Junichi Miyazaki、Nobuyuki Kobashi、Makoto Nishiyama 等 4 位作者2003-01-01Journal of Biological Chemistry
Although the presence of an enzyme that catalyzes beta-decarboxylating dehydrogenation of homoisocitrate to synthesize 2-oxoadipate has been postulated in the lysine biosynthesis pathway through alpha-aminoadipate (AAA), the enzyme has not yet been analyzed at all, because no gene encoding the enzyme has been identifi…
Microbial Metabolic Engineering and BioproductionEnzyme Structure and FunctionAmino Acid Enzymes and Metabolism
Grażyna Oczko、J. Legendziewicz、V.A. Trush 等 4 位作者2003-01-01New Journal of Chemistry
A new type of lanthanide complex with a derivative of β-diketone and phenanthroline, LnPhβ3·Phen [where Phβ = CCl3–C(O)–N–P(O)–(OCH3)2; Phen = 1,10-phenanthroline, Ln = Sm, Eu, Gd, Tb] was synthesised. The X-ray diffraction analysis of the Sm(III) complex shows that it is in the monoclinic system and P21/c space group…
Luminescence Properties of Advanced MaterialsMagnetism in coordination complexesLanthanide and Transition Metal Complexes
Matthias Stender、Marilyn M. Olmstead、Alan L. Balch 等 5 位作者2003-01-01Dalton Transactions
The colorless salts [C5H10NH2][AuI(CN)2], [C4H8NH2][AuI(CN)2], [Ph2NNH3][AuI(CN)2]·H2O and [(n-C3H7)4N][AuI(CN)2]·H2O have been prepared by evaporation of aqueous solutions of potassium dicyanoaurate and the chloride salt of the appropriate cation. Hydrogen bonding between the cations and the cyano groups of the anion…
Magnetism in coordination complexesLanthanide and Transition Metal ComplexesInorganic Chemistry and Materials
John Staniforth、R. Mark Ormerod2003-01-01Green Chemistry
The response of a solid oxide fuel cell towards waste ammonia has been studied using a small tubular solid oxide fuel cell system, since ammonia is present in certain biogas in large quantities as a breakdown product of biological waste. SOFCs are not only tolerant to ammonia, but can actually utilise the ammonia pres…
Electrocatalysts for Energy ConversionAdvancements in Solid Oxide Fuel CellsAmmonia Synthesis and Nitrogen Reduction
Sujeong Lee、Youn Joong Kim、Hi‐Soo Moon2003-01-01Journal of the American Ceramic Society
For the first time, a periodicity of 14 Å is recognized as a typical modulation period in metakaolinite. Energy‐filtered electron diffraction data confirm that dehydroxylation does not occur abruptly in kaolinite. The degree of ordering becomes much lower during the progression of dehydroxylation in metakaolinite than…
Geological and Geochemical AnalysisClay minerals and soil interactionsIron oxide chemistry and applications
Kathleen Van de Velde、Paul Kiekens、Lieva Van Langenhove2003-01-01Ghent University Academic Bibliography (Ghent University)
Introduction Basalt is a natural material that is found in volcanic rocks. It is mainly used (as crushed rock) in construction, industrial and high way engineering. One can also melt basalt (1300-1700°C) and spin it into fine fibres. [1-3,5-6,8] When used as (continuous) fibres, basalt can reinforce a new range of (pl…
Natural Fiber Reinforced CompositesStructural Analysis of Composite Materials
M. M. El‐Desoky2003-01-01physica status solidi (a)
The dc electrical conductivity of 60 V2O5–(40 – x)B2O3–xBaO (x = 15, 20, 25, 30 and 40 mol%) glasses is reported in the temperature range 300–523 K. The physical and transport properties such as density, number of ions per unit volume, hopping distance, polaron radius and activation energy are reported. The electrical…
Glass properties and applicationsPhase-change materials and chalcogenidesSolid-state spectroscopy and crystallography
Aziz Dursun、Dylan Pugh、Sean G. Corcoran2003-01-01Electrochemical and Solid-State Letters
We show that the commonly accepted measurement of the critical potential for alloy dissolution calculated based on extrapolation of anodic polarization data results in an overestimation of this quantity. A series of constant applied potential experiments prove to be a more accurate method for critical potential determ…
Corrosion Behavior and InhibitionAnodic Oxide Films and NanostructuresNanoporous metals and alloys
Jörg Friedrich、Wolfgang E. S. Unger、Andreas Lippitz 等 7 位作者2003-01-01Composite Interfaces
Several approaches were investigated to produce monosort functionalized polymer surfaces with a high density and homogeneity of functional groups: (i) Plasma oxidation followed by wet-chemical reduction, (ii) formation of radicals and grafting on of functional group carrying molecules, (iii) plasma bromination followe…
Graphene research and applicationsSurface Modification and SuperhydrophobicityDiamond and Carbon-based Materials Research
Eileen J. Cox2003-01-01Botanical Journal of the Linnean Society
The identity of three naviculoid diatoms originally described by Ehrenberg and now placed in the genus Placoneis was investigated. Type specimens and material from both the Ehrenberg Collection (Berlin) and the diatom collection at the Natural History Museum, London, were examined with LM and also SEM where possible.…
Analytical chemistry methods developmentAdvanced biosensing and bioanalysis techniquesDiatoms and Algae Research
M. Umashankara、I. Ramesh Babu、Krishna N. Ganesh2003-01-01Chemical Communications
4R/S-Aminoprolines when present in the X-position of collagen peptide [pro(X)-pro(Y)-Gly]n exhibit pH- and stereochemistry-dependent effects on triplex stability.
