P2O7–NaPO3 and (iii) NdPO4–Na4P2O7. In the system NdPO4–NaPO3 an intermediate compound – NaNdP2O7

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

    NASA Astrophysics Data System (ADS)

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

    2014-03-01

    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.

  1. 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.

  2. 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

  3. 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

  4. 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

  5. Optical absorption and fluorescence spectral studies of Sm3+ ion in BaO-M2O3 (M = Ga, Al, In)-P2O5 glass systems

    NASA Astrophysics Data System (ADS)

    Prasad, S. V. G. V. A.; Lakshmana Rao, B.

    2009-07-01

    BaO-P2O5 glasses mixed with three IIIA group metal oxides viz., Al2O3, Ga2O3 and In2O3 doped with Sm2O3 were prepared. Optical absorption and photoluminescence spectra of these glasses have been studied. The absorption spectra of these glasses have revealed the absorption bands due to 6H5/2 ? 4I11/2, 4I13/2, 4G9/2, 6P5/2, 4F7/2, 6P7/2, 4D5/2, 4K17/2 transitions. By performing least square fit analysis, the Judd-Ofelt intensity parameters ?? for these glasses were evaluated; these parameters have exhibited the following trend: ?2 > ?4 >?6. The photoluminescence spectra with the excitation wavelength 400 nm recorded at room temperature of these glasses have exhibited the following emission transitions: 4G5/2 ? 6H5/2, 6H7/2, 6H9/2. From luminescence spectra, various radiative properties like transition probability A, branching ratio ?r, the radiative lifetime ?r and the emission cross-section ?E for various emission levels of these glasses have been determined and reported. Out of the three J-O parameters (??), the value of ?2 which is related to the structural changes in the vicinity of the Sm3+ ion indicated the highest covalent environment of Sm3+ ion in indium mixed glasses. The luminescence spectra of all the three glasses suggested the highest of values of transition probability 4G4 ? 6H9/2 in BGPSm glasses. The analysis of these results further indicted comparatively high non-radiative losses in In2O3 mixed glasses.

  6. Structural investigation of vanadium ions doped Li2Osbnd PbOsbnd B2O3sbnd P2O5 glasses by means of spectroscopic and dielectric studies

    NASA Astrophysics Data System (ADS)

    Yusub, S.; Narendrudu, T.; Suresh, S.; Krishna Rao, D.

    2014-11-01

    In the present investigation we report the synthesis of a series of transparent glasses of composition 20Li2Osbnd 20PbOsbnd 45B2O3sbnd (15-x) P2O5: xV2O5 with eight values of x ranging from 0 to 2.5 mol%, and their characterization. X-ray diffraction (XRD) spectra reflected the amorphous nature of the glasses. Optical absorption, electron paramagnetic resonance (EPR) spectra and FTIR study of vanadyl ions in the present glass network have been analyzed. The optical absorption and EPR investigations have revealed that vanadium ions do exist in both V4+ and V5+ states and the redox ratio (V4+/V5+) is observed to increase with the increase in concentration of V2O5. Dielectric properties viz., dielectric constant ??(?), loss tan ?, electrical moduli M?(?), M?(?), a.c. conductivity ?ac over an extensive scale of frequency and temperature have been investigated as a function of V2O5 concentration. The dispersion of dielectric constant ??(?) with temperature has been interpreted by space charge polarization model. The dielectric loss and electrical moduli variation with frequency and temperature exhibited relaxation effects. These effects are ascribed to V4+ ions. The a.c. conductivity of the prepared glasses is perceived to escalate with the hike in V2O5 concentration whereas the activation energy for conduction exhibits a reverse trend. The conductivity mechanism is explained on the basis of polaronic transfer between V4+ and V5+ ions. The low temperature a.c. conductivity mechanism is elucidated by the quantum mechanical tunneling model. The growth in the values of dielectric parameters with raise in the concentration of V2O5 is due to V4+ ions which act as modifiers. The investigation of these results has indicated that at higher concentrations of V2O5, the VO2+ ions in the glasses were present in octahedral sites with tetragonal compression and belong to C4v symmetry.

  7. 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, 10mol% 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

  8. 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

  9. A Thermodynamic Model of Phosphorus Distribution Ratio between CaO-SiO 2 -MgO-FeO-Fe 2 O 3 -MnO-Al 2 O 3 -P 2 O 5 Slags and Molten Steel during a Top–Bottom Combined Blown Converter Steelmaking Process Based on the Ion and Molecule Coexistence Theory

    Microsoft Academic Search

    Xue-Min Yang; Jian-Ping Duan; Cheng-Bin Shi; Meng Zhang; Yong-Liang Zhang; Jian-Chang Wang

    2011-01-01

    A thermodynamic model for calculating the phosphorus distribution ratio between top–bottom combined blown converter steelmaking\\u000a slags and molten steel has been developed by coupling with a developed thermodynamic model for calculating mass action concentrations\\u000a of structural units in the slags, i.e., CaO-SiO2-MgO-FeO-Fe2O3-MnO-Al2O3-P2O5 slags, based on the ion and molecule coexistence theory (IMCT). Not only the total phosphorus distribution ratio but

  10. Chemical durability and Structural approach of the glass series (40-y) Na2O-yFe2O3-5Al2O3-55P2O5-by IR, X-ray diffraction and Mössbauer Spectroscopy

    NASA Astrophysics Data System (ADS)

    Aqdim, S.; Sayouty, El H.; Elouad, B.; Greneche, J. M.

    2012-02-01

    The relationship between the composition and structure for the glasses of general composition (40-y)Na2O-yFe2O3-5Al2O3-55P2O5 (5<=y<=20), has been studied. The chemical durability and density of these glasses increase with increasing Fe2O3 content. The dissolution rate (DR), calculated from the weight loss in distilled water at 90°C for up to 20 days was ? 3.10-9 g/cm2/mn which is 30 times lower than that of window glass. The structure and valence states of the iron ions in the glasses were investigated using, X-ray diffraction, 57Fe Mössbauer spectrometry, potentiometric analysis, and infrared spectroscopy. Both Mössbauer spectrometry and potentiometric analysis allow to estimate both Fe2+ and Fe3+ contents in all these glasses. X-ray diffraction indicates that the local structure of iron phosphate glasses is related to the short range structures of NaFeP2O7. Infrared spectra indicate the formation of P-O-Fe bonds in the pyrophosphate glasses that replace P-O-Na bonds. The presence of a small content of Al2O3 in the glass seems to play a role as a network modifier. The addition of Fe2O3 to Al2O3 in phosphate glasses favours the enhancement of the formation of pyrophosphate units because iron ions have stronger effect on the depolymerization of metaphosphate chains than the aluminium ions. Finally, the I.R spectra indicate that the presence of P-O-Fe bands of these glasses containing more than 15 mol%Fe2O3 is consistent with their good chemical durability.

  11. 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

  12. Excitation light source dependence of emission in Sn2+-Ce3+ codoped ZnO-P2O5 glasses

    NASA Astrophysics Data System (ADS)

    Masai, Hirokazu; Hino, Yusuke; Yanagida, Takayuki; Fujimoto, Yutaka; Fukuda, Kentaro; Yoko, Toshinobu

    2013-08-01

    Correlation between excitation light source and the emission property of Sn2+-Ce3+ co-doped zinc phosphate glasses is examined. Although photoluminescence (PL) peaks of both Sn2+ and Ce3+ shifted with increasing amount of Ce3+, there was little energy resonance between Sn2+ and Ce3+ emission centers. On the other hand, radioluminescence (RL) spectra excited by X-ray was independent of the Ce concentration, indicating that emission was mainly observed from Sn2+ emission center. It is expected that energy relaxation process in a RL preferentially occurs in an ns2-type emission center that possesses high transition probability of the excited state in the higher energy region.

  13. [Índice de Saturación Modificado y Ambulancias (ISMA): Ambulance assignment and remote Emergency Room Bed Reservation].

    PubMed

    Polanco-González, Carlos; Castañón-González, Jorge Alberto; Villanueva-Martínez, Sebastián; Samaniego-Mendoza, José Lino; Buhse, Thomas

    2015-01-01

    Introducción: En gran parte del mundo, incluido nuestro país, los Servicios de Urgencias Médicas están sobresaturados. Esta situación obliga con frecuencia a redireccionar hacia otras unidades médicas las ambulancias que arriban de forma continua al Servicio de Urgencias, lo cual retrasa la admisión de los pacientes transportados y repercute desfavorablemente en su evolución. Objetivo: Presentar un complemento al sistema computacional Índice de Saturación Modificado (ISM), que monitorea el grado de saturación de una red de Servicios de Urgencias Médicas, para incluir una red de ambulancias, facultando al sistema para la asignación óptima de ambulancias al sitio del accidente o evento clínico grave y la reservación remota de camas en el Servicio de Urgencias más cercano y menos saturado. Material y métodos: La evaluación del complemento computacional y su conectividad al sistema ISM se llevaron a cabo con una prueba computacional que verificó estos dos aspectos, y que usó en sus medidas de tiempo únicamente diferencias entre códigos postales. Resultados: La verificación de su sostenimiento en tiempo real mostró que el nuevo sistema ISMA es una estructura robusta que se puede trasladar a teléfonos móviles, laptops o tablets y que administra de forma eficiente la medición de la sobredemanda de los Servicios de Urgencias de su red hospitalaria, la asignación de ambulancias y pacientes en las mejores condiciones de distancia-tiempo al sitio del accidente o evento clínico más cercano y menos saturado, y la asignación de las ambulancias que han de acudir al sitio del evento o contingencia. Conclusiones: Esta herramienta de gestión administrativa es eficiente y simple de usar, y relaciona de forma óptima redes de servicio independientes. PMID:26089266

  14. Influence of rare earth addition on the thermal and structural stability of CaOsbnd Fe2O3sbnd P2O5 glasses

    NASA Astrophysics Data System (ADS)

    Li, Haijian; Liang, Xiaofeng; Wang, Cuiling; Yu, Huijun; Li, Zhen; Yang, Shiyuan

    2014-11-01

    The thermal and structural stability of calcium iron phosphate glasses doped with rare earth oxides has been studied by investigating differential scanning calorimetry, the concentration of modified ions in leachate, Fourier transform infrared spectra, and Raman spectra. The results showed that thermal stability of the rare earth phosphate glasses increased and the release rate of rare earth ions in leachate decreased with the increase of cationic field strength. It related to the known structural units and characteristic bands of these glasses detected by infrared and Raman spectra. Metaphosphate chains by the cross-links of calcium ions and Psbnd Osbnd P linkages were easier to hydrolyze, which converted to orthophosphate units after corrosion. The formation of more chemically resistant REsbnd Osbnd P bonds with the addition of rare earth leaded to an increased quantity of nonbridging oxygen, which caused consequent variations in the chemical durability of rare earth glasses.

  15. Influence of Al 2O 3 additions on crystallization mechanism and conductivity of Li 2O–Ge 2O–P 2O 5 glass–ceramics

    Microsoft Academic Search

    He Kun; Wang Yanhang; Zu Chengkui; Zhao Huifeng; Liu Yonghua; Chen Jiang; Han Bin; Ma Juanrong

    2011-01-01

    The crystallization mechanism and conductivity of lithium aluminum germanium phosphate [LAGP] glass–ceramics fabricated from Li1+xAlxGe2?x(PO4)3 (x=0.0–0.7) glass system were investigated as a function of Al2O3 additions. A non-isothermal analysis was performed to study the crystallization behavior of LAGP glass–ceramics at various heating rates (5–25Kmin?1) by the Kissinger equation and the Augis–Bennett equation, illustrating volume crystallization for the glass-ceramics. The crystal

  16. The influence of valence states of tungsten ions on PbO-Y2O3-P2O5 glass network

    NASA Astrophysics Data System (ADS)

    Prasad, S. V. G. V. A.

    2014-09-01

    Lead yttrium phosphate glasses mixed with different concentrations of WO3 (ranging from 0 to 5.0 mol%) were synthesized. Differential thermal analysis (DTA), optical absorption, ESR and IR spectral studies have been carried out. The results of DTA have indicated that there is a gradual decrease in the resistance of the glass against devitrification with increase in the concentration of WO3 up to 3.0 mol%. The optical absorption spectra of these glasses exhibited a relatively broad band peaking at about 850 nm identified due to dxy - dx2-y2 transition of W5+ ions; this band is observed to be more intense in the spectrum of glass containing 3.0 mol% of WO3. The ESR spectra of these glasses recorded at room temperature exhibited an asymmetric signal at g? ? 1.71 and g|| ? 1.62. The intensity of the signal is observed to be maximal for the spectrum of the glass PYPW3. The optical absorption and ESR spectral studies have indicated that there is a maximum reduction of tungsten ions from W6+ state to W5+ state in the glass containing 3.0 mol% of WO3. The IR spectral studies have indicated that there is an increasing degree of disorder in the glass network with increase in the concentration of WO3 up to 3.0 mol%.

  17. High lithium ion conductivity glass-ceramics in Li 2O–Al 2O 3–TiO 2–P 2O 5 from nanoscaled glassy powders by mechanical milling

    Microsoft Academic Search

    Xiaoxiong Xu; Zhaoyin Wen; Xuelin Yang; Jingchao Zhang; Zhonghua Gu

    2006-01-01

    Mechanical milling (MM) has been used to prepare the nanosized Li1.4Al0.4Ti1.6(PO4)3 (denoted LATP) glassy powders, which was converted into glass-ceramics through thermal treating at 700–1000°C. The XRD, TEM, FESEM and ac impedance techniques were used to characterize the products. The results showed that completely amorphous products were prepared by MM for 40h, and single-phase LiTi2(PO4)3-type structured glass-ceramics were obtained by

  18. Entrevista con Vicente Leñero

    E-print Network

    Day, Stuart A.

    2004-01-01

    también en la vida profesional de Leñero. Poco después de este acontecimiento algunos de los ex-colaboradorcs de Excélsior, dirigidos nuevamen te por Julio Scherer y con Leñero como vocal, forman una agencia de noticias que empieza con dos máquinas... de la primera edición de Proceso, Leñero decide ignorar este incidente para hacerlo materia de su novela testimonial Los periodistas, al mismo tiempo que lo instituye en travesura para no sucumbir ante el miedo. Su formación periodística, combinada...

  19. Entrevista con Sergio Vodanovic

    E-print Network

    Agosin, Marjorie

    1984-04-01

    de pionero dentro del teatro chileno contemporáneo. Este es el tema de la entrevista cuyas preguntas fueron contestadas directamente por Vodanovic y transcritas en la misma manera como aparecen en el texto. ¿Cómo ves tú el teatro chileno desde el... remora de los teatros que antes eran líderes, de los teatros universitarios que, en general, se mantienen dentro de una posición de dar obras clásicas u obras de teatros universal, y con mucho temor respecto al teatro chileno. ¿ Tú crees que el público...

  20. Entrevista con Santiago García

    E-print Network

    Baycroft, Bernard

    1982-04-01

    muchas resistencias que había entre la gente de tea tro a este fenómeno de la creación colectiva, que aparece compitiendo con el autor y entrando al terreno de la creatividad artística. ¿Cómo es esto diferente a la práctica del Teatro Experimental de... teatral que nosotros estamos produciendo porque el tener este pú blico y un campo de experimentación tan fecundo como es ése de los sectores populares, más avanzados, más revolucionarios, más progresistas de nuestro país, garantizaría ya la...

  1. Entrevista con Enrique Buenaventura

    E-print Network

    Dí ez, Luys A.

    1981-04-01

    el individuo; entrañable y sencillo, conversador penetrante y muy ameno. Y fue en esta capacidad, aprovechando una falla en la programación, que una tarde le acompañamos a ver A Chorus Line, el musical de Bennett, que le iba a interesar... todavía muestran las huellas de los terribles bombardeos e incendios, con las paredes acribilladas por todas partes. Y luego las historias que iba contando todo el mundo, tantas que en realidad sería muy difícil escoger. Yo he seleccionado unas pocas y...

  2. Crnica ornitolgica con las citas

    E-print Network

    Carrete, Martina

    Crónica ornitológica con las citas más relevantes del año 2000 Estudio de la avifauna de las balsas seguimiento que ha realizado a la avifauna del paraje. · La crónica ornitológica del año 2000, con las

  3. Entrevista con Wilberto Cantón

    E-print Network

    Vé lez, Joseph F.

    1979-10-01

    FALL 1979 71 Entrevista con Wilberto Cantón JOSEPH F. VÉLEZ Señor Cantón, ¿quisiera usted decirme donde y cuándo nació?1 Nací en la ciudad de Mérida, Yucatán, el día 15 de julio de 1925. ¿Puede usted ahora decirnos un poco de su educación... primaria, secundaria y universitaria, ya haya sido en México o en el extranjero? Sí. Yo hice mis primeros estudios allá en la ciudad de Mérida y, posterior mente, vine a México, y aquí cursé el bachillerato y mi profesión, que es de abogado. Terminé...

  4. 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.

  5. Relaciones trigonometricas Operaciones con logaritmos

    E-print Network

    Relaciones trigonom´etricas Operaciones con logaritmos Funciones elementales y sus gr´aficas Gr´aficas de funciones elementales L´imites Continuidad Tema 1: Repaso de conocimientos previos. Funciones´etricas Operaciones con logaritmos Funciones elementales y sus gr´aficas Gr´aficas de funciones elementales L

  6. LA PRÁCTICA EDUCATIVA CON DISCAPACITADOS

    Microsoft Academic Search

    Eduardo Ullate Rada

    2010-01-01

    La práctica educativa con discapacitados suponía un reto para mí. Con la realización del curso de monitor de tiempo libre me vi obligado a realizar unas prácticas educativas que no sabía en qué lugar y ciudad iba a realizarlas. Tras una larga meditación decidí explorar un “nuevo mundo”, el de la educación de personas discapacitadas.

  7. 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

  8. Una entrevista con Emilio Carballido.

    E-print Network

    Vé lez, Joseph F.

    1973-10-01

    FALL 1973 17 Una entrevista con Emilio Carballido JOSEPH F. VÉLEZ V. Señor Carballido, ¿podría decirme cuándo comenzó a interesarse en escribir? C. Fui un niño precoz que escribió mucho desde muy chamaquito. V. ¿Qué escribió primero: poesía... han presentado aquí? C. Todavía no. Pero parece que el teatro de Fuentes no es realista, y está más bien emparentado con otras corrientes. El teatro de Leñero tiende a ser teatro documental. El tuerto es rey, de Fuentes, tiene, parece...

  9. Programando con Igualdad Similar Estricta

    Microsoft Academic Search

    Ginés Moreno; Vicente Pascual

    Resumen En los últimos años, hemos sido testigos del importante papel que la lógica difusa o borrosa (fuzzy logic) ha jugado en el desarrollo de sofisticadas aplicaciones software en campos tan diversos como los sistemas expertos, inteligencia artificial, control industrial, medicina, etc. Con el objetivo de facilitar el desarrollo de tales aplicaciones, mucho más recientemente ha surgido el interés por

  10. Cefalea con criterios de alarma

    Microsoft Academic Search

    Nuria Martínez Sánchez; Antonio Palasí Franco; Luis Miguel Martínez Sánchez

    2010-01-01

    La alta prevalencia de cefalea en la población general hace que sea uno de los principales motivos de consulta neurológica en Atención Primaria tanto para el médico de familia como para el neurólogo. Pese a que la mayoría de las consultas están motivadas por cefaleas primarias (migraña y cefalea tensional son, con mucho, las cefaleas más prevalentes) hay que tener

  11. todasuvida: Las personas con diabetes son ms

    E-print Network

    diabetes Controlesu todasuvida: Las personas con diabetes son más propensas a padecer de enfermedades del corazón que quienes no tienen diabetes. Boletín 631 D Las personas con diabetes tienen mayor- res relacionados con la diabetes, como derrame cerebral, mala circulación en las piernas y pies e

  12. Sulla termodinamica dei materiali con memoria

    Microsoft Academic Search

    Dario Graffi

    1974-01-01

    Sunto  Si espone limitandosi, per semplicità, ai corpi solidi con deformazioni infinitesime, la teoria di Coleman sulla termodinamica\\u000a dei materiali con memoria. Si considerano poi, in particolare, i corpi viscoelastici lineari e identificata l'energia libera\\u000a con l'energia potenziale interna di Volterra, si deducono, dalla termodinamica, proprietà dei coefficenti di memoria, finora\\u000a ammesse come intuitive e si ottiene una rapida dimostrazione del

  13. Modeling Dynamic Domains with ConGolog

    Microsoft Academic Search

    Yves Lespérance; Todd G. Kelley; John Mylopoulos; Eric S. K. Yu

    1999-01-01

    In this paper, we describe the process specification language ConGolog and show how it can be used to model business processes for requirements analysis. In ConGolog, the effects of actions in a dynamic domain are spec- ified in a logical framework. This supports modeling even in the absence of complete information. The behavior of agents in the domain is specified

  14. ProteoCon kit Handbook www.geba.org ProteoCon Kit

    E-print Network

    Lebendiker, Mario

    The ProteoCon kit technology ................................................................3 Mini bottle 2 bottles Buffer WBD2 (washing buffer) 30 ml 60 ml ProteoConN kit 10 units 20 units Proteo. Limitations on Product use The ProteoCon kits were developed designed and are being sold for resear

  15. Tensión postraumática relacionada con el cáncer (PDQ®)

    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.

  16. LA MAESTRA EN CIENCIAS (NEUROBIOLOGA), Con el objetivo de formar profesionales con conocimientos slidos de los

    E-print Network

    Islas, León

    LA MAESTRÍA EN CIENCIAS (NEUROBIOLOGÍA), Con el objetivo de formar profesionales con conocimientos, neurociencias, psicobiología, física, matemáticas, estadística y metodología de la ciencia, a presentar su Nacional de Posgrado de Calidad del Consejo Nacional de Ciencia y Tecnología en categoría: COMPETENTE

  17. Too Many Minas Spoil The Con

    E-print Network

    2007-02-13

    and in livejournal, I suddenly got the urge to go to a con again. The thought of a proper anime con, with people dressing up and showing videos and panels and discussions about the series and even about writing fanfiction, well, I thought that you must be involved...'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 standing in for H.P Lovecraft (I mean, everyone knew that it was a...

  18. CON Advising Academic Year 2013-2014

    E-print Network

    Carter, John

    in achieving the learning outcomes, ensuring student academic success, and planning to achieve the studentsCON Advising Academic Year 2013-2014 Advisors: Rita Tower Kelly Fanning Office: Garrand 403 Garrand students to make decisions about their academic, personal and professional pathways, and to encourage

  19. Diagramas de Voronoi con funciones temporales \\Lambda

    E-print Network

    Palop del Río, Belén

    Diagramas de Voronoi con funciones temporales \\Lambda Ferran Hurtado, Bel'en Palop, Vera Sacrist'etricas. En este trabajo se describen los diagramas de Voronoi dados por funciones temporales surgidas al introducir en el plano una red de transporte. Dichas funciones pueden dar lugar a bisectores que no forman un

  20. Google Scholar: the pros and the cons

    Microsoft Academic Search

    Péter Jacsó

    2005-01-01

    Purpose – To identify the pros and the cons of Google Scholar. Design\\/methodology\\/approach – Chronicles the recent history of the Google Scholar search engine from its inception in November 2004 and critiques it with regard to its merits and demerits. Findings – Feels that there are massive content omissions presently but that, with future changes in its structure, Google Scholar

  1. Teorías sobre cobertura con contratos de futuro

    Microsoft Academic Search

    Vicent Aragó Manzana

    2009-01-01

    En este trabajo se presenta una revisión de las principales teorías sobre cobertura con contratos de futuro y de los distintos métodos de estimación utilizados para determinar el ratio de cobertura óptimo. La aproximación a la cobertura más utilizada en la literatura especializada es la basada en el modelo de la teoría de carteras. No obstante, debido a sus hipótesis

  2. VANET Routing Protocols: Pros and Cons

    E-print Network

    Paul, Bijan; Bikas, Md Abu Naser

    2012-01-01

    VANET (Vehicular Ad-hoc Network) is a new technology which has taken enormous attention in the recent years. Due to rapid topology changing and frequent disconnection makes it difficult to design an efficient routing protocol for routing data among vehicles, called V2V or vehicle to vehicle communication and vehicle to road side infrastructure, called V2I. The existing routing protocols for VANET are not efficient to meet every traffic scenarios. Thus design of an efficient routing protocol has taken significant attention. So, it is very necessary to identify the pros and cons of routing protocols which can be used for further improvement or development of any new routing protocol. This paper presents the pros and cons of VANET routing protocols for inter vehicle communication.

  3. Somatic cell nuclear transfer: pros and cons.

    PubMed

    Sumer, Huseyin; Liu, Jun; Tat, Pollyanna; Heffernan, Corey; Jones, Karen L; Verma, Paul J

    2009-01-01

    Even though the technique of mammalian SCNT is just over a decade old it has already resulted in numerous significant advances. Despite the recent advances in the reprogramming field, SCNT remains the bench-mark for the generation of both genetically unmodified autologous pluripotent stem cells for transplantation and for the production of cloned animals. In this review we will discuss the pros and cons of SCNT, drawing comparisons with other reprogramming methods. PMID:20232594

  4. Too Many Minas Spoil The Con 

    E-print Network

    2007-02-13

    1 12:08 pm February 13th, 2007 vuirneen A semi-private email to Mina de Malfois Is anyone familiar with the writings of mina_de_malfois? I wrote this email to her, based entirely on her Minaverse, between... midnight and two am last night and I just wanted someone to check it before I send it to her. Too Many Minas Spoil The Con Dear Mina, I'm not quite sure how to start this letter. I feel as though I've failed a test of some kind and that if I only...

  5. Connector Generator (ConGen) Table of contents

    E-print Network

    Connector Generator (ConGen) Table of contents 1 Overview of Con of ConGen Software connectors are typically used in component-based engineering to model and realize component interconnections. Connectors play an important role both at design time, when they allow

  6. Combinando multiples discretizadores para aprendizaje de reglas evolutivo con enfoque

    E-print Network

    Bacardit, Jaume

    resultados de las pruebas realizadas con diversos dominios muestran que se consigue obtener un sistema clasi sistemas GABIL [3] y XCS [4] respectivamente. Para tratar con problemas con atributos reales una de las representaciones del conocimiento clasicas de este tipo de sistemas. Un buen algorit­ mo de discretizacion tiene

  7. Análisis comparado de los contratos marco para operaciones con derivados

    Microsoft Academic Search

    Iván Eduardo Rozo; Lina Maria Contreras; Laura Maria Gallego

    2010-01-01

    En teoría, las operaciones con derivados son instrumentos financieros cuyo propósito es cubrir los riesgos sobre los flujos a recibir, no obstante un contrato de esta naturaleza que presente vacíos o no cuente con provisiones suficientes, puede generar riesgos adicionales y costos de transacción aún mayores a los que se intentaba mitigar inicialmente. De acuerdo con lo anterior, este documento

  8. Energy Star program benefits Con Edison

    SciTech Connect

    NONE

    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.

  9. Tiene familiares con Alzheimer? La Escuela de Medicina del Recinto de Ciencias Mdicas en colaboracin con la Universidad de Columbia

    E-print Network

    Quirk, Gregory J.

    ¿Tiene familiares con Alzheimer? 25/1/2008 La Escuela de Medicina del Recinto de Ciencias Médicas más con Alzheimer para participar de un estudio genético. La investigación pretende encontrar genes que se encuentren relacionados a la enfermedad de Alzheimer con el propósito de aprender más sobre las

  10. Web Spoofing: An Internet Con Game

    NSDL National Science Digital Library

    Balfanz, Dirk .

    1996-01-01

    The Safe Internet Programming group at the Princeton University Department of Computer Science in 1996 published a paper on the practice known as "web spoofing," through which an attacker intervenes between an end-user browsing the Web and real Web sites. The attacker sets up a shadow copy of the Web, and as users request pages from sites they will receive pages from the attacker's site instead. This process also enables attackers to gather data (possibly credit card numbers, etc.) submitted through bogus web forms. The nine-page paper describes how the con game works and suggests remedies. The article is available in PostScript, compressed PostScript, Microsoft Word, and zipped Microsoft Word format. Unfortunately, it is not available online as HTML.

  11. ConChord: Cooperative SDSI Certificate Storage and Name Resolution

    Microsoft Academic Search

    Sameer Ajmani; Dwaine E. Clarke; Chuang-hue Moh; Steven Richman

    2002-01-01

    We present ConChord, a large-scale certicate distribution system built on a peer-to-peer distributed hash table. ConChord provides load-balanced storage while eliminating many of the administrative dif- culties of traditional, hierarchical server architectures. ConChord is specically designed to support SDSI, a fully-decentralized public key infrastructure that allows principals to dene local names and link their namespaces to delegate trust. We discuss

  12. 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

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

    E-print Network

    Oak Ridge National Laboratory

    -okfl ^ ORNL/CON-172 OAK RIDGE NATIONAL LABORATORY Linear Harmonic Analysis of Free- Piston. #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

  15. VARIABILIDAD DE UN DIFRASISMO MAYA : EMPAREJAMIENTOS CON CH'AB

    E-print Network

    Boyer, Edmond

    VARIABILIDAD DE UN DIFRASISMO MAYA : EMPAREJAMIENTOS CON CH'AB JEAN-MICHEL HOPPAN* Y EMILIE por el análisis de la literatura maya previa al período de la conquista española1 aparece en forma de, propio de los mayas, consiste en el emparejamiento de un glifo que se lee ch'ab con otro que se lee ak

  16. 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

  17. iCons, 2011 Alzheimers and Aluminum: Lesson Plan

    E-print Network

    Auerbach, Scott M.

