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Formation of ?-caprolactam via catalytic Beckmann rearrangement using P 2O 5 in ionic liquids  

Microsoft Academic Search

Catalytic Beckmann rearrangement of cyclohexanone oxime in ionic liquids using P2O5 or Eaton's reagent has been investigated. 1-n-Butyl-3-methylimidazolium hexafluorophosphate (bmiPF6) gives superior results to those noted by earlier workers.

Rex X Ren; Larisa D Zueva; Wei Ou



Effects of substituting B2O3 for P2O5 on the structures and properties of V2O5-P2O5 glass systems  

NASA Astrophysics Data System (ADS)

V2O5-B2O3-P2O5 glasses with various compositions were prepared using a normal melt quenching technique, and their characteristics and structural properties were investigated using different techniques. Replacement of P2O5 by B2O3 was found to improve the thermal properties, chemical durability, and room-temperature conductivity. The observed variations in the properties may be correlated with changes in the internal glass network as a result of changes in the chemical composition. Vanadium ions are believed to be present in three possible valence states, namely V3+, V4+, and V5+, and the ratios of these states depend on the glass composition. The observed increases in chemical durability and room-temperature conductivity are assumed to be related to increases in the mean crosslinking density, increases in the number of bridging oxygens, and electron hopping between vanadate ions in different valence states.

Han, Kyungseok; Hwang, Chawon; Kim, Donghwan; Gwoo, Donggun; Kim, Taehee; Choi, Wongyu; Kee, Kyungbum; Kim, Jonghwan; Ryu, Bongki



The significance of Cl/P2O5 ratios from lunar samples  

NASA Astrophysics Data System (ADS)

The Cl(r)/P2O5 ratios of lunar samples are reported to occur in three groups (Jovanovic and Reed, 1975; etc.). These data have been modeled as representative of three discrete volumes of differentiating magma and correlated with large convection cells and moon-wide heterogeneities. The assumptions inherent to their model are not valid. That the Cl(r)/P2O5 ratio of apatite or a rock is indicative of a magma system is unrealistic. A range of ratios can be generated during the fractionation of a magma. Apatite is not the major Cl- and P-bearing phase in most of the samples analyzed; rust, FeO(OH, Cl) and schreibersite, (FeNi)3P, occur in over 2/3 rds of the Apollo 16 rocks where they constitute 0.1-0.6 modal %, enough to account for most of the Cl(r) and P2O5 analyzed. Due to the complexities and presence of these minerals in soils and breccias, Cl(r)/P2O5 ratios have no real significance in non-igneous samples. However, basaltic rocks alone do not define any statistically significant Cl(r)P2O5 groupings.

Taylor, L. A.; Hunter, R. H.


Low Temperature Sintering of P2O5Added Cordierite Glass with Borosilicate Glass  

Microsoft Academic Search

Borosilicate glass was adopted as a sintering aid to improve the sinterability of P2O5-added cordierite glass. The flux effect of borosilicate glass aids the coalescence of cordierite glass particles, which promotes the densification. Crystallization of cordierite glass is the major reaction during the sintering of cordierite glass with borosilicate glass. Besides the advantage of lower sintering temperature, the addition of

Shen-Li Fu; Lih-Shan Chen



Low Temperature Sintering of P2O5Added Cordierite Glass with Lead Borosilicate Glass  

Microsoft Academic Search

Cordierite was prepared by the sintering of cordierite glass and lead borosilicate glass. With the addition of lead borosilicate glass, P2O5-added cordierite glass can be densified at lower sintering temperature. Owing to the flux effect of lead borosilicate glass, the coalescence of glass particles was aided by the viscous flow of the glass. Besides the advantage of lower temperature sintering,

Lih-Shan Chen; Shen-Li Fu



Physical Properties of Calcium Phosphates Glasses with Various Cao\\/P2O5 Mole Ratios  

Microsoft Academic Search

The physical properties of calcium phosphate glasses with various CaO\\/P2O5 mole ratios, Vicker's surface hardness, weight loss percentage after dipping Ringer's solution were investigated in this study. The best surface hardness of crystallized glass has an average hardness of 670Kg\\/mm and the minmum weight loss percentage of crystallized glass were lower than 1%. The major crystalline phase that developed after

Chung-King Hsu; Jinn-Shing Lee; Jie-Ming Sheu; Chin-Wang Huang



First-principles thermodynamics of La2O3-P2O5 pseudobinary system  

NASA Astrophysics Data System (ADS)

Phase stabilities in the La2O3-P2O5 pseudobinary system have been theoretically analyzed. Phonon modes of five crystals, i.e., La2O3, La3PO7, LaPO4, LaP3O9, and LaP5O14, and vibrational modes of gaseous P2O5(g) are computed from first principles in order to obtain the contribution of vibrations to the free energy. Additional dynamical contributions, i.e., rotations and translations are also taken into account for the gaseous P2O5(g). Vibrational states strongly reflect the crystal structures and bonding states. In this system, the strong P-O covalent bonds in PO4 units and the relatively weak La-O bonds are found to be the key factors determining the vibrational spectra. In the oxyphosphate, La3PO7, the two bonding states are coexisting, and the vibrational spectrum is approximately an average of La2O3 and LaPO4. On the other hand, the P2O5-rich compounds, i.e., LaP3O9 and LaP5O14, cannot be treated in the same manner. Their PO4 units form corner-sharing networks whose vibrations are strongly correlated. The networks raise the vibrational frequencies, leading to high-frequency modes up to 40 THz. The Gibbs energies using the calculated vibrational spectra are in reasonable agreement with the available data of La2O3, LaPO4, and P2O5(g), e.g., the differences between the calculated and reported values are less than 2 kJ/mol-atom (20 meV/atom) at 1500 K. The Gibbs energies and the phase stabilities of the other three compounds, La3PO7, LaP3O9, and LaP5O14, are evaluated, whose data are yet unknown so far.

Toyoura, Kazuaki; Hatada, Naoyuki; Nose, Yoshitaro; Uda, Tetsuya; Tanaka, Isao



Phase Equilibria in The System La2O3–K2O–P2O5  

Microsoft Academic Search

The ternary system La2O3–K2O–P2O5 has been examined by thermal, X-ray, IR and microscopic methods. The existence of three double potassium-lanthanum phosphates,\\u000a K3La(PO4)2, KLa(PO3)4 and K2La(PO3)5 has been confirmed, and the phase diagram of the ternary system La2O3–K2O–P2O5 over the composition range LaPO4–K3PO4–P2O5 has been determined.

W. Jungowska



Compressibility of P2O5-Al2O3-Na2SiO3 melts  

NASA Astrophysics Data System (ADS)

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.

Webb, Sharon; Courtial, Philippe



Lead-free low-melting point sealing glass in SnO–CaO–P 2O 5 system  

Microsoft Academic Search

Development of lead-free low-melting point sealing glass with properties such as low coefficient of thermal expansion (CTE), low glass transition temperature (Tg), low softening temperature (Tf), low cost, high electrical resistance and high chemical stability, has been under strong market demands. Research on the development of lead-free low-melting point sealing glass in SnO–CaO–P2O5 (SCP) system was carried out. A large

Jianhe Hong; Desen Zhao; Jinfei Gao; Mingzhong He; Haifeng Li; Gang He



Judd–Ofelt analysis and improvement of thermal and optical properties of tellurite glasses by adding P 2O 5  

Microsoft Academic Search

Er3+ and Er3+\\/Yb3+ co-doped tellurite glasses, suitable for developing optical fiber laser and amplifier, have been elaborated from the conventional melt-quenching method. Results of differential scanning calorimetry (DSC) measurements indicate a good thermal stability of tellurite glasses. The DSC measurements show an improvement of thermal stability of glass hosts after adding P2O5. Absorption spectrum from near infrared to visible was

I. Jlassi; H. Elhouichet; M. Ferid; C. Barthou



Crystallization kinetics and phase transformation in superionic lithium metaphosphate (Li(2)O-P(2)O(5)) glass system.  


The ionic conductivity of mol% 50Li(2)O-50P(2)O(5) melt quenched glass shows an anomalous increase after its glass transition temperature (T(g)) around 590 K. On further increasing the temperature gradually, the conductivity decreases owing to the devitrification of Li(2)O-P(2)O(5) glass. The evolution of devitrified crystallites was evidenced by XRD patterns. To understand the devitrification process, isothermal and non-isothermal DSC studies have been carried out on mol% 50Li(2)O-50P(2)O(5) glass. T(g) as well as T(c) values are found to increase monotonically with increasing heating rates. Variation of T(g) as a function of heating rates has been investigated to evaluate the lower limiting temperature of T(g) and the activation energy for structural relaxation. Results of the DSC studies indicate (i) single-stage bulk crystallization of the glass, with DSC traces exhibiting a single [Formula: see text] transition, (ii) an order parameter (Avrami constant) of 2.8 ± 0.1, suggesting internal (bulk) crystallization of the glass, (iii) an activation energy for crystallization equal to 121.7 kJ mol(-1) and (iv) the activation energy for structural relaxation, E(g), to be 558.8 kJ mol(-1). The crystallization mechanism is closely associated with the JMA model and the experimental dataset have been fitted to a non-isothermal Avrami expression and the obtained parameters confirm the experimental results. PMID:21693908

Money, Benson K; Hariharan, K



Highly bioactive P 2O 5–Na 2O–CaO–SiO 2 glass-ceramics  

Microsoft Academic Search

Glasses having a chemical composition between 1Na2O–2CaO–3SiO2 (1N2C3S) and 1.5Na2O–1.5CaO–3SiO2, containing 0, 2, 4 and 6 wt% P2O5, were crystallized to several volume percent through thermal treatments in the range 550–700 °C. These glasses and glass-ceramics were exposed to a simulated body fluid solution (SBF-K9 which is close to human plasma) for several time periods. Fourier transform infrared spectroscopy (FTIR)

Oscar Peitl; Edgar Dutra Zanotto; Larry L. Hench



Radiation effects on some physical and thermal properties of V2O5- P2O5 glasses  

NASA Astrophysics Data System (ADS)

Some physical properties of the binary V2O5-P2O5 glass system over the composition range 50-85 mol% V2O5 were investigated before and after gamma-rays irradiation. Increasing P2O5 causes remarkable changes in the properties studied as visualized by the increase in both the softening points and the Vickers microhardness values. The observed variations in the properties may be correlated with the changes in internal glass network with change in the chemical composition. Vanadium ions are believed to be present in three possible valence states V3+, V4+ and V5+, and the ratios of these states depend on glass composition. Observed decreases in electrical conductivity are assumed to be related to decreases in the mean crosslink densities, increase of the number of nonbridging oxygens, and/or electron hopping between vanadate ions in different valence states. The changes obtained due to gamma-irradiation are correlated to several factors such as polarization and field strengths of the respective cations and to the amount of induced defect centers created upon gamma-irradiation.

Ezz-Eldin, F. M.



Thermal Behavior and Structural Analysis of Li2O-TiO2-P2O5 (LTP) System  

NASA Astrophysics Data System (ADS)

This study focuses on the preparation of Li2O-TiO2-P2O5 (LTP) by mechanical milling (MM) method at 600 rpm. The samples were milled for 40 hours using 5 mm size ball-mill. The samples underwent different heat treatment and its conductivity behavior was investigated. Thermal and structural analysis of the highest conducting LTP system was investigated by means of TGA-DSC, XRD, and laser particle sizer respectively. An increase in the crystallinity of the samples was observed with increase in sintering temperature. The particle sizes of the samples were also observed to increase with increase in crystallinity. The samples that underwent heat treatment exhibit higher conductivity values with a value of 5.59×10-4 Scm-1 at 800 °C.

Faizal, A. F. A.; Subban, R. H. Y.



Trends in the cation distribution in the structures of the compounds forming in the Ln 2 O 3 GeO 2 -P 2 O 5 systems  

Microsoft Academic Search

The cationic networks in the structures of the initial oxides and all binary and ternary compounds forming in the Ln2O3-GeO2-P2O5 systems have been studied. In the phase diagrams of the Nd2O3-GeO2-P2O5 and Er2O3-GeO2-P2O5 systems, the regions of the structural influence of individual compounds with topologically identical cationic networks—anisotropic\\u000a (A), combined (C), and isotropic (I)—are united into common areas. The A:

G. A. Bandurkin; V. A. Krut’ko; G. V. Lysanova; M. G. Komova



Glass forming region and physical properties in the system P 2O 5Na 2O–Fe 2O 3  

Microsoft Academic Search

The glass forming region of the system P2O5–Na2O–Fe2O3 was determined, using phosphate salts as precursor materials. The glasses were produced in non-wetting gold\\/platinum crucibles in order to avoid contamination. Glass formation was confirmed using XRD and the final composition determined using EDX. The glass forming region was found to be relatively short at 50% P2O5 content in comparison to both

A. J. Parsons; C. D. Rudd



Structural and thermal properties of La2O3Fe2O3P2O5 glasses  

NASA Astrophysics Data System (ADS)

The structural properties of xLa2O3(40 - x)Fe2O360P2O5(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.

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



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

NASA Astrophysics Data System (ADS)

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

Choi, Hyoung-Seuk; Choi, Duck-Kyun



Structural and physical properties in the system ZnO-B2O3-P2O5-RnOm  

NASA Astrophysics Data System (ADS)

The glass forming region in the quaternary system ZnO-B2O3-P2O5-RnOm has been determined. Glass transition temperature (Tg), glass density (?), thermal expansion coefficient (?) and weight loss percentage (WL) of these glasses were measured. The structure of (90-x-y)ZnO-xB2O3-yP2O5-10RnOm glass was characterized by infrared spectra (IR), Raman spectra and X-ray diffraction (XRD). Results of IR and Raman indicated that B2O3 participated in the glass network as a glass modifier and the IR band around 1440 cm-1 was ascribed to the vas(B-O-B) vibrations. Glass intensity increased with increase in B2O3 content. The disappearance of vs(P-O-P) vibration around 760 cm-1 indicated that P-O-B linkage was formed. XRD results revealed that the major crystalline phase changes with substitution of different amounts of B2O3: Zn2P2O7 for 45ZnO-xB2O3-35P2O5-10RnOm glass, where x=0-20, and BPO4 for 45ZnO-xB2O3-35P2O5-10RnOm glass, where x=30-40.

Li, Shengchun; Chen, Pei; Li, Yaogang



Heat capacity and glass transition in P2O5-H2O solutions: support for Mishima's conjecture on solvent water at low temperature.  


The P(2)O(5)-water system has the widest range of continuously glass-forming compositions known for any glassformer + water binary system. Despite the great range of structures explored by the glasses and liquids in this system, the glass transition temperature (T(g)) itself varies in a simple monotonic fashion. However the values of T(g) reported in the literature show wide disagreement, linked to the different methods of measurement employed. In this work we use differential scanning calorimetry (DSC) to obtain both T(g) itself and the jump in heat capacity that occurs as the metastable equilibrium of the supercooled liquid relieves the non-ergodic glassy state. Our study covers the molar ratio range of H(2)O/P(2)O(5) from 1.5 to 14 (corresponding to the mass fraction of P(2)O(5) between 0.36 and 0.84), which includes the compositions corresponding to pyrophosphoric acid (H(4)P(2)O(7)) and orthophosphoric acid (H(3)PO(4)). The theoretical model of Couchman and Karasz predicts very well the glass transition temperatures of the P(2)O(5)-H(2)O system over the whole composition range if the relatively large heat capacity change associated with water in aqueous solutions at the glass transition temperature is adopted, instead of the vanishingly small value observed for vapor deposited or hyperquenched pure water. Therefore, solvent water in this ambient pressure P(2)O(5)-H(2)O system behaves like a different liquid, more closely resembling a high-density liquid (HDL) polyamorph, as suggested by Mishima for electrolytes at high pressures. PMID:21922106

Corti, Horacio R; Nores-Pondal, Federico J; Angell, C Austen



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


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

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



Flow cytometry analysis of effects of glass on response of osteosarcoma cells to plasma-sprayed hydroxyapatite\\/CaO-P2O5 coatings  

Microsoft Academic Search

Multilayered coatings composed of mixtures of hydroxyapatite (HA) and P2O5-based bioactive glasses offer potential clinical benefits in orthopedic and dental surgery. In this study double-layer plasma-sprayed coatings were prepared and the biological response evaluated in tissue cul- ture using two human osteosarcoma cell lines, MG63 and HOS TE85 (HOS). The cells were cultured on the materials and the effects on

M. P. Ferraz; J. C. Knowles; I. Olsen; F. J. Monteiro; J. D. Santos



Development and in vitro characterization of sol–gel derived CaO–P 2O 5–SiO 2–ZnO bioglass  

Microsoft Academic Search

A CaO–P2O5–SiO2–ZnO bioglass was formed by the sol–gel technique and characterized by Raman spectroscopy, X-ray diffraction, energy dispersive X-ray analysis (EDXA) and scanning electron microscopy (SEM). The surface reactivity of the resultant glass-ceramic specimens was analyzed by immersion studies in simulated body fluid (SBF). SEM–EDXS and inductively coupled plasma atomic emission spectrometry techniques were used to monitor changes in the

Anbalagan Balamurugan; Gerard Balossier; Sanjeevi Kannan; Jean Michel; Avito H. S. Rebelo; Jose M. F. Ferreira



Tribological properties of MgO–CaO–SiO 2–P 2O 5–F-based glass-ceramic for dental applications  

Microsoft Academic Search

Microhardness and tribological behavior of a glass-ceramic produced from a glass in the MgO–CaO–SiO2–P2O5–F system have been investigated with regard to the phases formed and microstructure developed during crystallization. The results of X-ray diffraction analysis indicated that apatite and wollastonite are the predominant crystalline phases. Scanning electron microscopy examination revealed that the wollastonite crystal content decreases and apatite crystal content

Abdullah Ozturk



Phosphate glasses for tissue engineering: Part 1. Processing and characterisation of a ternary-based P 2O 5–CaO–Na 2O glass system  

Microsoft Academic Search

This paper presents the results of a study of the thermal properties, X-ray powder diffraction (XRPD), NMR and solubility of a range of phosphate-based glasses. Ion release and pH measurements were also obtained. The compositions were limited by fixing the P2O5 mol% content at 45, 50 and 55mol%, and varying the CaO mol% at 30, 35 and 40mol%. Initial data

I. Ahmed; M. Lewis; I. Olsen; J. C. Knowles



Variations of the anions polymerization degree of CaO-SiO 2-P 2O 5-H 2O CBC materials during hydration  

Microsoft Academic Search

Changes in the polymeric distribution of anions during the hydration process of the CBC developed from CaO-SiO2-P2O5-H2O system were studied by IR and NMR (29Si, 31P) measurements. It was revealed that the absorption band of -OH in OHAp moved close to that of the standard OHAp mineral; for the sample hydrated at 365 days, there was 77.28% of the silicate

Xiuping Feng; Nanru Yang



Compositional effect of WO3, MoO3, and P2O5 on Raman spectroscopy of tellurite glass for broadband and high gain Raman amplifier  

NASA Astrophysics Data System (ADS)

In order to obtain broadband and high Raman gain coefficient in the tellurite glass, a detailed study of the effects of WO3, MoO3, and P2O5 in TeO2-ZnO-Na2O-Nb2O5 (TZNN) glass system on the thermal stabilities and Raman spectroscopic was performed. It was found that both WO3 and MoO3 improved the glass thermal stability and enhanced the bandwidth significantly. Higher Raman gain coefficients and broader bandwidth were realized in the MoO3 modified glasses than those of WO3 added glass. The tellurite glass containing 15 mol. % MoO3 exhibits the bandwidth 1.7 times larger than the silica glass and the Raman gain coefficient is as high as 38 times that of the silica glass. Moreover, with the addition of P2O5 in TeO2-ZnO-Na2O-Nb2O5-WO3 (TZNNW) and TeO2-ZnO-Na2O-Nb2O5-MoO3 (TZNNM) glass systems, the thermal stabilities can further be improved. On the other hand, the Raman bandwidth can further be broadened, especially in the TZNNMP glass system. The tellurite glass containing 15 mol. % MoO3 and 15 mol. % P2O5 shows the bandwidth 1.9 times larger than the silica glass and maintains high Raman gain coefficient which is as high as 37 times that of the silica glass, indicating this glass is a promising candidate as new gain media for broadband Raman fiber amplifier.

Yuan, J.; Yang, Q.; Chen, D. D.; Qian, Q.; Shen, S. X.; Zhang, Q. Y.; Jiang, Z. H.



The role of fluorine in the devitrification of SiO2·Al2O3·P2O5·CaO·CaF2 glasses  

Microsoft Academic Search

A series of eight glasses based on a glass system with the generic composition 1.5(5-Z)SiO2·(5-Z) Al2O3·1.5P2O5·(5-Z)CaO·ZCaF2 were studied where Z = 2, 1.75, 1.5, 1.25, 1, 0.5, 0.25, 0. These glasses were characterised using differential scanning calorimetry (DSC) and x-ray powder diffraction (XRD). Glasses with high fluorine contents were found to crystallise readily to fluorapatite via a homogeneous nucleation route

Ken Stanton; Robert Hill



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

Microsoft Academic Search

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 ×

Jie Fu



Role of modifier oxide in emission spectra and kinetics of Er-Ho codoped Na2SO(4)-MO-P2O5 glasses.  


The glasses of the composition 19Na(2)SO(4)-20MO-60P(2)O(5): 1.0Ho(2)O(3)/1.0Er(2)O(3) (M=Mg, Ca, and Ba) have been synthesized. Optical absorption and fluorescence spectra (in the spectral range 350-2100 nm were studied at ambient temperature. The spectra were characterized using Judd-Ofelt theory. From the luminescence spectra, various radiative properties like transition probability A, branching ratio ? and the radiative life time ? for blue (B), green (G) and red (R) emission levels of these glasses have been evaluated. The energy transfer between the two rare earth ions (Ho(3+) and Er(3+)) in co-doped Na(2)SO(4)-MO-P(2)O(5) glass systems in the visible and NIR regions has also been investigated. Highest intensity, the highest quantum efficiency and maximum energy transfer with low phonon losses of B, G, and R lines has been observed in BaO mixed glasses. The reasons for such higher values of these parameters have been discussed in the light of varying field strengths at the rare earths ion site due to replacement of one modifier oxide with the other. The enhanced intensity of NIR emission (at 2.0 ?m) has also been discussed in terms of cross relaxation of Er(3+) ions from (4)I(13/2) level to (5)I(7) of Ho(3+) ions. PMID:22112571

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



The Effect of Mechanical Milling Period on Conductivity of Li2O-TiO2-P2O5 System  

NASA Astrophysics Data System (ADS)

One of the most important criteria in determining the best electrolyte is by obtaining good value of conductivity. In this research, Li2O-TiO2-P2O5 system will be prepared in order to find the optimum composition and heat treatment of the samples that gives good conductivity value. The effects of mechanical milling period on glass-ceramics electrolyte in the system Li2O-TiO2-P2O5 have been investigated using X-Ray differential analysis and electrochemical impedance spectroscopy. Mechanical milling (MM) method was used to prepare the system which was converted into glass-ceramics by milled at several periods of time from 2 hours to 8 hours. Some crystalline phases with slight amorphous nature were detected in samples prepared by mechanical milling for 8 hours while single phase of LiTi2(PO4)3 were obtained from samples that underwent further heat treatment. The sample treated at 250° C for 4 hours obtained highest conductivity with a value of 1.12×104 Scm-1. The activation energy was found to be as low as 0.08 eV.

Faizal, A. F. A.; Majid, S. R.; Subban, R. H. Y.



Crystallization Behavior and Microstructure of Silica-Free 5K2O-45CaO-50P2O5 Bioglass  

NASA Astrophysics Data System (ADS)

The crystallization behavior and microstructure of silica-free 5K2O-45CaO-50P2O5 (KCP) bioglass have been studied using differential thermal analysis (DTA), X-ray diffraction (XRD), scanning election microscopy (SEM), transmission electron microscopy (TEM), and selected area electron diffraction (SAED). The activation energy for the KCP bioglass crystallization is found to be 337.4 kJ/mol using a nonisothermal method. The crystalline phases of the glass surface determined by XRD are KCa(PO3)3, 4CaO·3P2O5, and ?-Ca(PO3)2 when the KCP bioglass is crystallized at 903 K for 4 hours. The crystalline phase of the powder samples determined by XRD is ?-Ca(PO3)2 when silica-free KCP glasses crystallized at 873 to 1073 K for 8 hours. Crystallization starts at the surface of the KCP bioglass and then proceeds toward the interior of the glass matrix. The morphology of ?-Ca(PO3)2 is a fibrillar shape 20 to 180 nm in length and 17 to 20 nm in diameter, with an aspect ratio ranging from 1.0 to 10.6.

Wang, Moo-Chin; Lai, You-Cheng; Shih, Wei-Jen; Shih, Ping-Yu; Chen, Guo-Ju; Li, Wang-Long



Effect of nitridation on the aqueous dissolution of Na2O-K2O-CaO-P2O5 metaphosphate glasses.  


The use of oxynitride glasses is presented as an alternative for the preparation of bioresorbable phosphate glasses with a controlled dissolution rate. This work describes the design of oxynitride phosphate glasses within the systems of composition (50-x)Na(2)O·xCaO·50P(2)O(5) and (25-(x/2))Na(2)O·(25-(x/2))K(2)O·xCaO·50P(2)O(5) (x=5, 10, 15, 20 mol.%) throughout the processing parameters of the ammonolysis reaction and the glass composition. Mixed-alkali sodium-potassium phosphate glasses with low CaO contents present the best characteristics for nitridation. The dissolution rate has been determined by immersion of glass samples in water, at constant temperature of 37 °C, and has been discussed as a function of both modifiers composition and nitrogen content incorporated in the glasses through ammonolysis. All oxynitride glass compositions dissolve congruently and their dissolution rate decreases by more than three orders of magnitude for the highest nitrogen contents. However, it has been demonstrated that nitrogen contents as low as 2-3 wt.% (i.e. a 0.2N/P ratio) are sufficient to decrease the dissolution rate by one order of magnitude with respect to the pure oxide glasses. Novel oxynitride phosphate glasses with a controlled and congruent dissolution are proposed for future applications in biodegradable composite materials, tissue engineering or host matrices for the controlled release of drugs. PMID:21440095

Riguidel, Quentin; Muñoz, Francisco



Correlation between emission property and concentration of Sn2+ center in the SnO-ZnO-P2O5 glass.  


The authors report on the correlation between the photoluminescence (PL) property and the SnO amount in SnO-ZnO-P2O5 (SZP) glass. In the PL excitation (PLE) spectra of the SZP glass containing Sn2+ emission center, two S1 states, one of which is strongly affected by SnO amount, are assumed to exist. The PLE band closely correlates with the optical band edge originating from Sn2+ species, and they both largely red-shifts with increasing amount of SnO. The emission decay time of the SZP glass decreased with increasing amount of SnO and the internal quantum efficiencies of the SZP glasses containing 1~5 mol% of SnO are comparable to that of MgWO4. It is expected that the composition-dependent S1 state (the lower energy excitation band) governs the quantum efficiency of the SZP glasses. PMID:23262682

Masai, Hirokazu; Tanimoto, Toshiro; Fujiwara, Takumi; Matsumoto, Syuji; Tokuda, Yomei; Yoko, Toshinobu



Effect of magnesia on the degradability and bioactivity of sol-gel derived SiO2-CaO-MgO-P2O5 system glasses.  


Mesoporous 58SiO(2)-(38-x)CaO-xMgO-4P(2)O(5) glasses (where x=0, 5, 10 and 20 mol%) have been prepared by the sol-gel synthesis route. The effects of the substitution of MgO for CaO on glass degradation and bioactivity were studied in tris-(hydroxymethyl)-aminomethane and hydrochloric acid buffer solution (Tris-HCl) and simulated body fluid (SBF), respectively. It is observed that the synthesized glasses with various MgO contents possess the similar textural properties. The studies of in vitro degradability and bioactivity show that the rate of glass degradation gradually decreases with the increase of MgO and the formation of apatite layer on glass surface is retarded. The influences of the composition upon glass properties are explained in terms of their internal structures. PMID:20667433

Ma, J; Chen, C Z; Wang, D G; Jiao, Y; Shi, J Z



Properties and Structure of RO-R2O-Na2O-Al2O3-P2O5 Glasses  

SciTech Connect

The properties and structural features of RO-R2O-Na 2O-Al2O3-P2O5 (R= Mg, Ca, Ba and RO= Li) glasses in the system have been investigated. The properties of those glasses seem to depend on the field strength of the alkali or alkali-earth ions in glasses as in silicate glasses. Infrared (IR) spectroscopy indicates that the glass network is dominated by bridging P-tetrahedral present in glasses with O/P {approx_equal} 3.0. The variation in physical properties of the glasses seem to be closely related to the variation in structure of the glasses and could be explained by simple mechanism such as field strength and differences in mass.

Agus Setyo Budi; Ahmad, Asmala [Jabatan Sains and Math, Pusat Perkhidmatan Akademik, Kolej Universiti Teknikal Kebangsaan Malaysia, 75450 Ayerkeroh, Melaka (Malaysia); Safarudin Gazali Herawan [Faculty of Mechanical Engineering, Kolej Universiti Teknikal Kebangsaan Malaysia, 75450 Ayerkeroh, Melaka (Malaysia); Sunaryo [Physics Dept.-Faculty of Science, State University of Jakarta, Jakarta 13320 (Indonesia)



Preparation, structure and bioactivity of xAu2O3·(100 - x)[P2O5·CaO] glass system  

NASA Astrophysics Data System (ADS)

Gold doped calcium phosphate glasses were prepared by the melting method. The structure of Au2O3-P2O5-CaO glasses is investigated using X-ray diffraction, infrared absorption and Raman scattering. The depth characterization of their structures is essential for the understanding of the properties of biocompatible materials. Thermal analysis DTA and TGA were also made to study behavior under different temperature regions and to see chemical changes versus time and temperature of these glasses. Bioactivity of the glasses was investigated in vitro by examining apatite formation on the surface of glasses treated in acellular simulated body fluid (SBF) with ion concentrations nearly equal to those in human blood plasma. Formation of bioactive apatite layer on the samples treated in SBF for 28 days at 37 °C was confirmed by X-ray diffraction (XRD) and scanning electron microscope (SEM). The effect of SBF soaking induces structural changes on the surface, reflected by the appearance of nano-crystalline particles agglomerated into micro-aggregates.

Regos, Adriana N.; Ardelean, I.



Spectroscopic and EPR studies on PbO-Y2O3-P2O5 glasses doped with molybdenum ion  

NASA Astrophysics Data System (ADS)

The structure of 40PbO-(10-x) Y2O3-50P2O5: x MoO3 glass system with 0?x?5 mol% was prepared and investigated by IR, differential thermal analysis techniques, optical absorption and EPR spectroscopy. The characteristic IR bands of these glasses due to the stretching and bending vibrations were identified and analyzed by increasing of MoO3 content. The results of differential scanning calorimetric studies suggest that the glass forming ability is higher for the glasses containing MoO3 beyond 5 mol%. The intensity and frequency variations for the characteristic phosphate group vibrations have been correlated with the changes of the structural units present in these glasses. All the investigated samples exhibit EPR signals which suggest that the molybdenum ions exist in Mo5+ state with Mo6+ act as modifiers with MoO4 and MoO6 structural groups in these glasses. The shapes of spectra are also changed with the increasing of molybdenum ions content.

Lakshmana Rao, B.; Babu, Y. N. Ch. Ravi; Prasad, S. V. G. V. A.



[Clinical and histopathological observation of CaO-P2O5-MgO-SiO2-CaF system glass ceramic tooth implants in monkeys].  


The present study was undertaken to determine the biocompatibility of a newly-developed CaO-P2O5-MgO-SiO2-CaF system glass ceramic tooth implant. Two adult male monkeys were selected and 12 weeks after extraction of M1 and P1, 8 glass ceramic teeth were implanted into alveolar bone. At 1 week after implantation, 6 teeth were allowed occlusal function, and 2 teeth were left free from occlusion as control teeth. The implants were observed for 4-12 weeks and examined histopathologically. The results were as follows: 1. Seven implanted teeth were well maintained clinically, and only one tooth was lost after 5 weeks. 2. In histopathological observation, implanted teeth were surrounded by bone, and connected by bonyankylosis. At cervix of dental implant, connective tissue as also attached firmly to implanted tooth surfaces and epithelial attachment was observed. 3. Although these implants were allowed occlusal function at an early stage (1 week after implantation), osteogenesis around implants was not disturbed. These results suggest that the new glass ceramic implant has good biocompatibility and is useful as an implant tooth. PMID:2562273

Hongo, O; Mukainakano, Y; Asano, M; Kawanami, M; Kato, H



V2O5-P2O5 glass and its polaron transport properties derived from molecular dynamic simulations of structure  

NASA Astrophysics Data System (ADS)

Glasses containing transition metal ions show the Jonscher 'universal dynamic response' i.e. the ac conductivity, as a function of frequency, is given by (sigma) ((omega) ) equals (sigma) (0) + (omega) s, where (sigma) (0) is the dc conductivity, and the exponent s (P2O5 glasses. This behavior can be described in terms of overlapping polaron tunnelling model.In the model the polaron hopping energy is reduced when polaron wells in the pair of vanadium ions do overlap. The power law of ac conductivity is observed in the high frequency range when the hopping occurs only between the nearest sites. Distances between vanadium atoms and their distributions have been evaluated from molecular dynamic (MD) simulations. The MD simulations, according to the Andersen algorithm, have been performed in the isobaric-isoenthalpic ensemble. The atoms were assumed to interact by a two-body potential, with Abrahamson parameterization. In the base of the simulation results the polaron parameters have been determined.

Murawski, L.; Barczynski, R. J.; Rybicka, A.



MAS-NMR investigations of the crystallization behaviour of lithium aluminum silicate (LAS) glasses containing P2O5 and TiO2 nucleants  

NASA Astrophysics Data System (ADS)

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 disilicate (Li2Si2O5). 29Si MAS-NMR revealed a change in the network structure already for the glasses nucleated at 550 °C. Since crystalline Li3PO4, as observed by 31P MAS-NMR, forms concurrently with the silicate phases, we conclude that crystalline Li3PO4 does not act as a nucleating agent for lithium silicate phases. Moreover, 31P NMR indicates the formation of M-PO4 (M=B, Al or Ti) complexes. The presence of BO3 and BO4 structural units in all the glass/glass-ceramic samples is revealed through 11B MAS-NMR. B remains in the residual glass and the crystallization of silicate phases causes a reduction in the number of alkali ions available for charge compensation. As a result, the number of trigonally coordinated B (BO3) increases at the expense of tetrahedrally coordinated B (BO4). The 27Al MAS-NMR spectra indicate the presence of tetrahedrally coordinated Al species, which are only slightly perturbed by the crystallization.

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



Studies on Ag2O.MxOy.TeO2 (MxOy=WO3, MoO3, P2O5 and B2O3) ionic conducting glasses  

Microsoft Academic Search

Similarities and differences between the electrical, thermal and spectroscopic characterization results obtained by partial replacement of TeO 2 by WO3, MoO 3, P 2O5 & B2O3 in the form of yAg 2O.(1-y)(xMxOy.(1-x)TeO2) system are reported. It has been observed that the compositional variation of glass transition temperature is linear for WO3 and is non-linear for MoO3, P 2O5 & B

B. V. R. Chowdari; P. Pramoda Kumari



Medium-range order and physicochemical properties of (100 ? x )(0.5PbO · 0.5P 2 O 5 ) · x TeO 2 glasses in terms of the constant stoichiometry grouping concept  

Microsoft Academic Search

Glasses in the (100 ? x)(0.5PbO · 0.5P2O5) · xTeO2 section of the PbO-P2O5-TeO2 system have been synthesized over the entire composition range for the first time and their properties (Raman spectra, refractive\\u000a index n, density d, glass transition temperature T\\u000a \\u000a g\\u000a , and light scattering losses) have been investigated. It has been demonstrated that the Raman spectra can be

I. E. Apakova; V. K. Goncharuk; I. G. Maslennikova; I. G. Polyakova; A. V. Anan’ev; L. V. Maksimov; T. S. Markova; O. V. Yanush



Si-based light emission at 1530 nm with optical gain using mixture of Er2O3, P2O5, Yb2O3 nanoparticles and spin-on glass  

Microsoft Academic Search

We explore a new way of light emission at 1530 nm. The light-emitting layer contains the mixture of Er2O3 nanoparticles and spin-on glass. It is deposited on silicon wafers. This layer is very thin, but exhibits optical gain. We can also improve the emission efficiency by introducing P2O5 and Yb2O3 nanoparticles.

Kuo-Jui Sun; Ping-Hung Shih; Yi-Shin Su; Eih-Zhe Liang; Ching-Fuh Lin



Effect of partial crystallization on the mechanical properties and cytotoxicity of bioactive glass from the 3CaO.P(2)O(5)-SiO(2)-MgO system.  


The aim of this study is to report on the development and characterization of bioactive glass and glass-ceramics from the 3CaO.P(2)O(5)-SiO(2)-MgO-system, using different degrees of cristallinity for applications as an implant material. A methodology was proposed to induce crystallization of phases. Bioglass samples of the nominal composition (wt %) 57.75 CaO.P(2)O(5)-30 SiO(2)-17.25MgO were heat treated at temperatures ranging from 700 to 1100°C for 4h. The findings from the research illustrate how partial crystallization and phase transformations modified the microstructure of the based glassy material, resulting in improved mechanical properties. The maximum gain was measured for samples treated at 975°C, having a hardness of 6.2GPa, an indentation fracture toughness of 1.7MPam(1/2) and a bending strength of 120MPa, representing an increase of 30, 55 and 70%, respectively, when compared to the nucleated glass. The highest elastic modulus of about 130GPa was determined for samples treated at 1100°C. As a preliminary biological evaluation, "in vitro" cytotoxicity tests were realized to determine the cytotoxic level of the materials, using the neutral red uptake method with NCTC clones L929 from the American Type Culture Collection (ATCC) bank. On the other hand, no significant influence of the partial crystallization on cytotoxicity was observed. The results provide support for implant materials based on the 3CaO.P(2)O(5)-SiO(2)-MgO-system. PMID:22975418

Daguano, J K M F; Strecker, K; Ziemath, E C; Rogero, S O; Fernandes, M H V; Santos, C



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

Microsoft Academic Search

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,

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



Magnetic bioactive glass ceramic in the system CaO–P 2 O 5 –SiO 2 –MgO–CaF 2 –MnO 2 –Fe 2 O 3 for hyperthermia treatment of bone tumor  

Microsoft Academic Search

Magnetic bioactive glass ceramic (MG) in the system CaO–SiO2–P2O5–MgO–CaF2–MnO2–Fe2O3 for hyperthermia treatment of bone tumor was synthesized. The phase composition was investigated by XRD. The magnetic property\\u000a was measured by VSM. The in vitro bioactivity was investigated by simulated body fluid (SBF) soaking experiment. Cell growth\\u000a on the surface of the material was evaluated by co-culturing osteoblast-like ROS17\\/2.8 cells with

Guangda Li; Shuying Feng; Dali Zhou


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)

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.

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



Synthesis, bioactivity and preliminary biocompatibility studies of glasses in the system CaO-MgO-SiO2-Na2O-P2O5-CaF2.  


New compositions of bioactive glasses are proposed in the CaO-MgO-SiO(2)-Na(2)O-P(2)O(5)-CaF(2) system. Mineralization tests with immersion of the investigated glasses in simulated body fluid (SBF) at 37°C showed that the glasses favour the surface formation of hydroxyapatite (HA) from the early stages of the experiments. In the case of daily renewable SBF, monetite (CaHPO(4)) formation competed with the formation of HA. The influence of structural features of the glasses on their mineralization (bioactivity) performance is discussed. Preliminary in vitro experiments with osteoblasts' cell-cultures showed that the glasses are biocompatible and there is no evidence of toxicity. Sintering and devitrification studies of glass powder compacts were also performed. Glass-ceramics with attractive properties were obtained after heat treatment of the glasses at relatively low temperatures (up to 850°C). PMID:21188484

Tulyaganov, D U; Agathopoulos, S; Valerio, P; Balamurugan, A; Saranti, A; Karakassides, M A; Ferreira, J M F



Emitting 1530 nm light on Si with optical gain from light emitting layer consisting of Er2O3, P2O5, Yb2O3 nanoparticles and spin-on glass  

NASA Astrophysics Data System (ADS)

Emitting 1530 nm light on Silicon wafer is very useful because 1530nm is an important band in optical fiber communication. We explore a new way of light emission at 1530 nm. We demonstrate a simple and non-expensive process to form light-emitting layer. It can be deposited on silicon wafers. The properties of samples can be varied through controlling the composition. The emission efficiency can be further improved by introducing P2O5 and Yb2O3 nanoparticles into the solution. This emitting layer is able to show the signals only within several millimeters due to surface effect of nanoparticles, enabling the higher concentration of Er3+. The optical gain at 1530nm is measured using variable stripe length method. The gain coefficient can be as large as 18 cm-1.

