Conductance mechanisms in crystals containing hydrogen bonds
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Reaction of Hydrogen with Uranium
The reaction of hydrogen with uranium to produce uranium hydride was studied in the temperature range 96°–400°C at pressure levels of of mercury (where is system pressure and is the plateau dissociation pressure of the uranium hydride product). Reaction rates followed the linear law. At a given , the linear rate incre…
Das Auflösungsvermögen des Feldionenmikroskopes
Eine Betrachtung des Auflösungsvermögens des Feldemissionsmikroskopes läßt den Betrieb mit Ionen an Stelle von Elektronen als vorteilhaft erscheinen. Einige Daten der Felddesorption und der Feldionenemission werden mitgeteilt und der Mechanismus dieser Effekte wird erläutert. Daraus ergibt sich eine Beziehung für das…
Structure and magnetic properties of Co3O4 and ZnCo2O4
Abstract Measurements are described of the paramagnetic susceptibilities of Co 3 O 4 , ZnCo 2 O 4 , and mixed crystals of ZnAl 2 O 4 ‐ZnCo 2 O 4 and the results are given in a table of X ‐values and two plots of 1/ X against absolute temperature. To explain the very low value of the mean Bohr magneton number, found fo…
Relation of Available Potassium to Soil Moisture
Abstract Preliminary studies revealed that exchangeable K levels in Iowa soils fluctuated in response to vapor pressure changes and air drying. This phenomenon was investigated in relation to (1) K nutrition of plants in the greenhouse and (2) the problem of predicting the relative K‐fertility status in a wide range o…
Mastication. Part III. Chemical verification of the mechanical degradation mechanism of cold mastication
Abstract The mechanism of cold mastication of natural and synthetic rubbers, as proposed by Kauzmann and Eyring, and by Pike and Watson, in volves the mechanical rupture of the polymer chain yielding polymer radicals which are stabilized by interaction with radical‐acceptor molecules to give the degraded polymer. This…
Microwave lens matching by simulated quarter-wave transformers
The reflections from the surface of a dielectric lens may be cancelled by a quarter-wavelength layer of refractive index intermediate between that of air and the lens medium. The possibility of simulating a quarter-wave matching section by perturbing the boundary of the lens is described in this paper. Some of the con…
Inhibition of polymerization. II. Methyl acrylate
Abstract The effect of nine inhibitors on the 2,2′‐azobisisobutyronitrile initiated polymerization of methyl acrylate in methyl propionate solution has been studied kinetically by a dilatometric method. The rate constants obtained are compared with those found for these same compounds in methyl methacrylate polymeriza…
Magnetic and Electrical Properties of Manganese Telluride
The temperature dependence of the susceptibility of the antiferromagnetic compound MnTe was measured over a range of temperature between liquid nitrogen temperature and 720°C. An abrupt change in slope and a maximum of the susceptibility curve were found at 37°C and at 55°C respectively. These results are compared wit…
Self-diffusion in mixtures. Part 1. Theory and its application to a nearly ideal binary liquid mixture
P. C. Carman and L. H. Stein, Trans. Faraday Soc., 1956, 52, 619 DOI: 10.1039/TF9565200619
High polymer solutions. Part 8.—The vapour pressure of solutions of polyisobutene in toluene and cyclohexane
The first page of this article is displayed as the abstract.
VII. A thermodynamic treatment of ferroelectricity and antiferroelectricity in pseudo-cubic dielectrics
The Kittel-Devonshire phenomenological treatment of antiferroelectricity is extended to the case of polarizations in three dimensions in a pseudo-cubic material. There are ten possible solutions of the proposed free energy equation, corresponding to non-polar, ferroelectric, antiferroelectric and ferrielectric states,…
The Stability of the Rare Earth Complexes with N-Hydroxyethylethylenediaminetriacetic Acid
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Stability of the Rare Earth Complexes with N-Hydroxyethylethylenediaminetriacetic AcidF. H. Spedding, J. E. Powell, and E. J. WheelwrightCite this: J. Am. Chem. Soc. 1956, 78, 1, 34–37Publication Date (Print):January 1, 1956Publication History Published online1 May 2002P…
POLYPEPTIDES. VI. POLY-α-L-GLUTAMIC ACID: PREPARATION AND HELIX-COIL CONVERSIONS1
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPOLYPEPTIDES. VI. POLY-α-L-GLUTAMIC ACID: PREPARATION AND HELIX-COIL CONVERSIONS1E. R. Blout and M. IdelsonCite this: J. Am. Chem. Soc. 1956, 78, 2, 497–498Publication Date (Print):January 1, 1956Publication History Published online1 May 2002Published inissue 1 January 1956h…
A Microstructure Study of Barium Titanate Ceramics
Polishing and etching techniques suitable for the metallographic examination of polycrystalline barium titanate ceramics are described. Interpretation of the photomicrographs reveals information which may be correlated with the electromechanical properties.
Diffused Emitter and Base Silicon Transistors*
Silicon n-p-n transistors have been made in which the base and emitter regions were produced by diffusing impurities from the vapor phase. Transistors with base layers 3.8 × 10−4-cm thick have been made. The diffusion techniques and the processes for making electrical contact to the structures are described. The elect…
The sorption and desorption kinetics of water in a regenerated cellulose
A. C. Newns, Trans. Faraday Soc., 1956, 52, 1533 DOI: 10.1039/TF9565201533
Oxygen-Containing Groups on the Surface of Carbon Black
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOxygen-Containing Groups on the Surface of Carbon BlackMerton L. Studebaker, E. W. D. Huffman, A. C. Wolfe, and L. G. NaborsCite this: Ind. Eng. Chem. 1956, 48, 1, 162–166Publication Date (Print):January 1, 1956Publication History Published online1 May 2002Published inissue…
Synthesen in der Carotinoid‐Reihe. 1. Mitteilung. Die technische Synthese von β‐Carotin
Abstract The industrial β‐carotene manufacturing procedure based on Inhoffen's synthesis C 19 + C 2 + C 19 = C 40 is described. β‐Ionone is first lengthened to β‐C 14 ‐aldehyde as in our vitamin A‐synthesis. By acetalisation, condensation with vinyl ether and treatment with acid the new β‐C 16 ‐aldehyde is obtained. R…
THE EFFECT OF GROWTH CONDITIONS UPON THE SOLIDIFICATION OF A BINARY ALLOY
This investigation provides both a theoretical and an experimental analysis of the factors which affect the mode of solidification of a binary alloy. These factors are: (i) the concentration of solute in the melt (C 0 ); (ii) the rate of solidification (R); (iii) the temperature gradient in the melt at the solid–liqui…