191   Stress Relaxation of End-Linked Polydimethylsiloxane Elastomers with Long Pendent Chains Stress Relaxation of End-Linked Polydimethylsiloxane Elastomers with Long Pendent Chains Ashish Batra, Claude Cohen,* and Lynden Archer    2005 Two important issues in the area of stress relaxation in elastomers are addressed experimentally in this paper. The first deals with the dependence of the terminal relaxation time on the number of entanglements that a chain tethered to a network makes with the network, and the second deals with the validity of the empirical Chasset?Thirion equation. By carefully end-linking PDMS chains to form. networks with few defects besides the controlled amount of long pendent chains, our results show a muc... 查看全文

192   Properties of praseodymium-modified PZT binary ceramics Properties of praseodymium-modified PZT binary ceramics    2006 Pb1-1.5xPrxZr0.54 Ti0.46O3 piezoelectric ceramics were prepared by traditional technique using solid oxides as raw materials. The element valence, crystalline phase, microstructure have been studied by means of XPS, XRD and SEM. The results show that pure perovskite structure was obtained by calcining at 900°C. Near the morphotropic phase boundary of Pr concentration x=3 mol%, the rhombohedral phase and tetragonal phase region coexist. Pr-PZT system exhibits a well-situated property at x=3 m... 查看全文

193   APPLICATION OF PHOTON INDUCED X-RAY FLUORESCENCE FOR THE SIMULTANEOUS DETERMINATIONS OF COBALT, NICKEL AND MOLYBDENUM IN HYDRODESULFURIZATION CATALYSTS. APPLICATION OF PHOTON INDUCED X-RAY FLUORESCENCE FOR THE SIMULTANEOUS DETERMINATIONS OF COBALT, NICKEL AND MOLYBDENUM IN HYDRODESULFURIZATION CATALYSTS.    1982 查看全文

194   Nika: software for two-dimensional data reduction Nika: software for two-dimensional data reduction    0 Nika is an Igor Pro-based package for correction, calibration and reduction of two-dimensional area-detector data into one-dimensional data (`lineouts'). It is free (although the user needs a paid license for Igor Pro), open source and highly flexible. While typically used for small-angle X-ray scattering (SAXS) data, it can also be used for grazing-incidence SAXS data, wide-angle diffraction data and even small-angle neutron scattering data. It has been widely available to the user community si... 查看全文

195   V-band low phase-noise oscillator based on a cavity resonator integrated in the silicon substrate of the MCM-D platform V-band low phase-noise oscillator based on a cavity resonator integrated in the silicon substrate of the MCM-D platform Hwan H. Lee and Jae Y. Park    2012 In this article, we present a V-band low-phase-noise oscillator stabilized by a silicon integrated cavity resonator (SiCR). The SiCR is realized in a multi chip module-deposited thin-film technology platform. The high resistivity silicon substrate is thinned to 100 μm and through silicon vias are available. The resonator is formed by a double row of through silicon vias defining a TM010 cylindrical cavity resonator. The area on top of the resonator is reused for flip-chip mounting the active ... 查看全文

196   Preparation and Full Characterization of a Tetrahydride-bis(stannyl)-osmium(VI) Derivative Preparation and Full Characterization of a Tetrahydride-bis(stannyl)-osmium(VI) Derivative    2004 The dihydride-dichloro complex OsH2Cl2-(P iPr3)2 (1) reacts with 4.0 equiv of HSnPh 3 to afford 2.0 equiv of ClSnPh3 and the tetrahydride-bis(stannyl)-osmium(VI) derivative OsH4(SnPh 3)2(PiPr3)2 (2), which has been characterized by X-ray diffraction analysis. DFT calculations in a model system of 2, in which the bulky ligands have been replaced by small models, followed by QM/MM optimizations with the real ligands have allowed the complete determination of the hydride positions and the role play... 查看全文

197   Probing protein fine structures by wide angle solution X-ray scattering Probing protein fine structures by wide angle solution X-ray scattering Rudolf Widmer, Guy Masters and Freeman Gilbert    0 In this report we have investigated the use of wide angle scattering data not only to resolve overall size and shape of protein molecules in solution, but also to resolve details of fine structure. Methods have been developed for calculating protein solution scattering profiles based on atomic coordinates over a wide range of q with high accuracy in order to compare protein atomic models to wide angle scattering data. Calculations based upon these procedures show that X-ray scattering profiles f... 查看全文