    © iCons, 2011 Alzheimers and Aluminum: Lesson Plan Handouts to explore mechanistic link between Alzheimer's and aluminum 5. Brief proposal expanding Points to Aluminum's Link With Alzheimer's Disease" from 1989. Provide handout

  18. Each year Minnesota Agricultural Experiment Station scientists con-

    E-print Network

    Minnesota, University of

    October. Plots at Rosemount and Roseau had hail at mid-season, which reduced yields. Tables 1 to 4 provide, Rosemount, Stewart, Wabun and Waseca. Tables 15 to 17 present SCN infor- mation from greenhouse tests con

  19. ConFunc - functional annotation in the twilight zone

    Microsoft Academic Search

    Mark N. Wass; Michael J. E. Sternberg

    2008-01-01

    Motivation: The success of genome sequencing has resulted in many protein sequences without functional annotation. We present ConFunc, an automated Gene Ontology (GO)-based protein function prediction approach, which uses conserved residues to generate sequence profiles to infer function. ConFunc split sets of sequences identified by PSI-BLAST into sub-alignments according to their GO annotations. Conserved residues are identified for each GO

  20. Breath analysis science at PittCon 2012, Orlando, Florida

    Microsoft Academic Search

    Joachim D Pleil; Matthew A Stiegel; Tzipporah M Kormos; Jon R Sobus

    2012-01-01

    BackgroundBreath 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 chemistry and instrumentation, typically attracting about 20 000 attendees and 1000 commercial exhibitors (Pleil 2010, 2011). This year the conference was held in Orlando,

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

    Microsoft Academic Search

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

    2006-01-01

    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

  2. PROPUESTA DEL PROGRAMA Este grupo cuenta con 30 personas con un fin comun, el aporte al desarrollo de

    E-print Network

    de la matem´atica, en particular de los sistemas din´amicos en el Uruguay. Se ha separado la parte´ian particicipado de la pr´actica de la matem´atica en el Uruguay con un grupo de j´ovenes estudiantes que hab actividad, este grupo se ha consolidado como el mayor grupo de estudio de la matem´atica en el Uruguay, con

  3. Blond Blintz Bulletin Special Zebra-Con Edition 1

    E-print Network

    Multiple Contributors

    1979-01-01

    CON REPOR by Paulie Gi lmore Zebra Con Has hel d at t he Helrose Park Hol iday Inn . July 21. 28, and 29. and ~ras attended by about 60 of t he 65 people scheduled to come. ~re als Here proudly .... upported by 35 others. I suppose should take...'s over for now. Time to go ome ,:r .t .: GHOST CRIES by Febra Jean Ulch [i J]otty llil]ierison It was a quiet and peaceful place, nob like a park-than a cenetery' A s,nrff-ero;o "t=oapf"'rpful;;h;A ,i.-C*ripf"d ,gravesi.*- . Thpre wgre...

  4. Dia internacional de la dona Exposicin "Trabajo social con las mujeres" Pgina 1 de 2

    E-print Network

    Escolano, Francisco

    al.]. El apoyo social de mujeres solas con responsabilidad familiar: un estudio con madres usuariasDia internacional de la dona ­ Exposición "Trabajo social con las mujeres" Página 1 de 2 SELECCIÓN DE LIBROS PARA LA EXPOSICIÓN "TRABAJO SOCIAL CON LAS MUJERES" Alemán Bracho, Carmen, García Serrano

  5. Una gua de navegacin para las familias de Wisconsin con nios y

    E-print Network

    Wisconsin at Madison, University of

    Una guía de navegación para las familias de Wisconsin con niños y jóvenes con necesidades especiales de salud y discapacidades. GUÍA DE RECURSOS #12;#12;1 GUÍA DE RECURSOS Una guía de navegación para las familias de Wisconsin con niños y jóvenes con necesidades especiales de salud y discapacidades

  6. 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

  7. FUNCIONES CONTINUAS CON MAXIMOS LOCALES DENSOS GODOFREDO IOMMI

    E-print Network

    Iommi, Godofredo

    FUNCIONES CONTINUAS CON M´AXIMOS LOCALES DENSOS GODOFREDO IOMMI Abstract. En estas notas estudiaremos la clase de funciones continuas que poseen m´aximos estrictos locales en un conjunto denso. Siguiendo el trabajo de Posey y Vaughan construiremos un ejemplo expl´icito de una funci´on que pertenece

  8. 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.

  9. On Invariant Con guration of a Three-Fingered Grasp

    E-print Network

    Payandeh, Shahram

    using screw theory and inner product spaces. The results are shown to present themselves as an elegant advantage of the grasp con guration and the screw geometry. However, their method did not take advantage of the fundamental coordinate free property of screw systems and it was rather an algebraic approach. Various methods

  10. Real-time Coastal Observation Network (ReCON)

    E-print Network

    Real-time Coastal Observation Network (ReCON) The need for development of regional coastal. High bandwidth, wireless Ethernet-based system. Real-time, secure data access. Universal sensor real-time whole water column observations of physical, chemical, and biological variables. The Re

  11. performances, lectures, demonstra-tions, and workshops exploring con-

    E-print Network

    Miranda, Eduardo Reck

    promoted three major concerts in three different spaces. The opening event brought together the jazz of Frances Lynch, one of the few international singers to have worked closely with composers of electro- acoustic music. Her dramatic and most commited performances con- tinue to inspire many composers, not least

  12. Desarrollo costero y conservacin marina en armona con las personas

    E-print Network

    Richner, Heinz

    también explotan los recursos del mar pero que no se preocupan por el desarrollo sostenible. LaDesarrollo costero y conservación marina en armonía con las personas Los debates sobre la conservación marino costera El desarrollo y conservación de las costas de Costa Rica es concebido de formas

  13. 2006 Annual Report TAble of ConTenTS

    E-print Network

    Security Management and Assistance Security Testing and Metrics Security Technology Security Research, tests, and validation programs to promote, measure, and validate security in systems and services. WeComputer Security Division 2006 Annual Report #12;TAble of ConTenTS Welcome Letter Division

  14. Preserving con dentiality when sharing medical database the Cellsecu system

    E-print Network

    Chen, Sheng-Wei

    named Cellsecu that maintains not only the anonymity but also the con dentiality of each cell identi ers, such as name, address, and phone numbers. Simply removing all the explicit iden- ti ers, the existence of such database would enable researchers to track certain diseases as well as to patients

  15. Stochastic Con nement of Rossby Waves by Fluctuating Eastward Flows

    E-print Network

    Monahan, Adam Hugh

    Stochastic Con#12;nement of Rossby Waves by Fluctuating Eastward Flows Adam Hugh Monahan, Lionel axis - the so-called beta e#11;ect [20]. These planetary, or Rossby, waves have played an important of stationary Rossby waves on zonally- inhomogeneous ows such as the climatological boreal winter 300 mb ow

  16. con Diabetes Su diabetes s se puede controlar!

    E-print Network

    Do Well, Be Well con Diabetes ¡Su diabetes sí se puede controlar! Educational programs of the Texas, and the County Commissioners Courts of Texas Cooperating. to develop diabetes self-care skills, to improve eating habits and maintain good nutrition, to increase physical activity, to prevent diabetes complications

  17. L' ABUSO DI FARMACI NEL PAZIENTE CON CEFALEA: POSSIBILI INDICATORI

    Microsoft Academic Search

    PAOLA BROGGI; SANDRO IANNACCONE; LILIANA NOVELLA; STEFANO CLERICI; ANDREA FOSSATI; LUCIO SARNO

    L'abuso di farmaci tra le persone affette da disturbi cefalalgici rappresenta un problema di notevole rilevanza clinica, sia per il Medico di Medicina Generale (MMG), che frequentemente rappresenta il primo e unico inter- faccia con il paziente cefalalgico, sia per lo specialista Neurologo, che viene chiamato alla gestione di quadri clinici talora complessi. L'assunzione eccessiva o non congrua di alcuni

  18. 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.

  19. Null alleles for salivary Concanavalin A-binding (Con A) and Po proteins at PRB2 and PRB4 loci

    Microsoft Academic Search

    E. A. Azen; E. Amberger

    1994-01-01

    Six closely linked PRP (proline-rich protein) genes code for many salivary PRPs which show frequent null variants especially. The Con polymorphism includes the different sized Con 1 and Con 2 proteins and the null Con 0 form. N-terminal amino acid sequences (60 aa) were determined on Con 1 and Con 2 proteins. From comparison of the protein sequences with those

  20. Expandiendo los límites del teatro: Una entrevista con Astrid Hadad

    E-print Network

    Alzate, Gastó n

    1997-04-01

    SPRING 1997 153 Expandiendo los límites del teatro: Una entrevista con Astrid Hadad Gastón Álzate Astrid Hadad, nacida en Chetumal, Quintana Roo (México) y de padres libaneses, es hoy en día una de las artistas más significativas dentro de un... consolidado un espacio propio. Esto se puede apreciar en el trabajo desarrollado por Jesusa Rodríguez, Liliana Felipe y la misma Astrid Hadad. Es importante anotar que existe un buen número de artistas que ha venido desarrollando trabajos paralelos, como es...

  1. Vibrational and rotational relaxation in a CON2 laser

    Microsoft Academic Search

    R. Charneau; F. Legay; N. Legay-Sommaire; G. Taieb

    1975-01-01

    A double-resonance method inside the optical cavity of a CO-N2 laser has been used to study vibrational and rotational relaxation processes in the amplifying medium. Measurements of rotational relaxation of CO are in agreement with the work of other authors. Measurements of the V-V exchange rates between two molecules in a high vibrational state (v approximately equal to 10) suggest

  2. Segundo Catálogo Estelar del Hemisferio Sur con Astrolabio Fotoeléctrico PAII

    NASA Astrophysics Data System (ADS)

    Manrique, W. T.; Podestá, R. C.; Alonso, E.; Actis, E. V.; Pacheco, A. M.; Bustos, G.; Lizhi, L.; Zezhi, W.; Fanmiao, Z.; Hongqi, W.; Perdomo, R.

    Recordamos que entre el Observatorio Astronómico ``Félix Aguilar'', el Observatorio Astronómico de Beijing y el Observatorio Astronómico de La Plata, se ha convenido en desarrollar un Proyecto de Investigación conjunto, para la observación sistemática de estrellas en el Hemisferio Sur, con el objeto de la elaboración de un Catálogo Estelar Global utilizando un Astrolabio Fotoeléctrico PAII del Observatorio de Beijing, que ha sido usado con éxito en la República de China. En este trabajo se presenta el Segundo Catálogo Estelar del Hemisferio Sur, derivado de las observaciones realizadas con el PAII instalado en el OAFA, durante el períiodo Febrero de 1992 a Marzo de 1997. En este lapso se han observado mas de 400000 pasajes estelares, obteniéndose las correcciones ? ? y ? ? de 5241 estrellas del FK4, FK5, FK5 Ext., SRS, CAMC y GC. Las precisiones medias son del orden de ± 3,2 ms en ascensión recta y ±0."057 en declinación. Rango de magnitudes : 2,0 a 11,5 Rango de declinaciones : -3o a -60o Epoca Media : 1994.9 Se analizan los residuos en función de la magnitud y tipo espectral, correcciones de grupo y frecuencia de distribución ? ? y ? ?.

  3. 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

  4. Aspectos relacionados con la sexualidad y la reproducción –para profesionales de salud (PDQ®)

    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.

  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. 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...

  7. El teatro como reflexión colectiva: Conversación con Sergio Corrieri

    E-print Network

    Luzuriaga, Gerardo

    1983-04-01

    gente del Escambray se nos queja. Uno de los aspectos más interesantes, a mi modo de ver, de la experiencia del Teatro Escambray es que todo este proceso se ha ido haciendo sobre la marcha, ha ido surgiendo, como tú decías hace poco, de la práctica... grandes rasgos, por supuesto. Por nuestra convivencia en la zona y por los multiples canales naturales que eso nos brinda, nosotros estamos actualizados de la problemática. Aparte, con el tiempo, el Escambray ha ido perdiendo artistas particulares en el...

  8. 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.

  9. Las espirales de Fibonacci podran estar relacionadas con la tensin 26/04/2007 Astroseti

    E-print Network

    Zexian, Cao

    Las espirales de Fibonacci podrían estar relacionadas con la tensión 26/04/2007 Astroseti Las espirales de Fibonacci podrían estar relacionadas con la tensión. La serie de Fibonacci ­ en la cual cada tensión" para crear espirales con la serie de Fibonacci en microestructuras que crecen en laboratorio

  10. Information Loss in Coarse Graining of Polymer Con gurations via Contact

    E-print Network

    - duced description of this system can be based [7, 10, 13, 14] on associating to each polymer con#12Information Loss in Coarse Graining of Polymer Con#12;gurations via Contact Matrices Patrik L description of the con- #12;guration ! of a linear chain (polymer or random walk) on Z n : C ij (!) = 1 when

  11. Trastorno por déficit de atención con hiperactividad: orientaciones psicoeducativas para los padres

    Microsoft Academic Search

    López Villalobos; S. Alberola López; José Antonio López Villalobos

    2008-01-01

    Resumen Se exponen orientaciones psicoeducativas para padres de niños con trastorno por déficit de atención con hiperactividad (TDAH), basadas en criterios empíricos, teóricos y clínicos, abor- dando las siguientes dimensiones: ambiente familiar, modelado, refuerzo de conducta, normas, autonomía y autoestima, aprender a pensar y saber esperar, atención, relación con compañeros, grupo familiar, adolescencia y una reflexión sobre el tratamiento. Palabras

  12. Sepsis por Salmonella enteritidis en una paciente con lupus eritematoso sistémico

    Microsoft Academic Search

    Carlos Alberto Cañas; Gustavo Adolfo Ospina; María Elena Ochoa; Juan Diego Vélez

    Resumen Presentamos el caso clínico de una paciente de 28 años de edad con Lupus Eritematoso Sistémico (LES), con compromiso a nivel neurológico central, riñón y sistema hematológico, con tratamiento cró- nico de esteroides y desnutrición avanzada, quien desarrolla sepsis por Salmonella enteritidis, germen aislado en muestras tomadas en lavado bronco alveolar, sangre y materia fecal. Presentó un absce- so

  13. Accesibilidad para personas con debilidad motriz ASIC 18 de noviembre de 2010 Pg. 1 de 7

    E-print Network

    Fernández de Córdoba, Pedro

    Accesibilidad para personas con debilidad motriz Windows XP ASIC ­ 18 de noviembre de 2010 Pág. 1: · Pulse T Utilizando el ratón #12;Accesibilidad para personas con debilidad motriz Windows XP ASIC ­ 18 de)... #12;Accesibilidad para personas con debilidad motriz Windows XP ASIC ­ 18 de noviembre de 2010 Pág. 3

  14. Accesibilidad para personas con debilidad visual ASIC 18 de noviembre de 2010 Pg. 1 de 6

    E-print Network

    Fernández de Córdoba, Pedro

    Accesibilidad para personas con debilidad visual Windows XP ASIC ­ 18 de noviembre de 2010 Pág. 1: · Pulse T #12;Accesibilidad para personas con debilidad visual Windows XP ASIC ­ 18 de noviembre de 2010 seleccionando las opciones adecuadas). #12;Accesibilidad para personas con debilidad visual Windows XP ASIC ­ 18

  15. Accesibilidad para personas con debilidad auditiva ASIC 18 de noviembre de 2010 Pg. 1 de 8

    E-print Network

    Fernández de Córdoba, Pedro

    Accesibilidad para personas con debilidad auditiva Windows 7 ASIC ­ 18 de noviembre de 2010 Pág. 1 sonidos. #12;Accesibilidad para personas con debilidad auditiva Windows 7 ASIC ­ 18 de noviembre de 2010 con debilidad auditiva Windows 7 ASIC ­ 18 de noviembre de 2010 Pág. 3 de 8 -Figura 1-Centro de

  16. COMPARACIÓN ENTRE LA TERAPIA CONVENCIONAL ODONTOLÓGICA Y SU USO COMBINADO CON LA FISIOTERAPIA Y LA OSTEOPATÍA, EN PACIENTES CON DISFUNCIÓN TEMPOROMANDÍBULAR. \\

    Microsoft Academic Search

    Graciela Carvallo; Maria Fasanella; Sofia Caricote

    RESUMEN Dado que la disfunción temporomandibular es una patología que cursa frecuentemente con, dolor y limitación en la apertura bucal los pacientes afectados reducen su calidad de vida desde el punto de vista social, laboral y familiar. La presente investigación tiene como propósito evaluar comparativamente los alcances terapéuticos entre el tratamiento odontológico convencional y el uso combinado de éste, con

  17. Do Well, Be Well with Diabetes 2013 1 Formulario de Registro para Personas con Diabetes Formulario de Registro para Personas con Diabetes 2013

    E-print Network

    Do Well, Be Well with Diabetes ­ 2013 1 Formulario de Registro para Personas con Diabetes Formulario de Registro para Personas con Diabetes ­ 2013 Si usted NO TIENE diabetes, por favor NO LLENE este sobre diabetes en el Condado de _______________. D. El código postal en mi casa es __ __ __ __ __. E

  18. Do Well, Be Well with Diabetes 2013 1 Formulario de Conclusin para Personas con Diabetes Formulario de Conclusin para Personas con Diabetes 201

    E-print Network

    Do Well, Be Well with Diabetes ­ 2013 1 Formulario de Conclusión para Personas con Diabetes Formulario de Conclusión para Personas con Diabetes ­ 201 Si usted NO TIENE diabetes, por favor NO LLENE este últimos cuatro números de mi número telefónico son __ __ __ __. C. Marque todas las clases sobre diabetes

  19. Amino Acid Synthesis from CO-N2 and CO-N2-H2 Gas Mixtures Via Complex Organic Compounds

    NASA Astrophysics Data System (ADS)

    Miyakawa, S.; Kobayashi, K.; Sawaoka, A. B.

    1999-01-01

    Reaction among hydrogen cyanide (HCN), formaldehyde (H2CO) and ammonia (NH3) are generally considered an important reaction in amino acid synthesis by electric discharge. Precursors of glycine and aspartic acid were, however, synthesized by adding water to metastable complex compounds produced by quenching a CO-N2 high-temperature plasma. In order to investigate effects of water remaining in an experimental vacuum chamber, optical emission spectroscopic and mass spectrometric measurements were conducted with CO-N2 and CO-N2-H2 gas mixtures. Although residual hydrogen atoms were detected in the CO-N2 experiment, the amount of them was much less than that in the CO-N2-H2 experiment

  20. [Modern tribology in total hip arthroplasty: pros and cons].

    PubMed

    Gómez-García, F

    2014-01-01

    The wear products and adverse reactions that occur on bearing surfaces represent one of the greatest challenges in prosthetic replacements, as the latter experience increasing demands due to the large number of young and older adult patients that have a long life expectancy and remarkable activity. The purpose of this review is to analyze the pros and cons of the new advances in the bearing components of the articular surfaces of current total hip arthroplasties. We also discuss the strategies used historically, their problems, results and the surgeon's role in prescribing the tribologic couple that best fits each patient's needs. We conclude with practical recommendations for the prescription and management of the latest articular couples for total hip arthroplasty. PMID:26021098

  1. Obtención de perfiles teóricos de elementos metálicos con velocidades macroscópicas

    NASA Astrophysics Data System (ADS)

    Cirigliano, D.; Costa, A.; Rovira, M.

    El propósito de este trabajo es poder establecer -a partir de la modelización de perfiles de distintas especies- patrones de comparación observacional que permitan caracterizar los fenómenos físicos que están presentes en las estructuras que se observan. Para ello se resuelven las ecuaciones de equilibrio de ionización para un determinado átomo y una atmósfera de parámetros determinados. A partir de ello se definen las poblaciones para los distintos grados de ionización. Considerando distintas configuraciones e intensidades de flujos de masa se deducen la función fuente, el espesor óptico y se calculan los perfiles de las distintas líneas. Se obtuvieron perfiles teóricos de líneas del CII, CIV y del OIV para flujos entrante, saliente y pasante. La forma del perfil, las intensidades relativas entre los distintos flujos y el corrimiento Doppler da cuenta de una caracterización teórica a partir de la cual se comparará con observaciones.

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

    SciTech Connect

    McMillen, K.J. [Beaver Creek Tech. Co., Mason, TX (United States); Do Van Luu; Lee, E.K.; Hong, S.S. [PEDCO, Ho Chi Minh City (Viet Nam)

    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.

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

    SciTech Connect

    McMillen, K.J. (Beaver Creek Tech. Co., Mason, TX (United States)); Do Van Luu; Lee, E.K.; Hong, S.S. (PEDCO, Ho Chi Minh City (Viet Nam))

    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.

  4. Con A-induced suppressor cells in children with acute lymphoblastic leukaemia.

    PubMed Central

    Eibl, M; Krepler, P; Schmidmeier, W; Zielinski, C; Winterleitner, H

    1980-01-01

    The function of Con A stimulation was investigated in patients with ALL in remission and in patients with ALL in the acute phase of the disease as compared to healthy controls. Suppression of the Con A response brought about by autologous Con A-activated cells was significantly lower in ALL patients in remission (mean value 29.33%) and in the acute phase (mean value 10%) than in the controls (mean value 64.86%). Suppression of the Con A stimulation of control lymphocytes by Con A-activated homologous cells of ALL patients had a mean value of 51.65%. This was significantly higher than the suppression obtained by the same ALL cells in the autologous system and of the same order of magnitude as the suppression obtained by control Con A-activated cells on control Con A stimulation (57.67%). Suppression of the Con a response of ALL lymphocytes produced by control Con A-activated cells was 23.17% and comparable to healthy controls. These results demonstrate that the function of Con A-induced suppression is significantly lower in ALL patients. They further indicate that at least two cell types are involved in this kind of suppression in humans. PMID:6448114

  5. Range Con: a management evaluation system for assessing sucess of selected range improvement practices

    E-print Network

    Ekblad, Steven Linn

    1989-01-01

    Knowledge Representation Procedure. Knowledge Acquisition Procedure. Validation Procedure. 12 15 20 Modeling Qualitative Judgement. 22 TABLE OF CONTENTS Continued DEVELOPMENT OF RANGE CON. Phase 1 ? Prototype Phase 2 ? Prototype. Range Con... System Planning Model 2. Range Con knowledge acquisition and knowledge- base flow chart development procedure. 17 3. Algorithm for combination of rule certainty factors in inexact reasoning model (adapted from Buchanan and Shortliffe 1985) 24 4...

  6. 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.

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

    Microsoft Academic Search

    Joachim D. Pleil

    2011-01-01

    Background This was the second year that our breath colleagues organized a networking session at the Pittsburgh Conference and Exposition, or 'PittCon' (www.pittcon.org\\/). This time it was called 'Non Invasive Biomedical Analysis' to broaden the scope a bit, but the primary focus remained on exhaled breath diagnostics. As reported last year in the Journal of Breath Research, PittCon continues to

  8. MEETING REPORT Breath Biomarkers Networking Sessions at PittCon 2010, Orlando, Florida Breath Biomarkers Networking Sessions at PittCon 2010, Orlando, Florida

    Microsoft Academic Search

    Joachim D. Pleil

    2010-01-01

    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 1000 commercial exhibitors. PittCon began in 1950 as a small spectroscopy and analytical chemistry gathering and, as the name implies, originated in Pittsburgh, PA. The conference has outgrown its humble beginnings and is

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

    Cancer.gov

    Los familiares proporcionan la gran mayoría de los cuidados de las personas con cáncer. Un programa educativo del City of Hope Cancer Center 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.

  10. EL RAZONAMIENTO PROPORCIONAL EN ALUMNOS DE 7º GRADO CON DIFERENTES EXPERIENCIAS CURRICULARES 1

    Microsoft Academic Search

    David Ben-Chaim; James Fey; William Fitzgerald; Catherine Benedetto; Jane Miller

    Se presentaron problemas contextualizados que envuelven números racionales y razonamiento proporcional a alumnos de 7° con diferentes experiencias curriculares. Hay fuerte evidencia de que los estudiantes en la reforma curricular, quienes son estimulados a construir sus propios conceptos y procedimientos de proporcionalidad a través de trabajo colaborativo de resolución de problemas, tuvieron un mejor desempeño que los estudiantes con un

  11. Control contextual en el aprendizaje de números para un niño con discapacidad intelectual

    Microsoft Academic Search

    Francisco J. Alós

    2007-01-01

    El objetivo de este estudio fue la enseñanza de la discriminación «igual» y «diferente» en números. Se describe un experimento efectuado con un niño de siete años con discapacidad intelectual. El proble- ma fue analizado desde la perspectiva del control contextual. El procedimiento de aprendizaje consis- tió en la enseñanza explícita de una discriminación condicional de segundo orden y se

  12. Per: Chirapaq celebra 25 aos con un foro sobre "Derechos de los Pueblos Indgenas"

    E-print Network

    Islas, León

    Perú: Chirapaq celebra 25 años con un foro sobre "Derechos de los Pueblos Indígenas celebrará su 25 aniversario con el foro público internacional: "Derechos de los Pueblos Indígenas: Avances y la Nación Cree, ex parlamentario y miembro del Mecanismo de Expertos sobre los Derechos de los

  13. Table of ConTenTs -Temp 2 Message from the President

    E-print Network

    Indiana University

    Cial RepoRT 2009­10 Table of ConTenTs 2 Message from the President 6 Message from the Vice President#12;#12;1 Table of ConTenTs -Temp 2 Message from the President 7 Message from the Vice President and Chief Financial Officer 9 Independent Auditors' Report 10 Management's Discussion and Analysis 18

  14. 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

  15. Resolution of Con icts Involving Many Aircraft via Semide nite Programming

    E-print Network

    Feron, Eric

    Resolution of Con icts Involving Many Aircraft via Semide nite Programming E. Frazzoli Z.-H. Mao y J.-H. Oh z E. Feron x April, 1999 Abstract Aircraft con ict detection and resolution is currently question: Given a set of airborne aircraft and their intended trajectories, what control strategy should

  16. CPR: A Con guration Pro ling Tool Srihari Cadambiand Seth Copen Goldsteiny

    E-print Network

    Goldstein, Seth Copen

    CPR: A Con guration Pro ling Tool Srihari Cadambiand Seth Copen Goldsteiny Carnegie Mellon tool CPR and show how it can be used to aid compiler designers, FPGA architects and in the con- struction of a macro-generator libraries. CPR uses subgraph matching to identify the parts of an ap

  17. 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...

