Materials Literature
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The crystal structure of Pdl~Se15, with which Rhl~S15 (formerly alleged to be RhgSs) is isostructural, has been determined from single crystal data.The crystal belongs to one of the three space groups O~-Pm3m, T~-P-43m or O1-P432 with a lattice constant of 10"606 A and two PdlTSe15 per unit cell.It is shown that the X…
CrBr~ crystallizes in a monoclinic ~mit cell, space group C2/m, with a0--7.11~, b0--3.649, c0=6.21 ~ A; fl=93 53'.
In this work the uncrimping force and energy are used to characterize the crimp of wool fibers. These parameters are measured through the load-extension curves of single wool fibers. It seemed necessary to investigate the stability of the uncrimping energy and force. This stability is referred to as crimp recovery. Th…
Abstract The observed spectra of water of crystallization were compared with those of aluminum chloride hexahydrate and interpreted on the basis of the effects of aluminum-water coördination and hydrogen bonding O–H…O. The wagging and the rocking frequency were both much higher than is usual in water of crystallizatio…
Manager, Health Operation, Hanford Atomic Products Operation, Richland, Wash., operated by General Electric Company for the Atomic Energy Commission
The Zeeman-split quadrupolar resonances of ${\mathrm{Ba}}^{137}$ and ${\mathrm{Ba}}^{135}$ in barium bromide dihydrate were observed by using coincident enhancement of proton magnetic resonance as a detector. It was found that $\frac{{Q}_{137}}{{Q}_{135}}$ is 1.543\ifmmode\pm\else\textpm\fi{}0.003 and that the asymmet…
The variation of torsional rigidity of wool fibers with relative humidity is investi gated by dynamic methods at frequencies ranging from 115 to 0.00028 cycles/sec. Measurements are reported of the equilibrium values at various humidities and of the kinetics of change of rigidity as the humidity is altered. It was fou…
Abstract Many of the outstanding physical properties that characterize elastomeric Polyurethans have been realized in a soluble, thermoplastic variety, Polyurethan VC, which displays the superficial properties of a rubbery vulcanizate at room temperature and so is considered to be virtually crosslinked. High tensile s…
It is shown that Chamber's kinetic integral is an exact solution of the Boltzmann equation in the relaxation time approximation.Received 13 April 1962DOI:https://doi.org/10.1103/PhysRev.127.4©1962 American Physical Society
Abstract An experimental study is described of a “secondary” relaxation process in stretched vulcanizates, which becomes dominant after long periods at normal temperatures. It is shown to be affected markedly by the temperature, the atmosphere in which the test is conducted, and the presence of oxidation inhibitors. I…
The problem of the radiation embrittlement of structural steel and its relation to reactor pressure vessels is discussed. Clustered lattice defects produced by knock-on collisions from fast neutrons harden steel by a process analogous to precipitation hardening. It is shown that for the amount of hardening produced, t…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTHE PHOTOCHEMICAL EVOLUTION OF HYDROGEN FROM AQUEOUS SOLUTIONS OF FERROUS IONS. PART I. THE REACTION MECHANISM AT LOW pHJoshua Jortner and Gabriel SteinCite this: J. Phys. Chem. 1962, 66, 7, 1258–1264Publication Date (Print):July 1, 1962Publication History Published online1…
Infrared absorption measurements have been made on $p$-type PbTe at wavelengths ranging from 4 to 28 \ensuremath{\mu} and at temperatures ranging from 300 to 77\ifmmode^\circ\else\textdegree\fi{}K. Absorption by three different mechanisms was observed. At short wavelengths, the dominant absorption is caused by transit…
Since triglycine sulphate crystal is centrosymmetric above the Curie point, the piezoelectricity in the ferroelectric phase is expected to be an “induced” one as in the case of barium titanate, distinct from an “intrinsic” piezoelectricity of rochelle salt. Temperature dependences of piezoelectric constants are measur…
Abstract The effect of periodate followed by sodium borate treatment on the stabilities of prewet soil aggregates has been determined by a permeability technique and by wetsieving. The effect of periodate treatment depends on the history of the site, the depth, and the great soil group from which the sample is taken.…
Abstract The dynamical properties of tire yarns were investigated, the De Mattia method being used for compression fatigue and the Meskat‐Rosenberg‐Hoffmann instrument for the performance during an alternating tensile strength test. Various influences in the test of compression fatigue after De Mattia were investigate…
Oxygen and hydrogen have detrimental effects on the ductility of columbium and tantalum, particularly at subzero temperatures. Tantalum has a lower tolerance for oxygen than does columbium; however, the ductility of columbium containing oxygen is more temperature-sensitive than tantalum. Fracture modes change from she…
Abstract Antioxidant efficiency versus structure was investigated using rate of carbonyl formation at 110 and 170°C of a 20 mil plaque of polyethylene containing 0.01 weight % additive. This study indicates that the following are important in phenolic and amine antioxidants: The number of H. atoms available: Antioxida…
Constitutional studies of three polysaccharides prepared from Serratia marcescens cells by a sequence of phenol extraction, ultracentrifugation, and fractionation by Cetavlon are described. Methylation of the polysaccharides followed by acid hydrolysis yielded 2,3,4,6-tetra-O-methyl-D-glucose, 2,4,6-tri-O-methyl-D-glu…
Eigenschaften der Neutronenstrahlen, Aufbau eines Neutronenspektrometers. Untersuchung der Struktur des Zementits Fe 3 C, des Wolframkarbids WC und der Chromkarbide Cr 3 C 2 und Cr 23 C 6 . Vergleich der Ergebnisse mit den aus dem Schrifttum bekannten.