Shih, Ping-Hung; Sun, Kuo-Jui; Su, Yi-Shin; Liang, Eih-Zhe; Lin, Ching-Fuh



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


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

Li, Guangda; Feng, Shuying; Zhou, Dali



[Application of CaO-P2O5-MgO-SiO2-CaF system glass ceramics to periodontal therapy. Histopathological observation after implantation in furcation bony defect in monkeys].  


This study was carried out in order to determine the efficacy of CaO-P2O5-MgO-SiO2-CaF system glass ceramics, which are made as implant materials, for treatment of furcation lesions. Glass ceramic granules were implanted in artificial class II furcation bony defects in monkeys. As controls, non-implanted sites were preserved. Radiographic and various clinical examinations were performed before surgery and at 0, 2, 4 and 8 weeks after implantation. Two, 4 and 8 weeks after implantation, two monkeys were sacrificed and the mandibles were sectioned for histopathological observation. The results obtained were as follows; 1. During the experiment, no clinical problems or abnormal response at the sites of glass ceramic implantation were observed. 2. In clinical observation, no remarkable differences were obtained between control sites and implanted sites. 3. Two and 4 weeks after surgery, remarkable regeneration of bone was shown in the implanted sites. However 8 weeks after surgery, the difference between implanted and control sites was not so clear. PMID:2562272

Mukainakano, Y; Hongo, O; Asano, M; Kawanami, M; Kato, H



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

SciTech Connect

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

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



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

NASA Astrophysics Data System (ADS)

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.

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



Influence of strontium on structure, sintering and biodegradation behaviour of CaO-MgO-SrO-SiO(2)-P(2)O(5)-CaF(2) glasses.  


The present study investigates the influence of SrO on structure, apatite-forming ability, physico-chemical degradation and sintering behaviour of melt-quenched bioactive glasses with the composition (mol.%): (36.07 - x) CaO-xSrO-19.24MgO-5.61P(2)O(5)-38.49SiO(2)-0.59CaF(2), where x varies between 0 and 10. The detailed structural analysis of the glasses is made by infrared spectroscopy and magic angle spinning-nuclear magnetic resonance spectroscopy. Silicon is predominantly present as Q(2) (Si) species, while phosphorus is found as orthophosphate in all the investigated glasses. The apatite-forming ability of glasses is investigated by immersion of glass powders in simulated body fluid for time durations varying between 1 h and 7 days. While increasing the Sr(2+)/Ca(2+) ratio in the glasses does not affect their structure significantly, their apatite-forming ability is decreased considerably. Further, physico-chemical degradation of glasses is studied in accordance with ISO 10993-14 "Biological evaluation of medical devices - Part 14: Identification and quantification of degradation products from ceramics" in Tris-HCl and citric acid buffer, and the possible implications of the ion release profiles from the glasses in different solutions are discussed. The addition of strontium to the glasses leads to a sevenfold decrease in chemical degradation of glasses in Tris-HCl. The sintering of glass powders renders glass ceramics (GCs) with varying degrees of crystallinity and good flexural strength (98-131 MPa), where the mechanical properties depend on the nature and amount of crystalline phases present in the GCs. PMID:21763793

Goel, Ashutosh; Rajagopal, Raghu Raman; Ferreira, José M F



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

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

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



Spectroscopic studies on Pb 3 O 4 -ZnO-P 2 O 5 glasses doped with transition metal ions  

NASA Astrophysics Data System (ADS)

Optical absorption, Electron Paramagnetic Resonance (EPR) studies are carried out on lead zinc phosphate glass systems doped with Cr 3+ and VO 2+ . From optical absorption investigations the crystal-field parameters Dq, B and C are evaluated. EPR measurements on Cr 3+ systems indicate that Cr 3+ ions are located at sites with low symmetry. EPR spectra of vanadyl doped system revealed the characteristic nature of vanadyl ion. Spin-Hamiltonian and hyperfine values are evaluated for both the systems. Optical absorption spectra of vanadyl doped system revealed three bands that are characteristic of VO(II) ion in tetragonally distorted octahedral site. By correlating both EPR and optical data, the dipolar coupling constant ( P ) and Fermi-constant coupling parameter ( ? ) and molecular orbital coefficients ? *2 , e ? *2 are evaluated. Electron Paramagnetic Resonance and optical absorption studies showed that the chemical bonds of Cr 3+ ions and VO 2+ ions with the ligands have more covalent nature. From these studies it is also observed that lead spinals are playing major key role in sustaining the covalent nature of bonding.

Giridhar, G.; Sreehari Sastry, S.; Rangacharyulu, M.



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

NASA Astrophysics Data System (ADS)

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

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



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

NASA Astrophysics Data System (ADS)

The crystallization mechanism and conductivity of lithium aluminum germanium phosphate [LAGP] glass-ceramics fabricated from Li 1+ x Al x Ge 2- x (PO 4 ) 3 ( x =0.0-0.7) glass system were investigated as a function of Al 2 O 3 additions. A non-isothermal analysis was performed to study the crystallization behavior of LAGP glass-ceramics at various heating rates (5-25K min -1 ) by the Kissinger equation and the Augis-Bennett equation, illustrating volume crystallization for the glass-ceramics. The crystal identification and microstructure in glass-ceramics containing various Al 2 O 3 contents were analyzed by means of XRD and FESEM. The main phase of the glass-ceramics was found to be LiGe 2 (PO 4 ) 3 , with AlPO 4 as the impurity phase. Additionally the highest total ionic conductivity (5.8×10 -4 S/cm) at room temperature was obtained when x =0.5 for Li 1+ x Al x Ge 2- x (PO 4 ) 3 ( x =0.0-0.7) glass-ceramics, suggesting that it was a promising electrolyte for practical application in all-solid-state lithium batteries.

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



P2O5-Hexamethyldisiloxane (HMDS): An Efficient System to Induce the Three-Component Reaction of Enolic Systems, Aromatic Aldehydes, and Acetonitrile  

Microsoft Academic Search

Three-component reaction of an enolizable compound, such as acetophenone, methyl acetoacetate, 4-hydroxycoumarin, 2-naphthol, or 3-hydroxy-2-naphthoic acid; an aromatic aldehyde, and acetonitrile induced by phosphorus pentoxide and hexamethyldisiloxane leads to 2-acetylamino ketones, methyl 3-(acetylamino aryl methyl)-3-oxobutanoates, 3-(acetylamino aryl methyl)-4-hydroxycoumarins, 1-(acetylamino aryl methyl)-2-naphthols, or 4-(acetylamino aryl methyl)-3-hydroxy-2-naphthoic acids in excellent yields.

Mohammad Anary-Abbasinejad; Hossein Anaraki-Ardakani; Alireza Hassanabadi



Phase equilibria in the P(2)O(5)-CaO-CaF(2)-NaF-H(2)O quinary system and the formation of apatite  

NASA Astrophysics Data System (ADS)

Phase equilibria among calcium phosphates in the Hsb3POsb4-Ca(OH)sb2-Hsb2O ternary system were determined as a basis for research in the formation of hydroxyapatite, a biomaterial. The acidic portion of the ternary diagram was established. Ca(Hsb2POsb4)sb2 was not stable for temperatures below 100sp°C. The experimental and theoretical dissolution paths of Ca(Hsb2POsb4)sb2{*}Hsb2O were compared. It is possible for the initial dissolution of Ca(Hsb2POsb4)sb2{*}Hsb2O to supersaturate the system with respect to hydroxyapatite because Ca(Hsb2POsb4)sb2{*}Hsb2O is "twice" incongruently soluble. Hydroxyapatite composition is variable with a Ca/P ratio ranging from 1.5 to 1.67. Hydroxyapatite formation from acid-base reactions of CaHPOsb4 and Casb4(POsb4)sb2O was investigated for composition at the terminal limits. The total heats-of-reaction (Delta Hsb{r}) were determined to be 261.3 and 320 kJ/mol for the formation of calcium deficient and stoichiometric hydroxyapatite, respectively. Activation energies of 84.7 and 87.4 kJ/mol were calculated for the formation of calcium deficient and stoichiometric hydroxyapatite, respectively. Heats-of-formation (Delta Hsb{f}) for Casb4(POsb4)sb2O and Casb9HPOsb4(POsb4)sb5OH were calculated to be -4764.1 and -1207.7 kJ/mol, respectively. The effects of magnesium on hydroxyapatite formation in vitro from CaHPOsb4 and Casb4(POsb4)sb2O at 37.4sp°C were investigated. Magnesium is a biological agent with 0.78 mM concentrations in blood. Magnesium inhibited nucleation for 1 mM concentrations and above for a 5 liquid-to-solids ratio. However, a 5 mM concentration of MgClsb2 slightly accelerated the growth rate. The activity of magnesium is approximately 6% of its concentration. Therefore the inorganic chemical activity of magnesium may not significantly inhibit the formation of bioapatites. Phase equilibria in the Psb2Osb5-CaO-CaFsb2-Hsb2O system at 37.4sp°C was determined and dental fluorosis explained. Fluoroapatite dissolves incongruently with respect to CaFsb2. Therefore, treatment of dentin and tooth enamel with fluoride leads to the formation of fluorosis because the solution first becomes supersaturated with CaFsb2. Based on thermodynamics, the conversion of hydroxyapatite to fluoroapatite cannot be a single exchange of fluoride for hydroxl. CaHPOsb4 hydrolysis and equilibrium in sodium fluoride solutions at 37.4sp°C reveal the added effect of sodium on the system. Sodium phosphate species form and overcome CaHPOsb4 incongruency. At initial NaF concentrations greater than 150 mM, NaF species rise and may overcome fluoroapatite incongruency.

Martin, Roger Isaac


EPR and magnetic properties of MgO-CaO-SiO2-P2O5-CaF2-Fe2O3 glass-ceramics  

NASA Astrophysics Data System (ADS)

Glass-ceramics have been derived from 4.5MgO(45-x)CaO34SiO216P2O50.5CaF2xFe2O3 (x=5, 10, 15, 20 wt%) glasses by heat treatment. Room temperature electron paramagnetic resonance (EPR) spectra and temperature-dependent magnetic susceptibility (?) of the glass-ceramics have been obtained. The EPR absorption line centered at g?4.3 disappeared at higher concentrations of iron oxide. The intensity and line width of the EPR absorption line centered at g?2.1 increased as the iron oxide concentration was increased. Temperature-dependent magnetization of samples with low iron oxide content revealed ferrimagnetic as well as paramagnetic contributions. Information about the structural changes involving iron ions, their valence state and the type of magnetic interactions between the Fe ions as a function of composition was obtained using EPR and ? studies.

Singh, Rajendra Kumar; Srinivasan, A.



Emitting 1530 nm light on Si with optical gain from light emitting layer consisting of Er2O3, P2O5, Yb2O3 nanoparticles and spin-on glass  

Microsoft Academic Search

Emitting 1530 nm light on Silicon wafer is very useful because 1530nm is an important band in optical fiber communication. We explore a new way of light emission at 1530 nm. We demonstrate a simple and non-expensive process to form light-emitting layer. It can be deposited on silicon wafers. The properties of samples can be varied through controlling the composition.

Ping-Hung Shih; Kuo-Jui Sun; Yi-Shin Su; Eih-Zhe Liang; Ching-Fuh Lin



Equilibrium relations in the system TiO2/V2O5/P2O5 and crystal structure of a NASICON-related vanadyl(V) titanium(IV) phosphate  

NASA Astrophysics Data System (ADS)

Vanadyl(V)-titanium-orthophosphate (VVO)TiIV6(PO4)9 is formed by solid state reactions in the temperature range 525???780 °C. At higher temperature decomposition into V2O5 and the hitherto unknown solid solution Ti(P1-xVx)2O7 (0?x?0.23; 0.30?x?0.43) is observed. The process of phase formation has been monitored by MAS-NMR (31P, 51V) spectroscopy. Equilibrium phase relations in the quaternary system TiO2/VO2.5/PO2.5 have been determined.A structure analysis from X-ray single-crystal data (P63/m (No. 176), Z=2; a=8.4438(3) Å, c=22.215(1) Å, 14 independent atoms, 87 variables, 2066 unique reflections, R1=0.032, wR2=0.084) shows the relationship of (VVO)TiIV6(PO4)9 to the NASICON structure family. In marked contrast to the other members of this family [TiIV2O9] double-octahedra and strongly distorted tetrahedral [(VV=O)O3] groups are observed besides isolated [TiIVO6] octahedra and phosphate tetrahedra. The structure model is in agreement with the results from MAS-NMR (31P, 51V) spectroscopy.

Titlbach, Sven; Hoffbauer, Wilfried; Glaum, Robert



Nam Con Son Basin  

Microsoft Academic Search

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

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



The Con Test  

ERIC Educational Resources Information Center

|In this article, the author describes the format of the Con Test, an Australian television game show which followed the same general rules and game play as the UK show PokerFace. At the end of each round a contestant needs to decide whether or not he or she should fold. A contestant needs to know how likely it is that he or she is in last place.…

Fletcher, Michael



Analisis de la serie de pruebas 'L' del proyecto ACE con el codigo corcon UW modificado. (Analysis of L test series of ACE project with modified corcon UW code).  

National Technical Information Service (NTIS)

A series of experimental tests (so call L, Large scale) have been performance under sponsored of many research institutions around the world and management by Electric Power Research Institute at U.S.A. The goal of these tests is to analyze the phenomena ...

H. Laguna Velasco



Anomalous AgI composition dependence of the thermal and dielectric properties of AgI Ag2O P2O5 glasses: evidence for the formation of amorphous AgI aggregate regions as dominating the fast Ag+ ion conduction  

Microsoft Academic Search

Heat capacities of (AgI)x(Ag3PO4)1-x glasses with x = 0.70 and 0.80 were measured to estimate the jump, DeltaCp, in the beta-glass transition due to freezing of the Ag+ ion rearrangement. Dielectric relaxation properties of (AgI)x(Ag2PO3.5)1-x with x = 0, 0.20, and 0.40 and (AgI)x(Ag3PO4)1-x glasses with x = 0.30 and 0.40 were examined to estimate the activation energies, Delta?a, along

Minoru Hanaya; Kousuke Echigo; Masaharu Oguni




Center for Food Safety and Applied Nutrition (CFSAN)

Text Version... 160°F Pavo, Pollo 165°F CARNE FRESCAS DE RES, CERDO, TERNERA, CORDERO 145°F con 3 minutos de descanso CARNE DE AVE ... More results from



Microsoft Academic Search

Effect of phosphorus fertilization on nutrient absorption and potato yield in Andisols of Costa Rica. The effect of P additions on potato yield and nutrient absorption was studied in a Hydric Hapludands soil. P rates of 0, 150, 300, 450, and 600 kg.ha-1 of P 2O5 were compared during 1 and 2 consecutive crops. Soil samples were taken before planting

Alfredo Alvarado; Isabel Iturriaga; Jot T. Smyth; Juan M. Ureña; Edward Portuguez


Synthetic slings: pros and cons.  


Historically, the choice of sling material for the treatment of urinary incontinence has been based on the surgeon's preference and experience. In general, pelvic surgeons have not differentiated artificial graft materials by their inherent qualities or for biocompatibility in the female pelvis and vaginal wall. The introduction of new artificial graft materials and new methods of implantation for the correction of genuine stress incontinence has generated renewed interest in the "pros and cons" associated with nonabsorbable material use. In this review, we discuss and differentiate sling materials and techniques. We consider some of the physical and biologic qualities of artificial graft materials, present theories and practices associated with the successful use of permanent grafts, and discuss the natural evolution of artificial graft slings to the current use of the tension-free vaginal tape and Suprapubic Arc Sling System (American Medical Systems, Minneapolis, MN). PMID:12354353

Staskin, David R; Plzak, Louis



¡Truco Con Agua!  

NSDL National Science Digital Library

En esta actividad los aprendices aprenderán un truco de magia donde la magia es la presión del aire. Los participantes tomarán un vaso de agua medio lleno y lo taparán con un pedazo de plástico o cartón. Sosteniendo la tarjeta contra el vaso, lo voltearán boca abajo y cuando quiten la mano debajo del vaso, ¡abracadabra! no se caerá el agua. En la tira cómica, Mateo explica a los aprendices que la presión que hace el aire en todas las direcciones es la que sostiene la tarjeta.

Science, Lawrence H.



Genetic polymorphism of CON 1 and CON 2 salivary proteins detected by immunologic and concanavalin a reactions on nitrocellulose with linkage of CON 1 and CON 2 genes to the SPC (salivary protein gene complex)  

Microsoft Academic Search

Two new genetic protein polymorphisms (CON 1 and CON 2) were identified in parotid saliva. Genetic polymorphisms of salivary CON 1 (concanavalin A) and CON 2 proteins are determined by autosomal inheritance of one expressed (dominant) and one unexpressed (recessive) allele for each gene. Autosomal inheritance is supported by studies in 26 families including 105 children for CON 1 and

Edwin A. Azen; Pao-Lo Yu



Automedicarse con antibióticos puede perjudicar su salud  

Center for Drug Evaluation (CDER)

... Automedicarse con antibióticos puede perjudicar su salud. (poster). ... Consulte a su médico oa un profesional de la salud antes de usar antibióticos. ... More results from


Automedicarse con antibióticos puede perjudicar su salud ...  

Center for Drug Evaluation (CDER)

... Automedicarse con antibióticos puede perjudicar su salud (PSA). ... Consulte a su médico oa un profesional de la salud antes de usar antibióticos. ... More results from


The Pros and Cons of Artificial Reefs  

NSDL National Science Digital Library

This lesson plan asks students to consider whether artificial reefs (human-made objects in the ocean or sea) are good for marine ecosystems. Students will look at pictures of artificial reefs and read articles describing the pros and cons of these structures. They will conclude by writing paragraphs explaining whether they think a new artificial reef should be created in Florida waters.


The pros and cons of hospital employment.  


The pros and cons of hospital employment vary significantly in today's economic environment. This chapter summarizes the advantages and disadvantages of hospital employment with an emphasis on the critical aspect of formalizing an agreement with the hospital employer to prevent future salary reductions and/or termination. PMID:23924751

Bert, Jack M



Google Scholar: the pros and the cons  

Microsoft Academic Search

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

Péter Jacsó



InterCon Travel Health: Case B  

ERIC Educational Resources Information Center

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

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



InterCon Travel Health: Case B  

ERIC Educational Resources Information Center

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

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



Somatic cell nuclear transfer: pros and cons.  


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

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




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



9 CFR 319.301 - Chili con carne with beans.  

Code of Federal Regulations, 2010 CFR

... 2010-01-01 2010-01-01 false Chili con carne with beans. 319.301 Section 319.301...Dehydrated Meat Food Products § 319.301 Chili con carne with beans. Chili con carne with beans shall contain not less...



9 CFR 319.301 - Chili con carne with beans.  

Code of Federal Regulations, 2010 CFR

... 2009-01-01 2009-01-01 false Chili con carne with beans. 319.301 Section 319.301...Dehydrated Meat Food Products § 319.301 Chili con carne with beans. Chili con carne with beans shall contain not less...



Jugando con geometría: Crear secuencias con formas y palabras  

NSDL National Science Digital Library

En esta actividad, los chicos crean secuencias con palabras y formas. Los chicos usan colecciones de triángulos, cuadrados, y rectángulos con palabras adentro. Los chicos organizan las forman en secuencias geométricas que se repiten o que cambian de manera sistemática en cada línea. Los chicos más jóvenes pueden crear secuencias simples; los mayores pueden explorar secuencias que crecen de diferentes maneras. Esta actividad tiene colecciones de palabras en tres niveles de dificultad diferente. Disponible en formato Web y PDF. También disponible en Inglés.




Pros and cons of phage therapy  

PubMed Central

Many publications list advantages and disadvantages associated with phage therapy, which is the use of bacterial viruses to combat populations of nuisance or pathogenic bacteria. The goal of this commentary is to discuss many of those issues in a single location. In terms of “Pros,” for example, phages can be bactericidal, can increase in number over the course of treatment, tend to only minimally disrupt normal flora, are equally effective against antibiotic-sensitive and antibiotic-resistant bacteria, often are easily discovered, seem to be capable of disrupting bacterial biofilms, and can have low inherent toxicities. In addition to these assets, we consider aspects of phage therapy that can contribute to its safety, economics, or convenience, but in ways that are perhaps less essential to the phage potential to combat bacteria. For example, autonomous phage transfer between animals during veterinary application could provide convenience or economic advantages by decreasing the need for repeated phage application, but is not necessarily crucial to therapeutic success. We also consider possible disadvantages to phage use as antibacterial agents. These “Cons,” however, tend to be relatively minor.

Loc-Carrillo, Catherine



The 2009 Astrobiology Graduate Student Conference (AbGradCon)  

NASA Astrophysics Data System (ADS)

The 2009 AbGradCon was held at the University of Washington in July 2009. It brought together 67 participants from 8 different countries and 34 different universities. AbGradCon also took place in the virtual world of Second Life.

Som, S. M.; Anderson, R.; Antonio, M.; Cash, M. C.; Claire, M.; Cowan, N.; Ewert, M.; Goldman, A.; Snowden, D.; Stüeken, E.



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


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

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



Cálculos ab initio con correlación electrónica  

NASA Astrophysics Data System (ADS)

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

Merchán Bonete, M.


Pro/con a precessional geodynamo  

NASA Astrophysics Data System (ADS)

The modest amount of research that exists on the ability, or lack of ability, of mantle precession to power a geodynamo developed mostly during the last half of the 1900s. Papers by Roberts and Stewartson (1965) and by Busse (1968) studied precession generally without a pro/con conclusion. Malkus in the late 1960s attempted to advance a positive role for precession through experiments and analysis. His experiments have survived criticism, but his analyses were discounted, especially by Rochester, Jacobs, Smylie, and Chong (1975) and by Loper (1975). Rochester, et al. critiqued existing analyses of precession, including those of Malkus, but did not reach a strong position either pro or con a precessional geodynamo. Loper argued emphatically that precession was not capable of powering the geodynamo. Explicit analyses that either critique or support Loper’s arguments have yet to appear in the literature. During the 1970s, Vanyo and associates studied energy dissipation during precession of satellite liquid fuels and its effect on satellite attitude stability. Engineers and scientists in every country that has launched satellites completed similar research. Some is published in the aerospace literature, more is available in company and government reports. Beginning in 1981, Vanyo and associates applied this knowledge to the very similar problem of energy dissipation and flow patterns in precessing mechanical models scaled geometrically and dynamically to the Earth’s liquid core. Energy experiments indicate massive amounts of mechanical energy are dissipated at the CMB, and flow experiments show complex motions within the boundary layer and axial flows with helicity throughout the interior. Analysis of Earth core precession also advanced, especially in several papers by Kerswell and by Tilgner in the late 1990s. Detail numerical models have yet to appear. Although progress in understanding the role of precession in Earth core motions has advanced, there remains a common belief, often expressed explicitly, that precession is incapable of energizing a geodynamo, a la Loper. We will present a critique of Loper’s 1975 paper and briefly discuss the common practice and belief that the geodynamo must be energized by thermal and/or compositional driven convection (motion). We note here that there is no observational evidence for existence of thermal or compositional convection within the liquid core or for growth of the solid core. Although there has been considerable success in adapting data in thermal/compositional models to yield near realistic solutions, that does not constitute a proof that those models apply to the Earth. There is absolute observational evidence for mantle precession, an Earth feature that is unique, along with the Earth’s magnetic field, among the terrestrial planets. We argue that great difficulty experienced in analysis and computation of precessional flow is a major explanation for its absence in current models of the geodynamo.

Vanyo, J.



Television and Children: A Pro/Con Reading List.  

ERIC Educational Resources Information Center

Lists books, audiovisual materials, newspaper articles, pamphlets, government documents, and periodical articles on the effects of television on children. Divided into sections on pro and con sources, the 53 annotated items are arranged by type of material. (BK)

Erbeck, Diane M.



Compositional Quality Control Study of CON-2 Glass.  

National Technical Information Service (NTIS)

A statiscal strategy was used to select experiments to determine how commonly measured physical properties of CON-2 glass vary with composition. The physical properties explored in the study included density, dilatometric softening temperature, thermal ex...

C. Nelson E. V. Thomas P. R. Wengert



Durabilidade de compósito biomassa vegetal-cimento modificado por polímero  

Microsoft Academic Search

DURABILITY OF CELLULOSE-CEMENT COMPOSITES MODIFIED BY POLYMER ABSTRACT: The durability of the cellulose-cement composites is a decisive factor to introduce such material in the market. Polymers have been used in concrete and mortar production to increase its durability. The goal of this work was the physical and mechanical characterization of cellulose-cement composites modified by a polymer and the subsequent durability

Lia L. Pimentel; Antonio L. Beraldo; Holmer Savastano Júnior



Breath analysis science at PittCon 2012, Orlando, Florida  

Microsoft Academic Search

BackgroundBreath analysis science was featured in three organized sessions at this year's Pittsburgh Conference and Exposition, or 'PittCon 2012' (http:\\/\\/\\/). 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,

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



Paramagnetic-to-Ferromagnetic Transition in Con Under Pressure  

NASA Astrophysics Data System (ADS)

Motivated by reports of synthesis of zincblende (ZB) structure CrAs in thin film form, strong interest has developed in understanding transition metal pnictides and their tendencies toward magnetic order.Literature on the experimental analysis of the structure of CoN is varied, with reports of both magnetically ordered NaCl structure CoN and non-magnetic ZB CoN. We present results of first principles analysis of electronic structure, magnetism and Murnaghan equation of state for both structures. The non-magnetic ZB structure, stable at ambient pressure transforms to a collapsed ferromagnetic NaCl phase at 10GPa (?V = -15%). These results will be compared to data and similarities/differences with other transition metal nitrides will be discussed.

Kasinathan, Deepa; Pickett, Warren



La fotoscintigrafia con Hg 203 e Tc 99 nella diagnosi delle lesioni cerebrali  

Microsoft Academic Search

Riassunto Gli AA presentano i risultati ottenuti con la fotoscintigrafia con Hg203 e Tc99 in 244 casi. Dopo aver osservato l'elevata positività con cui vengono diagnosticati i tumori cerebrali (64 casi su 65), gli autori considerano come sia più difficile con la scintigrafia rispetto alla gammaencefalografia porre una diagnosi di natura del tumore. I risultati positivi ottenuti nelle lesioni espansive

A. Agnoli; C. Fieschi; L. Bozzao; A. Bartolini



Aminoacidi liberi plasmatici nel diabetico dopo trattamento con insulina ed ipoglicemizzante orale  

Microsoft Academic Search

Riassunto In 30 pazienti diabetici (15 maschi e 15 femmine) sono stati determinati gli aminoacidi liberi plasmatici dopo trattamento con insulina (20 casi) e con ipoglicemizzante orale (10 casi), a compenso clinico e metabolico raggiunto. Il confronto statistico con i dati rilevati prima del trattamento terapeutico e con quelli relativi a 30 soggetti normali ha evidenziato l'azione «mirata» dell'insulina esogena,

Alberto M. Bertolini; Arturo Santagostino



Investigación Estudio sistematizado de familias con adolescentes y estilos de vida saludable  

Microsoft Academic Search

Al sistematizar la experiencia realizada junto a fami- lias con adolescentes, para construir con esta población estilos de vida saludable que favorecieran el crecimiento y desarrollo de los y las adolescentes, se relacionaron los procesos inmediatos y el quehacer con su contexto; a la vez, se confrontó dicho quehacer con los supuestos teóricos que los inspiraron. Se sustentó la experiencia


Caracterización de tintas de titanio dopadas con óxidos metálicos  

Microsoft Academic Search

Se prepararon tintas de Diisopropoxido de titanio bis(acetilacetonato) por el método sol-gel para aplicar en la elaboración de nanoestructuras mediante la técnica de escritura directa. Esta técnica permite estructurar materiales con alto índice de refracción a escala micro y nanométrica en tres dimensiones mediante extrusión, para elaborar cristales fotónicos. El tratamiento de las nanoestructuras extruidas a temperaturas elevadas para transformarlas



Exact Solutions of Diusion-Con vection Equations  

Microsoft Academic Search

In the presented paper known (up to the beginning of 2008) Lie- and non-Lie exact solutions of dieren t (1+1)-dimensional diusion{con vection equations of form f(x)ut = (g(x)A(u)ux)x + h(x)B(u)ux are collected.

Nataliya M. Ivanova



Pros and Cons of Part-Time Faculty.  

ERIC Educational Resources Information Center

A study of the pros and cons of part-time faculty shows that about one-third of all college faculty are part-time. They cost less, and are a valuable asset to a school, but may cause accrediting problems if they number more than 25 percent of the total faculty. (JMF)

AGB Reports, 1979



Desarrollo y transferencia tecnológica de pastas funcionales extendidas con leguminosas  

Microsoft Academic Search

RESUMEN. La pasta de sémola es un alimento altamente consumido, cuyo valor biológico es bajo porque su proteína es deficiente en lisina. Sin embargo, si se extiende la sémola con leguminosas ricas en este aminoácido esencial, no sólo se produce una complementación aminoacídica, sino que se incrementa el contenido de fibra dietética y de minerales. En este trabajo se produjeron

Marisela Granito; Vanesa Ascanio


Reputation, Social Identity and Social Con‡ict  

Microsoft Academic Search

We interpret the psychology literature on social identity and examine its implications in a population partially composed of such agents. We model a population of agents from two exogenous and well de…ned social groups. Agents are randomly matched to play a reduced form bargaining game. We show that this struggle for resources drives a con‡ict through the rational destruction of

John Smithy


SatisfacciÛn marital en pacientes con artritis reumatoide. Estudio comparativo con otras enfermedades crÛnicas y controles sanos  

Microsoft Academic Search

SUMMARY Objective: to assess marital satisfaction (MS) in patients with rheumatoid arthritis (RA) and com- pare it with other chronic diseases and normal con- trols. Material and methods: we studied 50 patients with RA and compared them with 50 patients with systemic lupus erythematosus (SLE), 50 patients with diabetes mellitus (type 2), and 50 normal controls. We applied a marital

Barile Fabris


The king of Comic-Con [Geek life  

Microsoft Academic Search

The last thing you want to do is rankle a group of Star Wars stormtroopers. The annual geekfest known as Comic-Con International is not only a four-day exploration of the intersection of science fiction, comics, science, and pop culture; with 125,000 attendees, it's one of the largest conventions in the world, requiring heroic feats of engineering to keep the lines

Susan Karlin



Neogene sequence stratigraphy, Nam Con Son Basin, offshore Vietnam  

Microsoft Academic Search

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

K. J. McMillen; E. K. Lee; S. S. Hong



A new compound, Ca3CoN3, with a trigonal planar [CoN3]6- anion  

NASA Astrophysics Data System (ADS)

A new compound, Ca3CoN3, was prepared in a reaction of Ca3N2 and cobalt fine powder under a nitrogen stream at 1000°C. It has a monoclinic unit cell with a = 6.308 Å, b = 5.137 Å, c = 5.933 Å, and ? = 75.1°. It is not isostructural with other A3MN3 but has a closely related structure with a trigonal planar [MN3]6- structural unit where A is an alkaline-earth metal and M = V, Cr, Fe. The Co3+ is assumed to be in a low spin d6 state and to be coordinated by three nitrogen atoms accepting nitrogen's 2p electrons to their d2s hybridized orbitals. Ca3CoN3 is nonmagnetic and semiconducting with a room temperature resistivity of 2.6 x 102 ? cm and with an activation energy of 0.02 eV.

Yamamoto, T.; Kikkawa, S.; Kanamaru, F.



Reputation Social Identity and Social Con‡ict  

Microsoft Academic Search

Abstract We interpret the psychology,literature on social identity and examine,its implications in a population,partially composed,of such agents. We model,a population,of agents from two,exogenous,and,well de…ned social groups. Agents are randomly,matched,to play a reduced,form bargaining,game.,We show,that this struggle for resources drives a con‡ict through,the rational destruction,of surplus. We assume,that the population contains both,rational players and behavioral,players. Behavioral players aggressively discriminate,against members,of the

John Smith


RoboCon: Operator interface for robotic applications  

SciTech Connect

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

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



Neogene sequence stratigraphy, Nam Con Son Basin, offshore Vietnam  

SciTech Connect

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.

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))



Gleevec disminuye la recidiva del cáncer en pacientes con tumor estromal gastrointestinal primario

Los resultados preliminares de un estudio clínico grande aleatorio y controlado con placebo, en pacientes con tumor estromal gastrointestinal (GIST) primario, un tipo de tumor que por lo general se encuentra en el estómago o en el intestino delgado, demostraron que los pacientes a los que se administró mesilato de imatinib (Gleevec®) luego de la extirpación total de su tumor tuvieron una probabilidad significativamente menor de padecer una recidiva del cáncer en comparación con aquellos a los que no se administró imatinib.


Niveles Plasmáticos de Insulina y Glucosa en Diabéticos Tratados con Glibenclamida y Clorpropamida  

Microsoft Academic Search

Riassunto  Sono stati studiati due gruppi di pazienti con diabete stabile dell’età matura, ciascuno costituito da 4 soggetti: il primo\\u000a (gruppo « A ») era stato trattato con glibenclamide durante 20,0 ± 1,1 mesi, il secondo (gruppo « B »), con clorpropamide\\u000a durante 44,2 ± 15,4 mesi. Dopo 3 determinazioni preliminari della glicemia (metodo di Somogyi-Nelson) e dell’insulinemia (metodo\\u000a di Meade

Carlos Aiello; Diego Turner; Néstor J. I. Aparicio; Elda A. de Turner; Alberto Vazquez



Light and Developmental Regulation of the Gene con-10 of Neurospora crassa  

Microsoft Academic Search

The gene con-10 of Neurospora crassa is expressed preferentially during conidiation and following illumination of vegetative mycelia with blue light. In this study we have examined the segmental locations of the genetic elements associated with con-10 that are responsible for light and developmental expression. A translational fusion was prepared between the initial segment of con-10 and Escherichia coli lacZ. Deletions

Luis M. Corrochano; Frank-Roman Lauter; Daniel J. Ebbole; Charles Yanofsky



Performance of the RespiCon personal aerosol sampler in forest products industry workplaces.  


The RespiCon is a multistage virtual impactor that can be used as either a personal or an area sampler. Particles collected on the first stage of the RespiCon represent the respirable fraction of airborne particulate matter. Particles collected on the first and second stages represent the thoracic fraction, and particles collected on the first, second, and third stages represent the inhalable fraction. The RespiCon is available in two versions, one with photometric aerosol detection and a gravimetric version. In this study, the performance of the gravimetric version was examined in various forest products industry facilities. The precision of the RespiCon was assessed and its performance was compared with that of both a respirable cyclone and an inhalable dust sampler. In addition, some RespiCon samples were examined using scanning electron microscopy to determine physical particle size distribution. Under the conditions of this testing, the RespiCon appeared to be reasonably precise. For most sampling locations there was a close correspondence between measurements made with the RespiCon and the CIS personal inhalable sampler or the BGI-4 respirable cyclone. The results of microscopic examination of filters from the RespiCon were consistent with expected performance characteristics. The RespiCon is a useful sampling device for those situations in which it is important to simultaneously collect either personal or area samples of the respirable, thoracic, and inhalable fractions of airborne particulate matter. PMID:12173181

Tatum, Vickie; Ray, Alison E; Rovell-Rixx, David


Pros and Cons of Medical Management of Ulcerative Colitis  

PubMed Central

Ulcerative colitis (UC) is a chronic inflammatory disease characterized by diffuse mucosal inflammation limited to the colon and rectum. Although a complete medical cure may not be possible, UC can be treated with medications that induce and maintain remission. The medical management of this disease continues to evolve with a goal to avoid colectomy and ultimately alter the natural history of UC. Emergence of antitumor necrosis factor-? (TNF-?) agents has expanded the medical armamentarium. 5-Aminosalicylates continue to be used in mild to moderate UC and corticosteroids are mainly used for induction of remission with immunomodulators (6-mercaptopurine/azathiopurine/methotrexate) being applied as steroid-sparing agents for maintenance therapy. Infliximab has been approved by the U.S. Food and Drug Administration and used in the treatment of moderate to severe UC; nevertheless, its use may be associated with significant adverse effects and have a negative impact on the postoperative course should the patients undergo restorative proctocolectomy. In addition, there is always a concern about patients' compliance to medical therapy, cost of medications, and risk for UC-associated dysplasia. The authors discuss the pros and cons of medications used in the treatment of UC.

Navaneethan, Udayakumar; Shen, Bo



Immune cascades in human intervertebral disc: the pros and cons  

PubMed Central

The unique structural hallmark of the intervertebral disc has made its central composition, the nucleus pulposus (NP), excluded from the immunologic tolerance. Consequently, the intervertebral disc is identified as an immune-privileged organ. Traditionally, local detrimental immune activities caused by NP at the lesion sites of the disc are noted as a significant factor contributing to disc degeneration. However, given the beneficial activities of immune cells in other immune-privileged sites on basis of current evidence, the degenerate disc might need the assistance of a subpopulation of immune cells to restore its structure and lessen inflammation. In addition, the beneficial impact of immune cells can be seen in the absorption of the herniated NP, which is an important factor causes the mechanical compression of nerve roots. Consequently, a modulated immune network in degenerate disc is essential for the restoration of this immune-privileged organ. Until now, the understandings of immune response in disc degeneration still rest on the harmful aspect. Further studies are needed to explore its beneficial influence. Accordingly, there are no absolutely the pros and cons in terms of immune reactions caused by NP.

Sun, Zhen; Zhang, Ming; Zhao, Xu-Hong; Liu, Zhi-Heng; Gao, Yang; Samartzis, Dino; Wang, Hai-Qiang; Luo, Zhuo-Jing



Soltando las Amarras - Algunas consideraciones sobre la cancelación de la deuda con el FMI  

Microsoft Academic Search

Este trabajo tiene por objeto analizar dentro de los resultados y proyecciones de la deuda pública, el sentido, impacto y efectos de la decisión gubernamental de cancelar la deuda pública nacional contraída con el FMI. En tal propósito se analizan los motivos que condujeron a la decisión de desendeudarse con el FMI, examinándo las propuestas alternativas a aquella solución, barajadas

Agustin Torres


Detección de anticuerpos antineuronas en pacientes con enfermedades del sistema nervioso: estudio preliminar  

Microsoft Academic Search

RESUMEN Con el objetivo de profundizar en la patogenia de enfermedades que involucren al sistema nervioso central, un colectivo de los laboratorios se dio a la tarea de detectar autoanticuerpos antineuronas en pacientes con estas enfermedades mediante la técnica de inmunofluorescencia indirecta. Se analizaron 31 sueros de pacientes y 72 controles, se obtuvo como resultado una sensibilida d de 77

Raisa Jofra Hernández; Arturo Muster; Roberto Alegre Mendez


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

ERIC Educational Resources Information Center

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

Combs, Joseph, Jr.



Alternative Cultural Heterotopia and the Liminoid Body: Beyond Turner at ConFest  

Microsoft Academic Search

This article takes issue with Victor Turner's influential, yet essentialist, category of the limen. While acknowledging Turner's continuing significance in the analysis of public events, I draw upon detailed ethnography of one of Australia's contemporary pilgrimage centres, the alternative lifestyle event ConFest, to reconfigure his project. Although ConFest may prove to be an exemplary field of liminality, as a decidedly

Graham St John



Gestational surrogacy: could be a way to be a way to reproduction? Pros and cons.  


The aim of this article was to address pros and cons of gestational surrogacy, the social and psychological issues involved in surrogate motherhood triads. Pros and cons of surrogacy, the possible insurgence of a hematologic disease in the fetus, hemolytic disease of the newborn, naturally acquired microchimerism in surrogacy cases, ethical, medical, psychologic, legal and religious issues of a problem are discussed. PMID:21778533

Clementina, Peris



Effect of Sup 60 Co gamma Rays on Con A and LPS Induced Lymphocytes.  

National Technical Information Service (NTIS)

The effect of /sup 60/Co gamma -rays on lymphocytes induced by Con A and LPS and the relationship between these two groups of cells were investigated by means of /sup 3/H-TdR incorporation. The study showed that in vitro, Con A cells were able to promote ...

