Materials Literature
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It has been found that the current-field characteristic of silver sulphide is non-linear and that switching can occur between a high-resistance and a low-resistance state. It is shown that this behaviour is consistent with the rapid rise of electrical conductivity with temperature in the β-phase and a discontinuous in…
This study is concerned with the establishment of structural properties common to all borides and modifications of boron which contain B 12 polyhedral units. It has been found that all unit-cell dimensions in these structures can be derived from simple arrangements of B 12 units which can be regarded as large metallic…
Machine learning (ML) is transforming all areas of science. The complex and time-consuming calculations in molecular simulations are particularly suitable for an ML revolution and have already been profoundly affected by the application of existing ML ...Read More
The deformation of glassy polystyrene under a fixed tensile dead load can take place in three different modes: (a) drawing by formation and propagation of a neck, (b) drawing by proliferation of deformation bands without necking, and (c) homogeneous creep. Which mode is observed depends primarily on stress level and t…
A comparison between infrared absorption and neutron inelastic-scattering measurements indicates the existence of a broad low-energy (around 400 cm−1) protonic level in KH2PO4 above the Curie point. This level is only weakly discerned in the ir but is seen quite clearly in neutron scattering. The mode is explained as…
Abstract Heat capacities have been measured for strontium and lead dicalcium propionates from 15 to 300°K with an adiabatic-type calorimeter in connection with the ferroelectric phase transition of strontium salt. The heat capacities, enthalpies, entropies and Gibbs energy functions in the standard state have been det…
The Laplace transform technique has been used to develop asymptotic solutions to the integral equations describing the radiation damage displacement cascade, for scattering laws whose symmetrical parts are functions of the relative transferred energy alone. The solutions are presented explicitly for the truncated Coul…
Polypropylene aggregates, consisting of interwoven arrays of single-crystal lamellae, have been obtained by crystallization of samples of isotactic polypropylene from dilute solutions held at constant temperatures between 85° and 115°C. The solvent used was α-chloronaphthalene with polymer concentrations ranging from…
The low-angle light scattering for anisotropic disks (representing two-dimensional polymer spherulites) is calculated for the cases of (1) the optic axis lying in the plane of the disk and tilted at the angle β to the radius, (2) the optic axis rotating cylindrically about the radius through the angle ω while making a…
The dynamic properties of a series of carbon black-filled natural rubber vulcanizates have been studied for their amplitude dependence. The HAF blacks studied possessed low, normal, or high structure, and one series of the high structure blacks was subjected to heat treatment up to 2700°C. The effect of heat treatment…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInvestigation of the Metallic Phases in Reduced, Impregnated Nickel and Nickel—Copper Silica—Alumina CatalystsHarold E. Swift, Frank E. Lutinski, and William L. KehlCite this: J. Phys. Chem. 1965, 69, 10, 3268–3274Publication Date (Print):October 1, 1965Publication History P…
Evaporated single crystal films of gold-palladium alloys were studied by electron diffraction, compositions of the alloys widely ranging from 10 to 60 atomic per cent palladium. An ordered phase with the Cu 3 Au type structure was found to exist in the region of composition around 25 atomic per cent palladium. The ord…
The deformation of single crystals of iron 3% silicon having orientations between [001]-[111] and [111]-[110] has been studied as a function of orientation and temperature. At 293°K the operative slip systems, determined by slip trace analysis, were close to those of maximum resolved shear stress though the orientatio…
Machine learning (ML) is transforming all areas of science. The complex and time-consuming calculations in molecular simulations are particularly suitable for an ML revolution and have already been profoundly affected by the application of existing ML ...Read More
It is suggested that, in spite of its well–known limitations (/), the Kozeny–Carman equation can provide a reasonably satisfactory description of the major features of fluid flow through textile materials, provided that the fluid flow is streamline and that the permeability of the yarns themselves is taken into accoun…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTKinetic and Infrared Study of Photochromism of Metal DithizonatesL. S. Meriwether, E. C. Breitner, and N. B. ColthupCite this: J. Am. Chem. Soc. 1965, 87, 20, 4448–4454Publication Date (Print):October 1, 1965Publication History Published online1 May 2002Published inissue 1 O…
The Laplace equation for the pressure drop across curved liquid-gas interfaces is applied to the solution of the profile of a static liquid meniscus on the outside of a wire of circular cross-section. The resulting differential equation is integrated numerically, an operation complicated by the existence of boundary c…
The piezoelectric modulus d 33 , electromechanical coupling factor k 33 and elastic compliance coefficients s 33 D , s 33 E of SbSI have been determined by measuring the resonant and anti-resonant frequencies on single crystals of 3 mm in length and 0.7×0.7 mm 2 in cross section. The d 33 has been found to show the hi…
The crystal structure of erbium titanate, Er 2 Ti 2 O 7 , has been shown by X-ray and neutron powder diffraction to be of the cubic pyrochlore type, with a o = 10.0762 ± 6 Å. Least-squares isotropic refinement based on resolved single reflections gave x(O 2 ) = 0.4200 ± 10 and R = 2.25%. Ionic and neutral X-ray scatte…
1. The effect of ultraviolet irradiation on acid-soluble and neutral-salt-soluble calf-skin collagen was studied by chromatography, gel filtration, amino acid analysis and sedimentation of the sub-units, and the reaction kinetics of degradation were obtained from viscosity and optical rotation measurements. 2. It was…