Daniel S. Garrett、G. Marius Clore、Angela M. Gronenborn 等 5 位作者1998-03-01Protein Science
The phosphorylated form of the N-terminal domain of enzyme I of the phosphoenolpyruvate:sugar phosphotransferase system of Escherichia coli has been investigated by one-bond and long-range 1H-15N correlation spectroscopy. The active site His 189 is phosphorylated at the Nepsilon2 position and has a pKa of 7.3, which i…
Protein Structure and DynamicsRNA and protein synthesis mechanismsEnzyme Structure and Function
Daniel R. Bond、James B. Russell1998-03-01Applied and Environmental Microbiology
When the rate of glucose addition to nongrowing Streptococcus bovis cell suspensions was increased, the fermentation was homolactic, fructose-1,6-diphosphate (FDP) increased, intracellular inorganic phosphate (P(i)) declined, and the energy-spilling rate increased. ATP and ADP were not significantly affected by glucos…
Protein purification and stabilityEnzyme Structure and FunctionBiochemical and Molecular Research
Tao Wang、D. C. Li、Jing Bai 等 5 位作者1998-03-01Journal of Macromolecular Science Part A
Silica supported methyltrioxorhenium complex of γ-(2,2′-dipyridyl)-aminopropyl polysiloxane (III) has been synthesized and demonstrated as a novel catalyst of high activity, stability and improved selectivity for epoxidation of alkenes with hydrogen peroxide at room temperature. The catalyst can be recycled at least f…
Metal-Organic Frameworks: Synthesis and ApplicationsPorphyrin and Phthalocyanine ChemistryPolyoxometalates: Synthesis and Applications
Yi-Ming Chen、Pei-Wen Kuo1998-03-01IEEE Transactions on Magnetics
The crystallization process of the Ag or Cu doped Sb/sub 2/Te/sub 3/ amorphous film was investigated by isothermal treatment for one hour at 100/spl deg/C, 200/spl deg/C and 300/spl deg/C respectively. The crystallization temperatures of Ag/sub 8.3/Sb/sub 34.9/Te/sub 56.8/ and Cu/sub 8.4/Sb/sub 35.1/Te/sub 56.5/ films…
Chalcogenide Semiconductor Thin FilmsPhase-change materials and chalcogenidesOptical and Acousto-Optic Technologies
D. J. Keavney、Eric E. Fullerton、Dongqi Li 等 8 位作者1998-03-01Physical review. B, Condensed matter
Soft x-ray magnetic circular dichroism (MCD) data were collected at the Co $L$ edges from a series of epitaxial $R\ensuremath{-}\mathrm{Co}$ ($R=\mathrm{P}\mathrm{r},\phantom{\rule{0ex}{0ex}}\mathrm{N}\mathrm{d},\phantom{\rule{0ex}{0ex}}\mathrm{S}\mathrm{m},\phantom{\rule{0ex}{0ex}}\mathrm{D}\mathrm{y},\phantom{\rule{…
Magnetic properties of thin filmsRare-earth and actinide compoundsMagnetic Properties of Alloys
R. E. Lobnig、C. A. Jankoski1998-03-01Journal of The Electrochemical Society
Basic copper sulfates, , and cuprite, , are the major corrosion products found during field exposure of copper. The active species of the atmosphere which lead to formation of these corrosion products are, however, still uncertain. In this study, we investigated whether submicron acid ammonium sulfate particles, , can…
Corrosion Behavior and InhibitionConcrete Corrosion and DurabilitySmart Materials for Construction
P. Tenant、Jean Jacques Rousseau1998-03-01IEEE Transactions on Power Electronics
A behavioral model of magnetic materials is presented. This model takes into account both hysteresis and dynamic phenomena. It predicts B(H), /spl phi/(t) and d/spl phi/(t)/dt characteristics, and a few pieces of experimental data are needed to identify its parameters. In this paper, the authors propose to validate th…
Magnetic properties of thin filmsMagnetic Properties and ApplicationsNon-Destructive Testing Techniques
Mathias O. Senge1998-03-01Journal of Porphyrins and Phthalocyanines
Porphyrins with steric hindrance at the periphery are known to exhibit severely non-planar macrocycle conformations. Among other dodecasubstituted porphyrins, the title compound has been studied widely and shows a typical saddle-distorted macrocycle. The specific conformation of the porphyrin leads to the formation of…
Porphyrin and Phthalocyanine ChemistryNeonatal Health and BiochemistryPorphyrin Metabolism and Disorders
Samuel C. Barden、James A. Arns、W. S. Colburn1998-03-01OpenAlex
A diffraction grating technology based upon volume-phase holograms shows promise of enhanced performance for many applications in astronomical spectroscopy over classical surface-relief grating technology. We present a discussion of the underlying physics of a volume-phase grating, give some theoretical performance ch…
Photorefractive and Nonlinear OpticsAdaptive optics and wavefront sensingOptical Coatings and Gratings
Giorgio Donzella、M Scepi、Luigi Solazzi 等 4 位作者1998-03-01Proceedings of the Institution of Mechanical Engineers Part F Journal of Rail and Rapid Transit
A finite element, numerical model of a solid railway wheel was perfected permitting the simulation of a block braking operation. The analyses performed, backed by experimental tests, permitted the degree of variation in the residual stress state (induced by differential quenching heat treatment and successive temperin…
Railway Engineering and DynamicsMechanical stress and fatigue analysisMetal Alloys Wear and Properties
Patrick Umbach、Yannis Georgalis、Wolfram Saenger1998-03-01Journal of the American Chemical Society