Su L. Liu K. Ma X



CON1D: a computer program for calculating spherically symmetric droplet combustion  

Microsoft Academic Search

This report documents CON1D, a computer program which solves the balance equations describing the spherically symmetric vaporization or combustion of a liquid fuel droplet. CON1D is intended to complement the existing theory of droplet combustion by obtaining solutions in cases which are analytically intractable. For example, calculations are described which clearly demonstrate the effects of gas phase unsteadiness on droplet

R. D. Janssen; P. J. ORourke



A National Look at Postmodernism's Pros and Cons in Educational Leadership  

ERIC Educational Resources Information Center

The purpose of this article is to take a look at the pros and cons of postmodernism. It is imperative for administrators to closely examine educational theories and practices prior to instituting changes. The ability to read and digest challenging material keeps one informed and prepared to lead effectively. This paper will list the pros and cons

Townsell, Rhodena



La gestión de las relaciones con clientes y la empresa de alta rentabilidad de Galicia  

Microsoft Academic Search

RESUMEN La gestión de las relaciones con los clientes es un factor diferencial de las empresas de alta rentabilidad (AR), organizaciones que poseen un elevado rendimiento económico. El presente trabajo propone profundizar en la gestión de clientes como fuente de ventaja competitiva, aplicando la perspectiva de los recursos y capacidades. Con esta finalidad, ofrecemos los resultados obtenidos tras la realización

Pablo Cabanelas Lorenzo; Anxo Moreira



Day\\/Night and Circadian Rhythm Control of Con Gene Expression in Neurospora  

Microsoft Academic Search

In the filamentous fungus Neurospora crassa, several events in the process of conidiation are influenced by light. Two genes, con-6 and con-10, which were previously shown to be transcriptionally activated during conidiation and by exposure to light, were found to be unexpressed in mycelium maintained in constant darkness or in constant light. However, when mycelium was shifted from darkness to

Frank-Roman Lauter; Charles Yanofsky



Determination of composition in stoichiometric Co-N ultrathin films by nitrogen plasma sputtering  

SciTech Connect

This work utilizes low-energy sputtering to incorporate the generated nitrogen plasma into an epitaxial 1.4 nm Co film on the surface of a ZnO(002) substrate. In this method, ultrathin Co-N amorphous films were formed. Interestingly, Co is key to the formation of Co-N films. Without the deposition of Co on the ZnO(002), nitride films cannot be formed. Observations of the surface composition of the Co-N films after the firing of a N{sup +} ion beam onto it demonstrated that the surface concentration of Co reduced at the same rate as the reduction in the concentration of N upon successive sputtering. Theoretical calculations based on the Auger peak-to-peak amplitudes established that the composition of the amorphous Co-N thin films may be Co{sub 3}N{sub 2}.

Su, C. W.; Huang, M. S.; Chang, Y. C.; Tsai, T. H. [Department of Applied Physics, National Chiayi University, 300 Syuefu Rd., Chiayi 60004, Taiwan (China); Lee, Y. H.; Lee, J. C. [Department of Physics, National Cheng Kung University, 1 University Rd., Tainan 70101, Taiwan (China)



The Environmental Impact of Supplying Power to the Con Edison Service Territory: 1975-1990.  

National Technical Information Service (NTIS)

This report describes present and anticipated environmental consequences of meeting electricity demand in the Con Edison service territory--New York City and most of Westchester County. Important issues include nuclear power, air pollution, water and aqua...

A. K. Freedman J. C. Cohen



Il trattamento di una grave neuropatia diabetica con insulina somministrata per via endorachidea  

Microsoft Academic Search

Riassunto Viene descritto un caso di grave poliradicoloneurite diabetica che non aveva tratto alcun miglioramento da un lungo trattamento con vitamina B1 e B12 ad alti dosaggi. Esso giunse a guarigione somministrando insulina direttamente nello speco vertebrale.

Sergio Marigo; Enrico Ferrero



All Frames Are Not Equal: Framing and Con?ict Displacement  

Microsoft Academic Search

Abstract Issue framing afiects individual opinions, mass sentiment, and policy. While most frames reinforce the status quo distribution of opinion, occasionally frames redraw the line of debate. These \\\\con?ict- displacing\\

Suzanna De Boef; Frank R. Baumgartner; Amber E. Boydstun; Frank E. Dardis; Fuyuan Sheny


Quimioterapia de alta dosis prolonga en forma significativa la supervivencia en pacientes con leucemia mieloide aguda

Los resultados preliminares de un estudio clínico grande con asignación al azar de pacientes de 16 a 60 años de edad con leucemia mieloide aguda (LMA), un cáncer de la sangre y de la médula ósea, que no había sido tratada anteriormente, muestran que los pacientes que recibieron una alta dosis de daunorrubicina, un fármaco de quimioterapia disponible comercialmente, durante la terapia inicial vivieron más que los pacientes que recibieron una dosis normal del mismo fármaco.


Análisis comparativo de 3 regímenes de tratamiento en niños con linfoma de Burkitt  

Microsoft Academic Search

Resumen  De enero de 1980 a junio de 1996 se trataron en nuestra institución un total de 86 pacientes con linfoma de Burkitt. El presente\\u000a estudio es una revisión retrospectiva en el que se comparan las complicaciones y los resultados de sobrevida utilizando 3\\u000a esquemas de tratamiento distintos.\\u000a \\u000a Se trataron 46 pacientes en el régimen 1, 26 con el régimen 2,

Rocío Cárdenas Cardós; Roberto Rivera Luna; Roxana Martínez Agreda; Carlos Calderón Elvir; Amparo Plata García



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

Microsoft Academic Search

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




FReCon: a fluid remote controller for a FReely connected world in a ubiquitous environment  

Microsoft Academic Search

In this paper, we propose a Fluid Remote Controller, a general-purpose remote controller based on the ubiquitous computing view. FReCon offers remote control features over a wide range of appliances located within a room, with a unique controller implemented on portable devices like PDAs, handheld PCs, mobile phones, etc. More than the controller itself, FReCon means the whole FReely Connected

Alexandre Sanguinetti; Hirohide Haga; Aya Funakoshi; Atsushi Yoshida; Chiho Matsumoto



THE BATTLE OF THE BANDS ConFest Musics and the Politics of Authenticity  

Microsoft Academic Search

he Australian alternative lifestyle event ConFest (Conference\\/Festival) harbours a dynamic 'underground' music culture. This article investigates the role performed by musics in efforts to establish and maintain 'sanctified' space, and a concomitant sense of community, at Australia's principal alternative cultural pilgrimage destination. The performance, aesthetics and sociality of musics are pivotal in struggles over the definition and purpose of ConFest.




Microsoft Academic Search

La partecipazione di ARPA-SIM al progetto Interreg SEDEMED ha riguardato, per la parte meteorologica, lo studio dei fenomeni siccitosi in Emilia-Romagna attraverso l'indice SPI (Standardized Precipitation Index) e la sua correlazione con la circolazione atmosferica a larga scala e con pattern di variabilità atmosferica, quali la NAO (North Atlantic Oscillation). In ambito agrometeorologico è stata invece studiata la siccità agricola,



SciTech Connect

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.




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

SciTech Connect

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.

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



Pros and cons: prospective predictors of marijuana use on a college campus.  


Marijuana use on college campuses is prevalent and associated with high rates of abuse and dependence. The Marijuana Decisional Balance (MDB) scales measure perceived pros and cons toward marijuana use. Evidence supports reliability and concurrent validity of these scales, but the predictive validity has not yet been assessed. The current study evaluated the prospective predictive validity of pros and cons scales for marijuana use, as well as explored predictive validity for marijuana problem indicators. Secondary analyses included test-retest reliability and internal consistency, to provide additional evidence of psychometric properties. A total of 149 college students (57% recent marijuana users, 77% lifetime users) participated in a baseline survey, then completed a second survey one month later. All provided data on marijuana pros and cons, as well as use status in the past month. Users at each time point reported on use frequency, problems, and disorder symptoms. In the month between assessments, 55% of the students used marijuana. Both pros and cons subscales prospectively predicted use status in the subsequent month, but not use frequency. Pros prospectively predicted marijuana problems and dependence symptoms at follow-up, and remained a significant predictor of later dependence symptoms even after controlling for baseline dependence symptoms. In contrast, pros only marginally predicted abuse. Cons did not predict problems, abuse, or dependence symptoms. Pros and cons showed strong test-retest reliability (rs = 0.80-0.85) and internal consistency (alphas = 0.92-0.95). In a college sample, pros and cons of marijuana use demonstrated stability over one month, and prospectively predicted use. Pros may also have utility in predicting problems and dependence potential on college campuses. PMID:22985053

Elliott, Jennifer C; Carey, Kate B



Influence of in vitro irradiation upon LIF production by ConA stimulated mononuclear cells  

SciTech Connect

Leukocyte migration inhibitory factor (LIF) activity of culture supernatants of in vitro irradiated Concanavalin A (ConA) stimulated lymphocytes was tested by measuring granulocyte migration from clotted plasma droplets placed in flat bottom microplates. The specificity of inhibition was assured by pretreating the assay supernatants with anti-LIF antibodies which abrogated granulocyte migration inhibition but did not impair guinea pig Peritoneal Exudate Cells (PEC) migration inhibition. In vitro irradiation (150-1200 rad) of MNC cultures either before or after ConA stimulation did not impair lymphokine production and sometimes significantly improved the supernatants' LIF activity as compared with that of unirradiated cultures. The existence of radiosensitive suppressor cells regulating LIF production by ConA stimulated mononuclear cells is suggested.

Sandru, G.; Veraguth, P.



Influence of in vitro irradiation upon LIF production by ConA stimulated mononuclear cells  

SciTech Connect

Leukocyte migration inhibitory factor (LIF) activity of culture supernatants of in vitro irradiated Concanavalin A (ConA) stimulated lymphocytes was tested by measuring granulocyte migration from clotted plasma droplets placed in flat bottom microplates. The specificity of inhibition was assured by pretreating the assay supernatants with anti-LIF antibodies which abrogated granulocyte migration inhibition but did not impair guinea pig Peritoneal Exudate Cells (PEC) migration inhibition. In vitro irradiation (150-1200 rads) of MNC cultures either before or after ConA stimulation did not impair lymphokine production and sometimes significantly improved the supernatants' LIF activity as compared with that of unirradiated cultures. The existence of radiosensitive suppressor cells regulating LIF production by ConA stimulated mononuclear cells is suggested.

Sandru, G.; Veraguth, P.



Distribución espacial de cúmulos y asociaciones estelares con diferentes edades en la Nube Mayor de Magallanes  

NASA Astrophysics Data System (ADS)

Sobre la base de observaciones realizadas en Cerro Tololo y el Casleo, se presenta un catálogo con fotometría UBV integrada de 504 cúmulos y 120 asociaciones estelares en la Nube Mayor de Magallanes. Se determinan edades en términos de los tipos SWB y se identifican 38 cúmulos tipo VII, muchos de los cuales pueden ser cúmulos globulares clásicos. El tamaño de las distribuciones espaciales crece uniformemente con la edad (tipo SWB), en tanto que existe una diferencia en el cociente axial entre los grupos más jóvenes y más viejos que 30 millones de años, lo que implica una orientación aproximadamente de frente para los primeros y una posición inclinada ~ 45o para el segundo grupo. Las asimetrías en las distribuciones espaciales, juntamente con la falta de coincidencia de los centroides de los diferentes grupos de edad, sugiere que el disco de la Nube Mayor de Magallanes fue severamente perturbado en el pasado.

Bica, E.; Clariá, J. J.; Dottori, H.; Santos, J. F. C.; Piatti, A. E.


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

SciTech Connect

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 deduced from published PRP DNA sequences, Con proteins are probably encoded within exon 3 of the PRB2 gene. Both PRB2 alleles were then cloned from an individual with the Con1/Con 2 phenotype and one PRB2 allele from the individual with the Con 0 phenotype. From DNA sequence analysis, Con 1 is probably a 124 aa protein that is derived by proteolytic processing from a larger precursor, and there are two signals (NKS) for asparagine-linked carbohydrate attachment. However, from the n-terminal protein sequence, the first site is not used. A single nucleotide substitution in the Con 0 allele causes a coding change mutation [TCT (Ser){yields}CCT(Pro)] that abolishes the postulated single functional carbohydrate attachment site (NKS{yields}NKP) and explains the absence of Con 1 protein staining on the Western blot in Con 0 homozygotes. The n-terminal sequence of the Con 2 protein was not encoded in either PRB2 allele from the individual with the Con 1/Con 2 phenotype and must be encoded by another PRB locus. The non-glycosylated 70 aa Po protein which shows Po+ and Po- phenotypes was known to be encoded by exon 3 of the PRB4 gene. The DNA sequence from exon 3 of PRB4 from an individual with the Po- phenotype was compared to that previously published from a Po+ individual. A nucleotide substitution was found at the {open_quotes}invariant{close_quotes} +1 position [GT{yields}CT] of the exon 3 5{prime}-splice site. This mutation adequately accounts for the Po- phenotype.

Azen, E.A.; Amberger, E. [Univ. of Wisconsin, Madison, WI (United States)



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

NASA Astrophysics Data System (ADS)

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.

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



Salud con Sabor Latino: a culturally sensitive obesity prevention curriculum in an underserved Latino community  

Microsoft Academic Search

Salud con Sabor Latino is a culturally sensitive obesity prevention curriculum that incorporates the traditions and values of the Latino community and family. The 4-week curriculum meets twice a week and includes an education and cooking component. Key components of the curriculum are portion size, reading food labels, taking small steps, eating a variety of foods, and the importance of

Christina Araiza; Maria Valenzuela; Bonnie Gance-Cleveland



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

ERIC Educational Resources Information Center

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

Consolidated Edison Co., Brooklyn, NY.


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

Microsoft Academic Search

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

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



The pros and cons of computing the h-index using Google Scholar  

Microsoft Academic Search

Purpose – A previous paper by the present author described the pros and cons of using the three largest cited reference enhanced multidisciplinary databases and discussed and illustrated in general how the theoretically sound idea of the h-index may become distorted depending on the software and the content of the database(s) used, and the searchers' skill and knowledge of the

Pe´ter Jacso´



Sludge Particle Separation Efficiencies During Settler Tank Retrieval Into SCS-CON-230.  

National Technical Information Service (NTIS)

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 Sludg...

J. I. Dearing M. Epstein M. G. Plys




Microsoft Academic Search

El chile jalapeño provoca un alto nivel de irritación a diferentes niveles del tracto estomacal en comparación con el chile habanero. A pesar de que el chile habanero presenta una mayor capacidad pungente, no es irritante. A la fecha se desconoce la naturaleza de los compuestos responsables de este efecto. En el presente trabajo se reporta el análisis preliminar de

Salvador Horacio; Guzmán Maldonado; Irineo Torres Pacheco; Mario González Chavira; María Alejandra; Mora Avilés; Guadalupe Herrera Hernández; David Hernández López


Immunostimulatory activity of ConBr: a focus on splenocyte proliferation and proliferative cytokine secretion.  


Lectins constitute a class of glycoproteins, which are capable of selectively and reversibly binding to carbohydrates, distinguishing small structural differences in complex oligosaccharides. Studies have shown that the binding of lectins to cell-surface carbohydrates can lead to various effects such as cellular proliferation, histamine release and cytokine production. Canavalia brasiliensis lectin (ConBr) is a (D-mannose) D-glucose lectin. In this study, murine splenocytes were cultured to determine the effect of ConBr on cell proliferation, nitric oxide (NO) release and cytokine secretion. In addition, cellular viability assays were performed to evaluate any mitogenic activity induced by this lectin. ConBr significantly increased cell proliferation with minimal cell damage. This lectin was able to induce an increased production of cytokines such as IL-2, IL-6 and IFN-? and a decreased production of IL- 10. The release of NO was also observed. The results of this study indicate that ConBr could potentially be used as an immunomodulator. PMID:22009293

de Oliveira Silva, Flávio; das Neves Santos, Priscila; de Melo, Cristiane Moutinho Lagos; Teixeira, Edson Holanda; de Sousa Cavada, Benildo; Arruda, Francisco Vassiliepe Sousa; Cajazeiras, João Batista; Almeida, Alysson Chaves; Pereira, Valéria Alves Rêgo; Porto, Ana Lúcia Figueiredo



Stress state in the Cuu Long and Nam Con Son basins, offshore Vietnam  

Microsoft Academic Search

The results presented in this paper are the first published estimates of the complete stress tensor in the Cuu Long and Nam Con Son basins, offshore Vietnam. We analysed in situ stress and pore pressure fields in the sedimentary formations using data from petroleum exploration and production wells to evaluate the stress state in these basins. The data were obtained

Nguyen Thi Thanh Binh; Tomochika Tokunaga; Neil R. Goulty; Hoang Phuoc Son; Mai Van Binh



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

Microsoft Academic Search

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

A. J. Fraser; S. J. Matthews; S. Lowe; S. P. Todd; Simon; F. J. P. Peel



The pros and cons of Microsoft Academic Search from a bibliometric perspective  

Microsoft Academic Search

Purpose – This paper aims to look at the pros and cons of Microsoft Academic Search (MAS) from a bibliometric perspective. Design\\/methodology\\/approach – This paper describes the major content and software features of MAS, and its shortcomings. Findings – The paper recommends some further enhancements, and the use of care and caution when interpreting the metrics produced by cited reference

Péter Jacsó



Are You Ready to Go Digital?: The Pros and Cons of Electronic Portfolio Development  

ERIC Educational Resources Information Center

|There is an increasing need for educators to have professional portfolios, which are considered to be authentic tools for evaluating the knowledge, skill, beliefs and attitudes of prospective educators. Electronic portfolios are gaining in popularity and their relative pros and cons are examined.|

Heath, Marilyn



Quattordici Punti di accordo con i rapporti ufficiali governativi sulla distruzione del World Trade Center  

Microsoft Academic Search

I rapporti di FEMA e NIST contengono la versione ufficiale sulla distruzione del World Trade Center, avvenuta l'11 settembre 2001. In questa lettera vogliamo porre le basi per una discussione costruttiva e chiarificatrice, focalizzandoci sui punti di comune accordo con FEMA e NIST, e refutando nel contempo diverse credenze errate sui crolli del WTC. L'undici settembre 2001 le Torri Gemelle

Steven E. Jones; Frank M. Legge; Kevin R. Ryan; Anthony F. Szamboti; James R. Gourley


Evaluación del estado de salud con la Encuesta SF36: resultados preliminares en México  

Microsoft Academic Search

Objective. To establish a multidimensional profile of the health status in a population of southeastern Mexico and analyze the psychometric properties of a translation of the SF-36 survey authorized by the International Quality of Life Assessment Project. Material and methods. The SF-36 was administered to 257 volunteers of a clinic and a con- trol group in a governmental institution. The

Miguel A. Zúniga; Genny T. Carrillo-Jiménez; Peter J. Fos; Barbara Gandek; Manuel R. Medina-Moreno



Comparison of radiosensitivity of human lymphocytes stimulated with PHA Con A and PWM.  

National Technical Information Service (NTIS)

The transformation, DNA strand breaks and its repair ability in human peripheral blood lymphocytes stimulated with PHA, Con A and PWM were respectively assessed following exposure to (sup 60)Co gamma rays by (sup 3)H-thymidine uptake and hydroxylapatite c...

Y. Geng L. Su




Microsoft Academic Search

The use of toxicological animal models for the safety assessment of compounds such as pesticides and food additives is well established. In these cases, animals are directly fed such compounds at a range of doses some several orders of magnitude greater than the expected for human consumption and safe intake levels are estimated by the application of appropriate safety factors.




Índice de Comportamiento Objetivo. Una medida para valorar la respuesta al tratamiento de pacientes con trastornos de personalidad graves  

Microsoft Academic Search

Una medida que capta la frecuencia e intensidad de comportamientos disfuncionales experimentados, así como el uso de los servicios de salud mental, se desarrollaron y probaron como parte de un ensayo de tratamiento controlado de pacientes con trastorno de personalidad borderline. El índice de comportamiento objetivo (ICO) se realizó con 136 individuos diagnosti- cados de trastorno de personalidad borderline antes

Heather Munroe-Blum; Lynn McClearly


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

Federal Register 2010, 2011, 2012, 2013

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



Railroad Accident Report - Rear End Collision of Two ConRail Freight Trains, Stemmers Run, Baltimore, Maryland, June 12, 1977.  

National Technical Information Service (NTIS)

About 11:03 p.m., on June 12, 1977, ConRail freight train WA-4 collided with the rear of ConRail freight train WA-6. A fire began in the lead locomotive unit of train WA-4 and in the caboose of train WA-6. Damage was about $300.000. Two crewmembers on eac...




Microsoft Academic Search

Resumen Objetivos: Explorar la hipótesis de que una personalidad de relaciones y de comunicación res- tringida, pérdidas personales penosas aunque no extraordinarias pero con incapacidad de afrontar positivamente las mismas, y una desmotivación plural persistente que se ensambla con un auto bloqueo perceptivo, constituyen una secuencia y un perfil peculiar de las personas que concluyen en Alzheimer, a dife- rencia



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

PubMed Central

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

Hartmann, Thomas; Schulz, Hannah; Weisz, Nathan



ConBr, a lectin from Canavalia brasiliensis seeds, protects against quinolinic acid-induced seizures in mice.  


Lectins are proteins capable of reversible binding to carbohydrates or glycoconjugates. In the central nervous system of mammals, lectins with affinity for mannose/glucose or galactose can modulate cellular communication. ConBr, a lectin isolated from the seeds of Canavalia brasiliensis, previously showed antidepressant effect in the forced swimming test in mice, with involvement of the monoaminergic system. In this study, we investigated the neuroprotective effects of ConBr against quinolinic acid (QA), a well-known NMDA agonist that produces severe neurotoxicity when administered in vivo. ConBr (10 ?g/site) administered via intracerebroventricular (i.c.v.) showed a neuroprotective activity against seizures induced by QA (36.8 nmol/site; i.c.v.) when administered 15 min prior to QA, with a percentage of protection around 50%. ConBr was also able to significantly decrease the severity of the seizures but without changes in the latency of the first convulsion or the duration of the seizures. This effect was dependent on the structural integrity of the ConBr protein and its binding capacity to oligosaccharides residues. ConA, a lectin with high similarity to ConBr, did not reverse the QA-induced seizures. Moreover, ConBr was able to protect against hippocampal cell death caused by QA, which was measured by propidium iodide incorporation. QA caused activation of JNK2 and improved the phosphorylation of Ser831 and 845 on the AMPA receptor GluR1 subunit, and both of these effects were counteracted by ConBr. Our data suggest that the lectin ConBr may exert a modulatory action on NMDA receptors, which inhibits its activity in response to QA. PMID:21948344

Russi, Michael A; Vandresen-Filho, Samuel; Rieger, Débora K; Costa, Ana Paula; Lopes, Mark W; Cunha, Rodrigo M S; Teixeira, Edson H; Nascimento, Kyria S; Cavada, Benildo S; Tasca, Carla I; Leal, Rodrigo B



Anticipated Stigma and Stigma Management Among Those to be Labeled “Ex-con  

Microsoft Academic Search

Male prisoners (n = 450) estimated public reaction to the label “ex-con” and endorsed likely stigma management strategies. Although most anticipate significant rejection, they prefer preventative telling to withdrawal and secrecy as adjustments. OLS regression finds factors promoting exclusion (devaluation\\/discrimination beliefs and reduced job opportunities) related to withdrawal and secrecy, whereas factors favoring inclusion (“wise” family and friends and plans to attend

Terri A. Winnick; Mark Bodkin



Effect of ConA-receptor interaction on the structure of cell membrane  

Microsoft Academic Search

Recently, the effect of ligand receptor interaction on the membrane structure of liposomes has been studied extensively. However, little is known about how it exists on biological membranes. In this paper, the effect of Concanavalin A (ConA) receptor interaction on the structure of cell membranes was studied by Circular Dichroism (CD) and 31P Nuclear Magnetic Resonance (NMR).CD results of both

Jianwu Dai; Qun Dong; Yaxian Su; Kechun Lin



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

SciTech Connect

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




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

NASA Astrophysics Data System (ADS)

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.

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



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

Code of Federal Regulations, 2013 CFR

...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...



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

Code of Federal Regulations, 2010 CFR

...2009-07-01 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...



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

Code of Federal Regulations, 2010 CFR

...2010-07-01 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...




Microsoft Academic Search

Las habilidades sociales son un numeroso y variado conjunto de conductas que se ponen en juego en situaciones de interacción social, es decir, en situaciones en las que hay que relacionarse con otras personas. La Interacción social se refiere a las conductas necesarias para interactuar y relacionarse con los iguales y con los adultos de forma efectiva y mutuamente satisfactoria.

Elizabeth Gómez Núñez; Olga Lidia Núñez Rodriguez; Nemesio Jiménez Cepero; Ángel Luis Gómez Cardoso



Correlación entre la estructura de bandas y las propiedades físicas de óxidos cerámicos de estructura perovskita con metales de transición (I): Propiedades de conducción electrónica  

Microsoft Academic Search

En este artículo se revisa los principales modelos teóricos, que pretenden dar una explicación sobre las propiedades de con- ducción electrónica de óxidos cerámicos con estructura perovskita, que incluyen en la posición B metales de transición del primer período (Fe, Co, Ni, Mn), en conexión con su estructura de bandas y el carácter de sus electrones más externos, así como



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

PubMed Central

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

Kim, K J; Dejoy, S Q



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


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

Kim, K J; Dejoy, S Q



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


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

Yoder, Christi A; Miller, Lowell A



ConMap: Investigating new computer-based approaches to assessing conceptual knowledge structure in physics  

NASA Astrophysics Data System (ADS)

There is a growing consensus among educational researchers that traditional problem-based assessments are not effective tools for diagnosing a student's knowledge state and for guiding pedagogical intervention, and that new tools grounded in the results of cognitive science research are needed. The ConMap (``Conceptual Mapping'') project, described in this dissertation, proposed and investigated some novel methods for assessing the conceptual knowledge structure of physics students. A set of brief computer-administered tasks for eliciting students' conceptual associations was designed. The basic approach of the tasks was to elicit spontaneous term associations from subjects by presenting them with a prompt term, or problem, or topic area, and having them type a set of response terms. Each response was recorded along with the time spent thinking of and typing it. Several studies were conducted in which data was collected on introductory physics students' performance on the tasks. A detailed statistical description of the data was compiled. Phenomenological characterization of the data (description and statistical summary of observed patterns) provided insight into the way students respond to the tasks, and discovered some notable features to guide modeling efforts. Possible correlations were investigated, some among different aspects of the ConMap data, others between aspects of the data and students' in-course exam scores. Several correlations were found which suggest that the ConMap tasks can successfully reveal information about students' knowledge structuring and level of expertise. Similarity was observed between data from one of the tasks and results from a traditional concept map task. Two rudimentary quantitative models for the temporal aspects of student performance on one of the tasks were constructed, one based on random probability distributions and the other on a detailed deterministic representation of conceptual knowledge structure. Both models were reasonably successful at approximating the statistical behavior of a typical student's data.

Beatty, Ian D.



Nitrogen-detected CAN and CON experiments as alternative experiments for main chain NMR resonance assignments  

PubMed Central

Heteronuclear direct-detection experiments, which utilize the slower relaxation properties of low ? nuclei, such as 13C have recently been proposed for sequence-specific assignment and structural analyses of large, unstructured, and/or paramagnetic proteins. Here we present two novel 15N direct-detection experiments. The CAN experiment sequentially connects amide 15N resonances using 13C? chemical shift matching, and the CON experiment connects the preceding 13C? nuclei. When starting from the same carbon polarization, the intensities of nitrogen signals detected in the CAN or CON experiments would be expected four times lower than those of carbon resonances observed in the corresponding 13C-detecting experiment, NCA-DIPAP or NCO-IPAP (Bermel et al. 2006b; Takeuchi et al. 2008). However, the disadvantage due to the lower ? is counteracted by the slower 15N transverse relaxation during detection, the possibility for more efficient decoupling in both dimensions, and relaxation optimized properties of the pulse sequences. As a result, the median S/N in the 15N observe CAN experiment is 16% higher than in the 13C observe NCA-DIPAP experiment. In addition, significantly higher sensitivity was observed for those residues that are hard to detect in the NCA-DIPAP experiment, such as Gly, Ser and residues with high-field C? resonances. Both CAN and CON experiments are able to detect Pro resonances that would not be observed in conventional proton-detected experiments. In addition, those experiments are free from problems of incomplete deuterium-to-proton back exchange in amide positions of perdeuterated proteins expressed in D2O. Thus, these features and the superior resolution of 15N-detected experiments provide an attractive alternative for main chain assignments. The experiments are demonstrated with the small model protein GB1 at conditions simulating a 150 kDa protein, and the 52 kDa glutathione S-transferase dimer, GST.

Takeuchi, Koh; Heffron, Gregory; Sun, Zhen-Yu J.; Frueh, Dominique P.



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


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

Simons, P



Cámara CCD Directa con el Telescopio de 2.15 m del CASLEO: algunos diagnósticos  

NASA Astrophysics Data System (ADS)

Se efectuaron algunas pruebas con la cámara CCD (+ Reductor Focal) instalada en el foco Cassegrain del Telescopio de 2.15 m del Complejo Astronómico El Leoncito (CASLEO). Las conclusiones más significativas son: Los tiempos de exposición efectivos difieren de los nominales en una fracción apreciable de segundo. En exposiciones de menos de 3 segundos, la iluminación no es pareja en todo el detector. En consecuencia, se recomiendan los pasos a seguir por los astrónomos tanto durante la observación como en la reducción de sus datos.

Cellone, S. A.


An aggregation of pro and con evidence for medical decision support systems.  


One promising way to increase the classification accuracy of medical decision support systems is to implement heuristic combinations of pattern recognition and artificial intelligence tools. A parallel between "cognition" model and differential diagnostic task is sketched accentuating the aggregation of activating and restraining inputs and corresponding PRO and CON evidence in medicine. On the basis of this paradigm a trainable model of a fuzzy neuron is proposed which resembles some elements from the physician's decision process. An example from aviation medicine is presented which demonstrates the enhanced performance. PMID:8306621

Kuncheva, L



Un estudio financiado por los Institutos Nacionales de la Salud (NIH) muestra reducción en la mortalidad entre hombres con cáncer de próstata en grado intermedio:

Terapia hormonal por corto tiempo administrada en combinación con radioterapia a hombres con cáncer de próstata en estadio inicial aumentó sus posibilidades de vivir más en comparación con tratamiento de radioterapia sola, según un estudio clínico patrocinado por el NCI. Los beneficios del tratamiento combinado se limitaron principalmente a pacientes con enfermedad de riesgo intermedio y no se observaron en hombres con cáncer de próstata de riesgo bajo, indican los investigadores.


Quick fix or long-term cure? Pros and cons of bariatric surgery  

PubMed Central

The past decade has seen an enormous increase in the number of bariatric, or weight loss, operations performed. This trend is likely to continue, mirroring the epidemic of obesity around the world and its rising prevalence among children. Bariatric surgery is considered by many to be the most effective treatment for obesity in terms of maintenance of long-term weight loss and improvement in obesity-related comorbid conditions. Although overly simplified, the primary mechanisms of the surgical interventions currently utilized to treat obesity are the creation of a restrictive or malabsorptive bowel anatomy. Operations based on these mechanisms include the laparoscopic adjustable gastric band and laparoscopic vertical sleeve gastrectomy (considered primarily restrictive operations), the laparoscopic biliopancreatic diversion with or without a duodenal switch (primarily malabsorptive operation), and the laparoscopic Roux-en-Y gastric bypass (considered a combination restrictive and selective malabsorptive procedure). Each operation has pros and cons. Important considerations, for the patient and surgeon alike, in the decision to proceed with bariatric surgery include the technical aspects of the operation, postoperative complications including long-term nutritional problems, magnitude of initial and sustained weight loss desired, and correction of obesity-related comorbidities. Herein, the pros and cons of the contemporary laparoscopic bariatric operations are reviewed and ongoing controversies relating to bariatric surgery are discussed: appropriate patient selection, appropriate operation selection for an individual patient, surgeon selection, and how to measure success after surgery.

Madura, James A.



Preparation of stimulus responsive multiple emulsions by membrane emulsification using con a as biochemical sensor.  


In this work, a novel strategy for the controlled fabrication of biomolecular stimulus responsive water-in-oil-in-water (W/O/W) multiple emulsion using the membrane emulsification process was investigated. The emulsions interface was functionalized with a biomolecule able to function as a receptor for a target compound. The interaction between the biomolecular receptor and target stimulus activated the release of bioactive molecules contained within the structured emulsion. A glucose sensitive emulsion was investigated as a model study case. Concanavalin A (Con A) was used as the biomolecular glucose sensor. Various physicochemical strategies for stimulus responsive materials formulation are available in literature, but the preparation of biomolecule-responsive emulsions has been explored for the first time in this paper. The development of novel drug delivery systems requires advanced and highly precise techniques to obtain their particular properties and targeting requirements. The present study has proven the flexibility and suitability of membrane emulsification for the preparation of stable and functional multiple emulsions containing Con A as interfacial biomolecular receptor able to activate the release of a bioactive molecule as a consequence of interaction with the glucose target molecule. The influence of emulsion interfacial composition and membrane emulsification operating conditions on droplets stability and functional properties have been investigated. The release of the bioactive molecule as a function of glucose stimulus and its concentration has been demonstrated. PMID:21404264

Piacentini, Emma; Drioli, Enrico; Giorno, Lidietta



[AnaConDa as last resort treatment. Case report of a chronic obstructive pulmonary disease].  


Treatment of patients suffering from decompensated chronic pulmonary disease (COPD) not responding to pharmacological therapy is still a major challenge in intensive care medicine. Administration of volatile anaesthetics may be a therapy of last resort in these cases. We report on a 65-year-old woman suffering from exacerbated COPD, who could not be sufficiently ventilated despite comprehensive pharmacological therapy. In order to administer a volatile anaesthetic in the ICU, we employed the "Anaesthetic Conserving Device" (AnaConDa) consisting of a vaporizer chamber embedded in a charcoal filter system. With this device, every standard intensive care ventilator can be used to deliver volatile anaesthetics in a safe and economic manner. The AnaConDa converts the open breathing system of the intensive care ventilator into a de facto half-closed system. The very low pulmonary compliance of the patient increased dramatically after administration of 0.75 vol% halothane for 48 h (27 vs. 150 ml/mbar). Elimination of CO(2) was improved and weaning from controlled ventilation was achieved. After surgical removal of a pulmonary abscess and a total of 78 days of intensive care therapy, the patient was discharged in good health. PMID:17375268

Nickel, E A; Benken, I; Bartels, U; Voelckel, W G; Quintel, M



Field performance of the RespiCon for size-selective sampling of industrial wood processing dust.  


The RespiCon sampler is a multistage virtual impactor that simultaneously collects the ISO/CEN/ACGIH size fractions of inhalable, thoracic, and respirable particulate matter. The field performance of the device for measurement of industrial wood processing dust was evaluated against reference size-selective samplers: the IOM sampler (inhalable dust), the GK 2.69 cyclone (thoracic dust), and the SKC aluminum cyclone (respirable dust). Seventy-one sets of area samples were collected from 10 wood processing plants, with the samplers mounted either in the free-field or on a two-dimensional bluff body. The geometric mean (range) dust levels across all plants measured by the reference samplers were: inhalable, 1.35 mg/ m3 (0.11-11.06); thoracic, 0.31 mg/m3 (0.05-1.38); and respirable, 0.10 mg/m3 (0.02-0.54). In comparing the RespiCon with the reference samplers, there was no significant difference between sampling in the free-field versus bluff-body modes. For inhalable dust, there was no significant difference between the RespiCon and the IOM sampler after applying a correction factor of 1.5 to the extrathoracic data obtained from the RespiCon. Without the correction factor, the RespiCon undersample inhalable dust by an average of 23%. For thoracic dust, the RespiCon was shown to oversample the extrathoracic dust fraction resulting in an overall error of 48%. A simple correction based on the inhalable and thoracic dust levels reported by the RespiCon is proposed. For respirable dust, there was a significant difference between the RespiCon and the SKC cyclone, but the data were equivocal due to imprecision in measurement of the low respirable dust concentrations encountered and the likelihood of bias in the reference sampler. Overall, the RespiCon sampler appears to be a suitable size-selective sampling device for industrial wood processing dust, although adjustments should be made to the inhalable and thoracic dust results. PMID:15788383

Rando, Roy; Poovey, Halet; Mokadam, Dinkar; Brisolara, Joseph; Glindmeyer, Henry



A con-focal setup for micro-XRF experiments using diamond anvil cells  

NASA Astrophysics Data System (ADS)

In this contribution we introduce an experimental setup to perform con-focal micro X-ray fluorescence measurements in situ in samples at high temperatures and pressures in diamond anvil cells (DAC) (e.g. Schmidt et al. 2007). The con-focal arrangement is used to suppress the background in X-ray fluorescence (XRF) spectra that stems from elastic and inelastic scattering of the diamond anvils. The setup is based on a focusing optic in the incident beam that reaches a spot of 5-10 ?m and a focusing poly-capillary in front of an energy-dispersive solid-state detector. The detector poly-capillary is designed to work at a very long working distance of 50 mm in order to collect the radiation from the center of the DAC at 90° to the incident beam. The probing volume is defined by the two foci and has a size of ca. 300 ?m at 8 keV and 150 ?m at 19 keV as measured by scans through thin metal foils. Comparison of XRF spectra acquired with a usual detector collimator and spectra recorded with the detector capillary shows a strong suppression of XRF signal generated outside the probed volume, i.e. XRF from the gasket material and signal from elastic and Compton scattering by the diamond anvils. The ratio of the Zr K-alpha fluorescence peak to the peak of the Compton scattering changes from 0.5 (collimator) to 1.26 (detector capillary) for a ca. 1000 ppm Zr standard solution and an incident beam energy of 20 keV. For a standard solution containing ca. 1000 ppm Hf, the ratio of the L-alpha to the Compton signal increases to 6 using the detector capillary and an incident beam energy of 9.7 keV. Thus, the con-focal setup substantially improves the fluorescence to background ratio. This will result in higher sensitivities for dilute elements in the sample chamber of the DAC. Furthermore, the possibilities of interference of the sample's signal with signal from the sample environment are greatly reduced. In a broader sense, the setup can also be applied to other confined samples that require long working distances. Schmidt et al. (2007) Lithos 95, 87-102

Wilke, Max; Rickers, Karen; Vincze, Laszlo; Schmidt, Christian; Borchert, Manuela; Pascarelli, Sakura



Multi-wall carbon nanotube-polyaniline biosensor based on lectin-carbohydrate affinity for ultrasensitive detection of Con A.  


In this paper, a novel method for detecting concanavalin A (Con A) was developed based on lectin-carbohydrate biospecific interactions. Multi-wall carbon nanotube-polyaniline (MWNT-PANI) nanocomposites, synthesized by in situ polymerization, were chosen to immobilize d-glucose through the Schiff-base reaction. The immobilized D-glucose showed high binding sensitivity and excellent selectivity to its target lectin, Con A. Cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), transmission electron microscopy (TEM) and atomic force microscopy (AFM) were applied to characterize the assembly process of the modified electrode. Due to the high affinity of Con A for D-glucose and high stability of the propounded sensing platform, the fabricated biosensor achieved ultrasensitive detection of Con A with good sensitivity, acceptable reproducibility and stability. The changes of response current were proportional to the Con A concentrations from 3.3 pM to 9.3 nM, with a detection limit of 1.0 pM. Therefore, the combination of MWNT-PANI nanocomposites and the special binding force between lectin and carbohydrate provides an efficient and promising platform for the fabrication of bioelectrochemical devices. PMID:22387041

Hu, Fangxin; Chen, Shihong; Wang, Chengyan; Yuan, Ruo; Xiang, Yun; Wang, Cun



Methane activation by cobalt cluster cations, Con+ (n=2-16): Reaction mechanisms and thermochemistry of cluster-CHx (x=0-3) complexes  

NASA Astrophysics Data System (ADS)

The kinetic energy dependences of the reactions of Con+ (n=2-16) with CD4 are studied in a guided ion beam tandem mass spectrometer over the energy range of 0-10 eV. The main products are hydride formation, ConD+, dehydrogenation to form ConCD2+, and double dehydrogenation yielding ConC+. These primary products decompose to form secondary and higher order products, ConCD+, Con-1D+, Con-1C+, Con-1CD+, and Con-1CD2+ at higher energies. Adduct formation of ConCD4+ is also observed for the largest cluster cations, n>=10. In general, the efficiencies of the single and double dehydrogenation processes increase with cluster size, although the hexamer cation shows a reduced reactivity compared to its neighbors. All reactions exhibit thresholds, and cross sections for the various primary and secondary reactions are analyzed to yield reaction thresholds from which bond energies for cobalt cluster cations to D, C, CD, CD2, and CD3 are determined. The relative magnitudes of these bond energies are consistent with simple bond order considerations. Bond energies for larger clusters rapidly reach relatively constant values, which are used to estimate the chemisorption energies of the C, CD, CD2, and CD3 molecular fragments to cobalt surfaces.

Citir, Murat; Liu, Fuyi; Armentrout, P. B.



Pro-Con Debate: Etomidate or Ketamine for Rapid Sequence Intubation in Pediatric Patients  

PubMed Central

When caring for critically ill children, airway management remains a primary determinant of the eventual outcome. Airway control with endotracheal intubation is frequently necessary. Rapid sequence intubation (RSI) is generally used in emergency airway management to protect the airway from passive regurgitation of gastric contents. Along with a rapid acting neuromuscular blocking agent, sedation is an essential element of RSI. A significant safety concern regarding sedatives is the risk of hypotension and cardiovascular collapse, especially in critically ill patients or those with pre-existing comorbid conditions. Ketamine and etomidate, both of which provide effective sedation with limited effects on hemodynamic function, have become increasingly popular as induction agents for RSI. However, experience and clinical investigations have raised safety concerns associated with both etomidate and ketamine. Using a pro-con debate style, the following manuscript discusses the use of ketamine versus etomidate in RSI.

