B.K. Biswal、N. Sukumar、M. Vijayan2000-09-01Acta Crystallographica Section D Biological Crystallography
The structure analyses of orthorhombic lysozyme grown at pH 6.5 and its low-humidity variant are reported. The structures of the same form grown at pH 9.5 and 4.5 and that of the low-humidity variant of the pH 9.5 form are available. A comparison between them shows that the changes in molecular geometry and hydration…
Protein Structure and DynamicsEnzyme Structure and FunctionPorphyrin Metabolism and Disorders
Toshio Ogawa2000-09-01Japanese Journal of Applied Physics
Domain switching and rotation in lead titanate ceramics were evaluated by investigating the poling field dependence of the relative intensity of the X-ray diffraction (002) peak and the electrical properties. Although the lead titanate ceramic surface was highly oriented in the direction of the c -axis by the poling f…
Ferroelectric and Piezoelectric MaterialsUltrasonics and Acoustic Wave PropagationAcoustic Wave Resonator Technologies
Yasuharu Hosono、Kouichi Harada、Yohachi Yamashita 等 5 位作者2000-09-01Japanese Journal of Applied Physics
Single crystals of the x Pb(Sc 1/2 Nb 1/2 )O 3 – y Pb(Mg 1/3 Nb 2/3 )O 3 – z PbTiO 3 (PSMNT 100 x /100 y /100 z ) ternary system have successfully been grown by a flux method using 71.4 mol% PbO–28.6 mol% B 2 O 3 flux. The crystals were grown in a platinum crucible by mass crystallization achieved by the slow cooling…
Ferroelectric and Piezoelectric MaterialsMicrowave Dielectric Ceramics SynthesisDielectric properties of ceramics
O. Isnard、Dimitri Hautot、Gary J. Long 等 4 位作者2000-09-01Journal of Applied Physics
The structural and magnetic properties of the Dy2Fe17Hx compounds, where x is 0, 1, 2, 3, and 3.8, have been investigated by means of powder x-ray diffraction, thermomagnetic and ac magnetic susceptibility measurements, and iron-57 Mössbauer spectroscopy. The Dy2Fe17Hx compounds crystallize in a hexagonal Th2Ni17 -lik…
Magnetic properties of thin filmsMagnetic Properties and ApplicationsMagnetic Properties of Alloys
S. Hirose、Shinya Hayami、Yonezo Maeda2000-09-01Bulletin of the Chemical Society of Japan
Abstract New spin-crossover Iron(III) complexes [Fe(salten)(trans-stpy)]BPh4·(CH3)2CO·0.5H2O 1 and [Fe(salten)(cis-stpy)]BPh42 with cis-trans photoisomerizable ligands have been synthesized and characterized, where trans-stpy is trans-4-styrylpyridine and cis-stpy cis-4-styrylpyridine, and salten denotes bis(3-salicyl…
Magnetism in coordination complexesLanthanide and Transition Metal ComplexesElectron Spin Resonance Studies
C. E. Sosolik、Andone C. Lavery、E. B. Dahl 等 4 位作者2000-09-01Review of Scientific Instruments
We have performed measurements of the spatial distribution of current in various alkali and reactive ion beams over the energy range 5–600 eV using a Faraday cup. Ion beam current densities have been extracted from these measurements using a simple deconvolution procedure. Our results reveal that the beams are Gaussia…
Mass Spectrometry Techniques and ApplicationsElectron and X-Ray Spectroscopy TechniquesIon-surface interactions and analysis
Guillermo Jiménez、Shigeo Asai、Atsushi Shishido 等 4 位作者2000-09-01European Polymer Journal
Effect of the soft-segment structure and molecular weight on the microphase separation in segmented polyurethanes (SPU) was determined by means of differential scanning calorimetry, small-angle X-ray scattering, dielectric constant measurement, pulsed nuclear magnetic resonance, and thermoluminescence. Possible change…
Polymer crystallization and propertiesPolymer Nanocomposites and PropertiesPolymer composites and self-healing
G. S. Chilaya2000-09-01Crystallography Reports
The publications on low-molecular thermotropic liquid crystals with cholesteric structures have been reviewed. The effect of an applied electric field on cholesteric structures is studied. Bistability of the cholesteric-nematic transition, electric field-induced color textures of cholesteric mixtures, and electro-opti…
Liquid Crystal Research AdvancementsPlant Reproductive BiologyMolecular spectroscopy and chirality
David Howell、Marion Graupner、Huimin Xu 等 4 位作者2000-09-01Journal of Bacteriology
Two putative Methanococcus jannaschii isocitrate dehydrogenase genes, MJ1596 and MJ0720, were cloned and overexpressed in Escherichia coli, and their gene products were tested for the ability to catalyze the NAD- and NADP-dependent oxidative decarboxylation of DL-threo-3-isopropylmalic acid, threo-isocitrate, erythro-…
Microbial Metabolic Engineering and BioproductionEnzyme Structure and FunctionBiochemical and Molecular Research
Kosuke Shiratsuyu、Kôichi Hayashi、Akira Ando 等 4 位作者2000-09-01Japanese Journal of Applied Physics
The compositional design of Pb(Zr, Ti)O 3 –Pb(Ni, Nb)O 3 ceramics to lower the sintering temperature and improve their piezoelectric properties was investigated. The nonstoichiometric composition containing excess NiO or PbO and NiO can be densified at 800°C. The excess NiO composition can be fabricated in the firing…
Ferroelectric and Piezoelectric MaterialsAcoustic Wave Resonator TechnologiesMicrowave Dielectric Ceramics Synthesis
John E. McGrady2000-09-01Angewandte Chemie International Edition