  18. Teorías y doctrina sobre las relaciones del derecho con la economía

    Microsoft Academic Search

    William Leguizamón Acosta

    2004-01-01

    A partir de la conformación definitiva de la Economía como ciencia autónoma; hecho sucedido a partir de la obra de ADAM SMITH “sobre la naturaleza y riqueza de las Naciones” se ha venido discutiendo con intensidad sobre las estrechas relaciones que esta disciplina mantiene con el Derecho. Algunos abordan el tema bajo condiciones de dominio de una ciencia sobre la

  19. Resolving con icts in collaborative human-computer interaction (extended abstract)

    E-print Network

    Resolving con icts in collaborative human-computer interaction (extended abstract) Robert St. Amant softwareagentsand human agents. Our discus- sion is drawn mainly from research in human-computer interaction (HCI in autonomous agents research. Managing con icts in human-computer interaction poses a set of challenges beyond

  20. conStruction MAnAgeMent College of Rural and Community Development

    E-print Network

    Hartman, Chris

    conStruction MAnAgeMent College of Rural and Community Development Community and Technical College The construction management program meets growing needs in the con- struction industry by training entry-level construction managers and by providing continuing education for construction employees. Construction managers

  1. Taller de espacios de Banach Reticulos de Banach con la propiedad de Kato

    E-print Network

    Taller de espacios de Banach Reticulos de Banach con la propiedad de Kato Resumen: Se estudian retículos de Banach y espacios de funciones de reordenamiento invariante E con la propiedad de que las Estructura de Espacios de Banach (MTM2012-31286) Francisco L. Hernández UCM #12;

  2. Diventa Social Media Trainer Aumenta le tue possibilit occupazionali con competenze Web 2.0 e

    E-print Network

    Robbiano, Lorenzo

    Diventa Social Media Trainer · Aumenta le tue possibilità occupazionali con competenze Web 2.0 e marketing. Perché partecipare: · Riceverai una Formazione per diventare un Social Media Trainer formative, aiutando un membro dello staff aziendale a familiarizzare con gli strumenti Social Media. Questo

  3. On the Formal Veri cation of the TCAS Con ict Resolution Algorithms 1

    E-print Network

    Lynch, Nancy

    On the Formal Veri cation of the TCAS Con ict Resolution Algorithms 1 John Lygeros and Nancy Lynch 02139 lygeros, lynch@lcs.mit.edu Abstract TCAS is an on-board protocol for detecting con icts between aircraft and providing resolution advisories to the pilots. Because of its safety-critical role the TCAS

  4. 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 Science Ltd. All rights reserved. Keywords: Ballistic penetration; Damage; Fragmentation; Interferometry is one of the most important material properties that in¯uence its ballistic performance and motivated

  5. Accesibilidad para personas con debilidad motriz ASIC 18 de noviembre de 2010 Pg. 1 de 17

    E-print Network

    Fernández de Córdoba, Pedro

    Accesibilidad para personas con debilidad motriz Windows 7 ASIC ­ 18 de noviembre de 2010 Pág. 1 de;Accesibilidad para personas con debilidad motriz Windows 7 ASIC ­ 18 de noviembre de 2010 Pág. 2 de 17 Windows 7 ASIC ­ 18 de noviembre de 2010 Pág. 3 de 17 Figura 1-Centro de accesibilidad -Figura 2-Teclado

  6. Accesibilidad para personas con debilidad auditiva ASIC 18 de noviembre de 2010 Pg. 1 de 4

    E-print Network

    Fernández de Córdoba, Pedro

    Accesibilidad para personas con debilidad auditiva Windows XP ASIC ­ 18 de noviembre de 2010 Pág. 1 debilidad auditiva Windows XP ASIC ­ 18 de noviembre de 2010 Pág. 2 de 4 Utilizando el ratón 3 En el cuadro). Utilizando el ratón #12;Accesibilidad para personas con debilidad auditiva Windows XP ASIC ­ 18 de noviembre

  7. Accesibilidad para personas con debilidad visual ASIC 18 de noviembre de 2010 Pg. 1 de 12

    E-print Network

    Fernández de Córdoba, Pedro

    Accesibilidad para personas con debilidad visual Windows 7 ASIC ­ 18 de noviembre de 2010 Pág. 1 de accesibilidad haga Intro sobre la Lupa : #12;Accesibilidad para personas con debilidad visual Windows 7 ASIC Windows 7 ASIC ­ 18 de noviembre de 2010 Pág. 3 de 12 Ctrl+Alt+R Tecla del logotipo de Windows +Esc

  8. 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 ocupan hoy en día. Hablamos de un nuevo prototipo de sistema de carga para el iPhone, con el que se

  9. ConSurf 2010: calculating evolutionary conservation in sequence and structure of proteins and nucleic acids

    PubMed Central

    Ashkenazy, Haim; Erez, Elana; Martz, Eric; Pupko, Tal; Ben-Tal, Nir

    2010-01-01

    It is informative to detect highly conserved positions in proteins and nucleic acid sequence/structure since they are often indicative of structural and/or functional importance. ConSurf (http://consurf.tau.ac.il) and ConSeq (http://conseq.tau.ac.il) are two well-established web servers for calculating the evolutionary conservation of amino acid positions in proteins using an empirical Bayesian inference, starting from protein structure and sequence, respectively. Here, we present the new version of the ConSurf web server that combines the two independent servers, providing an easier and more intuitive step-by-step interface, while offering the user more flexibility during the process. In addition, the new version of ConSurf calculates the evolutionary rates for nucleic acid sequences. The new version is freely available at: http://consurf.tau.ac.il/. PMID:20478830

  10. Titolo Breve descrizione N. tirocini Titolo studio Conoscenze specifiche Comunicazione con interventi

    E-print Network

    Robbiano, Lorenzo

    progetto "Genova Smart City per i giovani" iniziato nel 2012 con l'obiettivo di diffondere il modello di percorso, collaborando inoltre nei 3 progetti europei Smart Cities and Communities "Transform" - "R2 Cities

  11. Qu sucede con esta imagen? Crculo las diez cosas mal en la

    E-print Network

    limpio #12;¿Qué sucede con esta imagen? -"Servir comida segura" Clave 1. Caliente explotación por debajo lugar en la tabla que no se han eliminado 6. Un alimento no tiene sus propios utensilios de servir en el

  12. Tensión postraumática relacionada con el cáncer–para profesionales de salud (PDQ®)

    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.

  13. Courses: Economics (ECON) Page 291Sonoma State University 2010-2011 Catalog eCOn 321 lABOr eCOnOMiCS (4)

    E-print Network

    Ravikumar, B.

    history, market structure, labor laws, gender and race, education and training, and collective bargaining, consumers, labor and government. Topics include: constitutional law, administrative law, regulation of monopoly and competition, labor law and international law. Prerequisite: ECON 204 or 205. eCOn 403 Se

  14. Estudio de los NIH señala una relación de la tomografía computarizada (TC) en la infancia con leucemia y con 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 posterior a su primera tomografía.

  15. NSF funds iCons and HCC interdisciplinary renewable energy labs The campus' Integrated Concentration in Science (iCons) program and

    E-print Network

    Auerbach, Scott M.

    NSF funds iCons and HCC interdisciplinary renewable energy labs The campus' Integrated Foundation (NSF) funding. These new courses will provide undergraduate students the opportunity will use the NSF award to purchase equipment and develop teaching strategies for their parallel renewable

  16. Range Con: a management evaluation system for assessing sucess of selected range improvement practices 

    E-print Network

    Ekblad, Steven Linn

    1989-01-01

    RANGE CON: A MANAGEMENT EVALUATION SYSTEM FOR ASSESSING SUCCESS OF SELECTED RANGE IMPROVEMENT PRACTICES A Thesis by STEVEN LINN EKBLAD Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment... of the requirements for the degree of MASTER OF SCIENCE August 1989 Major Subject: Range Science RANGE CON: A MANAGEMENT EVALUATION SYSTEM FOR ASSESSING SUCCESS OF SELECTED RANGE IMPROVEMENT PRACTICES A Thesis by STEVEN LINN EEBLAD Approved as to style...

  17. HIPNOSIS APLICADA A NIÑOS QUEMADOS CON DIAGNÓSTICO DE SÍNDROME DE ESTRÉS POST-TRAUMÁTICO 1

    Microsoft Academic Search

    Walter Vargas

    2004-01-01

    El Síndrome de Estrés Post-traumático (S.E.P.T.), diagnosticado en cinco niños quemados fue tratado con la técnica hipnótica, obteniéndose resultados satisfactorios, y de valiosa consideración teórica. Se diseñó un procedimiento a tres pasos, para identificar y abordar con la técnica hipnótica el trauma psíquico: primero, el Escenario Traumático (E.T.); segundo, Inventario de los Elementos del Escenario (I.E.E.); tercero, Dinámica de los

  18. Lupus eritematoso sistemico: un caso di difficile diagnosi differenziale con forme infettive

    Microsoft Academic Search

    L. BIANCHI; S. BALLOTTI; F. G RISOLIA; S. C ASALINI; G. SALVI M. DI MARIA; G. C ALABRI; M. DE MARTINO

    2001-01-01

    purpurica, diffuse a tutto il corpo, compresi palmo delle mani e pianta dei piedi. È presente linfoadenopa- tia laterocervicale bilaterale, con linfoghiandole non dolenti, mobili, di 1-2 cm di diametro. Alla palpa- zione dell'addome si evidenzia epa- tosplenomegalia marcata con en- trambi gli organi debordanti tre dita dall'arcata costale. Gli esami ematici eseguiti all'in- gresso (Tab. I) mostrano aumento della

  19. Breath Biomarkers Networking Sessions at PittCon 2010, Orlando, Florida

    Microsoft Academic Search

    Joachim D Pleil

    2010-01-01

    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 1000 commercial exhibitors. PittCon began in 1950 as a small spectroscopy and analytical chemistry gathering and, as the name implies, originated in Pittsburgh, PA. The conference has outgrown its humble beginnings and is

  20. 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.

  1. 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.

  2. [Índice de Saturación Modificado (ISM) in emergency rooms. Another index else?].

    PubMed

    Kaneko-Wada, Francisco Takao

    2015-01-01

    Respetable editor: Quienes vivimos la sobrecarga de trabajo en los Servicios de Urgencias de forma subjetiva podemos determinar si existe saturación o no. La creación de diversos índices de saturación tiene como objetivo determinar, basándose en hechos, el grado de saturación, para dar inicio a una serie de acciones y protocolos para implementar una respuesta estratégica a cada «grado de alerta», como la reconversión hospitalaria, la suspensión de cirugías electivas y la agilización del egreso de los pacientes a fin de tener disponibilidad de camas, entre otras acciones. PMID:26089281

  3. 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

  4. L'altro, invece, fu importante per i contatti con l'elite culturale giapponese, nella fattispecie per gli articoli sul ??? ??? ??? ???-Bushido , ed i suoi rapporti con il

    Microsoft Academic Search

    Inazo Nitobe; Phra Mongkut

    ???????????????????????????????????? , ritenuto l'antesignano della modernizzazione del paese, il quale intraprese la via di un avvicinamento con l'Occidente al fine di preservarne l'indipendenza politica, culturale e spirituale. A tale scopo egli impose una modifica dello stile di vita, negli abiti, nell'architettura, favorendo lo studio della lingua inglese e l'acquisizione della tecnologia occidentale. Da parte nostra, prendendo spunto da questi studi

  5. Presencia de movimientos chiítas en América Latina: Su relación con los atentados de Buenos Aires (1992, 1994) y con el eje Caracas-Teherán

    Microsoft Academic Search

    Isaac Caro

    2011-01-01

    Resumen:Este trabajo tiene por objetivo examinar la presencia de movimientos chiítas radicales en América Latina, algunos de ellos comprometidos en acciones violentas, especialmente en dos zonas geográficas. Primero, en la denominada triple frontera de Argentina, Paraguay y Brasil, presencia vinculada con los atentados contra la embajada de Israel en 1992 y contra la Asociación Mutual Israelita Argentina en 1994, ambos

  6. Soluciones analiticas AL problema de jets con velocidad de eyeccion variable EN EL tiempo.

    NASA Astrophysics Data System (ADS)

    Canto, J.; Raga, A. C.; D'Alessio, P.

    1998-11-01

    Se presenta un nuevo metodo que permite resolver de manera exacta y analitica las ecuaciones que describen un jet hipersonico con velocidad de eyeccion variable en el tiempo. El metodo se basa en consideraciones sencillas de conservacion de momento para las superficies de trabajo que se forman en el interior del jet. Como ejemplo, se presentan soluciones para jets con variacion sinusoidal en la velocidad de eyeccion, y tambien para el caso de un incremento lineal en el tiempo. Estas soluciones analiticas tienen una clara aplicacion en la interpretacion de las observaciones de jets asociados a objetos Herbig-Haro.

  7. GeConT 2: gene context analysis for orthologous proteins, conserved domains and metabolic pathways

    PubMed Central

    Martinez-Guerrero, C. E.; Ciria, R.; Abreu-Goodger, C.; Moreno-Hagelsieb, G.; Merino, E.

    2008-01-01

    The Gene Context Tool (GeConT) allows users to visualize the genomic context of a gene or a group of genes and their orthologous relationships within fully sequenced bacterial genomes. The new version of the server incorporates information from the COG, Pfam and KEGG databases, allowing users to have an integrated graphical representation of the function of genes at multiple levels, their phylogenetic distribution and their genomic context. The sequence of any of the genes can be easily retrieved, as well as the 5? or 3? regulatory regions, greatly facilitating further types of analysis. GeConT 2 is available at: http://bioinfo.ibt.unam.mx/gecont. PMID:18511460

  8. Science for conServation 293 Loss of genetic diversity and

    E-print Network

    Jamieson, Ian

    bird species #12;Loss of genetic diversity and inbreeding in New Zealand's threatened bird species Ian. 59 p. Loss of genetic diversity and inbreeding in New Zealand's threatened bird species Ian GScience for conServation 293 Loss of genetic diversity and inbreeding in New Zealand's threatened

  9. 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

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

    E-print Network

    Guidoni, Leonardo

    A Bando RTD n. 02/2014 Il Direttore del Dipartimento di Fisiologia e Farmacologia "Vittorio Erspamer Fisiologia e Farmacologia "Vittorio Erspamer" di n. 1 posto di ricercatore con rapporto di lavoro a tempo economica della quota di competenza a carico del Dipartimento di Fisiologia e Farmacologia "Vittorio

  11. Studies of Global Stability of Field-Reversed Con guration Plasmas Using A Rigid Body Model

    E-print Network

    Studies of Global Stability of Field-Reversed Con guration Plasmas Using A Rigid Body Model H. Ji guration FRC plasmas has been stud- ied using a simple rigid body model in the parameter space of s ratio equation of motion for each global mode is formulated and analyzed using a rigid body model of the FRC

  12. In my last column I explained why I think full-fledged business-to-con-

    E-print Network

    In my last column I explained why I think full-fledged business-to-con- sumer e-commerce (B2C is currently the more difficult of the two. The reasons are twofold. One, B2C e-commerce product specifications computations for managing the manufacturing and logistics neces- sary to efficiently satisfy B2C requirements

  13. 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.

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

    E-print Network

    was to study the effect of the physical conditions on the oyster and oyster larvre in this typical location. These studies were conducted under the direction of Dr. Paul S. Galtsoff, in charge of oyster investigationsINVESTIGATION OF THE PHYSICAL CONDITIONS CON- TROLLING SPAWNING OF OYSTERS AND THE OCCUR- RENCE

  15. Maximum Stable Throughput of FS-ALOHA under Delay Con-B. Van Houdt

    E-print Network

    Maximum Stable Throughput of FS-ALOHA under Delay Con- straints B. Van Houdt and C. Blondia. This paper studies the maximum stable throughput of FS-ALOHA, a random access algorithm for dynamic bandwidth factor in the QoS provisioning. Although Slotted ALOHA is easy to implement in such an environment

  16. CONTRIBUTI ALL'ATTIVITÀ PRENORMATIVA NEL CAMPO DEL CONSOLIDAMENTO STRUTTURALE CON MATERIALI COMPOSITI FIBRORINFORZATI

    Microsoft Academic Search

    L. Ascione; L. Feo

    Sommario La presente memoria contribuisce a diffondere i risultati dell'attività prenormativa spontanea svolta da alcuni docenti dei settori della Scienza e della Tecnica delle Costruzioni nel campo del consolidamento strutturale con materiali compositi fibrorinforzati (FRP). Tale attività ha portato alla redazione del documento tecnico CNR-DT 200\\/2004 dal titolo: \\

  17. HÁBITOS DE ESTUDIO, ACTITUDES Y AUTOESTIMA RELACIONADOS CON RENDIMIENTO ACADÉMICO EN ESTUDIANTES DE ENFERMERÍA

    Microsoft Academic Search

    Fabiola Cruz Núñez

    2010-01-01

    Determinar la relación que existe entre hábitos de estudio, actitudes y autoestima con el rendimiento académico de los estudiantes de la Facultad de Enfermería de la Universidad Veracruzana. METODOLOGÍA: Diseño de investigación descriptivo, correlacional. La población estuvo constituida por 377 estudiantes inscritos durante el periodo Febrero – Julio, 2010. El tipo de muestreo fue probabilístico estratificado; la muestra fue de

  18. |September 2004| SPIE's oemagazine |25 enses are key elements of optical systems. Most con-

    E-print Network

    Wu, Shin-Tson

    |September 2004| SPIE's oemagazine |25 L enses are key elements of optical systems. Most con- ventional lenses are made of glass, polymer, or other transparent solid materials. These lenses have fixed focus. To tune the focal length continuously, optical design- ers have developed the zoom lens, which

  19. Comparación entre un arrancador electrónico diseñado con IGBT's y un arrancador electrónico comercial

    Microsoft Academic Search

    M. C. Gabriel; Domínguez Sánchez; Mario Salvador; Esparza González

    Resumen. En este artículo se presenta una comparación entre un arrancador electrónico de estado sólido diseñado para motores trifásicos en el Instituto Tecnológico de A guascalientes basado en IGBT's (Transistores Aislados por Compuerta) con una propuesta de disparo, se presenta el diseño del arrancador, los resultados obte nidos y la respuesta para las mismas condiciones de opera ción de un

  20. Capacidad reproductiva de Pinus nigra subsp. salzmannii en relacin con la edad de la planta madre

    E-print Network

    Herrera, Carlos M.

    Capacidad reproductiva de Pinus nigra subsp. salzmannii en relación con la edad de la planta madre fertilidad del pino salgareño (Pinus nigra subsp. salzmannii) conforme los árboles envejecen. La fertilidad bosques de montaña del sur de Europa. Palabras clave: Pinus nigra, fertilidad, senescencia de las plantas

  1. DIGITAL.CSIC: "Catalogacin con Dublin Core, gestin de derechos de

    E-print Network

    DIGITAL.CSIC: "Catalogación con Dublin Core, gestión de derechos de autor y permisos de editores;Copyright y el acceso abierto #12;¿De qué estamos hablando? · Derechos de autor: conjunto de normas y principios que regulan los derechos morales y patrimoniales que la ley concede a los autores por el solo

  2. Mul$-scale Demand-Side Management for Con$nuous Power-intensive Processes

    E-print Network

    Grossmann, Ignacio E.

    and uncertainty in prices · Timing and produc(on quan((es (DR)* · Inventory management inventory facilitate performing Demand-side Management (DSM) at air separa$on plants1 Mul$-scale Demand-Side Management for Con$nuous Power-intensive Processes

  3. Both methods made the cells sensitive to drug-induced apoptosis (Fig. 1b, c). Con-

    E-print Network

    Chapman, Clark R.

    Both methods made the cells sensitive to drug-induced apoptosis (Fig. 1b, c). Con- versely a partial reversion to normal glandular structures, which then were resistant to apoptosis (Fig. 1a, b with abnormal anchorage to the basement membrane did not protect against apoptosis. Interestingly, however

  4. PROCESSING IN THE ENCRYPTED DOMAIN USING A COMPOSITE SIGNAL REPRESENTATION: PROS AND CONS

    E-print Network

    PROCESSING IN THE ENCRYPTED DOMAIN USING A COMPOSITE SIGNAL REPRESENTATION: PROS AND CONS Tiziano proposed that allows to speed up linear operations on encrypted signals via parallel processing and to reduce the size of the encrypted signals. Though many of the most common sig- nal processing operations

  5. 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

  6. El Reto de Vincular a los Pequeños Productores de Papa con la Agroindustria

    Microsoft Academic Search

    Thomas Bernet; Martín Lara; Pedro Urday; André Devaux

    Resumen El aumento del consumo de papa procesada está permitiendo que la agricultura por contrato gane importancia. Los pequeños productores de papa podrían aprovechar esta modalidad para superar sus dificultades en la comercialización, accediendo a un mercado seguro con precios rentables y estables. No obstante, la literatura revisada y un caso específico de la Sierra Central del Perú demuestran que

  7. 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

  8. HEP/123-qed Precessing Domains and Castaing Instability in Conned Alkali

    E-print Network

    Meyerovich, Alex

    HEP/123-qed Precessing Domains and Castaing Instability in ConÞned Alkali Gases A. Kuklov textdate; Published textdate) Abstract We explore analogy between two-component quantum alkali gases of these effects for alkali gases and make suggestions for new types of experiments including the observation

  9. Aplicacin del paradigma CellDEVS binario con tiempo para modelado y simulacin de sistemas

    E-print Network

    Wainer, Gabriel

    Aplicación del paradigma Cell­DEVS binario con tiempo para modelado y simulación de sistemas verificación de los modelos. De esta forma se puede lograr el desarrollo eficiente y reducido en costo de soluciones de simulación para estos sistemas. Keywords: Simulación a Eventos Discretos, Modelado, espacios de

  10. ^O l ll ORNL/CON-125 Design Options to Test the

    E-print Network

    Oak Ridge National Laboratory

    ^O l ll ORNL/CON- 125 A 5 A Design Options to Test the Effects of Financial CARBIDE Incentives THE EFFECTS OF FINANCIAL INCENTIVES IN A UTILITY CONSERVATION PROGRAM: TVA'S HEAT PUMP WATER HEATER PROGRAM Comparisons ............... 25 2.3.2 One Way Layout Design .............. 26 3. DISTRIBUTOR LEVEL ASSIGNMENT

  11. The Value of Literacy Beyond Reading: Empowering Adult Women Through Knowledge and Con...dence

    E-print Network

    Bandyopadhyay, Antar

    The Value of Literacy Beyond Reading: Empowering Adult Women Through Knowledge and Con funded by the Social Science Research Council of Canada. 1 #12;Abstract Adult female literacy around the world to institute large scale adult literacy programs. However, evidence on the e

  12. On the Detection of Con icts in Diagnostic Bayesian Networks Using Abstraction

    E-print Network

    Valtorta, Marco

    On the Detection of Con icts in Diagnostic Bayesian Networks Using Abstraction Young-Gyun Kim Bayesian net- work (the base model) and constructs, with- out assistance, a bipartite network to be used and imple- mented. 1 INTRODUCTION Developing a diagnostic expert system that uses a Bayesian network

  13. MODELO LINGSTICO DE TOMA DE DECISIONES MULTICRITERIO CON EXPRESIONES LINGSTICAS COMPARATIVAS

    E-print Network

    Granada, Universidad de

    #12;#12;#12;#12;#12;#12;MODELO LINGÜÍSTICO DE TOMA DE DECISIONES MULTICRITERIO CON EXPRESIONES. Posteriormente, presentamos un mode- lo lingüístico de toma de decisiones multicriterio que utiliza dichas lingüísticas comparativas, conjunto de términos lingüísticos difusos dudosos, toma de decisiones multicriterio

  14. LIXIVIACIÓN DE MENAS AURÍFERAS CON SALES OXIDANTES EN MEDIO ÁCIDO MEDIANTE EL PROCESO SEVERO

    Microsoft Academic Search

    Palacios C. Severo

    El trabajo de Lixiviación se desarrolla en Menas, Concentrados y Material Refractario (sulfurado), en pulpa o partículas (agitación o pilas) a temperatura ambiente con tiempo de lixiviación máximo de doce horas, usando como medio lixiviante el ácido sulfúrico concentrado adicionado sales oxidantes como los cloruros y nitrato de sodio o nitrato de amonio en distintas proporciones. Los resultados obtenidos respecto

  15. Sobre Como Varian las Firmas Manuscritas con el Tiempo: una Modelizacion Sigma Lognormal

    E-print Network

    Autonoma de Madrid, Universidad

    de edad basado en los par´ametros del modelo. 1 Introducci´on Como en cualquier nuevo ´area de- conocimiento, con el objetivo de conseguir menores tasas de error. Como conse- cuencia, se han pasado por alto nueva aproximaci´on para el estudio de firmas pertenecientes a grupos de edades dis- tintas. #12;La

  16. ¿POR QUE COMENZAR CON UN INGRESO CIUDADANO PARA LOS MENORES EN AMERICA LATINA?

    Microsoft Academic Search

    Alberto C. Barbeito; Rubén M. Lo Vuolo

    La característica central de todas las nociones afines con el concepto de ingreso básico o ingreso ciudadano (IC) es que se refieren a un arreglo institucional que garantiza cierta forma de ingreso incondicional a las personas, esto es, un ingreso para cuyo acceso no se requiere ninguna otra condición personal que la de ser ciudadano. Por ejemplo, no se requiere

  17. IMPLICACIONES DEL MODELO DE ENSEÑANZA NATURAL DEL LENGUAJE EN LA INTERVENCION DE PERSONAS CON AUTISMO

    Microsoft Academic Search

    Pedro Gortázar

    Equipo CEPRI RESUMEN: El Modelo de Tratamiento Natural del Lenguaje constituye el para- digma de intervención actualmente más válido para hacer frente a los déficits sociales y comunicativos de las personas con autismo. En esta ponencia se discuten las implicaciones de este Modelo de cara a la formu- lación de objetivos curriculares, definición de criterios de respuesta, técnicas de entre-

  18. iCon: Utilizing Everyday Objects as Additional, Auxiliary and Instant Tabletop Controllers

    E-print Network

    Ouhyoung, Ming

    circumstances, low engagement with selected objects, and medium-to-high frequency of use. The proposed apiCon: Utilizing Everyday Objects as Additional, Auxiliary and Instant Tabletop Controllers Kai of users as additional, auxiliary, and instant tabletop controllers. Based on this approach, a prototype

  19. RESUMEN: El abandono de las formas indgenas y tradicionales de relacionarse con

    E-print Network

    Paris-Sud XI, Université de

    a V E : Tecnologías indígenas, arqueología, desarrollo sostenible, agricultura, pastoreo, silvicultura modelos de desarrollo que responden a exigencias foráneas. Los estudios sociales han integrado el concepto de desarrollo en sus análisis con diferentes enfoques y aplicaciones, pese a que persiste la

  20. Bayesian-network Con rmation of Software Testing Uncertainties Debra J. Richardson

    E-print Network

    Ziv, Hadar

    networks to con rm beliefs in the validity of software artifacts and relations in an elevator control, such as described for the Therac-25 medical radiation device LT93 or else reported, for example, in the comp unexplored with notable exception of software reliability models Lit79 and validation of software

  1. I JORNADAS SOBRE TRASTORNO DE DFICIT DE ATENCIN CON/SIN HIPERACTIVIDAD. CONOCIENDO EL

    E-print Network

    Rey Juan Carlos, Universidad

    I JORNADAS SOBRE TRASTORNO DE DÉFICIT DE ATENCIÓN CON/SIN HIPERACTIVIDAD. CONOCIENDO EL TDAH PARA SU CORRECTA INTERVENCIÓN EN EL AULA Si existe un trastorno infantil que desborda la atención de los profesores y que afecta al desarrollo normal de cualquier aula de clase es el Trastorno por Déficit de

  2. Derivaciones perezosas en Programaci'on L'ogica con restricciones ecuacionales*

    E-print Network

    Alpuente, María

    bajo una teor'ia de la igualdad presentada como una teor'ia ecuacional de Horn E [1* *, 2]. CLP sobre la estructura X con la que se parametriza el esquema. El concepto de estructura especifica el.e. la partici'on m'as fina inducida por una teor'ia de la igualdad E sobre el* * Universo de Herbrand H

  3. DESign AnD conStruction College of Engineering and Mines

    E-print Network

    Hartman, Chris

    DESign AnD conStruction MAnAgEMEnt College of Engineering and Mines Department of Civil for Certificate: 15 credits The graduate certificate in design and construction management is de- signed in the construction industry. The program was designed in collaboration with construction industry em- ployers

  4. ConAir: Featherweight Concurrency Bug Recovery Via Single-Threaded Idempotent Execution

    E-print Network

    Lu, Shan

    ConAir: Featherweight Concurrency Bug Recovery Via Single-Threaded Idempotent Execution Wei Zhang1 of Wisconsin­Madison 2Google, Inc {wzh,dekruijf,ali28,shanlu,karu}@cs.wisc.edu Abstract Many concurrency bugs that help software survive hidden concurrency bugs during production runs. To help developers, we need

  5. State based protocols are protocols in which the handling of one message depends on the con-

    E-print Network

    Dean, Thomas R.

    on the con- tents of previous messages. Testing such proto- cols, for security or for other purposes usually to evalu- ate the security of an implementation. One ap- proach that can be adapted is Syntax Testing [2 messages to test the security of a given applica- tion. However before sending multiple mutated versions

  6. PARA ACABAR CON LA VERDAD-DEMOSTRACION. BACHE,LARD, CANGUILHEM, FOUCAULT

    E-print Network

    Paris-Sud XI, Université de

    and the scope of Michel Foucault's uhistory of truthr, i.e. his history of the relationship between truth, power gouuernement des uiuants, 30.01.80) Uno de los principales objetivos de la reflexión del último Michel FoucaultPARA ACABAR CON LA VERDAD-DEMOSTRACION. BACHE,LARD, CANGUILHEM, FOUCAULT Y LA HISTOzuA DE, LOS (RE

  7. Razonamiento automtico en programacin genrica con ACL2: estudio de un caso

    E-print Network

    Alonso, José A.