Scherzer, Daniel; Leder, Mark; Tobias, Joseph D.



Intramolecular Hydrogen Bond in Alkoxyamines. Influence on the C-ON Bond Homolysis.  


The C-ON bond homolysis in alkoxyamines can be influenced by the presence of an intramolecular hydrogen bond (IHB) between the alkyl and the nitroxyl fragments, which leads to an 8-fold decrease in the homolysis rate constant kd. When the IHB is disrupted by the solvent or by substitution of the hydrogen involved in the IHB by a protecting group (OMe, OAc, OBz, OBn, or OTBDMS), a higher homolysis rate constant kd is observed, as expected from the correlations developed by Marque ( Bertin , D. ; Gigmes , D. ; Marque , S. ; Tordo , P. Macromolecules 2005 , 38 , 2638 - 2650 ). Results were confirmed by DFT calculations at the B3LYP/6-31G(d,p) level. PMID:24070391

Brémond, Paul; Butscher, Teddy; Roubaud, Valérie; Siri, Didier; Viel, Stéphane



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


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

Evanoff, Thomas V; Krebs, William K



Direct activation of murine resting T cells by con A or anti-CD3 Ig.  


The induction of antigen-specific T cell activation is highly dependent on accessory cells (AC) which present processed antigenic fragments associated with MHC molecules and provide costimulatory signals for T cells. Antigen-specific T cell activation requires cross-linking of the TCR and the reception of one or more nonantigen-specific signals which eventually lead to T cell activation and proliferation. This sequence of events can be mimicked by lectins, bacterial enterotoxins, and anti-TCR antibodies in conjunction with APC or the combination of phorbol esters and Ca ionophores. Although the combination of PMA + Ca ionophore and certain types of T-T interactions result in APC independent T cell activation, it is generally assumed that physiologic T cell activation requires APC. The seemingly direct activation of T cells by other T cells is rather surprising in view of the known APC dependence of antigen, lectin and anti-TCR mediated T cell activation. It is conceivable that T cell mediated T cell activation is due to "cryptic" APC contamination because the total absence of APC is difficult to disprove. In reality, neither total depletion nor residual contamination with APC can be proven or disproven experimentally. Thus it can be legitimately argued that both APC dependent and independent T cell activation occur, albeit under different experimental conditions. For instance, it is possible that APC independent activation of T cells by lectins and anti-TCR antibodies would require high concentrations of activators to overide their dependence on APC. It is also conceivable and, in our opinion quite likely, that once activated, T cells could propagate T cell activation through T-T interactions. In this report we test two hypotheses: (1) The triggering of resting T cells leading to autocrine cell proliferation depends entirely on cross-linking TCR molecules, and (2) The presence of activated T cells facilitates TCR mediated activation of resting T cells without the participation of conventional APC. We present evidence that highly purified, small resting T cells can be reproducibly activated with high doses of ConA, plastic bound anti-CD3 mab and its F(ab')2 fragments. This APC independent response results in blastic transformation, expression of the IL2 Receptor, the secretion of IL2 and significant proliferation of both CD4+ and CD8+ murine T cells. These observations demonstrate that vigorous cross-linking of TCRs by anti-CD3 mab and, presumably ConA, is sufficient to induce T cell activation and autocrine (IL2 driven) proliferation.(ABSTRACT TRUNCATED AT 400 WORDS) PMID:2532886

Quintáns, J; Yokoyama, A; Evavold, B; Hirsch, R; Mayforth, R D



Contaminantes atmosféricos y su correlación con infecciones agudas de las vías respiratorias en niños de Guadalajara, Jalisco  

Microsoft Academic Search

Objective: To describe the correlation between the con- centration levels of atmospheric air pollutants and the num- ber of medical visits to IMSS, ISSSTE and of SSJ healthcare facilities of the Urban Area of Guadalajara between 2000- 2002 by children under five years suffering from acute res- piratory infections. Material and Methods: An ecological study was performed to describe the

Hermes Ulises Ramírez-Sánchez; María Dolores Andrade-García; Miguel Ernesto González-Castañeda; Alfredo de Jesús Celis-de la Rosa



Con-A-CNT (Carbon Nanotube) Conjugate with Short Wave Near-Infrared (SWIR) Laser Ablation for Tumor Therapy.  

National Technical Information Service (NTIS)

Using the characteristics of T cell mitogen called lectin protein from the jack-bean Canavalia ensiformis Concanavalin A (Con-A) with dual activities, cytotoxicity and immunomodulation, we have shown it has a therapeutic effect on hepatoma. Injection of C...

C. Peng H. Lei H. Szu M. Tang



The pros and cons of distant pedicled flaps for upper extremity trauma reconstruction in the era of microvascular surgery  

Microsoft Academic Search

Nineteen distant pedicled flaps, performed during 1989 for posttraumatic upper extremity soft tissue defect cover were reviewed. The pros and cons of distant pedicled flaps were examined with respect to the alternative treatment; namely, free microvascular tissue transfer. The main points considered were the traumatic defect, the donor site and particular problems of each patient. The conclusion was that pedicled

P. Graft; H. U. Steinau; G. Ingianni; E. Biemer



Considerazioni sulla proprieta' insulino-legante del siero del soggetto normale e del diabetico mai trattato con insulina  

Microsoft Academic Search

Riassunto Gli AA. rilevano che i sieri dell'individuo normale e del diabetico mai trattato con insulina sono provvisti di proprietà insulino-legante di entità analoga. In alcuni sieri, sia del soggetto normale che del diabetico, è presente un'attività insulino-legante superiore ai valori massimi normali, che diminuisce dopo aggiunta di µU 500 di insulina bovina.

Michele Lunetta; Giuseppe Calcagno; Luciano Motta; Turiddu Lombardo



Treatment of plutonium contaminated soil/sediment from the Mound site using the ACT*DE*CON{sup SM} process  

SciTech Connect

The removal and/or treatment of contaminated soil is a major problem facing the US DOE. The EG&G Mound Applied Technologies site in Miamisburg, Ohio, has an estimated 1.5 million cubic feet of soils from past disposal and waste burial practices awaiting remediation from plutonium contamination. This amount includes sediment from the Miami-Erie Canal that was contaminated in 1969 following a pipe- rupture accident. Conventional soil washing techniques that use particle separation would generate too large a waste volume to be economically feasible. Therefore, innovative technologies are needed for the cleanup. The ACT*DE*CON process was developed by SELENTEC for washing soils to selectively dissolve and remove heavy metals and radionuclides. ACT*DE*CON chemically dissolves and removes heavy metals and radionuclides from soils and sediments into an aqueous medium. The ACT*DE*CON process uses oxidative carbonate/chelant chemistry to dissolve the contaminant from the sediment and hold the contaminant in solution. The objective of recent work was to document the proves conditions necessary to achieve the Mound-site and regulatory-cleanup goals using the ACT*DE*CON technology.

Negri, M.C. [Argonne National Lab., IL (United States); Swift, N.A. [SELENTEC, Atlanta, GA (United States); North, J.P. [Rust Remedial Service, Inc., Anderson, SC (United States)



Juvenile Survival and Development in Euseius Finlandicus, Typhlodromus Pyri and Kampimodromus Aberrans (Acari: Phytoseiidae) Feeding on Con and Heterospecific Immatures  

Microsoft Academic Search

Juvenile survival and development in Euseius finlandicus (Oudemans), Typhlodromus pyri Scheuten and Kampimodromus aberrans (Oudemans) feeding on con- and heterospecific phytoseiid immatures were investigated in the laboratory at 25 ± 1 °C and 65 ± 5% RH. More than 50% of T. pyri protonymphs preying on larvae of K. aberrans or E. finlandicus reached the adult stage. The mean developmental

Peter Schausberger



Mecanismos psicofisiológicos implicados en la regulación afectiva y la restricción alimentaria de mujeres con riesgo de padecer bulimia nerviosa  

Microsoft Academic Search

El objetivo del estudio fue conocer el efecto de visualizar imágenes de comida bajo diferentes estados de ánimo y diferentes condiciones de restricción alimentaria en la modulación emocional de dos refle- jos defensivos (sobresalto motor y defensa cardiaca). 72 mujeres con riesgo de padecer bulimia ner- viosa fueron asignadas a dos grupos: 1) un grupo al que se inducía un

Sonia Rodríguez; José Luis Mata; Silvia Moreno; Jaime Vila




Microsoft Academic Search

El objeto del presente estudio es evaluar las diferencias en el gasto energético en la práctica de actividad física durante la jornada escolar y durante los fines de semana, y su relación con la autoestima en chicas adolescentes. Participaron 175 chicas entre 11 y 16 años, que cumplimentaron la Escala de Autoestima de Rosenberg, la Escala de Habilidad Física Percibida

Molinero González; Martínez García; Martín Ardura; M. Bragança; Salguero del Valle; Márquez Rosa


Present-day stress and pore pressure fields in the Cuu Long and Nam Con Son Basins, offshore Vietnam  

Microsoft Academic Search

Knowledge of the in situ, or contemporary stress field is vital for planning optimum orientations of deviated and horizontal wells, reservoir characterization and a better understanding of geodynamic processes and their effects on basin evolution.This study provides the first documented analysis of in situ stress and pore pressure fields in the sedimentary formations of the Cuu Long and Nam Con

Nguyen Thi Thanh Binh; Tomochika Tokunaga; Hoang Phuoc Son; Mai Van Binh



The use of the Pros and Cons of Anorexia Nervosa (P-CAN) Scale with children and adolescents  

Microsoft Academic Search

Objective: The Pros and Cons of Anorexia Nervosa (P-CAN) Scale was developed out of a previous qualitative study [Int J Eat Disord 25 (1999) 177] in which the positive and negative aspects of anorexia nervosa (AN) were elicited from individuals with AN. Principal components analysis was then used in an adult sample to reduce the number of items and to

Lucy Serpell; Marc Neiderman; Emma Haworth; Francesca Emmanueli; Bryan Lask



Strains arising by seismic events in the SIRGAS-CON network region  

NASA Astrophysics Data System (ADS)

In this study, we investigate surface strains related to seismic events and their relationship with pre- and post-seismic events in Latin America, by analyzing the variation of estimated earth coordinates supplied by a geodetic network called SIRGAS-CON. Based on data provided by the USGS for the period 2000-2011, and after the Global Congruency test, we selected four events associated with unstable geodetic network points. The resulting strains were estimated based on the finite element method using networks of points considered unstable connected to neighboring points using the Delaunay triangulation. It was possible to determine the strains along with the resulting guidelines for pre- and post-seismic, considering each triangular lattice formed for analysis as a homogeneous solid body. The calculation of strains and verification of the results allowed to analyze the interactions between lithospheric plates from the contraction and extension directions between points located in different plates. Despite the association between seismic events and the strain of geodetic network, some events of magnitude greater than 5.8 Mw were excluded because it does not show (provide) 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.

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



Long-Acting Injectable Antipsychotics for First-Episode Schizophrenia: The Pros and Cons  

PubMed Central

Clinical and psychosocial deterioration associated with schizophrenia occurs within the first few years following the onset of the illness. Therefore, to improve the long-term prognosis, it is important to provide schizophrenia patients with intensive treatment following their first episode. Relapse is highly associated with partial medication adherence or nonadherence in patients with first-episode schizophrenia. Recent studies suggest that long-acting injectable (LAI) antipsychotics compared with oral antipsychotics are more effective for medication adherence and relapse prevention. Moreover, some clinical guidelines for the treatment of schizophrenia suggested that LAI antipsychotics should be considered when patients are nonadherent “at any stage.” Decreased compliance is a common cause of relapse during the initial stages of the disease. Therefore, LAI antipsychotics should be highly considered when treating patients with first-episode schizophrenia. In the present paper, clinical trial data and current guidelines on the use of LAI antipsychotics for first-episode schizophrenia are discussed as well as the pros and cons of this treatment option.

Kim, Borah; Lee, Sang-Hyuk; Yang, Yen Kuang; Park, Jong-Il; Chung, Young-Chul



Pro con debate: the use of regional vs systemic analgesia for neonatal surgery.  


In recent years the inclusion of regional techniques to pediatric anesthesia has transformed practice. Simple procedures such as caudal anesthesia with local anaesthetics can reduce the amounts of general anesthesia required and provide complete analgesia in the postoperative period while avoiding large amounts of opioid analgesia with potential side effects that can impair recovery. However, the application of central blocks (epidural and spinal local anesthesia) via catheters in the younger infant, neonate and even preterm neonate remains more controversial. The potential for such invasive maneuvers themselves to augment risk, can be argued to outweigh the benefits, others would argue that epidural analgesia can reduce the need for postoperative ventilation and that this not only facilitates surgery when intensive care facilities are limited, but also reduces cost in terms of PICU stay and recovery profile. Currently, opinions are divided and strongly held with some major units adopting this approach widely and others maintaining a more conservative stance to anesthesia for major neonatal surgery. In this pro-con debate the evidence base is examined, supplemented with expert opinion to try to provide a balanced overall view. PMID:21722227

Bösenberg, Adrian T; Jöhr, Martin; Wolf, Andrew R



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


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

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



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


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

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



Stable and Metastable Phase Equilibria in the Bi 2 O 3 –BiPO 4 System  

Microsoft Academic Search

The stable and metastable phase equilibria in the Bi2O3–P2O5 system were studied in the range 0–50 mol % P2O5 by differential thermal analysis and x-ray diffraction. The results were used to construct the corresponding phase diagrams. In the equilibrium state, the system contains one sillenite phase with Bi2O3 : P2O5 = 12 : 1 and four other bismuth phosphates (2

V. P. Zhereb; Yu. F. Kargin; L. A. Zhereb; V. A. Mironova; V. M. Skorikov




Microsoft Academic Search

. La fotocorriente inducida por iluminación pulsada, de un capacitor MOS con compuerta de Mo, provisto de ventana óptica, se emplea como monitor de su estado de carga, frente a estímulos químicos con concentraciones crecientes de H2 en N2 de hasta 1000 ppm. Se describen las respuestas inducidas por transporte a la interfaz metal-dieléctrico. Los resultados confirman que la sensibilidad

R. M. Lombardi; R. Aragón



Microsoft Academic Search

Introducción El consumo de productos alimentarios en España se ha modificado notablemente en las últimas décadas. Con datos de la Organización de las Naciones Unidas para la Agricultura y la Alimentación (FAO), los niveles de consumo de energía en España son similares al promedio de los países desarrollados (3.470 calorías), pero los niveles de consumo de proteína y de grasa

José María García Álvarez-Coque; Teresa López-García Usach


Do Patient-perceived Pros and Cons of Opioids Predict Sustained Higher-Dose Use?  


OBJECTIVES:: Chronic opioid therapy (COT) is associated with various adverse outcomes, especially at higher doses, yet little is known about predictors of sustained higher-dose COT. This study aimed to ascertain, among higher-dose COT patients, the association of patient-perceived pros and cons of opioids with continued higher-dose use 1 year later. METHODS:: Patients (N=1229) in 2 large health plans prescribed ?50 mg morphine-equivalent dose (MED) per day for chronic noncancer pain completed a survey assessing opioid benefits and harms. The Prescribed Opioid Difficulties Scale questionnaire assessed psychosocial problems, concerns, benefits, and side effects related to opioid use. Logistic regression models estimated the associations of the reported benefits and problems with higher-dose continuation (?50 mg MED/d) versus dose reduction (<50 mg MED/d) 1 year later. RESULTS:: Over 80% of participants continued higher-dose opioid use at 1 year, regardless of reported problems, concerns, side effects, pain reduction, or perceived helpfulness. Higher scores on the Prescribed Opioid Difficulties Scale Problems subscale (odds ratio=0.79, 95% confidence interval, 0.68-0.92) and Concerns subscale (odds ratio=0.76, 95% confidence interval, 0.65-0.90) were negatively associated with higher-dose use 1 year later. Other baseline measures (opioid helpfulness, reduction in pain, number of side effects, and side effect bothersomeness) were not significantly associated with continued higher-dose use. DISCUSSION:: The large majority of patients continued using higher-dose opioids regardless of baseline characteristics. These findings suggest the difficulty of reducing opioid dose among chronic higher-dose opioid users. PMID:23535150

Thielke, Stephen M; Turner, Judith A; Shortreed, Susan M; Saunders, Kathleen; Leresche, Linda; Campbell, Cynthia I; Weisner, Constance C; Korff, Michael Von



Strain rate of the South American lithospheric plate by SIRGAS-CON geodetic observations  

NASA Astrophysics Data System (ADS)

A multiyear solution of the SIRGAS-CON network was used to estimate the strain rates of the earth surface from the changing directions of the velocity vectors of 140 geodetic points located in the South American plate. The strain rate was determined by the finite element method using Delaunay triangulation points that formed sub-networks; each sub-network was considered a solid and homogeneous body. The results showed that strain rates vary along the South American plate and are more significant on the western portion of the plate, as expected, since this region is close to the subduction zone of the Nazca plate beneath the South American plate. After using Euler vectors to infer Nazca plate movement and to orient the velocity vectors of the South American plate, it was possible to estimate the convergence and accommodation rates of the Nazca and South American plates, respectively. Strain rate estimates permitted determination of predominant contraction and/or extension regions and to establish that contraction regions coincide with locations with most of the high magnitude seismic events. Some areas with extension and contraction strains were found to the east within the stable South American plate, which may result from different stresses associated with different geological characteristics. These results suggest that major movements detected on the surface near the Nazca plate occur in regions with more heterogeneous geological structures and multiple rupture events. Most seismic events in the South American plate are concentrated in areas with predominant contraction strain rates oriented northeast-southwest; 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.

Marotta, Giuliano Sant'Anna; França, George Sand; Galera Monico, João Francisco; Fuck, Reinhardt Adolfo; Oswaldo de Araújo Filho, José



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

PubMed Central

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

Epstein, Nancy E.



Plasmonic tunable glucose sensing based on the dissociation of Con A-aggregated dextran-coated gold colloids  

NASA Astrophysics Data System (ADS)

We have recently developed a new approach to glucose sensing based on the aggregation of nanometer-sized noble-metal nanoparticles and their respective change in plasmon absorption upon glucose addition. High molecular weight Dextran coated nanoparticles are aggregated with Concanavalin A, (Con A), where the aggregation results in a significant shift in metal-plasmon absorption. The addition of glucose competitively binds to Con A, reducing nanoparticle aggregation, and therefore the plasmon absorption when monitored at 650 nm. We have optimized our plasmonic glucose sensing mechanism with regard to nanoparticle stability, the dynamic range for glucose sensing and the wavelength of observation, to be compatible with both clinical glucose requirements and measurements.

Geddes, Chris D.; Aslan, Kadir; Zhang, Jian; Lakowicz, Joseph R.



Structural analysis of ConBr reveals molecular correlation between the carbohydrate recognition domain and endothelial NO synthase activation.  


Diocleinae lectins are highly homologous in their primary structure which features metal binding sites and a carbohydrate recognition domain (CRD). Differences in the biological activity of legume lectins have been widely investigated using hemagglutination inhibition assays, isothermal titration microcalorimetry and co-crystallization with mono- and oligosaccharides. Here we report a new lectin crystal structure (ConBr) extracted from seeds of Canavalia brasiliensis, predict dimannoside binding by docking, identify the ?-aminobutyric acid (Abu) binding pocket and compare the CRD of ConBr to that of homologous lectins. Based on the hypothesis that the carbohydrate affinity of lectins depends on CRD configuration, the relationship between tridimensional structure and endothelial NO synthase activation was used to clarify differences in biological activity. Our study established a correlation between the position of CRD amino acid side chains and the stimulation of NO release from endothelium. PMID:21530490

Bezerra, Eduardo Henrique Salviano; Rocha, Bruno Anderson Matias; Nagano, Celso Shiniti; Bezerra, Gustavo de Arruda; Moura, Tales Rocha de; Bezerra, Maria Júlia Barbosa; Benevides, Raquel Guimarães; Sampaio, Alexandre Holanda; Assreuy, Ana Maria Sampaio; Delatorre, Plínio; Cavada, Benildo Sousa



Long-Term Efficacy and Reproductive Behavior Associated with GonaCon ? Use in White-Tailed Deer (Odocoileus virginianus )  

Microsoft Academic Search

GonaCon ? is a single-shot immunocontraceptive vaccine that targets the reproductive hormone gonadotropin releasing hormone (GnRH). The GnRH peptide used in the vaccine is secreted by the hypothalamus of the brain and is specifically known as luteinizing hormone releasing hormone. This peptide stimulates the synthesis and secretion of luteiniz- ing hormone and follicle stimulating hormone by the anterior pituitary gland.

Gary Killian


Comparison of four probabilistic models (CARES(®), Calendex™, ConsExpo, and SHEDS) to estimate aggregate residential exposures to pesticides.  


Two deterministic models (US EPA's Office of Pesticide Programs Residential Standard Operating Procedures (OPP Residential SOPs) and Draft Protocol for Measuring Children's Non-Occupational Exposure to Pesticides by all Relevant Pathways (Draft Protocol)) and four probabilistic models (CARES(®), Calendex™, ConsExpo, and SHEDS) were used to estimate aggregate residential exposures to pesticides. The route-specific exposure estimates for young children (2-5 years) generated by each model were compared to evaluate data inputs, algorithms, and underlying assumptions. Three indoor exposure scenarios were considered: crack and crevice, fogger, and flying insect killer. Dermal exposure estimates from the OPP Residential SOPs and the Draft Protocol were 4.75 and 2.37?mg/kg/day (crack and crevice scenario) and 0.73 and 0.36?mg/kg/day (fogger), respectively. The dermal exposure estimates (99th percentile) for the crack and crevice scenario were 16.52, 12.82, 3.57, and 3.30?mg/kg/day for CARES, Calendex, SHEDS, and ConsExpo, respectively. Dermal exposure estimates for the fogger scenario from CARES and Calendex (1.50 and 1.47?mg/kg/day, respectively) were slightly higher than those from SHEDS and ConsExpo (0.74 and 0.55?mg/kg/day, respectively). The ConsExpo derived non-dietary ingestion estimates (99th percentile) under these two scenarios were higher than those from SHEDS, CARES, and Calendex. All models produced extremely low exposure estimates for the flying insect killer scenario. Using similar data inputs, the model estimates by route for these scenarios were consistent and comparable. Most of the models predicted exposures within a factor of 5 at the 50th and 99th percentiles. The differences identified are explained by activity assumptions, input distributions, and exposure algorithms. PMID:22781436

Young, Bruce M; Tulve, Nicolle S; Egeghy, Peter P; Driver, Jeffrey H; Zartarian, Valerie G; Johnston, Jason E; Delmaar, Christiaan J E; Evans, Jeffrey J; Smith, Luther A; Glen, Graham; Lunchick, Curt; Ross, John H; Xue, Jianping; Barnekow, David E



The politics of energy: Case study of Con Edison's nuclear complex at Indian Point, New York. Working paper  

Microsoft Academic Search

The possible impact of areawide residential location policy on future residential electricity usage in the Tri-State Metropolitan Region centering on New York City is investigated. This paper focuses on the politics of energy in its discussion of Con Edison's Nuclear Complex at Indian Point. The first period of planning (1954 to the late 60's) comprised a relatively closed decision-making process

J. Aron; K. Seelman



Evaluating the decisional balance construct of the Transtheoretical Model: are two dimensions of pros and cons really enough?  

Microsoft Academic Search

Objectives  The Transtheoretical Model of behavior change (TTM) postulates that behavior change is a process involving progress through\\u000a five distinct stages of change (SOC). One of the key components for progress to a later stage is decisional balance (pros\\u000a and cons of changing to the target behavior). The goal of the present study is to test the two dimensions of decisional

Chantal Kroll; Roger Keller; Urte Scholz; Sonja Perren



Mitochondria-Dependent Apoptosis of Con A-Activated T Lymphocytes Induced by Asiatic Acid for Preventing Murine Fulminant Hepatitis  

PubMed Central

Selectively facilitating apoptosis of activated T cells is essential for the clearance of pathogenic injurious cells and subsequent efficient resolution of inflammation. However, few chemicals have been reported to trigger apoptosis of activated T cells for the treatment of hepatitis without affecting quiescent T cells. In the present study, we found that asiatic acid, a natural triterpenoid, selectively triggered apoptosis of concanavalin A (Con A)-activated T cells in a mitochondria-dependent manner indicated by the disruption of the mitochondrial transmembrane potential, release of cytochrome c from mitochondria to cytosol, caspases activation, and cleavage of PARP. In addition, asiatic acid also induced the cleavage of caspase 8 and Bid and augmented Fas expression in Con A-activated T cells. However, following activation of T cells from MRLlpr/lpr mice with mutation of Fas demonstrated a similar susceptibility to asiatic acid-induced apoptosis compared with normal T cells, suggesting that Fas-mediated death-receptor apoptotic pathway does not mainly contribute to asiatic acid-induced cell death. Furthermore, asiatic acid significantly alleviated Con A-induced T cell-dependent fulminant hepatitis in mice, as assessed by reduced serum transaminases, pro-inflammatory cytokines, and pathologic parameters. Consistent with the in vitro results, asiatic acid also induced apoptosis of activated CD4+ T cells in vivo. Taken together, our results demonstrated that the ability of asiatic acid to induce apoptosis of activated T cells and its potential use in the treatment of T-cell-mediated inflammatory diseases.

Guo, Wenjie; Liu, Wen; Hong, Shaocheng; Liu, Hailiang; Qian, Cheng; Shen, Yan; Wu, Xuefeng; Sun, Yang; Xu, Qiang



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

SciTech Connect

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.

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



Calcium balance in haemodialysis--do not lower the dialysate calcium concentration too much (con part).  


The debate on the most adequate dialysate calcium concentration for intermittent haemodialysis therapy is ongoing. There is probably no one optimal concentration. In general, one would like to maintain a neutral calcium balance in adult haemodialysis patients. However, a slightly negative balance may be preferable to avoid soft-tissue calcium accumulation in face of net calcium loss from the bone with ageing. The problem with measurements of calcium balance is that they are generally imprecise, as are estimations of total body calcium and its distribution in various compartments, unless done with labour-intensive methods and great care. The choice of the dialysate calcium will depend on several factors, including parathyroid and vitamin D status, type and severity of concomitant bone disease, presence or absence of arterial calcification, dietary habits, drug treatment and dialysis modality. Ideally the dialysate calcium would be adapted to each patient's needs. This is not feasible, however, in most dialysis settings and neither is it cost-effective. From a practical point of view, a relatively high dialysate calcium concentration in the range of of 1.50-1.75 mmol/L (3.0-3.5 mEq/L) should probably be preferred in haemodialysis patients with high serum PTH levels who are not prescribed calcium-based phosphate binders or high doses of active vitamin D sterols, and in those who are receiving a calcimimetic. In those who are treated with high doses of calcium-based binders and/or active vitamin D derivatives or who have a very low serum PTH level, the optimal dialysate calcium concentration is probably lower, in the range of 1.25-1.50 mmol/L (2.50-3.0 mEq/L). In the present pro/con debate about the optimal dialysate calcium concentration used for the haemodialysis session, we have accepted to defend the viewpoint that a low calcium concentration may do more harm than benefit in many patients. This viewpoint is opposite to that taken by Gotch. He argues that since calcitriol and other active vitamin D derivatives have become available virtually all haemodialysis patients are in positive calcium balance. We would like to take issue with this statement and warn against the indiscriminate use of a low calcium dialysate in all patients receiving haemodialysis therapy. PMID:19666667

Drüeke, Tilman B; Touam, Malik



Use of colloidal gold and ruthenium red in stereo high-voltage electron microscopic study of Con A-binding sites in mouse macrophages  

Microsoft Academic Search

Concanavalin A (Con A)-binding sites were labeled with colloidal gold (CG), stained with ruthenium red, and observed under a high-voltage electron microscope. Mouse peritoneal macrophages were labeled by the indirect Con A\\/CG labeling method at 0° C. After washing, some of the cells were incubated in phosphate-buffered saline (PBS) at 37° C. The specimens were then stained with ruthenium red,

K. Takata; T. Arii; S. Yamagishi; H. Hirano



Lectin from Canavalia brasiliensis seeds (ConBr) is a valuable biotechnological tool to stimulate the growth of Rhizobium tropici in vitro.  


To study the interactions between a Rhizobium tropici strain and lectins isolated from the seeds of Canavalia ensiformis (ConA) and Canavalia brasiliensis (ConBr), a lectin fluorescence assay was performed. In addition, an experiment was designed to evaluate the effect of the two lectins on bacterial growth. Both lectins were found to bind to R. tropici cells, but the interactions were inhibited by D-mannose. Interestingly, only ConBr stimulated bacterial growth in proportion to the concentrations used (15.6-500 ?g/mL), and the bacterial growth stimulation was inhibited by D-mannose as well. Structure/Function analyses by bioinformatics were carried out to evaluate the volume and carbohydrate recognition domain (CRD) configuration of ConA and ConBr. The difference of spatial arrangement and volume of CRD may indicate the variation between biological activities of both lectins. The results suggest that ConBr could be a promising tool for studies focusing on the interactions between rhizobia and host plants. PMID:22565477

de Vasconcelos, Mayron Alves; Cunha, Claudio Oliveira; Arruda, Francisco Vassiliepe Sousa; Carneiro, Victor Alves; Mercante, Fabio Martins; do Nascimento Neto, Luiz Gonzaga; de Sousa, Giselly Soares; Rocha, Bruno Anderson Matias; Teixeira, Edson Holanda; Cavada, Benildo Sousa; dos Santos, Ricardo Pires



CONS-COCOMAPS: a novel tool to measure and visualize the conservation of inter-residue contacts in multiple docking solutions  

PubMed Central

Background The development of accurate protein-protein docking programs is making this kind of simulations an effective tool to predict the 3D structure and the surface of interaction between the molecular partners in macromolecular complexes. However, correctly scoring multiple docking solutions is still an open problem. As a consequence, the accurate and tedious screening of many docking models is usually required in the analysis step. Methods All the programs under CONS-COCOMAPS have been written in python, taking advantage of python libraries such as SciPy and Matplotlib. CONS-COCOMAPS is freely available as a web tool at the URL: Results Here we presented CONS-COCOMAPS, a novel tool to easily measure and visualize the consensus in multiple docking solutions. CONS-COCOMAPS uses the conservation of inter-residue contacts as an estimate of the similarity between different docking solutions. To visualize the conservation, CONS-COCOMAPS uses intermolecular contact maps. Conclusions The application of CONS-COCOMAPS to test-cases taken from recent CAPRI rounds has shown that it is very efficient in highlighting even a very weak consensus that often is biologically meaningful.



Co-adsorptions of CO/N2O, NO/NH3, CO2/N2 and conversion of CO/N2O to CO2/N2 on ZnO graphene-like nanosheet  

NASA Astrophysics Data System (ADS)

Adsorption energies of CO, CO2, N2O, N2, NO, NH3 and CO/N2O, NO/NH3 and CO2/N2 co-adsorptions on the ZnO graphene-like nanosheet (ZnOGLNS) were obtained using DFT calculations. The energies and thermodynamic properties for conversion of CO + N2O to CO2 + N2 over the ZnOGLNS, its equilibrium constant and adsorption coefficients are reported. The activation energy for the conversion reaction of CO + N2O to CO2 + N2 over the ZnOGLNS of 42.30 kcal/mol was obtained. The CO + N2O to CO2 + N2 conversion over the ZnOGLNS is the energetically and thermodynamically preferred reaction.

Kaewruksa, Benjawan; Wanbayor, Raina; Ruangpornvisuti, Vithaya



[Intracranial hypertension related to sedation with sevoflurane using the AnaConDa(®) device in a patient with severe traumatic brain injury].  


Sedation in neurocritical patients remains a challenge as there is no drug that meets all the requirements. Since the appearance of the AnaConDa(®) device, and according to the latest recommendations, sevoflurane has become an alternative for patients with brain injury. The use of AnaConDa(®) produces an increase in the anatomical dead space that leads to a decrease in alveolar ventilation. If the decrease in the alveolar ventilation is not offset by an increase in minute volume, there will be an increase in PaCO2. We report the case of a patient with severe traumatic brain injury who suffered an increase in intracranial pressure as a result of increased PaCO2 after starting sedation with the AnaConDa(®) device. PMID:22920835

Ferrando, C; Carbonell, J A; Aguilar, G; Badenes, R; Belda, F J



Lectin from Canavalia brasiliensis (ConBr) protects hippocampal slices against glutamate neurotoxicity in a manner dependent of PI3K/Akt pathway.  


The excitotoxicity induced by excessive activation of the glutamatergic neurotransmission pathway is involved in several neuropathologies. In this sense, molecules that prevent the release of glutamate or the excessive activation of its receptors can be useful in preventing the neuronal cell death observed in these diseases. Lectins are proteins capable of reversible binding to the carbohydrates in glycoconjugates, and some have been used in the study and purification of glutamate receptors. ConBr is a mannose/glucose-binding lectin purified from Canavalia brasiliensis seeds. In the present study, we aimed to evaluate the neuroprotective activity of ConBr against glutamate-induced excitotoxicity. Hippocampal slices were isolated from adult male mice and incubated for 6h in Krebs saline/DMEM buffer alone (control), in the presence of glutamate or glutamate plus ConBr. The phosphorylation of Akt and mitogen activated protein kinases (MAPKs) such as ERK1/2, p38(MAPK) and JNK1/2/3 was evaluated with western blotting. The results indicate that glutamate provoked a reduction in the hippocampal slice viability (-25%), diminished the phosphorylation of Akt and augmented p38(MAPK) and ERK1 phosphorylation. No changes were observed in the phosphorylation of JNK1/2/3 or ERK2. Notably, ConBr, through a mechanism dependent on carbohydrate interaction, prevented the reduction of cell viability and Akt phosphorylation induced by glutamate. Furthermore, in the presence of the PI3K inhibitor LY294002, ConBr was unable to reverse glutamate neurotoxicity. Taken together, our data suggest that the neuroprotective effect of ConBr against glutamate neurotoxicity requires oligosaccharide interaction and is dependent on the PI3K/Akt pathway. PMID:23454192

Jacques, Amanda V; Rieger, Débora K; Maestri, Mariana; Lopes, Mark W; Peres, Tanara V; Gonçalves, Filipe M; Pedro, Daniela Z; Tasca, Carla I; López, Manuela G; Egea, Javier; Nascimento, Kyria S; Cavada, Benildo S; Leal, Rodrigo B



Preventive effects of 1,25-(OH)2VD3 against ConA-induced mouse hepatitis through promoting vitamin D receptor gene expression  

Microsoft Academic Search

Aim:To investigate the immunosuppressive effects of 1,25-dihydroxyvitamin D3 (1,25-(OH)2VD3) on concanavalin A (ConA)-induced hepatitis and elucidate the action mechanism.Methods:Female BALB\\/C mice were intravenously administered ConA (20 mg\\/kg) to induce acute immunological liver injury. Liver damage was evaluated in respect to serum alanine transaminase (ALT) level and liver histological changes. The proliferation of splenocytes was measured by using [3H]-thymidine incorporation. The

Xu-dong Hu; Shi-li Jiang; Cheng-hai Liu; Yi-yang Hu; Cheng Liu; Ming-yu Sun; Gao-feng Chen; Ping Liu



Crystal structure of [Co(N 2 C 2 H 8 ) 3 ] [AuBr 4 ] 2 Br bis (tetrabromoaurate(III)) tris (ethylenediamine) cobalt(III) bromide  

Microsoft Academic Search

A double complex salt [Co(N2C2H8)3][AuBr4]2Br is obtained and characterized using single crystal X-ray diffraction analysis. The crystallographic data of C6H24Au2Br9CoN6 are as follows: a = 21.6479(17) Å, b = 14.9085(12) Å, c = 8.2676(7) Å, ? = 110.820(2)°, V = 1538.92(12) Å3, C2\\/c space group, Z = 4, d\\u000a x = 3.602 g\\/cm3. Square planar coordination of the gold atom

I. A. Baidina; E. V. Makotchenko



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.  


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

Dinakaran, Paul M; Kalainathan, S



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  

NASA Astrophysics Data System (ADS)

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 mm3) 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 1H 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).

Dinakaran, Paul M.; Kalainathan, S.




Microsoft Academic Search

La selección recurrente para aptitud combinatoria en cultivos autógamos (SRAC), aunque exitosa, enfrenta dificultades para ha- cer las cruzas y para obtener suficiente semilla de éstas. Además, las derivaciones de la respuesta a la SRAC (R) basadas en el mode- lo de dos alelos pueden no ser adecuadas si la población se formó con más de dos progenitores. El objetivo

Jaime Sahagún-Castellanos; Autónoma Chapingo



An Exploratory Study of the W3C Mailing List Test Collection for Retrieval of Emails with Pro\\/Con Argument  

Microsoft Academic Search

The W3C mailing list test collection, an information re- trieval test collection for email, was developed for the TREC Enterprise Search track in 2005. One task in that track was to retrieve emails that contribute at least one pro\\/con related to a specific topic. This paper describes the test collection and presents a preliminary evaluation of its suit- ability for

Yejun Wu; Douglas W. Oard; Ian Soboroff



High mobility group box chromosomal protein 1 in acute-on-chronic liver failure patients and mice with ConA-induced acute liver injury.  


High mobility group box chromosomal protein 1 (HMGB1) is an important proinflammatory molecule in many inflammatory disorders, but little is known about its role in acute-on-chronic liver failure (ACLF). Here, we investigated the relationship between the expression of HMGB1 and the disease onset and severity of ACLF patients and mice with acute liver injury/failure induced by concanavalin A (ConA). Peripheral blood mononuclear cells (PBMCs) and serum from ACLF patients were collected, and a mouse model of acute liver injury/failure was induced by ConA. HMGB1 mRNA expression in patient PBMCs or in murine livers and serum HMGB1 protein in ACLF patients and mice were assayed by RT-PCR and Western blotting, respectively. HMGB1 translocation in hepatocytes of ConA-treated mice was assessed by immunohistochemical staining. Up-regulated HMGB1 mRNA levels in PBMCs and accumulated protein in serum were both correlated with disease severity in ACLF patients. In the animal model, HMGB1 levels increased at 4 h and reached its peak value at 8-12 h after challenge with ConA, which suggests that HMGB1 is a relatively late proinflammatory cytokine compared with TNF-?. Translocation of HMGB1 from the nucleus to the cytoplasm in hepatocytes was correlated with the severity of liver injury in mice. While specific anti-HMGB1 antibodies and nicotine protected mice from acute liver injury/failure by reducing mortality and improving liver tissue injury, treatment with recombinant HMGB1 led to an increased mortality due to ConA challenge. Thus, the data from the present study suggest that HMGB1 plays a critical role in the systemic inflammation of ACLF and could be a potential therapeutic target in the treatment of ACLF. PMID:22609241

Zhou, Rong-Rong; Liu, Hong-Bo; Peng, Jian-Ping; Huang, Yan; Li, Ning; Xiao, Mei-Fang; Wang, Haichao; Fan, Xue-Gong



Use of a GnRH vaccine, GonaCon, for prevention and treatment of adrenocortical disease (ACD) in domestic ferrets.  


