Masaru Goto、I. Miyahara、Hideyuki Hayashi 等 5 位作者2003-03-15Biochemistry
Branched-chain amino acid aminotransferase (BCAT), which has pyridoxal 5'-phosphate as a cofactor, is a key enzyme in the biosynthetic pathway of hydrophobic amino acids (leucine, isoleucine, and valine). The enzyme reversibly catalyzes the transfer of the amino group of a hydrophobic amino acid to 2-oxoglutarate to f…
RNA and protein synthesis mechanismsEnzyme Structure and FunctionProtein Structure and Dynamics
Zhibin Ye、Shiping Zhu2003-03-15Macromolecules
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTNewtonian Flow Behavior of Hyperbranched High-Molecular-Weight Polyethylenes Produced with a Pd−Diimine Catalyst and Its Dependence on Chain TopologyZhibin Ye and Shiping ZhuView Author Information Department of Chemical Engineering…
Dendrimers and Hyperbranched PolymersPolymer Surface Interaction StudiesSynthetic Organic Chemistry Methods
Ger J. M. Koper、René C. van Duijvenbode、Danny Stam 等 5 位作者2003-03-15Macromolecules
Comblike poly(ethyleneimine) (PEI) with −(CH 2 CH 2 )N(CH 2 CH 2 NH 2 )− as the repeating unit has been synthesized by employing a protecting group strategy, and analyzed by potentiometric titration. If the degree of protonation is plotted as a function of pH, the titration curve shows three protonation steps separate…
Fuel Cells and Related MaterialsAdvanced Polymer Synthesis and CharacterizationDendrimers and Hyperbranched Polymers
Oleg Sitdikov、Rustam Kaibyshev、Taku Sakai2003-03-15Materials science forum
Mechanism of dinamic recrystallization (DRX) associated with twinning are proposed and discussed on the results of microstructure evolution during warm and hot deformation of a coarse-grained Mg
Magnesium Alloys: Properties and ApplicationsMicrostructure and mechanical propertiesMetallurgy and Material Forming
Sung-Won Ha、Young H. Park、Samuel M. Hudson2003-03-15Biomacromolecules
There are still several problems associated with the spinning of dialyzed silk fibroin solutions. In this work some of these problems have been examined. The calcium nitrate tetrahydrate-methanol system was used to dissolve the silk fibroin. A compositional phase diagram was constructed at various concentrations of th…
Surface Modification and SuperhydrophobicitySilk-based biomaterials and applicationsSilkworms and Sericulture Research
James Brown、Thomas S. Walter、L. Carter 等 34 位作者2003-03-15Journal of Applied Crystallography
An initial tranche of results from day-to-day use of a robotic system for setting up 100 nl-scale vapour-diffusion sitting-drop protein crystallizations has been surveyed. The database of over 50 unrelated samples represents a snapshot of projects currently at the stage of crystallization trials in Oxford research gro…
Protein purification and stabilityEnzyme Structure and FunctionProtein Structure and Dynamics
Howard Wang、Erik K. Hobbie2003-03-15Langmuir
Single-walled carbon nanotubes (SWNTs) are insoluble in either water or oil. When mixtures of SWNTs, water, and toluene are sheared vigorously, a macroscopic emulsion of water droplets forms in toluene, with the SWNTs residing at the interface between the immiscible fluids, acting as a natural “surfactant” or interpha…
Pickering emulsions and particle stabilizationSurface Modification and SuperhydrophobicityCarbon Nanotubes in Composites
Hiromi Taniguchi、M. Miyashita、Kenichi Uchiyama 等 10 位作者2003-03-15Journal of the Physical Society of Japan
We demonstrate that an organic Mott insulator, β'-(BEDT-TTF) 2 ICl 2 , is metallized by application of extremely high pressure by means of the cubic anvil press. When the metallic state is stabilized, superconductivity with the highest transition-temperature ( T c ) among the organic systems appears. The lower limit o…
Rare-earth and actinide compoundsOrganic and Molecular Conductors ResearchMagnetism in coordination complexes
Thomas A. Luther、Frederick F. Stewart、Joanne Budzien 等 8 位作者2003-03-15The Journal of Physical Chemistry B
Comprehensive investigation of lithium ion complexation with 15 N-labeled polyphosphazenes 15 N -poly[bis(2-(2-methoxyethoxy)ethoxy)phosphazene] ( 15 N -MEEP) and 15 N -poly-[((2-allylphenoxy) 0.12 (4-methoxyphenoxy) 1.02 (2-(2-methoxyethoxy)ethoxy) 0.86 )phosphazene] ( 15 N -HPP) was performed by NMR, IR, and Raman s…
Advanced Battery Materials and TechnologiesFlame retardant materials and propertiesPolymer crystallization and properties
Olivier Spalla、Sandrine Lyonnard、Fabienne Testard2003-03-15Journal of Applied Crystallography
Using X-ray scattering over a large range of scattering vectors, it is shown how to measure both the pore volume fraction and pore specific surface of an assembly of porous grains forming a powder. Depending on the presence or not of solvent in the inner pores and in the intergranular media, the scattered signal per u…
