Materials Literature
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Fifteen papers written by technical leaders in the field and presented as a comprehensive symposium held at Case Western Reserve University. Authors thoroughly handle the subject matter by analyzing current problems and presenting their theories and the results of research projects. The information is practical and ti…
<div class="htmlview paragraph">Platinum (Pt), palladium (Pd) and rhodium (Rh) catalysts were evaluated on an engine dynamometer to examine the effects of air-fuel ratio (A/F), A/F amplitude and its frequency on the conversion efficiencies of NO<sub>x</sub>, THC and CO.</div> <div class="htm…
Abstract not Available.
<div class="htmlview paragraph">This paper describes application of sintered silicon nitride to the swirl lower-chamber in order to improve performance of turbocharged diesel engines. Various stress analyses by finite element method and stress measurements have been applied to determine the design specifications…
TItrachlorodibenzo-p-dioxin (TCDD) and related halogenated aromatic hydrocarbons are a highly toxic class of environmental contaminants, as evidenced by numerous cases of accidental poisonings of human and animal populations and their extreme toxic potency in laboratory animals.The proposed model for the mechanism of…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEPR studies of hydrogen bonding in ferric porphyrin complexes. Low-spin dimethoxo(tetraphenylporphinato)ferrate(III) in dimethyl sulfoxide-methanolTomoko Otsuka, Toshie Ohya, and Mitsuo SatoCite this: Inorg. Chem. 1985, 24, 5, 776–782Publication Date (Print):February 1, 1985…
Etudes aux RX et a l'aide de la microscopie electronique de monocristaux de K x WO 3 . Les sur-reseaux commensurables dans le plan a-b sont, pour la plupart des composes assez simples: maille orthohexagonale ou hexagonale avec 2 ou 4 fois le volume de la structure du bronze de tungstene. Les rangees des sur-reseaux in…
Abstract Photoisomerization of 3-(aryicarbamoyl)norbornadiene-2-carboxylic acid 1 to the corresponding quadricyclane derivative 2 in an aqueous alkaline solution was clean and dependent upon the p-substituent of the aryl group. The exothermically reversal reaction of 2 to 1 was also clean but independent upon the subs…
The equilibrium vaporization reactions and have been studied by mass‐loss effusion in the temperature range 1237–1401 K. The results were combined with published calorimetric data for nickel‐rich samples and static phosphorus‐dissociation pressure data for phosphorus‐rich samples, with consideration of the requirement…
Article The Influence of Experimental Conditions upon the Measurements of Hydrogen Diffusion in Palladium by Electrochemical Permeation Methods* was published on February 1, 1985 in the journal Zeitschrift für Physikalische Chemie (volume 146, issue 2).
Abstract An XPS study of the oxides formed on GaAs at ambient temperature and in ambient atmosphere is reported. Special attention has been paid to the interpretation of the Ga 3d and As 3d energy levels. By varying the angle between energy analysed electrons and the surface of the sample the depth distribution of the…
Abstract A recent method, which contains no adjustable parameters, is used to deconvolute the background intensity of inelastically scattered electrons from the XPS spectrum of silver in the 200–900 eV kinetic energy range. The inelastic background signal is found to match the measured spectrum in the energy regions b…
The eigensolutions of the Maxwell equations for light propagation in a perfect cholesteric liquid crystal are considered. They are Bloch waves having, in principle, infinitely many Fourier components. The relative amplitudes of these components are studied as a function of the angular frequency \ensuremath{\omega} and…
The structure of individual liposomes of both biological and synthetic amphiphiles is shown to be a single family of Dupin cyclides. Such a family consists of closed, parallel surfaces with a conjugate ellipse and hyperbola as the loci of the centres of curvature. The structure is established by comparing freeze-fract…
Abstract The polymerization of p ‐cresyl glycidyl ether catalyzed by imidazoles has been investigated as a model reaction for the polymerization of technical epoxy resins. The dependence of oligomer yield on time, temperature, and imidazole concentration, the distribution of the polymerization degrees, and the influen…
The tracer diffusion coefficients of 22 Na and 86 Rb and electrical conductivity were measured in a series of 0.56(Na, Rb) 2 S.0.44SiS 2 glasses as a function of the Rb/Na ratio and temperature. The data were used to calculate the Haven ratio as a function of the Rb/Na ratio. The Haven ratio at 149.6°C increases from…
Order–disorder transitions occurring in the Ag 2 SO 4 –K 2 SO 4 system were investigated by reaction kinetics, thermal analyses, X-ray diffraction, and electrical conductivity techniques. Solid–liquid and solid–solid phase diagrams are reported.The conductivity data in the high temperature phase of the solid resemble…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPicosecond photodissociation of six-coordinate iron(II) porphyrinsDabney White Dixon, Christine Kirmaier, and Dewey HoltenCite this: J. Am. Chem. Soc. 1985, 107, 4, 808–813Publication Date (Print):February 1, 1985Publication History Published online1 May 2002Published inissu…
Nitrooctaethylporphyrins readily undergo nucleophilic aromatic substitution in the presence of HCl or HBr. In the presence of methoxide, nucleophilic addition to give a porphodimethane occurs, followed by autoxidation to the methoxyporphyrin. Unlike the nitrated complexes, the chlorosubstituted porphyrins exhibit redo…
Experiments in which a long vertical, heated wire is surrounded by concentric annuli of a melt and its crystalline solid show that the convection state changes from a stable unicell surrounded by a stationary cylindrical solid–liquid interface, to a complex time-dependent flow surrounded by a rotating, helical solid–l…