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Uber chemische einwirkungen auf beton
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The effect of cross-linking on the elastic modulus of Polythene
Abstract Young’s modulus for Polythene, cross-linked by pile irradiation, has been measured by both static and dynamic means. Below about 115°C (the usual melting-point) the modulus decreases with temperature. Above this temperature it increases again, in agreement with the theory of rubber-like elasticity, except for…
A Neutron Diffraction Study of Magnesium Ferrite
Neutron diffraction patterns have been obtained for polycrystalline magnesium ferrite. Application of a suitably oriented strong magnetic field has made possible a separation of the coherent scattering into its nuclear and magnetic parts. The magnetic scattering is found to be in good agreement with the N\'eel model o…
Laboratory measurement of the corrosion of ferrous metals in soils
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…
Aliphatic Organo-functional Siloxanes1
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…
Search for Double Beta-Decay inSn124andZr96
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…
Acid and alkaline hydrolysis of gelatin
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
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…
Activation Energy for Viscous Flow and Short-Range Order
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…
HELICAL POLYPEPTIDE CHAIN CONFIGURATION IN COLLAGEN1
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…
The Vapor Pressure and Critical Constants of Uranium Hexafluoride1
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…
The Origin of Damping in High-Strength Ferromagnetic Alloys
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…
16—MEASUREMENTS OF THE INFLUENCE OF FINISHING AGENTS ON THE FRICTION OF FIBRES
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…
The Investigation of Electron Distribution in Atoms by Electron Diffraction
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…
STUDIES ON SHELL FORMATION. III. MEASUREMENT OF CALCIUM DEPOSITION IN SHELL AND CALCIUM TURNOVER IN MANTLE TISSUE USING THE MANTLE-SHELL PREPARATION AND Ca45 ,
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…
Studies on egg shells. II.—A method for marking and counting pores
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…
The Reaction of Carbon Monoxide with Free Radicals
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…