X-ray Diffraction in CrystallographyCultural Heritage Materials AnalysisRadiation Shielding Materials Analysis
Masao Takahashi、Kenn Kubo2003-03-15arXiv
Applying the dynamical coherent potential approximation to a simple model, we have systematically studied the carrier states in $A_{1-x}$Mn$_xB$-type diluted magnetic semiconductors (DMS's). The model calculation was performed for three typical cases of DMS's: The cases with strong and moderate exchange interactions i…
Materials Science
Gabriella S. Métraux、Y. Charles Cao、Rongchao Jin 等 4 位作者2003-03-15OpenAlex
Silver nanoprisms (∼74-nm edge length) were etched with HAuCl 4 to generate gold−silver alloy framework structures. Interestingly, these triangular nanoframes possess no strong surface plasmon bands in the ultraviolet or visible regions of the optical spectrum. By adding a mild reducing agent, l -ascorbic acid, gold a…
Nanoporous metals and alloysGold and Silver Nanoparticles Synthesis and ApplicationsPlasmonic and Surface Plasmon Research
Marcus A. Neumann2003-03-15OpenAlex
X-Cell is a novel indexing algorithm that makes explicit use of systematic absences to search for possible indexing solutions from cells with low numbers of calculated reflections to cells with high numbers of reflections. Space groups with the same pattern of systematic absences are grouped together in powder extinct…
Crystallography and molecular interactionsMachine Learning in Materials ScienceX-ray Diffraction in Crystallography
Shu Peng、Kyeongjae Cho2003-03-15OpenAlex
Recently great advances have been made in demonstrating the viability of using carbon nanotubes (CNTs) to detect the presence of chemical gases such as NO 2, NH 3, and O 2, and they have led to the design of a new breed of sensor devices. Based on intrinsic CNTs, the devices are capable of detecting small concentratio…
Nanopore and Nanochannel Transport StudiesCarbon Nanotubes in CompositesMechanical and Optical Resonators
Vaidyanathan Subramanian、Eduardo E. Wolf、Prashant V. Kamat2003-03-15OpenAlex
Photoinduced electron accumulation in ZnO nanoparticles results in the bleaching of the exciton band as well as quenching of green emission. In the absence of an electron scavenger, photogenerated electrons are stored near the conduction band edge and promote charge recombination via a nonradiative process. By exposin…
Quantum Dots Synthesis And PropertiesCopper-based nanomaterials and applicationsZnO doping and properties
Jeffrey L. Dalsin、Bi−Huang Hu、Bruce P. Lee 等 4 位作者2003-03-15OpenAlex
A new biomimetic strategy for modification of biomaterial surfaces with poly(ethylene glycol) (PEG) was developed. The strategy exploits the adhesive characteristics of 3,4-dihydroxyphenylalanine (DOPA), an important component of mussel adhesive proteins, to anchor PEG onto surfaces, rendering the surfaces resistant t…
Marine Biology and Environmental ChemistryPolymer Surface Interaction StudiesKnee injuries and reconstruction techniques
A. J. M. Duisenberg、Loes M. J. Kroon-Batenburg、A.M.M. Schreurs2003-03-15OpenAlex
A reflection intensity integration method is presented based upon ab initio calculation of three-dimensional ( x , y , ω) reflection boundaries from a few physical crystal and instrument parameters. It is especially useful in challenging circumstances, such as the case of a crystal that is far from spherical, anisotro…
Solid-state spectroscopy and crystallographyAcoustic Wave Resonator TechnologiesX-ray Diffraction in Crystallography
David Norvil Brown、Baomin Ma、Zhongmin Chen2003-03-14ChemInform
Abstract For Abstract see ChemInform Abstract in Full Text.
Hydrogen Storage and MaterialsMagnetic Properties of AlloysMagnetic and transport properties of perovskites and related materials
Jurgen Sleven、Thomas Cardinaels、Christiane Görller‐Walrand 等 4 位作者2003-03-14ARKIVOC
Cobalt(II), nickel(II), copper(II) and zinc(II) phthalocyanines substituted by eight alkoxy chains in the peripheral (2,3,9,10,16,17,23,24) positions were prepared. The alkoxy chain lengths are octyloxy (C 8 H 17 O), dodecyloxy (C 12 H 25 O) and hexadecyloxy (C 16 H 33 O). Studies by polarized optical microscopy and h…
Magnetism in coordination complexesPorphyrin and Phthalocyanine ChemistryPhotochemistry and Electron Transfer Studies
Qiang Fu、Thomas Wagner2003-03-14Physical Review Letters
A diffusion-corrected simultaneous multilayer (DCSM) model was developed, taking into account up-step and down-step diffusion of adatoms and enabling rapid identification of different film growth modes. This DCSM model was applied to the initial growth of Cr on (100) ${\mathrm{S}\mathrm{r}\mathrm{T}\mathrm{i}\mathrm{O…
Electron and X-Ray Spectroscopy TechniquesSemiconductor materials and devicesSurface and Thin Film Phenomena