Materials Literature
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Abstract Komplexe des Ni II , Rh I , Pd II , Pt II , Au III und Cu II mit 1, 3, 4‐Thiadiazol‐2, 5‐dithiol wurden dargestellt. Auf Grund analytischer, magnetischer und spektraler Daten werden Strukturen vorgeschlagen. Kristallfeld‐Parameter wurden in Übereinstimmung mit den vorgeschlagenen Strukturen berechnet.
A normal vibration analysis has been carried out for crystalline syndiotactic poly(vinyl chloride) and its deuterated derivatives. This was based on a general valence force field derived from an analysis of the spectra of small secondary chloride molecules. The calculations permit a very satisfactory assignment to be…
The sulfonation of meso-tetraphenylporphyrin, in concentrated sulfuric acid followed by neutralization and dialysis, provides an efficient and convenient route to meso-tetra(4-sulfonatophenyl)porphyrin.
The increasing demand for finely powdered boron carbide together with the rapidly rising cost of this material has stimulated research into alternative methods for its production. When boron trichloride is reacted with methane‐hydrogen mixtures in a radio frequency argon plasma, boron carbides of variable B/C ratios a…
Abstract Clay (<2 μ m) and fine silt (2–20 μ m) fractions of twenty seven soil samples from eight tropical ferruginous profiles of the Mysore Plateau (India) were analysed for kaolinite by dehydroxylation and selective dissolution. The considerable amounts of iron extracted by the procedure and the closeness of the Si…
The general incompatibility of polymers may be overcome by suitable compatibilizing agents, i.e. block or graft copolymers having segments of similar structure or solubility parameter as the polymers being mixed. Presence of a compatibilizing agent influences the properties of polymer blends and alloys as well as poly…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and reactions of new complexes of nickel, palladium, and platinum with 1,2-ethanedithiol, 2-(methylthio)ethanethiol, and 2-(methylthio)ethane disulfideThomas B. Rauchfuss and D. Max RoundhillCite this: J. Am. Chem. Soc. 1975, 97, 12, 3386–3392Publication Date (Prin…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInfluence of metal particle size on the chemisorption properties of supported platinum. Analogy with cluster compoundsM. Primet, J. M. Basset, E. Garbowski, and M. V. MathieuCite this: J. Am. Chem. Soc. 1975, 97, 13, 3655–3659Publication Date (Print):June 1, 1975Publication…
The magnetizations of Ni-Rh alloys on either side of the critical composition for ferromagnetism (${c}_{\mathrm{crit}}\ensuremath{\approx}63\ensuremath{-}\mathrm{a}\mathrm{t}.%\phantom{\rule{0ex}{0ex}}\mathrm{N}\mathrm{i}$) were measured between 4.2 and 250\ifmmode^\circ\else\textdegree\fi{}K in fields up to 56 kOe. T…
Abstract The idealized symmetry of kaolinite-type minerals (1:1 phyllosilicates) is analysed in detail. They can be considered as OD-structures consisting of three kinds of OD-layers. Each of them, taken separately, possesses higher symmetry than their combination. This explains the well-known tendency of kaolinite-ty…
Abstract Formation of free radicals in photoirradiated cellulose has been studied by means of ESR spectroscopy at 77°K. Three kinds of light sources with different wavelengths between 2500 and 4000 ÅR were employed. No radicals detectable by ESR were recorded when cellulose was irradiated with light of wavelength long…
Abstract Twelve force constants in the general quartic force field of carbon disulfide have been determined by a least-squares method from the available spectroscopic data on four isotopic species of carbon disulfide: 12C32S2, 13C32S2, 12C32S34S, and 13C32S34S. A reasonable set of force constants is obtained together…
Using techniques drawn from the statistical theory of branching processes, we approximate the critical resolved shear stress for the athermal planar glide of a dislocation, idealized as a flexible line of constant tension, through a random mixture of immobile point obstacles of distinct types. The approach simultaneou…
Some of the areas where interfacial protein layers dominate the boundary chemistry are reviewed, and we introduce some nondestructive analytical methods which can be used simultaneously and/or sequentially to detect and characterize the microscopic amounts of matter at protein or other substrates which spontaneously a…
Aqueous solutions of bovine A1 protein, the major component of the basic protein fraction of myelin, were studied by small angle X-ray diffraction. The experimentally determined molecular weight, 17,800, is within 3% of that corresponding to the amino acid sequence, 18, 395, and the radius of gyration was found to be…
Abstract Rotes KSbS 2 wurde aus wässerigen Lösungen von KHS und Sb 2 S 3 unter milden hydrothermalen Bedingungen dargestellt und strukturell untersucht. Die kristallographischen Daten sind: monoklin, Raumgruppe C2/cC a = 8,75 ± 0,01 Å, b = 8,98 ± 0,01 Å, c = 6,84 ± 0,01 Å β = 121,6° ± 0,1 4 Formeleinheiten in der Ele…
Abstract A mechanism is proposed for the thermal degradation of aromatic amine‐cured glycidyl ether‐type epoxide resins which is based on the results of previous work in this field. The significance of the degradation mechanism to the thermal stability of aliphatic amine‐cured epoxides and aromatic amine‐cured cycloal…
Abstract Damping systems based on interpenetrating polymer networks (IPN's) provide noise and vibration attenuation over broad temperature and frequency ranges. Semicompatible latex IPN's are employed in both extensional and constrained layer configurations. The damping behavior of IPN's of compositions poly(ethyl met…
A study has been made of the exudate provoked by intrapleural carrageenan in rats. Various parameters have been measured including volume of exudate, numbers and types of cells. Pharmacological assay has shown the early release of histamine and 5HT into the exudate followed at later times by a release of prostaglandin…
Relative quantum yields have been measured for O(1S), N(2D), and N2(A 3Σ+u) production from N2O over the wavelength range 1100–1500 Å. The measurements of O(1S) were made by observing the 1S0 → 1D2 emission at 5577 Å. N(2D) was measured via the intensity of NO β bands generated by N(2D)+N2O → N2+NO(B 2Πr) followed by…