Materials Literature
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Experiments are reported in which novel results are found on the magneto-resistance of sodium and rubidium. Measurements have been made both on plate-like specimens which show very strong anisotropy in the magnetic field, and on a cylinder of diameter large comparedwitli the mean free path, ι, of the electrons. The an…
The electrodeposition of Mg from ether solutions of such Mg compounds as ( a ) halides, ( b ) aluminohydrides, ( c ) borohydrides, and ( d ) Grignard reagents was investigated. White, metallic deposits containing 90% Mg and 10% B were obtained from an ether solution of and . However, thick deposits could not be built…
Summary A heat-labile, nondialyzable factor with nerve growth-promoting properties has been partially purified from Sarcoma 180. The data indicate that the active material is a protein or is bound to a protein and that nucleic acids are not involved in its effectiveness. The factor must be continuously present in the…
Abstract not Available.
P. L. Allen and A. Hickling, Trans. Faraday Soc., 1957, 53, 1626 DOI: 10.1039/TF9575301626
Low‐pressure solubilities were determined for H in α‐ and β‐Zr and in two Zr‐O alloys at 700°–1000°C and pressures of 0.1–4 µ Hg. The data followed Sieverts' law for each phase, and H solubility decreased with increasing temperature at a given pressure. Also, there was a slight increase in H solubility in α ‐Zr with i…
A Monte Carlo method is used to estimate the frequency functions of various angles in a random aggregate of cubic crystals. Estimates are made of the frequency function for the angle of disorientation, i.e. the least angle of rotation required to rotate a crystal into the same orientation as a neighbouring crystal, an…
The permeation process consists of the steps: adsorption, solution, diffusion, and desorption. These are discussed for glasses, polymers, and metals. There are two generalizations: (1) All gases go through all polymers. (2) No rare gas permeates any metal. Criteria are given for measurements of the permeation process.…
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Abstract not Available.
Anderson's treatment of super-exchange yields a qualitative rule for the dependence of interaction on angle Me—O—Me. Using this rule, and assuming a longer distance to lead to a weaker interaction, low-temperature saturation magnetizations for ferrimagnetic oxides with known crystal structures can often be predic…
Abstract not Available.
A semiempirical method for the determination of mass absorption coefficients for the very soft x-ray region of 5 to 50 A is described. A universal function for the absorption by K-shell electrons and another for absorption by L and extra-L shell electrons are given in table form to permit the calculation of mass absor…
R. K. Hart, Trans. Faraday Soc., 1957, 53, 1020 DOI: 10.1039/TF9575301020
The oxidation‐reduction kinetics of the ferrous‐ferric sulfate system have been measured on a stainless steel surface. The data completely support theoretical equations which describe the potential‐current relationships for such a system. The analysis applies to reversible electrodes and to corroding electrodes where…
The titanium--oxygen system has been studied by means of x-ray powder photographs of preparations quenched after annealing at various temperatures. A number of phases not previously described has been observed, viz., Ti/sub 2/O, TiO (low-temperature modification), Ti/sub 4/O/sub 7/, Ti/sub 5/O/su b 9/, Ti/sub 6/O/sub…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Application of Differential Thermal Analysis to the Study of Reaction Kinetics1Hans J. Borchardt and Farrington DanielsCite this: J. Am. Chem. Soc. 1957, 79, 1, 41–46Publication Date (Print):January 1, 1957Publication History Published online1 May 2002Published inissue 1…
At low overvoltage values, deviations from Tafel behavior for a noncorroding electrode are due primarily to the reverse reaction of the oxidation‐reduction system, and at high overvoltages to concentration and/or resistance polarization. It is shown further that the practice of placing straight lines through a few exp…
Electron ejection from metals by ions is shown in this work to be a surface-sensitive phenomenon which is profoundly affected by the adsorption of a monolayer of foreign gas on an atomically clean metal surface. Monolayer adsorption is shown to decrease the total electron yield, ${\ensuremath{\gamma}}_{i}$, primarily…
The effects of strain amplitude on the internal friction and the Young's modulus of polycrystalline specimens of copper alloys (Cu–Zn, Cu–Al, Cu–P) with various concentrations of solute atoms have been investigated. The results are: 1. The critical stress, up to which the internal friction and the Young's modulus are…