Materials Literature
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Article Structure and properties of some copper(II) coordination compounds. Distortion isomerism of Cu(II) compounds was published on January 1, 1974 in the journal Pure and Applied Chemistry (volume 38, issue 3).
The iron-electrodeposited zinc diffusion couples were annealed at temperatures from 240 to 410°C. In the diffusion zone, intermediate phases appear in the order of ζ, δ1, and Γ phases. Kirkendall markers exist always at the interface between the ζ and zinc phases. This pronounced Kirkendall effect means that there is…
In this paper, we associate an anisotropic surface energy with a nematic liquid crystal-isotropic fluid interface. Using a variational principle, equations representing the balance of traction and couple at the interface and the interfacial edge conditions are obtained. Finally, two simple experimental situations are…
Abstract
A series of very simple radioactive chemical tests has been carried out to measure reaction of dibenzyl disulfide on steel. By comparing the results with friction experiments under the same conditions, some of the requirements of extreme pressure lubrication have been determined. Current views on the mechanism of reac…
Abstract Poly (dichlorophosphazene) rubber was discovered eighty years ago. Its rapid hydrolysis in moist air has hitherto precluded applications. The polymer was intractable and could not conveniently be modified chemically until Allcock (1965) reported that a soluble form could be obtained by careful control of the…
The applicability of the pseudo-spin model is discussed in relation to the existence of constituents with a restricted number of low-lying energy states. The situation certainly occurs in materials with low-lying electronic levels which undergo co-operative Jahn-Teller phase transitions. The Slater-Takagi model of KDP…
Abstract not Available.
The progressive rabbit knee joint stiffening resulting froin immobilization was studied using biomechanical and biochemical methods. Consistent trends of increase in joint stiffness and decrease in water and total hexosamine content in the periarticular connective tissue were seen as the time of immobilization increas…
It is generally accepted nowadays that catalysis occurring at the surface of a metal compound, such as an oxide or a sulfide, can be described in terms of the properties of the. metal ions, surrounded by ligands, on the surface of the catalyst. It is one of the attractions and also the challenge of catalytic research…
Summary In Scanning Transmission Electron Microscopy (STEM) details at the top of thick specimens can be imaged with a better resolution than those at the bottom, because the scanning electron probe is broadened by multiple scattering. For quantitative measurement we used a test specimen consisting of a substrate film…
Abstract not Available.
In order to settle the precise identity of certain resonances in the paramagnetic n.m.r. spectra of low-spin haemoproteins, a variation of the MacDonald approach to porphyrins from pyrromethanes has been developed and applied to the synthesis of protoporphyrin-IX dimethyl ester (1a) and its 5,8-bis(trideuteriomethyl)-…
The wear mechanisms and processes on high-speed-steel tools used to machine steels, cast iron and a nickel-based alloy under conditions encountered in practice have been investigated. Evidence is presented of five different wear processes: (a) superficial plastic deformation by shear at high temperature; (b) plastic d…
The electrical conductivity of sintered specimens of nonstoichiometric was measured as a function of temperature from 1000°−300°C and composition from . These results are described in terms of a high temperature and low temperature region. In both temperature regions the conductivity for fixed values of x exhibits an…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectrically conducting metal dithiolate-perylene complexesLuis Alcacer and August H. MakiCite this: J. Phys. Chem. 1974, 78, 3, 215–217Publication Date (Print):January 1, 1974Publication History Published online1 May 2002Published inissue 1 January 1974https://pubs.acs.org/…
An i.r. study of nitric oxide adsorption on high area MgO (previously degassed at 800°C) at room temperature is reported. The adsorption of NO onto MgO produces i.r. bands at 800–900 cm–1, 1100–1250 cm–1, and 1350–1450 cm–1. These absorption bands were assigned to several surface species: NO–2 ions with various config…
Positron annihilation has been used in a study of the annealing of molybdenum irradiated at 60°C to the low dose of 1·5 × 1018 fast neutrons cm−2. On the basis of changes observed in positron lifetimes and intensities, it was possible to identify the defect mechanisms responsible for the various annealing stages. In p…
The critically branched state of matter (close to a gel point) is further explored theoretically and experimentally. Fluctuations and effects due to cutting the high molecular weight tail of the distribution are examined in terms of asymptotic formulae derived from the Flory-Stockmayer distribution for random ƒ-functi…
Abstract Die Photoelektronen (PE)‐Spektren der mono‐ und disubstituierten Chlor‐ und Bromäthylene zeigen bis zu 9 isolierte Banden. Die Zuordnung anhand qualitativer MO‐Modelle wird durch Spektrenvergleich, Perfluor‐Effekte und Schwingungsfeinstrukturen gesichert. Aus den zugeordneten Spektren lassen sich MO‐Parameter…