878. The negative ions of some porphin and phthalocyanine derivatives, and their electronic spectra
J. W. Dodd and N. S. Hush, J. Chem. Soc., 1964, 4607 DOI: 10.1039/JR9640004607
Materials Literature
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Elastic Constants of a (73.8% Ni-26.2% Fe) Ferromagnetic Alloy
The elastic constants of a (73.8% Ni-26.2% Fe) ferromagnetic alloy have been measured at 300°K with the following results: C11=23.04, C12=14.44, and C44=11.92 (in units of 1011 dyn cm−2). These results are compared with previously reported work on pure Ni and a (30% Ni-70% Fe) alloy.
Plasma Anodized Aluminum Oxide Films
A low‐pressure gas plasma of oxygen ions has been used as the electrolyte for anodizing evaporated aluminum films on glass substrates. The oxide film grows at 22Aå/v at low voltages, while above 50v, the growth rate is somewhat less. Films have been anodized up to 90v. Capacitors formed of such plasma anodized aluminu…
Electrical structures of interfaces in steady electrolysis
L. Bass, Trans. Faraday Soc., 1964, 60, 1656 DOI: 10.1039/TF9646001656
Die Cardenolide der Samen von Antiaris toxicaria Lesch. 1. Mitteilung: Isolierungen und Identifizierungen Glykoside und Aglykone, 258. Mitteilung
Abstract In den Samen von Antiaris toxicaria L ESCH . liessen sich nach fermentativem Abbau mit den sameneigenen Fermenten 34 Cardenolide nachweisen. 16 konnten nach chromatographischen Trennungeii in Kristallen isoliert werden. Von diesen liessen sich 10 mit bekannten Cardenoliden identifizieren, 6 waren neu. Ihre St…
Analysis of the Hydrogen Reduction of Silicon Tetrachloride Process on the Basis of a Quasi-Equilibrium Model
The process for the growth of silicon single crystals by the hydrogen reduction of silicon tetrachloride has been described using a model which assumes that chemical equilibrium obtains at the silicon deposition site. The thermodynamic calculations by Lever for the equilibrium gas phase composition in the Si‐Cl‐H syst…
The Role of Hydrolysis in the Reaction of Heavy Metals with Soil‐Forming Materials
Abstract The proposition that hydrolysis may account for the selective adsorption of heavy metals by clay surfaces is compared with an alternate explanation of specific exchange of the metal with weakly dissociable H + . It is shown that past evidence offered in support of the two hypotheses is somewhat ambiguous. The…
Kristallisation von Polycarbonaten. I. Lichtmikroskopische Untersuchungen
Abstract Polycarbonate auf der Basis 4,4′‐Dioxy‐diphenyl‐2,2‐propan, 4,4′‐Dioxy‐diphenylmethan und 4,4′‐Dioxy‐diphenyl‐sulfid kristallisieren mit athermischer Keimbildung aus der Schmelze sphärolithisch. Es wurden verschiedene morphologische Strukturen beobachtet. Die lichtmikroskopische Bestimmung der Sphärolith‐Wach…
Electrodeposited Composite Coatings
SummaryExperiments investigating a novel method of preparing composite coatings are described. In this method, the dispersed phase, which may be fibrous or granular, is incorporated into a metallic matrix by suspending the fibres or particles in a plating bath suitable for electroplating the matrix material. Provided…
910. Kinetics of the thermal decomposition of sodium azide
P. W. M. Jacobs and A. R. T. Kureishy, J. Chem. Soc., 1964, 4718 DOI: 10.1039/JR9640004718
Surface Activity at Organic Liquid-Air Interfaces
The present investigation describes the successful modification of the surface properties of polymeric solids by the adsorption of appropriate partially fluorinated compounds at polymer-air interfaces during the formation of the polymer surfaces. The extent of additive adsorption was found to be dependent upon the mol…
Chemical Studies on the Constitution of Some Pollen and Spore Membranes
(1964). Chemical Studies on the Constitution of Some Pollen and Spore Membranes. Grana Palynologica: Vol. 5, No. 2, pp. 247-252.
Ultrasonic Relaxation near the Curie Temperature of Ferroelectric Triglycine Sulfate
According to a theory developed by Landau and Khalatnikov, the approach of long-range order to equilibrium can be characterized by a relaxation time with a temperature dependence of the form: τ=β/(Tc − T), where β is constant and Tc is a second-order phase transition temperature. The ferroelectric material, triglycine…
The Fate of the Intact Orb Web of the Spider Araneus Diadematus Cl. 1)
When spider webs were left intact in the aluminum-glass boxes in the laboratory, most animals ate old webs daily and built new ones. The new webs were built with a larger amount of thread protein, increasing steadily in weight with increasing length of the non-elimination period, to more than 3 times in 8 days. The in…
7—A GENERAL SYSTEM OF WOVEN-FABRIC GEOMETRY
The principles of plain-weave geometry established by Peirce1 and Kemp2 are extended to weaves other than plain to give a system of fabric geometry applicable to all types of woven cloths. A particular application of the system to the measurement and specification of fabric tightness is also described.
Semiconducting Behavior of Substituted Tungsten Diselenide and Its Analogues
Tantalum substitutions up to 5 atomic per cent (a/o) of the cations have been made in the three Group VIB dichalcogenides, , , and . Tantalum‐substituted p‐type had the best thermoelectric properties with a figure of merit about . Substitution of a number of other elements was attempted in the compounds and , but only…
Photoconductivity in Ag2O
Abstract The spectral distribution of photoconductivity in Ag 2 O was measured on samples prepared in three different ways. The photoresponse was found to depend on the mode of preparation of samples and on previous light exposure. Samples prepared by pressing Ag 2 O powder against a cellulose backing showed a photoco…
75. Diffuse-reflectance spectra of some anhydrous transition-metal halides
R. J. H. Clark, J. Chem. Soc., 1964, 417 DOI: 10.1039/JR9640000417
Room Temperature Oxidation of Iron at Low Pressures
The oxidation at 300° K of high purity iron surfaces prepared under ultra-high-vacuum conditions was studied using ellipsometry to measure film thickness. By working at low oxygen pressures (between 10–7 and 10–4 torr) it was found that the early stages of the oxidation process followed a linear growth law with rate b…
Shear and Structural Relaxation in Molten Zinc Chloride
Longitudinal ultrasonic absorption and velocity measurements were made in molten zinc chloride in the frequency range 5–95 Mc/sec. Shear relaxation measurements were obtained in the frequency range 43–118 Mc/sec. A single relaxation time was observed for the absorption of longitudinal waves at each temperature investi…