Der einfluss der verformungsgesohwindigkeit auf die struktur plastisoher keramisoher massen
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Energy of Cohesion, Compressibility, and the Potential Energy Functions of the Graphite System
The lattice summations of the potential energy of importance in the graphite system have been computed by direct summation assuming a Lennard-Jones 6–12 potential between carbon atoms. From these summations, potential energy curves were constructed for interactions between a carbon atom and a graphite monolayer, betwe…
Effect of Point Imperfections on the Electrical Properties of Copper. I. Conductivity
RRATA 1905 events to energetic neutron stars in the stack is large ( 1/10).Also the fiux of energetic neutrons at 90' to
Electron Characteristic Energy Losses in Metals and Compounds
The characteristic energy loss spectra of electrons in the metals Al, C, Sb, Ca, Pb, Na, and Te and compounds of these metals have been measured with an improved measuring technique designed to give more reliable intensity relationships, and it is found that, with the exception of ${\mathrm{Al}}_{2}$${\mathrm{O}}_{3}$…
Nature of Edge Emission in Cadmium Sulfide
Experimental and theoretical evidence is reviewed to determine if edge emission in CdS is due to exciton recombination or is characteristic of a center. New evidence is presented which shows that edge luminescence may be produced in CdS at low temperatures by stimulating with infrared light, and simultaneous measureme…
Triple Hysteresis Loops and the Free-Energy Function in the Vicinity of the 5°C Transition in BaTiO3
The effect of an electric field on the transition between the orthorhombic and tetragonal states in single crystals of BaTi${\mathrm{O}}_{3}$ has been investigated. With zero bias the tetragonal to orthorhombic transition occurs near 5\ifmmode^\circ\else\textdegree\fi{}C and the inverse transition at 11\ifmmode^\circ\…
Coulomb Scattering of Relativistic Electrons by Point Nuclei
The Mott series for the Coulomb scattering of electrons by point nuclei have been evaluated numerically with the aid of the UNIVAC computer. Calculations of the series for $F(\ensuremath{\theta})$ and $G(\ensuremath{\theta})$, the scattering cross section, and the polarization asymmetry factor, $S(\ensuremath{\theta})…
Bremsstrahlung and Pair Production in Condensed Media at High Energies
The effect of multiple scattering on bremsstrahlung and pair production is considered. The probability of these processes decreases considerably at energies \ensuremath{\gtrsim}${10}^{13}$ ev.The calculations are carried out with the aid of the density matrix. The formulas thus obtained yield the probability of pair p…
Relation between Weight-Lifting Totals and Body Weight
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X-ray induced conductivity in insulating materials
Abstract A co-ordinated explanation of the conductivity induced by ionizing radiation in solid insulating materials (conductivity ~ 10-20 Q-1 cm-1), including amber, mica and a number of plastics, is put forward for the first time. A model based on conduction by free electrons and including the presence of electron tr…
Effect of large hydrostatic pressures on the torsional fatigue strength of an alloy steel
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Calorimetric Determination of Heats of Formation of Titanium Chlorides
The heats of formation of TiCl4(l), TiCl3(s), and TiCl2(s) were determined by chlorinating Ti, TiCl3(s), and TiCl2(s), respectively, in a nickel-bomb calorimeter to give TiCl4(l). The directly measured heat of chlorination at 25° of Ti is —190.0±0.4, of TiCl3(s) is 20.9±0.1, and of TiCl2(s) is 69.9±0.8 kcal/mole—1. Re…
Viscosity of liquids
Abstract Three viscosity correlations were tested for liquids at their boiling points. Compounds studied included normal paraffins, branched‐chain hydrocarbons, aromatics, halogenated methanes and ethanes, water, and aliphatic alcohols. The correlations were tested for the most part with viscosity and thermodynamic da…
The Relationship between the Structural Geometry of a Textile Fabric and Its Physical Properties
A simplified nomograph has been designed to permit rapid solution of Peirce's geo metric relationships for plain weaves. To illustrate use of the nomograph, several practical problems in cloth structure are presented and worked out in some detail. Advantages and limitations of the nomograph are discussed.
Dielectric Properties of Wool-Water Systems. II. 26 000 Megacycles
The complex dielectric constant for wool-water systems has been determined at a frequency of 26 000 Mc by a cavity resonator method similar to the method employed at 3000 and 9300 Mc. At 26 000 Mc, measurements on single wool fibers and at relative humidities as high as 98% have proved feasible. The complex dielectric…
POLYPEPTIDES. X. CONFIGURATIONAL AND STEREOCHEMICAL EFFECTS IN THE AMINE-INITIATED POLYMERIZATION OF N-CARBOXYANHYDRIDES
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPOLYPEPTIDES. X. CONFIGURATIONAL AND STEREOCHEMICAL EFFECTS IN THE AMINE-INITIATED POLYMERIZATION OF N-CARBOXYANHYDRIDESPaul Doty and R. D. LundbergCite this: J. Am. Chem. Soc. 1956, 78, 18, 4810–4812Publication Date (Print):September 1, 1956Publication History Published onl…
Stress Corrosion in Titanium and Its Alloys
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStress Corrosion in Titanium and Its AlloysMars G. FontanaCite this: Ind. Eng. Chem. 1956, 48, 9, 59A–60APublication Date (Print):September 1, 1956Publication History Published online6 October 2008Published inissue 1 September 1956https://doi.org/10.1021/ie51400a008RIGHTS &…
Präzisionsbestimmung der Gitterkonstanten der ErdalkalisulfideMgS,CaS,SrSundBaS
Die Gitterkonstanten der Erdalkalisulfide wurden nach der asymmetrischen Methode für Pulveraufnahmen bestimmt. Die Eignung der verwendeten Kamera für Präzisionsmessungen ergab sich aus der Bestimmung der Gitterkonstanten von reinstem Gold. Die Messungen hatten folgendes Ergebnis: MgS : a = 5,1929 ± 0,0003 kX CaS : a =…
Studies of orientation phenomena in crystallizing polymers
Abstract Unusual orientation effects encountered during the formation of filaments of polyamides (nylon 6,6, 6,10, and 6 (polyhexamethylene adipamide, sebacamide, and polycaproamide)), polythene, and Terylene (polyethylene terephthalate) are described and discussed. The paper is divided into two parts: (I) extrusion,…
On the Formation of the Rhombohedral Graphite Modification
The stability relations between the hexagonal and rhombohedral graphite modification have been investigated using predominantly “single crystals”. Neglecting small amounts of stacking disorder natural graphite crystals have been found to consist usually of the pure hexagonal modification. However, several examples wer…