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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·…
The microstructural defects produced in molybdenum by neutron irradiation in the temperature range 50 °C to 800 °C have been characterized by transmission electron microscopy. At a low irradiation temperature, 50 °C, a large number of small dislocation loops, presumably interstitial, form within a complex dislocation…
Abstract The production of dry matter and the uptake and concentration of nutrients by barley ( Hordeum vulgare L.) from soil adjusted to different levels of salinity with a mixture of salts were evaluated in a greenhouse study. Following germination of the plants, soil salinity levels ranging from EC values of 0 to 3…
Abstract not Available.
General expressions are derived for the magnitude and dispersion of elasto-optic coefficients in terms of strain-induced modifications of both the electronic energy-band structure, and, if present, the excitonic structure. This analysis uses the deformation potential concept in conjunction with oscillator models for t…
An inelastic neutron scattering investigation of high-temperature $\ensuremath{\beta}$ quartz by triple-axis spectrometry reveals the existence of a phonon branch with anomalously low and temperature-dependent frequencies. Near the Brillouin zone center, the mode is overdamped and unstable, and gives rise to a critica…
The mechanism of the hydrated nickel hydroxide electrode, used in the nickel cadmium battery, is a matter of considerable controversy. Potential sweep experiments were performed on film nickel hydroxide electrodes in an effort to determine the oxidation‐reduction mechanism. The existence of more than one reduced struc…
The diffusion coefficient for protons moving in the hydrated nickel hydroxide lattice has been determined using a potential step technique. It was found to have the value about during charging and during discharging for the nickel hydroxide structure usually found in the nickel electrode of the nickel‐cadmium battery.…
As far as the electrical conductivity is concerned, solids are usually classified as metals, semiconductors, or insulators. In metals the concentration of the charge carriers responsible for the electrical conductivity is large, whereas in semiconductors and insulators the carrier concentration is much smaller. The di…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDipole polarizabilities of ions in alkali halide crystalsJohn Norton Wilson and Richard M. CurtisCite this: J. Phys. Chem. 1970, 74, 1, 187–196Publication Date (Print):January 1, 1970Publication History Published online1 May 2002Published inissue 1 January 1970https://pubs.a…