Materials Literature
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Abstract Experiments are described in which the effect of the presence of foreign substances on the rate of crystallization of natural rubber at −26° C is examined. It is shown that small amounts of suitable impurities, some of which are present in smoked sheet and other plantation rubbers, accelerate the crystallizat…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHeat Capacities at Low Temperatures and Entropies at 298.16°K. of Aluminates and Ferrites of Lithium and SodiumE. G. KingCite this: J. Am. Chem. Soc. 1955, 77, 12, 3189–3190Publication Date (Print):June 1, 1955Publication History Published online1 May 2002Published inissue 1…
Abstract Data are presented on the fracture of inoculated-iron thin-wall tubes, investigated under various ratios of axial to tangential stress, ranging from pure tension to pure compression. These data are consistent with published data on gray cast iron. It may be assumed that in cast-iron, plates of friable graphit…
In this paper the formation of a gelatinous hydrate phase from the natural dicalcium silicate minerals larnite and bredigite is described. Detailed study of the gel so formed indicates that the process of hydration is a solid reaction which is effeeted by diffusion. The preferred orientation of the hydrate phase sugge…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNON-SOLVATED ALUMINUM HYDRIDE1George Chizinsky, Gordon G. Evans, Thomas R. P. Gibb Jr., and M. John Rice Jr.Cite this: J. Am. Chem. Soc. 1955, 77, 11, 3164–3165Publication Date (Print):June 1, 1955Publication History Published online1 May 2002Published inissue 1 June 1955htt…
The preparation of CaZrO 3 by solid‐state reactions at 1450° to 2000°C. is described. A very stable material was formed by the reaction of CaCO 3 and ZrO 2 , in equimolar proportions, at a final temperature of 1850°C. Lattice constant values for this material agreed with data reported by previous investigators. The li…
The chemical composition of a number of silk fibres of different origins, and of the Byssus fibre of Pinna nobilis, has been determined by chromatographic analysis. The proportion in the silks of amino acids with long side-chains to those with short side-chains, enables them to be placed into three main groups. These…
Abstract Additional polyvinylpyrrolidone samples of great homogeneity have been prepared, and their intrinsic viscosity and molecular weight (by light scattering) have been determined in water and chloroform. In view of the new results the previous data were reinterpreted particularly with respect to the shift in K (i…
Abstract Es wird die Phasenkontinuität und die Stabilisierung von Öl‐in‐Wasser‐ bzw. von Wasser‐in‐Öl‐Emulsionen durch Stoffe, die mehr in der öligen oder mehr in der wäßrigen Phase löslich sind, oder durch feste, unlösliche Stoffe, die entweder von der öligen oder von der wäßrigen Phase benetzt werden, besprochen. Un…
The Raman spectrum of furfural has been obtained photoelectrically in the liquid over a temperature range of 50° and in solution. The infrared spectrum has been obtained for the solid, the liquid (over a temperature range of 90°), and in dilute solution over a 50° temperature range. The vibrational spectrum is interpr…
1. The carbonic anhydrase inhibitors 2-benzothiazolesulfonamide (Cpd. I) and 2-acetylamino-1,3,4-thiadiazole-5-sulfonamide (Diamox) (Cpd. II) markedly reduced the rate of deposition of calcium in the shell of the oyster Crassostrea virginica. Treatment of oysters with Cpd. I, 1:80,000, for 7-8 hours reduced the rate t…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAn Investigation of the Size, Shape and Hydration of Serum Albumin by Small-angle X-Ray Scattering1John W. Anderegg, W. W. Beeman, Sidney Shulman, and Paul KaesbergCite this: J. Am. Chem. Soc. 1955, 77, 11, 2927–2937Publication Date (Print):June 1, 1955Publication History Pu…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPyrophosphate Formation Upon Ignition of Precipitated Basic Calcium Phosphates1Allen Gee and Victor R. DeitzCite this: J. Am. Chem. Soc. 1955, 77, 11, 2961–2965Publication Date (Print):June 1, 1955Publication History Published online1 May 2002Published inissue 1 June 1955htt…
Research Article| June 01 1955 Hypoglycin A and B, two biologically active polypeptides from Blighia sapida C. H. Hassall; C. H. Hassall 1Chemistry Department, University College of the West Indies, Mona, Jamaica, B.W.I. Search for other works by this author on: This Site PubMed Google Scholar K. Reyle K. Reyle 1Chemi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPeptides Isolated from a Partial Hydrolysate of Steer Hide Collagen. II. Evidence for the Prolyl-Hydroxyproline Linkage in CollagenThomas D. Kroner, William Tabroff, and John J. McGarrCite this: J. Am. Chem. Soc. 1955, 77, 12, 3356–3359Publication Date (Print):June 1, 1955Pu…
Using single‐crystal electron diffraction data it has been possible to demonstrate more directly the existence of considerable order in dehydroxylated kaolinite and halloysite. The two‐dimensional ( a‐b ) plane structure of dehydroxylated kaolinite is very similar to that of kaolinite. This phase, appropriately descri…
X-ray, differential thermal analysis, and dehydration methods have been used to study the magnesium oxychlorides 3Mg(OH)2.MgCl2.8H2O and 5Mg(OH)2.MgCl2.8H2O formed at temperatures below 100 °C, and 2Mg(OH), . MgCl2.5H2O and 9Mg(OH)2.MgCl2.6H2O formed at temperatures at and above 100 'C. Lower hydrates of the 3-form ex…
The reactions which take place in the system MgO-MgCl2-H2O at concentrations of MgCl2 solutions up to 45 per cent. and temperatures from 0 to 110 °C have been studied in detail. Four oxychlorides have been found, namely, 9Mg(OH)2.MgCl2.5H2O, 5Mg(OH)2.MgCl2.8H2O, 3Mg(OH)2.MgCl2.8H2O, and 2Mg(OH)2.MgCl2.4H2O ; and an eq…
The theory of inner pair production associated with the radiative capture of ${\ensuremath{\pi}}^{\ensuremath{-}}$ mesons and with the decay of the ${\ensuremath{\pi}}^{0}$ meson is discussed. Appropriate distribution functions are derived and compared with recently obtained experimental results. The weak dependence o…
Abstract An investigation on polymer spherulites is being described in three parts. Part I (the present paper) describes the various effects observed under the polarizing microscope. These are interpreted in terms of the concepts of crystal optics; the problem of the position of the molecules and that of the microscop…