Chemical Synthesis and AnalysisProtein Hydrolysis and Bioactive PeptidesCollagen: Extraction and Characterization
Lagomarsino, M.C.、Dogterom, M.、Marjolein Dijkstra2003-01-01Utrecht University Repository (Utrecht University)
We present computer simulations of long, thin, hard spherocylinders in a narrow planar slit. We \nobserve a transition from the isotropic to a nematic phase with quasi-long-range orientational order \nupon increasing the density. This phase transition is intrinsically two-dimensional and of the \nKosterlit…
Liquid Crystal Research AdvancementsMicrotubule and mitosis dynamicsAdvanced Materials and Mechanics
Zbigniew Zurecki、Ranajit Ghosh、John H. Frey2003-01-01Manufacturing
Although hard turning of steels has become an accepted industrial practice reducing the extent of grinding, many surface integrity aspects of hard turning require clarification. The striking result of hard turning is the tendency for forming white (non-etching) and dark (overtempered) layers at machined surface. White…
Advanced machining processes and optimizationSurface Treatment and Residual StressMetal Alloys Wear and Properties
David L. West、David A. Payne2003-01-01Journal of the American Ceramic Society
This report details development of a route to solution‐derived (1− x )Bi 1/2 Na 1/2 TiO 3 · x BaTiO 3 powders. The method developed was the citrate‐gel method—an evaporative, aqueous technique. When applied to 0.95Bi 1/2 Na 1/2 TiO 3 ·0.05BaTiO 3 (BNBT‐5), the method produced perovskite phase powders that readily dens…
Ferroelectric and Piezoelectric MaterialsMultiferroics and related materialsMicrowave Dielectric Ceramics Synthesis
Farid A. Harraz、Junji Sasano、Tetsuo Sakka 等 4 位作者2003-01-01Journal of The Electrochemical Society
Immersion plating of nickel (Ni) on a porous silicon (PS) layer has been investigated in concentrated ammonium fluoride and dilute hydrofluoric acid (HF) solutions containing When the PS sample was exposed to the bath containing 5 M and 50 mM at pH 8, metallic Ni was clearly observed at the open-circuit potential with…
Semiconductor materials and devicesSilicon Nanostructures and PhotoluminescenceNanowire Synthesis and Applications
Oleg Vasylkiv、Yoshio Sakka、В. В. Скороход2003-01-01MATERIALS TRANSACTIONS
The 0.75 to 3.0 mol% Y2O3-stabilized tetragonal ZrO2 (Y-TZP) and Al2O3/Y-TZP fine-grained ceramics with 0.2 to 0.7 mass% of alumina were produced by a colloidal technique and low-temperature sintering. Trace alumina addition enhanced the densification of Y-TZP. The influence of the resulting density, microstructure, t…
Advanced ceramic materials synthesisAdvanced materials and compositesNuclear materials and radiation effects
Jörg Friedrich、Renate Mix、Gerhard Kühn 等 6 位作者2003-01-01Composite Interfaces
This new functionalization method consists of the deposition of very thin plasma polymer layers (20 to 100 nm) of functional group bearing monomers in pulsed plasma. With allylalcohol, a maximum of 30 OH groups per 100 C atoms was measured with a selectivity of about 90% and a significant stability at long-time exposu…
Surface Modification and SuperhydrophobicityDiamond and Carbon-based Materials ResearchIon-surface interactions and analysis
Jianxi Zhu2003-01-01Chinese Science Bulletin
The orientation of HDTMA+ in the interlayer of organic pillared montmorillonites prepared at different concentrations of HDTMA+ have been studied using X-ray powder diffraction (XRD) and theoretical calculation. A series of arrangement models of HDTMA+ in the interlayer of montmorillonite have been proposed as lateral…
Polymer Nanocomposites and PropertiesConducting polymers and applicationsMesoporous Materials and Catalysis
作者信息未提供2003-01-01Kluwer Academic Publishers eBooks
The technological progress is closely related to the developments of various materials and tools made of those materials. Even the different ages have been defined in relation to the materials used. S
Material Selection and PropertiesChemical and Physical Properties of MaterialsMetallurgical and Alloy Processes
J. H. Sharp、J. Hill、N.B. Milestone 等 4 位作者2003-01-019th ASME International Conference on Radioactive Waste Management and Environmental Remediation: Volumes 1, 2, and 3
Encapsulation in cement is the favoured method in the UK for disposal of intermediate and low level radioactive wastes. It is usual to use composite cement systems incorporating blast furnace slag (BFS) or pulverised fuel ash (PFA) as these offer several advantages over Portland cement, notably a lower heat of hydrati…
Concrete and Cement Materials ResearchGraphite, nuclear technology, radiation studiesNuclear and radioactivity studies