Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCarbon-13 Nuclear Magnetic Resonance Spectra of Olefins and Other HydrocarbonsR. A. Friedel and H. L. RetcofskyCite this: J. Am. Chem. Soc. 1963, 85, 9, 1300–1306Publication Date (Print):May 1, 1963Publication History Published online1 May 2002Published inissue 1 May 1963htt…
Randomly oriented fibers of either molybdenum or niobium were incorporated into hot‐pressed pellets of 10, 30, and 50 wt% UO 2 in ThO 2 to improve the thermal conductivity and the thermalshock resistance. Pellets 3/8 in. in diameter and about 3/8 in. long were irradiated in NaK capsules either bare or jacketed in Zirc…
SUMMARY Vitamin B12 is an essential nutrient for the flagellate Prymnesium parvum when growing in axenic culture and apparently can be replaced only by a few related ‘incomplete’ analogues, i.e. only those devoid of one or both benzimidazole-methyl groups; and, of the substituted analogues, some (e.g. the mono-acid, t…
Abstract The dynamic properties of a natural vulcanized rubber containing carbon black were studied for dynamic tensions of amplitude varying greatly. It was shown that both the elastic responses and viscosity change with amplitude of oscillation and with concentration and type of carbon black. The effects of thermal…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Structure of Copper TetraphenylporphineEverly B. FleischerCite this: J. Am. Chem. Soc. 1963, 85, 9, 1353–1354Publication Date (Print):May 1, 1963Publication History Published online1 May 2002Published inissue 1 May 1963https://pubs.acs.org/doi/10.1021/ja00892a032https://…
Lattice parameters and distribution coefficients for the Bi2Te3-Bi2Se3 pseudobinary alloy system have been determined for several compositions across the phase diagram. The c lattice constant (based on a hexagonal lattice) shows deviation from Vegard's law between 33% Bi2Se3 and pure Bi2Se3 with maximum deviation at 6…
Perovskites of the system SrFeO 3 ‐SrTiO 3 were prepared, and measurements were made of their magnetic and electrical behavior. Chemical analysis showed that the percentage of Fe 4+ varied from 72.5% for SrFeO 2.86 to about zero for Sr(Fe 0.1 Ti 0.9 )O 2.95 ; the remainder of the iron was in the Fe 3+ state and electr…
Abstract Soil factors which have been reported to affect lime requirement were measured on 26 Wisconsin Soils, and the importance of these factors in predicting lime requirement was determined by use of linear and multiple regression. The lime requirement was taken as the amount of < 200‐mesh dolomitic limestone ne…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreparation and Structures of Metal Cyanide-Lewis Acid Bridge CompoundsD. F. ShriverCite this: J. Am. Chem. Soc. 1963, 85, 10, 1405–1408Publication Date (Print):May 1, 1963Publication History Published online1 May 2002Published inissue 1 May 1963https://pubs.acs.org/doi/10.1…
Abstract A polybenzimidazole has been prepared from 3,3′‐diaminobenzidine and phthalic anhydride which has a high molecular weight and very good heat stability. Replacement of the hydrogen atoms on the nitrogen of the imidazole nuclei in a polybenzimidazole does not improve the heat stability as indicated by the prope…
fl-Pu is monoclinic body-centered with 34 atoms per unit cell. At 190 C a=9.284, b=10.463, c=7.859/~, fl=92.13 and the density is 17.70 g.cm. -3.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFertilizer Materials, Preparation and Characterization of Some Calcium PyrophosphatesE. H. Brown, J. R. Lehr, J. P. Smith, and A. W. FrazierCite this: J. Agric. Food Chem. 1963, 11, 3, 214–222Publication Date (Print):May 1, 1963Publication History Published online1 May 2002P…
Abstract Wakelin's method of correlation analysis of x‐ray diffraction patterns was adapted for fibers, films, and polymer samples of poly(ethylene terephthalate). This method gives a number called a crystallinity index, which is a measure of how far an unknown sample is between the extremes of the most amorphous and…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Metal-Metal Bonded, Polynuclear Complex Anion in CsReCl4J. A. Bertrand, F. A. Cotton, and W. A. DollaseCite this: J. Am. Chem. Soc. 1963, 85, 9, 1349–1350Publication Date (Print):May 1, 1963Publication History Published online1 May 2002Published inissue 1 May 1963https:/…
Abstract Sheets of isotactic polypropylene were prepared to have initially random orientation and were subsequently rolled at temperatures below the crystalline melting point. Their crystal orientation was investigated. The orientation of the c axis (fiber axis) was determined from pole figure data obtained by x‐ray d…
The effects of additions of La 2 O 3 and La 2 O 3 ‐3TiO 2 on the electronic properties of barium titanate have been investigated. It has been found that small additions of these components markedly increase the lifetime of this material subjected to dc fields of 50 v per mil at 200°C.
Dielectric measurements, analyzed in terms of the Maxwell‐Wagner‐Sillars theories of inhomogeneous dielectrics, have been used to investigate the phase‐separation characteristics of various lithium silicate glasses. Such measurements are shown to provide evidence of the continuous or discontinuous nature of separated…
Measurements of the magnetoelectric effect on ${\mathrm{Cr}}_{2}$${\mathrm{O}}_{3}$ powders, after magnetoelectric annealing are described. The experimental results are compared with theoretically derived relations between the magnetoelectric effect in single crystals and powders. Reasonable agreement is found.
The crystal structure of sillimanite, Al2SiO5, has been refined as part of a detailed structural study of the aluminum-silicate minerals. Three-dimensional least-squares refinement reduced the disagreement factor, R, for 347 hkl reflections to 5.6%.
The vacuum-ultraviolet reflectance of freshly evaporated aluminum films has been measured as a function of time in vacuum after the deposition. The pressure in the experimental chamber during the measurements ranged from 4 × 10−6 mm Hg at the time of the deposition to an ultimate pressure of 2 × 10−7 mm Hg. The first…