Zhiren Zhang、Takuji Kudo、Yu Nakajima 等 4 位作者2001-03-01INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY
To resolve relationships between members of the family Thermomonosporaceae, phylogenetic analyses using three sets of nucleotide sequences from 16S rDNA, 23S rDNA and the 16S-23S internal transcribed spacer (ITS) were carried out. Nearly all species of the family were included in this study. On the basis of congruous…
Genomics and Phylogenetic StudiesPlant Pathogens and Fungal DiseasesDiatoms and Algae Research
Takeshi Ogasawara、T. Kimura、T. Ishikawa 等 5 位作者2001-03-01Physical review. B, Condensed matter
Photoinduced effects on the charge- and orbital-ordered (CO/OO) states in a layered perovskite manganite ${\mathrm{La}}_{0.5}{\mathrm{Sr}}_{1.5}{\mathrm{MnO}}_{4}$ have been investigated with femtosecond polarization-sensitive pump-probe spectroscopy. Disappearance of the optical birefringence as well as conspicuous c…
Magnetic and transport properties of perovskites and related materialsIron-based superconductors researchElectronic and Structural Properties of Oxides
Hisao Yanagi、Takayuki Morikawa、S. Hotta 等 4 位作者2001-03-01Advanced Materials
Polarized photoluminescence in orientated thin films of π-conjugated oligomers is demonstrated here. Vapor-deposited thiophene/p-phenylene co-oligomers are described and it is shown that these molecules form epitaxial needle-like crystals (see Figure). Molecular modification of the co-oligomers enables the emission co…
Organic Electronics and PhotovoltaicsLuminescence and Fluorescent MaterialsSynthesis and Properties of Aromatic Compounds
Andrzej Anderko、Patrice McKenzie、Robert Young2001-03-01CORROSION
A comprehensive model has been developed for simulating the rates of general corrosion of selected metals in aqueous solutions. The model consists of a thermophysical and an electrochemical module. The thermophysical module is used to calculate the speciation of aqueous solutions and to obtain concentrations, activiti…
Corrosion Behavior and InhibitionHydrogen embrittlement and corrosion behaviors in metalsConcrete Corrosion and Durability
Dorothee J.M. Burkhard2001-03-01Journal of Petrology
Crystallization and oxidation are usually considered as a consequence of cooling and emplacement of a magma, whereas little is known about crystallization upon reheating. However, the common eruption of basalt on the Earth and other rocky planetary bodies results in reheating at the interface. To explore the range of…
Geological and Geochemical AnalysisGlass properties and applicationsMineralogy and Gemology Studies
Hui Wu、Paula Fives‐Taylor2001-03-01Critical Reviews in Oral Biology & Medicine
Fimbriae or pili are long, filamentous, multimeric macromolecules found on the bacterial cell surface. Bacteria express a diverse array of fimbriae or pili that are involved in bacterial adherence and invasion. Fimbriae can be categorized based on their modes of expression and assembly. Type I fimbriae and P pili are…
RNA and protein synthesis mechanismsSilk-based biomaterials and applicationsBiochemical and Structural Characterization
Tzonka Mineva、Vencislav Parvanov、И А Петров 等 5 位作者2001-03-01The Journal of Physical Chemistry A
Chemical reactivity descriptors are computed by the use of three alternative approaches derived within the framework of density functional theory. These schemes consider the computation of orbital Fukui indices, where all valence orbitals are taken into account; the Fukui indices of each atom in the molecule from the…
Crystallography and molecular interactionsThermal and Kinetic AnalysisChemical Thermodynamics and Molecular Structure
P. Mott、C. M. Roland2001-03-01Rubber Chemistry and Technology
Abstract Accelerated aging experiments were carried out on a natural rubber vulcanizate exposed to air and to seawater. Failure strain, shown to correlate well with the fatigue lifetime, was used to monitor the extent of degradation. The effect of temperature on the rate of aging followed an Arrhenius law, with activa…
Polymer crystallization and propertiesPolymer Nanocomposites and Properties
Ikuya Takahashi、Mitsuhiro Hibino、Tetsuichi Kudo2001-03-01Japanese Journal of Applied Physics
A mixture of metallic vanadium, tungsten and molybdenum powder was dissolved in a hydrogen peroxide solution, to yield a polyvanadate sol containing W and Mo. A thin film of V 1- x - y W x Mo y O 2 was fabricated on a fused silica substrate by spin-coating using such a sol followed by reduction in hydrogen and success…
Gas Sensing Nanomaterials and SensorsAdvanced Memory and Neural ComputingTransition Metal Oxide Nanomaterials
John Forsyth、José M. Pereña、Rosario Benavente 等 7 位作者2001-03-01Macromolecular Chemistry and Physics
This study involves research on possible relationships between the composition of ethylene/norbornene copolymers and their thermal properties. The copolymers were fully characterised by differential scanning calorimetry (DSC), 13C NMR spectroscopy, Fourier transformation infra-red (FTIR) and Raman spectroscopy. The re…
Organometallic Complex Synthesis and CatalysisPolymer crystallization and propertiesThermal and Kinetic Analysis
