Mengjiao Wang、Sharon Lu、Khaled Mahmud2000-05-01Journal of Polymer Science Part B Polymer Physics
Dynamic properties such as shear modulus, loss modulus, and loss factor were obtained at a low strain amplitude over a wide range of frequencies and temperatures on vulcanizates filled with carbon black, silica, and carbon–silica dual-phase filler. The data were shifted along the frequency scale. Instead of a single s…
Polymer crystallization and propertiesPolymer Nanocomposites and PropertiesForce Microscopy Techniques and Applications
T. A. Trezza、John M. Krochta2000-05-01Journal of Food Science
ABSTRACT: Water‐based whey protein isolate (WPI) coatings had the same gloss as shellac and zein coatings cast from ethanol solutions and water‐based tapioca dextrin and hydroxypropyl methylcellulose (HPMC) coatings. For lipid dispersion coatings, the particle size of the dispersed phased influenced gloss values. WPI…
Meat and Animal Product QualityProteins in Food SystemsNanocomposite Films for Food Packaging
A. Naidja、Pan Huang、Jean‐Marc Bollag2000-05-01Journal of Environmental Quality
Abstract Soil is a living system in which enzymes are present either free in solution or bound to clay and clay‐humus complexes. Enzyme‐clay interactions play a key role in transforming organic compounds in soil environments where the decomposition and synthetic processes are largely catalyzed by enzymes. Scientific e…
Pesticide and Herbicide Environmental StudiesClay minerals and soil interactionsPorphyrin Metabolism and Disorders
Maël Nicolas、Bruno Fabre、Gilles Marchand 等 4 位作者2000-05-01European Journal of Organic Chemistry
New electropolymerizable aromatic compounds (i.e. pyrrole, thiophene, aniline) bearing boronic acid and ester substituents have been synthesized and their electrochemical behavior has been investigated. Functionalized polythiophene and polypyrrole films could be anodically generated in acetonitrile, whereas the polyan…
Conducting polymers and applicationsLuminescence and Fluorescent MaterialsAnalytical Chemistry and Sensors
Hotze Wijnja、Cristian P. Schulthess2000-05-01Soil Science Society of America Journal
The presence of anionic cosolutes often influences anion adsorption on soil mineral surfaces. The possible effect of common solutes, such as CO 3 species, on the adsorption of other anions on metal (hydr)oxides is poorly understood. Accordingly, we determined the effect of CO 3 , formate, acetate, oxalate, and citrate…
Clay minerals and soil interactionsMine drainage and remediation techniquesGeochemistry and Geologic Mapping
A.B. Kulinkin、S.P. Feofilov、R. I. Zakharchenya2000-05-01Physics of the Solid State
The 2 E - 4 A 2 luminescence spectra of Cr 3+ ions in Al 2 O 3 are investigated in the course of transitions between the structural forms γ-δ-θ-α. The spectral lines observed are assigned to Cr 3+ ions in these structural forms, which are identified by an X-ray powder diffraction analysis. The lifetimes of the Cr 3+ e…
Luminescence Properties of Advanced MaterialsSolid-state spectroscopy and crystallographyNuclear materials and radiation effects
Wolfgang Bleck、Ingo Schael2000-05-01Steel Research
The mechanical properties of eight different steels, representing the wide range of steels for automotive application, are determined by accomplishing high speed tensile tests using flat sheet specimens. The steels chosen for investigations are deep drawing grade DC04, high strength steel ZStE340, three dual phase ste…
Microstructure and Mechanical Properties of SteelsMetal Forming Simulation TechniquesHigh-Velocity Impact and Material Behavior
Gerbrand Ceder、Anton Van der Ven、Chris A. Marianetti 等 4 位作者2000-05-01Modelling and Simulation in Materials Science and Engineering
The physical mechanisms which may contribute to the energy and entropy of mixing in oxide systems are identified and discussed. Ionic size, magnetism and electrostatics can all contribute to the configurational energy dependence of transition-metal oxides. While the many sources of substitutional disorder make configu…
Magnetic and transport properties of perovskites and related materialsMachine Learning in Materials ScienceElectronic and Structural Properties of Oxides
Sung‐Tag Oh、Kenichi Tajima、Motohide Ando 等 4 位作者2000-05-01Journal of the American Ceramic Society
Porous Al 2 O 3 and SiC–dispersed‐Al 2 O 3 (Al 2 O 3 /SiC) nanocomposites with improved mechanical properties were fabricated using pulse electric current sintering (PECS). Microstructures with fine grains and enhanced neck growth, as well as high fracture strength, could be achieved via PECS of Al 2 O 3 . The incorpo…
Advanced ceramic materials synthesisAluminum Alloys Composites PropertiesAdvanced materials and composites
S. Henry、Julie Mougin、Y. Wouters 等 5 位作者2000-05-01Materials at High Temperatures
Scanning electron microscopy, X-ray diffraction, photoelectrochemistry and microphotoelectrochemistry have been used to characterize thin chromia scales, in the micrometer range, grown on pure chromium at 900°C in oxygen and in water vapour. The duplex structure formed, more easily observable in water vapour grows by…
