Materials Literature
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The manner in which underwater explosions differ from low-amplitude point sources of sound is considered theoretically, especially effects due to cavitation near the sea surface. Some measured differences between the acoustic source levels of various size charges and some absolute charge source levels are given. These…
Abstract A rapid method for determining the degree of crosslinking in elastomers is described which involves measuring equilibrium compression modulus at very small deformations on solvent‐swollen samples. The elastomer used was a polyether urethane vulcanized by an accelerated sulfur recipe. The degree of crosslinkin…
A simple theory concerning the reflection of electrons from solid targets is derived, based on the following assumptions: (1) the primary cause of electron reflection from a solid material is Rutherford scattering through angles greater than 90°; (2) the energy loss of electrons penetrating a solid target is given by…
The performance characteristics of a conventional thermoelectric generator operating under constant heat flux conditions have been computed. Expressions for power output, optimum efficiency, and optimum ratio of internal-to-load resistance show that optimization requires operating conditions appreciably different from…
Factors affecting the resistance to bending offered by fibres, yarns and woven fabrics are considered. Fibre stiffness depends upon fibre material, shape of cross-section and denier. Yarn stiffness is usually controlled by fibre stiffness, being little affected by twist under normal conditions of lubrication. When yar…
The solid-liquid interface shape during growth from the melt has been determined for pure materials in the vicinity of external and internal surfaces; both the cases of isotropy and anisotropy of solid-liquid interfacial energy have been considered. From these considerations it is possible to determine some effects as…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA Thermodynamic Analysis of the High-temperature Vaporization Properties of Silica.Harold L. SchickCite this: Chem. Rev. 1960, 60, 4, 331–362Publication Date (Print):August 1, 1960Publication History Published online1 May 2002Published inissue 1 August 1960https://pubs.acs.o…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation Oliver H. LeBlanc; Hole and Electron Drift Mobilities in Anthracene. J. Chem. Phys. 1 August 1960…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPyrromethanes and Porphyrins Therefrom1G. P. Arsenault, E. Bullock, and S. F. MacDonaldCite this: J. Am. Chem. Soc. 1960, 82, 16, 4384–4389Publication Date (Print):August 1, 1960Publication History Published online1 May 2002Published inissue 1 August 1960https://pubs.acs.org…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSTUDY OF THE CHANGE IN SPECIFIC HEAT OF MONOMERIC AND POLYMERIC GLASSES DURING THE GLASS TRANSITIONBernhard WunderlichCite this: J. Phys. Chem. 1960, 64, 8, 1052–1056Publication Date (Print):August 1, 1960Publication History Published online1 May 2002Published inissue 1 Augu…
The self-diffusion coefficient of oxygen has been determined as a function of temperature in single crystal and polycrystalline aluminum oxide at temperatures up to 1780°C. The rate of exchange between a gas phase and solid particles was measured, utilizing the stable isotope, O18. In single crystals of aluminum oxide…
The paper comprises theoretical and experimental studies of the lattice dynamics of alkali halides. A theory of the lattice dynamics of ionic crystals is given based on replacement of a polarizable ion by a model in which a rigid shell of electrons (taken to have zero mass) can move with respect to the massive ionic c…
Effects of magnetoresistance and extraordinary Hall effect on the propagation of electromagnetic waves through very thin sheets of ferromagnetic conductors are studied. These contributions to the conductivity produce electric fields varying like products of current and magnetization and introduce nonlinear interaction…
The magnetic after-effect in iron at high temperatures due to motion of dislocations is investigated. The specimens, consisting of a few large crystals, are examined, some after a careful annealing and some after a small plastic deformation. The intensity of the after-effect is measured as the horizontal displacement…
Measurements of the absorption coefficient between 10 and 300 ${\mathrm{cm}}^{\ensuremath{-}1}$ have been made with crystals of CdS in polarized light between 20 and 300\ifmmode^\circ\else\textdegree\fi{}K, at wavelengths near 5000 A. Analysis of the results at various temperatures near 70\ifmmode^\circ\else\textdegre…
Relative changes in macroscopic length, $\frac{\ensuremath{\Delta}L}{L}$, and x-ray lattice parameter, $\frac{\ensuremath{\Delta}a}{a}$, of a 99.999% silver bar have been measured from 14 to 956\ifmmode^\circ\else\textdegree\fi{}C, using a rigid parallel pair of filar micrometer microscopes and a rotating single-cryst…
The conduction-electron diamagnetism has been calculated for the three-dimensional band structure of graphite. The magnetic energy levels are found and the susceptibility calculated by analytically carrying out the free energy sum. Agreement with experiment is found for values of the band parameters nearly equal to th…
An expression is obtained for the lattice thermal conductivity at high temperatures in the limit when the scattering of phonons by point defects is stronger than by umklapp processes. The latter limit the phonon mean free path at low frequencies and most of the heat is transported at frequencies such that the point de…
Abstract Farbige Cyanketone, die aus ω‐Chloracetyl‐trimethylmethylenindolinen mit Kaliumcyanid und Kondensation der so erhaltenen Cyanacetylderivate mit Aldehyden gewonnen werden, wurden spektralphotometrisch untersucht. Ihre Absorptionsspektren lassen sich durch Annahme innermolekular‐ionoider Grenzstrukturen deuten.…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRadiochemical Determination of Radium in Uranium Milling Process SamplesH. G. Petrow, O. A. Nietzel, and M. A. DeSesaCite this: Anal. Chem. 1960, 32, 8, 926–927Publication Date (Print):July 1, 1960Publication History Published online1 May 2002Published inissue 1 July 1960htt…