Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleStructure of porphyrins and metalloporphyrinsEverly B. FleischerCite this: Acc. Chem. Res. 1970, 3, 3, 105–112Publication Date (Print):March 1, 1970Publication History Published online1 May 2002Published inissue 1 March 1970https://pubs.acs.org/doi/10.1021/ar50027a004https://doi…
Many crystals produce a diffuse scattering of X-rays which is localized in a series of relplanes. It is shown that the corresponding linear disorder in the crystal may have various origins. In silicon, the scattering is due to thermal vibrations and is well explained by the elastic properties of the crystal. In neutro…
An electron monochromator for use in an axial magnetic field is described. Electrons are injected parallel to the magnetic field and an electric field is applied in a perpendicular direction. The electrons thus describe trochoids and drift in a direction perpendicular to both the electric and magnetic fields and dispe…
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Boron 1~ and chromium 3E binding energies have been measured for 25 boron compounds and 17 chromium compounds.The data correlate linearly with calculated atomic charges.A linear correlation is also demonstrated for CNDO~calculated atomic charges and carbon 1~ binding energies determined by other workers.
The practice of regarding the thermal properties of concrete as constants may lead to serious errors in heat flow calculations. Because of the physicochemical instability of concrete it is very difficult to procure valid experimental information. In this paper theoretical considerations are presented which, together w…
Abstract Lime rates equivalent to the amount of exchangeable Al reacted primarily with the exchangeable Al and reduced the Al saturation of the effective CEC to less than 30%. Lime rates greater than the equivalent amount of exchangeable Al resulted in appreciable amounts of nonexcharigeable acidity being neutralized.…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRing Closure and Local Conformational Deformations of Chain MoleculesNobuhiro Go¯ and Harold A. ScheragaCite this: Macromolecules 1970, 3, 2, 178–187Publication Date (Print):March 1, 1970Publication History Published online1 May 2002Published inissue 1 March 1970https://pubs…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRheological Properties of Anionic Polystyrenes. I. Dynamic Viscoelasticity of Narrow-Distribution PolystyrenesShigehara Onogi, Toshiro Masuda, and Keishi KitagawaCite this: Macromolecules 1970, 3, 2, 109–116Publication Date (Print):March 1, 1970Publication History Published…
The review deals with the advances in the theory of the formation of allyl polymers and their practical applications. Until recently there was only limited interest in allyl polymers because with the usual free-radical initiation allyl compounds polymerise with difficulty and yield polymers with a low molecular weight…
A simple model is used to describe the magnetic properties of cobalt impurities in copper. Isolated impurities are nonmagnetic with a high spin-fluctuation temperature. Isolated pairs of neighbor cobalt atoms are very nearly magnetic: This gives rise to a large susceptibility and a large electronic specific heat, vary…
Convergent light observations have been made on three liquid crystalline substances with nematic and smectic phases. The nematic phase was observed to be uniaxial as expected, but smectic $C$ was found to be biaxial. The optic axial angle $2V$ for smectic $C$ was found to be on the order of 20\ifmmode^\circ\else\textd…