Catalytic Processes in Materials ScienceElectron and X-Ray Spectroscopy TechniquesElectronic and Structural Properties of Oxides
Mehdi Barikani、Shahram Mehdipour‐Ataei2000-05-01Journal of Polymer Science Part A Polymer Chemistry
A new aromatic sulfone ether diamine was synthesized by nucleophilic aromatic substitution reaction of 5-amino-1-naphthol with bis(4-chlorophenyl) sulfone in the presence of potassium carbonate in a polar aprotic solvent. Polycondensation reactions of the obtained diamine with pyromellitic dianhydride (PMDA), benzophe…
Epoxy Resin Curing ProcessesSynthesis and properties of polymersTribology and Wear Analysis
Donald E. Ward、Servé W. M. Kengen、John van der Oost 等 4 位作者2000-05-01Journal of Bacteriology
Alanine aminotransferase (AlaAT) was purified from cell extracts of the hyperthermophilic archaeon Pyrococcus furiosus by multistep chromatography. The enzyme has an apparent molecular mass of 93.5 kDa, as estimated by gel filtration, and consists of two identical subunits of 46 kDa, as deduced by sodium dodecyl sulfa…
Enzyme Structure and FunctionPolyamine Metabolism and ApplicationsAmino Acid Enzymes and Metabolism
Ziyuan Yang2000-05-01Journal of Physics Condensed Matter
The quantificational relationship between the EPR zero-field splitting parameter D and the structure parameters of the tetragonal Cr 3+ centre in RbCdF 3 :Cr 3+ crystals has been established according to the superposition model and third-order perturbation theory. The existence of the Cd 2+ vacancy and the lattice dis…
Luminescence Properties of Advanced MaterialsGlass properties and applicationsSolid State Laser Technologies
Silke Fiedler、Alexander Steinbüchel、Bernd H. A. Rehm2000-05-01Applied and Environmental Microbiology
Recently, a new metabolic link between fatty acid de novo biosynthesis and biosynthesis of poly(3-hydroxy-alkanoate) consisting of medium-chain-length constituents (C(6) to C(14)) (PHA(MCL)), catalyzed by the 3-hydroxydecanoyl-[acyl-carrier-protein]:CoA transacylase (PhaG), has been identified in Pseudomonas putida (B…
Enzyme Catalysis and Immobilizationbiodegradable polymer synthesis and propertiesBiopolymer Synthesis and Applications
Alfred Ludwig、Eckhard Quandt2000-05-01Journal of Applied Physics
Sputter-deposited giant magnetostrictive thin films allow the realization of microactuators and sensors which can be addressed by remote control operation. Applications reviewed in this article are in the field of microelectromechanical systems (MEMS), e.g., microfluidic devices, micromotors, laser scanner mirrors etc…
Magnetic properties of thin filmsMetallic Glasses and Amorphous AlloysMagnetic Properties and Applications
Stefan Mecking、Ralf Thomann、Holger Frey 等 4 位作者2000-05-01Macromolecules
Transition metal clusters and colloids of narrow particle size distributions in the range 1-10 nm are currently subject to intense research efforts.1 From a fundamental perspective, the transition from the properties of the bulk to those of molecular clusters is expected to occur in this size range. A transition metal…
Advanced biosensing and bioanalysis techniquesRNA Interference and Gene DeliveryDendrimers and Hyperbranched Polymers
Daniel R. Evans、Christopher A. Reed2000-05-01Journal of the American Chemical Society
Contrary to expectations based on the spectrochemical series, H 2 O is found to be a significantly weaker field ligand than OH - in the magnetochemical series ranking of ligand field strengths based on the spin states of iron(III) tetraphenylporphyrin complexes. The preparation and characterization of the [Fe(H 2 O)(T…
Porphyrin and Phthalocyanine ChemistryHemoglobin structure and functionPorphyrin Metabolism and Disorders
W. Robert Scheidt、H. Duval、T.J. Neal 等 4 位作者2000-05-01Journal of the American Chemical Society
The preparation and molecular structures of several five-coordinate (nitrosyl)iron(II) porphyrinate derivatives are described. The derivatives reported include two crystalline forms of [Fe(OEP)(NO)] (OEP = 2,3,7,8,12,13,17,18-octaethylporphyrin dianion), three conformationally distinct forms of [Fe(TPPBr 4 )(NO)] (TPP…
Nitric Oxide and Endothelin EffectsPorphyrin and Phthalocyanine ChemistryHemoglobin structure and function
PA Cunningham、Amod A. Ogale、Paul Dawson 等 4 位作者2000-05-01Journal of Food Science
ABSTRACT: Soy protein isolate (SPI) was utilized as a biopolymer and glycerol was used as a plasticizer to successfully produce light‐yellow, transparent protein films by a thermal compaction technique. Flexible films, approximately 180 micrometers, could be produced at a processing temperature of 150 °C and compactio…
Food composition and propertiesNanocomposite Films for Food Packagingbiodegradable polymer synthesis and properties
Xuedong Bai、Jiandong Guo、Jie Yu 等 6 位作者2000-05-01Applied Physics Letters
Large-area highly oriented boron carbonitride (BCN) nanofibers with various compositions were synthesized directly on polished polycrystalline nickel substrates from a gas mixture of N2, H2, CH4, and B2H6 by bias-assisted hot-filament chemical-vapor deposition. The morphology of BCN nanofibers was examined by scanning…
Carbon Nanotubes in CompositesGraphene research and applicationsBoron and Carbon Nanomaterials Research