Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCrystal data for mixed-anion molybdenum dichalcogenidesLynn F. Schneemeyer and M. J. SienkoCite this: Inorg. Chem. 1980, 19, 3, 789–791Publication Date (Print):March 1, 1980Publication History Published online1 May 2002Published inissue 1 March 1980https://pubs.acs.org/doi/1…
Magnetic properties of several batches of commercial
Heat‐transfer theory was used to analyze the variables which control the thermal stress fracture of brittle ceramic specimens subjected to rapid cooling by quenching into fluid media. Expressions were derived for the maximum quenching temperature difference to which circular solid cylindrical specimens can be subjecte…
Abstract The effect of recycling on the properties of injection molded polycarbonate was investigated. One unreinforced and two glass‐reinforced grades were studied. Fiber degradation was distinguished from molecular scission by spiral flow measurements and molecular weight analysis. During the first cycles the averag…
The partial quenching of the fluctuations of orientation of nematic layers by very large magnetic fields predicted by de Gennes and leading to increased birefringence has received a first experimental verification by Poggi and Filippini. In this paper a detailed account of this effect is given: the progressive disappe…
Acinetobacter calcoaceticus was grown in 11-liter batch fermentations with hexadecane or sodium citrate as the sole source of carbon. Surface and interfacial tension measurements of the microbial broth indicated that surface-active compounds were being produced only during growth on the hydrocarbon substrate. Contact…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMacroions and Macroion Pairs in the Anionic Polymerization of β-Propiolactone (β-PL)Stanislaw Slomkowski and Stanislaw PenczekCite this: Macromolecules 1980, 13, 2, 229–233Publication Date (Print):March 1, 1980Publication History Published online1 May 2002Published inissue 1…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSub-part-per-billion determination of total dissolved selenium and selenite in environmental waters by x-ray fluorescence spectrometryHarry J. Robberecht and Rene E. Van GriekenCite this: Anal. Chem. 1980, 52, 3, 449–453Publication Date (Print):March 1, 1980Publication Histo…
A simple expression is presented which can be used to estimate the mean free paths of electrons in solid organic insulators as a function of the electon energy. Input parameters are the molecular weight and the density of the organic sample. The range of validity is 100 eV to 10 keV. It is demonstrated that, for this…
The low-temperature exciton luminescence of silicon has been measured and analyzed on the basis of rate equations describing the formation and decay kinetics of free exciton, bound exciton and bound multiexciton complexes. In particular, the excitation-level and impurity-concentration dependences of the luminescence-i…
Abstract The finite deformation elasticity of gels of stiff rodlike polymer chains is discussed theoretically. Unlike a rubber composed of flexible polymer chains, the elasticity of this system is energetic, and arises from the elastic deformation of the stiff chains which are forced to bend under macroscopic strain.…
Abstract The decomposition reaction of hydrogen peroxide was carried out by using Fe(III)‐3,4,3′,4′,3″,4″,3″′,4″′‐octacarboxyphthalocyanine (Fe(III)‐oaPc) as a catalyst, which has previously been reported by Boston et al. Fe(III)‐oaPc is a remarkably effective catalyst for the reaction, compared with hemin, other meta…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSinglet Electronic Energy Transfer in Polymers Containing Naphthalene and Anthracene ChromophoresD. A. Holden and J. E. GuilletCite this: Macromolecules 1980, 13, 2, 289–295Publication Date (Print):March 1, 1980Publication History Published online1 May 2002Published inissue…
It has recently become possible to observe experimentally the spectral, spatial and temporal evolution of non-equilibrium phonon distributions in solids. The author reviews those techniques which are applicable to high-frequency (>or approximately=200 GHz) phonon propagation. Each technique is analysed for the physica…
The pH difference absorption spectra of human lysozyme [EC 3.2.1.17] were measured. The difference spectra in the acidic region had a peak at 300 nm, as observed for hen and turkey lysozymes. The pH dependence curve of the extinction difference at 300 nm was well interpreted in terms of the pK values of the catalytic…
A Monte Carlo simulation of the Knudsen diffusion of gases in a porous solid is described and results of such simulations presented. The solid was represented in the computer as an assemblage of spheres. Equations are presented which enable the prediction of a Knudsen diffusivity from the mean pore size (or, preferabl…
Glass-ceramics which have played an ever increasing role in science and technology in the last two decades are the most widely used representative of a new type of partly crystalline or semi-amorphous materials. They can be prepared by induced crystallization of glass-forming melts. This article, which is in two parts…
An analysis is presented of the contributions to the potential energy of interaction between water molecules near the hydrogen bonded equilibrium configuration. From this analysis we synthesize an effective potential that includes the influences of long-ranged and nonadditive interactions. The influence of the hydroge…
Electrochemical responses from the reduction of Ru III (edta) coordinated to films of high molecular weight poly(4‐vinylpyridine) on pyrolytic graphite electrodes were studied as functions of film thickness, temperature, supporting electrolyte composition, and solvent. Responses at filmed electrodes from metal complex…
The dependence of the oxidation rate of lead films on the pressure of oxygen was investigated by ellipsometric and resistance techniques for oxygen pressures between 200 Pa and 100 kPa and in the temperature range 323-423 K. Measurements of the pressure dependence were obtained by studying the change in oxidation rate…