Broken-symmetry density functional theory shows that there is no intrinsic link between the change in structure and the change in spin state shown by [(Cp*RuCl)2(μ-Cl)2]. The bistability observed in this complex should therefore be regarded as an example of bond-stretch isomerism, rather than spin-state isomerism [Eq.…
Organometallic Complex Synthesis and CatalysisMagnetism in coordination complexesMetal-Catalyzed Oxygenation Mechanisms
Antonio Delgado、José Rafael Ruiz、María Carmen del Campillo 等 5 位作者2000-09-01Communications in Soil Science and Plant Analysis
Phosphorus (P) forms in soils determine the amount of P available for crops and the potential for this element to be released to water. Sequential chemical fractionation can provide some information about major P forms in soils, and allow one to distinguish iron (Fe)‐related phosphorus from calcium (Ca)‐bound P. The 3…
Clay minerals and soil interactionsIron oxide chemistry and applicationsPhosphorus and nutrient management
M. A. Korotin、Takeo Fujiwara、В. И. Анисимов2000-09-01Physical review. B, Condensed matter
The electronic structure of ${\mathrm{La}}_{7/8}{\mathrm{Sr}}_{1/8}{\mathrm{MnO}}_{3}$ was studied by using the rotation-invariant LSDA (local spin density approximation)+U formalism. We found the specific kind of charge and orbital order for ferromagnetic insulating solution in a $2a\ifmmode\times\else\texttimes\fi{}…
Magnetic and transport properties of perovskites and related materialsRare-earth and actinide compoundsAdvanced Condensed Matter Physics
Nagarajan Arumugam、Yong-Sung Jang、Chang‐Hee Lee2000-09-01Organic Letters
meso-Alkylporphyrinogen-like cyclic oligomers containing furans and pyrroles have been synthesized by "3 + 2" and "4 + 2" approaches. Condensation of 5,5,10,10,15,15-hexaethyl-21, 22-dioxatetrapyrromethane with 2,5-bis[(alpha-hydroxy-alpha, alpha-dimethyl)furan] resulted in the formation of cyclic hexamer and cyclic d…
Molecular Sensors and Ion DetectionPorphyrin and Phthalocyanine ChemistrySynthesis and Characterization of Pyrroles
Thomas Phely-Bobin、R. J. Muisener、Jeffrey T. Koberstein 等 4 位作者2000-09-01Advanced Materials
The specific self-assembly of Si/SiOx core–shell nanoparticles onto UV/ozone micropatterned poly(dimethylsiloxane) (PDMS) films is reported here. Auger and Raman spectroscopic mapping document the preferential Si/SiOx nanoparticle adsorption within PDMS domains (see Figure). These nanoparticles display a high refracti…
Photonic Crystals and ApplicationsSilicon Nanostructures and PhotoluminescenceOptical Coatings and Gratings
Kenneth K. S. Lau、Jeffrey A. Caulfield、Karen K. Gleason2000-09-01Journal of Vacuum Science & Technology A Vacuum Surfaces and Films
Hot filament chemical vapor deposition using hexafluoropropylene oxide as the precursor gas yielded two sets of fluorocarbon films, one with varying OH/COOH content and the other with varying grain aspect ratio, as revealed by Fourier transform infrared spectroscopy and atomic force microscopy, respectively. Variable…
High voltage insulation and dielectric phenomenaOptical Coatings and GratingsFluid Dynamics and Thin Films
Jie-Hua Zhao、Todd Ryan、Paul S. Ho 等 5 位作者2000-09-01Journal of Applied Physics
A bending beam technique has been developed for on-wafer characterization of thermomechanical properties of dielectric thin films including Young’s modulus (E), the coefficient of thermal expansion (CTE), and the Poisson ratio (ν). The biaxial modulus E/(1−ν) and CTE were determined by measuring the thermal stresses o…
Semiconductor materials and devicesCopper Interconnects and ReliabilitySynthesis and properties of polymers
Yanqing Tian、Eiichi Akiyama、Yu Nagase 等 6 位作者2000-09-01Macromolecular Chemistry and Physics
This paper deals with two series of novel side-group liquid crystalline polymers containing coumarin (2H-1-benzopyran-2-one) moieties. Several kinds of polymethacrylates of Series I (Fig. 1) containing a 7-benzoyloxycoumarin unit in the side group with or without substituent at 3 or 4 position of coumarin ring were pr…
Liquid Crystal Research AdvancementsSynthesis and properties of polymersSynthesis of Organic Compounds
Ji‐Zhao Liang、Robert K.Y. Li、S. C. Tjong2000-09-01Polymer Engineering and Science
Abstract The effects of glass bead filler content and surface treatment of the glass with a silane coupling agent on the room temperature impact fracture behavior of polypropylene (PP)/ethylene‐propylene‐diene monomer copolymer (EPDM)/glass bead(GB) ternary composites were determined. The volume fraction of EPDM was k…
Polymer crystallization and propertiesPolymer Nanocomposites and PropertiesEngineering and Material Science Research
Akira Onodera Akira Onodera、Takayuki Kubo Takayuki Kubo、K. Yoshio 等 6 位作者2000-09-01Japanese Journal of Applied Physics
The crystal structure of Bi-layered perovskite Sr 0.85 Bi 2.1 Ta 2 O 9 was determined at 750 K by X-ray Rietveld analysis. Sr 0.85 Bi 2.1 Ta 2 O 9 with space group A2 1 am at room temperature transforms to the paraelectric phase above 670 K, passing through a probable intermediate state at 510 K. Assuming two possible…
Ferroelectric and Piezoelectric MaterialsMultiferroics and related materialsMicrowave Dielectric Ceramics Synthesis