Materials Literature
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A method has been developed for the study of grain boundary migration in high purity aluminum, which allows positive determination of the direction of grain boundary movements. By means of this method it was confirmed that the migration of grain boundaries resulting from surface energy takes place in the direction tow…
The accuracy of the Scherrer crystallite size equation is limited in part by the uncertainty in β, the experimentally deduced pure diffraction broadening. Currently used procedures for estimating β from the observed breadth of a Debye-Scherrer line are not, in general, applicable to the x-ray spectrometer. By making u…
Consider a phase transition α⇄β. Stable β-embryos can be retained in the temperature range of α-stability in cavities of suitable extraneous solids present in the system. Retained β-embryos may nucleate the α→β-transformation in the range of β-stability. Using these concepts a theory for the effect of thermal history…
An attempt is made to calculate the increase in the residual electrical resistance of cold-worked metals by attributing the effect to an elastic distortion similar to that produced by the presence of edge type dislocations. It is shown that, in single crystals, the direction of the dislocation axes, the slip direction…
J. A. Mair and J. L. T. Waugh, J. Chem. Soc., 1950, 2372 DOI: 10.1039/JR9500002372
G. M. Badger, M. L. Jones and R. S. Pearce, J. Chem. Soc., 1950, 1700 DOI: 10.1039/JR9500001700
The chemical constitution and physical state of natural rubber in its viscous, high-elastic and crystalline conditions are described. It is shown that those depend on long hydro-carbon chains which are normally coiled and tangled. The high elasticity of rubber is made possible by the ability of the chains to straighte…
J. A. Mair, J. Chem. Soc., 1950, 2364 DOI: 10.1039/JR9500002364
The adsorption of water vapor by co ll agen, commercial hide powder, and severa l leathe rs was determined at various relative humidities ranging from about 0 to 96 percent, at 28, 50, and 70 C. Determi nations were also made on chestnut a nd quebracho tann ins at 28 C at vari o us re lative humi dities. The results i…
Two classes of rare earth activated phosphors having interesting and unusual properties are described. The first series, consisting of alkaline earth silicates activated by divalent europium, shows a wide range of fluorescent colors when excited by 3650 Å radiation. Some of these compounds are characterized by the sta…
A slab with one surface cut and etched parallel to (100) crystallographic planes formed the cathode in a low power electron microscope. The electron image of the cathode was formed on a fluorescent screen with a small hole at the center. An electron collector placed behind the hole permitted a measure of the electron…
The physical properties of 2-mercapto benzimidazole and main methods for its preparation are introduced.The situations of production and demand for 2-mercapto benzimidazole in China and in Japan are described in brief. Meanwhile,the application fields of 2-mercapto benzimidazole as rubber antioxidant and pharmacy inte…
"Internal structure of granitic pegmatites." Geologiska Föreningen i Stockholm Förhandlingar, 72(3), pp. 361–362
The so-called “MOBA” or “Zostera-zone ” is a place of interest from the view-point of fishery in the inland sea. In Ikawazu-cove Zostera marina and Z. nana make “MOBA”, where the ecological studies on Zosterae has been carried out. In this paper the enviromental factors-hydrographycal and biological-which seem to corr…
M. T. Simnad and U. R. Evans, Trans. Faraday Soc., 1950, 46, 175 DOI: 10.1039/TF9504600175
T. A. Rafter, Analyst, 1950, 75, 485 DOI: 10.1039/AN9507500485
L. R. G. Treloar, Trans. Faraday Soc., 1950, 46, 783 DOI: 10.1039/TF9504600783
The assumption of a unimolecular layer as the surface phase separating a strictly regular solution from its vapour phase, is in contradiction with the Gibbs adsorption formula. When, however, one takes into account the possible presence of two unimolecular layers inside the surface phase, it is shown that the composit…
R. P. Linstead and F. T. Weiss, J. Chem. Soc., 1950, 2975 DOI: 10.1039/JR9500002975
Abstract Les auteurs décrivent la technique d'extraction adoptée pour le fractionnement du polythène après avoir exposé les difficultés expérimentales d'une détermination des courbes de polydispersité de ce polymère d'après les méthodes classiques de précipitation. Les trois échantillons étudiés ont des poids molécula…