William Levason、Mark D. Spicer、Michael Webster1988-01-01Journal of the Chemical Society Dalton Transactions
The structure of Na5[Cu{TeO4(OH)2}2]·16H2O has been determined by X-ray structure analysis. It crystallises in the triclinic space group P with a= 5.922(4), b= 8.939(2), c= 12.528(2)Å, α= 98.45(1), β= 99.11(3), γ= 93.82(4)°, and Z= 1. The structure was refined to R= 0.040 for 2 131 observed reflections [F > 3σ(F)]. Th…
Crystal Structures and PropertiesChemical and Physical Properties in Aqueous SolutionsThermal and Kinetic Analysis
Franz Gähler1988-01-01OpenAlex
A detailed model structure of dodecagonal quasicrystals is proposed which applies to both dodecagonal Ni-Cr and V-Ni or V-Si-Ni. This model structure can be represented as the restriction of a 5d periodic structure to a 3d subspace, which is identified with physical space. The point group and the space group of the 5d…
Quasicrystal Structures and PropertiesMineralogy and Gemology Studies
Michael J. Readey、A. H. Heuer、R. W. Steinbrech1988-01-01Journal of the American Ceramic Society
The peak toughness of a commercial magnesia‐partially‐stabilized zirconia was strongly dependent on a postprocessing, postspecimen preparation, and modest annealing (1000°C for 20 min), increasing it from ∼9 to almost ∼18 MP a·m 1/2 . Further study of this surprising phenomenon revealed that increases in toughness occ…
Advanced ceramic materials synthesisAdvanced materials and compositesNuclear materials and radiation effects
M. Imamura、Tadashi Sasaki1988-01-01Physica Scripta
Magnetostriction in modern (110)[001] grain-oriented Si-Fe sheets can be understood by considering magnetic domain structures and their variation with magnetization on the basis of magnetic domain theory. Magnetostrictive elongation in g.o. sheets is dominated by the behavior of 90° domain walls included in subdomains…
Magnetic properties of thin filmsMicrostructure and Mechanical Properties of SteelsMagnetic Properties and Applications
Kiyoshi Nogi、Kazumi Ogino1988-01-01Transactions of the Japan Institute of Metals
The wettabilities of α-SiC, hot pressed SiC, and reaction bonded SiC by liquid Cu were investigated using the sessile drop method under various experimental conditions.The main results obtained are summarized as follows:(1) The contact angle of liquid Cu on SiC depended on SiC used.(2) The characteristic wetting was o…
Advanced ceramic materials synthesisSurface Modification and SuperhydrophobicityCopper Interconnects and Reliability
Laurent Limat1988-01-01Physical review. B, Condensed matter
The elastic problem in two-dimensional percolation is investigated on a hierarchical lattice, in the context of Cosserat elasticity (or granular elasticity). For this regular fractal, the exponent of elastic moduli ($\frac{T}{v}$) is slightly smaller than the expected value ($\frac{t}{v}+2$) deduced from the conductiv…
Composite Material MechanicsThermoelastic and Magnetoelastic PhenomenaNonlocal and gradient elasticity in micro/nano structures
N. V. Dergunova、E. G. Fesenko、V. P. Sakhnenko1988-01-01Ferroelectrics
Distribution of doping cations between A and B sites of perovskite ABO3 structure obeys certain conditions derived in terms of energy. These can be applied to predict semiconducting BaTiO3-based compositions, to account for yet unexplained anomalies in concentrational dependencies of electrical resistivity and Curie t…
Ferroelectric and Piezoelectric MaterialsMagnetic and transport properties of perovskites and related materialsElectronic and Structural Properties of Oxides
Youichi Murakami、T. Mura、Motoyasu Kobayashi1988-01-01OpenAlex
Dislocation structures in fatigue were investigated with special consideration given to the compatibility of the macroscopic observation by an optical microscope and the microscopic observation by a transmission electron microscope (TEM). First, previous works are reviewed from this point of view, that is, the compata…
Metal and Thin Film MechanicsIntermetallics and Advanced Alloy PropertiesMetallurgical and Alloy Processes
David R. Rose、J. Phipps、J.J. Michniewicz 等 8 位作者1988-01-01Protein Engineering Design and Selection
The polypeptide produced by expressing a chemically synthesized gene coding for the amino-acid sequence of T4-lysozyme has been crystallized and subjected to X-ray diffraction. The crystal structure has been refined to a standard R-factor of 0.191 for data between 8 and 2 A resolution. The refined model is essentially…
Escherichia coli research studiesEnzyme Structure and Function
Stephen R. Sprang、Robert J. Fletterick、László Gráf 等 5 位作者1988-01-01Critical Reviews in Biotechnology
We are probing the determinants of catalytic function and substrate specificity in serine proteases by kinetic and crystallographic characterization of genetically engineered site-directed mutants of rat trypsin. The role of the aspartyl residue at position 102, common to all members of the serine protease family, has…
Protein Kinase Regulation and GTPase SignalingEnzyme Structure and FunctionEnzyme Production and Characterization
