Materials Literature
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A method is described for settin g up soil-corrosion ce lls using a so il-we t ting procedure t hat give s rep rodu cible res ul ts. By m eas urin g t he weigh t losses o n cell e lectrodes made of steel a nd of cast. iro n afte r ex pos ure to vari ous soils for 6 m o nt hs, it. wa pos ible to co mpare t he e ffects…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAliphatic Organo-functional Siloxanes1L. H. Sommer, R. P. Pioch, N. S. Marans, G. M. Goldberg, J. Rockett, and J. KerlinCite this: J. Am. Chem. Soc. 1953, 75, 12, 2932–2934Publication Date (Print):June 1, 1953Publication History Published online1 May 2002Published inissue 1…
If double beta-decay takes place without the emission of neutrinos, the total kinetic energy of the two emitted electrons will be constant. The half-life would be of the order of ${10}^{16}$ years for 1.5-Mev available energy or ${10}^{14}$ years for 3.5-Mev available energy.${\mathrm{Sn}}^{124}$ and ${\mathrm{Zr}}^{9…
Abstract A study has been made of the thermal decomposition of an alkaline ossein‐gelatin in dilute solutions of hydrochloric acid and sodium hydroxide within a pH range of 3·05 to 9·85. Reaction temperatures of 60°, 70° and 80° have been employed, the reaction being followed by the decrease in jelly strength, measure…
A two-dimensional load-extension tester for woven fabrics has been constructed. The ap paratus imposes simultaneous extensions on a sample in two mutually perpendicular directions. A strain-sensing element measures the internal strain developed in the homogeneously strained region as a function of the dynamically vary…
Viscosity-temperature properties of many systems are characterized by highly temperature dependent activation energies for viscous flow. It is generally recognized that structural changes taking place in the material as a function of temperature are responsible for this phenomenon. In this paper a formulation of visco…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHELICAL POLYPEPTIDE CHAIN CONFIGURATION IN COLLAGEN1Carolyn Cohen and Richard S. BearCite this: J. Am. Chem. Soc. 1953, 75, 11, 2783–2784Publication Date (Print):June 1, 1953Publication History Published online1 May 2002Published inissue 1 June 1953https://pubs.acs.org/doi/1…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Vapor Pressure and Critical Constants of Uranium Hexafluoride1George D. Oliver, H. T. Milton, and J. W. GrisardCite this: J. Am. Chem. Soc. 1953, 75, 12, 2827–2829Publication Date (Print):June 1, 1953Publication History Published online1 May 2002Published inissue 1 June…
Abstract A theoretical analysis and test data are presented which explain the damping capacity of standard high-strength alloys in terms of the magnetostrictive effect. Conditions for obtaining maximum damping are described and the results of experiments are reported which provide a firm basis for the development of h…
Experiments with continuous yarns, treated with a large variety of finishing agents, in which the coefficient of friction was measured by an inclined-plane method, yielded useful information on the properties of finishing agents on the one hand and also led to the development of a measuring technique for short fibres…
A procedure is developed for obtaining the radial distribution of electrons in free atoms from electron diffraction data which makes use of the similarity of the expressions characterizing the scattering of fast electrons and x-rays by atoms. Requirements are formulated pertaining to accuracy and angular range of data…
1. A study of calcium turnover and calcium deposition by the oyster mantle in the absence of other soft tissues has been carried out using mantle-shell preparations of Crassostrea virginica.2. The mantle of the mantle-shell preparation is able to deposit calcium from the sea water in shell. At least part of the calciu…
Abstract A method has been developed for marking the pores in egg shells by immersing them in concentrated nitric acid for very short periods of time. This makes the pores easily visible under the microscope, and counting can then be done by a statistical method. Not only is the total number of pores determined, but a…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Reaction of Carbon Monoxide with Free RadicalsGerald B. Porter and Sidney W. BensonCite this: J. Am. Chem. Soc. 1953, 75, 11, 2773–2774Publication Date (Print):June 1, 1953Publication History Published online1 May 2002Published inissue 1 June 1953https://pubs.acs.org/doi…
The anisotropy energy of CuCl2-2H2O having an orthorhombic symmetry can be expressed by K1β2 + K2γ2, where β and γ are the direction cosines of the magnetic moment with respect to the b-axis and the c-axis. The calculated values of K2 arising from the magnetic dipole interaction nearly accords with the experimental va…
Knowledge of the natural frequencies of air-core and iron-core coils and of transformer and generator windings is of essential theoretical and practical importance. In this paper an equivalent circuit method is derived for the computation of all the natural frequencies of interest of both air-core and iron-core coils.…
A brief survey is given of the methods of examining opaque specimens in the electron microscope. The principle of the scanning electron microscope is described and mention is made of previous instruments. The design of such microscopes is discussed and the theoretical limit on performance is determined. The optimum sc…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Hydrolysis of Methoxysilanes. DimethylsilanediolSimon W. KantorCite this: J. Am. Chem. Soc. 1953, 75, 11, 2712–2714Publication Date (Print):June 1, 1953Publication History Published online1 May 2002Published inissue 1 June 1953https://pubs.acs.org/doi/10.1021/ja01107a048…
A constant stress testing machine of small inertia and with continuous strain recording has been built. The loading was by air contained in metallic bellows whose wall stiffness was compensated by a `negative spring'. The initial strain rate was standardized at 1% per second. Polycrystalline copper and aluminium have…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHigh-temperature Heat Contents of Tantalum and Niobium OxidesRaymond L. OrrCite this: J. Am. Chem. Soc. 1953, 75, 12, 2808–2809Publication Date (Print):June 1, 1953Publication History Published online1 May 2002Published inissue 1 June 1953https://pubs.acs.org/doi/10.1021/ja0…