    Razonamiento automático en programación genérica con ACL2: estudio de un caso I. Medina BuloÝ , J estudio de un caso de razonamiento formal sobre programas genéricos en ACL2. En él aparecen (entre otras genéricos, ACL2 Resumen En este artículo se estudia un caso de formalización y demostración automática en

  8. ConText: An algorithm for determining negation, experiencer, and temporal status from clinical reports

    Microsoft Academic Search

    Henk Harkema; John N. Dowling; Tyler Thornblade; Wendy Webber Chapman

    2009-01-01

    In this paper we describe an algorithm called ConText for determining whether clinical conditions mentioned in clinical reports are negated, hypothetical, historical, or experienced by someone other than the patient. The algorithm infers the status of a condition with regard to these properties from simple lexical clues occurring in the context of the condition. The discussion and evaluation of the

  9. 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

  10. he quantum behavior change paradigm con-siders the possibility that health behavior

    E-print Network

    Plaut, David C.

    constraint satisfaction artificial neural network) and tested whether the model exhibited quantum404 T he quantum behavior change paradigm con- siders the possibility that health behavior may a novel analysis of the quantum behavior change para- digm that generated several implications for health

  11. ESPACIOS DE TRABAJO DE KNOWCAT Los usuarios pueden trabajar con el sistema en los siguientes espacios

    E-print Network

    Cobos, Ruth

    APÉNDICE A ESPACIOS DE TRABAJO DE KNOWCAT Los usuarios pueden trabajar con el sistema en los siguientes espacios: 1. Espacio de Conocimiento: espacio que permite a los usuarios trabajar en la gestión del conocimiento del grupo. 2. Espacio de Comunidad de Usuarios: espacio que proporciona a los

  12. INSTRUMENTOS PARA EL DESARROLLO Y LA DINAMIZACIN DE CIUDADES Y ESPACIOS CON

    E-print Network

    Escolano, Francisco

    INSTRUMENTOS PARA EL DESARROLLO Y LA DINAMIZACIÓN DE CIUDADES Y ESPACIOS CON PATRIMONIO HISTÓRICO aplicación incluya todos los espacios naturales, las áreas urbanas, periurbanas y rurales así como el litoral interesantes beneficios económicos y socio-laborales a los espacios que se desarrollen en su sector, deben

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

    E-print Network

    , generando una mayor Con-Ciencia y responsabilidad social. Así esta vivienda de 80 metros cuadrados de vivienda que ofreciera un espacio digno, durable y sustentable en la eficiencia de los recursos naturales sus 8 hijos cambió radicalmente. El proyecto de vivienda semilla nace de un convenio tripartita

  14. Yang-Baxter Invariants for Line Con gurations Department of Mathematics and Computer Science

    E-print Network

    Penne, Rudi

    , the diagrams of isotopic line con#12;gurations can be connected by means of diagram moves #18;a la Reidemeister matrix with respect to a #12;xed basis. Let dim(V ) = n. A labeling of a line diagram is a choice out the opportunity to use two matrices, (#26; ab cd ) and (#26; ab cd ). For each diagram labeling we can multiply

  15. ELEMENTOS TEÓRICOS PARA LA CONSTRUCCIÓN DE INDICADORES DE GÉNERO RELACIONADO CON PROYECTOS

    Microsoft Academic Search

    Raiza Trapote Fernández; Iris María González Torres; María Isabel Castillo Ramos

    2012-01-01

    En la presente investigación se conceptualizan las políticas públicas esbozando la correspondencia de los proyectos como manifestación de dichas políticas; con la utilización del método análisis-síntesis. Seguidamente se abordan los proyectos de desarrollo y el enfoque de género destacando su importancia desde la concepción del proyecto. Finalmente se proponen los elementos que en el orden teórico sustentan la construcción de

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

    E-print Network

    pag. 1S. Marsili-Libelli: Introduzione ai Fuzzy Sets Ragionamento approssimato con concetti definiti in modo vago #12;pag. 2S. Marsili-Libelli: Introduzione ai fuzzy sets E' più importante la precisione o il significato? #12;pag. 3S. Marsili-Libelli: Introduzione ai fuzzy sets Valori Crisp e Fuzzy

  17. 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 · GPS Reference Stations RED CORS del NGS en PR Magueyes CORS Site-PRMI #12;Concepto Desarrollo Tecnológico Instrumentación · GPS Internet Ready Red de GPS a tiempo Real en proceso Leica Spider Net en

  18. MlBibTEX meets ConTEXt JEAN-MICHEL HUFFLEN

    E-print Network

    Paris-Sud XI, Université de

    of both ConTEXt and MlBibTEX features when they are used together. Also, many end-users are accustomed, bibliographies, bibliography styles, BibTEX, MlBibTEX. Introduction Listing the bibliographical references cited, searches bibliog- raphy database files for resources associated with these keys, and arranges them

  19. Problemi degli investimenti in venture capital con particolare riferimento al settore delle biotecnologie

    Microsoft Academic Search

    Virginia DAgostino

    2006-01-01

    Problemi degli investimenti in venture capital con particolare riferimento al settore delle biotecnologie (di V. Dagostino) - ABSTRACT: Il presente articolo si propone di esaminare le modalità di selezione e gestione di progetti finanziati da parte delle società di Venture Capital (VC) e di Private Equity. L’obiettivo del lavoro è, tra l’altro, quello di verificare se tra fondi italiani e

  20. Modi istantanei di vibrazione radiale ed elicoidale: teoria a confronto con

    E-print Network

    Cocco, Simona

    Capitolo 4 Modi istantanei di vibrazione radiale ed elicoidale: teoria a confronto con gli a temperatura ambiente. In una molecola di DNA i modi di vibrazione delle coppie di basi nel legame idrogeno e della doppia elica sono modi collettivi , essi coinvolgono cio#18;e gruppi di atomi ed avvengono su una

  1. EDUCATOR'S GUIDE Field Trip to the Moon Educator Guide COnTEnTS

    E-print Network

    into Earth's orbit· Earth's Magnetosphere· Spacecraft Flyby· Moon (approach, orbit, and landing)· ClassroomEDUCATOR'S GUIDE #12;Field Trip to the Moon Educator Guide COnTEnTS Table of Contents 3 Program 55 Medical 70 Name Tags #12;Field Trip to the Moon Educator Guide OVERVIEW What Is Field Trip

  2. 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...

  3. PHILOSOPHICAL MAGAZINE B, 2002, VOL. 82, NO. 5, 507515 Study of the b relaxation in supercooled conned water

    E-print Network

    Tuscia, Università Degli Studi Della

    water is modi®ed by the interactions with hydrophilic and hydrophobic substrates at diOEerent levels on water con®ned in Vycor glass has been performed to test the behaviour of the hydrogen dynamics against is not in its bulk form but is in contact with substrates or ®lls small cavities. Everyday examples are water

  4. La responsabilidad social Empresarial –RSE- con enfoque ambiental en las medianas y grandes empresas del municipio de Villavicencio

    Microsoft Academic Search

    Leidy Susana Ramirez; Diana Milena Rivera Rozo

    2011-01-01

    Este artículo analiza el nivel de conocimiento y aplicación de la responsabilidad social –RSE - con enfoque ambiental en las medianas y grandes empresas del Municipio de Villavicencio. Con este objetivo se estima la aplicación de una encuesta a las empresas comerciales, industriales y de servicios que fueron clasificadas a través de una muestra estratificada y seleccionadas de forma aleatoria.

  5. Para mayor informacin sobre E-Verify, favor ponerse en contacto con la oficina del DHS llamando al

    E-print Network

    Para mayor información sobre E-Verify, favor ponerse en contacto con la oficina del DHS llamando al necesario, al Departamento de Seguridad Nacional (DHS), información obtenida del Formulario I-9 contacto con la oficina del SSA y, o el DHS antes de tomar una determinación adversa en contra suya

  6. Añadir quimioterapia después de la radioterapia mejora la supervivencia de adultos con un tipo de tumor cerebral de crecimiento lento

    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 de un estudio clínico aleatorizado y controlado, subvencionado por los NIH.

  7. 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).

  8. The ConStratO model of handover: a tool to support technology design and evaluation

    Microsoft Academic Search

    Rebecca Randell; Stephanie Wilson; Peter Woodward; Julia Galliers

    2011-01-01

    Handovers are a specific kind of multi-disciplinary team meeting. Shift handovers and transfers are both regular features of hospital work but there is currently great variation in how such handovers are conducted, presenting a challenge for those seeking to develop technology to support handover. This article presents the ConStratO model of handover, which captures aspects of the context that influence

  9. Maxima verosimilitud Tenemos una variable X discreta con funcion de masa

    E-print Network

    Fernández Gallardo, Pablo

    M´axima verosimilitud Tenemos una variable X discreta con funci´on de masa f (x; ), donde x A y #12;Llamamos funci´on de verosimilitud a la funci´on V V (; x1, . . . , xn) = n i=1 f (xi ln(f (xi ; )), la log-verosimilitud. Las funciones V y LV alcanzan el m´aximo en el mismo punto de

  10. Deficiencias del test de la razon de verosimilitud para contrastar ciertas hipotesis con restricciones de orden

    Microsoft Academic Search

    José A. Menéndez Fernández; Bonifacio Salvador González

    1987-01-01

    Resumen  En este trabajo se estudian problemas de test de hipótesis para el vector de las medias de poblaciones normales independientes\\u000a con varianzas conocidas, cuando ambas, la hipótesis nula y la alternativa, imponen restricciones de orden sobre los parámetros.\\u000a \\u000a Se demuestra que para las hipótesis planteadas el test de razón de verosimilitud (TRV) está dominado por otro TRV para hipótesis\\u000a que

  11. Agent-Oriented Requirements Engineering Using ConGolog and i

    Microsoft Academic Search

    Xiyun Wang; Yves Lespérance

    2001-01-01

    Agent-oriented approaches are becoming popular in software engineering, both as architectural frameworks, and as modeling frameworks for requirements engineering and design. i* is an informal diagram-based language for early-phase requirements engineering that supports the modeling of social dependencies between agents and how process design choices affect the agents' goals both functional and non-functional. ConGolog is an expressive logic-based formalism for

  12. CyliCon: software package for 3D reconstruction of industrial pipelines

    Microsoft Academic Search

    N. Navab; N. Craft; S. Bauer; A. Bani-Hashemi

    1998-01-01

    As-built reconstruction of existing industrial facilities such as power plants still involves much interactive work even though photogrammetry techniques are greatly used in this process. The majority of existing systems are based on 3D-point reconstruction. In general, these systems only use epipolar geometry to help the user. CyliCon is a software package for 3D reconstruction of industrial pipelines. This software

  13. De Cuentos de hadas, Uruguay y otros sueños: Entrevista con Raquel Diana

    E-print Network

    Bravo-Elizondo, Pedro

    1999-10-01

    FALL 1999 145 De Cuentos de hadas, Uruguay y otros sueños: Entrevista con Raquel Diana Pedro Bravo-Elizondo Pasaron treinta años después que Vladimir Propp completara su Morfología del cuento (1928) referida a las narraciones folklóricas para... mi pensamiento, buscar libros y me sirve mucho 146 LATIN AMERICAN THEATRE REVIEW para escribir, me entrega otra visión de las cosas, del mundo. A veces, en un parlamento busco en Sócrates o Schopenhauer ideas que pueda emplear. En Uruguay...

  14. Video Phone 4.3 Inch LCD Display, Touch Screen , RemoCon

    E-print Network

    time Protocol (NTP) Support #12;10 Information & Status IrDA RemoCon Menu Status #12;11 AV Setup OSD · Industry Standard IP based Network Protocol Features APOS AddPac PSTN FXO S-Video Out USB Interface RCA (2 x 3.5mm Stereo Female Connector) (Mic/Line In, Line Out (Head Phone)) · VoIP based Signaling

  15. Dise~no de redes en chip de proposito especifico con informacion de rutado fisico

    E-print Network

    De Micheli, Giovanni

    Dise~no de redes en chip de prop´osito espec´ifico con informaci´on de rutado f´isico David Atienza Sistemas en Chip (SoCs), recientemente se ha propuesto el nuevo paradigma de Redes en Chip (NoCs) para So´iculo presentamos una nueva metodolog´ia de dise~no para NoCs a medida, que tiene en consideraci´on la informaci´on

  16. ConKMeL: a contextual knowledge management framework to support multimedia e-Learning

    Microsoft Academic Search

    Weihong Huang; Alain Mille

    2006-01-01

    As the latest stage of learning and training evolution, e-Learning is supposed to provide intelligent functionalities not only in processing multi-media education resources but also in supporting context-sensitive pedagogical education processes. Towards providing an integrated solution for intelligent multimedia e-Learning, this paper presents a context-aware knowledge management framework named ConKMeL. Proposed framework features a semantic context-based approach for representing and

  17. Estrategias de aprendizaje en estudiantes de enseñanza secundaria obligatoria y su relación con la autoestima

    Microsoft Academic Search

    José J. Gázquez; María del Carmen Pérez; María Isabel Ruiz; Francisco Miras; Florencio Vicente

    Learning strategies in secondary-school students and relationship with self-steem. A con- siderable number of studies have been published providing data in support of the hypothesis of a relationship between pupils' self-image and the selection and\\/or use of learning strategies. The main objective of the present work was to examine this hypothesis by exploring the relationship between high scores in self-esteem

  18. Composition-Tuned ConSi Nanowires: Location-Selective Simultaneous Growth

    E-print Network

    Kim, Bongsoo

    structuresOsimple cubic (CoSi), orthorhombic (Co2Si), and face-centered cu- bic (fcc) (Co3SiOsimple cubic (CoSi), orthorhombic (Co2Si), and face-centered cubic (Co3Si)Ofollowing a composition change. Con and detailed crystal structure of single-crystalline Co2Si and Co3Si are reported for the first time including

  19. Structure, stratigraphy and petroleum geology of the south east Nam Con Son Basin, offshore Vietnam

    SciTech Connect

    Fraser, A.J.; Matthews, S.J.; Lowe, S.; Todd, S.P.; Simon, P. Peel, F.J. [BP Exploration Operating Co., Ltd., Uxbridge (United Kingdom)

    1996-12-31

    Recent exploration of the south east Nam Con Son Basin, offshore Vietnam, by BP in alliance with Statoil has involved acquisition of new seismic and well data. These new data have allowed re-evaluation of the tectono-stratigraphic development and petroleum geology, and have provided additional constraints on the regional tectonic evolution. The offshore Vietnamese basins have evolved in response to the complex relative motions of Indochina, Peninsular Malaysia, Borneo and the South China Sea during the Cenozoic. On the regional scale these motions have been accommodated by strike-slip fault development, rifting and contraction. In the Nam Con Son Basin these motions have interacted in different ways from the Palaeogene to recent. Two rifting episodes are recognized; a Palaeogene phase dominated by E-W trending extensional faults, and a Miocene phase dominated by N-S to NE-SW trending faults. The structural evolution is complicated by a pulse of mild contraction during the Middle Miocene. The sedimentary fill of the basin evolves from continental fluvio-lacustrine in the Palaeogene through to fully marine following the second phase of rifting in the Miocene. This pulsed structural and stratigraphic evolution has resulted in basinwide deposition of source, reservoir and seal facies, and produced a variety of potential trapping styles. This paper describes the hydrocarbon habitat of the south east Nam Con Son Basin within the context of the regional tectono-stratigraphic model.

  20. Structure, stratigraphy and petroleum geology of the south east Nam Con Son Basin, offshore Vietnam

    SciTech Connect

    Fraser, A.J.; Matthews, S.J.; Lowe, S.; Todd, S.P.; Simon, P. Peel, F.J. (BP Exploration Operating Co., Ltd., Uxbridge (United Kingdom))

    1996-01-01

    Recent exploration of the south east Nam Con Son Basin, offshore Vietnam, by BP in alliance with Statoil has involved acquisition of new seismic and well data. These new data have allowed re-evaluation of the tectono-stratigraphic development and petroleum geology, and have provided additional constraints on the regional tectonic evolution. The offshore Vietnamese basins have evolved in response to the complex relative motions of Indochina, Peninsular Malaysia, Borneo and the South China Sea during the Cenozoic. On the regional scale these motions have been accommodated by strike-slip fault development, rifting and contraction. In the Nam Con Son Basin these motions have interacted in different ways from the Palaeogene to recent. Two rifting episodes are recognized; a Palaeogene phase dominated by E-W trending extensional faults, and a Miocene phase dominated by N-S to NE-SW trending faults. The structural evolution is complicated by a pulse of mild contraction during the Middle Miocene. The sedimentary fill of the basin evolves from continental fluvio-lacustrine in the Palaeogene through to fully marine following the second phase of rifting in the Miocene. This pulsed structural and stratigraphic evolution has resulted in basinwide deposition of source, reservoir and seal facies, and produced a variety of potential trapping styles. This paper describes the hydrocarbon habitat of the south east Nam Con Son Basin within the context of the regional tectono-stratigraphic model.

  1. 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

  2. Fertilizing cotton with recovered P from swine manure

    Technology Transfer Automated Retrieval System (TEKTRAN)

    A new treatment technology has been developed to recover soluble P from liquid swine manure. Our objective was to compare P availability and leaching distribution in soils using the recovered P from swine wastewater (31% P2O5) compared with triple superphosphate (46% P2O5) and broiler litter (2.6% P...

  3. Con_A-carbone nanotube conjugate with short wave near-infrared laser ablation for tumor therapy

    NASA Astrophysics Data System (ADS)

    Lei, Huan-Yao; Peng, Ching-An; Tang, Ming-Jer; Reindhart, Kit; Szu, Harold H.

    2009-04-01

    Using the characteristics of T cell mitogen called lectin protein from the jack-beam Canavalia ensiformis Concanavalin A (Con_A) with dual activities, cytotoxicity and immunomodulation, we have shown it has a therapeutic effect on hepatoma. Injection of Con_A can eradicate the established malign tumor, because Con_A can induce tumor cell autophagic, cell-programmed death, as well as activate the effector T cells. Combined, in this paper, with the absorption exceeding the Carbon NanoTube (CNT) band-gap (?bg=~1/CNT diameter) with an active short wave near-infrared (SWIR) (1.2~1.5 micron wavelengths), which happened to be translucent to the irradiation upon animal skin, similar to that used in hospital fingertip-clamped Pulse Oxymetry. Once the Con_ACNT is guided to hepatoma cells, it is bonded and internalized into the mitochondria (MC) compartment, the cellular energy factory. Con_A has the higher specificity for tumor cells useful for targeting because of the abnormal glycosylation on tumor cells. When CNT hitch hike with Con_A, they can t together like a laser-denotable chemical missile surgically targeting at the tumor cells precisely by Con_A-guidance. We switch on SWIR laser, when the Con_A-CNT conjugated complex has been bonded and internalized to MC of malign cells and already commenced cellular programmed death. Thus, it might appear to casual readers that we have initiated an overkill, chemical drugged autophage followed with physical laser ablation, but what if we can eradicate hepatoma totally if no blue print is left behind inadvertently in case of a partial failure. We conclude that using Con_A-CNT conjugated complex targeting specifically at malign tumor cells is a novel targeted-laser-radiation therapy for tumors in mice.

  4. NatSci 499 E/F: Integrative Scientific Research (iCons 4; 6 credits) Faculty Contact: Prof. Scott M. Auerbach (iCons Program Director; auerbach@chem.umass.edu) or

    E-print Network

    Auerbach, Scott M.

    in self-reflection as learners, providing and utilizing constructive criticism (IE1). Course ComponentsCons Senior Expo. Self-reflection and knowledge integration through portfolio development and dissemination

  5. The rights, tensions, and ideas that inform the con-temporary human experience were explored by the

    E-print Network

    The rights, tensions, and ideas that inform the con- temporary human experience were explored Trustee. Examining the Human Experience ANDREAKANE CLIFFMOORE #12;; and the conception and challenges of human rights from historical, philo- sophical, political, and sociological

  6. Neogene stratigraphic relationships within the Nam Con Son Basin, offshore Vietnam resulting from tectonics, eustasy, and sediment flux 

    E-print Network

    Wright, Christine M.

    2009-05-15

    in the East Nam Con Son Basin. Age constraints were assigned to key stratigraphic horizons by correlating sequence boundaries with published sea level curves. Accommodation in the study area is controlled by shelf -edge compaction, rift-related thermal...

  7. 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

  8. 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

  9. 40 CFR 180.1213 - Coniothyrium minitans strain CON/M/91-08; exemption from the requirement of a tolerance.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...false Coniothyrium minitans strain CON/M/91-08; exemption from the requirement...1213 Coniothyrium minitans strain CON/M/91-08; exemption from the requirement...pesticide Coniothyrium minitans strain CON/M/91- 08 when used in or on all food...

  10. PPoollvvoo ddee ccoommppoossiicciinn vvttrreeaa ccoonn aaccttiivviiddaadd bbiioocciiddaa Un grupo de investigacin del CSIC ha desarrollado un polvo vtreo con una alta concentracin

    E-print Network

    forma de Ca2+) como agente biocida. El polvo está compuesto por nanopartículas de óxido de silicio con a ser tóxicas o agresivas con el medio ambiente. Igualmente ocurre con los agentes biocidas orgánicos de calcio (CaO) como agente biocida. La actuación biocida de este polvo vítreo es causada por la

  11. CUERPO CURSO DEPARTAMENTO PERSONA Pdi con vinculacin permanente y pdi doctor -Membres Nats2014-15 SOCIOLOGIA II BAS AMOROS, JOSE ENRIQUE

    E-print Network

    Escolano, Francisco

    CUERPO CURSO DEPARTAMENTO PERSONA Pdi con vinculación permanente y pdi doctor - Membres Nats2014-15 SOCIOLOGIA II BAS AMOROS, JOSE ENRIQUE Pdi con vinculación permanente y pdi doctor - Membres Nats2014-15 SOCIOLOGIA II LA PARRA CASADO, DANIEL Pdi con vinculación permanente y pdi doctor - Membres Nats2014

  12. Con A induction of IgG secretion from a B-lymphoid tumour cell line, A20.

    PubMed Central

    Kim, K J; Dejoy, S Q

    1986-01-01

    We have examined the effect of concanavalin A (Con A), a conventionally known T-cell mitogen, on the induction of Ig secretion from BALB/c B lymphoid cell lines expressing membrane IgM (X16C8.5, BALENTL 17.7.2 and BCL1) or membrane IgG (A20 and M12.4). A20 tumour cells, but not other tumour cells, responded to Con A by secreting Ig as measured by the reverse plaque-forming cell (PFC) assay. Another typical T-cell mitogen, phytohaemagglutinin (PHA), did not have any effect on the differentiation of A20 tumour cells. The addition of NaN3 abolished the PFC formation, showing that IgG PFC formation of A20 tumour cells was due to the active synthesis of secreted IgG and not due to the shedding of mIgG. The increase in the biosynthesis of secreted IgG from A20 tumour cells by Con A was also observed by polyacrylamide gel electrophoresis. The ability of Con A to induce IgG secretion from A20 tumour cells was abolished by the addition of alpha-methylmannoside, confirming that Con A itself, and not some contaminating material in Con A, induced the maturation of A20 tumour cells. Con A was also shown to induce Ig secretion, but not proliferation, in a subset of normal B cells. Thus, we conclude that Con A does give a differentiation signal to a subset of B cells. Images Figure 2 PMID:3530982

  13. Con A induction of IgG secretion from a B-lymphoid tumour cell line, A20.

    PubMed

    Kim, K J; Dejoy, S Q

    1986-09-01

    We have examined the effect of concanavalin A (Con A), a conventionally known T-cell mitogen, on the induction of Ig secretion from BALB/c B lymphoid cell lines expressing membrane IgM (X16C8.5, BALENTL 17.7.2 and BCL1) or membrane IgG (A20 and M12.4). A20 tumour cells, but not other tumour cells, responded to Con A by secreting Ig as measured by the reverse plaque-forming cell (PFC) assay. Another typical T-cell mitogen, phytohaemagglutinin (PHA), did not have any effect on the differentiation of A20 tumour cells. The addition of NaN3 abolished the PFC formation, showing that IgG PFC formation of A20 tumour cells was due to the active synthesis of secreted IgG and not due to the shedding of mIgG. The increase in the biosynthesis of secreted IgG from A20 tumour cells by Con A was also observed by polyacrylamide gel electrophoresis. The ability of Con A to induce IgG secretion from A20 tumour cells was abolished by the addition of alpha-methylmannoside, confirming that Con A itself, and not some contaminating material in Con A, induced the maturation of A20 tumour cells. Con A was also shown to induce Ig secretion, but not proliferation, in a subset of normal B cells. Thus, we conclude that Con A does give a differentiation signal to a subset of B cells. PMID:3530982

  14. 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

  15. CONFIGURACION EDUROAM PARA MOVILES SYMBIAN S60 v3 Para poder configurar Eduroam en nuestro dispositivo con Symbian primero debemos

    E-print Network

    Valencia, Universidad de

    Trust External CA Root y el (DER) de UTN-USERFirst-Hardware en Jerarquia 1 y le damos a Guardar/Salvar, para cada páginas: #12;Conexión a Eduroam con Symbian S60 v3 PacoEB5HTC Ing. Tec. Teleco. Sistemas Electrónicos. "Ajustes". #12;Conexión a Eduroam con Symbian S60 v3 PacoEB5HTC Ing. Tec. Teleco. Sistemas

  16. Esercizi quarta settimana1 Determinare lo sviluppo asintotico delle seguenti funzioni nella scala delle potenze per x 0 con

    E-print Network

    Marconi, Umberto

    delle potenze per x 0 con almeno tre termini consecutivi: ex - sin x - 1 sinh2 x (1 - cosh x) sin x 3 x + x4 cos sin x sin(1 - cos x) esin x cos x + sin x ex2 Determinare lo sviluppo asintotico delle seguenti funzioni nella scala delle potenze per x + con almeno tre termini consecutivi: 3 x + x4 sinh sin

  17. 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

  18. Feeding of grey squirrels (Sciurus carolinensis) with the contraceptive agent DiazaCon™: effect on cholesterol, hematology, and blood chemistry.

    PubMed

    Yoder, Christi A; Mayle, Brenda A; Furcolow, Carol A; Cowan, David P; Fagerstone, Kathleen A

    2011-12-01

    Grey squirrels (Sciurus carolinensis) are an invasive species in Britain and Italy. They have replaced native red squirrels (Sciurus vulgaris) throughout most of Britain, and cause damage to trees. Currently, lethal control is used to manage grey squirrel populations in Britain, but nonlethal methods might be more acceptable to the public. One such method is contraception with 20,25-diazacholesterol dihydrochloride (DiazaCon™). DiazaCon™ inhibits the conversion of desmosterol to cholesterol, resulting in increasing desmosterol concentrations and decreasing cholesterol concentrations. Because cholesterol is needed for the synthesis of steroid reproductive hormones, such as progesterone and testosterone, inhibition of cholesterol synthesis indirectly inhibits reproduction. Desmosterol is used as a marker of efficacy in laboratory studies with species that do not reproduce readily in captivity. Grey squirrels were gavaged with a DiazaCon™ solution for 2 days, and then fed DiazaCon™-coated peanuts for an additional 8 days at target doses of 50 and 100 mg DiazaCon™ per kg body weight. There was a significant difference in cholesterol concentrations in the treatment groups compared to the control group. Cholesterol was reduced by ? 40% for 2 months in both treatment groups. There were no differences among groups with respect to blood chemistry and hematology parameters, and mean values are reported. The mean overall dose of DiazaCon™ received was 29.0 ± 1.6 and 55.3 ± 4.3 mg/kg in the low (50 mg/kg) and high dose (100 mg/kg) groups, respectively. DiazaCon™ might provide an effective, acceptable alternative to lethal control. PMID:22182332

  19. 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

  20. Nest destruction elicits indiscriminate con- versus heterospecific brood parasitism in a captive bird.

    PubMed

    Shaw, Rachael C; Feeney, William E; Hauber, Mark E

    2014-12-01

    Following nest destruction, the laying of physiologically committed eggs (eggs that are ovulated, yolked, and making their way through the oviduct) in the nests of other birds is considered a viable pathway for the evolution of obligate interspecific brood parasitism. While intraspecific brood parasitism in response to nest predation has been experimentally demonstrated, this pathway has yet to be evaluated in an interspecific context. We studied patterns of egg laying following experimental nest destruction in captive zebra finches, Taeniopygia guttata, a frequent intraspecific brood parasite. We found that zebra finches laid physiologically committed eggs indiscriminately between nests containing conspecific eggs and nests containing heterospecific eggs (of Bengalese finches, Lonchura striata vars. domestica), despite the con- and heterospecific eggs differing in both size and coloration. This is the first experimental evidence that nest destruction may provide a pathway for the evolution of interspecific brood parasitism in birds. PMID:25512846

  1. Phase transition and chemical decomposition of shocked CO-N2 mixture.

    PubMed

    Chen, GuanYu; Jiang, XiaoXu; Cheng, XinLu; Zhang, Hong

    2012-08-01

    Using quantum molecular dynamics simulations based on density functional theory including dispersion corrections (DFT-D), we have studied the thermophysical properties of liquid carbon monoxide and nitrogen (CO-N(2)) mixture under extreme conditions. Density functional theory (DFT) method significantly overestimates the pressure as compared to DFT-D. It is demonstrated that the van der Waals (vdW) interaction has a negative contribution to the pressure and tends to reduce the overestimation of the equilibrium volume. We also demonstrate that a negative slope of Hugoniot curve could possibly be caused by both the absorption of dissociation energy and the uncertainties in composition. As density and temperature increase along the Hoguniot curve, the system appears to undergo a continuous transition and provides for a much richer set of dissociation products. The influence of dissociated carbon and oxygen atoms on nitrogen molecules is also discussed. PMID:22894361

  2. The new human papillomavirus (HPV) vaccine: pros and cons for pediatric and adolescent health.

    PubMed

    Thomas, Tami L

    2008-01-01

    The new human papillomavirus (HPV) vaccine is a research breakthrough for pediatric/adolescent health to prevent cervical cancer and related morbidity. The annual heath care cost for the treatment of cervical cancer and genital warts is estimated to be more than three billion dollars a year. The new HPV vaccine has incredible potential to improve reproductive health promotion, reduce health care costs, and close health care disparity gaps. However, issues both for and against the new HPV vaccine, including mandating vaccination, high cost of the vaccine, the short duration of protection offered, and the perceived promotion of sexual activity, cause confusion. Pediatric nurses, including those in advanced practice, benefit by understanding the pros and cons of these issues in advocating for their patients. PMID:19051848

  3. What to consider when regulating electronic cigarettes: Pros, cons and unintended consequences.

    PubMed

    Caponnetto, Pasquale; Saitta, Daniela; Sweanor, David; Polosa, Riccardo

    2015-06-01

    Many public health experts, medical research societies, large health organizations and policy makers have expressed concerns about the increased popularity of electronic cigarettes and have pushed for more restrictive measures ranging from complete bans to tight regulations of these products either as medicines or as tobacco products. But these concerns have never been adequately qualified nor quantified. Without judicious assessment and thorough evaluation, regulations may have unintended consequences that can do more damage than good in public health terms. In this article, we will appraise the existing prominent regulatory frameworks for e-cigarettes, namely, general consumer product, medicinal product and tobacco product regulation, to highlight their pros and cons. Moreover, we provide concrete examples of the unintended consequences which may arise from inappropriate regulatory action. PMID:25857204

  4. A maritime navigation display that provides visual feedback to improve conning officers' ship-handling during low visibility environments.

