Wiebke Schreiber、Peter Dürre1999-08-01Microbiology
Glyceraldehyde-3-phosphate dehydrogenase was purified from Clostridium acetobutylicum by sequential ammonium sulfate precipitation, gel filtration and anion-exchange chromatography (to a specific activity of 27 U mg-1). The enzyme had a molecular mass of 40 kDa as determined by SDS-PAGE and a native molecular mass of…
Genomics and Phylogenetic StudiesBacterial Genetics and BiotechnologyEnzyme Structure and Function
Baoquan Chen、Jianxun Wen1999-08-01Liquid Crystals
One series of two-ring and two series of three-ring liquid crystal compounds, all containing omega, alpha, alpha-trihydroperfluoroalkoxy terminal tails, were prepared and characterized by IR, NMR, MS and elemental analysis. Their phase transition behaviour was investigated by DSC and polarizing optical microscopy. Bip…
Liquid Crystal Research AdvancementsSurfactants and Colloidal SystemsPhotochromic and Fluorescence Chemistry
A.H.W. Ngan、H. F. Zhang1999-08-01Journal of Applied Physics
By analyzing experimental data in the literature, the activation energy H for slip in body-centered cubic metals is found to approximately obey the simple relation H≈0.1 μb3(1−t)2, where t is the applied stress normalized by the zero-temperature Peierls stress, μ is the 〈111〉 shear modulus, and b the 1/2〈111〉 Burgers…
Microstructure and mechanical propertiesFusion materials and technologiesSurface and Thin Film Phenomena
Keran Zhang、Furong Zhu、C. H. A. Huan 等 5 位作者1999-08-01Surface and Interface Analysis
Indium-doped zinc oxide (ZnO:In) films were prepared by simultaneous r.f. and d.c. magnetron sputtering. The structural, optical and electrical properties of the films have been obtained by x-ray diffractometry (XRD), Rutherford backscattering spectrometry (RBS), spectrophotometry and atomic force microscopy (AFM) tog…
ZnO doping and propertiesCopper-based nanomaterials and applicationsElectronic and Structural Properties of Oxides
Joachim Gottsmann、Donald B. Dingwell、Conrad Gennaro1999-08-01American Mineralogist
Article LETTERS. Thermal expansion of silicate liquids: Direct determination using container-based dilatometry was published on July 1, 1999 in the journal American Mineralogist (volume 84, issue 7-8).
Material Dynamics and PropertiesGlass properties and applicationsThermal and Kinetic Analysis
Marcos Labronici、Hatsuo Ishida1999-08-01Polymer Composites
Abstract A unidirectional continuous carbon fiber reinforced polyimide composite is fabricated using the PMR‐15 polyimide as a matrix. Mechanical and dynamic mechanical properties of the composite are studied. The effect of variation of the fiber content ranging from 55% to 70% by volume on the properties of the compo…
Epoxy Resin Curing ProcessesSynthesis and properties of polymersTribology and Wear Analysis
J. A. Dobrowolski、Li Li、James N. Hilfiker1999-08-01Applied Optics
A method for the design of cutoff filters is proposed that is based on the use of light at nonnormal angles of incidence and on the use of coating materials with a large dispersion of the optical constants. The optical constants are presented of several films made from indium tin oxide--a material that satisfies this…
ZnO doping and propertiesThin-Film Transistor TechnologiesOptical Coatings and Gratings
Yutaka Nigara、Kiichiro Kawamura、Tatsuya Kawada 等 5 位作者1999-08-01Journal of The Electrochemical Society
It was found that the sintered , which was not perovskite‐type but fluorite‐type, permeated hydrogen under atmosphere at 1050–1800 K. Three tube‐shaped specimens (ϕ 0.287 × 0.894 cm) (SP I, SP II, SP), the lengths of which were 1.40, 0.37, and 1.45 cm, were prepared. The nonexistence of micropores in specimens was con…
Catalytic Processes in Materials ScienceAdvancements in Solid Oxide Fuel CellsFuel Cells and Related Materials
Andrew Murray、A.G. Wintle1999-08-01Radiation Protection Dosimetry
Recent developments in our understanding of the relative importance of temperature-dependent charge transfer and luminescence recombination probability in quartz have shown the latter to be the dominant effect in experiments using a heat treatment (preheat) before optically stimulated luminescence (OSL) measurement. T…
Luminescence Properties of Advanced Materials
Takashi Hibino、Yoshitaka Kuwahara、Shuqiang Wang1999-08-01Journal of The Electrochemical Society
A one‐chamber solid oxide fuel cell (working in a methane‐air mixture) with yttria‐stabilized zirconia (YSZ) electrolyte was modified by adding oxide to the anode (Pt) and cathode (Au). It was determined that the addition of MnO 2 to both electrodes significantly improved the cell discharge characteristics. The short‐…
Electrocatalysts for Energy ConversionAdvancements in Solid Oxide Fuel CellsFuel Cells and Related Materials
Tzu‐Ping Ko、Szu-Pei Wu、Wei‐Zen Yang 等 5 位作者1999-08-01Acta Crystallographica Section D Biological Crystallography
