Carlos J. Gómez‐García、Lahcène Ouahab、Carlos Giménez‐Saiz 等 6 位作者1994-02-01Angewandte Chemie International Edition in English
Alternating layers of radicals of the π-electron donor 1 and of polyoxonions [CoW12O40]6− (2, polyhedral representation) are contained in the title compound. Thus, organic charge carriers and inorganic electron-acceptor components lie next to each other. Since the polyoxometalates can accommodate different metal ions…
Magnetism in coordination complexesPolyoxometalates: Synthesis and ApplicationsOrganic and Molecular Conductors Research
Masahiro Watanabe、Hiroyuki Uchida、M. Shibata 等 5 位作者1994-02-01Journal of The Electrochemical Society
New concepts for a high performance catalyzed‐reaction layer for medium temperature operating solid oxide fuel cells were proposed. Mixed conducting oxide particles, samaria‐doped ceria (SDC), were employed as the anode material utilizing highly dispersed noble metal catalysts on their surface. As the cathode material…
Electrocatalysts for Energy ConversionAdvancements in Solid Oxide Fuel CellsFuel Cells and Related Materials
C. M. Williams、Douglas B. Chrisey、P. Lubitz 等 5 位作者1994-02-01Journal of Applied Physics
The magnetic and structural properties of pulsed laser deposited MnZn–ferrite films have been examined. The results show that the uniaxial anisotropy, ferromagnetic resonance linewidth and coercive force are strongly influenced by the microstructure of the films, and the saturation magnetization and first-order magnet…
Magnetic properties of thin filmsMagnetic Properties and Synthesis of FerritesMagnetic Properties and Applications
Antony S. Dimitrov、Ceco D. Dushkin、Hideyuki Yoshimura 等 4 位作者1994-02-01Langmuir
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTObservations of Latex Particle Two-Dimensional-Crystal Nucleation in Wetting Films on Mercury, Glass, and MicaAntony S. Dimitrov, Ceco D. Dushkin, Hideyuki Yoshimura, and Kuniaki NagayamaCite this: Langmuir 1994, 10, 2, 432–440Publication Date (Print):February 1, 1994Publica…
Photonic Crystals and ApplicationsPickering emulsions and particle stabilizationMaterial Properties and Processing
Hiromi Kirino、Makoto Aoki、Miho Aoshima 等 8 位作者1994-02-01European Journal of Biochemistry
We cloned and sequenced the leuB gene encoding 3-isopropylmalate dehydrogenase from Escherichia coli K-12 (JM103). Errors (33 residues) were found and corrected in the sequence previously reported for the leuB gene of Thermus thermophilus. The three-dimensional structure of the thermophile enzyme and the amino acid se…
Folate and B Vitamins ResearchEnzyme Structure and FunctionBiochemical and Molecular Research
M. Gautier、Gilles Fenaud、L. Pham Van 等 8 位作者1994-02-01Journal of the American Ceramic Society
New results on the R ± 9° reconstructed α‐Al 2 O 3 (0001) surface, which can be obtained after heating at high temperature (1400°C) under vacuum, are presented. The atomic structure has been studied by combining low‐energy electron diffractometry and grazing incidence X‐ray scattering. The surface structure is found t…
ZnO doping and propertiesElectron and X-Ray Spectroscopy TechniquesElectronic and Structural Properties of Oxides
Galen D. Stucky、Alain Monnier、Ferdi Schüth 等 11 位作者1994-02-01Molecular crystals and liquid crystals science technology. Section A, Molecular crystals and liquid crystals/Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals
A model is presented to explain the formation and morphologies of 3-d periodic surfactant-silicate mesostructures. The structures of lamellar, hexagonal tubular and a minimal surface cubic liquid crystal/silicate phase are described.
Zeolite Catalysis and SynthesisMesoporous Materials and CatalysisPolyoxometalates: Synthesis and Applications
Philippe Ribière、S. Pirkl、P. Oswald1994-02-01Liquid Crystals
In a previous article, we proposed a model to explain the unwinding transition in an electric field of a frustrated cholesteric liquid crystal sandwiched between two glass plates imposing a homeotropic anchoring. We found that three distinct solutions exist in materials of negative dielectric anisotropy: first, the ho…
Liquid Crystal Research AdvancementsSurfactants and Colloidal SystemsPlant Reproductive Biology
G. L. Gutsev1994-02-01The Journal of Physical Chemistry
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA Density Functional Investigation of the Geometrical and Electronic Structure of the SiCln and SiCln- Series, n = 1-5G. L. GutsevCite this: J. Phys. Chem. 1994, 98, 6, 1570–1575Publication Date (Print):February 1, 1994Publication History Published online1 May 2002Published…
Zeolite Catalysis and SynthesisSilicon Carbide Semiconductor TechnologiesSilicon Nanostructures and Photoluminescence
D. M. Heyes、Philip J. Aston1994-02-01The Journal of Chemical Physics
We examine the infinite frequency elastic moduli of steeply repulsive inverse power, r−n, potential fluids. Using molecular dynamics simulation we show that these are proportional to n and therefore diverge in the hard-sphere n→∞ limit, which we also prove independently for the case of hard spheres.
