Materials Literature
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The mechanism of dislocation loop formation by vacancy condensation is examined in a quantitative manner. The critical vacancy supersaturation necessary for the growth of the loops and the climb rate of the dislocations are determined. It is shown that the mechanism proposed for lineage formation based upon loop growt…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAn Analysis of Polymorphism in Boron Based upon X-Ray Diffraction Results1J. L. Hoard and Arthur E. NewkirkCite this: J. Am. Chem. Soc. 1960, 82, 1, 70–76Publication Date (Print):January 1, 1960Publication History Published online1 May 2002Published inissue 1 January 1960htt…
Silver selenide has been prepared by fusion techniques and found to be a good thermoelectric material. The Seebeck coefficient, resistivity, and thermal conductivity have been measured as a function of temperature. The effect of doping with 30 different elements and compounds at different doping concentrations has bee…
When copper disks rotate in sulfuric acid solutions, the observed rate of dissolution is first order with respect to the concentration of dichromate ion used as a depolarizer. By studying the effect of temperature and stirring speed at high and low acid concentrations, the process is shown to be determined completely…
Research Article| December 01, 1960 DIAMICTITE, A SUBSTITUTE TERM FOR SYMMICTITE R. F FLINT; R. F FLINT YALE UNIVERSITY, NEW HAVEN, CONN. Search for other works by this author on: GSW Google Scholar J. E SANDERS; J. E SANDERS YALE UNIVERSITY, NEW HAVEN, CONN. Search for other works by this author on: GSW Google Schola…
ELASTICITY OF POLYMER 'WORKS CROSS-LINKED IN ELASTICITY OF POLYMER 'WORKS CROSS-LINKED IN BY P. J. FLORY Mellon Institute, Pittsburgh, Pa. Received 1st June, 1959 The theory of elasticity of composite network (Berry, Scanlan and Watson, 1956) formed by introducingvl/2 cross linkages in a state of iso
J. R. Millar, J. Chem. Soc., 1960, 1311 DOI: 10.1039/JR9600001311
Lead zirconate titanate ceramics with certain 3- or 5-valent additions (lanthanum, neodynium, tantalum, and niobium) are found to be characterized by low aging of electrical and mechanical properties, a well-defined hysteresis loop, and by high electrical and mechanical losses. Experimental investigations are reported…
Abstract The active transports of sodium and chloride ions, between the vacuole and environmental solutions, were measured in the giant coenocyte of the marine alga Halicystis ovalis. Ion fluxes, determined isotopically, of individual single cells were measured by the short‐circuit technique of U ssing and Z erahn (19…
Abstract Results of new research work in the field of polymers with an ordered steric structure, obtained by stereospecific polymerization, are reported. Some of the results concern the relationship between steric structure and crystallinity; from these it results that a regular steric structure is a necessary, but no…
A study of the effects of very high electron densities on the absorption of radiation by free-free electron transitions. The absorption coefficient is expressed in terms of a dimensionless quantity known as the Gaunt factor.
ABSTRACT High-pressure compaction studies (up to 200,000 psi) were conducted on kaolinite, illite, and montmorillonite clays and a natural organic colloid of Iranian origin, gum tragacanth. The remaining moisture content in per cent (dry weight) was plotted versus the logarithm of pressure in psi. For kaolinite clay t…
The five independent elastic constants of beryllium have been determined with the pulse echo technique at a frequency of 10 Mc/sec. The values extrapolated to 0°K are C11=29.94±0.06, C33=34.22±0.12, C44=16.62±0.05, C12=2.76±0.08, C13=1.1±0.5 in units of 1011 dyne/cm2. Voigt averaging and Reuss averaging of the single…
This is the Thirty-fourth Edward De Mille Campbell Memorial Lecture, presented by Alexander R. Troiano, Chairman, Department of Metallurgical Engineering, Case Institute of Technology, Cleveland. The lecture was presented November 4, 1959 during the Forty-first Annual Convention of the American Society for Metals, hel…
The optical behaviour of a surface carrying a transition layer is discussed, as a problem in scattering. The results are given of the application of electromagnetic theory to the case of a single parallel-sided film. Methods are given for extending this treatment to the case of multiple parallel-sided layers. Both ana…
Measurements of change in length and change in lattice parameter were made at identical temperatures on 99.995% aluminum in the temperature range 229 to 656\ifmmode^\circ\else\textdegree\fi{}C. Length changes, $\ensuremath{\Delta}L$, were measured on an unconstrained horizontal bar sample using a rigid pair of filar m…
in the free growth rate law is predicted under various assumptions. To the extent that comparison is possible, the predictions given agree with the experimental results obtained by Keller and O'Connor and others on single crystals of unbranched polyethylene grown from dilute solution. A survey is given of homogeneous…
Abstract not Available.
Fixed tissue is dehydrated with tertiary butyl alcohol overnight. The following day it is cleared in toluene, infiltrated and embedded in Araldite resin-hardener-accelerator mixture without dibutyl phthalate, and polymerized at 60° C. More rapid than previous techniques, this method gives blocks which do not fracture…
Abstract The ultra-microtome has been used to obtain thin sections of synthetic graphite blocks. The thickness of the sections was measured by shadowcasting and measuring the shadow length at appropriate edges. An average value of 150 Å was obtained. Transmission electron micrographs of thin sections showed moire patt…