198   Network flow approach to a city emergency evacuation planning Network flow approach to a city emergency evacuation planning    1996 Two network flow methods are presented in this paper to optimize a city emergency evacuation plan. The problem is to assign each resident of the city to one of the places of refuge (PR) in preparation for major disasters. We model the city as an undirected graph, and by solving a shortest path problem on this graph, we obtain the shortest evacuation plan. The second model takes the capacity limit on each PR explicitly into account. The problem can then be transformed into a minimal cost flow pro... 查看全文

199   Preparation and characteristics of PLZT (8/65/35) thin films by sol-gel method Preparation and characteristics of PLZT (8/65/35) thin films by sol-gel method    2011 (Pb,La)(Zr,Ti)O3 is a ferroelectric material which has excellent pyroelectric, dielectric and ferroelectric properties, and has a wide application prospect in the field of microelectronics and integrated circuit. A variety of techniques have been used for the deposition of ferroelectric thin films, among the processes, the sol-gel method has its advantages. In this study, the pyroelectric lead lanthanum zirconnate titanate (PLZT) (8/65/35) thin films were prepared on Pt (111)/Ti/SiO2/Si (100) su... 查看全文

200   ‘Artery-first’ approaches to pancreatoduodenectomy ‘Artery-first’ approaches to pancreatoduodenectomy Michael B. Mison, Barbara Steficek, Michael Lavagnino, Brian D. Teunissen, Joe G. Hauptman and Richa    2012 The technique of pancreatoduodenectomy (PD) has evolved. Previously, non-resectability was determined by involvement of the portal vein–superior mesenteric vein. Because venous resection can be achieved safely and with greater awareness of the prognostic significance of the status of the posteromedial resection margin, non-resectability is now determined by involvement of the superior mesenteric artery (SMA). This change, with a need for early determination of resectability before an irrev... 查看全文

201   Isolation and characterization of a unicellular manganese-oxidizing bacterium from a freshwater lake in northwestern Russia Isolation and characterization of a unicellular manganese-oxidizing bacterium from a freshwater lake in northwestern Russia A. A. Falamin;A. V. Pinevich    2006 A unicellular manganese-oxidizing bacterium (strain L7), isolated from Lake Ladoga, is identified as “Siderocapsa” sp. according to its morphology. However, this bacterium belongs to the phylogenetic cluster of Pseudomonas putida. The physiological characteristics (utilization of sugars, polyols, organic acids, and phenolic substrates as carbon and energy sources) also indicate the similarity of strain L7 to representatives of the genus Pseudomonas. The growing culture oxidiz... 查看全文

202   Sulphide glasses doped with rare earth elements Sulphide glasses doped with rare earth elements    2001 Sulphide glasses of GeGaS and GeGaAsS systems doped with rare earth ions are promising materials for various photonic applications. Because the solubility of rare earth elements is influenced by the purity of host glass, namely by OH group concentration, the attention has been paid to the preparation of highly pure and homogeneous undoped and rare earth doped glasses. Particularly the systems Ge0.25Ga0.1-xS0.65Prx and Ge0.25Ga0.05-xAs0.05S0.65 Prx with x = 0.05, 0.1, 0.3 and 0.6 wt.% have been p... 查看全文

203   Cannabis Induced Psychosis Cannabis Induced Psychosis Arindam Mukherjee, Rajamani Raghunathan, Manas K. Saha, Munirathinam Nethaji, Suryanarayanasastry Ra    2006 查看全文

204   Preparation and characterization of long-afterglow nanophosphors CaTiO3:Pr Preparation and characterization of long-afterglow nanophosphors CaTiO3:Pr    2007 CaTiO3:Pr nanophosphors were prepared with a gel-network precipitation technique using cheap inorganic precursors. The samples, being well dispersed and sphere-like with an average diameter of 100 nm, were observed with transmission electron microscope (TEM). The mechanism of coprecipitation and crystallization was discussed briefly based on TG-DTA and the X-ray diffractometer (XRD) results. The luminescent properties were investigated by the fluorescence spectrophotometer. The conditions of the... 查看全文

205   Evidence for a transition in the pairing symmetry of the electron-doped cuprates La2-xCexCuO4-y and Pr2-xCexCuO4-y Evidence for a transition in the pairing symmetry of the electron-doped cuprates La2-xCexCuO4-y and Pr2-xCexCuO4-y    2002 Magnetic penetration depth λ-2(T) in electron doped cuprates Pr2-xCexCuO4-y and La2-xCexCuO4-y was analysed. These films were prepared by molecular beam epitaxy (MBE) on SrTiO3 substrates. Results showed an abrupt transition in the behavior. of h-doped cuprates and there are transitions also in e-doped and h-doped cuprate behavior. near optimal doping. 查看全文