    PubMed

    Evanoff, Thomas V; Krebs, William K

    2002-12-15

    Navigating a ship at night in close proximity to another vessel is a dangerous task. To improve conning officers' night time ship-handling performance, a visual navigation display is proposed that is mounted on the stern of the aircraft carrier that will help shipboard conning officers manoeuvre in a battle group formation. To test the effectiveness of the visual navigation display, the Nimitz-class aircraft and plane guard vessel, a Ticonderoga-class cruiser, were modelled in a virtual environment. A navigation display condition had significantly fewer navigational positional errors than a non-navigation display condition. The navigation display provided immediate feedback as to whether the aircraft carrier had changed bearing or speed, thus enabling the operator to initiate the appropriate input to maintain station astern of the carrier. Actual or potential applications of this research include the deployment of a maritime navigation display to assist conning officers' ship handling. PMID:12569043

  5. Compito di Comunicazioni radiomobili: 05/04/2005 Si consideri un terminale mobile che si sposta con velocita' v = 50 km/h e che trasmette alla frequenza

    E-print Network

    Abrardo, Andrea

    che si sposta con velocita' v = 50 km/h e che trasmette alla frequenza f0 = 1.5 GHz con bit rate sul deve essere caratterizzato da T = 36, ovvero da K = N - 2T = 183. La velocita' al netto della codifica km/h e che trasmette alla frequenza f0 = 1.5 GHz con bit rate al netto della codifica Rb = 15 kbit

  6. 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.

  7. BANDO N. 01-2010 PER IL RECLUTAMENTO DI UN RICERCATORE CON RAPPORTO DI LAVORO A TEMPO DETERMINATO

    E-print Network

    Guidoni, Leonardo

    Il Direttore del Dipartimento di Fisiologia e Farmacologia "Vittorio Erspamer" Visto il Regolamento Fisiologia e Farmacologia "Vittorio Erspamer" e la Fondazione "Enrico ed Enrica Sovena", con sede in Roma costituenti chimici"; Vista la Delibera del Consiglio del Dipartimento di Fisiologia e Farmacologia "Vittorio

  8. An E cient Con ict-Resolution Approach to Support Read/Write Operations in a Video Server1

    E-print Network

    Chang, Ye-In

    Mathematics National Chiao Tung University National Sun Yat-Sen University Hsinchu, Taiwan Kaohsiung, Taiwan of subobjects after subobject i are increased by one. Only when such a new con ict occurs, one movement movement cost, a deferring approach is proposed at the cost of an additional bu er. In this approach, n

  9. 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...

  10. 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...

  11. FUNDAMENTACIN Body mix es una modalidad del fitness que se ha creado con el fin de unificar

    E-print Network

    Escolano, Francisco

    BODY MIX FUNDAMENTACIÓN Body mix es una modalidad del fitness que se ha creado con el fin de unificar disciplinas como body pump, body balance, body combat y body attack. Vamos a definir brevemente en qué consiste cada una de las disciplinas: Body pump es un programa de entrenamiento que destaca por

  12. 2Un Sobrevuelo del Asteroide Lutetia La nave espacial europea Rosetta de la Agencia, con instrumentos de la

    E-print Network

    Christian, Eric

    instrumentos de la NASA a bordo, sobrevoló el asteroide Lutetia sábado, 10 de julio 2010. El diámetro del2Un Sobrevuelo del Asteroide Lutetia La nave espacial europea Rosetta de la Agencia, con asteroide es de unos 130 km. Esta fotografía fue tomada desde una distancia de 3.162 kilometros. Problema 1

  13. 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

  14. PESCA ARTESANAL DE BIVALVOS (Anadara tuberculosa y A. similis) Y SU RELACIÓN CON EVENTOS AMBIENTALES. PACÍFICO COLOMBIANO

    Microsoft Academic Search

    Carlos A. Borda; Raúl Cruz

    RESUMEN La piangua (Anadara tuberculosa y Anadara similis) habita en las zonas mesolitorales asociado a las raíces del mangle (Rhizophora spp.). En Colombia, estos bivalvos son la base de una pesquería exclusivamente artesanal de subsistencia, desarrollada por las comunidades ubicadas en el litoral del Océano Pacífico, cuya población es de 70 000 habitantes, 18 000 están relacionados con la actividad

  15. DiSTiL is a software generator that implements a declarative domain-specific language (DSL) for con-

    E-print Network

    Smaragdakis, Yannis

    Abstract DiSTiL is a software generator that implements a declarative domain-specific language (DSL) for con- tainer data structures. DiSTiL is a representative of a new approach to domain-specific language implementa- tion. Instead of being the usual one-of-a-kind stand- alone compiler, DiSTiL is an extension

  16. ¿Coinciden EVA(R) y Utilidad Economica (UE) con los metodos de Flujo de Caja Descontado en valoracion de empresas?

    Microsoft Academic Search

    Ignacio Vélez Pareja; Joseph Tham

    2003-01-01

    En Vélez-Pareja y Tham (2001), presentamos diferentes maneras de valorar los flujos de caja. Primero se utilizó el costo promedio ponderado de capital (CPPC) (Weighted Average Cost of Capital, WACC) para descontar el flujo de caja libre (FCL). Segundo, se descontó el FCL con el WACC ajustado. Y en tercer lugar descontamos el flujo de caja del capital (capital cash

  17. 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

  18. Un Sistema de Apoyo al Consenso Adaptativo para Problemas de Toma de Decisin en Grupo con Informacin Heterognea

    E-print Network

    Granada, Universidad de

    hacia el nivel de acuerdo buscado, TOMA DE DECISIONES EN GRUPO GRUPO DE EXPERTOS MODERADOR PREFERENCIAS CONSENSUADAS Toma de Decisiones I: Modelos 157 #12;Figura 3. El proceso de unificación deUn Sistema de Apoyo al Consenso Adaptativo para Problemas de Toma de Decisión en Grupo con

  19. Oxacilin-resistant Coagulase-negative staphylococci (CoNS) bacteremia in a general hospital at São Paulo city, Brasil.

    PubMed

    d'Azevedo, P A; Secchi, C; Antunes, A L S; Sales, T; Silva, F M; Tranchesi, R; Pignatari, A C C

    2008-10-01

    In the last decades, coagulase-negative staphylococci (CoNS), especially Staphylococcus epidermidis have become an important cause of bloodstream infections. In addition, rates of methicillin-resistance among CoNS have increased substantially, leading to the use of glicopeptides for therapy. The objective of this study was to evaluate eleven consecutives clinically relevant cases of oxacillin-resistant CoNS bacteremia in a general hospital localized in São Paulo city, Brazil. Five different species were identified by different phenotypic methods, including S. epidermidis (5), S. haemolyticus (3), S. hominis (1), S. warneri (1) and S. cohnii subsp urealyticus (1). A variety of Pulsed Field Gel Electrophoresis profiles was observed by macrorestriction DNA analysis in S. epidermidis isolates, but two of three S. haemolyticus isolates presented the same profile. These data indicated the heterogeneity of the CoNS isolates, suggesting that horizontal dissemination of these microorganisms in the investigated hospital was not frequent. One S. epidermidis and one S. haemolyticus isolates were resistant to teicoplanin and susceptible to vancomycin. The selective pressure due to the use of teicoplanin in this hospital is relevant. PMID:24031279

  20. MATH 220: CONVERGENCE OF THE FOURIER SERIES We now discuss convergence of the Fourier series on compact intervals I. `Con-

    E-print Network

    Vasy, András

    MATH 220: CONVERGENCE OF THE FOURIER SERIES We now discuss convergence of the Fourier series on compact intervals I. `Con- vergence' depends on the notion of convergence we use, such as (i) L2 : uj u(x) - u(x)| 0. Note that pointwise convergence is too weak for most purposes, so e.g. just because uj u

  1. Asunto : OFERTA DE CURSOS DE INGLS DE VERANO PARA CHICOS DE 4 A 18 AOS CON DESCUENTOS EXCLUSIVOS

    E-print Network

    Oro, Daniel

    Asunto : OFERTA DE CURSOS DE INGLÉS DE VERANO PARA CHICOS DE 4 A 18 AÑOS CON DESCUENTOS EXCLUSIVOS a chicos de 4 a 18 años, las propuestas más originales en sus cursos residenciales de inglés y deportes durante el verano. Estos intensivos programas lingüísticos, únicos en Europa, son cursos residenciales y

  2. CALL FOR PAPERS CLimAtE ECOnOmiCS And LAw COnFEREnCE

    E-print Network

    Mühlemann, Oliver

    CALL FOR PAPERS CLimAtE ECOnOmiCS And LAw COnFEREnCE ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ Climate Economics and Law Conference 16 ­ 17 June 2011 University of Bern, Bern, Switzerland ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ The NCCR Climate invites scientists to the "Climate Economics and Law Conference" that will take place

  3. Low energy consumption is becoming the primary design con-sideration for battery-operated and portable embedded sys-

    E-print Network

    Childers, Bruce

    Abstract Low energy consumption is becoming the primary design con- sideration for battery-operated in 2000 [21]. Not only has the sheer demand for battery-operated devices grown, but the expectations, battery operated embedded systems, such as cellular phones, digital motion and still cameras, personal

  4. Estimado Colega, Es un deseo de muchos de nosotros en Colombia el de poder contar con un Instituto

    E-print Network

    Uribe, Bernardo

    Estimado Colega, Es un deseo de muchos de nosotros en Colombia el de poder contar con un Instituto creación de un Instituto de Matemáticas en Colombia ha existido desde hace varios años. Son muchos los miembros de la comunidad matemática del país y del extranjero que consideran que Colombia ha alcanzado el

  5. 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

  6. Data Structures with Dynamical Random Transitions Nadine Guillotin-Plantard Bruno Pin con y Ren e Schott z

    E-print Network

    Henri Poincaré -Nancy-Université, Université

    Data Structures with Dynamical Random Transitions Nadine Guillotin-Plantard #3; Bruno Pin#24;con y Ren#19;e Schott z Key words: Dynamic random walks, data structures, dynamical systems, large deviation-standard) probabilistic analysis of dynamic data structures whose sizes are considered as dynamic random walks. The basic

  7. Global trade in dairy products involves complex and con-tentious issues. Viewed broadly from the perspective of

    E-print Network

    Radeloff, Volker C.

    Global trade in dairy products involves complex and con- tentious issues. Viewed broadly from the perspective of "society," there are large benefits from liberalizing trade. Viewed narrowly from the perspective of dairy producers, liberalized trade is desirable only if it expands exports and reduces imports

  8. Connessione di R Nota. Se c R, con la frase intervallo di centro c intendiamo intervallo di centro c e

    E-print Network

    Marconi, Umberto

    1 Connessione di R Nota. Se c R, con la frase intervallo di centro c intendiamo intervallo di centro c e raggio un numero reale maggiore di 0. La seguente proposizione `e stata dimostrata a lezione ed `e analoga a [GDM, 6.3.1]. Essa dice che un insieme A `e aperto se e solo se per ogni c A esiste

  9. Deutsche Bank Deutsche Bank S.p.A. la consociata italiana di Deutsche Bank AG che, con oltre

    E-print Network

    Robbiano, Lorenzo

    Deutsche Bank Deutsche Bank S.p.A. è la consociata italiana di Deutsche Bank AG che, con oltre 100.000 collaboratori in più di 72 Paesi nel mondo, vanta più di 24 milioni di clienti. Deutsche Bank ricerca brillanti

  10. A new millimeter-wave observation of the weakly bound CO-N2 complex

    NASA Astrophysics Data System (ADS)

    Surin, L. A.; Potapov, A.; Müller, H. S. P.; Schlemmer, S.

    2015-01-01

    New millimeter-wave transitions of the CO-N2 van der Waals complex have been observed using the intracavity OROTRON jet spectrometer in the frequency range of 103-159 GHz. For the less abundant form, CO-paraN2, a total of 37 rotational transitions were assigned to three K = 0-0, 0-1, 2-1 subbands connecting the (jCO, jN2) = (1, 1) and (jCO, jN2) = (0, 1) internal rotor states. The upper K = 0 and K = 2 "stacks" of rotational levels were probed for the first time here by millimeter-wave spectroscopy following a recent infrared study by Rezaei et al. (2013). The observation of new subbands fixes with higher precision not only these upper K = 0 and K = 2 but also lower K = 1(f) levels, not linked with other stacks in earlier rotational studies. For the more abundant form, CO-orthoN2, five new P-branch rotational transitions of the K = 0-0 "CO bending" subband are reported, thus extending previous measurements. Nuclear quadrupole hyperfine structure due to the presence of two equivalent 14N nuclei was partly resolved and analyzed to give additional information about the angular orientation of the N2 molecule in the complex.

  11. [Emission spectrum of liquid CO-N2 mixture at shock compression].

    PubMed

    Sun, Yue; Yi, Peng-Fei; Chen, Xian-Meng; Liu, Fu-Sheng; Zhang, Ming-Jian; Zheng, Xue-Ping; Xue, Xue-Dong

    2009-04-01

    Driving a copper projectile to impact a cryo-target made of aluminous alloy at the speed of 2.21 km x s(-1) with a two stage light gas gun, a proper one dimensional shockwave with a speed of 18.76 km x s(-1) was generated and directly acted on a uniform liquid in target, which was condensed by proportional gaseous carbon monoxide and nitrogen. At the measurement of Hugoniots, the full linear spectrum entirely dissociated with the plasma under the shock pressure of 33.5 GPa was caught by the use of intensified charge coupled device and accurate spectrographic technology. From the analysis of the spectrum, the authors know that the transient spectrograph with six channels can be used to measure and record the course of shock compression-irradiancy reliably, and the emitted spectral lines of shock compressed products indicated that the thermal dissociation and phase transition had occurred in homogeneous liquid of CO-N2. Furthermore, comparing the spectral intensity of lower central wavelength with that of higher, the fact of stronger intensity of 488 nm also validates that changes from "optic thin" to "optic thick" exist indeed in dense hydrocarbon liquid acted on by shock pressure. PMID:19626860

  12. Chemically triggered C-ON bond homolysis in alkoxyamines: regioselectivity and chemoselectivity.

    PubMed

    Audran, Gérard; Brémond, Paul; Ibanou, Matisse Bim Batsiandzy; Marque, Sylvain R A; Roubaud, Valérie; Siri, Didier

    2013-11-28

    Recently, we examplified the activation of the C-ON bond homolysis by protonation, alkylation, benzylation, acylation, oxidation and complexation with a Lewis acid of the nitrogen atom of the 1-(pyridin-4-yl)ethyl fragment (Chem. Commun., 2011, 4291 and Org. Lett., 2012, 358) and of the 1-(pyridin-2-yl)ethyl fragment (J. Org. Chem. ASAP Doi:10.1021/jo401674v) of (N-(2-methylpropyl)-N-(1-diethylphosphono-2,2-dimethylpropyl)-N-oxyl) SG1-based alkoxyamines. The quaternization of the 1-(pyridin-3-yl)ethyl fragment by the aforementioned reactions was investigated for the corresponding SG1-based alkoxyamines. In sharp contrast to the quaternization at ortho and para positions of the pyridyl moiety, the effect of the quaternization at the meta position was weak. The effects of quaternization at ortho, meta and para positions were investigated through natural bond orbital and Mulliken charges, HOMO-LUMO interactions in the starting materials and the radical stabilization energy of the released 1-puridylmethyl radicals using DFT calculations with the B3LYP/6-31G(d) and UBMK/6-311+G(3df,2p)//R(O)B3LYP/6-31G(d) methods, respectively. PMID:24114038

  13. Vibrational relaxation of CO(n = 1) in collisions with He

    SciTech Connect

    Schinke, R.; Diercksen, G.H.F.

    1985-11-01

    We present a full ab initio study of vibrational relaxation of CO(n = 1) in collisions with /sup 3/He and /sup 4/He. The vibrational coordinate dependence of the interaction potential is calculated directly. Dynamical calculations are performed within the IOS and the CS approximation. The IOS cross sections agree very well with the corresponding CS results for both He isotopes, however, the ratio IOS/CS shows a different energy behavior for /sup 3/He and /sup 4/He, respectively. The CS rates for /sup 3/He agree extremely well with the experimental relaxation rates. Although only the reduced mass is changed for /sup 4/He the agreement with experiment is less favorable in this case. It is explicitly demonstrated that the often used procedure to extract the vibrational coordinate dependence of the interaction potential from a dumbbell fit of the rigid-rotor surface is wrong for He--CO. For /sup 3/He the corresponding cross sections are 3--10 times smaller than those obtained form the ab initio potential although the vibrationally elastic parts of the interaction potential are identical.

  14. Combustion synthesis of heterogeneous calcium phosphate bioceramics from calcium oxide and phosphate precursors

    Microsoft Academic Search

    R. Ayers; N. Hannigan; N. Vollmer; C. Unuvar

    2011-01-01

    The solid-state reaction of combustion synthesis has been demonstrated to be capable of rapidly producing materials for biomedical\\u000a applications. Reactant powders of CaO and P2O5 were pressed into cylinders and reacted by heating a tungsten filament in either an argon, CO2 or N2 atmosphere. Reaction systems examined were: (1) 3CaO + P2O5 ? Ca3(PO4)2 (TCP) and (2) 4CaO + P2O5

  15. 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

  16. Strain Rate by Geodetic Observations Associated with Seismic Events in the SIRGAS-CON Network Region.

    NASA Astrophysics Data System (ADS)

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

    2014-12-01

    This research investigates surface strains related to seismic events and their relationship with pre- and post-seismic events in South American, Antarctica, Nazca, Cocos, North American and Caribbean plates , by analyzing the variation of estimated earth coordinates, for the period 2000-2014, supplied by a geodetic network called SIRGAS-CON. Based on data provided by the USGS for the same period, and after the Global Congruency test, we selected the events associated with unstable geodetic network points. The resulting strains were estimated based on the finite element method. It was possible to determine the strains along with the resulting guidelines for pre- and post-seismic, considering each region formed for analysis as a homogeneous solid body. Later, a multi-year solution of the network was estimated and used to estimate the strain rates of the earth surface from the changing directions of the velocity vectors of 332 geodetic points located in the South American plate and surround plates. The strain rate was determined and, using Euler vector computed, it was possible to estimate the convergence and accommodation rates to each plate. The results showed that contraction regions coincide with locations with most of the high magnitude seismic events. It suggest that major movements detected on the surface occur in regions with more heterogeneous geological structures and multiple rupture events; significant amounts of elastic strain can be accumulated on geological structures away from the plate boundary faults; and, behavior of contractions and extensions is similar to what has been found in seismological studies. Despite the association between seismic events and the strain of geodetic network, some events of high magnitude were excluded because it does not show the surface strain, which is located at great depths. It was confirmed that events of greater magnitude provide increased surface strain rate when compared with other similar depths.

  17. 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.

  18. CORSI DI STUDIO AD ACCESSO CON VERIFICA DEI SAPERI MINIMI A.A. 2013-2014 CORSO DI LAUREA IN SCIENZE DELLA COMUNICAZIONE

    E-print Network

    Romeo, Alessandro

    CORSI DI STUDIO AD ACCESSO CON VERIFICA DEI SAPERI MINIMI A.A. 2013-2014 CORSO DI LAUREA IN SCIENZE a ripetere la prova. #12;CORSI DI STUDIO AD ACCESSO CON VERIFICA DEI SAPERI MINIMI A.A. 2013-2014 CORSO DI

  19. Si te gusta la msica y deseas formar parte de una orquesta de formacin, no dejes pasar la oportunidad de disfrutar con msicos de diferentes nacio-

    E-print Network

    Escolano, Francisco

    ) y no superar los 35 años de edad - Residir en la Comunidad Valenciana. CRITERIOS DE SELECCIÓN - Ser en mi menor. I Mov.: desde la letra H hasta la K. II Mov.: desde la letra B hasta Moderato con anima ­ Sinfonía No. 5 Op. 64 en mi menor. I Mov.: desde la letra H hasta la K. III Mov.: desde la letra E (con

  20. Applying New Technologies: ANT Automation es una empresa de Automatizacin Industrial, con operaciones en USA, Argentina y Espaa. La empresa est conformada por un slido grupo de

    E-print Network

    Maguitman, Ana Gabriela

    Applying New Technologies: ANT Automation es una empresa de Automatización Industrial, con más de 12 años de experiencia en Software/Automatización Industrial y por nuevos jóvenes talentos con el desarrollo de productos de software industrial: OPC, SCADA, MES, VISION ARTIFICIAL, MODELOS

  1. 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

  2. Storm impacts along European coastlines. Part 1: The joint effort of the MICORE and ConHaz Projects

    Microsoft Academic Search

    Paolo Ciavola; Oscar Ferreira; Piet Haerens; Mark Van Koningsveld; Clara Armaroli; Quentin Lequeux

    2011-01-01

    The current paper discusses the topic of marine storm impact along European coastlines, presenting results from two FP7 Projects currently focusing on this topic, one working on the physical aspects of the problem (MICORE) and the other one on the socio-economic implications (ConHaz).The MICORE Project aims to provide on-line predictions of storm-related physical hazards (hydrodynamic as well as morphodynamic). The

  3. PHA and con A-induced chemiluminescence of human blood mononuclear cells and granulocytes in luminol or lucigenin

    Microsoft Academic Search

    Katalin Merétey; Mariann Antal; Z. Rozsnyay; Ute Böhm; Erzsébet Elekes; Gy. Genti

    1987-01-01

    Phytohemagglutinin (PHA) and concanavaiin A (Con A) can evoke a chemiluminescence (CL) response both in granulocytes and blood mononuclear cells. We have used two parallel systems to compare the quantity and quality of oxygen radicals produced during activation. While the luminol-enhanced CL response is linked to the myeloperoxidase-H2O2-chloride system, the lucigenin-dependent light production measures only the Superoxide radical. PHA produced

  4. 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

    illustrating the deformed Mesozoic forearc basin sediments shown in Figures 37 B-D. 102 37B Profile "A" correlates to the northern extension of the Natuna Arch basement high between the Eastern and Western Nam Con Son sub...-basins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ?. .. . . . . . . . . . . . , . . . . , . . . . . . . . . . . . 103 37C Seismic profile "B" crosses the Natuna Arch south of profile "A" . . . 37D Deformed Mesozoic forearc basin fill south of seismic profiles "A" and "B" 105 38 Eastern margin of the Natuna Arch heading into the East Natuna Basin...

  5. EFFETTO DELL'ORIENTAMENTO DELLE FIBRE SULLA RESISTENZA A FATICA DI UNA POLIAMMIDE 6 RINFORZATA CON FIBRE DI VETRO

    Microsoft Academic Search

    A. Bernasconi; P. Davoli; A. Basile; A. Filippi

    Sommario In questo lavoro vengono presentati i risultati dello studio dell'effetto dell'orientamento delle fibre sulla resistenza a fatica di una poliammide 6. sono state eseguite prove di fatica su provini estratti da lastre ottenute per stampaggio ad iniezione. I provini sino stati ritagliati con diversi orientamenti rispetto all'asse della lastra, in modo da ottenere differenti orientamenti delle fibre di rinforzo

  6. Investigación e innovación en el campo de la vivienda social. Una experiencia desde la investigación en articulación con la docencia

    Microsoft Academic Search

    Gastón Badillos; Roberto Kuri; Horacio Bertuzzi; Fernando Lario

    2007-01-01

    La vivienda con su especialización espacial y constructiva, tal como masivamente se sigue produciendo hoy, no parece ser ya un soporte apto para los múltiples programas que en ella se desarrollan y que cambian en tiempos relativamente cortos.\\u000a\\u000aNo podemos concebir la vivienda como un hecho cerrado sino como un sistema abierto y vivo (evolutivo y adaptable).\\u000a\\u000aEste trabajo reseña

  7. ConReg-R: Extrapolative recalibration of the empirical distribution of p-values to improve false discovery rate estimates

    PubMed Central

    2011-01-01

    Background False discovery rate (FDR) control is commonly accepted as the most appropriate error control in multiple hypothesis testing problems. The accuracy of FDR estimation depends on the accuracy of the estimation of p-values from each test and validity of the underlying assumptions of the distribution. However, in many practical testing problems such as in genomics, the p-values could be under-estimated or over-estimated for many known or unknown reasons. Consequently, FDR estimation would then be influenced and lose its veracity. Results We propose a new extrapolative method called Constrained Regression Recalibration (ConReg-R) to recalibrate the empirical p-values by modeling their distribution to improve the FDR estimates. Our ConReg-R method is based on the observation that accurately estimated p-values from true null hypotheses follow uniform distribution and the observed distribution of p-values is indeed a mixture of distributions of p-values from true null hypotheses and true alternative hypotheses. Hence, ConReg-R recalibrates the observed p-values so that they exhibit the properties of an ideal empirical p-value distribution. The proportion of true null hypotheses (?0) and FDR are estimated after the recalibration. Conclusions ConReg-R provides an efficient way to improve the FDR estimates. It only requires the p-values from the tests and avoids permutation of the original test data. We demonstrate that the proposed method significantly improves FDR estimation on several gene expression datasets obtained from microarray and RNA-seq experiments. Reviewers The manuscript was reviewed by Prof. Vladimir Kuznetsov, Prof. Philippe Broet, and Prof. Hongfang Liu (nominated by Prof. Yuriy Gusev). PMID:21595983

  8. 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.

  9. CHILES Con Pol: Probing galaxy evolution, the dark Universe, and cosmic magnetism with a deep 1000 hour Jansky VLA survey

    NASA Astrophysics Data System (ADS)

    Hales, Christopher A.; Chiles Con Pol Collaboration

    2014-04-01

    We recently started a 1000 hour campaign to observe 0.2 square degrees of the COSMOS field in full polarization continuum at 1.4 GHz with the Jansky VLA, as 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 unprecedented SKA-era sensitivity of 0.7 uJy per 4 arcsecond FWHM beam. Here we present the key goals of CHILES Con Pol, which are to (i) produce a source catalog of legacy value to the astronomical community, (ii) measure differential source counts in total intensity, linear polarization, and circular polarization in order to constrain the redshift and luminosity distributions of source populations, (iii) perform a novel weak lensing study using radio polarization as an indicator of intrinsic alignment to better study dark energy and dark matter, and (iv) probe the unknown origin of cosmic magnetism by measuring the strength and structure of intergalactic magnetic fields in the filaments of large scale structure. The CHILES Con Pol source catalog will be a useful resource for upcoming wide-field surveys by acting as a training set for machine learning algorithms, which can then be used to identify and classify radio sources in regions lacking deep multiwavelength coverage.

  10. Water as an economic good and water tariff design. Comparison between IBT-con and IRT-cap

    NASA Astrophysics Data System (ADS)

    Liu, Junguo; Savenije, Hubert H. G.; Xu, Jianxin

    Although the proclamation of “water as an economic good” has been generally accepted among water resources managers, there are still some debates on the explanation of this topic. In this paper it is argued that different water forms or uses have different kinds of economic value. Even for the same form or use, water economic value can be transferred from one kind to another by interventions. If water is an economic good, water pricing should be recognized as one of the important incentive measures for water demand management. Although the increased block tariffs (IBTs) have become the tariff structure of choice in many developing countries, it still deserves more careful examination. The traditional IBT-con cannot achieve the initial objectives of IBTs for its incorrect designed structure. This paper is intent to critically examine the use of IBT-con and to strongly promote a new tariff structure, IRT-cap. The case study of Weinan City shows that IRT-cap is an effective tariff to achieve the objectives of equity, simplicity, transparency and implement as well. Also IRT-cap seems easier to achieve cost recovery than the traditional IBT-con taking the ability to pay of water consumers into account. Pilot projects are necessary to be formulated for verification of this new tariff.

  11. Dependence of the seal property of ConFlat-type flanges on the fine dimensions of the knife edge

    NASA Astrophysics Data System (ADS)

    Kurokouchi, Satoshi; Shinoda, Satsuo; Morita, Shinsaku

    2003-03-01

    The shape of the sealing face on ConFlat-type flanges has not been addressed at all in the International Standards Organization standards, yet it is the distinct shape of the sealing face on the flange, generally referred to as the "knife edge" that primarily distinguishes the ConFlat sealing system. Results of profiling on the sealing face of 70 mm diameter ConFlat-type flanges, provided by ten individual manufacturers, reveal that while all the sealing faces share a common 20deg angle on the taper face, there are variations in the tip radius of the knife edge, and in the angle of the counterslope against the 20deg taper face. In flange tightening tests using the ConFlat flanges, the tip radius was observed to influence flange penetration into the gasket. It was also determined that the knife edges of all the test flanges were plastically deformed to some extent in the process of tightening twice at a torque of 120 kgf cm. The knife-edge shape was neither found to be dependent on the magnitude of deformation, nor did the deformation have an observable influence on the seal property. In order to closely investigate the dependence of the ConFlat-type flange seal property on the fine shape of its sealing face, four types of 152 mm diameter flanges, each with a different knife-edge shape, were subjected to flange tightening tests. The results indicated that flanges with a small tip radius and a small counterslope angle maintained a satisfactory seal ability, even when applied tightening torque was lower, but had difficulty retaining sealing stability under an elevated temperature. On the other hand, flanges with a large tip radius or large counterslope angle on the knife edge had an advantage in terms of seal stability in baking conditions, but required relatively higher tightening torque to attain secure sealing. To evaluate the tip radius and the counterslope angle at which the flange seal capability and the sealing stability at an elevated temperature are in goo

  12. 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

  13. Anti-human IG and B lymphocytes reconstitute the proliferative response to Con A of T lymphocytes depleted of accessory cells

    SciTech Connect

    Tsuda, T.; Kim, Y.T.; Schwab, R.; Siskind, G.W.; Weksler, M.E.