Tyrosine aminotransferase catalyzes transamination for both dicarboxylic and aromatic amino-acid substrates. The substrate-free Escherichia coli tyrosine aminotransferase (eTAT) bound with the cofactor pyridoxal 5'-phosphate (PLP) was crystallized in the trigonal space group P3(2). A low-resolution crystal structure o…
RNA and protein synthesis mechanismsChemical Synthesis and AnalysisEnzyme Structure and Function
H. D. Rozman、Poh-Ying Lim、A. Abusamah 等 6 位作者1999-08-01International Journal of Polymeric Materials
Oil palm empty fruit bunch (EFB)-based composites were produced using different types of thermoplastic as matrices. The composites were produced by using an internal mixer. The mechanical and water absorption properties of composites were investigated. Overall, the incorporation of EFB into the polymer matrix has resu…
Natural Fiber Reinforced CompositesOil Palm Production and Sustainability
J. P. Bedel、H. T. Nguyen、J. C. Rouillon 等 6 位作者1999-08-01Molecular 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
The first series of achiral non symmetric banana-shaped mesogens has been synthesized. The mesophases observed for these compounds depend on the whole number of carbons in the alkyl chains (N). They were investigated by optical microscopy, calorimetry, X-ray diffraction experiments and electro-optical measurements. Fo…
Liquid Crystal Research AdvancementsSynthesis and Properties of Aromatic CompoundsMolecular spectroscopy and chirality
Luc R. Van Loon、Martin A. Glaus、A. Laube 等 4 位作者1999-08-01Radiochimica Acta
Article Degradation of Cellulosic Materials under the Alkaline Conditions of a Cementitious Repository for Low- and Intermediate Level Radioactive Waste. Part III: Effect of Degradation Products on the Sorption of Radionuclides on Feldspar was published on August 1, 1999 in the journal Radiochimica Acta (volume 86, is…
Graphite, nuclear technology, radiation studiesNuclear and radioactivity studies
D. Nataraj、K. Senthil、Sa. K. Narayandass 等 4 位作者1999-08-01Crystal Research and Technology
Thin films of Bi2Se3 have been prepared by vacuum deposition technique onto well cleaned glass and freshly cleaved KBr substrates. The film thicknesses are measured by Tolansky technique. The capacitance and dielectric constant have been measured from 303 K to 383 K in the frequency range of 10 kHz to 10 MHz. The a.c.…
Advanced Thermoelectric Materials and DevicesTopological Materials and PhenomenaPhase-change materials and chalcogenides
Peter Komadel、Jana Madejová、Joseph W. Stucki1999-08-01Clays and Clay Minerals
Abstract Partial stabilization of Fe(II) in chemically reduced smectite, which normally readily undergoes reoxidation in air, was achieved. The purpose of this study was to determine if Fe(II) can be stabilized in reduced smectites by Li fixation upon heating. More than 80% of total Fe in ferruginous smectite SWa-1 wa…
Soil and Unsaturated FlowClay minerals and soil interactionsIron oxide chemistry and applications
Oleg A. Louchev、Christian Dussarrat、Yoichiro Sato1999-08-01Journal of Applied Physics
The model presented considers surface kinetics processes, such as adsorption/desorption of hydrocarbon radicals, thermal dehydrogenation, evaporation, and carbon insertion into silicon, together with the bulk diffusion equation. The calculations performed show that surface protrusions present preferential locations fo…
Diamond and Carbon-based Materials ResearchLaser-induced spectroscopy and plasmaIon-surface interactions and analysis
作者信息未提供1999-08-01Zeitschrift für Kristallographie - Crystalline Materials
Abstract This paper deals with the application of full group theoretical methods to the elucidation of the symmetry and structure of an incommensurate phase. The analysis shows that the full symmetry and structure of the incommensurate phase can be determined unequivocably where certain minimal symmetry data are avail…
Crystal Structures and PropertiesSolid-state spectroscopy and crystallographyX-ray Diffraction in Crystallography
Masahiro Yoshikawa、Yoshihiro Mugikura、Takao Watanabe 等 5 位作者1999-08-01Journal of The Electrochemical Society
High operating pressure, about 12–25 atm, is required to develop a highly efficient molten carbonate fuel cell (MCFC) plant system combined with a gas turbine or coal gasifier system. Operation at high pressure, over 10 atm, will accelerate dissolution of the NiO cathode and shorten cell life. Therefore, economical ap…
Advanced Battery Materials and TechnologiesAdvancements in Solid Oxide Fuel CellsFuel Cells and Related Materials
I. Hrub�、S. Kamba、J. Petzelt 等 9 位作者1999-08-01physica status solidi (b)
Infrared (IR) reflectivity and submillimeter transmission measurements of ferroelectric and paraelectric LaBGeO5 single crystals were carried out in the temperature range of 300 to 870 K. From the classical oscillator fit to the spectra, the complex dielectric function in the range of 4 to 3000 cm—1 was calculated. In…
High-pressure geophysics and materialsCrystal Structures and PropertiesSolid-state spectroscopy and crystallography