Hen egg white lysozyme was employed for studying aggregation and nucleation events induced by simple electrolytes such as NaCl while the process was monitored by time-resolved, small-angle static light scattering. The fractal dimension, the weight-average molecular weight, the mean radius of gyration and the homogenei…
Spectroscopy and Quantum Chemical StudiesCrystallization and Solubility StudiesProtein Interaction Studies and Fluorescence Analysis
T. R. Jack、M. Wilmott、J. Stockdale 等 6 位作者1998-03-01CORROSION
Microbial corrosion scenarios based on the action of sulfate-reducing bacteria (SRB) under disbonded tape coatings on the outside of gas pipelines have been described previously. Secondary oxidation of these sites leads to formation of unique corrosion products. These have been associated with serious corrosion damage…
Corrosion Behavior and InhibitionOdor and Emission Control TechnologiesConcrete Corrosion and Durability
Dierk Raabe1998-03-01Philosophical magazine. A/Philosophical magazine. A. Physics of condensed matter. Structure, defects and mechanical properties
A concept is outlined to incorporate dislocation climb in a discrete three-dimensional model of dislocation dynamics. Each dislocation line consists of a sequence of interconnected piecewise straight segments which are embedded in a homogeneous linear elastic medium. The dynamics are described by solving Newton's equa…
Microstructure and mechanical propertiesAluminum Alloy Microstructure PropertiesHigh Temperature Alloys and Creep
Chak K. Chan、Richard C. Flagan、John H. Seinfeld1998-03-01Journal of the American Ceramic Society
The electrodynamic balance (EDB) is demonstrated to be useful for the in situ study of aqueous droplet solidification. We have used an EDB to study the solidification of solution droplets used for ceramic powder synthesis by spray pyrolysis. The mass change and the elastic light scattering of the drying 20 μm solution…
Calcium Carbonate Crystallization and InhibitionChemical Looping and Thermochemical ProcessesThermal and Kinetic Analysis
Ana Cuesta、P. Dhamelincourt、J. Laureyns 等 5 位作者1998-03-01Applied Spectroscopy
High-modulus and high-strength carbon fibers were submitted to oxidation plus sizing and grinding treatments. Subsequent changes at the fiber surfaces were studied by Raman spectrometry. X-ray diffractograms and Raman spectra of the fresh fibers were compared with those of other carbon materials with different graphit…
Carbon Nanotubes in CompositesGraphene research and applicationsDiamond and Carbon-based Materials Research
Eric D. Rodeghiero、C. J. Moore、B.S Wolkenberg 等 6 位作者1998-03-01Materials Science and Engineering A
Sol–gel techniques have been used to produce various high temperature ceramic matrix composites including Ni/α-Al2O3, Fe/α-Al2O3, Ni/ZrO2, SiC(whisker)/α-Al2O3, and SiC(platelet)/α-Al2O3, as well as chemically modified versions of some of these systems. In all cases, the composites have displayed uniform microstructur…
Advanced ceramic materials synthesisAdvanced materials and compositesNuclear materials and radiation effects
Youssef Nassiri、Jean‐Michel Robert、Yves Rincé 等 4 位作者1998-03-01Phycologia
The fine structure of Haslea ostrearia Simonsen, a diatom that is able to synthesize a blue pigment (marennine), is described. Ultrastructurally, this microalga has a typical naviculoid organization, but marked changes occur depending on the stage of cell blueing by accumulation of marennine. A comparison of the ultra…
Algal biology and biofuel productionMass Spectrometry Techniques and ApplicationsDiatoms and Algae Research
V. Hershko、David W. Weisman、A. Nussinovitch1998-03-01Journal of Food Science
ABSTRACT Surface topography and roughness of garlic and onion skins were studied by atomic force microscopy in order to estimate the surface area. Image‐processing and Arc/Info software were used to interpret the data. The calculated ratio between apparent and measured surfaces (roughness factor) deviated from 1.11 to…
Surface Modification and SuperhydrophobicityPhotonic Crystals and ApplicationsDyeing and Modifying Textile Fibers
Michael H. Fisch、Radu Bacaloglu1998-03-01Journal of Vinyl and Additive Technology
Abstract The glass transition temperatures of PVC containing stearic acid derivatives as lubricants have been used to define two new parameters of lubrication: the saturation concentration and the efficiency constant . The saturation concentration represents the maximum amount of lubricant compatible with PVC in a spe…
Advanced Polymer Synthesis and CharacterizationPolymer Nanocomposites and PropertiesPolymer Science and PVC
Xiaoqing Pan、Wayne D. Kaplan、M. Rühle 等 4 位作者1998-03-01Journal of the American Ceramic Society
Different transmission electron microscopy techniques have been compared for the detection and size measurements of ordered regions on a nanometer scale in a disordered matrix phase. As a model system, the perovskite lead magnesium niobate doped with varying amounts of La has been chosen for the present study. While s…
Ferroelectric and Piezoelectric MaterialsMultiferroics and related materialsElectronic and Structural Properties of Oxides