    1986-03-01

    The requirements for the induction of proliferation of human peripheral blood mononuclear cells (PBM) by low concentrations of Concanavalin A (Con A) were studied using /sup 3/H-thymidine incorporation to assay DNA synthesis. Removal of plastic-adherent cells from PBM reduced the proliferative response of lymphocytes to Con A by 80%. Passage of these cells over nylon wool columns totally eliminated their response to Con A. Addition of adherent monocytes or rabbit anti-human IgG conjugated to polyacrylamide beads (anti-IgG beads) to the non-adherent lymphocyte population reconstituted the proliferative response. The lymphoblasts activated in these cultures were more than 90% T11 positive. Anti-IgG beads did not activate lymphocyte proliferation in the absence of Con A. The response of non-adherent lymphocytes to Con A could also be reconstituted by unconjugated rabbit anti-human IgG antiserium. Purified T cells could only be activated by anti-IgG beads and low concentrations of Con A in the presence of irradiated B cells. These results suggest that /sup 3/H-thymidine incorporation by T cells induced by anti-IgG beads and a low concentration of Con A depends on the interaction of anti-IgG and B cells. The authors suggest that B cell produce growth factors for T cells after interacting with anti-IgG.

  14. Biological effects of Escherichia coli lipopolysaccharide (LPS) in vivo. II. Selection in the mouse thymus of PHA- and con A-responsive cells.

    PubMed Central

    Adorini, L; Ruco, L; Uccini, S; De Franceschi, G S; Baroni, C D; Doria, G

    1976-01-01

    The effect of LPS injection on mouse thymocytes was examined by in vitro stimulation with PHA and Con A. Thymocytes from LPS treated mice were found more responsive than normal thymocytes to PHA and Con A. The increase of responsiveness was different for PHA and Con A, and dependent on the dose of LPS injected. This dose dependency suggests that LPS in vivo modifies the thymocyte population by progressively eliminating T1 cells and selecting T2 cells. These effects seem to be mediated by corticosteroids because they were prevented by adrenalectomy, a finding in agreement with the notion that the injection of cortisone induces similar cell changes in the thymus. PMID:783042

  15. 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. 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.

  16. CORSI DI STUDIO AD ACCESSO CON VERIFICA DEI SAPERI MINIMI A.A. 2013-2014 AREA "LINGUE E LETTERATURE STRANIERE" -PROVA DI LINGUA INGLESE

    E-print Network

    Romeo, Alessandro

    CORSI DI STUDIO AD ACCESSO CON VERIFICA DEI SAPERI MINIMI A.A. 2013-2014 AREA "LINGUE E LETTERATURE STRANIERE" - PROVA DI LINGUA INGLESE Il superamento della prova dei "Saperi Minimi" è condizione necessaria

  17. El seminario consta de dos partes independientes: Una primera parte o Seminario terico con el ttulo Comprendiendo elTDA-H y una segunda

    E-print Network

    Escolano, Francisco

    : · AnalizarlarealidaddelossujetosconTDAH,desdesuprimera infancia hasta la entrada en la edad adultaTDAH. ·Promovercompetenciasenelalumnadoquelespermitadesarrollar las aptitudes de los menores conTDAH, para desenvolverse mejor por las diferentes trayectorias

  18. Es un placer para nosotros compartir con vosotros el I Concurso de Programacin en Visual Cobol que AnyHelp Int. lanza junto a Micro Focus,

    E-print Network

    Rey Juan Carlos, Universidad

    Es un placer para nosotros compartir con vosotros el I Concurso de Programación en Visual Cobol que informática del entorno universitario o de Formación profesional que desarrollen aplicaciones en Visual Cobol

  19. 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

  20. Errores sistemáticos del Catálogo Fundamental FK5, deducidos de las observaciones con Astrolabio Fotoeléctrico PAII, en el Hemisferio Sur

    NASA Astrophysics Data System (ADS)

    Manrique, W. T.; Podestá, R. C.; Alonso, E.; Actis, E. V.; Pacheco, A. M.; Bustos, G.; Lizhi, L.; Zezhi, W.; Fanmiao, Z.; Hongqi, W.; Perdomo, R.; González, A.; Gómez, G.

    Se dan los resultados obtenidos de los Errores Sistemáticos del Catálogo Fundamental FK5, ? ? ?, ? ? ?, ? ? ? y ? ? ?, derivados de las observaciones estelares con el Astrolabio Fotoeléctrico PAII del Observatorio de Beijing instalado en el Observatorio Astronómico ``Félix Aguilar'' de San Juan, de acuerdo al Proyecto de Colaboración entre los observatorios de San Juan, Beijing y La Plata. Se han usado los residuos seleccionados de 11000 estrellas aproximadamente, derivados de más de 400000 pasajes estelares en 1550 días, desde Febrero de 1992 a Marzo de 1997. La precisión media de los residuos es de 0,"043.

  1. Comparison of hydrogenated amorphous silicon germanium and nanocrystalline silicon for multijunction solar cells: pros, cons, and status

    Microsoft Academic Search

    Jeffrey Yang; Baojie Yan; Guozhen Yue; Subhendu Guha

    2005-01-01

    A comparison is made of hydrogenated amorphous silicon germanium (a-SiGe:H) and hydrogenated nanocrystalline silicon (nc-Si:H) for use in the bottom cell of a multijunction structure. In our laboratory, an initial active-area cell efficiency of 14.6% has been achieved in both a-Si:H\\/a-SiGe:H\\/a-SiGe:H and a-Si:H\\/a-SiGe:H\\/nc-Si:H triple-junction structures. Their light-soaked stabilized efficiencies are also similar. Pros, cons, issues, and status for using these

  2. ConPas: a 3-D Conformal Parotid Gland-Sparing Irradiation Technique for Bilateral Neck Treatment as an Alternative to IMRT

    Microsoft Academic Search

    Ruud Wiggenraad; Mirjam Mast; Jan van Santvoort; Marc Hoogendoorn; Henk Struikmans

    2005-01-01

    \\u000a Background and Purpose:  Intensity-modulated radiotherapy (IMRT) is used in most reported techniques for bilateral neck irradiation that aim at parotid\\u000a gland sparing. A relatively simple conformal parotid-sparing technique (ConPas) was developed that uses no beam-intensity modulation. The purpose of this paper is to demonstrate,\\u000a in patients with larynx or hypopharynx carcinoma, that ConPas enables adequate coverage of the primary tumor and

  3. SWINE MANURE PHOSPHORUS USE FOR CROP PRODUCTION IN IOWA

    Microsoft Academic Search

    Antonio P. Mallarino; Monica M. Barbazan; David J. Wittry

    The total P content in manure varies with the animal species, age, and diet and also with the manure storage method. Some manures may have up to 80 to 100 lb P2O5 per ton (some poultry manures, for example) whereas others may contain only 5 to 10 lb P2O5 per ton. The proportions of organic, inorganic, and water-soluble P in

  4. Models of basalt petrogenesis: Lower Keweenawan diabase dikes and middle Keweenawan Portage Lake Lavas, upper Michigan

    Microsoft Academic Search

    John T. Wilband; Pipob Wasuwanich

    1981-01-01

    Lower Keweenawan diabase dikes from Marquette-Baraga Counties, and middle Keweenawan Portage Lake Lavas from upper Michigan, can each be subdivided into two chemically distinct groups: a low TiO2-P2O5 group characterized by higher A12O3 content, higher Mg ratio, and lower total Fe and REE abundances than a high TiO2-P2O5 group. Both groups, which are indistinguishable in the field, are enriched in

  5. Effect of nutrient enrichment on growth of the eelgrass Zostera marina in the Chesapeake Bay, Virginia, USA

    Microsoft Academic Search

    1977-01-01

    The addition of two commerical fertilizers, one 5% NH4NO3, 10% P2O5, 10% K2O, and the other 10% NH4NO3, 10% P2O5, 10% K2O, ahd a dramatic effect on the growth of Zostera marina in the Chesapeake Bay. There was a significant increase in the length, biomass and total number of turions of fertilized plots compared with controls during a 2 to

  6. Characterization and sinterability of chemically precipitated phosphate-bearing magnesia grains

    Microsoft Academic Search

    M. F. M. Zawrah

    2001-01-01

    Two brucite powders having different impurity levels and doped with 0.5 mol% P2O5 were coprecipitated from MgCl2-rich solutions derived from natural magnesite rock. The precipitated powders were characterized for their chemical and mineralogical compositions, thermal analyses and particle size distribution as well as particle morphology. The effect of P2O5 as well as other impurities on densification, phase composition and microstructure

  7. Thermodynamic Measurement of Di-calcium Phosphate

    NASA Astrophysics Data System (ADS)

    Nagai, Takashi; Tanaka, Yusuke; Maeda, Masafumi

    2011-08-01

    The thermodynamic properties of the CaO-P2O5 system are important to develop an effective refining process in the iron and steel industry. In this study, the thermodynamic properties of (CaO)2P2O5 were investigated because the properties are necessary to develop a new dephosphorization process. The vapor of gaseous phosphorus and phosphorus oxide in equilibrium with a mixture of (CaO)2P2O5 and (CaO)3P2O5 at 1373 K to 1498 K (1100 °C to 1225 °C) were detected directly as an ion current by double Knudsen cell mass spectrometry. Comparing the ion currents with those from a mixture of Al2O3P2O5 and Al2O3, which is used as a reference mixture in this study, the Gibbs energy change of the following reaction was calculated: 2{{CaO}}( {{s}} ) + {{ P}}2 ( {{g}} ) + 5/2{{O}}2 ( {{g}} ) = ( {{CaO}} )2 {{P}}2 {{O}}5 ( {{s}} ) Updelta G^{ circ } = - 2180000 + 590T( { ± 28000} ){{J}}.

  8. Ground-state magnetic properties of CoN clusters on Pd(111): Spin moments, orbital moments, and magnetic anisotropy

    NASA Astrophysics Data System (ADS)

    Félix-Medina, R.; Dorantes-Dávila, J.; Pastor, G. M.

    2003-03-01

    The ground-state spin moments , orbital moments , and magnetic anisotropy energy (MAE) of CoN clusters deposited on the Pd(111) surface are determined in the framework of a self-consistent, real-space tight-binding method. Two-dimensional CoN/Pd(111) with N<~13 show remarkably large total magnetic moments per Co atom Mz=(2+)/N=(2.4 2.7)?B, which are the result of three physically distinct effects. The first and leading contribution comes, as expected, from the local spin moments at the Co atoms i=1-N [2Co?1.7?B]. Second, significant spin moments are induced at the Pd atoms i>N close to the Co-Pd interface, which amount to about 20% of Mz [2Pd=(0.2 0.3)?B]. Finally, remarkably enhanced orbital magnetic moments are found that are responsible for approximately 20% of Mz. In the case of Co atoms, Co?(0.3 0.5)?B is almost a factor of 3 larger than the Co-bulk orbital moment, while in Pd atoms Pd=(0.02 0.04)?B represents about 10% of the total local moment ?iz=2+. The dependence of the orbital moments on the orientation of the magnetization with respect to the cluster structure is quantified. These results and the associated MAEs are analyzed from a local point of view. One- and two-dimensional (2D) CoN are considered in order to investigate the structural dependence of the magnetic behavior. The role of the cluster-surface interactions is discussed by comparison with free cluster calculations. In particular, we observe that the lowest-energy magnetization direction (easy axis) changes from in-plane to off-plane upon deposition of 2D CoN on Pd(111). Cluster-substrate hybridizations are therefore crucial for the magnetoanisotropic behavior of magnetic islands deposited on metallic substrates.

  9. Protection from concanavalin A (Con A)-induced T cell-dependent hepatic lesions and modulation of cytokine release in mice by sodium fusidate.

    PubMed

    Nicoletti, F; Beltrami, B; Raschi, E; Di Marco, R; Magro, G; Grasso, S; Bendtzen, K; Fiorelli, G; Meroni, P L

    1997-12-01

    The immunomodulatory effects of the antibiotic sodium fusidate (SF) were tested in a model of T cell-dependent hepatic injury that can be induced in normal mice by a single i.v. injection of Con A. Signs of hepatitis with elevated transaminase activities in plasma, severe infiltration of the liver by neutrophil granulocytes, lymphocytes and monocytes, and necrotic areas were observed in control mice treated intraperitoneally with PBS 24 h and 1 h before Con A challenge. T cell- and macrophage-derived cytokines (IL-2, interferon-gamma (IFN-gamma), tumour necrosis factor-alpha (TNF-alpha, IL-1beta, IL-6) were released with different kinetics in the circulation of these mice. SF, 20, 40 or 80 mg/kg, administered 24 h and 1 h before Con A challenge, protected the mice against the hepatitic effects of Con A. The protective effects of SF were dose-dependent and accompanied by profound modifications of blood levels of cytokines induced by Con A, so that, relative to control mice, SF (80 mg/kg)-treated animals showed markedly diminished plasma levels of IL-2, IFN-gamma and TNF-alpha, along with augmented levels of IL-6. These results suggest that SF might be useful in the treatment of immunoinflammatory liver diseases in humans. PMID:9409654

  10. Protection from concanavalin A (Con A)-induced T cell-dependent hepatic lesions and modulation of cytokine release in mice by sodium fusidate

    PubMed Central

    NICOLETTI, F; BELTRAMI, B; RASCHI, E; DI MARCO, R; MAGRO, G; GRASSO, S; BENDTZEN, K; FIORELLI, G; MERONI, P L

    1997-01-01

    The immunomodulatory effects of the antibiotic sodium fusidate (SF) were tested in a model of T cell-dependent hepatic injury that can be induced in normal mice by a single i.v. injection of Con A. Signs of hepatitis with elevated transaminase activities in plasma, severe infiltration of the liver by neutrophil granulocytes, lymphocytes and monocytes, and necrotic areas were observed in control mice treated intraperitoneally with PBS 24 h and 1 h before Con A challenge. T cell- and macrophage-derived cytokines (IL-2, interferon-gamma (IFN-?), tumour necrosis factor-alpha (TNF-?), IL-1?, IL-6) were released with different kinetics in the circulation of these mice. SF, 20, 40 or 80 mg/kg, administered 24 h and 1 h before Con A challenge, protected the mice against the hepatitic effects of Con A. The protective effects of SF were dose-dependent and accompanied by profound modifications of blood levels of cytokines induced by Con A, so that, relative to control mice, SF (80 mg/kg)-treated animals showed markedly diminished plasma levels of IL-2, IFN-? and TNF-?, along with augmented levels of IL-6. These results suggest that SF might be useful in the treatment of immunoinflammatory liver diseases in humans. PMID:9409654

  11. 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

  12. 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

  13. ON EFFECT OF HAZARD MAP ON CONS CIOUSNESS OF FLOOD DISASTER PREVENSION OF RESIDENTS WHO EXPERIENCED FLOOD RECENTLY

    NASA Astrophysics Data System (ADS)

    Asai, Koji; Koga, Syota; Sakakibara, Hiroyuki

    In this paper, the effect of the flood hazard map distributed to the residents who experienced flood disasters recently and an effective method for improving consciousness of flood di saster prevention are discussed. The questionnaire surveys were conducted on the residents living in the middle basin of the Nishiki River, Iwakuni city, Yamaguchi Prefecture, before and after the distribution of the hazard map. It is found from this investigation that "knowledge", "att achment", and "crisis", are the main factors in the psychological process related to the flood prevention behavior. The effect of the distribution of the hazard map is judged from the probability of the flood prevention behavior. In addition, it is also found that "knowledge", "flood experiment of T0514", "crisis", "eff ectiveness", "load", and "easy reading of the hazard map", are keys to improve the cons ciousness of flood di saster prevention.

  14. The role of the HyCon design-support tool in elevating hybrid concrete as a design option for structural frames

    Microsoft Academic Search

    Martin Sexton; Jack Goulding; Xiaonan Zhang; Mike Kagioglou; Ghassan Aouad; Rachel Cooper; Peter Barrett

    2005-01-01

    Purpose – The purpose of this paper is to identify interdependent barriers to the search and selection of new technologies by design engineers at industry, organisation and individual levels. A “proof of concept” HyCon tool is presented to demonstrate the role of information technology design support tools in supporting designers to overcome these inhibitors, in this case for hybrid concrete,

  15. AbstractThe Kern River Gas Transmission pipeline was con-structed in 1991 to supply natural gas to be used in the thermally

    E-print Network

    94 Abstract­The Kern River Gas Transmission pipeline was con- structed in 1991 to supply natural plants were found in the 11 seeded plots. The Kern River Gas Transmission pipeline (KRGT) was constructed California. The pipeline route extended from a point near Opal, Wyoming, through Utah and Nevada to Daggett

  16. EECE Department Seminar After completing a BS degree in Chemistry from Florida State University, David joined Dow in 1981. He con-

    E-print Network

    Subramanian, Venkat

    : elementary reaction based kinetic modeling, computational fluid dynamics, and bifurcation analysis. In his University, David joined Dow in 1981. He con- tributed to the development of a wide variety of process in Corporate R&D labs including Reaction Engineering, Fluid Me- chanics and Mixing, Modeling, and Materials

  17. Texas A&M AgriLife Extension Service Cmo prevenir el asma6 Si el asma de su nio empeora con emociones intensas,

    E-print Network

    Texas A&M AgriLife Extension Service Cómo prevenir el asma6 Si el asma de su niño empeora con contra el asma no controlan bien los ataques durante estos periodos emotivos, háblele a su pediatra sobre cabello pueden desencadenar un ataque de asma. Medidas de control incluyen: Cuando deba usar productos

  18. 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

  19. 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

    Weaver, Harold A. "Hal"

    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

  20. Departamento de Disciplinas Econmicas y Financieras El Departamento de Disciplinas Econmicas y Financieras, con sede en la Facultad de Derecho de la Universidad

    E-print Network

    Escolano, Francisco

    Financieras, con sede en la Facultad de Derecho de la Universidad de Alicante, está compuesto por el área de conocimiento de Derecho Financiero y Tributario que centra su actividad en las facultades de Derecho, Ciencias: Estudios de 1er y 2º Ciclo (a extinguir) Licenciatura en Derecho. Licenciatura Derecho-ADE (DADE

  1. BANDO DI CONCORSO PER L'ASSEGNAZIONE DI N.7 POSTI (DI CUI N.5 CON BORSA DI STUDIO) PER LA FREQUENZA DI CORSI DI LINGUA, LETTERATURA E

    E-print Network

    Guidoni, Leonardo

    DI CORSI DI LINGUA, LETTERATURA E CULTURA RUSSA PRESSO L'UNIVERSITA' STATALE "M. LOMONOSOV" DI MOSCA superato l'esame di lingua russa del primo anno da 12 CFU con votazione non inferiore a 25/30; · · essere studenti di lingua madre russa o di altri paesi che facevano parte dell'Unione Sovietica. ART. 3 ­ La

  2. Discurso de Orden con motivo de la Celebración del XXX Aniversario de la Facultad de Economía de la Universidad de Los Andes

    Microsoft Academic Search

    Armando Alarcón Fernández

    1988-01-01

    Estamos aquí al abrigo de este sobrio y glorioso recinto, póstumo vestigio de las candelas federales, con la venia de esta audiencia, luminosa expresión del pueblo en sus dos más genuinas representaciones: la Asamblea Legislativa y el Consejo de esta prócera ciudad de Mérida. Nos hemos congregado para hacer memoria del acto académico mediante el cual fue creada la Facultad

  3. ConSoil 2005 -Abstract form Title of abstract Alcohol Flushing: Parameter Estimation for a cost efficient in-situ remediation

    E-print Network

    Cirpka, Olaf Arie

    is necessary to counteract gravitatinal forces. The change of the interfacial tension as a function of alcoholConSoil 2005 - Abstract form Title of abstract Alcohol Flushing: Parameter Estimation for a cost.greiner@iws.uni-stuttgart.de Phone +49 - 711 / 685 4602 Fax +49 - 711 / 685 7020 Topics: Alcohol flushing, in-situ remediation

  4. Synthesis, growth, structural, spectral, thermal, chemical etching, linear and nonlinear optical and mechanical studies of an organic single crystal 4-chloro 4-nitrostilbene (CONS): a potential NLO material.

    PubMed

    Dinakaran, Paul M; Kalainathan, S

    2013-07-01

    4-Chloro 4-nitrostilbene (CONS) a new organic nonlinear optical material has been synthesized. Employing slow evaporation method, good optical quality single crystals (dimensions up to 6×2×3 mm(3)) have been grown using ethyl methyl ketone (EMK) as a solvent. The grown crystals have been subjected to various characterizations such as single crystal X-ray diffraction, powder XRD, Fourier Transform Infrared spectroscopy (FTIR), proton NMR, solid UV absorption, SHG studies. Single crystal X-ray diffraction reveals that the crystal system belongs to monoclinic with noncentrosymmetric space group P21. The UV-Vis absorption spectrum has been recorded and found that the cut off wavelength is 380 nm. Functional groups and the structure of the title compound have been confirmed by FTIR and (1)H NMR spectroscopic analyses respectively. Molecular mass of the CONS confirmed by the high resolution mass spectral analysis .The thermal behavior of the grown crystal has been studied by TG/DTA analysis and it shows the melting point is at 188.66 °C. Dislocations and growth pattern present in the grown crystal revealed by the etching study. The mechanical strength of the CONS crystal has been studied by Vicker's hardness measurement. The SHG efficiency of the grown crystal has been determined by Kurtz and Perry powder test which revealed that the CONS crystal (327 mV) has 15 times greater efficiency than that of KDP (21.7 mV). PMID:23624038

  5. To be presented at the Fourth International Workshop on Virtual Rehabilitation, Catalina Island, CA, September 2005. Usability of the Remote Console (ReCon) for Virtual Reality

    E-print Network

    New Jersey, University of Medicine and Dentistry of

    , September 2005. Usability of the Remote Console (ReCon) for Virtual Reality Telerehabilitation: Formative. Keywords virtual reality, telerehabilitation, physical therapy, formative evaluation, usability engineering for virtual reality telerehabilitation from a host site to a clinic or a home using real-time patient

  6. Evaluación de estimadores no paramétricos de la riqueza de especies. Un ejemplo con aves en áreas verdes de la ciudad de Puebla, México

    Microsoft Academic Search

    J. A. González Oreja; A. A. De la Fuente-Díaz-Ordaz; L. Hernández-Santín; D. Buzo-Franco; C. Bonache-Regidor

    2010-01-01

    Nuestro objetivo fue evaluar el desempeño de estimadores no paramétricos de la riqueza de especies con datos reales. Durante la temporada de cría de 2003 censamos las comunidades de aves en dos áreas verdes de la ciudad de Puebla (México), y obtuvimos las corres¬pondientes curvas de rarefacción, que fueron ajustadas a dos funciones de acumulación de especies no asintóticas y

  7. RELLENAR EN MAYSCULAS A MQUINA, ORDENADOR O CON BOLGRAFO NEGRO Y LETRA DE IMPRENTA. PRESENTAR ORIGINAL Y COPIA. IMPRESO GRATUITO. PROHIBIDA SU VENTA EX 16

    E-print Network

    Geffner, Hector

    ciudadano de la Unión SUPUESTOS DE ACCESO Cónyuge Pareja registrada Descendiente menor de 21 años o incapaz la edad de jubilación con derecho a pensión Trabajador que acceda a la jubilación anticipada

  8. Características psicométricas de las versiones americana y española de la escala TDA-H (Trastorno por Déficit de Atención con Hiperactividad): un estudio comparativo

    Microsoft Academic Search

    Nekane Balluerka; Juana Gómez; William A. Stock; Linda C. Caterino

    2000-01-01

    El presente artículo se centra en el estudio psicométrico de una es- cala para el diagnóstico del Tr a s t o rno por Déficit de Atención con H i p e ra c t ividad en adultos. Dicho tra s t o rno fue descubierto a pri n c i- pios de siglo en la población infantil por un

  9. MODELO MATEMÁTICO PARA EL ORDENAMIENTO DE TAREAS EN UN FLOW-SHOP HÍBRIDO A DOS ETAPAS CON UNA RESTRICCIÓN DE BLOQUEO PARTICULAR

    Microsoft Academic Search

    Sergio Martínez de la Piedra

    2006-01-01

    Este artículo presenta un modelo de programación lineal en números enteros mixtos, el cual, puede ser utilizado para resolver el problema de minimización del tiempo total de paso de un grupo de tareas por un sistema de producción tipo Flow-Shop híbrido a dos etapas sin capacidad de almacenamiento entre ellas y con una nueva restricción de bloqueo, la cual, ha

  10. El viaje a Grecia, o una novela didáctica digital con videoquest, profesor virtual, cuestionarios interactivos ilustrados, blog, wiki y otros recursos TIC

    Microsoft Academic Search

    Manuel Merlo Fernández; Gonzalo Trespaderne Arnaiz

    2010-01-01

    Manuel Merlo Fernández y Gonzalo Trespaderne Arnaiz obtuvieron un Segundo Premio Nacional en el concurso para materiales educativos en soporte electrónico convocado por el Ministerio de Educación a través del CNICE (ahora ITE) y el Premio especial por fomentar la competencia lectora en 2006 con Los caminos de la felicidad. Al año siguiente consiguieron el Primer Premio en el mismo

  11. Animaciones en 3D en tiempo real para las clases de ciencias e ingeniería: Ejemplos desarrollados con el módulo de programación VPython

    Microsoft Academic Search

    Eduardo E. Rodríguez

    RESUMEN: Se describe el uso del módulo de programación VPython para desarrollar animaciones en 3D por computadora para ilustrar temas de interés para las clases. Mostramos la utilidad del uso de animaciones para reforzar las presentaciones de materias como física y matemática, entre otras. Con tales presentaciones se puede innovar en el desarrollo de las clases de ciencias e ingeniería

  12. Decreto n. 368 IL RETTORE VISTO il D.R. n. 4322 in data 12/11/2013, parzialmente modificato con D.R. n. 4571 in data

    E-print Network

    Malerba, Donato

    'art. 7 del DR 4322/2013, in data 3 febbraio 2014; VISTA nota in data 4/2/2014 con cui la candidata CIARDO ROSELLI Giovanna e CIARDO Carmela sono ammesse a sostenere la prova scritta poiché collocate ROSELLI Giovanna e CIARDO Carmela, collocate, rispettivamente, al posto n. 81 e al posto n. 84 della

  13. 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 of Engineering. cAmerican Society for Engineering Education, 2011 #12;Wireless-Integrated Embedded Real-Time in areas of control and embedded systems that weaves critical aspects of control systems design with real-time

  14. DESARROLLO Y APLICACIÓN DE LECCIONES DE ESTADÍSTICA EN-LÍNEA CON OBJETOS DE APRENDIZAJE EN UN AMBIENTE UNIVERSITARIO PEDAGOGICAL IMPACT OF CONSTRUCTIVIST LEARNING OBJECTS IN STATISTIC TEACHING

    Microsoft Academic Search

    Javier Organista Sandoval; Gilles Lavigne

    2006-01-01

    Resumen: Se presentan resultados preliminares de una investigación-desarrollo que tuvo el propósito de desarrollar lecciones de Estadística en línea con inserción de objetos de aprendizaje y estimar el efecto sobre el aprendizaje de los alumnos participantes en un ambiente natural universitario. Se utilizaron señalamientos teóricos constructivistas para el desarrollo de las lecciones, para conformarle al estudiante un ambiente en línea

  15. 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

  16. 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

  17. El gasto en salud y su relación con el ingreso, la escolaridad y el tipo de vinculación al sistema general de seguridad social: evidencia para el depa

    Microsoft Academic Search

    Armando Antonio Gil Ospina; Hedmann Alberto Sierra Sierra

    2006-01-01

    El objetivo principal de este trabajo es explicar cómo se relaciona el gasto en salud con el ingreso, la escolaridad y el tipo de afiliación de las personas al sistema general de seguridad social en salud en el departamento del Risaralda. Se realiza una revisión de la literatura que sirve como base teórico-conceptual y se propone, a manera de hipótesis,

  18. 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.

  19. 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.

  20. Aprendiendo con Veronica.

    ERIC Educational Resources Information Center

    McDonald-O'Brien, Pat

    1996-01-01

    Describes how an elementary school literacy specialist worked with and saw the dilemmas, frustrations, and heartaches of a new student from Puerto Rico. Notes that the literacy specialist learned valuable lessons and gained an appreciation for the need to honor and celebrate, engage and instruct all students from all over the globe. (SR)

  1. 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…

  2. 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.