Adrenocortical disease (ACD) is a common problem in surgically sterilized, middle-aged to old ferrets (Mustela putorius furo). The adrenal tissues of these ferrets develop hyperplasia, adenomas, or adenocarcinomas, which produce steroid hormones including estradiol, 17-hydroxyprogesterone, and androstenedione. Major clinical signs attributable to overproduction of these hormones are alopecia (hair loss) in both sexes and a swollen vulva in females. Pruritus, muscle atrophy, hind limb weakness, and sexual activity or aggression are also observed in both sexes. Males can develop prostatic cysts, prostatitis, and urethral obstruction. ACD is thought to be linked to continuous and increased LH secretion, due to lack of gonadal hormone feedback in neutered ferrets. This continuous elevated LH acts on adrenal cortex LH receptors, resulting in adrenal hyperplasia or adrenal tumor. This study investigated whether the immunocontraceptive vaccine GonaCon, a GnRH vaccine developed to reduce the fertility of wildlife species and the spread of disease, could prevent or delay onset of ACD and treat alopecia in ferrets with existing ACD. Results showed that GonaCon provided relief from ACD by causing production of antibodies to GnRH, probably suppressing production and/or release of LH. Treatment caused many ACD symptoms to disappear, allowing the ferrets to return to a normal life. The study also found that the probability of developing ACD was significantly reduced in ferrets treated with GonaCon when young (1-3 years old) compared to untreated control animals. GonaCon caused injection site reaction in some animals when administered as an intramuscular injection but caused few side effects when administered subcutaneously. Both intramuscular and subcutaneous vaccination resulted in similar levels of GnRH antibody titers. Subcutaneous vaccination with GonaCon is thus recommended to prevent the onset of ACD and as a possible treatment for ACD-signs in domestic ferrets. PMID:23906891

Miller, Lowell A; Fagerstone, Kathleen A; Wagner, Robert A; Finkler, Mark



Tissue factor expression in ovarian cancer: implications for immunotherapy with hI-con1, a factor VII-IgGFc chimeric protein targeting tissue factor  

PubMed Central

We evaluated the expression of tissue factor (TF) in ovarian cancer (EOC) and the potential of hI-con1, an antibody-like molecule targeting TF, as a novel form of therapy against chemotherapy-resistant ovarian disease. We studied the expression of TF in 88 EOC by immunohistochemistry (IHC) and real-time-PCR (qRT-PCR) and the levels of membrane-bound-complement-regulatory-proteins CD46, CD55 and CD59 in primary EOC cell lines by flow-cytometry. Sensitivity to hI-con1-dependent-cell-mediated-cytotoxicity (IDCC), complement-dependent-cell-cytotoxicity and inhibition of IDCC by ?-immunoglobulin were evaluated in 5-h 51chromium-release-assays. Cytoplasmic and/or membrane TF expression was observed in 24 out of 25 (96%) of the EOC samples tested by IHC, but not in normal ovarian-tissue. EOC with clear cell histology significantly overexpress TF when compared to serous, endometrioid, or undifferentiated tumors by qRT-PCR. With a single exception, all primary EOC that overexpressed TF demonstrated high levels of CD46, CD55 and CD59 and regardless of their histology or resistance to chemotherapy, were highly sensitive to IDCC. The effect of complement and physiologic doses of ?-immunoglobulin on IDCC in ovarian cancer cell lines overexpressing TF was tumor specific and related to the overexpression of CD59 on tumor cells. Small-interfering-RNA-mediated knockdown of CD59 expression in ovarian tumors significantly increased hI-con1-mediated cytotoxic activity in vitro. Finally, low doses of interleukin-2 further increased the cytotoxic effect induced by hI-con1 (P < 0.01). hI-con1 molecule induces strong cytotoxicity against primary chemotherapy-resistant ovarian cancer cell lines overexpressing TF and may represent a novel therapeutic agent for the treatment of ovarian tumors refractory to standard treatment modalities.

Cocco, Emiliano; Varughese, Joyce; Buza, Natalia; Bellone, Stefania; Lin, Ken-Yu; Bellone, Marta; Todeschini, Paola; Silasi, Dan-Arin; Azodi, Masoud; Schwartz, Peter E.; Rutherford, Thomas J.; Carrara, Luisa; Tassi, Renata; Pecorelli, Sergio; Lockwood, Charles J.



Tissue factor expression in ovarian cancer: implications for immunotherapy with hI-con1, a factor VII-IgGF(c) chimeric protein targeting tissue factor.  


We evaluated the expression of tissue factor (TF) in ovarian cancer (EOC) and the potential of hI-con1, an antibody-like molecule targeting TF, as a novel form of therapy against chemotherapy-resistant ovarian disease. We studied the expression of TF in 88 EOC by immunohistochemistry (IHC) and real-time-PCR (qRT-PCR) and the levels of membrane-bound-complement-regulatory-proteins CD46, CD55 and CD59 in primary EOC cell lines by flow-cytometry. Sensitivity to hI-con1-dependent-cell-mediated-cytotoxicity (IDCC), complement-dependent-cell-cytotoxicity and inhibition of IDCC by ?-immunoglobulin were evaluated in 5-h (51)chromium-release-assays. Cytoplasmic and/or membrane TF expression was observed in 24 out of 25 (96%) of the EOC samples tested by IHC, but not in normal ovarian-tissue. EOC with clear cell histology significantly overexpress TF when compared to serous, endometrioid, or undifferentiated tumors by qRT-PCR. With a single exception, all primary EOC that overexpressed TF demonstrated high levels of CD46, CD55 and CD59 and regardless of their histology or resistance to chemotherapy, were highly sensitive to IDCC. The effect of complement and physiologic doses of ?-immunoglobulin on IDCC in ovarian cancer cell lines overexpressing TF was tumor specific and related to the overexpression of CD59 on tumor cells. Small-interfering-RNA-mediated knockdown of CD59 expression in ovarian tumors significantly increased hI-con1-mediated cytotoxic activity in vitro. Finally, low doses of interleukin-2 further increased the cytotoxic effect induced by hI-con1 (P < 0.01). hI-con1 molecule induces strong cytotoxicity against primary chemotherapy-resistant ovarian cancer cell lines overexpressing TF and may represent a novel therapeutic agent for the treatment of ovarian tumors refractory to standard treatment modalities. PMID:21725665

Cocco, Emiliano; Varughese, Joyce; Buza, Natalia; Bellone, Stefania; Lin, Ken-Yu; Bellone, Marta; Todeschini, Paola; Silasi, Dan-Arin; Azodi, Masoud; Schwartz, Peter E; Rutherford, Thomas J; Carrara, Luisa; Tassi, Renata; Pecorelli, Sergio; Lockwood, Charles J; Santin, Alessandro D



Virgin Caenorhabditis remanei females are attracted to a coital pheromone released by con-specific copulating males  

PubMed Central

The gonochoristic soil nematode Caenorhabditis remanei strictly requires copulation for species propagation. Males of this species are sexually promiscuous with females of other species; therefore, we asked in this study whether virgin C. remanei females display evidence of mate choice. We digitally recorded and measured the locomotor behaviors of one or more virgin females in the presence of a single male on a 5 mm diameter mating lawn. We observed that initially only the male modifies his locomotor trajectory to another animal on the mating lawn; the virgin females showed no locomotor bias toward the mate-searching male. However, once a male started to copulate, females in the vicinity altered their movement trajectories toward the copulating couple. Newly inseminated females are refractive to the coital signal, but partially regain their attraction to copulating males after 24 h. We found only copulating males with an intact gonad can attract females, and that the coital signal can be broadcasted at least 1.5 mm through the air. Unlike males, which are also attracted to hetero-specific females, virgin C. remanei females will only crawl toward a copulating con-specific male. We suggest that Caenorhabditis females use the coital signal as a pheromone to identify a vigorous male of their own species.

Markert, Mathew; Garcia, Luis Rene



Document-level classification of CT pulmonary angiography reports based on an extension of the ConText algorithm.  


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

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



Status and Progress of a Fault Current Limiting Hts Cable to BE Installed in the con EDISON Grid  

NASA Astrophysics Data System (ADS)

In the last decade, significant advances in the performance of second generation (2G) high temperature superconducting wire have made it suitable for commercially viable applications such as electric power cables and fault current limiters. Currently, the U.S. Department of Homeland Security is co-funding the design, development and demonstration of an inherently fault current limiting HTS cable under the Hydra project with American Superconductor and Consolidated Edison. The cable will be approximately 300 m long and is being designed to carry 96 MVA at a distribution level voltage of 13.8 kV. The underground cable will be installed and energized in New York City. The project is led by American Superconductor teamed with Con Edison, Ultera (Southwire and nkt cables joint venture), and Air Liquide. This paper describes the general goals, design criteria, status and progress of the project. Fault current limiting has already been demonstrated in 3 m prototype cables, and test results on a 25 m three-phase cable will be presented. An overview of the concept of a fault current limiting cable and the system advantages of this unique type of cable will be described.

Maguire, J.; Folts, D.; Yuan, J.; Henderson, N.; Lindsay, D.; Knoll, D.; Rey, C.; Duckworth, R.; Gouge, M.; Wolff, Z.; Kurtz, S.



Virgin Caenorhabditis remanei females are attracted to a coital pheromone released by con-specific copulating males.  


The gonochoristic soil nematode Caenorhabditis remanei strictly requires copulation for species propagation. Males of this species are sexually promiscuous with females of other species; therefore, we asked in this study whether virgin C. remanei females display evidence of mate choice. We digitally recorded and measured the locomotor behaviors of one or more virgin females in the presence of a single male on a 5 mm diameter mating lawn. We observed that initially only the male modifies his locomotor trajectory to another animal on the mating lawn; the virgin females showed no locomotor bias toward the mate-searching male. However, once a male started to copulate, females in the vicinity altered their movement trajectories toward the copulating couple. Newly inseminated females are refractive to the coital signal, but partially regain their attraction to copulating males after 24 h. We found only copulating males with an intact gonad can attract females, and that the coital signal can be broadcasted at least 1.5 mm through the air. Unlike males, which are also attracted to hetero-specific females, virgin C. remanei females will only crawl toward a copulating con-specific male. We suggest that Caenorhabditis females use the coital signal as a pheromone to identify a vigorous male of their own species. PMID:24058874

Markert, Mathew; García, Luis René



Pro/con clinical debate: The use of prone positioning in the management of patients with acute respiratory distress syndrome  

PubMed Central

Critical care medicine is a relatively new specialty and as such there is not a great deal of accumulated data to allow clinicians to practice 'evidence-based medicine' in all situations they encounter. When evidence does exist, intensivists may choose not to follow it based on 'gut feelings' or their own interpretation of how the data apply to their patient. It is perhaps not surprising that these latter events occur given that intensivists are often literally fighting for their patient's lives. Prone positioning evokes a large emotional response from many intensivists. Despite accumulating data there appears to be two camps of clinicians: those who strongly believe in the therapy, and those who want more data. The emotion and rationale for the mindset of the two camps is evident in this issue of Critical Care Forum. With compelling arguments on both sides of the fence, it is apparent that this debate is far from over. The authors of this pro/con debate, which is based on a clinical scenario, first describe their position and then respond to their opponent's position.

Marini, John J; Rubenfeld, Gordon



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


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

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



Trattamento ortopedico con corsetto  

Microsoft Academic Search

\\u000a Abstract  Conservative treatment of scoliosis by orthopaedic brace has an indication in cases of moderate or mild scoliosis. Its efficacy\\u000a is demonstrated through the experience of several orthopaedic schools. The indication to adopt an orthopaedic brace is given\\u000a by: curve degrees and its correggibility, skeletal age of patients and cosmetical aspect. The choice of the appropriate brace\\u000a depends on kind and

D. Peroni; F. Spreafico; W. Albisetti



urban ConAgraculture  

Microsoft Academic Search

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

Dale J Luebbert



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

PubMed Central

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.

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



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


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

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



Preliminary experience with a 'sub-50' combined oral contraceptive, containing 35 micrograms ethinyl oestradiol and 1 mg norethisterone ('NeoCon').  


The present trend in oral contraception is clearly in favour of the 'sub-50' pills, taking into consideration the recent publications on the association between cardiovascular affections and pill intake. 'NeoCon', a combination pill containing 1 mg norethisterone and 35 micrograms ethinyl oestradiol, has been investigated in the United States, Mexico, Germany, Belgium and the United Kingdom. From all these studies, it could be concluded that it is an effective and well-tolerated oral contraceptive. From the present series, totalling 104 patients with 1232 cycles, first clinical impressions confirm the evaluations of other investigators: no pregnancies, only mild cycle disturbances disappearing after a few adaptation cycles, few side-effects and excellent tolerance. Due to the low potency and the low contents of its components, it is suggested that 'NeoCon' is appropriate for all women in general and for the younger women in particular. PMID:7433480

Schellen, A M



Canadian Shield brine from the Con Mine, Yellowknife, NT, Canada: Noble gas evidence for an evaporated Palaeozoic seawater origin mixed with glacial meltwater and Holocene recharge  

Microsoft Academic Search

Dissolved noble gas concentrations were measured in high salinity (270g\\/L) Ca(Na)-Cl groundwaters from the Con Mine, Yellowknife, Canada in an effort to discriminate between two possible origins, as either a brine generated by evaporative enrichment in a Paleozoic inland sea, or marine water concentrated by freezing during glacial times. Major ion and isotope geochemistry indicate that brines from the deepest

Shane Greene; Nick Battye; Ian Clark; Tom Kotzer; Dennis Bottomley



An appraisal of a column-generation-based algorithm for a centralized train-con?ict resolution on metropolitan railway network  

Microsoft Academic Search

In practice, a train-con?ict resolution is decentralized around the dispatchers each of whom, with her rule-of-thumb to operational data, controls a few segments from a global railway network. Conceptually, a global sub-optimality or infeasibility of the decentralized system is resolved by a network controller on the top of the lower layers of the dispatchers and the drivers operating trains on

Sung-Pil Hong; Yun-Hong Min; Soon-Heum Hong


Dissection of the Intracellular Pathways in Hepatocytes Suggests a Role for Jun Kinase and IFN Regulatory Factor1 in Con A-Induced Liver Failure1  

Microsoft Academic Search

Con A administration results in dose-dependent immune-mediated liver injury. Cytokines are important to determine the outcome of liver failure in this model, and especially TNF-a and IFN-g directly contribute to hepatocyte damage. The intracellular pathways of these two cytokines, which eventually result in tissue destruction, are not well defined. Here we used anti-IFN-g Abs and adenoviral vectors that express molecules

Konrad Streetz; Bastian Fregien; Jorg Plumpe; Kerstin Korber; Stefan Kubicka; Stephan C. Bischoff; Michael P. Manns; Gisa Tiegs; Christian Trautwein


A review of the practice of sedation with inhalational anaesthetics in the intensive care unit with the AnaConDa(®) device.  


The intensive care unit (ICU) environment is often perceived to be hostile and frightening by patients due to unfamiliar surroundings coupled with presence of numerous personnel, monitors and other equipments as well as a loss of perception of time. Mechanical ventilation and multiple painful procedures that often need to be carried out in these critically ill patients add to their overall anxiety. Sedation is therefore required not only to allay the stress and anxiety, but also to allow for mechanical ventilation and other invasive therapeutic and diagnostic procedures to be performed. The conventional intravenous sedative agents used in ICUs suffer from problems of over sedation, tachyphylaxis, drug accumulation, organ specific elimination and often lead to patient agitation on withdrawal. All this tend to prolong the ventilatory as well as ICU and hospital discharge time, which increase the risk for infection and add to the overall increase in morbidity, mortality and hospital costs. In 2005, the anaesthetic conserving device (AnaConDa(®)) was marketed for ICU sedation with volatile anaesthetic agents. A number of trials have shown the effectiveness of using volatile anaesthetic agents for ICU sedation with the AnaConDa device. Compared with intravenous sedatives, use of volatile anaesthetic agents have resulted in shorter wake up and extubation time, lesser duration of mechanical ventilation and faster discharge from hospitals. This review shall focus on the benefits, technical pre-requisites and status of sedation with volatile anaesthetic agents in ICUs with the AnaConDa(®) device. PMID:23325934

Misra, Satyajeet; Koshy, Thomas



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

Microsoft Academic Search

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

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



Pro/Con Forum: The MACOS Controversy. The Push for a Uniform National Curriculum [And] MACOS Revisited: A Commentary on the Most Frequently Asked Questions about "Man: A Course of Study"  

ERIC Educational Resources Information Center

|The pro/con forum presents opposing viewpoints on the controversial MACOS curriculum (Educational Development Corporation) by Peter Dow, Director of EDC and Congressman John B. Conlan, Arizona. (JR)|

Conlan, John B.; Dow, Peter B.



Theoretical Study of Magnetic Properties of VN, CrN, MnN, FeN and CoN under strain  

NASA Astrophysics Data System (ADS)

We present an ab initio tooled study on magnetic and electronic properties of 3d transition metals mononitrides under hydrostatic and biaxial strain, in wurtzite (w) and zincblende (zb) structure, and find all of them to become half-metallic (HM) under lattice expansion in the zb structure. The first compound to become HM under lattice expansion is MnN, followed by CrN, VN, FeN and CoN, with integer magnetic moments of 4, 3, 2, 5 and 6 ?B, respectively. We investigate the possibility of MBE growing of zb-CrN on cubic GaN.

Ribeiro, M.; Marques, M.; Scolfaro, L. M. R.; Teles, L. K.; Ferreira, L. G.




Microsoft Academic Search

A polymerase chain reaction (PCR) was applied to detect genetically modified (GM) maize and soybean food product, using specific 35S promoter primers for inserted chimerical genes in maize or soybean. The PCR detected food products that include ingredients obtained from GMOs in maize grains and flour, as well as processed in foods such as tortillas (Mexican crepe), corn chips, corn

A. Mendoza; S. Fernández; M. A. Cruz; M. A. Rodríguez-Perez; D. Resendez-Perez; H. A. Barrera Saldaña



Estudio de la fotoabsorción y fotoionización de la molécula de alta relevancia atmosférica no a través de los estados Rydberg con la metodología MQDO  

NASA Astrophysics Data System (ADS)

Los procesos de fotoionización son de una importancia fundamental [1] y encuentran aplicación en un gran número de contextos científicos: Astrofísica [2], química de las radiaciones, biología. Los investigadores de dichos campos, necesitan de valores de fiables de secciones eficaces para la fotoionización parcial, la Fotoabsorción, así como para los procesos de fotofragmentación en amplios intervalos espectrales, particularmente en estudios de modelización [3-5]. En este trabajo se ha centrado la atención sobre el oxido nítrico, que se ha considerado apropiado y relevante por varios motivos: por el trascendental papel que representa en la física y química de la alta atmosfera [6], aparte de por estar íntimamente relacionado con los problemas de contaminación. Los procesos de recombinación disociativa [7] del NO, donde los estados Rydberg se encuentran directamente implicados, son relevantes, por ejemplo, en las regiones E y F de la ionosfera [7]. En este trabajo se estudia la fotoionización del NO desde el estado fundamental con la versión molecular del método del orbital de defecto cuántico (MQDO). Para ello se calcula el diferencial de las fuerzas de oscilador parciales que constituyen los canales de fotoionización del NO desde el estado fundamental. La continuidad del diferencial de fuerza de oscilador calculada a través del umbral de fotoionización, esto es, en las regiones del espectro discreta y del continua, se adopta como criterio de calidad la escasez de datos comparativos [8].

Bustos, E.; Velasco, A. M.; Martín, I.; Lavín, C.


Induction of Macrophage Migration Inhibitory Factor in ConA-Stimulated Rheumatoid Arthritis Synovial Fibroblasts through the P38 MAP Kinase-Dependent Signaling Pathway  

PubMed Central

Background/Aims This study was undertaken to identify the intracellular signaling pathway involved in induction of macrophage migration inhibitory factor (MIF) in human rheumatoid arthritis (RA) synovial fibroblasts. Methods Human RA synovial fibroblasts were treated with concanavalin A (ConA), various cytokines, and inhibitors of signal transduction molecules. The production of MIF by synovial fibroblasts was measured in culture supernatants by ELISA. The expression of MIF mRNA was determined using reverse transcriptase polymerase chain reaction (RT-PCR) and real-time PCR. Phosphorylation of p38 mitogen-activated protein (MAP) kinase in synovial fibroblasts was confirmed using Western blotting. The expression of MIF and p38 MAP kinase in RA synovium was determined using dual immunohistochemistry. Results The production of MIF by RA synovial fibroblasts increased in a dose-dependent manner after ConA stimulation. MIF was also induced by interferon-?, CD40 ligand, interleukin-15, interleukin-1?, tumor necrosis factor-?, and transforming growth factor-?. The production of MIF by RA synovial fibroblasts was significantly reduced after inhibition of p38 MAP kinase. The expression of MIF and p38 MAP kinase was upregulated in the RA synovium compared with the osteoarthritis synovium. Conclusions These results suggest that MIF production was induced through a p38 MAP-kinase-dependent pathway in RA synovial fibroblasts.

Kim, Hae-Rim; Park, Mi-Kyung; Kim, Kyoung-Woon; Oh, Hye-Joa; Park, Jin-Sil; Heo, Yang-Mi; Lee, Sang-Heon; Kim, Ho-Youn



The International Consortium on Lithium Genetics (ConLiGen): An Initiative by the NIMH and IGSLI to Study the Genetic Basis of Response to Lithium Treatment  

PubMed Central

For more than half a decade, lithium has been successfully used to treat bipolar disorder. Worldwide, it is considered the first-line mood stabilizer. Apart from its proven antimanic and prophylactic effects, considerable evidence also suggests an antisuicidal effect in affective disorders. Lithium is also effectively used to augment antidepressant drugs in the treatment of refractory major depressive episodes and prevent relapses in recurrent unipolar depression. In contrast to many psychiatric drugs, lithium has outlasted various pharmacotherapeutic ‘fashions’, and remains an indispensable element in contemporary psychopharmacology. Nevertheless, data from pharmacogenetic studies of lithium are comparatively sparse, and these studies are generally characterized by small sample sizes and varying definitions of response. Here, we present an international effort to elucidate the genetic underpinnings of lithium response in bipolar disorder. Following an initiative by the International Group for the Study of Lithium-Treated Patients ( and the Unit on the Genetic Basis of Mood and Anxiety Disorders at the National Institute of Mental Health, lithium researchers from around the world have formed the Consortium on Lithium Genetics ( to establish the largest sample to date for genome-wide studies of lithium response in bipolar disorder, currently comprising more than 1,200 patients characterized for response to lithium treatment. A stringent phenotype definition of response is one of the hallmarks of this collaboration. ConLiGen invites all lithium researchers to join its efforts.

Schulze, Thomas G.; Alda, Martin; Adli, Mazda; Akula, Nirmala; Ardau, Raffaella; Bui, Elise T.; Chillotti, Caterina; Cichon, Sven; Czerski, Piotr; Del Zompo, Maria; Detera-Wadleigh, Sevilla D.; Grof, Paul; Gruber, Oliver; Hashimoto, Ryota; Hauser, Joanna; Hoban, Rebecca; Iwata, Nakao; Kassem, Layla; Kato, Tadafumi; Kittel-Schneider, Sarah; Kliwicki, Sebastian; Kelsoe, John R.; Kusumi, Ichiro; Laje, Gonzalo; Leckband, Susan G.; Manchia, Mirko; MacQueen, Glenda; Masui, Takuya; Ozaki, Norio; Perlis, Roy H.; Pfennig, Andrea; Piccardi, Paola; Richardson, Sara; Rouleau, Guy; Reif, Andreas; Rybakowski, Janusz K.; Sasse, Johanna; Schumacher, Johannes; Severino, Giovanni; Smoller, Jordan W.; Squassina, Alessio; Turecki, Gustavo; Young, L. Trevor; Yoshikawa, Takeo; Bauer, Michael; McMahon, Francis J.



A wireless, remote-query and high sensitivity Escherichia coli O157: H7 biosensor based on the recognition action of Con A  

PubMed Central

Escherichia coli O157: H7 is detected using a remote-query (wireless, passive) magnetoelastic sensor platform to which a 1 µm-thick layer of Bayhydrol 110 and then a layer of functionalized mannose is applied. The multivalent binding of lectin concanavalin A (Con A) to the E. coli surface O-antigen and mannose favors the strong adhesion of E. coli to the mannose modified magnetoelastic sensor; E. coli is rigidly and strongly attached on the mannose-modified sensor through Con A, which works as a bridge to bind to the E. coli surface O-antigen and mannose modified sensor surface. As E. coli is bound to the sensor its resonance frequency shifts, enabling quantification of E. coli concentration with a limit of detection of 60 cells/mL and a linear logarithmic response range of 6.0×101 to 6.1×109 cells/mL. The analysis can be directly conducted without incubation, and completed in 3 h or less.

Lu, Qingzhu; Lin, Hailan; Ge, Shutian; Luo, Shenglian; Cai, Qingyun; Grimes, Craig A.



Influence of analogue-resistant mutants of Azotobacter chroococcum solubilizing phosphate on yield and quality of sunflower (Helianthus annuus).  


Two phosphate-solubilizing analogue-resistant mutants of Azotobacter chroococcum showed a positive interactive effect on sunflower (Helianthus annuus). Plant height, leaf area, seed mass, seed yield, protein and oil content increased significantly by inoculation with A. chroococcum mutants. Both levels of fertilizers applied (80N + 30P2O5 and 80N + 60P2O5 kg/hm2 showed increased seed yield. Likewise, inoculation resulted in a significantly higher yield. Application of P-solubilizing A. chroococcum strains with the lower fertilizer level showed no significant difference on plant growth parameters when compared with the higher fertilizer level, indicating that inoculation of P-solubilizing Azotobacter strains can reduce the necessary levels of fertilization from 60P2O5 to 30P2O5 kg/hm2. PMID:11347259

Kumar, V; Aggarwal, N K; Singh, B P



40 CFR 60.241 - Definitions.  

Code of Federal Regulations, 2013 CFR

...or equivalent or alternative methods. (c) Equivalent P 2 O5 stored means the quantity of phosphorus, expressed as phosphorus pentoxide, being cured or stored in the affected facility. (d) Fresh granular triple...



New Low-Temperature Technology of Producing Calcium Feed Phosphate with Microelements  

Microsoft Academic Search

The possibility of producing feed calcium phosphates in a way ensuring a low physical water content in the product was investigated in laboratory conditions. For this purpose the process use of a phosphoric acid solution with a higher (than in conventional methods) P2O5 content (53-63% by wt. P2O5) with CaO (molar fraction of 0.5-0.8) and CaCO3 in the phosphoric acid

Józef Hoffmann


A Comparison of Water-Soluble Fertilizer with Liquid Fertilizer for Sport-Fish Pond Fertilization  

Microsoft Academic Search

A finely pulverized, water-soluble fertilizer containing 10% N, 52% P2O5, and 4% K2O was compared with a standard liquid fertilizer (10% N, 34% P2O5, 0% K2O) in ponds containing sunfish Lepomis spp. at the Auburn University Fisheries Research Unit, Auburn, Alabama. Our study suggests that sunfish production with water-soluble fertilizer can equal standard liquid fertilizer results at about 50% of

Yancey G. Rushton; Claude E. Boyd



Preparation and Characterization of Regenerated Cellulose Fibers from a Novel Solvent System  

Microsoft Academic Search

Liquid crystalline solutions of cellulose were prepared by dissolving cellulose in the compound solvent of phosphoric acid\\/poly?phosphoric acid. Influence of P2O5 concentration in the compound solvent on solubility and dissolution behavior of cellulose was evaluated. The experiment results indicated that the P2O5 concentration could play an important role in breaking the intra? and intermolecular hydrogen bonding of cellulose and increasing

Zhenguo Li; Panpan Hu; Junrong Yu; Zuming Hu; Zhaofeng Liu



The preparation of cadmium phosphate and cadmium zinc phosphate glasses and their electrical and optical properties  

Microsoft Academic Search

The preparation of a range of glasses based on CdO-P2O5 and CdO-ZnO-P2O5 is described and data are reported on density, electrical conductivity and optical absorption. The electrical conduction is electronic rather than ionic and is due to hopping between localized states. The optical absorption is due to forbidden indirect electronic transitions.

C. A. Hogarth; M. A. Ghauri



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

Microsoft Academic Search

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



Determination of sodium tripolyphosphate in meat samples by capillary zone electrophoresis with on-line isotachophoretic sample pre-treatment  

Microsoft Academic Search

The usefulness of zone capillary electrophoresis (CZE) in combination with isotachophoresis (cITP) as on-line preconcentration technique was examined for analysis of tripolyphosphate (STPP) in meat and meat products. The mean concentrations of STPP in different types of meat products varied from 39mgP2O5\\/100g to 219mgP2O5\\/100g, these values are below the legal requirements. The detection (LOD) and quantification (LOQ) limits for STPP

A. Jastrz?bska



The Effect of Coadsorbed Water on the Stability, Con?guration and Interconversion of Formyl (HCO) and Hydroxymethylidyne (COH) on Platinum (1 1 1)  

SciTech Connect

Two forms of the methanol electro-oxidation intermediate with stoichiometry C:H:O, COH (hydroxymethylidyne) and HCO (formyl), on Pt (11 1) with and without coadsorbed water were studied using density functional theory calculations. The structure, adsorption energy and stability with respect to dissociation were calculated. Both HC=O and C–OH were stable on clean Pt (11 1) and with a single coadsorbed water molecule, while only the HCO con?guration was stable in the presence of a whole water layer. The vibrational modes of HC=O on a bridge site showed no mode around 1700 cm-1 characteristic of C=O stretch making it hard to distinguish it from C–OH.

Arnadottir, Liney; Stuve, Eric M.; Jonsson, Hannes



Broadening, shifting, and line asymmetries in the 2<--0 band of CO and CO-N2: Experimental results and theoretical calculations  

NASA Astrophysics Data System (ADS)

We have measured the room temperature, widths, pressure shifts, and line asymmetry coefficients for many transitions of the first overtone band of CO and CO perturbed by N2. The broadening coefficients were obtained with an accuracy of about 1%. The pure CO profiles have been fitted by a Voigt profile while the CO-N2 spectral profiles have been fitted with a Lorentz and an empirical line shape model (HCv) that blends together a hard collision model and a speed-dependent Lorentz profile. In addition to the Voigt, Lorentz, and HCv models, we have added a dispersion profile to account for weak line mixing. The line broadening and shift coefficients are compared to semiclassical calculations employing a variety of intermolecular interactions. The line asymmetry results are compared to line mixing calculations based on the energy corrected sudden (ECS) model. The results indicate that effects other than line mixing also contribute to the measured line asymmetry.

Predoi-Cross, Adriana; Bouanich, J. P.; Benner, D. Chris; May, A. D.; Drummond, J. R.



Hydrogen adsorption and magnetic behavior of Fen and Con clusters: Controlling the magnetic moment and anisotropy one atom at a time  

NASA Astrophysics Data System (ADS)

Theoretical studies to investigate the effect of H absorption on the magnetic moment of small Fen and Con clusters have been carried out using gradient corrected density-functional approach. Our studies on clusters containing up to four transition metal and 2 H atoms show that the successive addition of H atoms can lead to monotonic or oscillatory change from the free cluster magnetic moment. A detailed analysis of the density of electronic states shows that the variations in the magnetic moment can be related to the location of the lowest unoccupied molecular orbital in the parent cluster. It is shown that the addition of hydrogen can substantially change the magnetic anisotropy. In particular Co3H2 is shown to exhibit magnetic anisotropy that is higher than any of the known anisotropies in the molecular nanomagnets.

Jones, N. O.; Beltran, M. R.; Khanna, S. N.; Baruah, T.; Pederson, M. R.



Intracellular free zinc up-regulates IFN-? and T-bet essential for Th1 differentiation in Con-A stimulated HUT-78 cells  

PubMed Central

Zinc deficiency impairs cellular immunity. Up-regulation of mRNA levels of IFN-?, IL-12R?2, and T-bet are essential for Th1 differentiation. We hypothesized that zinc increases Th1 differentiation via up-regulation of IFN-? and T-bet expression. To test this hypothesis, we used zinc-deficient and zinc-sufficient HUT-78 cells (a Th0 cell line) under different condition of stimulation in this study. We also used TPEN, a zinc-specific chelator, to decrease the bioavailability of zinc in the cells. We measured intracellular free zinc, cytokines, and the mRNAs of T-bet, IFN-?, and IL-12R?2. In this study, we show that in zinc-sufficient HUT-78 cells (a Th0 cell line), mRNA levels of IFN-?, IL-12R?2, and T-bet in PMA/PHA-stimulated cells were increased in comparison to zinc-deficient cells. Although intracellular free zinc was increased slightly in PMA/PHA-stimulated cells, Con-A-stimulated cells in 5 ?M zinc medium showed a greater sustained increase in intracellular free zinc in comparison to cells incubated in 1 ?M zinc. The cells pre-incubated with TPEN showed decreased mRNA levels of IFN-? and T-bet mRNAs in comparison to cells without TPEN incubation. We conclude that stimulation of cells by Con-A via TCR, release intracellular free zinc which functions as a signal molecule for generation of IFN-? and T-bet, and IL-12Rb?2 mRNAs required for Th1 cell differentiation. These results suggest that zinc increase Th1 cell differentiation by up-regulation of IFN-? and T-bet, and IL-12Rb?2 mRNAs.

Bao, Bin; Prasad, Ananda S.; Beck, Frances WJ; Bao, Ginny W.; Singh, Tapinder; Ali, Shadan; Sarkar, Fazlul H.



Actitudes de madres adolescentes y adultas y su relación con la personalidad de sus hijos Attitudes of adolescent and adult mothers and their relation with their children's personality profile  

Microsoft Academic Search

La presente investigación tuvo el propósito de indagar si hay diferencias entre las actitudes de las madres adolescentes y adultas e identificar si existe una relación entre las actitudes de las madres y el perfil de personalidad de sus hijos. Participaron 35 mujeres con sus hijos, quienes cursaban el primer grado de primaria; 17 fueron madres siendo adolescentes y 18

Iris Xóchitl; Galicia Moyeda; Lucina Jiménez Vega; Susana Pavón Figueroa; Alejandra Sánchez Velasco



Liberación\\/mineralización de nitrógeno en hojarasca de Eucalyptus grandis y leguminosas herbáceas, su relación con la calidad física y química del residuo y su efecto sobre el crecimiento de plantas jóvenes de eucalipto  

Microsoft Academic Search

Resumen El tipo de cosecha y manejo de residuos inciden en el contenido de nutrientes del suelo y la productividad forestal. Estos residuos contienen la mayoría del retorno de N. La velocidad de provisión de nutrientes por la descomposición\\/mineralización puede verse afectada por la calidad química y física como por la localización y contacto de los residuos con el suelo.

Alcaraz Maria Luciana



Microsoft Academic Search

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

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


Monitoreo de ecosistemas con estrategias geoestadísticas, una aplicación de gran escala en Jalisco, México Ecosystem monitoring through the use of geostatistic strategies, a large scale application in Jalisco, Mexico  

Microsoft Academic Search

RESUMEN El proyecto de Inventario y Monitoreo de los Recursos Naturales de Jalisco, México (IMRENAT), es un proceso innovador que propone una aplicación práctica de las herramientas de modelado esta- dístico geoespacial para reportar creíblemente la condición del territorio. Aprovechando las intercone- xiones que existen entre atributos del terreno, la vegetación, las actividades humanas y lo detectable con sensores remotos

José Germán Flores Garnica; Martín Alfonso; Celedonio Aguirre Bravo


Eficacia del tratamiento con leflunomida en pacientes con artritis psoriásica  

Microsoft Academic Search

Psoriatic arthritis (PsA) occurs in 1-3% of the population and 25% of affected patients require systemic therapy. The drugs used in PsA have been developed for other diseases, mainly rheumatoid arthritis (RA), and there are no clinical trials supporting their efficacy and safety in these patients. Leflunomide (LFN) inhibits the activation and proliferation of T-lymphocytes and is considered to be

Ingrid Möller



A novel mammalian myosin I from rat with an SH3 domain localizes to Con A-inducible, F-actin-rich structures at cell-cell contacts  

PubMed Central

In an effort to determine diversity and function of mammalian myosin I molecules, we report here the cloning and characterization of myr 3 (third unconventional myosin from rat), a novel mammalian myosin I from rat tissues that is related to myosin I molecules from protozoa. Like the protozoan myosin I molecules, myr 3 consists of a myosin head domain, a single light chain binding motif, and a tail region that includes a COOH-terminal SH3 domain. However, myr 3 lacks the regulatory phosphorylation site present in the head domain of protozoan myosin I molecules. Evidence was obtained that the COOH terminus of the tail domain is involved in regulating F-actin binding activity of the NH2-terminal head domain. The light chain of myr 3 was identified as the Ca(2+)-binding protein calmodulin. Northern blot and immunoblot analyses revealed that myr 3 is expressed in many tissues and cell lines. Immunofluorescence studies with anti-myr 3 antibodies in NRK cells demonstrated that myr 3 is localized in the cytoplasm and in elongated structures at regions of cell-cell contact. These elongated structures contained F-actin and alpha-actinin but were devoid of vinculin. Incubation of NRK cells with Con A stimulated the formation of myr 3-containing structures along cell-cell contacts. These results suggest for myr 3 a function mediated by cell-cell contact.



Observations on the effects of inhaled isoflurane in long-term sedation of critically Ill children using a modified AnaConDa©-system.  


Long-term intravenous sedation may present problems due to dependence and side effects. Medical records of children who were administered isoflurane were reviewed. 15 patients (9 boys, 6 girls) with a mean age of 11.8 month (+2.4) were analysed.Analgesia and sedation was given in mean 9.7+1.1 days before commencing inhalation using a modified application device (AnaConDa©). Administration was given over a period of 7.2+1.4 days. Depth of sedation was monitored by using Comfort- and Hartwig-scores. Observations included continuous monitoring of heart-rate, pulse oxymetry, blood pressure and cerebral tissue oxygenation.Within 4 h post administration of isoflurane a satisfactory increase in the depth of sedation was seen and kept till extubation. 6/15 patients received tracheostomies during the observation period. None of the patients observed suffered life-critical events of the modified application of isoflurane proceeded without complications. Ketamine and clonidine infusion rates were significantly reduced (p<0.005) as well as the use and overall infusion rate of midazolam, ?-hydroxy butyrate, fentanyl and morphine (p<0.05).Isoflurane inhalation may provide an additional option for long-term sedation in a specific group of critically ill infants but neurodegenerative toxic effects will have to be taken into account when using volatile anesthetics at any time during infancy. PMID:23797368

Eifinger, F; Hünseler, C; Roth, B; Vierzig, A; Oberthuer, A; Mehler, K; Kribs, A; Menzel, C; Trieschmann, U



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...


Quality of life and psycho-social development in children with otitis media with effusion Qualità di vita e sviluppo psico-sociale nei bambini con otite media secretiva  

Microsoft Academic Search

th class, mostly due to persistent attention disturbances. In the State-Trait Anxiety Inventory test, 50% of parents or care- givers had a high state-anxiety score and so were mostly con- cerned with health status of the children. The State-Trait Anx- iety Inventory results indicated that 50% of parents or care- givers had a high trait-anxiety score and thus had an



Comparison between dynamic cystocolpoproctography and dynamic pelvic floor MRI: pros and cons: Which is the "functional" examination for anorectal and pelvic floor dysfunction?  


"Functional" imaging of anorectal and pelvic floor dysfunction has assumed an important role in the diagnosis and management of these disorders. Although defecography has been widely practiced for decades to evaluate the dynamics of rectal emptying, debate concerning its clinical relevance, how it should be done and interpreted continues. Due to the recognition of the association of defecatory disorders with pelvic organ prolapse in women, the need to evaluate the pelvic floor as a unit has arisen. To meet this need, defecography has been extended to include not only evaluation of defecation disorders but also the rest of the pelvic floor by opacifying the small bowel, vagina, and the urinary bladder. The term "dynamic cystocolpoproctography" (DCP) has been appropriately applied to this examination. Rectal emptying performed with DCP provides the maximum stress to the pelvic floor resulting in complete levator ani relaxation. In addition to diagnosing defecatory disorders, this method of examination demonstrates maximum pelvic organ descent and provides organ-specific quantification of organ prolapse, information that is only inferred by means of physical examination. It has been found to be of clinical value in patients with defecation disorders and the diagnosis of associated prolapse in other compartments that are frequently unrecognized by history taking and the limitations of physical examination. Pelvic floor anatomy is complex and DCP does not show the anatomical details pelvic magnetic resonance imaging (MRI) provides. Technical advances allowing acquisition of dynamic rapid MRI sequences has been applied to pelvic floor imaging. Early reports have shown that pelvic MRI may be a useful tool in pre-operative planning of these disorders and may lead to a change in surgical therapy. Predictions of hypothetical increase cancer incidence and deaths in patients exposed to radiation, the emergence of pelvic floor MRI in addition to questions relating to the clinical significance of DCP findings have added to these controversies. This review analyses the pros and cons between DCP and dynamic pelvic floor MRI, addresses imaging and interpretive controversies, and their relevance to clinical management. PMID:22446896

Maglinte, Dean D T; Hale, Douglass S; Sandrasegaran, Kumar



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

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.

Bufe, M.



Signals provided in vivo by human rIL-2 and Con A can switch hapten-specific tolerance from unresponsiveness to responsiveness in the South African clawed toad.  

PubMed Central

Injection in vivo of trinitrobenzene sulphonic acid (TNBS) will conjugate trinitrophenyl (TNP) to the cells and proteins of rodents, and induce hapten-specific tolerance to this epitope. However, the induction of hapten-specific tolerance by this method in the South African clawed toad, Xenopus laevis, is restricted to its subsequent presentation on Ficoll or polyvinylpyrrolidone (PVP). This restricted tolerance depends on the stimulation of an N-methyl-N-nitrosourea (NMU)-insensitive, cyclophosphamide (CyP)-sensitive hapten-specific (suppressor) population that is functionally demonstrable in vitro. Unresponsiveness to TNP-Ficoll can be switched to responsiveness by injection in vivo of recombinant DNA-produced human IL-2 (rIL-2) or the plant-derived lectin, concanavalin A (Con A). Responsiveness to TNP-Ficoll requires thymic presence, although thymic extracts from rIL-2- or Con A-injected toads will suffice. Unresponsiveness to TNP-PVP can also be broken by these reagents, but thymic presence is not required with this immunogen. TNP-Ficoll responses are thymus requiring, while those to TNP-PVP are not, in the toad. Since TNBS failed to stimulate hapten-specific tolerance to a secondary challenge to TNP-Ficoll, we suggest that the suppressor function involved in the establishment of the unresponsive state may act on the differentiation, rather than on the function, of the relevant B cells.

Ruben, L N; Clothier, R H; Mirchandani, M; Wood, P; Balls, M



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

NASA Astrophysics Data System (ADS)

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.

