The physical properties of some fluorine compounds and their solutions. Part 3.—Perfluorocyclohexane and perfluoromethylcyclohexane
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On the Differentiation of Vermiculites and Smectites in Clays
Certain of the criteria used for distinguishing vermiculites in clays from smectites are critically examined, and attention is drawn to the urgent need for further esearch in this field. Difficulties inherent in the differ-entiation are heightened by the common occurrence of interlayer con-tamination in the naturally…
On the Thermal Dissociation of Organic Compounds. XI. The Effects of the Substituents on the Thermal Dissociation of Urethans in Amine Solvent
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOn the Thermal Dissociation of Organic Compounds. XI. The Effects of the Substituents on the Thermal Dissociation of Urethans in Amine SolventTeruaki Mukaiyama and Masaru IwanamiCite this: J. Am. Chem. Soc. 1957, 79, 1, 73–76Publication Date (Print):January 1, 1957Publicatio…
Vibrational Spectra and Structure of Solid Sulfamic Acid and the Sulfamate Ion
The infrared spectra of finely powdered samples in pressed disks of KBr have been obtained for sulfamic acid, sodium and potassium sulfamates, and the corresponding deutero-compounds in the region from 4000 to 500 cm—1 at several temperatures. Satisfactory vibrational assignments could be made for the zwitterion model…
Stress Activated Luminescence in X-Irradiated Alkali Halide Crystals
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStress Activated Luminescence in X-Irradiated Alkali Halide CrystalsF. I. Metz, R. N. Schweiger, H. R. Leidler, and L. A. GirifalcoCite this: J. Phys. Chem. 1957, 61, 1, 86–89Publication Date (Print):January 1, 1957Publication History Published online1 May 2002Published inis…
Semiconducting Properties of Some Vanadate Glasses
Glasses have been made in the systems and with contents ranging between 50 and 87 mole%. The glasses were found to be semiconductors, those with the highest contents having a specific conductivity of the order of 10 −5 ohm −1 cm −1 at room temperature. The relationship between the specific conductivity, σ, and the tem…
Electron Deficient Compounds
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectron Deficient CompoundsR. E. RundleCite this: J. Phys. Chem. 1957, 61, 1, 45–50Publication Date (Print):January 1, 1957Publication History Published online1 May 2002Published inissue 1 January 1957https://pubs.acs.org/doi/10.1021/j150547a010https://doi.org/10.1021/j1505…
904. The 720 cm. –1 band in the infrared spectra of crystalline long-chain compounds
D. Chapman, J. Chem. Soc., 1957, 4489 DOI: 10.1039/JR9570004489
Photographic sensitivity
This paper reviews the experimental and theoretical work on photographic sensitivity and related topics which has been published during the past ten years. New experimental results, obtained to a large extent with model systems, have necessitated substantial revision and amplification of previously accepted theories.…
The thermal depolymerization of polystyrene. Part 1.—The reaction mechanism
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Microwave Resonance Relations in Anisotropic Single-Crystal Ferrites
The ferromagnetic resonance relations in magnetically anisotropic single-crystal ferrites have been re-examined. Detailed analyses are presented for spherical ferrite specimens possessing first order anisotropy. Generalized nomograms are presented which relate the microwave resonance frequency to the static magnetic f…
Anodic Oxidation of Aluminum, Chromium, Hafnium, Niobium, Tantalum, Titanium, Vanadium, and Zirconium at Very Low Current Densities
Some aspects of the mode of formation of anodic oxidation films in the potential region below oxygen evolution were examined for a number of metals under as nearly constant experimental conditions as possible. The metals selected were Al, Ti, Hf, V, Nb, Ta, and Cr. Results for Zr were reported in earlier publications.…
Preparation of Phthalic Acid Esters of Cellulose
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreparation of Phthalic Acid Esters of CelluloseC. J. Maim, J. W. Mench, Brazelton. Fulkerson, and G. D. HiattCite this: Ind. Eng. Chem. 1957, 49, 1, 84–88Publication Date (Print):January 1, 1957Publication History Published online1 May 2002Published inissue 1 January 1957ht…
Solution behavior of chemically synthesized polyglucoses
Abstract The solution behavior of polyglucoses prepared by the acid catalyzed polycondensation of Pacsu and Mora is discussed. According to this method glucose enters the polycondensation through the hemiacetal hydroxyl joining any of the other hydroxyls of a second glucose unit. Branching occurs up to the functionali…
213. Experiments on the synthesis of the pyrethrins. Part XII. cycloHexenone analogues of cinerone and pyrethrone
A. J. B. Edgar, S. H. Harper and M. A. Kazi, J. Chem. Soc., 1957, 1083 DOI: 10.1039/JR9570001083
Uranium-Aluminum Alloy Dissolution
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTUranium-Aluminum Alloy DissolutionR. G. Wymer and R. E. BlancoCite this: Ind. Eng. Chem. 1957, 49, 1, 59–61Publication Date (Print):January 1, 1957Publication History Published online1 May 2002Published inissue 1 January 1957https://pubs.acs.org/doi/10.1021/ie50565a026https:…
Valence in the Boron Hydrides
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTValence in the Boron HydridesWilliam N. LipscombCite this: J. Phys. Chem. 1957, 61, 1, 23–27Publication Date (Print):January 1, 1957Publication History Published online1 May 2002Published inissue 1 January 1957https://pubs.acs.org/doi/10.1021/j150547a005https://doi.org/10.10…
Dependence of the Ratio of Piezoelectric Coefficients on Density and Composition of Barium Titanate Ceramics
The ratio of piezoelectric coefficients $\ensuremath{-}\frac{{d}_{33}}{{d}_{31}}$ was found to decrease from about 2.5 for polarized barium titanate ceramic of high porosity to 2.2 for porosity near zero. The ratio increases up to 2.9 for ceramic with 2% porosity containing 12 weight% calcium titanate. For single crys…
The Systems CaF[sub 2]-LiF and CaF[sub 2]-LiF-MgF[sub 2]
Temperature‐composition relationships have been measured in the and the systems in the areas of liquidus temperatures below 1000°C. A binary eutectic composition of and was observed to melt at 769°C. A ternary eutectic composition of , , and was observed to melt at 672°C.
158. Infrared absorption bands associated with the NH group. Part I. Some secondary aromatic amines
D. Hadži and M. Škrbljak, J. Chem. Soc., 1957, 843 DOI: 10.1039/JR9570000843