Hiroshi Nagai、Katsu Kitagaki、Keiichirô Shôji1988-01-01Transactions of the Japan Institute of Metals
The effect of Zr addition to FeTi on the initial hydriding process, the pressure-composition isotherms and the microstructure was investigated. The partial substitution of Zr (1∼15 at%) for Fe, Ti or both enhanced the activation of FeTi and it hydrided at 303 K after a short incubation time without any heat treatment.…
Hydrogen Storage and MaterialsNuclear Materials and PropertiesCatalysis and Hydrodesulfurization Studies
Richard Gordon、Baltazar D. Aguda1988-01-01Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society
Diatom shells are intricate structures made by single algal cells with a spacing between parts of about 0.1 mu m. They appear to be formed by instabilities in diffusion-limited precipitation of amorphous, colloidal silica. The patterns are apparently modified by surface diffusion during their formation. They present a…
Theoretical and Computational PhysicsDiatoms and Algae ResearchSlime Mold and Myxomycetes Research
John Kieffer、Jeff Wagner1988-01-01Journal of The Electrochemical Society
The ac conductivity of nickel oxide‐metal composites has been investigated as a function of the nature and concentration of the metal, the temperature, and the oxygen partial pressure. Inversion layers which form around the metal particles represent regions of n‐type conduction in the p‐type bulk. Beyond the percolati…
High voltage insulation and dielectric phenomenaTheoretical and Computational PhysicsElectrostatics and Colloid Interactions
Masahiko Ikeda、Shin-ya Komatsu、Takashi Sugimoto 等 4 位作者1988-01-01Journal of the Japan Institute of Metals and Materials
Negative temperature dependence (NTD) of electrical resistivity (ρ) was investigated on several Ti-Nb alloys quenched from 1073 K in relation to α″ martensite and athermal ω phases.The estimation of starting and ending temperatures of the athermal ω formation, ωs and ωf, respectively, was attempted with special care t…
Microstructure and Mechanical Properties of SteelsIntermetallics and Advanced Alloy PropertiesTitanium Alloys Microstructure and Properties
Yuji Kurata、Yutaka Ogawa、Hajime Nakajima1988-01-01鐵と鋼 : 日本鐡鋼協會々誌
Creep tests were conducted on Ni-base heat-resistant alloys Hastelloy XR and XR-II, i. e. versions of Hastelloy X modified for nuclear applications, at 950°C using four types of helium environment with different impurity compositions, and mainly the effect of carburization was examined.For all the materials tested, th…
Fusion materials and technologiesHigh Temperature Alloys and CreepNuclear Materials and Properties
John E. Botzolakis、Larry L. Augsburger1988-01-01Drug Development and Industrial Pharmacy
The wicking and swelling properties of pure disintegrants were investigated from plugs prepared under conditions similar to those used in encapsulation of powder mixtures into hard gelatin capsules. Pure AcDiSol exhibited the greatest wicking and swelling action followed by Primojel, Polyplasdone-XL 10 and corn starch…
biodegradable polymer synthesis and propertiesMicroencapsulation and Drying ProcessesCollagen: Extraction and Characterization
Sabit Adanur、Mansour H. Mohamed1988-01-01Journal of the Textile Institute
An investigation of the effects of different weft–insertion–system parameters on yarn velocity is reported. Increasing the air–supply pressure, initial loop length, and running speed decreases the total insertion time and hence increases the average yarn velocity. To examine the effects of yarn characteristics on yarn…
Mechanical Behavior of CompositesDyeing and Modifying Textile FibersTextile materials and evaluations
Claes Ahlneck、Göran Alderborn1988-01-01PubMed
L'hygroscopie d'un excipient peut affecter la stabilite de la formulation d'une forme solide. Plusieurs marques de cellulose microcristalline et microfine, sont utilisees pour la fabrication de comprimes a base d'acide acetyl salicylique; l'etude de la degradation de ces comprimes permet d'evaluer l'influence des exci…
Advanced Cellulose Research Studies
Kinya OGAWA、Taketoshi Nojima1988-01-01Journal of the Society of Materials Science Japan
The compressive strength of two kinds of titanium alloys was investigated in the wide temperature range from 78K to 723K and the strain rate range from 10-4/sec to 103/sec. It was found that the flow stress increased with the rise of strain rate and with the decrease of temperature, while it was completely independent…
Energetic Materials and CombustionHigh-Velocity Impact and Material BehaviorElectromagnetic Launch and Propulsion Technology
Chandralata Raghukumar、Virginia M. van der Lande1988-01-01Diseases of Aquatic Organisms
A shell disease of Crassostrea cucullata Born. (rock oyster), caused by the fungus Ostracoblabe implexa Bornet et Flahault, is reported from Indian waters for the first time. The fungus causes small dark flecks on the inner surface of the valves. Decalcification of shells revealed that the fungal hyphae grew within th…
Marine Bivalve and Aquaculture StudiesCalcium Carbonate Crystallization and Inhibition