206   P14.20: Prenatal diagnosis of a large axillary cystic lymphangioma P14.20: Prenatal diagnosis of a large axillary cystic lymphangioma Arindam Mukherjee, Rajamani Raghunathan, Manas K. Saha, Munirathinam Nethaji, Suryanarayanasastry Ra    2010 查看全文

207   Self-organized rod-like nanostructure in Pr2Fe 14B-type alloy and its role in inducing texture during the early stages of disproportionation Self-organized rod-like nanostructure in Pr2Fe 14B-type alloy and its role in inducing texture during the early stages of disproportionation    2011 Anisotropic Pr13Fe80B7 magnetic powders with a maximum energy product of 216 kJ m-3 were prepared through an optimized hydrogenation disproportionation desorption recombination process. The disproportionated products display a rod-like microstructure with self-organized hexagonal PrH2 nanorods embedded in Fe matrix. B element appears between the highly ordered rod-like regions. Both the highly ordered rod-like structure and the specific distribution of B in the disproportionated microstructure a... 查看全文

208   Oxygen permeation and methane conversion properties of ceria-based composite membranes prepared by tape-casting technique Oxygen permeation and methane conversion properties of ceria-based composite membranes prepared by tape-casting technique    2004 The preparation of ceria-based composite membranes by means of tape-casting technique and their oxygen permeation and methane reforming properties have been investigated. Oxide powders comprising of Ce1-xRE xO2-δ (RE = Pr and Sm) and spinel-type ferrites of MFe 2O4 (M = Mn and Co) were prepared by the citrate-based liquid-mix technique. As a result of the optimization of ceramics slurry composition, a crack-free dense membrane with dimensions of 5 cm × 5 cm and 140 μm in thickness... 查看全文

209   Preparation and application of pharmaceutical wastewater treatment by praseodymium doped SnO2/Ti electrocatalytic electrode Preparation and application of pharmaceutical wastewater treatment by praseodymium doped SnO2/Ti electrocatalytic electrode    2008 Praseodymium was selected as a promoter for SnO2/Ti electrode to improve the electrocatalytic performance by electrodeposition in pharmaceutical wastewater treatment; the micrograph and the structure were characterized by SEM and XRD. Mixture uniform. design was used in the optimization of the electrolytic conditions; mathematical model was established according to the rate of wiping COD off, which revealed the relationship between the current intensity, time of electrolysis, the amount of doped... 查看全文

210   Protonic conduction in potassium dihydrogen arsenate Protonic conduction in potassium dihydrogen arsenate C. T. Perrino, Bosco. Lan, Ray. Alsdorf    1972 查看全文

211   P15.01: The development of spina bifida in a rat model P15.01: The development of spina bifida in a rat model    2010 查看全文

212   The Meaning of Unpatterned Vocational Interests The Meaning of Unpatterned Vocational Interests    2011 The purpose of the study was to find the relationships between SVIB patterning and psychological adjustment, maturity, and intelligence. Male SVIB profiles were categorized as Primaries, Secondaries, or No Patterns. The three groups were compared on MMPI scales, using a two-factor ANOVA; no differences between the groups were obtained at the .05 level of confidence. The groups were compared on age and aptitude scores, using in each case a simple ANOVA; no mean differences were obtained at the .0... 查看全文

213   Preparation of PZT ferroelectric thick films by nanopowder-metal-organic decomposition process Preparation of PZT ferroelectric thick films by nanopowder-metal-organic decomposition process    2000 In the paper, a modified metal-organic decomposition (MOD) process has been developed for the fabrication of PZT thick films. Nano-sized PZT powders, around 5-15 nm, were first synthesized using hydrolysis of PZT alkoxide precursors, and then incorporated into a precursor containing PZT-carboxylates (0.2 M), followed by spin-coating process. The properties of nano-powder incorporated PZT precursors solution influences the spin-coating characteristics markedly, which is presumably due to the modi... 查看全文

214   Expression profiling of gastric adenocarcinoma using cDNA array Expression profiling of gastric adenocarcinoma using cDNA array    2001 To investigate the expression profile of gastric adenocarcinoma, cDNA array experiments were performed using Atlas Human Cancer 1.2 K Array (Clontech Laboratories, Palo Alto, CA) on nine xenografted and two primary gastric cancer samples. The expression of the tumor samples was compared to that of two normal gastric epithelial tissues. The expression pattern of the primary tumors was similar to that of xenografted tumors. The up-regulated genes had expression ratios ranging from 2.5 to 16, where... 查看全文

