Materials Literature
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The effect of metal admixtures on the structure and imperfections of chalcogenide glassy semiconductors is investigated for Ga admixture in GeSe 4 glass. Information is obtained by the positron annihilation technique. A microcrystalline phase in glass under doping at low admixture concentrations (about 0.01 at %) is i…
Abstract The title clathrate Cd(NH(CH3)2)2Ni(CN)4·\frac12C6H6 has a layered host structure of metal complex network [CdNi(CN)4]∞ linked by the CN ligands and the benzene molecule is enclathrated in a cage-like cavity formed between the layers. The channel-like cavity, observed along with the cage-like one for the Hofm…
Chaetoceros muelleri Lemm. was isolated from lower Chevelon Creek, Arizona and cultured in a defined medium. Maximum division rates occurred at temperatures between 20 and 30°C with mean doublings per day sharply decreasing above and below this temperature range. No divisions occurred at <5°C or >40°C. Chaetoceros mue…
Measurements are presented of the variation of the acoustic cavitation threshold of water with concentration of the polymer additives polyethylene oxide and guar gum. It was found that small amounts of these additives could significantly increase the cavitation threshold. A theoretical model, based upon nucleation of…
A new water-tree-retardant XLPE has been developed for power cables after intensive studies of various materials. The new XLPE is filled with an organic polymer that acts as a barrier against water-tree propagation. Cables having this new insulation material generate far fewer and smaller water trees and have a voltag…
The force-extension behavior of a helically wrapped rubber-like core up to the point of wrap failure has been theoretically analyzed. In addition to the forces required to extend the wrap and core, there is a significant Poisson effect because the wrap applies a radial pressure to the core, particularly at higher heli…
The bending rigidity of wool worsted yams was estimated from the mean fiber diameter together with four correction factors due to fiber diameter distribution, yam twist, fiber ellipticity, and mean fiber length. The first two correction factors were the most important. The bending hysteresis (the coercive couple) incr…
Moharam and Gaylord [ J. Opt. Soc. Am.71, 811 ( 1981)] have recently found a neat new way of numerically analyzing the coupled-wave equations describing light propagation in thick, uniformly modulated dielectric gratings with parallel planar boundaries. This interesting new contribution has raised some important quest…
Replacement of the expansion coefficient and of the bulk modulus and Bridgman constant of the occupied volume by the corresponding parameters of the glass leads to acceptable predictions for the shift factor, a p, for superposition of stress relaxation measurements as a function of pressure at constant temperature onl…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTExcited-state electron-transfer reactions of zinc octaethylporphyrinNatalia Barboy and Jehuda FeitelsonCite this: J. Phys. Chem. 1984, 88, 6, 1065–1068Publication Date (Print):March 1, 1984Publication History Published online1 May 2002Published inissue 1 March 1984https://pu…
A thin, heated glass rod fixed at one end is quickly rotated around its axis in a small vertically positioned tube furnace. A computer is used to determine the temperature‐viscosity correlation by solving an integral equation from the measurement of the torsion moment, the speed of rotation, the diameter of the rod, a…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInteraction potentials and the properties of xenon overlayers physisorbed on the graphite basal planeMichael L. Klein, Seamus O'Shea, and Yoshiaki OzakiCite this: J. Phys. Chem. 1984, 88, 7, 1420–1425Publication Date (Print):March 1, 1984Publication History Published online1…
The transport of heavy particles produced by the 10B(n,α)Li and 235U(n,νn)ff nuclear reactions in a two-region cylindrical geometry is analyzed. Total spatially dependent energy current, power density, and transport efficiency are calculated. These results are significantly different from what would be predicted using…
Abstract Perfluorobutenyloxyphthalic anhydride (PFPA) has been synthesized as a new curing agent for epoxy resins, and the properties of epoxy resin cured with PFPA have been investigated. Good PFPA synthesis yields were realized by a dehydrating ring closure of perfluorobutenyloxyphthalic acid, which was obtained thr…
A 2% aqueous solution of methylene blue was administered as a single intravenous (i.v.) bolus injection (10 mg/kg) to six lactating cows and seven lactating goats and a continuous i.v. drip to five lactating goats. The same dose was administered as a 10% solution by intramammary infusion to five lactating goats. Blood…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTReaction of (octaethylporphyrinato)cobalt complexes with diazoacetaldehyde. N-(Formylmethyl)- and N-(2-hydroxyethyl)porphyrinsJunichiro Setsune and David DolphinCite this: Organometallics 1984, 3, 3, 440–443Publication Date (Print):March 1, 1984Publication History Published…
In the course of a systematic study of the structural and conformational phase-transition sequences present in crystals with the general formula ${({\mathrm{C}}_{n}{\mathrm{H}}_{2n+1}{\mathrm{NH}}_{3})}_{2}\mathrm{Zn}{\mathrm{Cl}}_{4}$, a pure proper gyrotropic phase transition has been discovered at 249 K in the bis-…
Matrix elements may be viewed as the scalar projection of an operator onto the transition density between the states involved (trace of matrix product equivalent to double dot product). This means that the operator and transition density matrices must “look the same” if a matrix element is to be the large. Using CNDO/…
Abstract The kinetics of the formation of polyacrolein microspheres by ionizing radiation (polymer I) were investigated. Their structure and reactivity were compared with polyacrolein microspheres prepared by base catalysis (polymer II). The study of Fourier infrared (IR) spectra of polymers I and II showed structural…
Abstract Monitoring the wetting force exerted on a single fiber while the fiber is slowly and continuously immersed in a liquid and then withdrawn can provide several kinds of information about the physicochemical heterogeneity of the fiber surface. This method for scanning the fiber surface with an appropriate liquid…