Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Research Article| February 01, 1970 Experimental Devitrification Rate of Rhyolite Glass GARY LOFGREN GARY LOFGREN Geology Branch TH2, NASA Manned Spacecraft Center, Houston, Texas 77058 Search for other works by this author on: GSW Google Scholar Author and Article Information GARY LOFGREN Geology Branch TH2, NASA Man…
The magnitude of the extinction coefficient and the shift on substitution show that the band at 16,200 cm–1 in the absorption spectrum of Fe(C5H5)2+, which formerly was attributed to a 3d–3d ligand-field transition, is due to a ligand-to-metal e1u→e2g charge-transfer transition.
Various barium orthoferrates over wide Fe 4+ concentrations were prepared and their magnetic properties were investigated. The hexagonal phase with large Fe 4+ concentration is ferromagnetic above the anomaly point. With increasing Fe 3+ , it tends to be antiferromagnetic. The cubictetragonal phases are paramagnetic w…
In our work we studied composites of poly(lactic) acid (PLA) and low density polyethylene filled with cellulose fibres. The studied composite materials were manufactured with a twin-screw extruder. The extruded compound was processed in to samples using compression moulding. The content of cellulose in polymer/cellulo…
Abstract The electronic band structures of PbS, PbSe, and PbTe have been calculated using the relativistic Green's function method. The choice of a relativistic atomic potential for Pb and of nonrelativistic atomic potentials for S, Se, and Te inthe muffin‐tin spheres results in similar band models for the lead salts.…
Attention is directed to the uncertain state-of-affairs surrounding the influence of plastic deformation on concommitant tracer-diffusivity in metals. We now offer some clarification of this elusive solid-state transport problem.It is concluded that strain-enhanced diffusion is a real phenomenon, and in fact, it can b…
For Environmental concern on synthetic fibers (such as glass, carbon, ceramic fibers, etc.) natural fibers such as flax, hemp, jute, kenaf, etc. are widely used. In this research work, jute fiber reinforced polypropylene matrix composites have been developed by hot compression molding technique with varying process pa…
Abstract We hope that the preceding presentation has made it clear that the glass transition is not a simple phenomenon, but a very complicated process which is still not understood in all of its ramifications. The nature of the glass transition temperature ( T g ), to begin with, has been the source cf considerable c…
Fundamental equations of the theory of elasticity of an anisotropic body the refined theories of anisotropic plates determination of the stress state and the strains of plates some problems of vibrations and stability of plates some estimates of the refined theories.
Evaluation of fabrication procedures and operating life have indicated that moisture can play a major role in determining the performance of nematic liquid crystal displays based on the dynamic scattering mode (DSM) in anisylidene-p-aminophenyl-acetate. There is strong evidence that the presence of moisture promotes e…
Resistivity change as a function of electron irradiation near 8 °K and of annealing after irradiation has been measured on zirconium. Damage rates were measured as a function of incident electron energy from 0.70 to 1.9 MeV. A value of 24 eV for the displacement threshold energy was determined by extrapolation of the…
The electrochemical oxidation of guanine at the pyrolytic graphite electrode was investigated by linear and cyclic scan voltammetry between p H 0–12.5 and by controlled electrode potential electrolysis in aqueous 1M acetic acid solution. Guanine is oxidized by an initial potential determining attack at the double bond…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation D. L. Raimondi, E. Kay; High Resistivity Transparent ZnO Thin Films. Journal of Vacuum Science an…
Preferential anodic dissolution of Zn from brass is examined from the point of view of the volume diffusion mechanism. Results from x‐ray investigations of partially dissolved γ‐brass (Cu 65 a/o (atomic per cent) Zn) and η‐brass [Cu 86 a/o Zn] specimens show the appearance of new, more Cu‐rich, intermediate and termin…
Chitin was prepared from prawn shell waste by a chemical process involving demineralization, deproteinization and decolorization. Chitosan was prepared from chitin by deacetylation. The present study was undertaken to evaluate the influence of deacetylation process during chitosan production on the physiochemical and…
The kinetics of the hydrogen evolution reaction on titanium in sulfuric acid solutions between pH 0.25 to 2.25 have been investigated. The Tafel slope of the HER was 150 mV at all pH values, and the electrochemical reaction order was 0.6 with respect to the hydrogen ions. The corrosion potential varied negligibly with…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXT1:13 Heteropolyvanadates of manganese(IV) and nickel(IV)Charles M. Flynn Jr. and Michael T. PopeCite this: J. Am. Chem. Soc. 1970, 92, 1, 85–90Publication Date (Print):January 1, 1970Publication History Published online1 May 2002Published inissue 1 January 1970https://pubs.a…
The adsorption of carbon dioxide on magnesia (prepared by hydrolysis of magnesium methoxide) has been studied by measurements of the i.r. spectra of carbon dioxide which had been adsorbed at various temperatures, supplemented by gravimetric measurements of adsorption isotherms at temperatures ranging from –97·9 to 500…
This review is divided into seven sections entitled "Introduction", "Basic theoretical framework", "Readily available materials", "Applications", "Performance and limitations of narrow band interference filters", "Problems in the preparation of optical coatings" and "Probable future developments". In the introductory…
Abstract A study of the ratio of the glass temperature to the melting point of 132 polymers is described. Contrary to some other workers' observations on smaller numbers of polymers there is no sharp division between the ratios observed for symmetrical and unsymmetrical polymers. The arithmetic mean of the ratio is 0·…