The photo-isomerization of some azobenzene derivatives
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Materials Literature
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A note on the crystal structure of Zeise's salt
SHORT COMMUNICATIONSshows a peak electron density of 44.0 e.Zk -s, of which 9.6 e.A -s is due to the extrapolated portion of the f-curve, and a central curvature of 2350 e..~ -5, half of which arises from the extrapolation.Work is proceeding on the low-temperature refinement of the other two zones in the hope of obtai…
Diffusion of Hydrogen and Deuterium in High Purity Zirconium
Kinetics of the reaction of zirconium with pure hydrogen and deuterium was studied for60°–250°C, H 2 pressures of 1.1–5.0 cm Hg, and composition range Zr ‐ ZrH 1.70 , using a vacuum microbalance method. The reaction was shown to be diffusion‐controlled with diffusion occurring from a surface of constant concentration…
Synthesis of cellulose by Acetobacter xylinum. 1. Micromethod for the determination of celluloses
1. A preparation of completely haemolysed erythrocytes from the blood ofdomestic fowls, which actively incorporates [Ox-14C]glycine into haem, is described.
ENVIRONMENTAL RELATIONS OF MODIFICATION COMPOSITIONS OF CERTAIN CARBONATE SECRETING MARINE INVERTEBRATES
Proceedings of the National Academy of Sciences (PNAS), a peer reviewed journal of the National Academy of Sciences (NAS) - an authoritative source of high-impact, original research that broadly spans the biological, physical, and social sciences.
Mechanism of Thiamine-catalyzed Reactions1
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMechanism of Thiamine-catalyzed Reactions1Shunzi Mizuhara and Philip HandlerCite this: J. Am. Chem. Soc. 1954, 76, 2, 571–573Publication Date (Print):January 1, 1954Publication History Published online1 May 2002Published inissue 1 January 1954https://pubs.acs.org/doi/10.1021…
Thermal and oxidative decomposition of polyvinyl chloride
Abstract An investigation into the kinetics and the mechanism of thermal and oxidative decomposition of polyvinyl chloride is reported. The rate of HCl evolution was measured in streams of nitrogen, air, and oxygen. The reaction is described as a chain reaction involving initiation (thermal and oxidative), propagation…
Intercalation and sorption by montmorillonite
R. M. Barrer and D. M. MacLeod, Trans. Faraday Soc., 1954, 50, 980 DOI: 10.1039/TF9545000980
Determination of Barrier Layer Thickness of Anodic Oxide Coatings
A novel method is described for measuring the thickness of a barrier type anodic oxide coating or the barrier layer portion of a porous type anodic oxide coating. This method is used to follow the evolution of the barrier layer during the early stages of the formation of a porous type coating on aluminum and to establ…
The behaviour of organic compounds in sulphuric acid
R. J. Gillespie and J. A. Leisten, Q. Rev. Chem. Soc., 1954, 8, 40 DOI: 10.1039/QR9540800040
Factors Affecting the Formation of Anodic Oxide Coatings
The effect of variations in electrolyte and forming conditions on the formation of porous type anodic oxide coatings on aluminum are discussed, with particular reference to the manner in which these variables control oxide formation, pore development, and the thickness of the barrier layer. Formation and solution rate…
Photochromism and reversible multiple internal transitions in some spiroPyrans at low temperatures. Part II
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5—THE STRUCTURE AND TENSILE PROPERTIES OF BRAIDS
Part I of the paper analyses in detail the structure of diamond braid, and its geometry is developed, based on assumptions similar to those of Peirce9. The difficulties of determining braid length which result from its unique structure are considered. In Part II, a practical method of testing tubular braids to find th…
A New Form of Uranium Hydride1
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA New Form of Uranium Hydride1R. N. R. Mulford, F. H. Ellinger, and W. H. ZachariasenCite this: J. Am. Chem. Soc. 1954, 76, 1, 297–298Publication Date (Print):January 1, 1954Publication History Published online1 May 2002Published inissue 1 January 1954https://pubs.acs.org/do…
Conductivity and Hall Effect of ZnO at Low Temperatures
The Hall effect and conductivity of zinc oxide have been measured in dense polycrystalline samples and two single crystals.It has been found that the usual simple Wilson semiconductor model is inadequate for the proper interpretation of results. Several modifications and additions have been suggested for the usual sin…
The crystal structure of TiB
The structure of titanium monoboride has been determined by single-crystal and powder methods to be of the FeB-type. The dimensions of the orthorhombic unit cell are ao = 6.12, b0 ----3.06 and co -~ 4.56/~. As in other borides of composition MB, the boron atoms form zigzag chains through the lattice. Short interatomic…
Studies of NaCl-KCl Solid Solutions. I. Heats of Formation, Lattice Spacings, Densities, Schottky Defects and Mutual Solubilities1,2
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStudies of NaCl-KCl Solid Solutions. I. Heats of Formation, Lattice Spacings, Densities, Schottky Defects and Mutual Solubilities1,2W. T. Barrett and W. E. WallaceCite this: J. Am. Chem. Soc. 1954, 76, 2, 366–369Publication Date (Print):January 1, 1954Publication History Pub…
The Anodic Oxidation of Magnesium Metal: Evidence for the Existence of Unipositive Magnesium1,2
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Anodic Oxidation of Magnesium Metal: Evidence for the Existence of Unipositive Magnesium1,2Roy L. Petty, Arthur W. Davidson, and Jacob KleinbergCite this: J. Am. Chem. Soc. 1954, 76, 2, 363–366Publication Date (Print):January 1, 1954Publication History Published online1…
L'approche à la saturation de la magnétostriction
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A general approach to hysteresis. Part 2: Development of the domain theory
D. H. Everett and F. W. Smith, Trans. Faraday Soc., 1954, 50, 187 DOI: 10.1039/TF9545000187