215   THE COMPREHENSIVE PSYCHOPATHOLOGICAL RATING SCALE (CPRS): COMMUNICABILITY TO, AND INTER-RATER RELIABILITY AMONG UNTRAINED RATERS THE COMPREHENSIVE PSYCHOPATHOLOGICAL RATING SCALE (CPRS): COMMUNICABILITY TO, AND INTER-RATER RELIABILITY AMONG UNTRAINED RATERS    2007 查看全文

216   Design of peptidomimetic inhibitors of aspartic protease of HIV-1 containing -PhePro- core and displaying favourable ADME-related properties Design of peptidomimetic inhibitors of aspartic protease of HIV-1 containing -PhePro- core and displaying favourable ADME-related properties    2008 Aspartic protease (PR) of HIV-1 virus represents a valid therapeutic target for the design of antiviral agents suitable for treatment of AIDS. We have designed peptidomimetic PR inhibitors containing a novel dihydroxyethylenediamine -Phe-Ψ[CHOH-CHOH]-Pro- core using molecular modelling approach that predicts the inhibitory potencies (I C50pre) in terms of computed relative enzyme-inhibitor complexation Gibbs free energies (ΔΔGcomp). The modelling approach considers not only the e... 查看全文

217   Growth of electron-doped superconductor Pr0.9LaCe 0.1Cu04 films and their applications to intrinsic josephson junctions Growth of electron-doped superconductor Pr0.9LaCe 0.1Cu04 films and their applications to intrinsic josephson junctions    2009 As a typical electron-doped high-Tc superconductor, Pr 0.9LaCe0.1CuO4 (PLCCO) single crystal samples were widely studied. In this work, superconducting PLCCO films have been successfully prepared by pulsed laser deposition method. The zero resistance transition temperature of the films deposited under optimal condition is up to 24.0 K, equal to the reported value of single crystals with the same composition. Further, in PLCCO micro-bridges structured across a low-angle step on (srTiO3100) substr... 查看全文

218   Long-term results of surgery for lithium-associated hyperparathyroidism (Br J Surg 2010; 97:1680–1685) Long-term results of surgery for lithium-associated hyperparathyroidism (Br J Surg 2010; 97:1680–1685) Yuzo Umeda, Takahito Yagi, Hiroshi Sadamori, Hiroyoshi Matsukawa, Hiroaki Matsuda, Susumu Shinoura,    2010 查看全文

219   Step coverage and electrical properties of (Ba, Sr)TiO3 films prepared by liquid source chemical vapor deposition using TiO(DPM)2 Step coverage and electrical properties of (Ba, Sr)TiO3 films prepared by liquid source chemical vapor deposition using TiO(DPM)2    1994 Thin films of (Ba, Sr)TiO3 (BST) with high dielectric constant were prepared on Pt/SiO2/Si substrates of 6-inch-diameter by liquid source chemical vapor deposition using Ba(DPM)2, Sr(DPM)2 and TiO(DPM)2 (DPM = dipivaloylmethanato; C11H19O2) dissolved in tetrahydrofuran (THF). The reproducibility of ±3% for the film composition was achieved by optimizing the deposition procedures. It was found that the coverage of 72%, obtained at the substrate temperature Ts = 753 K, was better than those... 查看全文

220   The Major Allergen from Birch Tree Pollen, Bet v 1, Binds and Permeabilizes Membranes† The Major Allergen from Birch Tree Pollen, Bet v 1, Binds and Permeabilizes Membranes† Jesper E. Mogensen,‡§ Mercedes Ferreras,‖ Reinhard Wimmer,‡ Steen V. Petersen, Jan J. Enghild, and D    2007 The 159 residue Bet v 1 is the major allergen from birch tree pollen. Its natural function is unknown although it is capable of binding several types of physiologically relevant ligands in a centrally placed cavity in the protein structure. Here we use circular dichroism and fluorescence spectroscopy to show that Bet v 1 binds to DOPC and DOPG phospholipid vesicles in a pH-dependent manner. Binding is facilitated by low pH, negatively charged phospholipids, and high vesicle curvature, indicating... 查看全文