  3. 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,…

  4. urban ConAgraculture

    Microsoft Academic Search

    Dale J Luebbert

    2009-01-01

    Current pressures in today’s world caused me to investigate strategies of change in the organization of society to promote a more effi cient existence. Globalization, a movement characterized by the dissemination of economies, ethnicities, media, ideas, technologies, and production; has become today’s reality. The shift from imperialism to globalism has caused a decline in the power and importance of nation

  5. Long-term fertility control in female cats with GonaCon™, a GnRH immunocontraceptive.

    PubMed

    Levy, Julie K; Friary, John A; Miller, Lowell A; Tucker, Sylvia J; Fagerstone, Kathleen A

    2011-11-01

    The uncontrolled reproduction of free-roaming feral cats contributes to overpopulation and associated concerns regarding their welfare and impact on public health and the environment. Nonsurgical fertility control that could be administered to feral cats in the field would be a powerful tool for cat population control. The objective was to test the efficacy and duration of activity of a single-dose GnRH immunocontraceptive vaccine (GonaCon™) on the fertility of adult female laboratory cats. Vaccinated cats (n = 15) received a single injection of vaccine containing a GnRH-KLH conjugate (200 ?g) emulsified in a mycobacterial and oil adjuvant on study Day 0. Sham-treated cats (n = 5) received a single injection containing all vaccine components except the GnRH-KLH conjugate. A breeding trial started on study Day 120. Vaccinated cats had a longer time to conception (median 39.7 mo) compared to sham-treated cats (4.4 mo; P < 0.001). A total of 93% of vaccinated cats remained infertile for the first year following vaccination, whereas 73, 53, and 40% were infertile for 2, 3, and 4 y, respectively. At study termination (5 y after a single GnRH vaccine was administered), four cats (27%) remained infertile. The GnRH antibody titers declined more rapidly in short-term responding cats with < 2 y of infertility (n = 4), compared to long-term responding cats that experienced fertility control for >2 y (n = 11) (P < 0.05). Non-painful but persistent late-onset granulomatous injection site masses appeared 2 y after initial vaccination in five cats. We concluded that GnRH immunocontraception is an ideal candidate for further development for feral cat control. PMID:21835455

  6. Accessory cell function in the Con A response: role of Ia-positive and Ia-negative accessory cells.

    PubMed

    Bekoff, M; Kakiuchi, T; Grey, H M

    1985-03-01

    We have examined the role of Ia-positive and Ia-negative accessory cells (AC) and soluble factors in Con A-stimulated murine T cell activation. Supernatant fluids containing interleukin 1 (IL 1) derived from the P388D1 macrophage cell line and from a lipopolysaccharide (LPS)-stimulated macrophage hybridoma provided only partial reconstitution of the response of purified T cells (18 to 27%). The complete reconstitution obtained with gamma-irradiated spleen cells or LPS-activated B cells was inhibited by approximately 60 to 77% when anti-Ia antibody was included in the culture. Despite this apparent involvement of Ia+ spleen AC, Ia-negative L cell AC could also reconstitute the response of both Class I-restricted Lyt-2+ T cells and Class II-restricted L3T4+ T cells. When the Ia-negative AC were employed, the L3T4 antigen on L3T4+ T cells played a critical role because addition of anti-L3T4 antibody to the culture inhibited the response by 85 to 90%. In contrast, anti-L3T4 did not inhibit the response in the presence of spleen AC. These results suggest that the molecules involved in T cell-AC interactions may vary depending on the AC source. Moreover, at least one of the putative target ligands for L3T4 presumably is not Ia, because anti-L3T4 inhibited T cell stimulation when Ia-negative AC were used. PMID:3881521

  7. L'assemblea dei docenti e del personale dell'Ateneo genovese, riunita nell'Aula magna il 23 ottobre 2008, con la partecipazione del Rettore magnifico uscente e di

    E-print Network

    Mascardi, Viviana

    L'assemblea dei docenti e del personale dell'Ateneo genovese, riunita nell'Aula magna il 23 ottobre 2008, con la partecipazione del Rettore magnifico uscente e di quello entrante, dei rappresentanti lamentele sul carattere menzognero dei media e con moniti sinistri ai responsabili dell'informazione; CHIEDE

  8. Misurare il vissuto depressivo con uno strumento self-report: il Differentieller Depressions Fragebogen (DDF) Measuring the depressive experience with a self-report measure: the Differentieller Depressions Fragebogen (DDF)

    Microsoft Academic Search

    M. Giannini; A. Gori; C. Bocali; P. Steck

    2008-01-01

    Summary Background This study aims to test the psychometric properties of the Italian version of a ques- tionnaire developed to assess different aspects of depression: the Differentieller Depressions Fragebogen (DDF). The DDF is a self-report questionnaire con- sisting of 76 dichotomous (true\\/false) items distributed over six scales that con- sent a rapid and accurate assessment of depression. The dimensions of

  9. The Protective Effect of Intrasplenic Transplantation of Ad-IL-18BP/IL-4 Gene-Modified Fetal Hepatocytes on ConA-Induced Hepatitis in Mice

    PubMed Central

    Xu, Chenhuai; Hong, Bo; Xu, Wanhong; Shen, Ling; Jin, Changzhong; Wu, Zhigang; Tong, Xiangmin; Yao, Hangping

    2013-01-01

    Background Concanavalin A (ConA)-induced hepatitis is an experimental murine model mirroring the pathology of human autoimmune hepatitis. Aim To investigate the effects of intrasplenically transplanted fetal hepatocytes (BNL.CL2) transfected with recombinant adenovirus vector expressing the IL-18 binding protein (IL-18BP) and IL-4 fusion protein on ConA-induced hepatitis in mice. Methods Ad-IL-18BP/IL-4 was used to infect BNL.CL2 cells. IL-4 and IL-18BP fusion protein expression were detected by ELISA and Western blotting. BNL.CL2 cells infected with Ad-IL-18BP/IL-4 were intrasplenically transplanted into mice. After 10 days, mice were injected with ConA (15 mg/kg), and sacrificed 18 hours later. Liver injury was assessed by serum transaminase and liver histology. TNF-?, IL-18, IL-4, IL-10, IL-12p70 and monocyte-chemoattracting protein (MCP)-1 levels in serum and liver homogenates were detected by ELISA. Signaling molecules in liver homogenates were analyzed by Western blotting. Results Ad-IL-18BP/IL-4 effectively expressed the IL-18BP/IL-4 fusion protein for more than 14 days in BNL.CL12 cells. Treatment of mice with Ad-IL-18BP/IL-4-BNL.CL2 before ConA injection significantly reduced the elevated plasma levels of transaminases compared with ConA control groups. TNF-?, IL-18, IL-12p70 and MCP-1 levels in serum and liver homogenates from mice transplanted with Ad-IL-18BP/IL-4-BNL.CL2 were lower and IL-4 and IL-10 levels were higher than control groups. Phosphorylation levels of NF-?B p65, AKT, p38 and JNK1/2 in liver homogenates were markedly suppressed by Ad-IL-18BP/IL-4. Conclusions Ad-IL-18BP/IL-4 was effectively transfected into mouse BNL.CL2 cells. Intrasplenic transplantation of Ad-IL-18BP/IL-4-BNL.CL12 cells alleviated the severity of inflammation in ConA-induced experimental hepatitis and provides a useful basis for the targeted gene therapy of liver disease. PMID:23516562

  10. Effects of NH3 flow rate on the epitaxial growth of CoSi2 thin film using a CoN x interlayer deposited by MOCVD

    NASA Astrophysics Data System (ADS)

    Lee, Seung Ryul; Ahn, Byung Tae; Kang, Bo Soo

    2015-06-01

    A uniform epitaxial CoSi2 layer could be grown on a Si(100) substrate by deposition of a CoN x interlayer followed by an in situ annealing process. The amorphous Si-N layer which is formed at the CoN x /Si interface plays a role in inhibiting excessive Co incorporation into Si layer and consequently enhancing the epitaxial growth of CoSi2 layer. However, the Si-N layer also limits the growth of thick CoSi2 layer. Therefore, the thickness of the amorphous Si-N layer is an important factor for the epitaxial growth of the CoSi2 layer with uniform structure and low sheet resistance.

  11. Methanol extract of Biophytum sensitivum alters the cytokine profile and inhibits iNOS and COX-2 expression in LPS/Con A stimulated macrophages.

    PubMed

    Guruvayoorappan, Chandrasekharan; Kuttan, Girija

    2008-01-01

    Biophytum sensitivum has been used in traditional folk medicine to treat numerous diseases. The molecular mechanism of B. sensitivum pharmacological and biochemical actions of macrophages in inflammation has not been clearly elucidated. We examined how the methanol extract of B. sensitivum regulates the production of interleukin (IL)-1beta, tumor necrosis factor (TNF)-alpha, IL-6, and nitric oxide (NO) in vitro and in vivo. The extract inhibits the production of NO and proinflammatory cytokines in lipopolysaccharide (LPS) or Concanavalin (Con) A-stimulated primary macrophages. In vitro L929 bioassay revealed the inhibition of TNF-alpha production by B. sensitivum treatment. Moreover, the extract could suppress the inducible nitric oxide synthase and cyclo-oxygenase-2 mRNA expression in LPS or Con A-stimulated macrophages. These findings provide evidence that B. sensitivum possesses potential anti-inflammatory activity and may be beneficial for the treatment of endotoxin shock or sepsis. PMID:18161516

  12. 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

  13. EDIFICI E CULTI Di un altro edificio a carattere pubblico si ha un possibile indizio nel decretoA1, con la menzione della concessione

    E-print Network

    Abbondandolo, Alberto

    essere dotata, e che è probabilmente da localizzare nei pressi dell'agora e dei principali edifici città siceliota: planimetria dell'agora di Iaitas con i due bouleuteria (fine del IV sec. a.C. e ultimo.C.). Pianta del bouleuterion di Segesta (fine II a.C.). l'area dell'agora (cf. ENTELLA: LA CITT�) e che si

  14. 98 VHDL: LENGUAJE PARA S INTESIS Y MODELADO DE CIRCUITOS c En una funcion, y siempre con caracter opcional e informativo, existe la posibilidad

    E-print Network

    Valencia, Universidad de

    98 VHDL: LENGUAJE PARA S â?? INTESIS Y MODELADO DE CIRCUITOS c RA­MA En una funciâ??on, y siempre con carâ??acter opcional e informativo, existe la posibilidad de declararla como PURE o IMPURE. Un funciâ??on pura es una funciâ??on que devuelve siem­ pre el mismo valor para unos parâ??ametros de entrada dados. Una

  15. 1.0 What is Statistics? 1.1 What is Mathematical Statistics? Random Data Basic Ideas in Statistics 1.2 Fundamental Con Mathematical Statistics

    E-print Network

    Zhang, Li-Xin

    §1.0 What is Statistics? §1.1 What is Mathematical Statistics? Random Data Basic Ideas in Statistics §1.2 Fundamental Con Mathematical Statistics Zhang, Lixin and Dai, Jialing Course Website: www.math.zju.edu.cn/zlx/teaching.htm #12;§1.0 What is Statistics? §1.1 What is Mathematical Statistics? Random Data Basic Ideas

  16. HOW TO geT TOTHe MANOA &OOK5TORe PURIN9 THe CAMPU5 ceNTeR CON5TRUCTION.

    E-print Network

    HOW TO geT TOTHe MANOA &OOK5TORe PURIN9 THe CAMPU5 ceNTeR CON5TRUCTION. TAICES TtiES 9TAIRWAY"'U"llH;- (., ntfT ACCE:%I~L.E! F~OMF,,~ ·.w, THE: ~E:CONP FL.OO~ OF CAMPU~ CE:NTE:~ VIA THE: ~TAI~WAY LYOU CAN AL.~O E:NTE:~ Sc'd~,ho :\\I.uliott THE: G~OUNP L.E:VE:L. E!NT~ANCE: TH~OUGH THE: TE:MPO~A~Y WAL

  17. 15-Deoxy-?12,14-prostaglandin J2 Reduces Liver Impairment in a Model of ConA-Induced Acute Hepatic Inflammation by Activation of PPAR? and Reduction in NF-?B Activity

    PubMed Central

    Chen, Kan; Li, Jingjing; Wang, Junshan; Xia, Yujing; Dai, Weiqi; Wang, Fan; Shen, Miao; Cheng, Ping; Zhang, Yan; Wang, Chengfen; Yang, Jing; Zhu, Rong; Zhang, Huawei; Zheng, Yuanyuan; Lu, Jie; Fan, Zhuoyi; Zhou, Yingqun; Guo, Chuanyong

    2014-01-01

    Objective. 15-Deoxy-?12,14-prostaglandin J2 (15d-PGJ2) reduces inflammation and has been identified as an anti-inflammatory prostaglandin in numerous animal models. In this study, we investigated both effects of 15d-PGJ2 and its protection mechanism in concanavalin A- (ConA-) induced autoimmune hepatitis in mice. Materials and Methods. In vivo, Balb/C mice were injected with ConA (25?mg/kg) to induce acute autoimmune hepatitis, and 15d-PGJ2 (10??g or 25??g) was administered 1?h before the ConA injection. The histological grade, proinflammatory cytokine levels, and NF-?B and PPAR? activity were determined 6, 12, and 24?h after the ConA injection. In vitro, LO2 cells and RAW264.7 cells were pretreated with 15d-PGJ2 (2??M) 1?h before the stimulation with ConA (30??g/mL). The NF-?B and PPAR? activity were determined 30?min after the ConA administration. Results. Pretreatment with 15d-PGJ2 reduced the pathological effects of ConA-induced autoimmune hepatitis and significantly reduced the levels of cytokines after injection. 15d-PGJ2 activated PPAR?, blocked the degradation of I?B?, and inhibited the translocation of NF-?B into the nucleus. Conclusion. These results indicate that 15d-PGJ2 protects against ConA-induced autoimmune hepatitis by reducing proinflammatory cytokines. This reduction in inflammation may correlate with the activation of PPAR? and the reduction in NF-?B activity. PMID:25120564

  18. On the role of localized surface plasmon resonance in UV-Vis light irradiated Au/TiO? photocatalysis systems: pros and cons.

    PubMed

    Lin, Zhongjin; Wang, Xiaohong; Liu, Jun; Tian, Zunyi; Dai, Loucheng; He, Beibei; Han, Chao; Wu, Yigui; Zeng, Zhigang; Hu, Zhiyu

    2015-03-01

    The role of localized surface plasmon resonance (LSPR) in UV-Vis light irradiated Au/TiO2 photocatalysis systems has been investigated, and it is demonstrated experimentally for the first time that both pros and cons of LSPR exist simultaneously for this photocatalytic reaction. We have proved that when operating under mixed UV and green light irradiation, the LSPR injected hot electrons (from the Au nanoparticles to TiO2 under green light irradiation) may surmount the Schottky barrier (SB) formed between the Au nanoparticles and TiO2, and flow back into the TiO2. As a result, these electrons may compensate for and even surpass those transferred from TiO2 to the Au nanoparticles, thus accelerating the recombination of UV excited electron-hole pairs in TiO2. This is the negative effect of LSPR. On the other hand, more hot electrons existing on the surface of the Au nanoparticles due to LSPR would favor the photocatalytic reaction, which accompanied by the negative effect dominates the overall photocatalytic performance. The presented results reveal the multi-faceted essence of LSPR in Au/TiO2 structures, and is instructive for the application of metal-semiconductor composites in photocatalysis. Moreover, it is confirmed that the extent to which the above pros and cons of LSPR dominate the overall photocatalytic reaction depends on the intensity ratio of visible to UV light. PMID:25665512

  19. 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

  20. 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

  1. Genes related to the very early stage of ConA-induced fulminant hepatitis: a gene-chip-based study in a mouse model

    PubMed Central

    2010-01-01

    Background Due to the high morbidity and mortality of fulminant hepatitis, early diagnosis followed by early effective treatment is the key for prognosis improvement. So far, little is known about the gene expression changes in the early stage of this serious illness. Identification of the genes related to the very early stage of fulminant hepatitis development may provide precise clues for early diagnosis. Results Balb/C mice were used for ConA injection to induce fulminant hepatitis that was confirmed by pathological and biochemical examination. After a gene chip-based screening, the data of gene expression in the liver, was further dissected by ANOVA analysis, gene expression profiles, gene network construction and real-time RT-PCR. At the very early stage of ConA-triggered fulminant hepatitis, totally 1,473 genes with different expression variations were identified. Among these, 26 genes were finally selected for further investigation. The data from gene network analysis demonstrate that two genes, MPDZ and Acsl1, localized in the core of the network. Conclusions At the early stages of fulminant hepatitis, expression of twenty-six genes involved in protein transport, transcription regulation and cell metabolism altered significantly. These genes form a network and have shown strong correlation with fulminant hepatitis development. Our study provides several potential targets for the early diagnosis of fulminant hepatitis. PMID:20398290

  2. A self-ordered, crystalline glass, mesoporous nanocomposite with high proton conductivity of 2 x 10(-2) S cm-1 at intermediate temperature.

    PubMed

    Yamada, Masanori; Li, Donglin; Honma, Itaru; Zhou, Haoshen

    2005-09-28

    We prepared a TiO2-P2O5 self-ordered, crystalline glass, mesoporous nanocomposite (CGMN) with water-holding capacity at an intermediate temperature region (130-200 degrees C). This TiO2-P2O5 CGMN showed the high proton conductivity of 2 x 10-2 S cm-1 at 160 degrees C under fully saturated humidification conditions (100% RH). Additionally, these conductivities were stable at intermediate temperature conditions. The TiO2-P2O5 CGMN may have a potential not only for the fuel cell electrolytes operated at intermediate temperature conditions but also for electrochemical devices, including electrochromic displays, chemical sensors, lithium rechargeable batteries, and others. PMID:16173706

  3. The effect of titanium and phosphorus on ferric/ferrous ratio in silicate melts: an experimental study

    NASA Astrophysics Data System (ADS)

    Borisov, Alexander; Behrens, Harald; Holtz, Francois

    2013-12-01

    The effect of TiO2 and P2O5 on the ferric/ferrous ratio in silicate melts was investigated in model silicate melts at air conditions in the temperature range 1,400-1,550 °C at 1-atm total pressure. The base composition of the anorthite-diopside eutectic composition was modified with 10 wt % Fe2O3 and variable amounts of TiO2 (up to 30 wt %) or P2O5 (up to 20 wt %). Some compositions also contained higher SiO2 concentrations to compare the role of SiO2, TiO2, and P2O5 on the Fe3+/Fe2+ ratio. The ferric/ferrous ratio in experimental glasses was analyzed using a wet chemical technique with colorimetric detection of ferrous iron. It is shown that at constant temperature, an increase in SiO2, TiO2, and P2O5 content results in a decrease in the ferric/ferrous ratio. The effects of TiO2 and SiO2 on the Fe3+/Fe2+ ratio was found to be almost identical. In contrast, adding P2O5 was found to decrease ferric/ferrous ratio much more effectively than adding silica. The results were compared with the predictions from the published empirical equations forecasting Fe3+/Fe2+ ratio. It was demonstrated that the effects of TiO2 are minor but that the effects of P2O5 should be included in models to better describe ferric/ferrous ratio in phosphorus-bearing silicate melts. Based on our observations, the determination of the prevailing fO2 in magmas from the Fe3+/Fe2+ ratio in natural glasses using empirical equations published so far is discussed critically.

  4. 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.

  5. Do the Symptom-Based, Rome Criteria of Irritable Bowel Syndrome Lead to Better Diagnosis and Treatment Outcomes? The Con Argument

    PubMed Central

    Camilleri, Michael

    2009-01-01

    Some claim that symptom-based Rome criteria are diagnostic and enhance clinical practice and choice of therapy for patients presenting with gastrointestinal symptoms. This overview focuses on lower gastrointestinal symptoms: constipation, diarrhea, pain and bloating. The main con arguments for using such criteria for diagnosis are: insufficient specificity, overlap of symptom-based categories or disorders, insufficient and therefore non-specific characterization of pain in the criteria, inability to differentiate the “mimics” of IBS-C and IBS-D, and inability to optimize treatment for IBS-M or bloating in the absence of objective measurements. While doctors may not land in trouble using “symptom diagnosis” of IBS, this should not deter them from optimizing diagnosis and treatment of diseases associated with gastrointestinal dysfunction. PMID:20182528

  6. Studies of crystal phase formations in high-strength lithium disilicate glass–ceramics

    Microsoft Academic Search

    W. Holand; E. Apel; Ch. van ‘t Hoen; V. Rheinberger

    2006-01-01

    The objective of the study was to analyze the nucleation, primary phase formation and solid state reaction to form lithium disilicate glass–ceramics derived from the SiO2–Li2O–Al2O3–K2O–ZrO2–P2O5 system. The concentration of P2O5 was increased from zero up to 3.2wt%. Thermal analysis, scanning electron microscopy and X-ray diffraction were used to characterize the microstructure formation, the nucleation process and the solid state

  7. KTiOPO 4 precipitation from potassium titanium phosphate glasses, producing second harmonic generation

    Microsoft Academic Search

    V. N. Sigaev; P. Pernice; A. Aronne; O. V. Akimova; S. Yu. Stefanovich; A. Scaglione

    2001-01-01

    Glass formation in the K2O–TiO2–P2O5–SiO2 system, and the structure and crystallization behavior of glasses having compositions near the stoichiometry of KTiOPO4 (KTP) have been examined by differential thermal analysis (DTA), X-ray diffraction (XRD), fast Fourier transform infrared (FTIR) spectroscopy and second harmonic generation (SHG). Pure glasses may be obtained adding an appropriate amount of P2O5 as well as of SiO2

  8. Double-layer glass-ceramic coatings on Ti6Al4V for dental implants

    Microsoft Academic Search

    E. Verné; C. Fernández Vallés; C. Vitale Brovarone; S. Spriano; C. Moisescu

    2004-01-01

    Double-layer bioactive glass-ceramic coatings were prepared on Ti–6Al–4V substrates by dipping and firing. A SiO2–CaO–Na2O–MgO–P2O5–K2O (SCP) based glass was used as first layer in direct contact with the metallic substrate and a SiO2–Al2O3–P2O5–K2O–CaO–F? (SAF) based glass-ceramic was used as outer bioactive layer. The deposition of the intermediate SCP layer was necessary in order to obtain a good adhesion of the

  9. An in vitro biological and anti-bacterial study on a sol–gel derived silver-incorporated bioglass system

    Microsoft Academic Search

    A. Balamurugan; G. Balossier; D. Laurent-Maquin; S. Pina; A. H. S. Rebelo; J. Faure; J. M. F. Ferreira

    2008-01-01

    ObjectivesThe purpose of this study was to evaluate the in vitro antibacterial and biological activity of silver-incorporated bioactive glass system SiO2–CaO–P2O5–Ag2O (AgBG). The bacteriostatic and bactericidal properties of this new quaternary glass system along with the ternary sol–gel glass system SiO2–CaO–P2O5 (BG) have been studied using Escherichia coli as a test micro-organism. The AGBG system thus appears to be a

  10. Nutrient Management Specialist or Broker Signature The following appendices need to accompany the Nutrient Balance Worksheets if applicable

    E-print Network

    Guiltinan, Mark

    Summary 1 2 CMU/Field ID N P2O5 K2O N P2O5 2 K2O 2 1 2 - 8 Corn Grain after Alfalfa Broiler Litter Spring Incorporation within 2-4 days 3 ton/A 15 30 30 2 -215 -163 See notes 2 2 - 8 Corn Grain after Corn Broiler Soybeans Broiler Litter Spring Incorporation within 2-4 days 3.5 ton/A 0 0 0 4 -216 -155 See notes

  11. Processing, characterisation and biocompatibility of iron-phosphate glass fibres for tissue engineering

    Microsoft Academic Search

    I. Ahmed; C. A. Collins; M. P. Lewis; I. Olsen; J. C. Knowles

    2004-01-01

    Iron-phosphate glass fibres based on the CaO–Na2O–Fe2O3–P2O5 system have been processed and characterised via thermal, XRPD, dissolution rates, diameter and biocompatibility studies. The compositions investigated were fixed at 50mol% P2O5, and the CaO content was varied between 30, 35 and 40mol%. The Fe2O3 was added in low amounts from 1–5mol%, substituting it for the Na2O mol%.The number of Tc (crystallisation

  12. Raman and FTIR spectra of iron phosphate glasses containing cerium

    Microsoft Academic Search

    Y. M. Lai; X. F. Liang; S. Y. Yang; J. X. Wang; L. H. Cao; B. Dai

    2011-01-01

    In the present work, cerium iron phosphate glasses were studied to examine the effect of the CeO2 composition on the structure of the iron phosphate glasses system. Cerium iron phosphate samples with the compositions, I: xCeO2(40?x)Fe2O360P2O5 and II: xCeO2(100?x)(40Fe2O360P2O5) (x=0–30mol%) have been prepared. The structure of glasses has been studied using X-ray diffraction (XRD), Raman spectrum, Fourier transform infrared spectrum

  13. Iron redox equilibrium, structure and properties of zinc iron phosphate glasses

    Microsoft Academic Search

    S. T. Reis; A. Mogusmilankovic; V. Li?ina; J. B. Yang; M. Karabulut; D. E. Day; R. K. Brow

    2007-01-01

    Iron redox equilibrium, structure and properties were investigated for the 10ZnO–30Fe2O3–60P2O5 (mol%) glasses melted at different temperatures. The structure and valence states of the iron ions in these glasses were investigated using Mössbauer spectroscopy, Raman spectroscopy and differential thermal analysis. Mössbauer spectroscopy indicated that the concentration of Fe2+ ions increased in the 10ZnO–30Fe2O3–60P2O5 (mol%) glass with increasing melting temperature. The

  14. Physical properties of lead iron phosphate glasses containing Cr 2O 3

    Microsoft Academic Search

    A. Šanti?; Ž. Skoko; A. Gajovi?; S. T. Reis; D. E. Day; A. Moguš-Milankovi?

    2011-01-01

    The influence of Cr2O3 on glass forming characteristics and physical properties of PbO–Fe2O3–P2O5 glasses has been investigated by Raman and Mössbauer spectroscopies, X-ray diffraction analysis (XRD), Differential Thermal Analysis (DTA), Scanning Electron Microscopy (SEM) and impedance spectroscopy. Glasses of the general composition xCr2O3–(28.3-x)PbO–28.7Fe2O3–43.0P2O5, 0?×?10, (mol%) were prepared by conventional melt-quenching technique. The compositions containing up to 4mol% Cr2O3 formed fully

  15. The role of intracellular high-mobility group box 1 in the early activation of Kupffer cells and the development of Con A-induced acute liver failure.

