Materials Literature
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The effect of combined hydrostatic pressure, P, and of uniaxial tension, [sgrave], on the rupture time of polycrystalline copper wire in the temperature range 400° to 500°c has been determined. All the specimens broke by intergranular fracture, due to the growth of voids along grain boundaries. Preliminary experiments…
The ground-state wave function of the antimony, phosphorus, and arsenic impurities in silicon has been investigated by means of the electron nuclear double resonance (ENDOR) method. By this method the hyperfine interactions of the donor electron with the ${\mathrm{Si}}^{29}$ nuclei situated at different lattice sites…
After a critical review of the present state of knowledge about thermoluminescence, which is shown to be rather unsatisfactory, the present paper considers in detail thermoluminescence arising from thermal bleaching of $F$-centers in irradiated alkali halides. A model is proposed, which leads to second-order kinetics…
A theory of the scattering of phonons by static elastic strain fields is presented. It is found that the Fourier component of the strain field plays a role similar to that of the potential in the external field approximation. All quantities (except the strain field) in the formulas obtained refer to specifically atomi…
Abstract The tendency for stretched rubber, when subjected to outdoor exposure, to form cracks perpendicular to the direction of stress was originally known as suncracking. The work of Newton showed that light was not necessary and identified ozone as the causative agent. That ozone is the principal factor there seems…
It is shown that long-period count variations in the weft yarn cause variations in pickspacing which to some extent compensate for the effect of yarn irregularity on the weft cover factor. The significance of this fact in relation to the diagnosis of weft bars, to fabric design, and to loom design, pointed out. It is…
To obtain an equilibrium between titanium and magnesium at high temperatures, an air-tight titanium container, in whlch a magnesium rod or a mixture of titanium and magnesium in equal parts was placed, was heated to various temperatures up to 1200 C. The results of microscopic, x-ray, and electron diffraction studies…
Abstract In order to assign the CH, CH 2 ‐vibration modes and the skeletal modes in the spectrum of polyvinyl chloride, we obtained deuterated polyvinyl chloride and the infrared spectrum of it, and we assumed that frequencies of the skeletal modes and the C‐Cl stretching modes may not change drastically by deuteratio…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPore Structure of Sintered Glass from Diffusion and Resistance MeasurementsI. FattCite this: J. Phys. Chem. 1959, 63, 5, 751–752Publication Date (Print):May 1, 1959Publication History Published online1 May 2002Published inissue 1 May 1959https://pubs.acs.org/doi/10.1021/j150…
A phenotypic male of Mollienesia formosa, a gynogenetic fish, has been collected at Brownsville, Texas. The male and female fish are essentially similar, and their morphology supports a hypothesis that the species is of hybrid origin.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSyntheses of Thermochromic Ethylenes. A Study of the Relationship between Constitution and ThermochromismAlexander Schönberg and Mahmoud Mohamed SidkyCite this: J. Am. Chem. Soc. 1959, 81, 9, 2259–2262Publication Date (Print):May 1, 1959Publication History Published online1…
Diffusion rates of chromium in the body centred cubic phase of the titanium—chromium system have been measured by an autoradiographic tracer technique using the radioactive isotope 51Cr. Two alloys, Ti + 10% Cr and Ti+18% Cr (by weight), in addition to two grades of Ti metal, ‘iodide’ and ‘commercial’, were used as so…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEquilibrium Polymerization of ε-CaprolactamA. V. Tobolsky and A. EisenbergCite this: J. Am. Chem. Soc. 1959, 81, 10, 2302–2305Publication Date (Print):May 1, 1959Publication History Published online1 May 2002Published inissue 1 May 1959https://pubs.acs.org/doi/10.1021/ja0151…
Abstract Published data on the solubility properties and diffusion coefficients for water in polyethylene are critically examined and related to the permeability coefficients analyzed in a previous paper. The data examined in the present article are even more variable than the permeability data, the measured diffusion…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAddition of Carbon Monoxide to Acetylene Dicobalt Hexacarbonyl. A New Type of ComplexHeinz W. Sternberg, Julius G. Shukys, Charles Delle Donne, Raymond Markby, Robert A. Friedel, and Irving WenderCite this: J. Am. Chem. Soc. 1959, 81, 10, 2339–2342Publication Date (Print):Ma…
The concentration of negative ions in the positive column of an oxygen discharge has been measured by a Langmuir probe technique. It is shown how the negative ions affect the ambipolar diffusion and potential distribution in such a plasma. (W.L.H.)
The dielectric loss in 66 nylon (polyhexamethylene adipamide) has been studied over a range of temperatures (—40 to 100°C) and frequencies (50 cps—70 Mc). The effects of radiation induced crosslinking and hydrogen bonding solutes were studied. The principal dipole orientation absorption is similar to that in amorphous…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSemiconductors and Phosphors.H. E. FarnsworthCite this: J. Am. Chem. Soc. 1959, 81, 9, 2281Publication Date (Print):May 1, 1959Publication History Published online1 May 2002Published inissue 1 May 1959https://pubs.acs.org/doi/10.1021/ja01518a081https://doi.org/10.1021/ja0151…
Two methods for reducing internal corrosion of tankers are described. These methods involve (1) flotation of an oil soluble inhibitor on ballast water to coat the internal surfaces of the tanks, and (2) fogging of inhibitor into empty tanks using an inert dispersant. Both methods were tested in the laboratory as well…
Abstract A study of soil Al extraction by various chemical reagents has been conducted. Using N NH 4 OAc solutions buffered at six different pH levels, it was found that the lower the pH of the solution the more Al was extracted. Neutral normal solutions of BaCl 2 , CaCl 2 , KCl, NH 4 Cl, and a solution of BaCl 2 in t…