[1]  [2]  [3]  [4]  [5]  [6]  [7]  [8]  [9]  [10]  [11]  [12]  [13]  [14]  [15]  [16]  [17]  [18]  [19]  20  [21]  [22]  [23]  [24]  [25]  [26]  [27]  [28]  [29]  [30]  [31]  [32]  [33]  [34]  [35]  [36]  [37]  [38]  [39]  [40]  [41]  [42]  [43]  [44]  [45]  [46]  [47]  [48]  [49]  [50]  [51]  [52]  [53]  [54]  [55]  [56]  [57]  [58]  [59]  [60]  [61]  [62]  [63]  [64]  [65]  [66]  [67]  [68]  [69]  [70]  [71]  [72]  [73]  [74]  [75]  [76]  [77]  [78]  [79]  [80]  [81]  [82]  [83]  [84]  [85]  [86]  [87]  [88]  [89]  [90]  [91]  [92]  [93]  [94]  [95]  [96]  [97]  [98]  [99]  [100]  [101]  [102]  [103]  [104]  [105]  [106]  [107]  [108]  [109]  [110]  [111]  [112]  [113]  [114]  [115]  [116]  [117]  [118]  [119]  [120]  [121]  [122]  [123]  [124]  [125]  [126]  [127]  [128]  [129]  [130]  [131]  [132]  [133]  [134]  [135]  [136]  [137]  [138]  [139]  [140]  [141]  [142]  [143]  [144]  [145]  [146]  [147]  [148]  [149]  [150]  [151]  [152]  [153]  [154]  [155]  [156]  [157]  [158]  [159]  [160]  [161]  [162]  [163]  [164]  [165]  [166]  [167]  [168]  [169]  [170]  [171]  [172]  [173]  [174]  [175]  [176]  [177]  [178]  [179]  [180]  [181]  [182]  [183]  [184]  [185]  [186]  [187]  [188]  [189]  [190]  [191]  [192]  [193]  [194]  [195]  [196]  [197]  [198]  [199]  [200]  [201]  [202]  [203]  [204]  [205]  [206]  [207]  [208]  [209]  [210]  [211]  [212]  [213]  [214]  [215]  [216]  [217]  [218]  [219]  [220]  [221]  [222]  [223]  [224]  [225]  [226]  [227]  [228]  [229]  [230]  [231]  [232]  [233]  [234]  [235]  [236]  [237]  [238]  [239]  [240]  [241]  [242]  [243]  [244]  [245]  [246]  [247]  [248]  [249]  [250]  [251]  [252]  [253]  [254]  [255]  [256]  [257]  [258]  [259]  [260]  [261]  [262]  [263]  [264]  [265]  [266]  [267]  [268]  [269]  [270]  [271]  [272]  [273]  [274]  [275]  [276]  [277]  [278]  [279]  [280]  [281]  [282]  [283]  [284]  [285]  [286]  [287]  [288]  [289]  [290]  [291]  [292]  [293]  [294]  [295]  [296]  [297]  [298]  [299]  [300]  [301]  [302]  [303]  [304]  [305]  [306]  [307]  [308]  [309]  [310]  [311]  [312]  [313]  [314]  [315]  [316]  [317]  [318]  [319]  [320]  [321]  [322]  [323]  [324]  [325]  [326]  [327]  [328]  [329]  [330]  [331]  [332]  [333]  [334]  [335]  [336]  [337]  [338]  [339]  [340]  [341]  [342]  [343]  [344]  [345]  [346]  [347]  [348]  [349]  [350]  [351]  [352]  [353]  [354]  [355]  [356]  [357]  [358]  [359]  [360]  [361]  [362]  [363]  [364]  [365]  [366]  [367]  [368]  [369]  [370]  [371]  [372]  [373]  [374]  [375]  [376]  [377]  [378]  [379]  [380]  [381]  [382]  [383]  [384]  [385]  [386]  [387]  [388]  [389]  [390]  [391]  [392]  [393]  [394]  [395]  [396]  [397]  [398]  [399]  [400]  [401]  [402]  [403]  [404]  [405]  [406]  [407]  [408]  [409]  [410]  [411]  [412]  [413]  [414]  [415]  [416]  [417]  [418]  [419]  [420]  [421]  [422]  [423]  [424]  [425]  [426]  [427]  [428]  [429]  [430]  [431]  [432]  [433]  [434]  [435]  [436]  [437]  [438]  [439]  [440]  [441]  [442]  [443]  [444]  [445]  [446]  [447]  [448]  [449]  [450]  [451]  [452]  [453]  [454]  [455]  [456]  [457]  [458]  [459]  [460]  [461]  [462]  [463]  [464]  [465]  [466]  [467]  [468]  [469]  [470]  [471]  [472]  [473]  [474]  [475]  [476]  [477]  [478]  [479]  [480]  [481]  [482]  [483]  [484]  [485]  [486]  [487]  [488]  [489]  [490]  [491]  [492]  [493]  [494]  [495]  [496]  [497]  [498]  [499]  [500]   下一页