Materials Literature
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Thiogallate compounds represented by the formula MGa 2 S 4 [ where M = Ca + 2 , Sr + 2 , Ba + 2 , Pb + 2 , Eu + 2 , ( Na + 1 La + 3 ) and ( Na + 1 Ce + 3 ) ] were prepared by solid‐state reaction. Single crystals of the alkaline earth derivatives were also obtained by vapor transport of the corresponding polycrystalli…
The heat capacity of o-terphenyl has been measured with an adiabatic calorimeter for the crystal from 2°K to Tm (329.35°K), for the glasses from 2°K to Tg (around 240°K) and for the liquid from Tg to 360°K, on a sample with less than 0.005 mole % impurity. The heat of fusion and the entropy of fusion are 17 191 J mole…
A simple theory of the swelling of materials subjected to high energy particle irradiation is developed. Chemical reaction rate equations are used as a basis. Point defects, interstitials and vacancies, are assumed to be produced randomly throughout the solid. They move by random walk through the material until they c…
Abstract not Available.
A comprehensive study of the magnetic properties of nonstoichiometric (cation-deficient) titanomagnetites is described. Measurement of the saturation magnetization of synthetic samples provides information about the mechanism by which increasingly nonstoichiometric states evolve. It is concluded that in the spinel str…
The Maier-Saupe theory of the nematic mesophase is extended to rod-like molecules interacting with a perfectly general anisotropic potential. The resulting series expansion for the pseudo-potential accounts quantitatively for the observed temperature dependence of the orientational order, even when the expansion is re…
Current physicochemical knowledge on the structure of collagen is based almost exclusively on dilute solution measurements or on results from x-ray diffraction studies and electron microscopy of native and reconstituted collagen fibers and fibrils. A comprehensive treatise of this subject has recently appeared [1]; th…
During pitting of iron and stainless steels the potential drop across the interface of the dissolving surface within the pit is in the region of active metal dissolution, even when the potential of the specimen surface is controlled at potentials as high at +1.4 (SHE), as well as during natural corrosion. This conclus…
Abstract not Available.
Abstract Die wichtigste und nahezu einzigartige Eigenschaft der makrocyclischen Polyäther („Kronenverbindungen”︁) ist ihre Tendenz zur Komplexbildung mit Alkalimetallsalzen und Salzen mit ähnlichen Kationen. Derartige Komplexe werden durch nichtgerichtete Coulomb‐Kräfte zwischen dem Kation und den negativen Enden der…
Polymer compatibility, as reviewed in this paper, will refer to the miscibility of homopolymers with each other and with random copolymers in the amorphous, noncrystalline state, with no distinction made between rubbers and glasses. This paper will not deal with mixed crystal formation in mixtures of crystalline polym…
A simple technique for agarose gel electrophoresis allowing the simultaneous separation of 15 samples in less than one hour is described. The method is very suitable for clinical routine analyses of proteins in plasma and other body fluids since a good resolution is obtained with patterns which are easy to interpret.…
Book digitized by Google from the library of Oxford University and uploaded to the Internet Archive by user tpb.
Hot workability relates to the ability of a metal or alloy to be deformed under conditions of high temperature (> O.6Tm, where Tm is the melting temperature in degrees Kelvin) and relatively high strain rates (10 -1 to 10 3 S -1 ). The two characteristics that govern hot workability are strength and ductility. In a…
The molecular weight and molecular weight distribution of a polymer can markedly affect its mechanical properties. While this has been recognized for a long time, quantitative studies have been relatively difficult to perform for a number of reasons. A major problem has been the characterization of the complete molecu…
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMechanism of epoxidation of olefins by covalent peroxides of molybdenum(VI)K. B. Sharpless, J. M. Townsend, and D. R. WilliamsCite this: J. Am. Chem. Soc. 1972, 94, 1, 295–296Publication Date (Print):January 1, 1972Publication History Published online1 May 2002Published inis…
Experiments in which a small gas bubble was slowly advanced towards a polished silica plate under dilute aqueous solutions have shown that “thick” equilibrium films are formed not only on clean, hydrophilic, silica, but also on methylated, hydrophobic, silica. The latter films are metastable, collapsing when disturbed…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDynamics of pH in Controlled Stirred Tank ReactorT. J. McAvoy, E. Hsu, and S. LowenthalCite this: Ind. Eng. Chem. Process Des. Dev. 1972, 11, 1, 68–70Publication Date (Print):January 1, 1972Publication History Published online1 May 2002Published inissue 1 January 1972https:/…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectrical conductivity by the bis(1,3-dithiole)-bis(1,3-dithiolium) systemFred Wudl, Darold Wobschall, and Earl J. HufnagelCite this: J. Am. Chem. Soc. 1972, 94, 2, 670–672Publication Date (Print):January 1, 1972Publication History Published online1 May 2002Published inissu…