Borisov, Alexander; Behrens, Harald; Holtz, Francois



Material characterisation and cytocompatibility assessment of quinternary phosphate glasses.  


Six phosphate glass formulations (in the system P(2)O(5)-CaO-MgO-Na(2)O-Fe(2)O(3)) were produced with fixed magnesium and calcium content at 24 and 16 mol%, respectively. P(2)O(5) and Fe(2)O(3) were varied between 40-50 and 0-4 mol% respectively, with the balance being Na(2)O. EDX analyses confirmed the final composition of the glasses investigated to within a 1-2 % error margin. Thermal analyses showed a linear increase in T(g) with increasing Fe(2)O(3) and P(2)O(5) contents, with Fe(2)O(3) showing a greater effect than P(2)O(5). This was proposed to be due to the formation of Fe-O-P bonds and an increase in the cross-link density of the glass network enhancing the durability of the glass. The glasses that were investigated revealed a decrease in degradation rate with increasing Fe(2)O(3) and P(2)O(5) contents and again the effect of Fe(2)O(3) was greater. All the above characteristics correlated well with structural changes measured by IR and XPS analyses. Cytocompatibility studies showed good cellular (MG63) response to the glasses up to 168 h in terms of cell viability, proliferation and differentiation. Statistical analysis revealed that all the formulations with the exception of P50Fe4 gave a comparable response to the control (TCP), which suggested that after a threshold level of glass durability is achieved the degradation rate has no or minimal effect on biocompatibility. However, it was seen that the glass chemistry can also affect cellular response, since increasing the P(2)O(5) content promoted phenotypic expression that was not related to degradation rate but to the degradation products. This was supported using an elution assay. PMID:22760401

Hasan, M S; Ahmed, I; Parsons, A J; Walker, G S; Scotchford, C A



X-ray absorption spectroscopy study of the local environment around tungsten and molybdenum ions in tungsten-phosphate and molybdenum-phosphate glasses  

Microsoft Academic Search

X-ray absorption spectroscopy (XAS) was used to study the local environment around tungsten and molybdenum ions in BaO-P2O5-WO3 and CaO-P2O5-MoO3 glasses having different composition of WO3 and MoO3 oxides. The W L1,3 and Mo K edges x-ray absorption spectra were measured in transmission mode at room temperature using the synchrotron radiation emitted by the ADONE and LURE DCI storage rings,

A. Kuzmin; J. Purans



Phosphorous pentoxide mediated synthesis of 5-HMF in ionic liquid at low temperature.  


A convenient, mild and environment-friendly dehydration reaction of fructose in ionic liquid using phosphorous pentoxide (P(2)O(5)) has been investigated. The acidic nature of P(2)O(5) along with its hygroscopic properties has been successfully utilized to afford 81.2% yield of 5-hydroxymethylfurfural (5-HMF) at 50°C in 60 mins. Phosphoric acid yielded remarkably less 5-HMF even at higher temperature and longer reaction times. The reaction was optimized by varying different parameters and the results indicated that no rehydration products, such as levulinic acid or formic acid, were formed. PMID:21889125

Ray, Devalina; Mittal, Neha; Chung, Wook-Jin



Influence of analogue-resistant mutants of Azotobacter chroococcum solubilizing phosphate on yield and quality of sunflower ( Helianthus annuus )  

Microsoft Academic Search

Two phosphate-solubilizing analogue-resistant mutants ofAzotobacter chroococcum showed a positive interactive effect on sunflower (Helianthus annuus). Plant height, leaf area, seed mass, seed yield, protein and oil content increased significantly by inoculation withA. chroococcum mutants. Both levels of fertilizers applied (80N+30P2O5 and 80N+60P2O5 kg\\/hm2 showed increased seed yield. Likewise, inoculation resulted in a significantly higher yield. Application ofP-solubilizingA. chroococcum strains with

V. Kumar; N. Kumar Aggarwal; B. P. Singh



X-ray absorption spectroscopy and high-energy XRD study of the local environment of copper in antibacterial copper-releasing degradable phosphate glasses  

Microsoft Academic Search

Phosphate-based glasses of the general formula Na2O–CaO–P2O5 are degradable in an aqueous environment, and therefore can act as antibacterial materials through the inclusion of ions such as copper. In this study, CuO and Cu2O were added to Na2O–CaO–P2O5 glasses (1–20mol% Cu) and X-ray absorption spectroscopy (XAS) and high-energy X-ray diffraction (HEXRD) used to probe the local environment of the copper

D. M. Pickup; I. Ahmed; V. Fitzgerald; R. M. Moss; K. M. Wetherall; J. C. Knowles; M. E. Smith; R. J. Newport



Highly refractory glass-ceramics suitable for incorporating radioactive wastes  

SciTech Connect

This invention is concerned with the production of glass ceramics especially suitable for incorporating radioactive wastes. The inventive glass-ceramics contain at least two crystal phases selected from the group of pollucite, mullite, monazite, and, optionally, tetragonal or cubic zirconia as the predominant crystal phases and consist essentially, expressed in weight percent on the oxide basis, of 5-40% cs2o, 15-50% al2o3, 0-30% la2o3+ceo2, 0-20% p2o5, 0-30% zro2, 12-65% la2o3+ceo2+p2o5, and 15-50% sio

Beall, G.H.; Rittler, H.L.



The effects of the mode of preparation on the anticorrosion properties of Ca-Zn and Mg-Zn borophosphates  

Microsoft Academic Search

Twelve pigment compositions derived from the xCaO·(50?x)ZnO·20B2O3·30P2O5·(x=10, 20, 30) and yMgO·(50?y)ZnO·20B2O3·30P2O5·(y=10, 20, 30) systems were prepared. The synthesis was carried out either by the medium-temperature process or by the high-temperature process followed by cooling in air and an isothermal crystallisation of the glass obtained. The pigments prepared by the medium-temperature process achieved better corrosion results in styrene-acrylate coating formulations, whereas

P. Mošner; A. Kalendova´; L. Koudelka



Revision curricular a partir de un analisis comparativo de las discrepancias en los curriculos de una escuela de optometria en Puerto Rico con las competencias requeridas para las agencias de revalida y acreditacion 2004  

NASA Astrophysics Data System (ADS)

El proposito de esta investigacion, un estudio cualitativo de caso, fue comparar y contrastar el curriculo vigente de la Escuela de Optometria de la UIAPR con las competencias y estandares requeridos por las agencias de acreditacion y de revalida. Con este proposito, decidimos realizar una revision y un analisis de documentos: el prontuario de cada uno de los cursos de los curriculos implantados en el 1993 y en el 2001; las competencias y estandares establecidos por las agencias de revalida y de acreditacion; y las estadisticas en las que se analiza el porcentaje de estudiantes que aprueban cada una de las partes de los examenes de revalida entre el 1998 al 2003. Se realizaron entrevistas dirigidas para dar apoyo y complementar la revision y el analisis de estos documentos. Los participantes de las entrevistas fueron tres estudiantes de la clase de optometria del 2004 (ultima clase del curriculo del 1993); tres estudiantes de la clase de optometria del 2005 (primera clase graduanda del curriculo vigente) y tres profesores y/o directores de los Departamentos de Ciencias Basicas, Ciencias Clinicas y Cuidado al Paciente. Esta investigacion se enmarco en el modelo de evaluacion curricular de discrepancia de Malcolm Provus y en el modelo de desarrollo basado en competencias. Uno de los hallazgos mas importantes del estudio es que los cambios que se implantaron al curriculo del 2001 no han logrado que los estudiantes mejoren su ejecucion en los examenes de revalida. Por otro lado, se encontro que el curriculo vigente atiende completamente los estandares de la practica de Optometria, pero no las competencias. Esta informacion fue validada mediante el uso de una tabla de cotejo para el analisis de los cursos y de la informacion obtenida de las entrevistas. El estudio determina y concluye que existen discrepancias entre los prontuarios de los cursos del curriculo y las competencias requeridas por la agencia de revalida. Segundo, que el Departamento de Ciencias Basicas es el que presenta mas deficiencias en el desarrollo de las competencias. El investigador recomienda disenar e implantar un curriculo basado en competencias y proveer formacion en didactica y procesos de aprendizaje a los profesores.

Rivera Pacheco, Andres


Synthesis, characterization, and glutathionylation of cobalamin model complexes [Co(N4PyCO2Me)Cl]Cl2 and [Co(Bn-CDPy3)Cl]Cl2.  


Synthetic Co(III) complexes containing N5 donor sets undergo glutathionylation to generate biomimetic species of glutathionylcobalamin (GSCbl), an important form of cobalamin (Cbl) found in nature. For this study, a new Co(III) complex was synthesized derived from the polypyridyl pentadentate N5 ligand N4PyCO(2)Me (1). The compound [Co(N4PyCO(2)Me)Cl]Cl(2) (3) was characterized by X-ray crystallography, UV-vis, IR, (1)H NMR, and (13)C NMR spectroscopies and mass spectrometry (HRMS). Reaction of 3 with glutathione (GSH) in H(2)O generates the biomimetic species [Co(N4PyCO(2)Me)(SG)](2+) (5), which was generated in situ and characterized by UV-vis and (1)H NMR spectroscopies and HRMS. (1)H NMR and UV-vis spectroscopic data are consistent with ligation of the cysteine thiolate of GSH to the Co(III) center of 5, as occurs in GSCbl. Kinetic analysis indicated that the substitution of chloride by GS(-) occurs by a second-order process [k(1) = (10.1 ± 0.7) × 10(-2) M(-1) s(-1)]. The observed equilibrium constant for formation of 5 (K(obs) = 870 ± 50 M(-1)) is about 3 orders of magnitude smaller than for GSCbl. Reaction of the Co(III) complex [Co(Bn-CDPy3)Cl]Cl(2) (4) with GSH generates glutathionylated species [Co(Bn-CDPy3)(GS)](2+) (6), analogous to 5. Glutathionylation of 4 occurs at a similar rate [k(2) = (8.4 ± 0.5) × 10(-2) M(-1) s(-1)], and the observed equilibrium constant (K(obs) = 740 ± 47 M(-1)) is slightly smaller than for 5. Glutathionylation showed a significant pH dependence, where rates increased with pH. Taken together, these results suggest that glutathionylation is a general reaction for Co(III) complexes related to Cbl. PMID:22316335

Prakash, Jai; Kodanko, Jeremy J



Síndrome de Stevens-Johnson y necrólisis epidérmica tóxica por profilaxis con TARGA en el Hospital Nacional Almanzor Aguinaga Asenjo, Lambayeque,Perú Stevens Johnson syndrome and toxic epidermal necrolysis induced by HAART prophylaxis in the National Hospital Almanzor Aguinaga Asenjo, Lambayeque, Perú  

Microsoft Academic Search

RESUMEN Síndrome de Stevens-Johnson (SSJ) y necrólisis epidérmica tóxica (NET) son reacciones inflamatorias agudas originadas por hipersensibilidad (reacción inmunológica), que incluye piel y membranas mucosas. Se presenta un caso de reacción adversa medicamentosa en un paciente varón de 25 años, que recibió profilaxis con Terapia Antiretroviral de Gran Actividad. Presentó exantema, que progresa a SSJ y evoluciona a NET. Permaneció

Victor A. Soto Cáceres; Rosa E. Rodríguez Barboza



Has allogeneic stem cell cryopreservation been given the 'cold shoulder'? An analysis of the pros and cons of using frozen versus fresh stem cell products in allogeneic stem cell transplantation.  


Donor stem cells for allogeneic transplant traditionally are collected and transfused 'fresh' into the recipient on the day of transplant; alternatively such cells can be collected in advance and cryopreserved until needed. Most centers favor the former approach based on theoretical concerns that cryopreservation and thawing may worsen clinical outcomes. Limited published data from single institution retrospective studies show no significant impairment of engraftment or reduced day 100 survival for cryopreserved bone marrow recipients. There are no reported outcomes for recipients of cryopreserved peripheral blood allografts. Use of cryopreserved stem cells is associated with a higher incidence of adverse events (transfusion reactions, bacterial graft contamination and collection of grafts which are not utilized). Conversely, use of cryopreserved grafts introduces a greater flexibility into a stressed healthcare system and results in a more streamlined experience for the donor. Some data suggest that transplantation with a cryopreserved product may lower the incidence of acute graft-versus-host disease. We compare the pros and cons of using 'fresh' versus cryopreserved stem cell products for allogeneic transplantation and suggest that the current standard of using 'fresh' products may not be warranted. We also suggest future areas of exploration to better elucidate this issue. PMID:16892075

Frey, N V; Lazarus, H M; Goldstein, S C



Brewers' spent grain (BSG) protein hydrolysates decrease hydrogen peroxide (H2O2)-induced oxidative stress and concanavalin-A (con-A) stimulated IFN-? production in cell culture.  


The present study investigated the bioactivity of protein hydrolysates and fractionated hydrolysates prepared from brewers' spent grain (BSG) using proteases, including Alcalase 2.4L, Flavourzyme and Corolase PP. Hydrolysates were designated K-Y, including fractionated hydrolysates with molecular weight (m.w.) < 3, <5 and >5 kDa. Where computable, IC50 values were lower in U937 (1.38-9.78%) than Jurkat T cells (1.15-13.82%). Hydrolysates L, Q and R and fractionated hydrolysates of U and W (<3, <5, >5 kDa) significantly (P < 0.01) protected against hydrogen peroxide (H2O2)-induced reduction of superoxide dismutase (SOD) activity. A fractionated hydrolysate of W (<5 kDa) protected against H2O2-induced DNA damage, P < 0.01. Hydrolysates K, N, P, U, U > 5 kDa, V, V > 5 kDa, W, W > 5 kDa significantly (P < 0.05) reduced a concanavlin-A (con-A) stimulated production of interferon-? (IFN-?). In conclusion, BSG protein hydrolysates demonstrate bioactivity in vitro; lower m.w. hydrolysates (<3, <5 kDa) show greatest antioxidant activity and unfractionated or higher m.w. hydrolysates (>5 kDa) possess anti-inflammatory effects. PMID:24113874

McCarthy, Aoife L; O'Callaghan, Yvonne C; Connolly, Alan; Piggott, Charles O; Fitzgerald, Richard J; O'Brien, Nora M



The office surgical suite: pros and cons.  


Today interest and enthusiasm regarding facial plastic surgery is burgeoning. Office surgery provides a new, more expedient, comfortable method of delivery of health care while directly responding to the growing concern among the public and government for improved cost containment of medical services. Awareness of improved surgical techniques and facilities will help to ensure tomorrow's continued growth and satisfaction for both the surgeon and his patient. PMID:7393580

Simons, R L



Pros and cons of subpectoral implantation.  


At the present time, there is no universally accepted surgical technique or prosthesis for augmenting breast volume. Each surgeon has to choose with regard to shape, consistency, and volume, according to his own conviction and respecting his patient's priorities. These priorities will vary with age, profession, sexual habits, and marital and social status. In order to get the best possible results, the plastic surgeon should be adept at alternative methods and should not be restricted to one technique or one prosthesis. Patients vary considerably so our methods should be diversified. Our subpectoral implantations have given us better results than our retroglandular ones, which have been performed during the same period of time and with the same prosthesis. Consequently, retropectoral implantation is still our preferred procedure. We think that this technique, with its proper indications, deserves wider application. PMID:1261186

Papillon, J



La relazione analitica con i pazienti schizoidi  

Microsoft Academic Search

da molti anni che mi dedico a mettere in luce il funzionamento dei pazienti schizoidi. Non già a comprendere il Disturbo Schizoide di Personalità descritto in tassonomie psichiatriche come il DSM, ma la let- tura psicoanalitica fenomenologica delle problematiche schizoidi. Ho sempre avuto un grande interesse ad esplorare le differenze individuali più che a definire ciò che è o non

Nancy McWilliams


Análisis de Variabilidad con Modelos de Objetivos  

Microsoft Academic Search

Dentro del campo de la variabilidad, o la habilidad de cambio o personalización de un sistema, no es común que dicha variabilidad se tenga en cuenta en la definición de requisitos. En las propuestas donde si se contemplan se utilizan directamente features, aunque no son una técnica de elicitación de requisitos, sino que más bien están a medio camino entre

Bruno González-Baixauli; Miguel A. Laguna; Sampaio do Prado



Pros and cons of apartment complex submetering  

Microsoft Academic Search

Mastermetering was popular when energy costs were low, but landlords can no longer raise rents fast enough to keep up with rising utility costs. Individual metering and submetering are a growing trend in Texas in order to regulate cash flow and keep rents competitive. Individual metering encourages conservation, but reduces the owner's incentives to improve building efficiency. Owners may not

G. Reichelt; J. Jones



Tratamiento nutricional del niño con trastorno neuromotor  

Microsoft Academic Search

The risk of suffering malnutrition is very high in children and adolescents who suffer a certain type of neuromotor pathology (NP) due to different factors that occur in them: motor coordination disorders in the different stages of deglutition, gastroesophageal reflux, oesophagitis, gastritis, gastrocolic reflex alteration, constipation, anorexia, etc. These disorders alter the desirable proportionality between the amount of food given

Isabel Polanco Allué



Cálculos ab initio con correlación electrónica  

Microsoft Academic Search

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

M. Merchán Bonete



Polarimetría de estrellas con discos de ``escombros''  

NASA Astrophysics Data System (ADS)

We present optical polarimetric measurements of a set of ˜100 solar-type stars with and without debris disks. The selection of these objects were based on the presence of excesses in the spectral energy distributions. This sample is complemented with a group of stars from the northern hemisphere with similar characteristics. A statistical comparison of the stars with and without disk shows no significant differences in the observed polarizations. However, we identified a subset of objects (<10 % of the whole sample) with polarizations above the median that not follow the Law of Serkowsky. These polarizations might be due to the presence of disks. FULL TEXT IN SPANISH

García, L.; Gómez, M.


Dismenorrea por útero unicorne con cuerno rudimentario  

Microsoft Academic Search

Dysmenorrhea is highly frequent in adolescents and young women, affecting 40-50% of this population to some degree.Unicornuate uterus with rudimentary horn and functional endometrium can cause dysmenorrhea due to the distension produced by blood in a closed cavity and the consequent development of hematometra, hematosalpinx, and retrograde menstruation. Treatment is necessarily surgical and the recommended intervention is excision of the

Borja Rivero; Iurdana Aizpitarte; Ainhoa Elvira; José Ramón Becerro



Alteraciones dermatológicas en pacientes con anemias carenciales  

Microsoft Academic Search

Objectives: To determine the frequency of anemia-related dermatological abnormalities and severity. Materials and Methods: A sample of 100 subjects older than 18 years with a diagnosis of nutritional anemia who were admitted at 2 de Mayo Hospital between January and November, 2004 was studied. In each subject we measured total CBC and serum iron, ferritin, folate, and cobalamin levels. Results:

Oscar Ruiz; Luz Bardales; David Díaz; Carlos Galarza; Carlos Delgado; Oscar Castillo; Manuela Marangoni; Carlos Montenegro



The Pros and Cons of Petroleum Agreements.  

ERIC Educational Resources Information Center

A mineral agreements expert discusses the options open to tribes, from the most standard lease form to arrangements as yet untried by Indian Nations. Discussion covers 18 basic provisions for inclusion in agreements, tax considerations, and basic forms of petroleum agreements (leases, joint ventures, production sharing, and service contracts).…

Lipton, Charles J.



Localización de Insulinoma Pancreático con Ultrasonografía Laparoscópica  

Microsoft Academic Search

The case of a 51-year-old woman with a clinical history of hipoglicemia caused by a presumed pancreatic insulinoma is reported. Laboratory tests pointed out for a insulinoma, but imaginologic studies could not locate the tumor. Under this circumstances, the patient was laparoscopically approached. By means of the ultrasononography device the tumor was located at the uncinate process of the pancreas

Francisco Berrospi Espinoza; Juan Celis Zapata; Eloy Ruiz Figueroa; Iván Chavez


Stepwise versus Hierarchical Regression: Pros and Cons  

ERIC Educational Resources Information Center

Multiple regression is commonly used in social and behavioral data analysis. In multiple regression contexts, researchers are very often interested in determining the "best" predictors in the analysis. This focus may stem from a need to identify those predictors that are supportive of theory. Alternatively, the researcher may simply be interested…

Lewis, Mitzi



Vencemos Con Libros Y La Lengua.  

National Technical Information Service (NTIS)

The city of Richmond, California has many residents who read and speak only Spanish, and many other Chicanos and Latin Americans who are interested in their heritage. The Service Center Branch of the public library has a collection of books, magazines, an...

D. F. Duran



Nanoparticles: Health Effects--Pros and Cons  

PubMed Central

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.

Gwinn, Maureen R.; Vallyathan, Val



Roofing with Urethane: Pro and Con.  

ERIC Educational Resources Information Center

|Gerald Scott's favorable evaluation of the foamed polyurethane roofing system is based on experiences with 55 buildings at Texas A & M. Michael Kinzer, an architect at Colorado State University, disagrees and claims that the system is difficult to install and maintain, and the cost prohibitive. (MLF)|

Kinzer, Michael; Scott, Gerald P.E.



Planetas extrasolares con pequeño semieje orbital  

NASA Astrophysics Data System (ADS)

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, ( 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 these systems and the Solar System were observed. The mass of these planets are, in general, bigger than Jupiter, the measured semimayor axes have a low limit of 0.04 AU, the ten part of Mercury semimayor axe. Further, the excentricities take different values from almost 0 to 0.93, in contrast to our system where the planetary orbits are approximately circular. Among the extra solar planets detected until August 2002, it is possible to observe a deficiency of massive planets (Mp sin I < 3.5 Mj) near the primary star, i.e. semimayor axe below 0.1 AU, with excentricity below 0.2. The goal of this work is to attempt an explanation of these cases by an eliptic planar model in which two point planets interac gravitationaly. The motion equations are analized for different initial conditions by using numerical methods. The motion equations were stated and several pairs of particles were generated by varying the relative masses and the orbital elements. To integrate the equations the Bulirsh - Stoer code was used, with a 10-12 accuracy. As a control variable of the results the calculus of energy was used. The total span of integrations was 106 years. The outputs of the numerical simulations show several dynamic behaviors for the particles: - Lower mass escapes to the outside of the system - Stability in both bodies - Less massive planet fall to the primary star Moreover, by comparing the results obtained for objets with identical initial conditions in their orbital parameters, but with different relations of mass, it is possible to distinguish two types of behaviours: - during the integration time there is dynamical estability if both masses are below 3.5Mj. - the less massive planet fall to the star if the other mass is about 10Mj. in this case the major body increase his semimajor axe in order to preserve the constancy of the angular moment of the total system. The simulations performed have shown results with a high dependence of the values of the initial conditions and the masses of the planets considered.

Giuliodori, D.; Fernández, S.


Coal gasification\\/pros and cons  

Microsoft Academic Search

About 80% of total remaining U.S. fossil fuel resource is in the form of coal. World oil production is expected to peak not later than 2000; a precipitous rise in world oil prices can be expected. Currently SNG from coal at a cost of $3.50 to $4.50\\/million Btu, is equivalent to oil at $15 to $25\\/bbl. Low-Btu gas from coal



The pros and cons of phytoestrogens  

PubMed Central

Phytoestrogens are plant derived compounds found in a wide variety of foods, most notably soy. A litany of health benefits including a lowered risk of osteoporosis, heart disease, breast cancer, and menopausal symptoms, are frequently attributed to phytoestrogens but many are also considered endocrine disruptors, indicating that they have the potential to cause adverse health effects as well. Consequently, the question of whether or not phytoestrogens are beneficial or harmful to human health remains unresolved. The answer is likely complex and may depend on age, health status, and even the presence or absence of specific gut microflora. Clarity on this issue is needed because global consumption is rapidly increasing. Phytoestrogens are present in numerous dietary supplements and widely marketed as a natural alternative to estrogen replacement therapy. Soy infant formula now constitutes up to a third of the US market, and soy protein is now added to many processed foods. As weak estrogen agonists/antagonists with molecular and cellular properties similar to synthetic endocrine disruptors such as Bisphenol A (BPA), the phytoestrogens provide a useful model to comprehensively investigate the biological impact of endocrine disruptors in general. This review weighs the evidence for and against the purported health benefits and adverse effects of phytoestrogens.

Patisaul, Heather B.; Jefferson, Wendy



Distance Education: Pros, Cons, and the Future.  

ERIC Educational Resources Information Center

This paper reviews recent publications on distance education and explores its promise and potential from the student's perspective, the faculty's perspective and the administrator's perspective. Findings indicate that only the self-motivated and self-disciplined students are most likely to succeed in distance education. Although the majority of…

Li, Hongmei


Omega-3 in antiarrhythmic therapy : cons position.  


The association between omega-3 (n-3 polyunsaturated fatty acids) and the clinical outcome of patients with cardiovascular diseases such as coronary heart disease is currently unclear, especially regarding its possible antiarrhythmic effects and the not quite understood mechanisms of action. In the last 15 years, several epidemiological studies have shown a lower incidence of sudden cardiac death with a diet rich in omega-3 or fish consumption. The antiarrhythmic properties related to omega-3 have been related to modulation of sodium-dependent ion channels or sodium-calcium exchangers of myocytes through a reduction of their excitability especially in ischaemic or damaged myocardial tissue. However, the results of experimental studies have not always been consistent. Although the role of omega-3 in preventing sudden cardiac death has been evaluated in several clinical trials that included patients with coronary artery disease (particularly in patients with post-myocardial infarction), the interpretation of such data must be treated with extreme caution. In particular, while a reduction in cardiac death was demonstrated by a meta-analysis of several randomized clinical trials, a reduced risk of sudden cardiac death has been described only in the GISSI-Prevenzione study, while in other studies the evidence that emerged is more controversial, with wide confidence intervals that support the possibility of heterogeneity in the distribution of the factors involved in the efficacy of treatment. Omega-3 is probably involved in the prevention of cardiovascular mortality through different mechanisms, and it is crucial to study its association with other drugs such as ACE inhibitors or calcium channel blockers. The study of antiarrhythmic drugs has been divided into prevention of supraventricular and ventricular arrhythmias. In these conditions, the role of omega-3 seems to be more pronounced in atrial tachyarrhythmias such as atrial fibrillation, but does not have a role in ventricular arrhythmias. In summary, the antiarrhythmic effect of omega-3 is not clearly evident and further studies are needed to investigate its beneficial effect in cardiac mortality compared with arrhythmic death. PMID:23430665

Borghi, Claudio; Pareo, Ilenia



Payment for donor kidneys: pros and cons.  


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

Friedman, E A; Friedman, A L



Payment for donor kidneys: Pros and cons  

Microsoft Academic Search

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

E A Friedman; A L Friedman



Construyendo con Ladrillo (Building with Brick).  

National Technical Information Service (NTIS)

The purpose of the manual is to present, in tutorial form, the concepts and procedures of engineering needed to construct a practical home at minimum costs and with maximum protection from the elements, including earthquakes. Covered in detail are: (1) Pa...



Natural-born con artists and counterfeiters  

PubMed Central

Deception is ubiquitous in plant and animal kingdoms and is widely thought to provide selective advantages to the individual and evolutionary success to the species. Mimicry, a form of deception whereby an individual imitates their model to advantage by closely resembling their behavior or appearance, is particularly well documented and represented by the peripheral eyespots seen on the wings of many butterfly species. The significance of butterfly eyespots has been convincingly demonstrated to serve as an anti-predatory function either by imitation of a predator’s own dangerous enemies (intimidation hypothesis) or by deflecting predator strikes toward less-vital parts of the body (deflection hypothesis). A convincing and compelling explanation in butterflies, the functional role of eyespots as anti-predatory devices has become a widely held and firmly entrenched belief that has been freely adopted into other systems. Here we comment on a recent paper that demonstrates a vastly different role for eyespots, that of intra-specific male-male competition, and make the point that even long-held beliefs need to be tested and challenged under different contexts if we are not to be deceived ourselves.

Depczynski, Martial; Gagliano, Monica



Nuclear issues: weighing the pros and cons  

Microsoft Academic Search

Some of the controversial issues over radioactivity release, accident potential, security, waste management, and plutonium are reviewed in terms of weighing potential and existing risks of nuclear energy against the benefits. Many areas in Canada have found uranium fuel to be competitive and more readily available than other energy sources. Comparisons of nuclear and coal-fired plants over a 30-year service




Farmacoterapia en el paciente con claudicación intermitente  

Microsoft Academic Search

Intermittent claudication is the most common symptom of peripheral arterial disease. Besides the limitation in the quality of life of the patient, it represents an independent risk factor and high cardiovascular mortality. The overall treatment strategy begins with an adequate control of vascular risk factors and lifestyle habits of the patient. We also associate drugs to reduce the occurrence of

A. Rodríguez-Morata; C. Esteban-Gracia; A. Fernández-Heredero; R. Riera-Vázquez; F. Vaquero-Lorenzo; J. R. March-García



Mandatory Arbitration: Weighing the Pros and Cons  

ERIC Educational Resources Information Center

|When big businesses enter into mandatory arbitration agreements with consumers, the large companies typically tout the fairness while the individual is left feeling cheated. Now that mandatory arbitration clauses are finding their way into more and more contracts signed by school systems, school boards and district administrators are realizing…

Settenbrino, Susan D.



Weighing the Pros and Cons of TAP  

ERIC Educational Resources Information Center

|Headlines offer a plethora of opinions and arguments both for and against proposed and newly implemented teacher evaluation systems all over the United States. Hardly anyone balks at the idea of evaluating teachers, but many question whether these new evaluation systems really improve teaching and learning. The author's experience with the new…

Pieczura, Michelle



Perfil inmunológico del paciente con esporotricosis linfocutánea  

Microsoft Academic Search

Sporotrichosis is characterized by a wide range of clinical manifestations from mild fixed cutaneous forms to systemic dissemination of the disease, despite an apparent regular pattern of virulence of the etiological agent, S. schenckii. These facts suggest that immunological mechanisms of the host could play an important role on the pathogenesis of the mycosis. On this basis, an immunologic survey

Consuelo E. Meléndez Ruiz; Amado Gonzfilez Mendoza; José Manuel Sotomayor; Victor M. Ruiz Godoy; Rodolfo Ramos Zepeda



The Big Con: China's Historical Sabotage  

ERIC Educational Resources Information Center

|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.…

Terrence Cheng



Hester Prynne as Role Model: Pro & Con.  

ERIC Educational Resources Information Center

|McWalters denies DeSalvo's previous claim (see EJ 209 302) that "The Scarlet Letter" harms students through its message of repressed sexuality; he suggests that the book does not condemn sexuality. DeSalvo replies that "The Scarlet Letter" is presented to students in a harmful way; she again calls for the use of literature that celebrates…

McWalters, John B.; DeSalvo, Louise



Mandatory Arbitration: Weighing the Pros and Cons  

ERIC Educational Resources Information Center

When big businesses enter into mandatory arbitration agreements with consumers, the large companies typically tout the fairness while the individual is left feeling cheated. Now that mandatory arbitration clauses are finding their way into more and more contracts signed by school systems, school boards and district administrators are realizing…

Settenbrino, Susan D.



[Debate about breast cancer: "Cons: Intraoperative radiotherapy"].  


Early breast cancer incidence increases owing to mammography screening. Hypofractionated radiotherapy is more and more proposed in women with low local relapse risk breast cancer, especially accelerated partial breast irradiation. Various irradiation modalities have been reported: brachytherapy, intraoperative irradiation, 3D-conformal accelerated partial breast irradiation. We describe limitations of intraoperative irradiation and the advantages of alternative techniques. PMID:21795091

Bourgier, C; Heymann, S; Verstraet, R; Biron, B; Marsiglia, H



[Legalization of drugs--pro and con].  


This article deals with various opinions and assertions regarding drug legalization. Societal and clinical implication regarding the effect of decrease or increase in the use of psyhoactive substances, on public health, violence and criminal activities have been pointed out. The relation between legal and illegal drugs has been considered. Special attention has been paid to arguments on legalization and decriminalization of marihuana and possible consequences on the risk group-children and adolescents. Experiences from USA and some European countries have been presented. Having in mind the specific situation in BiH, the author of article gives her own view and suggest the introduction of harm reduction strategy into BiH drug policy, without changing the legal drug status. PMID:11769432

Marjanovi?-Cengi?, S




Microsoft Academic Search

The reunion with the Graphic Figuration: A methodologic proposal for the visual and plastic education in Secondary Level The eternal question: Why do we become ourselves to inhibited adults and inhibited youth at the time to manifest ourselves with the plastic language?. In the plastic and visual education in the secondary level, we find ourselves with the pupils that always




Microsoft Academic Search

band would play for shows and dances. Although Jack and the other band members promised to take good care of young Ron, the under-age musician admits to hearing lots of dirty jokes, which he thoroughly enjoyed With his father, being a fine musician himself, playing old time fiddle music, Ron was fortunate to be exposed to all the talent of



21 CFR 74.2053 - D&C Black No. 3.  

Code of Federal Regulations, 2010 CFR

...named, to the extent that such other impurities may be avoided by current good manufacturing practices: (1) Calcium hydroxyapatite (CaO and P2 O5 ), not less than 75 percent and not more than 84 percent; (2) Elemental carbon, not less...



21 CFR 74.2053 - D&C Black No. 3.  

Code of Federal Regulations, 2010 CFR

...named, to the extent that such other impurities may be avoided by current good manufacturing practices: (1) Calcium hydroxyapatite (CaO and P2 O5 ), not less than 75 percent and not more than 84 percent; (2) Elemental carbon, not less...



Structural studies of boron and tellurium coordination in zinc borophosphate glasses by 11B MAS NMR and Raman spectroscopy  

NASA Astrophysics Data System (ADS)

Zinc borophosphate glasses doped with TeO2 with different B2O3/P2O5 ratio were prepared, their basic properties were determined and their structure was studied by 11B MAS NMR and Raman spectroscopies. Structural studies were devoted to the investigation of changes in boron coordination in the dependence on changes in TeO2 content and in B2O3/P2O5 ratio in the borophosphate glasses. A special attention was devoted to the formation of mixed structural units B(OP)4-n(OTe)n in the studied borophosphate glasses, where by the deconvolution of 11B MAS NMR spectra quantitative data on the number of BO3 and B(OP)4-n(OTe)n mixed structural units were obtained. Raman spectra showed shortening of phosphate chains both with increasing TeO2 and B2O3 content. Raman spectra also showed that with the replacement of P2O5 by B2O3 in the studied glasses TeO4 units are replaced by TeO3 units as the number of oxygen atoms in the glass decreases when the B2O3/P2O5 ratio increases.

Vosejpková, Kate?ina; Koudelka, Ladislav; ?ernošek, Zden?k; Mošner, Petr; Montagne, Lionel; Revel, Bertrand



Untersuchungen zur Ertüchtigung der Nitrifikation bei der Betriebsabwasser- reinigungsanlage einer Tierkörperverwertung  

Microsoft Academic Search

Kurzfassung: Seit den frühen neunziger Jahren weist die innerbetriebliche Abwasserreinigungsanlage einer Tierkörperverwertungsanstalt , deren gereinigtes Abwasser in eine kommunale Kläranlage eingeleitet wird, während der Sommermonate regelmäßig Nitrifikationsprobleme auf. Durch erste Untersuchungen im Jahr 1992 konnte ein Phosphormangel der Mikroorganismen erkannt und durch vermehrte Zugabe von P2O5 beseitigt werden. Eine neuerlich extrem schlechte Nitrifikationsleistung veranlasste die Betriebsleitung 1996 zum Bau einer

Gerald Wandl; Manfred Clara; Norbert Kreuzinger; Otto Nowak


Effect of Acid Gases on the Pigment Composition of the Leaves of Trees and Lawn Plants (Vliyanie Kislykh Gazov na Pigmentnyi Sostav Listev Drevesnykh i Gazonykh Rastenii).  

National Technical Information Service (NTIS)

The chlorophyll a and b, carotene, lutein, violaxanthin, and neoxanthin contents in the leaves of plants, subjected during various phases of their growth and development to acid gases such as SO2, NO2, F, HF, and P2O5 in various concentrations, were studi...

V. V. Suslova V. S. Nikoloevskii



Shielding properties of lead and barium phosphate glasses  

NASA Astrophysics Data System (ADS)

P2O5-PbO-BaO glass system has been investigated to see its potential use as radiation shielding material by studying the effect of the content of each of its composing oxides. The results show that this glass system is suitable as radiation shielding material and has some advantages comparing to the existing commonly used radiation protection glasses.

Kharita, M. H.; Jabra, R.; Yousef, S.; Samaan, T.



40 CFR 60.204 - Test methods and procedures.  

Code of Federal Regulations, 2013 CFR

... 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...



40 CFR 60.234 - Test methods and procedures.  

Code of Federal Regulations, 2013 CFR

...equation: 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...



40 CFR 60.214 - Test methods and procedures.  

Code of Federal Regulations, 2013 CFR

... 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...



40 CFR 60.224 - Test methods and procedures.  

Code of Federal Regulations, 2013 CFR

... 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...



Investigaccion-accion en la sala de clases sobre las creencias de la cultura de la ciencia de un grupo de estudiantes universitarios y su relacion reciproca con el aprendizaje de las ciencias biologicas  

NASA Astrophysics Data System (ADS)

La investigacion---accion que se llevo a cabo en la sala de clases tenia como punto de partida las creencias de la cultura de la ciencia de un grupo de estudiantes universitarios para luego examinar sus implicaciones en el proceso de aprendizaje de las Ciencias Biologicas. ¿Que se supone que hagan las creencias en relacion con el aprendizaje? ¿En que consiste incorporar este aspecto a la practica educativa universitaria? Utilizando el modelo de Kemmis y McTaggart (1987) la investigacion-accion se planteo como un proceso dinamico en cuatro momentos en espiral constituidos por la planificacion, la accion, la observacion y la reflexion. Cada una de las fases tuvo una intencion retrospectiva y prospectiva formando una espiral de autorreflexion del conocimiento y la accion. Se llevaron a cabo audio grabaciones en clases y analisis de documentos. Ademas, la profesora-investigadora hizo un portafolio para reflexionar sobre las creencias de la cultura de la ciencia que tienen los estudiantes y las creencias del aprendizaje que tiene la profesora y sobre como la comprension de estos elementos ayudo a mejorar su practica educativa a traves del tiempo. Los resultados obtenidos apuntan a que las creencias de la cultura de la ciencia que tiene el grupo de estudiantes son diversas. Ellos si creen que la ciencia tiene una cultura la cual describieron como: complicada y desconocida que evoluciona constantemente, que es un conjunto de metodos, que es altamente tecnologica, que resuelve problemas de salud, ayuda a interpretar la realidad del mundo que los rodea y su origen y que existen unas intersecciones entre la ciencia y el poder. Sobre las creencias del proceso de aprendizaje de la profesora-investigadora, estas senalan que el modelaje de actores, la vision de la academia que tiene ella asi como la participacion y negociacion entre todos los involucrados en el proceso educativo, son factores que inciden en el proceso de aprendizaje.

Cordova-Santiago, Lizzette Astrid


WGS Catalysis and In Situ Studies of CoO1-x, PtCon/Co3O4, and PtmCom'/CoO1-x Nanorod Catalysts.  


Water-gas shift (WGS) reactions on Co3O4 nanorods and Co3O4 nanorods anchoring singly dispersed Pt atoms were explored through building correlation of catalytic performance to surface chemistry of catalysts during catalysis using X-ray absorption spectroscopy, ambient pressure X-ray photoelectron spectroscopy (AP-XPS), and environmental TEM. The active phase of pure Co3O4 during WGS is nonstoichiometric cobalt monoxide with about 20% oxygen vacancies, CoO0.80. The apparent activation energy (Ea) in the temperature range of 180-240 °C is 91.0 ± 10.5 kJ mol(-1). Co3O4 nanorods anchoring Pt atoms (Pt/Co3O4) are active for WGS with a low Ea of 50.1 ± 5.0 kJ mol(-1) in the temperature range of 150-200 °C. The active surface of this catalyst is singly dispersed Pt1Con nanoclusters anchored on Co3O4 (Pt1/Co3O4), evidenced by in situ studies of extended X-ray absorption fine structure spectroscopy. In the temperature range of 200-300 °C, catalytic in situ studies suggested the formation of PtmCom' nanoclusters along with the reduction of Co3O4 substrate to CoO1-x. The new catalyst, PtmCom'/CoO1-x is active for WGS with a very low Ea of 24.8 ± 3.1 kJ mol(-1) in the temperature range of 300-350 °C. The high activity could result from a synergy of PtmCom' nanoclusters and surface oxygen vacancies of CoO1-x. PMID:23611190

Zhang, Shiran; Shan, Jun-Jun; Zhu, Yuan; Frenkel, Anatoly I; Patlolla, Anitha; Huang, Weixin; Yoon, Seog Joon; Wang, Lei; Yoshida, Hideto; Takeda, Seiji; Tao, Franklin Feng



Extraction and coordination studies of the unexplored bifunctional ligand carbamoyl methyl sulfoxide (CMSO) with uranium(VI) and cerium(III) nitrates. Synthesis and structures of [UO2(NO3)2(PhSOCH2CON(i)Bu2)] and [Ce(NO3)3(PhSOCH2CONBu2)2].  


