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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructure of the 10.pi. electron cyclooctatetraene dianion in potassium diglyme 1,3,5,7-tetramethylcyclooctatetraene dianion, [K((CH3OCH2CH2)2O)]2[C8H4(CH3)4]Stephen Z. Goldberg, Kenneth N. Raymond, C. A. Harmon, and David H. TempletonCite this: J. Am. Chem. Soc. 1974, 96, 5…
An experimental study was carried out to investigate the viscoelastic behavior of calcium carbonate-filled polypropylene melts, using the Han slit rheometer. In the analysis of the experimental data, the pressure gradient was used to determine the wall shear stress, and the exit pressure to determine the elasticity of…
Samples of low-density polyethylene, free from additives, were heated at temperatures between 284° and 355°C under high-purity nitrogen. Changes in molecular weight distribution (MWD), molecular weight averages, and degree of long-chain branching (LCB) were followed by gel chromatography (GPC) and viscosity measuremen…
The extinction-correction formalisms derived in a previous article have been applied to two sets of diffraction data on spherical crystals. Application to the neutron data on SrF2, collected by Cooper & Rouse at three different wavelengths, shows that the theory gives a slightly better fit than a special empirical for…
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Preface 1. Interfacial free energy and the y-ploy 2. The experimental determination of the solid-liquid interfacial free energy ySL 3. The structure of the solid-liquid interface 4. Non-structural views of the solid-liquid interface 5. Morphological stability 6. Dendritic growth 7. Eutectic growth 8. Mechanisms and ki…
Abstract Morphology of calcium carbonate crystals is controlled mainly by rate of crystallization, and Mg and Na content of the precipitating waters. Together, these factors integrate to provide important indicators of environment. Magnesium selectively poisons sideward growth of calcite; thus CaCO 3 prefers to crysta…
Two interpenetrating point lattices contain under certain conditions a common sublattice, i.e. a 'coincidence-site lattice' (CSL). The present study is restricted to cubic lattices [primitive cubic (p.c.), f.c.c. and b.c.c.]. It is shown that it is necessary for the existence of a CSL that the two lattices are related…
A method for the numerical evaluation of N-beam diffraction amplitudes and intensities which has been successfully employed over the last few years is described. This derives from the multi-slice formulation of Cowley and Moodie. The physical basis of the method and practical approaches to calculation are described.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectrical relaxation in a glass-forming molten saltF. S. Howell, R. A. Bose, P. B. Macedo, and C. T. MoynihanCite this: J. Phys. Chem. 1974, 78, 6, 639–648Publication Date (Print):March 1, 1974Publication History Published online1 May 2002Published inissue 1 March 1974https…
A theory of extinction is derived which is valid within the limit of the Darwin intensity transfer equations. An expression describing the effect of n-fold rescattering within an ideal crystallite is derived, which differs from the equation given by Zachariasen because independent coordinates x1 and x2 based on an ext…
Various lines of evidence are presented to show that for electrons in three-dimensional ordered systems there may be a regime intermediate between the extended states characteristic of weak disorder and the exponentially localized states characteristic of strong disorder. It is suggested that in the intermediate regim…
Abstract A comparison has been made between the reversible adsorption and the friction-reducing properties of long-chain fatty amines on stainless steel. This has shown that adsorption and lubricant failure depend on concentration of amine and temperature in a similar way. Breakdown of lubrication may therefore be ass…