Phase Equilibria and ThermodynamicsMaterial Dynamics and PropertiesNMR spectroscopy and applications
Akiko Takahashi、Yoichi Tokai、Masashi Sahashi Hashimoto1994-02-01Japanese Journal of Applied Physics
Specific heat measurement was performed in the temperature range from 800 mK to 62 K on the regenerator material Er 3 Ni which is an antiferromagnet with a Néel temperature of 6.1 K and possesses a large volumetric heat capacity even at temperatures above T N . The magnetic contribution to the specific heat has been c…
Magnetic and transport properties of perovskites and related materialsHydrogen Storage and MaterialsMagnetic Properties of Alloys
E. V. Gomonaj、Victor A. L’vov1994-02-01Phase Transitions
Martensitic phase transitions in a stressed cubic crystal are studied by means of Landau theory with a two-component order parameter. The stress-temperature phase diagram is analyzed theoretically and is shown to consist of six essentially different regions isolated by the liability lines of austenite, tetragonal mart…
High-pressure geophysics and materialsSolid-state spectroscopy and crystallographyElectromagnetic Effects on Materials
Hagen Klemm、Giuseppe Pezzotti1994-02-01Journal of the American Ceramic Society
The influence of small additions of three selected oxides on the microstructure and the mechanical behavior of high‐purity silicon nitride was systematically investigated. Dense silicon nitride bodies doped respectively with SiO 2 , Y 2 O 3 , and Yb 2 O 3 were fabricated by hot isostatic pressing (HIP). Two different…
Advanced ceramic materials synthesisMetal and Thin Film MechanicsMXene and MAX Phase Materials
Chao‐Ching Chang、Adel F. Halasa、Joseph W. Miller 等 4 位作者1994-02-01Polymer International
Abstract The anionic polymerization of isoprene with n ‐butyl lithium and polar modifier such as TMEDA and tripiperdinophosphine oxide were studied and kinetic and reactor models are proposed for these systems. Reactor conversion, molecular weight distribution and polymer glass transition temperature had been calculat…
Organometallic Complex Synthesis and CatalysisLanthanide and Transition Metal ComplexesThermal and Kinetic Analysis
D. J. Kalota、D. C. Silverman1994-02-01CORROSION
Corrosion inhibition of steel by aspartic acid (C4H7NO4), an amino acid of low molecular weight, was found to depend strongly on pH. At a pH less than the ionization constant at ~ 9.5 to 10 (measured at 25°C), C4H7NO4 appeared to accelerate corrosion. Above that pH, it acted as a corrosion inhibitor for steel. A speci…
Corrosion Behavior and InhibitionConcrete Corrosion and DurabilityStructural Integrity and Reliability Analysis
Kwan‐Young Han、Tomohiro Miyashita、Taro Uchida1994-02-01Molecular crystals and liquid crystals science technology. Section A, Molecular crystals and liquid crystals/Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals
To measure the pretilt angle in a liquid crystal cell, the crystal rotation method is commonly used because it is very precise and the measurement time is short. However, if the cell gap is not uniform, a significant error occurs due to a shift of the measurement point. This shift is caused by refraction at the glass…
Liquid Crystal Research AdvancementsOptical Polarization and Ellipsometry
Hsing Lin Wang、Rebecca M. O'Malley、Jack E. Fernandez1994-02-01Macromolecules
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectrochemical and Chemical Polymerization of Imidazole and Some of Its DerivativesHsing Lin Wang, Rebecca M. O'Malley, and Jack E. FernandezCite this: Macromolecules 1994, 27, 4, 893–901Publication Date (Print):February 1, 1994Publication History Published online1 May 2002…
Conducting polymers and applications
Koji Yamada、K. Isobe、Taichi Okuda 等 4 位作者1994-02-01Zeitschrift für Naturforschung A
Abstract A series of trichlorogermanate(II) salts (AGeCl 3 , A = Rb, Cs, CH 3 N H 3 , and (CH 3 ) 4 N) have been synthesized and characterized by 35 Cl NQR , 35 Cl NMR , AC conductivity, DTA, and X-ray diffraction techniques. In the temperature range studied two, two, five, and four phases were confirmed for the Rb, C…
Perovskite Materials and ApplicationsOrganic and Molecular Conductors ResearchSolid-state spectroscopy and crystallography
C. J. G. Plummer、N. Cudré‐Mauroux、H. H. Kausch1994-02-01Polymer Engineering and Science
Abstract Transmission electron microscopy and optical studies of thin films of isotactic polystyrene (iPS) and polyoxymethylene (POM) provide evidence for a distinction between crazing mechanisms in semicrystalline polymers above and below T g . In the latter temperature regime, deformation in iPS and POM crystallized…
Polymer crystallization and propertiesPolymer Nanocomposites and PropertiesRheology and Fluid Dynamics Studies
Yoshihiro Iwasa、K. Mizuhashi、T. Koda 等 5 位作者1994-02-01Physical review. B, Condensed matter
Electrical and magnetic properties have been investigated for (BEDT-TTF)(TCNQ) which is composed of BEDT-TTF sheets and TCNQ columns. The metal-insulator transition temperature ${\mathit{T}}_{\mathrm{MI}}$, 330 K at ambient pressure, decreases down to 40 K by applying hydrostatic pressure, which may be ascribed to the…
Magnetism in coordination complexesOrganic and Molecular Conductors ResearchSolid-state spectroscopy and crystallography