The bifunctional carbamoyl methyl sulfoxide ligands, PhCH(2)SOCH(2)CONHPh (L1), PhCH(2)SOCH(2)CONHCH(2)Ph (L2), PhSOCH(2)CON(i)Pr(2)(L3), PhSOCH(2)CONBu(2)(L4), PhSOCH(2)CON(i)Bu(2)(L5) and PhSOCH(2)CON(C(8)H(17))(2)(L6) have been synthesized and characterized by spectroscopic methods. The selected coordination chemistry of L1, L3, and L5with [UO(2)(NO(3))(2)] and [Ce(NO(3))(3)] has been evaluated. The structures of the compounds [UO(2)(NO(3))(2)(PhSOCH(2)CON(i)Bu(2))](10) and [Ce(NO(3))(3)(PhSOCH(2)CONBu(2))(2)](12) have been determined by single crystal X-ray diffraction methods. Preliminary extraction studies of ligand L6 with U(VI), Pu(IV) and Am(III) in tracer level showed an appreciable extraction for U(VI) and Pu(IV) in up to 10 M HNO(3) but not for Am(III). Thermal studies on compounds 8 and 10 in air revealed that the ligands can be destroyed completely on incineration. The electron spray mass spectra of compounds 8 and 10 in acetone show that extensive ligand distribution reactions occur in solution to give a mixture of products with ligand to metal ratios of 1: 1 and 2 :1. However, 10 retains its solid state structure in CH(2)Cl(2). PMID:15510283

Kannan, Shanmugaperumal; Chetty, Kuna Venugopal; Venugopal, Venkatarama; Drew, Michael G B




Microsoft Academic Search

RIASSUNTO Scopo del lavoro è stato determinare l'effetto dell 'insilato di mais rispetto al fieno, come principal e componente della dieta, sul tenore azotato urinario. Secondo u n piano sperimentale a cross over 2x2, 14 bovine di razza Frisona (212±99 gg. lattazione e 26.7±5.9 kg latte\\/ d) sono state alimentate con due diete isoenergetic he, isoproteiche e isofibrose. Dopo tre


Debate: Does genetic information in humans help us treat patients? PRO--genetic information in humans helps us treat patients. CON--genetic information does not help at all.  


PRO: In the past decade, genotyping has started to help the neurologic practitioner treat patients with three types of epilepsy causing mutations, namely (1) SCN1A, a sodium channel gene mutated in Dravet's sporadic severe myoclonic epilepsy of infancy (SMEI and SMEB); (2) laforin (dual specificity protein phosphatase) and malin (ubiquitin E3 ligase) in Lafora progressive myoclonic epilepsy (PME); and (3) cystatin B in Unverricht-Lundborg type of PME. Laforin, malin, and cystatin B are non-ion channel gene mutations that cause PME. Genotyping ensures accurate diagnosis, helps treatment and genetic counseling, psychological and social help for patients and families, and directs families to organizations devoted to finding cures for specific epilepsy diseases. In SCN1A and cystatin B mutations, treatment with sodium channel blockers (phenytoin, carbamazepine, oxcarbazepine, lamotrigine) should be avoided. Because of early and correct diagnosis by genotyping of SCN1A mutations, the avoidance of sodium channel blockers, and aggressive treatment of prolonged convulsive status, there is hope that Dravet's syndrome may not be as severe as observed in all past reports. Genotyping also identifies nonsense mutations in Lafora PME. Nonsense mutations can be corrected by premature stop codon readthrough drugs such as gentamicin. The community practitioner together with epilepsy specialists in PME can work together and acquire gentamicin (Barton-Davis et al., 1999) for "compassionate use" in Lafora PME, a generalized lysosome multiorgan storage disorder that is invariably fatal. In Unverricht-Lundborg PME, new cohorts with genotyped cystatin B mutations have led to the chronic use of antioxidant N-acetylcysteine and combination valproate clobazam or clonazepam plus antimyoclonic drugs topiramate, zonisamide, piracetam, levetiracetam, or brivaracetam. These cohorts have minimal ataxia and no dementia, questioning whether the syndrome is truly progressive. In conclusion, not only is genotyping a prerequisite in the diagnosis of Dravet's syndrome and the progressive myoclonus epilepsies, but it also helps us choose the correct antiepileptic drugs to treat seizures in Dravet's syndrome and Unverricht-Lundborg PME. Genotyping also portends a brighter future, helping us to reassess the true course, severity, and progressive nature of Dravet's syndrome and Unverricht-Lundborg PME and helping us craft a future curative treatment for Dravet's syndrome and Lafora disease. Without the genotyping diagnosis of epilepsy causing mutations we are stuck with imprecise diagnosis and symptomatic treatment of seizures. CON: Genotyping of epilepsy may help to better understand the genetics of epilepsy, to establish an etiology in a patient with epilepsy, to provide genetic counseling, and to confirm a clinical diagnosis. However, critical analysis reveals that genotyping does not contribute to an improved treatment for the patients. In order to improve treatment, genotyping would have to (1) improve our ability to select the drug of choice for a given epilepsy or epileptic syndrome; (2) improve our ability to predict the individual risk of adverse reactions to certain drugs; (3) improve our ability to avoid unnecessary treatments or treatments that could aggravate seizures. Many example illustrate the lack of impact of genetic information on the treatment outcome: we do not treat Dravet syndrome more successfully since SCN1A testing became available; we do not treat Lafora disease more successfully since testing for laforin and malin became available; we do not need to know the genetic nature of Unverricht-Lundborg disease or test for the cystatin B mutation in order to select or avoid certain drugs; we do not treat Rett syndrome more successfully since MECP2 testing became available; we do not treat JME more successfully since we know its genetic origin; we do not treat autosomal dominant nocturnal frontal lobe epilepsy more successfully since we know its genetic origin and can test for its mutation. The clinical characteristics as well as the

Delgado-Escueta, Antonio V; Bourgeois, Blaise F D



The nature of the Ailao Shan-Red River (ASRR) shear zone: Constraints from structural, microstructural and fabric analyses of metamorphic rocks from the Diancang Shan, Ailao Shan and Day Nui Con Voi massifs  

NASA Astrophysics Data System (ADS)

The structural geology, timing of shearing, and tectonic implications of the ASRR shear zone, one of the most striking lineaments in Southeast Asia, have been the topics of extensive studies over the past few decades. The Xuelong Shan (XLS), Diancang Shan (DCS), Ailao Shan (ALS) and Day Nui Con Voi (DNCV) metamorphic massifs along the shear zone have preserved important information on its structural and tectonic evolution. Our field structural analysis, detailed microstructural and fabric analysis, as well as the quartz, sillimanite and garnet fabric studies of the sheared rocks from the massifs demonstrate the dominant roles of three deformation episodes during Cenozoic tectonic evolution in the shear zone. Among the contrasting structural and microstructural associations in the shear zone, D2 structures, which were formed at the brittle to ductile transition during large-scale left-lateral shearing in the second deformation episode, predominate over the structural styles of the other two deformation episodes. Discrete micro-shear zones with intensive grain size reduction compose the characteristic structural style of D2 deformation. In addition, several types of folds (early shearing folds, F21, and late-shearing folds, F22) were formed in the sheared rocks, including discrete to distributed mylonitic foliation, stretching lineation and shear fabrics (e.g., mica fish, domino structures, as well as sigma and delta fabrics). A sequence of microstructures from syn-kinematic magmatic flow, high-temperature solid-state deformation, to brittle-ductile shearing is well-preserved in the syn-kinematic leucocratic intrusions. Deformation structures from the first episode (D1) are characterized by F1 folds and distributed foliations (S1) in rocks due to pure shearing at high temperatures. They are preserved in weakly sheared (D2) rocks along the eastern margin of the ALS belt or in certain low-strain tectonic enclaves within the shear zone. Furthermore, semi-brittle deformation structures, such as hot striae and discrete retrogression zones, are attributed to normal-slip shearing in the third deformation episode (D3), which was probably locally active, along the eastern flank of the DCS range, for example.There are four quartz c-axis fabric patterns in the mylonitic rocks, including type A point maxima, type B Y point maxima with crossed girdles superimposition, type C quadrant maxima, as well as type D point and quadrant maxima combination. They are consistent with microscopic observations of microstructures of high-temperature pure shearing, low-temperature simple shearing and their superimposition. Integrated microstructural analysis and fabric thermometer studies provide information on both high temperature (up to 750 °C) and dominant low-temperature (300-600 °C) deformations of quartz grains in different rock types. Sillimanite and garnet fabrics, especially the latter, were primarily formed at the peak metamorphism during high-temperature pure shearing.The above structural, microstructural and fabric associations were generated in the tectonic framework of the Indian-Eurasian collision. The low-temperature microstructures and fabrics are attributed to left-lateral shearing along the ASRR shear zone from 27 to 21 Ma during the southeastward extrusion of the Indochina block, which postdated high-temperature deformation at the peak metamorphism during the collision.

Liu, Junlai; Tang, Yuan; Tran, My-Dung; Cao, Shuyun; Zhao, Li; Zhang, Zhaochong; Zhao, Zhidan; Chen, Wen




Microsoft Academic Search

SUMMARY Background: Depression is the most frequent mental disorder in the world; its overall prevalence is about 8-12%. In Mexico, it has been calculated that 8.3% of the population aged 18-64 years has suffered this disorder along their lifetime. Disregarding country or culture, depression is two to three times more frequent in women than in men, more usual among separated

Jaime López Rodríguez; Marco Antonio; López Butrón; Blanca Estela; Vargas Terrez; Valerio Villamil Salcedo



Proteins that fuse and fragment mitochondria in apoptosis: con-fissing a deadly con-fusion?  


During apoptosis, mitochondria undergo multiple changes that culminate in the release of cytochrome c and other proapoptotic cofactors. Recently, a role for previously overlooked morphological changes, fission of the mitochondrial reticulum and remodeling of mitochondrial cristae, has been suggested in mammalian cells and in developmental apoptosis of C. elegans. Mitochondrial morphology is determined by fusion and fission processes, controlled by a growing set of "mitochondria-shaping" proteins, whose levels and function appear to regulate the mitochondrial pathways of cell death. Expression of pro-fusion proteins, as well as of inhibition of pro-fission molecules reduces apoptosis, suggesting a linear relationship between fragmentation and death. Mechanisms by which mitochondrial fragmentation promotes apoptosis and interactions between fragmentation and remodeling of the inner membrane are largely unclear. A tempting, unifying hypothesis suggests that fission is coupled to cristae remodeling to maximize cytochrome c release. PMID:16167173

Scorrano, Luca



Humectación del nylon 6.6 con tensioactivo aniónico con no-iónico y su mezcla  

Microsoft Academic Search

Dans la pratique, l’humectation est liée à\\u000al’angle de contact en équilibre du liquide (phase fluide) sur le solide (matière textile). Quand cette humectation est dynamique et que le solide se présente sous forme de fibre ou de mono-filament et, par conséquent, avec une incurvation de la\\u000asurface à humecter, il est difficile d’obtenir l’angle de contact, compte tenu de

Francisco Javier Carrión Fité



Pro and Con Discussion--Should Congress Curtail the Use of "Busing" for School Desegregation? Con  

ERIC Educational Resources Information Center

Views of advocates of busing to achieve racial desegregation in public schools are presented, including those of the U.S. Commission on Civil Rights, the NAACP, the American Civil Liberties Union, and the Joint Washington Office for Social Concern. (SF)

Congressional Digest, 1974




Microsoft Academic Search

SUMMARY In this study, the term children with special needs is used to refer to children who comprise a population at risk for various medical and psychological disorders. Studies of parenting practices compare families with children with special needs not sharing a specific disability to parents of average children. Moreover, studies usually compare white middle class mother-child pairs. It is

Marysela Díaz Romero; Edith Bolívar Reyna; Norma García Arellano




Microsoft Academic Search

Attention Deficit\\/Hyperactivity Disorder (ADD\\/ADHD) is a neuropsychiatric condition very common in the infantile population. It characterizes for the inattention presence and impulsivity and can be presented with or without hyperactivity in diverse degrees; it affects the academic achievement from each 7 to 10 patients, with a frequent comorbility dysfunctional behavior like: the Oppositional Defiant Disorder, Conduct Disorder, Learning Disabilities, Depression

María Elena; Navarro Calvillo


Comment on the paper "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" by P.M. Dinakaran, S. Kalainathan [Spectrochim. Acta A 111 (2013) 123-130].  


We argue that (trans)-4-chloro-4'-nitrostilbene is not a new organic nonlinear optical material as claimed by Dinakaran and Kalainathan [P.M. Dinakaran, S. Kalainathan, 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, Spectrochim. Acta A 111 (2013) 123-130], but instead a well-known compound whose synthesis, spectral data, single crystal structure and second harmonic generation (SHG) efficiency are well documented in the literature. The title paper is completely erroneous. PMID:24152596

Srinivasan, Bikshandarkoil R; Dhuri, Sunder N; Nadkarni, V S



New phospho-tellurite glasses with optimization of transition temperature and refractive index for hybrid microstructured optical fibers  

NASA Astrophysics Data System (ADS)

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.

Duan, Zhongchao; Tong, Hoang Tuan; Liao, Meisong; Cheng, Tonglei; Erwan, Motillon; Suzuki, Takenobu; Ohishi, Yasutake



Zero photoelastic zinc tin phosphate glass without lead oxide.  


The photoelastic constant (PEC) is evaluated for 15 zinc tin phosphate glasses in a series of xZnO-(67-x)SnO-33P(2)O(5) where x is 0-30 mol. % at 0.5-7 mol. % intervals. The phase retardation of polarized light, passing through a disk sample with applying various uniaxial loads, was measured for PEC determinations by using a frequency stabilized transverse Zeeman He-Ne laser as a polarized light source. The substitution of ZnO for SnO results in the increase of PEC from negative to positive values in the range of -1.43 and +1.45×10(-12) Pa(-1). The minimum PEC value of 0.04±0.02×10(-12) Pa(-1) was experimentally obtained in the 18.5 mol. % ZnO-48.5 mol. % SnO-33 mol. % P(2)O(5) glass. PMID:23073411

Yamamoto, Naoki; Saitoh, Akira; Takebe, Hiromichi



Investigation of Electrical Conduction in Vanadate Based Glasses  

NASA Astrophysics Data System (ADS)

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.

Barde, R. V.; Waghuley, S. A.


Anodic Oxidation of Zinc Phosphide  

NASA Astrophysics Data System (ADS)

Initial stages of a native oxidation on Zn3P2 by anodization have been investigated for the first time using 3% tartaric acid/propylene glycol electrolyte. A constant-current anodization is found to be superior to a constant-voltage anodization because of the rapid growth of the initial stage in the constant-voltage mode in view of controlling thin oxide layers. The surface composition of anodized Zn3P2 was examined by AES and XPS. The oxide layer was identified as a mixture of ZnO, P2O5, and P2O3: the increased [P2O5+P2O3]/[ZnO] ratio of ˜ 1.3 was obtained at acidic and basic pH values, whereas the composition ratio was ˜ 0.2 near a neutral pH value as a result of selective dissolution of either ZnO or POx.

Suda, Toshikazu; Murata, Yoshitada; Kurita, Shoichi



Titanium and strontium-doped phosphate glasses as vehicles for strontium ion delivery to cells.  


This study investigated the use of a Ti-containing quaternary phosphate glass system P(2)O(5)-Na(2)O-CaO-TiO(2) as a vehicle for strontium ion delivery to cells. Four glass compositions were manufactured: 0.5P(2)O(5)-0.15Na(2)O-0.05TiO(2)-(0.3 - x)CaO-xSrO (x = 0, 0.01, 0.03, and 0.05). Structural characterization revealed that sodium calcium phosphate is the dominant phase in all the glasses. Degradation studies demonstrated highly linear glass degradation, with Sr-containing glasses degrading at higher rates than the Sr-free glass. Biocompatibility studies using MG63 cells showed that the Sr-containing glasses possess excellent cell attachment and growth, particularly over short periods (~4 days). PMID:20219848

Lakhkar, Nilay; Abou Neel, Ensanya A; Salih, Vehid; Knowles, Jonathan Campbell



The Redistribution of Phosphorus in Basic Volcanic Rocks  

Microsoft Academic Search

This work presents data on phosphorus content in the central and peripheral sectors of primary jointing blocks in olivine basalts of the Baikal rift zone (Khamar-Daban Range), as well as basaltic andesite flows and dolerite sills on the Karabakh Highland of the Lesser Caucasus. The P2O5 content decrease near cracks in volcanic rocks of the Baikal rift zone is caused

S. B. Felitsyn



The geochemistry of cadmium in the phosphate-rich and organic-rich sediments of the Oulad-Abdoun and Timahdit basins (Morocco)  

Microsoft Academic Search

The geochemistry of cadmium, zinc, calcium, phosphorus, and organic carbon was studied in phosphate-rich and organic-rich Campanian to mid-Eocene sediments from the Oulad-Abdoun and Timahdit basins (Morocco). As in the case of other phosphorites and organic-rich sediments, their cadmium contents are very high relative to 'average' shale values, are not positively correlated with the P2O5 contents and only poorly related

Y. Nathan; N. Benalioulhaj; L. Prévôt; J. Lucas



Bioactivity in glass\\/PMMA composites used as drug delivery system  

Microsoft Academic Search

Gentamicin sulfate has been incorporated in composites prepared from a SiO2–CaO–P2O5 bioactive glass and polymethylmethacrylate. Data showed that these materials could be used as drug delivery system, keeping the bioactive behavior of the glass. The composites supply high doses of the antibiotic during the first hours when they are soaked in simulated body fluid (SBF). Thereafter, a slower drug release

D. Arcos; C. V. Ragel; M. Vallet-Reg??



Diffusion of phosphorus doped silica for active optical fibers  

Microsoft Academic Search

The diffusion of phosphorus in P2O5–SiO2 glass has been investigated by annealing of doped layers on the inner surface of quartz glass tubes between 1700°C and 2000°C and measuring radial phosphorus profiles by X-ray microprobe analysis and refractive index profiling, respectively, subsequent to the tube collapse. By comparison with calculated profiles, diffusion coefficients could be determined, which are fitted by

J. Kirchhof; S. Unger; J. Dellith



Tetracalcium phosphate: Synthesis, properties and biomedical applications  

Microsoft Academic Search

Monoclinic tetracalcium phosphate (TTCP, Ca4(PO4)2O), also known by the mineral name hilgenstockite, is formed in the (CaO–P2O5) system at temperatures>1300°C. TTCP is the only calcium phosphate with a Ca\\/P ratio greater than hydroxyapatite (HA). It appears as a by-product in plasma-sprayed HA coatings and shows moderate reactivity and concurrent solubility when combined with acidic calcium phosphates such as dicalcium phosphate

C. Moseke; U. Gbureck



Comparison of Broiler Poultry Litter and Commercial Fertilizer for Coastal Bermudagrass Production in the Southeastern US  

Microsoft Academic Search

Animal waste, such as broiler (Gallus gallus domesticus) litter, may be an economical alternative to commercial fertilizer for forage producers as the number of confined animal feeding operations increases and commercial fertilizer prices rise. Four levels of commercial fertilizer (N-P2O5-K2O ratio of 3-1-2) were compared with 4 or 8 tons of broiler litter\\/acre applied in a single or split application

G. W. Evers



Study of corrosion erosion behaviour of stainless alloys in industrial phosphoric acid medium  

Microsoft Academic Search

The corrosion and corrosion-abrasion resistance of some stainless steels in industrial phosphoric acid 30% P2O5 has been studied using electrochemical techniques. The corrosion rate of materials increases with the increase of temperature. Alloys which contain chromium, molybdenum and nitrogen in sufficient quantities present the best behaviour. In the abrasion-corrosion conditions, the experimental device set up allowed to follow continually samples

Abdellah Guenbour; Mohamed-Adil Hajji; El Miloudi Jallouli; Ali Ben Bachir



Study of corrosion–erosion behaviour of stainless alloys in industrial phosphoric acid medium  

Microsoft Academic Search

The corrosion and corrosion-abrasion resistance of some stainless steels in industrial phosphoric acid 30% P2O5 has been studied using electrochemical techniques. The corrosion rate of materials increases with the increase of temperature. Alloys which contain chromium, molybdenum and nitrogen in sufficient quantities present the best behaviour.In the abrasion-corrosion conditions, the experimental device set up allowed to follow continually samples electrochemical

Abdellah Guenbour; Mohamed-Adil Hajji; El Miloudi Jallouli; Ali Ben Bachir



Physico–chemical behaviour of V(V) in a concentrated phosphoric acid  

Microsoft Academic Search

Tests show that the conductivity and viscosity of solutions of phosphoric acid (54% P2O5) change as increasing quantities of vanadium are added, indicating that the metallic cation interacts with the phosphoric acid molecule. This behaviour is confirmed by measurements of acidity. Determination of R0(H) shows that the acidity of the environment increases as a function of the concentration of V(V),

N. Sefiani; M. Azzi; N. Saib; M. Hlaibi; T. M. Ouazzani; A. Kossair



Anion and cation chemistry of phosphoryl chloride as an electron scavenger in a fuel-rich, methane--oxygen flame  

NASA Astrophysics Data System (ADS)

A premixed, fuel-rich, methane--oxygen flame at atmospheric pressure was doped with 0.05 mol. % of phosphoryl chloride, POCl3. The phosphorus anions and cations produced by chemical ionization were observed by sampling the flame through a nozzle into a mass spectrometer. The POCl3 additive was a very effective scavenger of free electrons by negative ion formation in the burnt gas of the hydrocarbon flame, even more so than trimethylphosphate, TMP, studied previously under similar conditions. The kinetic breakdown of POCl3 is faster, yielding the major anions PO-2 and PO-2; the role of electronegative chlorine is relatively minor. To a remarkable degree, the ion chemistry observed with both additives is very similar, stemming from a common series of neutral phosphorus intermediates. In addition to PO-2 and PO-3, common anions include PO-, PO2(OH)-2 and PO2(CH2)-; common cations have the general form PO+n · xH2O(n=1-3, x=0-3). New phosphorus anions observed with POCl3 include: PO2(OH)(CH3)-; the disphosphorus species P2O5H-, P2O5CH-3, P2O5 · OH- and P2O5H- · H2O; and the chlorinated anions POx(OH)yCl-z formed by nucleophilic substitution of POCl3, as well as Cl-. New cations include POCl3 · H+ and the series PO+4, PO+5 · H2O, showing the extraordinary affinity of phosphorus for oxygen. The ion chemistry is discussed in detail, mainly involving proton transfer, nucleophilic substitution (SN2) and three-body association (e.g. hydration).

Hugh Horton, J.; Crovisier, Pierre N.; Goodings, John M.



Effects of water immersion on mechanical properties of new esthetic orthodontic wire  

Microsoft Academic Search

New fiber-reinforced plastic orthodontic wire (FRP wire) was fabricated with polymethyl methacrylate (PMMA) for the matrix and biocompatible CaO-P2O5-SiO2-Al2O3 (CPSA) glass fibers for fibers that have not only high esthetics but also mechanical properties similar to those of metal wires. The purpose of this study was to evaluate the effects of water immersion on the mechanical properties of this new

Tohru Imai; Fumio Watari; Shuichi Yamagata; Masahiro Kobayashi; Kazunori Nagayama; Shinji Nakamura



Controlled-release fertilizers to increase efficiency of nutrient use and minimize environmental degradation - A review  

Microsoft Academic Search

Total world consumption of fertilizer N, P2O5, and K2O in 1990\\/1991 was 78, 37, and 26 million tons per annum, respectively, with a projected yearly increase of demand of about\\u000a 2 to 3%. Trends in crop production (maize and wheat) in the last four decades show that N application rates increased about\\u000a 15 times whereas its accumulation in grain increased

A. Shaviv; R. L. Mikkelsen



A quantitative study of the sintering and mechanical properties of hydroxyapatite\\/phosphate glass composites  

Microsoft Academic Search

Previous work has shown that small additions of a phosphate glass (CaO–P2O5) can significantly enhance the sinterability and strength of hydroxyapatite. However, there are no quantitative phase analyses available for these materials which would provide indicators of biocompatibility and resorbability. Similarly, there is little information available about the mechanical properties, especially with high glass additions. In this study, the effects

D. C Tancred; B. A. O McCormack; A. J Carr



Sol-Gel Coatings on 316L Steel for Clinical Applications  

Microsoft Academic Search

SiO2 and SiO2-CaO-P2O5 coatings have been prepared by dipping electropolished stainless steel 316L samples and microscope glass slides in three different sol-gel solutions. Multilayered dense SiO2 coatings, and thick silica films obtained from equimolar contents of TEOS and MTES were used. The latter were able to strongly reduce both the corrosion attack on the steel and the iron diffusion to

Pablo Galliano; Juan José De Damborenea; M Jesús Pascual; Alicia Durán



Ionic Ckonductivity and Glass Transition of Phosphoric Acids  

SciTech Connect

Here we report the low-temperature dielectric and viscoelastic properties of phosphoric acids in the range of H2O:P2O5 1.5 5. Both dielectric and viscosity measurements allow us to determine the glass-transition temperatures of phosphoric acids. The obtained glass-transition temperatures are in good agreement with previous differential scanning calorimetric measurements. Moreover, our analysis reveals moderate decoupling of ionic conductivity from structural relaxation in the vicinity of the glass transition.

Wang, Yangyang [ORNL; Lane, Nathan A [ORNL; Sun, Che-Nan [Oak Ridge National Laboratory (ORNL); Fan, Fei [ORNL; Zawodzinski, Thomas [University of Tennessee, Knoxville (UTK); Sokolov, Alexei P [ORNL



Ionic conductivity and glass transition of phosphoric acids  

SciTech Connect

Here we report the low-temperature dielectric and viscoelastic properties of phosphoric acids in the range of H2O:P2O5 1.5 5. Both dielectric and viscosity measurements allow us to determine the glass-transition temperatures of phosphoric acids. The obtained glass-transition temperatures are in good agreement with previous differential scanning calorimetric measurements. Moreover, our analysis reveals moderate decoupling of ionic conductivity from structural relaxation in the vicinity of the glass transition.

Wang, Yangyang [Oak Ridge National Laboratory (ORNL)] [Oak Ridge National Laboratory (ORNL); Lane, Nathan A [ORNL] [ORNL; Sun, Che-Nan [Oak Ridge National Laboratory (ORNL)] [Oak Ridge National Laboratory (ORNL); Fan, Fei [ORNL] [ORNL; Zawodzinski, Thomas [University of Tennessee, Knoxville (UTK)] [University of Tennessee, Knoxville (UTK); Sokolov, Alexei P [ORNL] [ORNL



Effects of nucleating agents on diopside crystallization in new glass-ceramics for tile-glaze application  

Microsoft Academic Search

The effect of crystallization produced by addition of TiO2, ZrO2 and P2O5 oxides to glass-ceramic of the system CaO-MgO-SiO2 was studied using structural and thermal techniques. The devitrification process was independent of thermal treatment. X-ray diffraction studies performed on the glass-ceramic system indicated that diopside crystalline phase was more thermodynamically favourable than other phases. The effect of the nucleating agent

G. Baldi; E. Generali; C. Leonelli; T. Manfredini; G. C. Pellacani; C. Siligardi



Cathode properties of amorphous and crystalline FePO 4  

Microsoft Academic Search

FePO4 is an attractive rare-metal-free cathode active material. Simple and inexpensive new synthesis routes obtained from solution were investigated. P2O5 and Fe metal powders, both of which react in water at room temperature, were selected as inexpensive starting materials. Amorphous powders obtained through ball milling were annealed at various temperatures (100–650°C) in air. IR spectra showed that PO4 tetrahedra units

Shigeto Okada; Takafumi Yamamoto; Yasunori Okazaki; Jun-ichi Yamaki; Masahiro Tokunaga; Tetsuaki Nishida



Methylene blue adsorption by the waste of Abu-Tartour phosphate rock  

Microsoft Academic Search

Phosphate rock (PR) is an abundant ore and represents the basic raw material for the phosphatic fertilizer industry. Prior to industrial processing, PR is concentrated by grinding-and-screening to separate a fine fraction that is very poor in P2O5. This fine fraction is a solid waste and represents a disposal problem. The present study shows that the fine fraction of ground-and-screened

Gihan F. Malash; Mohammad I. El-Khaiary



Vitreous tin oxide-based thin film electrodes for Li-ion micro-batteries  

Microsoft Academic Search

Sputter deposited thin films from a Sn\\/(SnO)(B2O3)0.3(P2O5)0.2 composite target are investigated as an alternative to the lithium metal anode for lithium-ion micro-batteries. Experimental conditions related to the manufacturing of the target and elaboration of the vitreous thin films are described. Chemical and physical properties of the thin layer films are presented. Regarding the electrochemical behavior, vitreous tin oxide-based thin films

C Branci; N Benjelloun; J Sarradin; M Ribes



Color formation due to non-enzymatic browning in amorphous, glassy, anhydrous, model systems  

Microsoft Academic Search

Polymeric matrix model systems (gelatinized starch, maltodextrin and polyvinylpyrrolidone (PVP) MW 40?000) containing a low concentration of added Maillard's reactants (glucose and l-lysine) were freeze dried, further desiccated (P2O5) to `zero' % moisture, and heated for 48h at 90°C. Under these conditions, all model systems were well below their measured glass transition temperature (Tg). Skim-milk powder samples (1.7 and 3.9%

Carolina Schebor; Mar??a del Pilar Buera; Marcus Karel; Jorge Chirife



Selective Oxidation of Isobutane to Methacrylic Acid over Supported V-Mo-P Based Composite Oxide Catalysts  

Microsoft Academic Search

Heteropolyacid, the most popular catalyst for the direct oxidation of isobutane, exhibits high catalytic activity, poor thermal stability and a short lifetime. Therefore, the catalyst requires further research to improve its performance. Catalysts composed of mixed oxides (V2O5, P2O5, or MoO3) sup- ported on silica were prepared by the sol-gel method to catalyze the reaction. Results of XRD, IR, and

Feifei Sun; Yunfeng Geng; Shunhe Zhong


Relative efficiency of rock phosphate and superphosphate for cowpea ( Vigna sinensis Savi) fodder  

Microsoft Academic Search

Cowpea responded well to phosphorus and P application increased green-fodder production and P uptake. With respect to green-fodder production, the rock phosphate was found to be 50–55% as effective as superphosphate. Phosphorus when applied at 50 kg P2O5\\/ha as superphosphate or rock phosphate almost doubled the P uptake by the summer-season crop of cowpea as compared to no phosphorus control.

Shankar Maloth; Rajendra Prasad



Bioactive glass-polymer materials for controlled release of ibuprofen  

Microsoft Academic Search

The ibuprofen (IB) release from samples composed by SiO2–CaO–P2O5 bioactive glass, poly-L-lactic acid (PLA), and polymethylmethacrylate (PMMA) has been studied. Data showed a fast anti-inflammatory drug release during the first 8h when these polyphasic materials are soaked in simulated body fluid (SBF). The analysis of the samples before and after different soaking periods in SBF demonstrates the growth of an

S. Ladrón de Guevara-Fernández; C. V. Ragel; M. Vallet-Reg??



Preparation and in vitro bioactivity of hydroxyapatite\\/solgel glass biphasic material  

Microsoft Academic Search

Hydroxyapatite\\/solgel glass biphasic material has been obtained in order to improve the bioactivity of the hydroxyapatite (OHAp). A mixture of stoichiometric OHAp and the precursor gel of a solgel glass, with nominal composition in mol% CaO-26, SiO2-70, P2O5-4, has been prepared. The amounts of components used have been selected to obtain a final relationship for OHAp\\/solgel glass of 60\\/40 on

C. V. Ragel; M. Vallet-Reg??; L. M. Rodr??guez-Lorenzo



Antimicrobial Effect of Nanometric Bioactive Glass 45S5  

Microsoft Academic Search

Most recent advances in nanomaterials fabrication have given access to complex materials such as SiO2-Na2O-CaO-P2O5 bioactive glasses in the form of amorphous nanoparticles of 20-to 60-nm size. The clinically interesting antimicrobial properties of commercially available, micron-sized bioactive glass 45S5 have been attributed to the continuous liberation of alkaline species during application. Here, we tested the hypothesis that, based on its

T. Waltimo; T. J. Brunner; M. Vollenweider; W. J. Stark; M. Zehnder



Solvent-Free, Cross-Aldol Condensation Reaction Using Silica-Supported, Phosphorus-Containing Reagents Leading to ?,??Bis(arylidene)cycloalkanones  

Microsoft Academic Search

This article describes an efficient, simple, and clean method for the synthesis of ?,??-bis(arylidene, furylidene and cinnamylidene)cycloalkanones under solvent-free conditions. The cross-aldol condensation of cycloalkanones with aldehydes in the presence of silica-supported phosphorus pentoxide (P2O5\\/SiO2) or silicaphosphinoxide (silphox, [POCl3-n(SiO2)n]) as heterogeneous reagents produces the title compounds in good to excellent yields.

Alireza Hasaninejad; Abdolkarim Zare; Laleh Balooty; Hadis Mehregan; Mohsen Shekouhy



Synthesis and study of triboengineering characteristics of a new nanosize ceramic nickel phosphoromolybdate additive to greases  

Microsoft Academic Search

The work is devoted to investigation of the mechanism of secondary surface structures formed at the nanolevel and their study\\u000a during frictional contact between solids separated by a lubricant film containing nanosize ceramic matter. The results of\\u000a study of the NiO-P2O5-MoO3 system diagram are presented. The formation of nickel phosphoromolybdate is shown to occur in the system and its structure

V. I. Kolesnikov; S. F. Ermakov; F. Daniel; M. A. Savenkova; N. A. Myasnikova; E. I. Luneva



Fertilization and irrigation of potatoes in Virginia  

Microsoft Academic Search

Summary  This study was conducted for ten years in the coastal plain of Virginia to determine the optimum fertilizer rate for Irish\\u000a potatoes with and without irrigation. The results from this work do not indicate a need for additional fertilizer where irrigation\\u000a is used, above the general recommendation of 100 pounds per acre of N, P2O5 and K2O. The results indicate

E. M. Dunton



The geochemical study of fluvio-lacustrine aquifers in the Kathmandu Basin (Nepal) and the implications for the mobilization of arsenic  

Microsoft Academic Search

The geochemical analyses of fluvial-lacustrine aquifer sediments of the Kathmandu Valley have been made as a step in assessing\\u000a the environment for the mobilization of arsenic in groundwater. Elements measured by X-ray fluorescence (XRF) include 4 major\\u000a oxides (Fe2O3, TiO2, CaO, P2O5) and 14 trace elements (As, Pb, Zn, Cu, Ni, Cr, V, Sr, Y, Nb, Zr, Th, Sc and

Jaya K. Gurung; Hiroaki Ishiga; Mohan S. Khadka; Nav R. Shrestha



Relaxation nuclear magnetic resonance imaging (R-NMRI) of PDMS\\/PDPS siloxane copolymer desiccation  

Microsoft Academic Search

Relaxation nuclear magnetic resonance imaging (R-NMRI) was employed to study the effects of desiccation on SiO2-filled and unfilled polydimethylsiloxane–polydiphenylsiloxane (PDMS\\/PDPS) copolymers. Uniform NMR spin–spin relaxation time (T2) profiles were observed across the sample thickness indicating that the drying process is approximately uniform, and that the desiccation of the silicone copolymer is not a H2O diffusion limited process. In a P2O5

B. R. Cherry; T. M. Alam



Experiments on Fertilization of Sport-Fish Ponds  

Microsoft Academic Search

Four fertilizer application intervals (1 d, 1 week, 2 weeks, and 4 weeks) were established in sunfish (Centrarchidae) ponds. All ponds received the same total amount of liquid fertilizer of a grade 11-37-0 (%N-%P2O5-%K2O) during the study. Fertilization at 4-week intervals was as effective in promoting sunfish production as fertilization at shorter intervals. Phosphate-only fertilization was as efficient as fertilization

Areena Murad; Claude E. Boyd



Production of high-quality liquid fertilizers from wet-process acid via urea phosphate  

Microsoft Academic Search

A pilot-plant process is described that purifies wet-process phosphoric acid for the production of a high-quality urea-ammonium polyphosphate base solution. An intermediate product, crystalline urea phosphate, is produced from urea and merchant-grade (54% P2O5) wet-process phosphoric acid. The urea phosphate crystals contain only about 15 to 20% of the objectionable impurities (iron, aluminum, and magnesium) originally contained in the feed

C. A. Hodge; T. W. Motes



Phytoplankton Response to Liquid Fertilizers  

Microsoft Academic Search

A liquid fertilizer (Poly N; Allied Chemical Corportion) with an N:P2O5:K2O ratio of 10-34-0 and a granular fertilizer (fish pond fertilizer, 20-20-5) were applied to fish ponds. Poly N at 6.6 kg\\/ha per application and fish pond fertilizer at 45 kg\\/ha per application were both effective in promoting phytoplankton growth in sportfish ponds. Nutrient inputs were much lower with Poly

Robert G. Davidson; Claude E. Boyd



Fiber-microsphere laser with a submicrometer sol-gel silica glass layer codoped with erbium, aluminum, and phosphorus  

NASA Astrophysics Data System (ADS)

Lasing of a taper-microsphere system with a gain layer of submicrometer thickness is demonstrated. For the gain layer, an Er3+-doped P2O5-Al2O3-SiO2 thin film with a thickness of 200 nm was fabricated using the sol-gel method on a silica microsphere. The demonstration of single-mode lasing with the thin gain layer suggests the improved dispersion of Er ions in the P codoped gain layer.

Takashima, Hideaki; Fujiwara, Hideki; Takeuchi, Shigeki; Sasaki, Keiji; Takahashi, Masahide



Preliminary investigations on available and potentially available phosphorus using electro-ultrafiltration (EUF)  

Microsoft Academic Search

Summary  Preliminary investigations were carried out on calcareous silty loam (clay content 25%, pH 8.0) at the Cotton Research Institute,\\u000a Multan to determine the solubility and desorption rates of phosphorus at various soil depths throughout the cotton growing\\u000a season using the EUF technique. The treatments included two applications of single superphosphate, equivalent to 0, 75, 150,\\u000a 250 and 350 kg P2O5\\/ha.