    PubMed

    Yang, Qiao; Liu, Yanning; Shi, Yu; Zheng, Min; He, Jiliang; Chen, Zhi

    2013-10-01

    Acute liver failure (ALF) is a highly complex syndrome characterized by devastating activation of early activation of Kupffer cells (KCs) has been implicated in the pathogenesis of ALF. However, the factors regulating KC early activation are virtually unexplored. The aim of present study was to determine the role of the intracellular high-mobility group box 1 (HMGB1) in modulating the early activation of KCs during ALF. The intravenous injection of Concanavalin A (Con A) was used to establish a mouse model of ALF. The dynamic pro-inflammatory properties and MHC II expression of KCs were measured by qRT-PCR and flow cytometry. HMGB1 expression in KCs was measured by qRT-PCR and Western blotting. The immunofluorescence was implemented to determine the relocation of HMGB1 in KCs, and the siRNA against HMGB1 was utilized to assess the impact of HMGB1 on KC pro-inflammatory properties. The peak of pro-inflammatory cytokines production and MHC II expression in KCs appeared at the early stage of ALF. The up-regulation of HMGB1 expression and the translocation of HMGB1 in KCs were in parallel with the early activation of KCs. The blockade of intracellular HMGB1 expression caused by siRNA significantly inhibited the production of KC-derived pro-inflammatory cytokines, and led to a down-regulation of MAP kinase activation in KCs. The self-derived HMGB1 is an "early alarmin" of KC activation during Con A-induced ALF. HMGB1 might be a potential target for cell-specific strategy in ALF. PMID:23706499

  16. EXPLORATORY SENSITIVITY ANALYSIS OF CROPSYST, WARM AND WOFOST: A CASESTUDY WITH RICE BIOMASS SIMULATIONS ANALISI ESPLORATIVA DELLA SENSIBILITÀ DI CROPSYST, WARM AND WOFOST: UN CASO DI STUDIO CON SIMULAZIONI DI BIOMASSA DEL RISO

    Microsoft Academic Search

    Roberto Confalonieri; Marco Acutis; Gianni Bellocchi; Iacopo Cerrani; Stefano Tarantola; Marcello Donatelli; Giampiero Genovese

    Knowledge about model uncertainty is essential for crop modelling and provides information crucial for a real understand- ing of models behavior and for parameterization purposes. This work addresses an exploratory sensitivity analysis on the parameters involved with biomass accumulation of three crop models decidedly differing in the way they interpret the con- cept of growth. The models used in the

  17. UNIVERSIT DEGLI STUDI DI SALERNO E 56CUBE: ACCORDO PER SOSTENERE LE STARTUP CON BUSINESS Il Dipartimento di Studi e Ricerche Aziendali -Management & Information Technology e l'incubatore per il Sud Italia,

    E-print Network

    Costagliola, Gennaro

    UNIVERSITÀ DEGLI STUDI DI SALERNO E 56CUBE: ACCORDO PER SOSTENERE LE STARTUP CON BUSINESS incubator di startup innovative nel Sud Italia ­ lanciato dall'incubatore certificato Digital Magics supportare startup digitali, strutturando un programma di Business Management Advisory. Questa partnership

  18. 08853010/$25.00 2009 IEEE 2145IEEE TransacTIons on UlTrasonIcs, FErroElEcTrIcs, and FrEqUEncy conTrol, vol. 56, no. 10, ocTobEr 2009

    E-print Network

    Khuri-Yakub, Butrus T. "Pierre"

    EqUEncy conTrol, vol. 56, no. 10, ocTobEr 2009 Abstract--State-of-the-art 3-D medical ultrasound imaging requires transmitting and receiving ultrasound using a 2-D array of ultrasound transducers with hundreds and transducer array can lead to a portable, high-performance, and inexpensive 3-D ultrasound imaging system

  19. Alla cortese attenzione dello Studente dell'Universit di Economia e Commercio di Genova Con la presente vorremmo sottoporre alla tua attenzione un progetto sulla eco-sostenibilit per il quale la nostra azienda

    E-print Network

    Robbiano, Lorenzo

    Genova Con la presente vorremmo sottoporre alla tua attenzione un progetto sulla eco-sostenibilità per il presente, una breve descrizione della nostra azienda. Techreturns International B.V. e' un'azienda eco significative nel campo dell'eco-sostenibilità presenti sul territorio italiano, appurare se sono impegnate

  20. 08853010/$25.00 2008 IEEE 1IEEE TransacTIons on UlTrasonIcs, FErroElEcTrIcs, and FrEqUEncy conTrol, vol. 55, no. 9, sEpTEmbEr 2008

    E-print Network

    Paris 7 - Denis Diderot, Université

    on the tissue velocity field estimation during con- traction, cine phase contrast mr [7] or ultrasound doppler system. In this paper we report the use of ultrafast ultrasound imag- ing to explore with a submillimeter is a very brief phenomenon (ultrasound scanner prototype able to take up

  1. A.U.L.A.S.: TABLA CORRESPONDENCIA NUEVOS CURSOS *En el caso de haber superado este nivel en cursos anteriores a 2008-2009, consulta con uno de

    E-print Network

    Escolano, Francisco

    A.U.L.A.S.: TABLA CORRESPONDENCIA NUEVOS CURSOS *En el caso de haber superado este nivel en cursos anteriores a 2008-2009, consulta con uno de INGLÉS CURSO realizado hasta 2007-2008 CURSO correspondiente Preparación CAE (C1) ALEMÁN CURSO realizado hasta 2007-2008 CURSO correspondiente a partir de 2008-2009 LENGUA

  2. 08853010/$25.00 2009 IEEE 2679IEEE TransacTIons on UlTrasonIcs, FErroElEcTrIcs, and FrEqUEncy conTrol, vol. 56, no. 12, dEcEmbEr 2009

    E-print Network

    Cao, Wenwu

    EqUEncy conTrol, vol. 56, no. 12, dEcEmbEr 2009 Abstract--Near-field acoustic levitation (NFAL) has been used with experimentally measured levitation force. I. Introduction acoustic levitation is one of the most suitable meth, insulator, or conductor, magnetic or nonmagnetic, can be manipulated by acoustic levitation

  3. Diffusional homogenization of light REE in garnet from the Day Nui Con Voi Massif in N-Vietnam: Implications for SmNd geochronology and timing of metamorphism in

    E-print Network

    Demouchy, Sylvie

    Diffusional homogenization of light REE in garnet from the Day Nui Con Voi Massif in N Department of Earth Sciences, Royal Holloway University of London, Egham, Surrey, TW20 0EX, UK c Department of Earth and Environmental Sciences, The Open University, Walton Hall Milton Keynes MK7 6AA, UK d Institute

  4. Surgical treatment of prolactinomas: cons.

    PubMed

    Bloomgarden, Eve; Molitch, Mark E

    2014-12-01

    Prolactinomas account for approximately 40 % of all pituitary adenomas. Over 95 % of prolactinomas are microadenomas (< 10 mm diameter). Treatment is indicated to correct hypogonadism, restore other hormonal deficits, and alleviate local mass effects. Dopamine agonists (DA) are highly effective in achieving these goals and are well-tolerated. The vast majority of prolactinomas will respond to conventional doses of cabergoline (?2 mg/week) that do not carry an increased risk of cardiac valvular abnormalities. DA therapy may be successful withdrawn in a subset of patients and thus is not necessarily a lifelong commitment. Although transsphenoidal surgery (TSS) is an option for prolactinoma treatment, it is less effective than medical management, carries considerably more risk, and is more expensive. The benefit/risk ratio for DA therapy compared to TSS actually becomes increasingly more favorable as tumor size increases. Therefore DA should remain the clear treatment of choice for essentially all patients with prolactinomas, reserving TSS as a second-line option for the very small number of patients that do not tolerate or are completely resistant to DA therapy. PMID:25112227

  5. Maintaining Consistent, Minimal Con gurations

    E-print Network

    Perry, Dewayne E.

    as customer needs change. From the hardware point of view, the various inter- changeable components must be standardized and plug compatible. From the software point of view, there are two interdependent things needed the products. This means that, among other things, that system storage space is likely to be limited to just

  6. Liquen plano con afectación esofágica

    Microsoft Academic Search

    F. Valdés; A. Caparrini; J. M. Calzada

    2007-01-01

    Lichen planus is an inflammatory disease of unknown etiology which may affect the esophagus. Patients with esophageal lichen planus are usually elderly women. The most frequent symptoms are dysphagia and odynophagia. There is usually concomitant oral involvement in cases of esophageal lichen planus. Endoscopic findings include erosions, exudates and stenosis. Systemic steroids are the most effective therapy for these patients.

  7. ccepting con-structive criticism

    E-print Network

    Alpay, S. Pamir

    passionate about something you're doing? Your great ideas lie there. Important notice: Information in Front meditation." Summer Jobs for Teenagers You andYour GreatIdeas M ay is National Physi- cal Fitness Month in the National Runners' Health Study II and 15,945 walkers in the National Walkers' Health Study, assessing

  8. 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...

  9. 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

  10. 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

    Weaver, Harold A. "Hal"

    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

  11. Guar Variety-Fertility Evaluation Trials & Dryland Guar-Cotton Rotation AG-CARES, Lamesa, TX, 2001-2002

    E-print Network

    Mukhtar, Saqib

    , 2002 Previous Crop: Cotton Seeding Rate: Guar, 80,000 seeds/acre with vacuum planter (~6.5 lbs./A) Plot' Fertilizer: Treatments included 30 lbs. P2O5/A applied as 10-34-0 band (rolling coulters, 5" off top of bed

  12. Guar Varieties and P Fertility at AGCARES, Lamesa, TX, 2001-2003 Calvin Trostle, Texas Cooperative Extension--Lubbock, c-trostle@tamu.edu, (806) 746-6101;

    E-print Network

    Mukhtar, Saqib

    Previous Crop: Cotton Seeding Rate: Guar, 80,000 seeds/acre with vacuum planter (~6.5 lbs./A) Plot Set experimental 2 rows X 12') Fertilizer: Treatments included 30 lbs. P2O5/A applied as 10-34-0 band (rolling

  13. Methoxycarbonyltrifluoromethylthioketene

    Microsoft Academic Search

    A. N. Kovregin; A. Yu. Sizov; A. F. Ermolov

    2003-01-01

    A new method was developed for the synthesis of methoxycarbonyltrifluoromethylthioketene by thermal cleavage of tert-butyl 1,3,3,3-tetrafluoro-2-methoxycarbonylpropenyl sulfide in the presence of P2O5. This thioketene was demonstrated to exhibit high reactivity in reactions with nucleophiles as well as in ene and diene syntheses.

  14. PHOSPHORUS BASICS Larry G. Bundy

    E-print Network

    Balser, Teri C.

    PHOSPHORUS BASICS Larry G. Bundy Dept. of Soil Science University of Wisconsin #12;Phosphorus Terminology · Phosphorus (P) = element name and symbol · P2O5 = phosphate (oxide) Amount of P in fertilizers use #12;Forms & Concentrations of Phosphorus (P) in Soils Form Concentration (ppm) Total 1000 Soil

  15. 40 CFR 60.224 - Test methods and procedures.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... P=Mp Rp where: Mp =total mass flow rate of phosphorus-bearing feed, Mg/hr (ton/hr). Rp =P2 O5...shall be used to determine the mass flow rate (Mp ) of the phosphorus-bearing feed. (ii) The Association of Official...

  16. Ann. For. Sci. 64 (2007) 875881 Available online at: c INRA, EDP Sciences, 2007 www.afs-journal.org

    E-print Network

    Paris-Sud XI, Université de

    2007-01-01

    Cedex, France (Received 14 December 2006; accepted 26 April 2007) Abstract ­ European gorse (Ulex­240 kg P2O5.ha-1 ). Seven to ten years after pine planting, gorse were sampled to evaluate the effect of P fertilization on gorse %Ndfa, determined using the 15 N natural abundance method. One

  17. 21 CFR 74.2053 - D&C Black No. 3.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ...1) Calcium hydroxyapatite (CaO and P2 O5 ), not less than 75 percent and not more than 84 percent; (2) Elemental carbon, not less than 7 percent; (3) Moisture, not more than 7 percent; (4) Silica (SiO2 ), not more...

  18. 21 CFR 74.2053 - D&C Black No. 3.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ...1) Calcium hydroxyapatite (CaO and P2 O5 ), not less than 75 percent and not more than 84 percent; (2) Elemental carbon, not less than 7 percent; (3) Moisture, not more than 7 percent; (4) Silica (SiO2 ), not more...

  19. 21 CFR 74.2053 - D&C Black No. 3.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ...1) Calcium hydroxyapatite (CaO and P2 O5 ), not less than 75 percent and not more than 84 percent; (2) Elemental carbon, not less than 7 percent; (3) Moisture, not more than 7 percent; (4) Silica (SiO2 ), not more...

  20. 40 CFR 60.214 - Test methods and procedures.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...mass flow rate of phosphorus-bearing feed, Mg/hr (ton/hr). Rp =P2 O5 content, decimal fraction. (i) The accountability system of § 60.213(a) shall be used to determine the mass flow rate (Mp ) of the...

  1. 40 CFR 60.214 - Test methods and procedures.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...mass flow rate of phosphorus-bearing feed, Mg/hr (ton/hr). Rp = P2 O5 content, decimal fraction. (i) The accountability system of § 60.213(a) shall be used to determine the mass flow rate (Mp ) of the...

  2. 40 CFR 60.214 - Test methods and procedures.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...mass flow rate of phosphorus-bearing feed, Mg/hr (ton/hr). Rp =P2 O5 content, decimal fraction. (i) The accountability system of § 60.213(a) shall be used to determine the mass flow rate (Mp ) of the...

  3. Testing of Precision Agriculture Technologies in Irrigated Cotton at AG-CARES, Lamesa, Texas, 2000.

    E-print Network

    Mukhtar, Saqib

    2326 Soil sampling: Half-ac grid (Fig.1 and 2) P fertilizer rate: Blanket-rate of 30 lb P2O5/ac of grid-soil sampling or of VRT equipment. The average P fertilizer rate applied in the VRT plots was 38 Specialist, Professor, Research Assistants and Technician. METHODS AND PROCEDURES: Experimental Design

  4. arXiv:1009.4437v1[cond-mat.supr-con]22Sep2010 Pressure effects in PrT2B2C (T = Co, Ni, Pt): Applied and chemical pressure

    E-print Network

    Paris-Sud XI, Université de

    arXiv:1009.4437v1[cond-mat.supr-con]22Sep2010 Pressure effects in PrT2B2C (T = Co, Ni, Pt): Applied: November 1, 2013) High-pressure electrical resistivity ab measurements on intermetallic Pr(Co, Ni, Pt)2B2C Pr(Co, Ni)2B2C compounds exhibit magnetic correlations at about 10 and 4 K, respectively. At low

  5. SISTeMAS De INFoRMACIÓN: INTeRNeT, ACCeSo Y USo PoR TRABAJADoReS De SALUD Y PeRSoNAS VIVIeNDo CoN VIH\\/SIDA

    Microsoft Academic Search

    Patricia J. García; Patricia Caballero Ñ; Víctor Suárez M; Luis Fuentes-Tafur

    2007-01-01

    ReSUMeN El Instituto Nacional de Salud desarrolló NETLAB, un sistema de información basado en la Web que aumenta la disponibilidad de los resultados de laboratorio a los trabajadores de salud y a los pacientes viviendo con VIH\\/SIDA (PVVS). Para asegurar su efectividad se requiere conocer aspectos como recursos y acceso a Internet. Objetivos: Describir las características del acceso a Internet

  6. 9/7/10 3:32 PMShineCon Page 1 of 1file:///Users/Chungsang/g6/Meeting/SHINE10/AbstractPreview.php.html

    E-print Network

    Ng, Chung-Sang

    9/7/10 3:32 PMShineCon Page 1 of 1file:///Users/Chungsang/g6/Meeting/SHINE10/AbstractPreview.php based on the island coalescence instability, using much higher resolutions (up to 8192^2) and larger S (up to 2 x 10^5). Our simulations are based on a fairly standard pseudo spectral code, which has been

  7. 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

  8. Effects of External Magnetic Fields on the Excited States of (ND)8 Metal Complexes.

    NASA Astrophysics Data System (ADS)

    Helms, Charles Alan

    Large changes in the steady state emissions and lifetimes as a function of external magnetic field strength have been observed for (nd)^8 mononuclear and binuclear complexes. These unusually pronounced effects are attributed to a field-induced symmetry reduction leading to a relaxation of transition dipole selection rules. Both spin-orbit coupling and magnetic field strength appear to play a role in determining the magnitude of the observed effect. A theoretical model has been developed to rationalize the results obtained for the Pt_2(H _2P_2O _5)_sp{4}{4-} ion. An analogous model should pertain to the mononuclear systems. Closed-shell (La(III), Lu(III)) rare earth salts of the Pt_2(H_2P _2O_5)_sp{4 }{4-} ion show the same dependence on an externally applied magnetic field as the previously examined K and Ba analogs, in all respects. However, the luminescence properties of the openshell salts are markedly different, even in the absence of a magnetic field. The zero-field phosphorescence lifetime of GdKPt_2 (H_2P_2O _5)_4 is one-tenth that of the closed-shell lifetime, but the position of the phosphorescence is unchanged from the closed-shell case. The application of an external magnetic field produces no further changes in the electronic properties of the open-shell salts. Salts containing rare earth ions with low-lying atomic states (Eu(III)) exhibit complete quenching of the Pt _2(H_2P_2 O_5)_sp{4}{4 -} phosphorescence, indicating efficient energy transfer. Results from complexes containing rare earth ions are analyzed in terms of an angular momentum coupling scheme. A recently published derivation of basis functions for the Pt_2(H_2 P_2O_5)_sp {4}{4-} ion including spin-orbit interactions was repeated and confirmed.

  9. MICROPROP AGAÇÃO DE DUAS ESPÉCIES FRUTÍFERAS, EM MEIO DE CULTURA DSD1, MODIFICADO COM FONTES DE BORO E ZINCO Micropropagation of two fruit tree species on dsd1 culture medium modified with boric acid and zinc sulfate

    Microsoft Academic Search

    Fabíola Villa; Moacir Pasqual; Franscinely Aparecida de Assis; Gleice Aparecida de Assis; Danielle Zampiere; Arce Zárraga

    -1 ) e sulfato de zinco hidratado (0; 1,0; 2,0 e 4,0 mg L -1 ), em todas as combinações possíveis. Segmentos nodais de plantas preestabelecidas in vitro foram excisados e inoculados em tubo de ensaio, contendo 15 mL do meio de cultura. Posteriormente, os tubos de ensaio foram transferidos para sala de crescimento a 27 ± 1 º C,

  10. Use of a modified AFLP protocol to discriminate Salmonella enterica subsp. enterica serovar Enteritidis isolates Utilização de um protocolo modificado de AFLP para discriminar isolados de Salmonella enterica subsp. enterica sorovar Enteritidis

    Microsoft Academic Search

    Clarissa Silveira; Luiz Vaz; André Felipe Streck; Tatiana Tramontina; Marisa Ribeiro de Itapema; Cláudio Wageck Canal

    Salmonella enterica subsp. enterica (S.) serovar Enteritidis is one of the main pathogens involved in food-borne diseases worldwide. In epidemiological investigations of food-related salmonellosis, subtyping is necessary to improve preven- tive and control measures. Single-enzyme amplified fragment length polymorphism (SE-AFLP) analysis is a modified AFLP that uses only one restriction enzyme to produce DNA fragments that are selectively amplified by

  11. 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.

  12. Investigation of Electrical Conduction in Vanadate Based Glasses

    NASA Astrophysics Data System (ADS)

    Barde, R. V.; Waghuley, S. A.

    The binary glassy systems 60V2O5-(40-x)P2O5 -xB2O3 were prepared by melt quenching technique. The mole of B2O3 was varies from 5 to 20 mol % with constant mol % of V2O5 during preparation of glass samples. The dc electrical conductivity of samples was measured in temperature range 303-473 K and found to be higher for sample 60 V2O5-20P2O5 -20B2O3. Using the Arrhenius equation of conductivity, the activation energy of conduction is estimated. The conduction in these glasses is takes place by phonon-assisted hopping between the localized states.

  13. Electrical behaviour of Li 2O–ZnO–SiO 2 glass and glass-ceramics system

    Microsoft Academic Search

    M. Goswami; S. K. Deshpande; R. Kumar; G. P. Kothiyal

    2010-01-01

    Sealing quality lithium zinc silicate (LZS) glasses of compositions (wt.%) (a) LZSL– Li2O: 12.65, ZnO: 1.85, SiO2: 74.4, Al2O3: 3.8, K2O: 2.95, P2O5: 3.15, B2O3: 1.2 (low ZnO), and (b) LZSH– Li2O: 8.9, ZnO: 24.03, SiO2: 53.7, Na2O: 5.42, P2O5: 2.95, B2O3: 5 (high ZnO) were prepared by conventional melt-quench technique and converted to glass-ceramics by controlled crystallization process. The

  14. New phospho-tellurite glasses with optimization of transition temperature and refractive index for hybrid microstructured optical fibers

    NASA Astrophysics Data System (ADS)

    Duan, Zhongchao; Tong, Hoang Tuan; Liao, Meisong; Cheng, Tonglei; Erwan, Motillon; Suzuki, Takenobu; Ohishi, Yasutake

    2013-10-01

    The glass formation and compositional dependences of glass thermal properties and optical properties were investigated in TeO2-ZnO-Na2O-P2O5 system. The refractive index at 1.55 ?m and glass transition temperature varied in a wide range from 1.513 to 2.036 and from 265 °C to 376 °C by controlling of the TeO2/P2O5 and ZnO/Na2O content, respectively. These properties enable phospho-tellurite glasses with large freedom in designing and fabrication of hybrid microstructured optical fiber. The structures of glasses were investigated by Raman spectra to understand their dependence of structure on composition. Using the present glasses, some hybrid microstructured optical fibers with various dispersion profiles were designed.

  15. Dependence of the critical cooling rate for lithium-silicate glass on nucleating agents

    NASA Technical Reports Server (NTRS)

    Huang, W.; Ray, C. S.; Day, D. E.

    1986-01-01

    The critical cooling rate, Rc, for glass formation of a glass containing 40 mol pct Li2O and 60 mol pct SiO2, doped with small amounts of Pt, Au, P2O5, and TiO2 nucleating agents, has been measured. Rc increases with increasing Pt and Au additions, but Pt has a larger effect than Au. Additions of P2O5 tend to decrease Rc, whereas TiO2 has practically no effect on Rc. The devitrified glass nucleated with Pt contains only crystalline Li2O-SiO2, but all the other devitrified glasses, including the undoped glass, contain both Li2O-SiO2 and Li2O-2SiO2. Analysis shows that Rc increases as the concentration of the Li2O-SiO2 phase in the devitrified glass increases.

  16. Phosphorene oxides: Bandgap engineering of phosphorene by oxidation

    NASA Astrophysics Data System (ADS)

    Ziletti, A.; Carvalho, A.; Trevisanutto, P. E.; Campbell, D. K.; Coker, D. F.; Castro Neto, A. H.

    2015-02-01

    We show that oxidation of phosphorene can lead to the formation of a new family of planar (two-dimensional) and tubular (one-dimensional) oxides and suboxides, most of them insulating. This confers to black phosphorus a native oxide that can be used as barrier material and protective layer. Furthermore, the bandgap of phosphorene oxides depends on the oxygen concentration, suggesting that controlled oxidation can be used as a means to engineer the bandgap. For the oxygen saturated composition, P2O5 , both the planar and tubular phases have a large bandgap energy of about 8.5 eV and are transparent in the near UV. These two forms of phosphorene oxides are predicted to have the same formation enthalpy as O'-P2O5 , the most stable of the previously known forms of phosphorus pentoxide.

  17. Thermal properties and stability of lithium titanophosphate glasses

    Microsoft Academic Search

    P. Mošner; K. Vosejpková; L. Koudelka

    2009-01-01

    DTA was used to study thermal properties and thermal stability of (50-x)Li2O-xTiO2-50P2O5 (x=0–10 mol%) and 45Li2Ot-yTiO2-(55-y)P2O5 (y=5–20 mol%) glasses. The addition of TiO2 to lithium phosphate glasses results in a non-linear increase of glass transition temperature. All prepared glasses crystallize\\u000a under heating within the temperature range of 400–540°C. The lowest tendency towards crystallization have the glasses with\\u000a x=7.5 and y=10

  18. UTILIZACIÓN DE RESIDUOS DE PLÁTANO PARA LA PRODUCCIÓN DE METABOLITOS SECUNDARIOS POR FERMENTACIÓN EN ESTADO SÓLIDO CON EL HONGO Lentinus crinitus UTILIZATION OF PLANTAIN WASTE FOR THE PRODUCTION OF SECONDARY ME TABOLITES BY SOLID SUBSTRATE FERMENTATION USING THE FUNGI Lentinus crinitus

    Microsoft Academic Search

    GRANDA R. Diana; JIMÉNEZ T. Gloria; REVISTA DE LA FACULTAD DE QUÍMICA

    2005-01-01

    This paper presents the production of secondary metabolites with pharmaceutical and alimentary interest from plantain waste used as substrate in a solid state fermentation process with the white root fungi Lentinus crinitus . The production of metabolites is studied during the growth of the microorganism for a period of 21 days, in a system con-

  19. Empiece con el desayuno Coma buenos bocadillos

    E-print Network

    , color, sexo, religión, origen nacional, edad, discapacidad, información genética, o condición de las personas, sin distinción de raza, color, sexo, religión, origen nacional, edad, discapacidad, color, sexo, religión, origen nacional, edad, discapacidad, información genética, o condición de

  20. Mercadeo con causasocial: ¿Responsabilidad social o estrategiacomercial?

    Microsoft Academic Search

    Juan Vianey Gómez Jiménez

    2004-01-01

    La necesidad de ser competitivos ha llevado a la gerencia de las empresas a buscar diferentes formas o alternativas de alcanzar la diferenciación de sus productos y servicios. Atendiendo a las actuales tendencias, las decisiones de diferenciación han estado basadas en lo que los clientes y ciudadanos consideran importante. Estos, frente a los continuos cambios económicos y sociales al igual

  1. 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.…

  2. ORNL/CON-224 Energy Division

    E-print Network

    Oak Ridge National Laboratory

    ..................................... 148 7.1 Stirling Engine-Driven Systems ................................. ..... 148 7.2 Internal Combustion Engine-Driven Systems ......................... 170 7.3 Rankine, Brayton, and Other Engine

  3. Planetas extrasolares con pequeño semieje orbital

    Microsoft Academic Search

    D. Giuliodori; S. Fernández

    2002-01-01

    The discovery of extra-solar planets, first surrounding a pulsar (PSR1257+12, Malhotra et al 1992) and then main-sequence stars similar to our sun, (http:\\/\\/exoplanets.org) has opened a new field of study inside the dynamic of planetary systems. Although the information we have of these objects is determined by the own limitations of the detection methods that are used, important differences between

  4. Con la apertura UniversidaddeAlicante

    E-print Network

    Escolano, Francisco

    ciclo de Relaciones Laborales". 2º Por diversos avatares técnicos, administrativos y políticos, se ha ocasiones, han frenado el proceso de reforma de sus actuales planes de estudios o su reorganización académi

  5. Cálculos ab initio con correlación electrónica

    Microsoft Academic Search

    M. Merchán Bonete

    2003-01-01

    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

  6. 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...

  7. MSP | LABORSALUS TRABAJO CON PANTALLAS DE VISUALIZACIN

    E-print Network

    Cardeñosa, Jesús

    . Fatiga mental. Síntomas: Estrés y cansancio o Trastornos neurovegetativos (somatizaciones, palpitaciones, etc.) o Perturbaciones tales como ansiedad, irritabilidad. o Trastornos del sueño (insomnio, irritación, pesadez de párpados, etc. o Trastornos visuales (borrosidad) o Síntomas extraoculares (cefaleas

  8. 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

  9. Asistencia de pacientes con fibrosis quística

    Microsoft Academic Search

    Birgitta Strandvik

    2006-01-01

    ExtractoLa fibrosis quística (FQ), la enfermedad pediátrica hereditaria autosómica más corriente, ha dejado de estar limitada a la infancia desde que la terapia moderna ha proporcionado a los pacientes una mayor longevidad y una mejor calidad de vida. Cuando se identificó el gen, hace más de 16 años, y se descubrió la mutación más corriente, ?F508, se suscitó la esperanza

  10. Una “discussione in rete” con Stanley Wilder

    Microsoft Academic Search

    Basile Carla

    2005-01-01

    On 4th January 2005 the USA Information Literacy community is shocked by the Stanley Wilder's article “Information Literacy Makes all the Wrong Assumptions” published on The Chronicle of Higher Education. The article strongly criticises against Information Literacy and academic libraries. As a reaction, an intense debate immediately arises within the USA Information Literacy community through the ILI-L discussion list. The

  11. 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.

  12. DIVERSAS MANERAS DE GENERAR ENERGIA CON

    E-print Network

    Gilbes, Fernando

    desperdicios y no produce dioxido de carbono (CO2) que altere los gases de invernadero. Produce cerca de 715-usualmente se refiere a plantas instaladas en embalses o rios. 3. SIN REPRESAS-captura la energia cinetica (de movimiento) en rios y oceanos. 4. DE MAREA-captura la energia de mareas en direccion horizontal o vertical. 5

  13. DIVERSAS MANERAS DE GENERAR ENERGIA CON

    E-print Network

    Gilbes, Fernando

    . No genera desperdicios y no produce dioxido de carbono (CO2) que altere los gases de invernadero. Produce-usualmente se refiere a plantas instaladas en embalses o rios. SIN REPRESAS-captura la energia cinetica (de movimiento) en rios y oceanos. DE MAREA-captura la energia de mareas en direccion horizontal o vertical. DE

  14. Facundina: Teatro con todas las letras

    E-print Network

    Espinosa Domí nguez, Carlos

    1987-10-01

    concretos. El proceso creador, que FA1MQK7 101 presumo fue fascinante y rico, culminó en un espectáculo que estrena ron en 1983: Facundina. Al esfuerzo de Graciela y Eduardo se sumó el de Beatiz Seibel, en la asesoría dramatúrgica. Relaciones de amistad...

  15. Nanoparticles: Health Effects—Pros and Cons

    PubMed Central

    Gwinn, Maureen R.; Vallyathan, Val

    2006-01-01

    With the advent of nanotechnology, the prospects for using engineered nanomaterials with diameters of < 100 nm in industrial applications, medical imaging, disease diagnoses, drug delivery, cancer treatment, gene therapy, and other areas have progressed rapidly. The potential for nanoparticles (NPs) in these areas is infinite, with novel new applications constantly being explored. The possible toxic health effects of these NPs associated with human exposure are unknown. Many fine particles generally considered “nuisance dusts” are likely to acquire unique surface properties when engineered to nanosize and may exhibit toxic biological effects. Consequently, the nuisance dust may be transported to distant sites and could induce adverse health effects. In addition the beneficial uses of NPs in drug delivery, cancer treatment, and gene therapy may cause unintentional human exposure. Because of our lack of knowledge about the health effects associated with NP exposure, we have an ethical duty to take precautionary measures regarding their use. In this review we highlight the possible toxic human health effects that can result from exposure to ultrafine particles (UFPs) generated by anthropogenic activities and their cardiopulmonary outcomes. The comparability of engineered NPs to UFPs suggests that the human health effects are likely to be similar. Therefore, it is prudent to elucidate their toxicologic effect to minimize occupational and environmental exposure. Highlighting the human health outcomes caused by UFPs is not intended to give a lesser importance to either the unprecedented technologic and industrial rewards of the nanotechnology or their beneficial human uses. PMID:17185269

  16. Incentives for organ donation: pros and cons.

    PubMed

    Chkhotua, A

    2012-01-01

    Altruism still remains the main principle of organ donation worldwide. However, since the current practices has not met the demand for organs, new strategies should be found to encourage organ donation. Implementation of financial incentives in transplantation is a matter of debate among experts in the fields of transplantation, ethics, law, and economics. It should be acknowledged that donors incur many expenses while participating in the transplant process, which seems unfair. Various forms of incentives have been suggested and are currently used worldwide. This article describes current attitudes toward incentives for in transplantation used in different countries, arguing in favor as well as against them. PMID:22841275

  17. TODAS LAS CEFALEAS CON CHIARI DEBEN OPERARSE?

    Microsoft Academic Search

    FEDERICO BUONANOTTE

    Summary Must all headaches in patients with Chiari malformation be surgically treated ? The Chiari Mal formation is a frequent cause of headache related to effort. The mechanic obstruction of circula- tion of the CRL is the cause of the syrinx and the symptoms. The spontaneous resolution of the syrinx is uncomon even and has been reported a very few

  18. Autoconcepto de mujeres con cáncer en mama

    Microsoft Academic Search

    Bañuelos-Barrera Patricia; Bañuelos-Barrera Yolanda; Esquivel-Rodríguez Martha; Moreno-Ávila Vanessa

    2007-01-01

    Abstract Abstract Abstract Abstract Introduction: Breast cancer is characterized for uncontrolled growing of cells; it is able to cause metastasis; it constitutes one of the first causes of mortality in the world for women. This disease affects the body image and self-concept which is defined by Roy as the notion of the individual by himself with emphasis on internal and

  19. 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

  20. Payment for donor kidneys: Pros and cons

    Microsoft Academic Search

    E A Friedman; A L Friedman

    2006-01-01

    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