Daniele Marchisio、Antonello Barresi、Rodney O. Fox2001-03-01AIChE Journal
Abstract A finite‐mode probability density function method was used with a computational fluid dynamics code to model the semibatch precipitation of barium sulfate from aqueous solutions of barium chloride and sodium sulfate in a Taylor‐Couette reactor. It was simulated in turbulent flow at high Taylor numbers under t…
Fluid Dynamics and MixingSolidification and crystal growth phenomenaCrystallization and Solubility Studies
J. Brugnerotto、Jacques Desbrières、Laurent Heux 等 5 位作者2001-03-01Macromolecular Symposia
This paper concerns the new results obtained on the characterization of chitins and chitosans. Large series of samples was analyzed covering a wide range of water soluble and insoluble materials. The water soluble polymers were obtained by heterogeneous deacetylation and by homogeneous reacetylation. The calibration o…
Nanocomposite Films for Food PackagingBiopolymer Synthesis and Applications
Junfeng Rong、Zhenhua Jing、Hangquan Li 等 4 位作者2001-03-01Macromolecular Rapid Communications
A novel organic/inorganic nanocomposite of polyethylene (PE) was prepared via in-situ coordination polymerization. The Ziegler-Natta catalyst was first supported on the surface of silicate nanowhiskers to subsequently initiate the polymerization of ethylene on the surface of these nanowhiskers. The nanowhiskers were e…
Polymer Nanocomposites and PropertiesDielectric materials and actuatorsPolymer Nanocomposite Synthesis and Irradiation
Bartosz Zawilski、R. T. Littleton、Terry M. Tritt2001-03-01Review of Scientific Instruments
In order to measure the thermal conductivity of small needlelike samples (2.0×0.05×0.1 mm3) such as pentatellurides and single carbon fibers, we have developed a new technique called the parallel thermal conductance (PTC) technique. In the more typical steady state method that is used for measuring thermal conductivit…
Advanced Thermoelectric Materials and DevicesThermal properties of materialsThermal Radiation and Cooling Technologies
Adrian Goldstein、Ygal Geffen、A. A. Gol'denberg2001-03-01Journal of the American Ceramic Society
The heating of B 4 C–YTZP (where YTZP denotes yttria‐stabilized zirconia polycrystals) mixtures, under an argon atmosphere, generates B 4 C–ZrB 2 composites, because of a low‐temperature (<1500°C) carbide–oxide reaction. Composites derived from mixtures that include ≥15% YTZP are better sintered than monolithic B 4…
Advanced ceramic materials synthesisBoron and Carbon Nanomaterials ResearchAdvanced materials and composites
Michael A. Carpenter、Ana Isabel Becerro、Friedrich Seifert2001-03-01American Mineralogist
A single Landau free energy expansion is used to describe phase transitions in perovskites, from a cubic parent structure to tetragonal and orthorhombic structures with space groups related to the M 3 and R 25 points of the Pm3̅m reciprocal lattice. This expansion permits relationships between symmetry-adapted forms o…
Ferroelectric and Piezoelectric MaterialsMicrowave Dielectric Ceramics SynthesisThermal Expansion and Ionic Conductivity
Y. Murooka、Tatsuo Takada、K. Hiddaka2001-03-01IEEE Electrical Insulation Magazine
Since the beginning of the 20th century surface discharge phenomena have been investigated form a viewpoint of scientific interest. By using both dust figure and photographic figure methods, together with the nanosecond pulse technique, the corona streamer development phenomena on an insulation surface were experiment…
High voltage insulation and dielectric phenomenaPlasma Applications and DiagnosticsPlasma Diagnostics and Applications
Lujun Pan、Taichi Hayashida、Mei Zhang Mei Zhang 等 4 位作者2001-03-01Japanese Journal of Applied Physics
The first carbon nanocoil field emitter has been prepared by catalytic thermal chemical vapor deposition and its properties of field emission have been investigated. The carbon nanocoils grow selectively from the patterned iron film and maintain their self-organization well. The field emission measurement shows that t…
Carbon Nanotubes in CompositesGraphene research and applicationsDiamond and Carbon-based Materials Research
R.R. Villapando、D. A. Graetz2001-03-01Soil Science Society of America Journal
The chemistry of P in the spodic (Bh) horizon of Florida Spodosols has generated considerable interest in recent years, particularly where water quality problems have been reported. Early studies suggested that the Bh horizon can function as a sorption sink for P moving through nonretentive sands. However, the conditi…
Soil and Water Nutrient DynamicsClay minerals and soil interactionsPhosphorus and nutrient management
Tetsuya Akiyama、Mayumi Uno、Hideki Kitaura 等 7 位作者2001-03-01Japanese Journal of Applied Physics
We have demonstrated for the first time the feasibility of using a rewritable dual-layer phase-change optical disk utilizing a blue-violet laser. For the first medium, we adopted a very thin recording layer with a new phase-change material Ge–Sn–Sb–Te, and a 10-nm-thick silver-alloy reflective layer to obtain a large…
Liquid Crystal Research AdvancementsPhase-change materials and chalcogenidesSemiconductor Lasers and Optical Devices