M. A. Taha; M. N. Malik; M. I. Makhdum; F. I. Chaudhry



Effective formulations for the preparation of calcium phosphate bone cements  

Microsoft Academic Search

In the system CaO-P2O5-H2O 13 different solids with varying Ca\\/P ratios are known. In addition calcium phosphates containing other biocompatible constituents like Na, or K, or Mg or Cl or carbonate, are known. Therefore, a large number of combinations of such compounds is possible which might result in the formation of calcium phosphate cements upon mixing with water. However, the

F. C. M. Driessens; M. G. Boltong; O. Bermúdez; J. A. Planell; M. P. Ginebra; E. Fernández



Liquid crystalline solutions of cellulose acetate in phosphoric acid  

Microsoft Academic Search

The influence has been studied of both the acid strength of phosphoric acid and the degree of substitution of cellulose acetate on the formation of an anisotropic phase. The solvent composition is expressed as a P2O5 concentration. It was found that the clearing temperature increases strongly with decreasing amount of water in the solvent.The influence of the degree of substitution

H Boerstoel; H Maatman; S. J Picken; R Remmers; J. B Westerink



Liquid crystalline solutions of cellulose in phosphoric acid  

Microsoft Academic Search

It was found that anhydrous phosphoric acid is an excellent direct solvent for cellulose. Dissolution is very fast, and liquid crystalline solutions are formed above a cellulose concentration of 7.5% (w\\/w) at room temperature; even solutions containing 38% (w\\/w) cellulose can be prepared. The composition of the solvent is expressed in a P2O5 concentration. Anhydrous conditions are obtained above a

H. Boerstoel; H. Maatman; J. B. Westerink; B. M. Koenders



Bioactive Glass-Ceramic Coatings Synthesized by the Liquid Precursor Plasma Spraying Process  

Microsoft Academic Search

In this study, the liquid precursor plasma spraying process was used to manufacture P2O5-Na2O-CaO-SiO2 bioactive glass-ceramic coatings (BGCCs), where sol and suspension were used as feedstocks for plasma spraying. The effect\\u000a of precursor and spray parameters on the formation and crystallinity of BGCCs was systematically studied. The results indicated\\u000a that coatings with higher crystallinity were obtained using the sol precursor,

Yanfeng Xiao; Lei Song; Xiaoguang Liu; Yi Huang; Tao Huang; Jiyong Chen; Yao Wu; Fang Wu



Physical Properties of Potassium Phosphate Glass Prepared by Sol Gel Method  

Microsoft Academic Search

Series of glasses based on Al2O3-K2O-P2O5 have successfully been made by sol gel method. The amorphous state has been confirmed by X-ray diffraction (XRD) while the actual composition has been determined using Energy Dispersive X-ray (EDX) analysis. The glass density is determined using Archimedes method while the Vickers Micro hardness Test has been used to measure the hardness. It is

Noorhidayah Che Mat; Safwan Ahmad Pauzi



Structural features of lead iron phosphate glasses  

Microsoft Academic Search

Lead iron–phosphate glasses were investigated for use as wasteform because of their improved chemical durability. There is a controversy if lead should or should not be used in iron phosphate glasses, and on the role of Fe in the inhibition of corrosion. The structure of the 43.3PbO·13.7Fe2O3·43P2O5 (mol%) glass, which has a dissolution rate in aqueous solution at 90 °C

S. T. Reis; D. L. A. Faria; J. R. Martinelli; W. M. Pontuschka; D. E. Day; C. S. M. Partiti



An XPS study of oxygen bonding in zinc phosphate and zinc borophosphate glasses  

Microsoft Academic Search

X-ray photoelectron spectroscopy has been used to determine oxygen bonding in a series of xZnO · (1 ? x)P2O5 (0.50 ? x ? 0.67) glasses. Curve fitting of the O 1s spectra leads to a quantitative measure of the bridging-to-non-bridging oxygen ratio which is shown to depend on composition according to a simple structural depolymerization model. A third peak, present

Richard K. Brow



Chemical durability and structure of zinc–iron phosphate glasses  

Microsoft Academic Search

The chemical durability of zinc–iron phosphate glasses with the general composition (40?x)ZnO–xFe2O3–60P2O5 has been measured. The chemical durability and density of these glasses increase with increasing Fe2O3 content. Glasses containing more than 30 mol% Fe2O3 had an excellent chemical durability. The dissolution rate (DR), calculated from the weight loss in distilled water at 90 °C for up to 32 days,

S. T Reis; M Karabulut; D. E Day



Exploratory investigations on the chemistry and technology of fertilizers and salts  

Microsoft Academic Search

Summary From this review of exploratory work we can 1) decide to some extent which results of the exploratory work deserve further development and utilization, and 2) arrive at some general views concerning the development of the exploratory investigations.1.Subjects that require further development and later, possibly, exploitation under manufacturing conditions include: thermal dissociation of calcium phosphates with formation of P2O5;

S. I. Volfkovich



Liming and Fertilization Effects on Triticale (XTriticosecale W.) Yield Between 1999 and 2006  

Microsoft Academic Search

Precipitation amount, distribution and nitrogen (N)-, phosphorus (P2O5)-, potassium (K2O)-, calcium (CaO)-, and magnesium (MgO) fertilization interaction effects were studied on a sandy acidic lessivated brown forest soil; WRB: Haplic Luvisol in the 44 year old Nyírlugos Field Trial (NYFT) in a Hungarian fragile agro-ecosystem in Nyírség region (N: 470 41' 60'' and E: 220 2' 80'') on triticale (X



Alteration of basaltic glass: Mechanisms and significance for the oceanic crust-seawater budget  

Microsoft Academic Search

Alteration of basaltic glass to palagonite is characterized by a nearly isomolar exchange of SiO 2 , Al 2 O 3 , MnO, MgO, CaO, Na 2 O, P 2 O 5 , Zn, Cu, Ni, Cr, Hf, Sc, Co and REE for H 2 O and K 2 O, whilst TiO 2 and FeO are passively accumulated during removal

Hubert Staudigel; Stanley R. Hart



Ag-doped antibacterial porous materials with slow release of silver ions  

Microsoft Academic Search

The inorganic–organic hybrids of polyethyleneglycol (PEG), tetraethoxysilane (TEOS) and triethylphosphate (TEP) doped by silver ions were prepared by sol–gel method. After molding and heating at 600°C to remove organic components, porous Ag–P2O5–SiO2 monoliths were obtained. Thermogravimetry (TG), differential thermal analysis (DTA), infrared spectra, ultraviolet–visible (UV–vis) spectra and pore structure of the samples were measured to show that organic components and

Hairong Liu; Qi Chen; Li Song; Reifang Ye; Jianying Lu; Huiping Li




Microsoft Academic Search

Eighteen surface soil samples (alkaline, calcareous clay, low to high in Olsen P) belonging to Inceptiosls, Vertisols, and Entisols were collected in bulk. Five kg soil (<2 mm) was placed in plastic pots. Four levels of P2O5 (0, 50, 100 and 150 kgha) with constant rates of N and K2O @ 200 and 100 kgha respectively were applied. Wheat (cv. HD 2189) was

Kashinath R. Sonar; Chandrakant R. Palwe



Crystal nucleation and growth in glasses from inorganic wastes from urban incineration  

Microsoft Academic Search

This paper reports the results of a study of the feasibility of recycling the fly ashes from domiciliary waste incineration by producing glasses and glass–ceramics. The major components of the fly ashes, Tyseley (F+L) and Tyseley (F), which were from a British domiciliary incinerator, were CaO, SiO2 and Al2O3 but nucleating agents, such as TiO2, P2O5 and Fe2O3, were also

M. Romero; R. D Rawlings; J. Ma Rincón



Effect of ternary phosphate-based glass compositions on osteoblast and osteoblast-like proliferation, differentiation and death in vitro  

Microsoft Academic Search

There is currently a need to expand the range of graft materials available to orthopaedic surgeons. This study investigated the effect of ternary phosphate-based glass (PBG) compositions on the behaviour of osteoblast and osteoblast-like cells. PBGs of the formula (in mol.%) P2O5(50)–CaO(50?X)–Na2O(X), where X is either 2, 4, 6, 8 or 10, were produced and their influence on the proliferation,

K. L. Skelton; J. V. Glenn; S. A. Clarke; G. Georgiou; S. P. Valappil; J. C. Knowles; S. N. Nazhat; G. R. Jordan



Li2O Based Solid Electrolytes: Preparation and Characterization  

NASA Astrophysics Data System (ADS)

40Li2O-50V2O5-10P2O5 system has been prepared via mechanochemical milling method and sintered at 400, 500 and 550 °C. The conductivity is observed to increase with the increase of sintering temperature. The sintering process changes the conduction mechanism from predominantly ionic to mix electronic-ionic conduction as evidenced by the changes of electronic transference number, ?e and ionic transference number, ?i.

Norhaniza, R.; Subban, R. H. Y.; Mohamed, N. S.



Fosfaatverliezen in kalkloze zandgronden; vergelijking van modelberekeningen met meetgegevens voor gras en maosland  

Microsoft Academic Search

Met het model ANIMO zijn fosfaatverliezen berekend voor kalkloze zandgronden. De berekeningen zijn getoetst op gegevens van een praktijkbedrijf (grasland) en een proefbedrijf (maosland). Het model simuleerde een sterkere stijging van de fosfaattoestand dan gemeten werd. De uitspoelingsverliezen uit de bouwvoor bedroegen bij een ruim voldoende fosfaattoestand 7-10 kg P2O5 per ha per jaar. De fixatieverliezen waren volgens de berekeningen

Salm van der C; A. Breeuwsma



Degradation of methylene blue: Optimization of operating condition through a statistical technique and environmental estimate of the treated wastewater  

Microsoft Academic Search

FeOx-MoO3-P2O5 (x=1 or 1.5) composite catalyst was prepared by solid reaction method and characterized by X-ray diffraction (XRD) and X-ray Photoelectron Spectroscopy (XPS). Its catalytic activities on degradation of a heteropolyaromatic dye, methylene blue (MB), were also investigated under mild condition. In order to determine the optimum operating condition, the orthogonal experiments were devised. And the results revealed that initial

Qiongfang Zhuo; Hongzhu Ma; Bo Wang; Fang Fan



Effect of phosphorus on bacterial leaf spot disease incidence, and chemical composition and storage quality of Piper betle leaves  

Microsoft Academic Search

Biochemical analysis of betel leaves infected by leaf spot and blight caused byXanthomonas campestris pv.betlicola showed a decrease in moisture, chlorophyll, protein, phenol and total carbohydrate contents as compared with healthy leaves.\\u000a The decrease in these five parameters was 31-42%, 29-70%, 20-79%, 30-53% and 53-87%, respectively. Application of 100 kg P2O5\\/ha gave maximum height of vine, number of leaves per

A. R. Wasnikar; S. K. Khatik; M. L. Nayak; S. K. Vishwakarma; L. K. Punekar



Weight loss, ion release and initial mechanical properties of a binary calcium phosphate glass fibre\\/PCL composite  

Microsoft Academic Search

Composites comprising a biodegradable polymeric matrix and a bioactive filler show considerable promise in the field of regenerative medicine, and could potentially serve as degradable bone fracture fixation devices, depending on the properties obtained. Therefore, glass fibres from a binary calcium phosphate (50P2O5+50CaO) glass were used to reinforce polycaprolactone, at two different volume fractions (Vf). As-drawn, non-treated and heat-treated fibres

I. Ahmed; A. J. Parsons; G. Palmer; J. C. Knowles; G. S. Walker; C. D. Rudd



Sulfate content influencing methane production and emission from incubated soil and rice-planted soil in Northeast Thailand  

Microsoft Academic Search

This study was conducted using four soil treatments (0, 22.5, 45 and 90?mg??kg) with balanced amounts of nitrogen (N), phosphorus pentoxide (P2O5) and potassium oxide (K2O) for each treatment, provided using ammonium phosphate sulfate (42% of sulfate), rock phosphate, potassium chloride and urea. These treatments were employed in incubation and jar experiments to investigate methane (CH4) production, redox potential (Eh)

Sophoanrith Ro; Patcharee Seanjan; Thepparit Tulaphitak; Kazuyuki Inubushi



Organic reagents for removing heavy metals from a 10-34-0 (NP 2 O 5 -K 2 O) grade fertilizer solution and wet-process phosphoric acid  

Microsoft Academic Search

Fertilizer solutions and wet-process phosphoric acid (WPA) contain heavy metal impurities such as cadmium, zinc, lead, copper, manganese, and chromium. Trisodium trithiocyanuric acid (TMT-15), sodium trithiocarbonate (5% Na2CS3), and sodium polythiocarbonate (Thio-Red II) were evaluated as precipitating agents for heavy metals in a 10-34-0 (N-P2O5-K2O) grade fertilizer solution and WPA. A water-insoluble starch xanthate was also evaluated as an adsorbent

V. M. Norwood; J. J. Kohler



Fabrication of p-type ZnO thin films via MOCVD method by using phosphorus as dopant source  

Microsoft Academic Search

Phosphorus-doped p-type zinc oxide (ZnO) thin films have been deposited by metalorganic chemical vapor deposition without using additional thermal activation processes. In our experiment, diethylzinc (DEZ) was used as Zn precursor, and O2 gas and P2O5 powder were used as oxidizing and phosphorus doping sources, respectively. We have reached a phosphorus content in the ZnO films of about 0.38–3.91at%. The

Fugang Chen; Zhizhen Ye; Weizhong Xu; Binghui Zhao; Liping Zhu; Jianguo Lv



Effects of phosphorus doping source temperatures on fabrication and properties of p-type ZnO thin films  

Microsoft Academic Search

Phosphorus-doped p-type ZnO thin films have been deposited by metalorganic chemical vapor deposition using P2O5 as the dopant source. The conductivity types of the as-grown thin films were strongly temperature-dependent. When the substrate temperature maintains at the optimal one of 420 °C, the evaporating temperature of the phosphorus source plays significant roles in controlling the phosphorus content doping into films, then

J. Jiang; L. P. Zhu; J. R. Wang; X. Q. Gu; X. H. Pan; Y. J. Zeng; Z. Z. Ye



Interaction of salinity, nitrogen, and phosphorus fertilization on wheat  

Microsoft Academic Search

This study determined whether the application of nitrogen (N) and phosphorus (P) could ameliorate salt?induced reduction in wheat production. Saline irrigation water (0.5, 4.0, 8.2, and 12.5 dS\\/m) and N and P fertilizers (150 kg N\\/ha and 37.5 kg P2O5\\/ha) were applied to wheat (Triticum aestivum L. ‘Saka 92') grown on a calcareous soil in a greenhouse experiment. Plants received

M. S. Soliman; H. G. Shalabi; W. F. Campbell



CO2-related explosive alkaline magmatism in Gusev crater, Mars: Implications for oxygen fugacity and carbon inventory in the Noachian Martian mantle (Invited)  

Microsoft Academic Search

The Mars Exploration Rover Spirit has encountered volcanic and volcaniclastic rocks having diverse alkaline compositions in the Noachian-age (~3.8-4.5 Ga) Gusev crater. Among them, we focus on Wishstone Class tephrites which have pyroclastic textures and are unusually enriched in incompatible elements (e.g. >5 wt% P2O5) with low silica contents. The high-phosphorous tephrite signature is not attributable to secondary aqueous alteration

T. Usui; H. Y. McSween; B. C. Clark



Effects of pH adjustment with phosphates on attributes and functionalities of normal and high pH beef  

Microsoft Academic Search

Longissimus dorsi muscles from six normal- and six high-ultimate pH bulls were selected for fine mincing and subsequent pH adjustment with acid and alkaline pyrophosphate. Four pH treatments were prepared: initially high remains high (mean of pH 6.37), high becomes normal (5.62); initially normal remains normal (5.65), and normal becomes high (6.21). The addition level of phosphate as P2O5 was

O. A. Young; S. X. Zhang; M. M. Farouk; C. Podmore



Optical and luminescence properties of Nd3+ ions in K Ba Al-phosphate and fluorophosphate glasses  

NASA Astrophysics Data System (ADS)

Phosphate (PKBAN: P2O5+K2O +BaO +Al2O3+Nd2O3) and fluorophosphate (PKBFAN: P2O5+K2O +BaO +BaF2+Al2O3+Nd2O3 and PKBAFN: P2O5+K2O +BaO +Al2O3+AlF3+Nd2O3) glasses were prepared with three concentrations (0.1, 1.0 and 2.0 mol%) of Nd3+ ions and their detailed luminescence properties have been investigated. Absorption spectra for 1.0 mol% of Nd3+-doped glasses have been analysed using Judd-Ofelt (JO) theory. The observed bands in absorption spectra from ground to excited states are assigned and analysed with the parameterized free-ion Hamiltonian model. The JO parameters have been used to predict radiative properties for ^{4}\\mathrm {F}_{3 / 2} \\to {}^{4}\\mathrm {I}_{J} (J = 15/2, 13/2, 11/2 and 9/2) transitions of Nd3+ ions in these glasses. The Inokuti-Hirayama model has been applied to the non-exponential behaviour of the decay profiles to investigate the mechanism involved in the energy transfer between the donors and acceptors.

Balakrishnaiah, R.; Babu, P.; Jayasankar, C. K.; Joshi, A. S.; Speghini, A.; Bettinelli, M.



Polarizable force field development and molecular dynamics study of phosphate-based glasses  

NASA Astrophysics Data System (ADS)

Molecular dynamics simulations of phosphate-based glasses P2O5-CaO-Na2O have been carried out, using an interatomic force field that has been parameterized to reproduce the structural and mechanical properties of crystalline phosphorus pentoxide, o'(P2O5)? orthorhombic phase. Polarization effects have been included through the shell-model potential and formal charges have been used to aid transferability. A modification to the DL_POLY code (version 2.20) was used to model the high temperature shell dynamics. Structural characterizations of three biomedically applicative molar compositions, (P2O5)0.45(CaO)x(Na2O)0.55-x (x = 0.30, 0.35, and 0.40), have been undertaken. Good agreement with available experimental and ab initio data is obtained. The simulations show that, dependent on composition, the phosphorus atoms are primarily bonded to two or three oxygens that in turn bridge to neighbouring phosphorus atoms. Na+ and Ca2+ modifiers are found to occupy a pseudo-octahedral bonding environment with mean oxygen coordination numbers of 6.55 and 6.85, respectively, across all compositions studied.

Ainsworth, Richard I.; Tommaso, Devis Di; Christie, Jamieson K.; de Leeuw, Nora H.



Geographic information system based manure application plan.  


A geographic information system (GIS) based manure application plan has been developed for the site-specific application of animal waste to agricultural fields in the Westbrook sub-catchment of the Murray-Darling Basin, south-east Queensland, Australia. Sites suitable for animal waste application were identified using a GIS based weighted linear combination (WLC) model. The degree of land suitability for animal waste application was determined using a range of social, economic, environmental, and agricultural factors. As eutrophication and toxic blue-green algae blooms are a known problem in the catchment, the manure application rates were limited to the rate of crop phosphorus removal. Maximum manure application rate was calculated spatially by taking the crop nutrient (P2O5) requirement and the manure nutrient (P2O5) content into account. The environmental suitability of the fields receiving animal waste was considered in prescribing the final application rate of solid and liquid manures generated by local animal production facilities. The degree of site suitability of the agricultural fields was also used to suggest manure management practices to minimise the socio-environmental risks and increase the nutrient use efficiency of the applied manure. The amount of ammonium nitrogen (NH4-N) that would be added to the soil by satisfying the P2O5 requirement using manure sources was also calculated and an applied NH4-N map was created. This map could be used to assist farmers identify additional nitrogen requirements after manure application. PMID:11995243

Basnet, Badri B; Apan, Armando A; Raine, Steven R



Effect of N and NPK fertilizers on early field performance of narrow-leaved ash, Fraxinus angustifolia.  


The effect of fertilization in the first growing season on early survival and growth of narrow-leaved ash (NLA) (Fraxinus angustifolia ssp. oxycarpa) was evaluated throughout the first 3 years of growth in Adapazari, Turkey. A randomized complete block design with four replications was established to investigate fertilization effects. Granular N urea [46%, (NH2)2CO, NH2-N] and NPK (15/15/15%; NH3-N, P2O5, K2O) fertilizers were applied in mid-May of the first growing season. Fertilization treatments per tree were control, 67 g NPK (equal to 10/10/10 g N/P2O5 /K2O tree(-1)), 133 g NPK (20/20/20 g N/P2O5 /K2O tree(-1)), 33 g urea N (15 g N tree(-1)) and 54 g urea N (25 g N tree(-1)). After three growing seasons under these fertilizer treatments, 98% of trees were still viable. Compared to the control treatment, fertilization had a large and positive effect on diameter and height growth during the first 3 years of growth. However, since there were no significant differences among the fertilized plots in terms of tree diameter and height growth, addition of P and K to the fertilizer regime was not beneficial. The results show that N fertilization in the first growing season has the potential to improve early field growth of narrow-leaved ash. PMID:20648820

Cicek, Emrah; Yilmaz, Faruk; Yilmaz, Murat


Lead-Free Low-Melting and Semiconductive Vanadate Glass Applicable to Low-Temperature Sealing  

NASA Astrophysics Data System (ADS)

We optimized the fundamental composition and additives in a semiconducting V2O5--P2O5--TeO2 glass system to develop lead-free low-melting glass suitable for low-temperature sealing below 400 °C. Glass with a composition of 55.7V2O5--19.8P2O5--23.5TeO2 (mol %) has a low glass transformation temperature (Tg < 300 °C) as well as hard crystallization, and it is desired as a low-temperature sealing material. The effects of adding BaO, Sb2O3, MnO2, or Fe2O3 to the fundamental composition of 55.7V2O5--19.8P2O5--23.5TeO2 (mol %) on the thermal properties and water-vapor resistance were then characterized. Adding 11.7 mol % Fe2O3 improved the water-vapor resistance drastically and decreased the thermal expansion coefficient without increasing Tg. Sealing at 360 °C with our lead-free Fe2O3-added vanadate glass enabled practical airtight packaging on an electronic device.

Naito, Takashi; Aoyagi, Takuya; Sawai, Yuichi; Tachizono, Shinichi; Yoshimura, Kei; Hashiba, Yuji; Yoshimoto, Mamoru



An Interim Pricing Strategy for ConRail, February, 1975.  

National Technical Information Service (NTIS)

The study analyses the merits for the various types of short term price increases in terms of general rate increases, commodity increases, terminal surcharges, and region surcharges. An estimate of the traffic diversion under each arrangement is presented...



MichCon upgrades SCADA to meet new requirements  

SciTech Connect

This paper reviews the decision making process used by Michigan Consolidated Gas Company to upgrade the company`s supervisory control and data acquisition (SCADA) system. The original system was reviewed for performance with the results showing problems with data storage and transmission capacity, out-dated proprietary hardware and software, and the lack of expandability. The paper goes on to provide a detail of the new system and its interconnection options. It reviews the new applications associated with system control and monitoring of the gas distribution system. It also reviews network and emergency control options.

Moir, K. [Michigan Consolidated Gas Co., Detroit, MI (United States); Derviller, P. [Valmet Automation, Calgary, Alberta (Canada)



The pros and cons of evidence-based surgery  

Microsoft Academic Search

Introduction: Evidence-based medicine (EBM) has been proposed as a new paradigm of practising medicine. However, an unproductive polarisation\\u000a between supporters and opponents can make its unbiased assessment difficult. This review gives an overview of the arguments\\u000a and discusses their surgeon-specific importance. Discussion: As EBM claims a position in the centre of medicine, it borders with other highly debated topics as,

Stefan Sauerland; Rolf Lefering; Edmund A. M. Neugebauer



The pros and cons of polyethylene sterilization with gamma irradiation.  


This retrospective study evaluated the implant, patient and surgical factors associated with polyethylene wear for one type of porous-coated hemispheric total hip arthroplasty cup. Radiographic wear measurements among 567 Duraloc cups (512 patients) revealed that liners sterilized by gamma-irradiation wore 0.085 mm/year less than those that were sterilized by gas-plasma, a noncross-linking chemical surface treatment. The substantially decreased wear rate associated with gamma-irradiation was attributed to sterilization-induced polyethylene cross-linking. Shelf-aging adversely affected liners that were gamma irradiated in air. On average, highly crystalline Hylamer liners showed a 0.064 mm/year increase in wear rates for each year of shelf storage after terminal sterilization with gamma-irradiation in air. Among conventional Enduron liners, the effect of shelf aging after gamma-irradiation in air was more modest, increasing wear rates by 0.014 mm/year for each year of shelf storage. Because Hylamer's wear performance degraded at about five times the rate of Enduron's, the improved wear resistance associated with gamma-irradiation in air would be lost after 1.3 years of shelf aging for Hylamer compared with 6.1 years for Enduron. For every additional year of age at the time of surgery, the wear rate decreased by 0.003 mm/year. Increased body mass index, a preoperative diagnosis of inflammatory arthritis, and a ceramic femoral head also were associated with decreased wear rates. PMID:15577466

Hopper, Robert H; Engh, C Anderson; Fowlkes, LaTonya B; Engh, Charles A



Perforación corneal no traumática estéril tratada con Tachosil ®  

Microsoft Academic Search

Case reportAn 83 year-old male reported to the emergency room with red eye and ocular pain. The slit-lamp examination showed a central corneal perforation of 1mm in diameter, with no associated infection or inflammatory process. The patient had no history of trauma. It was decided to apply a patch of Tachosil® at the site of corneal perforation. After 36hours of

R. Cañones-Zafra; J. Benítez-Herreros; K. Kubiak; M. A. Montes-Mollón; R. Jiménez-Parras



Re(con)ceiving young children's curricular performativity  

Microsoft Academic Search

Working (with) Deleuzo?Guattarian philosophical imaginaries opens (to) a multiplicity of possibilities for thinking differently about curriculum, young children and how they perform their curricular understandings. In this article I work (as) rhizome, bringing the imaginaries becoming and milieu into an early childhood curriculum conversation towards perturbing conventional, entrenched developmental understandings of young children and their learning. It is within\\/in multiplicitous

Marg Sellers



Pros and cons of stem cell transplantation for autoimmune disease.  


The data and discussion at this symposium have provided a most useful analysis of the autoimmune diseases and their potential for therapy by stem cell transplantation. These diseases are characterized by threat to life and particularly by chronic, painful and debilitating courses that warrant aggressive therapy. Selection of patients will be difficult because of the variable disease course and the necessity to choose patients who still have reversible disease. The safety of both autologous and allogeneic stem cell grafting has progressed to the point where, in many cases, the risks of the disease far outweigh those of transplantation. In my opinion the data presented at this symposium show that we should proceed cautiously with both autologous and allogeneic stem cell grafts. Purified stem cells, which have the advantage of being free of lymphocytes, should be used for the first series of autologous studies. These studies are attractive because of the low risk of transplant related complications but are less likely to be curative. Allogeneic grafts from perfectly matched donors have the advantage of providing a completely new immunological environment. For this reason, I believe that curative results are most probable after allogeneic stem cell engraftment. Emphasis should be on the identification of patients with HLA matched siblings. Initially, these studies will be carried out in patients with advanced disease, as was the case in the early days of transplantation for leukemia. In considering more aggressive treatment for autoimmune diseases it appears there are 3 possible approaches. First, and most conservative, is to store peripheral blood stem cells for possible future marrow rescue and then to give higher doses of immunosuppressive agents, especially in combination, to see whether there is an improvement over conventional doses. Second, for those who prefer a conservative approach to stem cell transplantation, is to give myeloablative and lymphoablative chemotherapy followed by purified (lymphocyte-free) hematopoietic stem cells. Third, and most likely to be curative, is myeloablative and lymphoablative therapy followed by stem cells from an HLA matched family member with subsequent short methotrexate and cyclosporine treatment to control GVHD. As we have heard, there are differences of opinion about whether the preparative regimen should include irradiation. It should be pointed out that total body irradiation is the most effective way to destroy lymphoid cells throughout the body. Careful monitoring of accumulating clinical results will pilot future investigation. PMID:9150129

Thomas, E D



[Hematopoietic stem cell transplantation in autoimmune diseases. Pros and cons  


New therapeutics have clearly advanced our chances of inducing remission in several aggressive autoimmune diseases like rheumatoid arthritis (RA) or systemic lupus erythematosus (SLE). Despite this, subgroups of patients with RA or SLE or of other diseases like systemic sclerosis (SSc) or multiple sclerosis (MS) still present a poor response to conventional drugs. In this kind of patients, haematopoietic stem cell transplantation (HSCT) provided important clinical benefits in several studies. This might depend upon several possible mechanisms such as purging of autoreactive T cells during conditioning or changes of the TH1/TH2 biological milieu. An overview of the results obtained so far, the drawbacks and the perspectives in this field are presented. PMID:12461572

Ferraccioli, G. F.



Umbilical cord blood transplantation: pros, cons and beyond.  


Large body of clinical and scientific data has been generated since the first cord blood transplantation (CBT) was performed in 1989. Superior immune plasticity of CB grafts, that allows for less stringent HLA matching, is especially valuable in the face of a persistently growing need for unrelated donor (UD) transplants. Limited cell dose remains the main setback of CBT, particularly in adult population. New strategies, such as transplantation with two cord blood units or using non-myeloablative conditioning, have remarkably expanded the availability of CB transplants in adults with hematological malignancies. Clinical trials with in vitro expanded CB-derived stem cells are under way. Currently cord blood is considered a second best choice after matched bone marrow. However, results of recent international studies indicate that in particular clinical settings, such as in children with leukemia, CB may become a frontline hematopoietic stem cell (HSC) source for transplantation. Recent advances in understanding the unique biology of cord blood will further expand indications for its use in different settings, including those beyond hematopoietic stem cells transplantation (HSCT). PMID:19282073

Stanevsky, Anfisa; Goldstein, Gal; Nagler, Arnon



9 CFR 319.301 - Chili con carne with beans.  

Code of Federal Regulations, 2013 CFR

...Mechanically Separated (Species) may be used in accordance with § 319.6. Head meat, cheek meat, or heart meat exclusive of the heart cap may be used to the extent of 25 percent of the meat ingredients, and its presence shall be...



Pros and Cons of the Acceleration Scheme (NF-IDS)  

Microsoft Academic Search

The overall goal of the acceleration systems: large acceptance acceleration to 25 GeV and beam shaping can be accomplished by various fixed field accelerators at different stages. They involve three superconducting linacs: a single pass linear Pre-accelerator followed by a pair of multi-pass Recirculating Linear Accelerators (RLA) and finally a nonâ scaling FFAG ring. The present baseline acceleration scenario has

Alex Bogacz; Slawomir Bogacz



Mucormicosis rinocerebral: Sobrevida en un niño con leucemia  

Microsoft Academic Search

A four year old child with acute lymphoblastic leukemia and severe neutropenia secondary to chemotherapy, presented with periorbitarian cellulitis and proptosis of the right eye. Initially it was supposed to have a bacterial origin but he didn't improve with antibiotic treatment. As MRI detected a cerebritis focus, three surgical drainages and debridements were done and a nasal osseus biopsy confirmed



Los Ácidos Grasos Trans Ahora Serán Listados Junto con las ...  

Center for Food Safety and Applied Nutrition (CFSAN)

... Qué es un Ácido Graso Trans? ¿Dónde se encuentran los ácidos grasos trans? ... Seleccione un producto para una respuesta! ... More results from


The Pros and Cons of Performance-Based Compensation.  

ERIC Educational Resources Information Center

|This paper analyzes the current and historical criticism of performance-based compensation in K-12 education. It claims that new compensation methods are feasible and are necessary in order to attract and retain the best and the brightest into the teaching profession. The document outlines the objections to performance-based compensation, which…

Solmon, Lewis C.; Podgursky, Michael


Asociación de linfomas malignos con herpes virus I y II  

Microsoft Academic Search

SUMMARY Objectives: To know the prevalence of seropositivity for herpes virus I and II in patients with malignant non Hodgkin lymphoma (NHL), and the association with the cell lineage (B or T). Patients and Methods: We considered 60 new or in first recurrence patients with NHL at the Hospital Nacional Guillermo Almenara from August 1999 to December 2000. We analyzed




Tratamiento de linfomas cutáneos de células T con bexaroteno  

Microsoft Academic Search

IntroductionThe choice of treatment in cutaneous T-cell lymphomas (CTCLs) depends on the clinical stage of the disease and the patient's general condition. To date, there is no curative treatment for this disease, and the objective is to control the symptoms and prevent the disease from progressing. Bexarotene is an X receptor-specific retinoid with anti-tumor activity. Its use as treatment for

Olatz Lasa; Rosa Izu; Elvira Acebo; Patricia Eguino; José L. Díaz-Pérez




Microsoft Academic Search

The microalga Chlorella growing in the efluentes of the fishing industry, has been using with the porpuse of trating polluted waters. When it is separated with centrifugation, the clarified remainder diminishes the Biochemical Oxygen Demand (BOD) until levels of 95%. Another way of separating the algae is with chitosana (deacetylated chitin) obtained from chitina (ß-N- acetyl-D-glucosamine), product that was proven

Cristina Ferrán G


Screening MR imaging versus screening ultrasound: pros and cons.  


Data support greater sensitivity of MR imaging compared with mammography and ultrasound in high-risk populations, in particular BRCA 1 and BRCA 2 carriers. Screening ultrasound improves cancer yield versus mammography alone in high-risk patients and in patients with dense breasts and is less expensive. Drawbacks include low positive predictive value, operator dependence, and significant physician time expenditure. Advances, such as refinement of automated whole-breast ultrasound, new outcomes data from ultrasound-detected masses in BI-RADS 3 and 4a categories, and development of new MR imaging sequences that allow rapid screening, potentially without use of contrast, will likely reveal the most appropriate tool over time. PMID:23928240

Mahoney, Mary C; Newell, Mary S



Fuerza muscular máxima en atletas con discapacidad intelectual  

Microsoft Academic Search

The sports activity requires of the harmonic and fine movement, and development and maturity of central nervous system and muscle-skeletal system is very important. Children with Down syndrome seen to love sports and can be very competitive, the performance were influenced for the neurological damage and reflect in the muscular activity. In the Down’ syndrome occur because the chromosomal abnormality

Carlos Alberto Morales Salas; Kalia Lavaut Sánchez; Rosa María Lam



The Pros and Cons of Life Without Parole  

Microsoft Academic Search

The question of how societies should respond to their most serious crimes if not with the death penalty is ‘perhaps the oldest of all the issues raised by the two-century struggle in western civilization to end the death penalty’ (Bedau, 1990: 481). In this article we draw attention to the rapid and extraordinary increase in the use of ‘life imprisonment

Catherine Appleton; Bent Grøver



Útero unicorne con cuerno rudimentario no comunicante en la adolescencia  

Microsoft Academic Search

Unicornuate uterus is a rare uterine anomaly resulting from the abnormal development of one of the Müllerian ducts. This abnormality usually manifests with dysmenorrhea, dyspareunia and pelvic pain appearing a few months after menarche, although there are late or even asymptomatic presentations. Clinicians should be aware of the importance of this rare congenital anomaly of the female genital tract, especially



Minimal database for the cutting parameters in con manufacturing systems  

Microsoft Academic Search

Selection of process parameters is an important problem faced by NC programmers and CAM operators. Tool wear, cutting force and power estimates are based on several models and require a large number of coefficients. This paper describes simplified models, an algorithm and a data structure to automatically determine the cutting parameters in turning. The aim is to minimize the number




Communication Technology: Pros and Cons of Constant Connection to Work  

ERIC Educational Resources Information Center

|We examined the relationship between employees' attitudes related to communication technology (CT) flexibility, communication technology (CT) use, work-to-life conflict and work satisfaction. Based on data obtained from 193 employees, CT flexibility predicted more CT use. Further, CT use was associated not only with increased work satisfaction,…

Diaz, Ismael; Chiaburu, Dan S.; Zimmerman, Ryan D.; Boswell, Wendy R.



Going Up? The Pros and Cons of Vertical Expansion.  

ERIC Educational Resources Information Center

|Describes the advantages and disadvantages of the vertical expansion of school buildings. Considers such factors as fire protection, compliance with the Americans with Disabilities Act, and cost. Discusses alternatives to vertical expansion. (PKP)|

Myler, Patricia A.; Boggs, Richard C.



Communication Technology: Pros and Cons of Constant Connection to Work  

ERIC Educational Resources Information Center

We examined the relationship between employees' attitudes related to communication technology (CT) flexibility, communication technology (CT) use, work-to-life conflict and work satisfaction. Based on data obtained from 193 employees, CT flexibility predicted more CT use. Further, CT use was associated not only with increased work satisfaction,…

Diaz, Ismael; Chiaburu, Dan S.; Zimmerman, Ryan D.; Boswell, Wendy R.



Indici di performance neuromotoria valutati con piattaforme robotiche: osservazioni preliminari  

Microsoft Academic Search

Introduzione Lo stroke causa circa 5 milioni di vittime l'anno nel mondo, ed è la prima causa di impairment motorio. Gli approcci riabilitativi attual- mente conosciuti consistono nel recupero motorio e funzionale della disabilità motoria conseguente l'episodio ictale. Recenti ricerche in neuroscienze hanno mostrato come la plasticità neuronale stimolata dall'attività motoria è alla base del recupero neurale post-ictale; per questo




Happiness on the Political Agenda? PROS and CONS  

Microsoft Academic Search

This paper provides a critical analysis of the application of happiness research into policy domains. An overview of the current\\u000a debate on the politics of happiness is elaborated by focusing on its promising perspectives as well as the potential problems\\u000a it raises. Arguments of proponents and opponents are confronted with each other in discussing the following central issues\\u000a in the

Valérie De Prycker



Pros and Cons of TQM for Student Affairs.  

ERIC Educational Resources Information Center

|Explores the key benefits and costs of implementing Total Quality Management (TQM) in student affairs. Discusses the experiences of early innovators and uses specific criteria to analyze TQM. Outlines effects on financial aid, costs, goal achievement, time and resource commitment, long-term focus, leaders as models, and clarity of mission. (RJM)|

Howard, Nancy Lee



Infección por VPH en mujeres con artritis reumatoide  

Microsoft Academic Search

Background: Human papillomavirus (HPV) is the main risk factor for the development of cervical cancer, which remains the most com- mon malignancy in our country. There are studies in which immunosuppressed patients have an increased risk of suffering an infection by HPV. Objective: To determine the prevalence of HPV infection in patients with rheumatoid arthritis (RA) compared with women matched

Diana E Flores Alvarado; Rocío Ortiz López; Mario Alberto; Garza Elizondo; Jacqueline Rodríguez Amado; Brenda R Vázquez Fuentes; Anajulia González Betancourt



Microsoft Academic Search

With new legislation on provision of interpreters in hospitals and courts being passed around the U.S., an increasing number of hospital and court administrators are seeing Telephone Interpreting (TI) as the solution to their communication problems with limited-English proficient citizens and immigrants. While the number of TI service providers grows and the use of TI spreads, TI has also become

Roberto A. Gracia-García


Moti e distanze angolari in cielo con telescopio e cronometro  

Microsoft Academic Search

A basic telescope and a chronometer can be used to learn classical methods of spherical astronomy. The conjunction Venus-Saturn of July 2, 2007 has been observed through July 3 with a 50 mm telescope. Planetary daily motions and angular distances with respect to Psi Leonis, have been obtained with telescope field of view crossing times with an accuracy of 1

Costantino Sigismondi




Microsoft Academic Search

The ethanol production in Colombia represents one of the more important economic lines, produced like antiseptic, reliable alcohol and additive for the gasoline. The porpuse of this work was of to increase the efficiency in the production of ethanol and to find a microorganism that represents an alternative in production, in front a Saccharomyces cerevisiaeit. Stocks of Zymomonas mobilisto var.

Adriana Matiz; Claudia Torres; Raúl A. Poutou



Broadening the DebateThe Pros and Cons of Globalization  

Microsoft Academic Search

Globalization has become an increasingly controversial topic, and the growing number of protests around the world has focused more attention on the basic assumptions of globalization and its effects. The purpose of this literature review is to broaden the boundaries of the debate on globalization and increase our understanding of its influence beyond the economic sphere. The winners and losers

Joyce S. Osland



Cervicogenic headache: the neck is a generator: con.  


Cervicogenic headache (CeH) is a well-recognized headache syndrome, distinguishable from other primary and secondary headaches. Although in some cases a cervical lesion may be detected in connection with the headache, many CeH patients have no demonstrable lesion. Besides, most of the frequent cervical diseases, such as spondylosis and disc herniations, do not present with headache of the cervicogenic type. This suggests that the neck is not an independent headache generator. CeH may depend in addition on a central predisposition counterpart, leading to the activation of the trigeminovascular system and pain generation. PMID:20456157

Vincent, Maurice B



Tratamiento de prúrigo nodular con ultravioleta B de banda estrecha  

Microsoft Academic Search

Summary Prurigo nodularis is an uncommon chronic skin condition characterized by multiple intensely itchy papules and nodules. Both the pruritus and the skin lesions are difficult to treat and are often refractory to many treatments. Local, intralesional and sistemic drugs, criosurgery and phototherapy have been employed, even in combination. Therapy of nodular prurigo with narrow band UVB phototherapy is a

Carolina Cantalejo Rodríguez; Ana María; Carrizosa Esquivel; Francisco Camacho Martínez



Microsoft Academic Search

The therapy for osteoporosis aims to reduce the incidence of fractures, which can be possible through the inhibition of the mechanism of bone reabsorption. Anyway, because the osteoclasts are not the only cells involved, the employment of an anabolic therapy, which can stmulate osteoblasts, seems to be interesting . Fluoride is annexed to the hydroxyapatite crystals and stimulates the bone

Giovanni Carlo Isaia; Federica Formoso; Stefania Di Bell


[Pros and cons of gonadectomy in female and male cats].  


Gonadectomy irreversibly prevents reproduction by removing germ cells as well as gonadal hormones. Moreover, consequences of gonadectomy include metabolic alterations influencing the incidence of diseases, phenotype and behavior. The desirable and undesirable effects of castration on different organ systems and their relation to timing of gonadectomy are discussed. For reasons of disease prevention as well as ease of husbandry and control of pet overpopulation prepuberal castration of non-breeding cats is recommended. At the time of gonadectomy the risk for developing obesity and associated diseases as well as dietary measures should be discussed with the owner. PMID:20533200

Reichler, I M



Hierro sacarosa intravenoso en el paciente con enfermedad renal crónica  

Microsoft Academic Search

We review the treatment of renal anemia with intravenous iron sucrose in predialysis, hemodialysis and peritoneal dialysis patients. The available evidence shows that intravenous iron sucrose is a highly effective treatment for iron-deficiency anemia in patients with renal disease.Moreover, intravenous iron sucrose is a cost-effective treatment because it reduces the required dosage of erythro-poiesis-stimulating agents. Intravenous iron sucrose is safe

Elena Donado; Marta Aguasca; Julen Ocharan-Corcuera; Iñaki Minguela; Isabel Gimeno; Alejandro Chena; Ramón Ruiz-De-Gauna




Technology Transfer Automated Retrieval System (TEKTRAN)

Wind power has been used to pump water for centuries; however, the development of the modern wind turbine has allowed for more applications for water pumping. This book, now available in Spanish, was written to give a complete overview of wind power water pumping and serves as a design guide for wa...


Encompassing Sexual Medicine within Psychiatry: Pros and Cons  

ERIC Educational Resources Information Center

|Objective: This article examines the positive and negative aspects of psychiatry encompassing sexual medicine within its purview. Methods: MEDLINE searches for the period between 1980 to the present were performed with the terms "psychiatry," "sexual medicine," and "sexual dysfunction." In addition, sexual medicine texts were reviewed for…

Segraves, Robert Taylor