Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPorphyrin studies. XXXVII. The interpretation of porphyrin and metalloporphyrin spectraAlsoph H. Corwin, Arthur B. Chivvis, Robert W. Poor, David G. Whitten, and Earl Wayne BakerCite this: J. Am. Chem. Soc. 1968, 90, 24, 6577–6583Publication Date (Print):November 1, 1968Publ…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCrystal chemistry of the rare earth sesquisulfidesArthur W. Sleight and Charles T. PrewittCite this: Inorg. Chem. 1968, 7, 11, 2282–2288Publication Date (Print):November 1, 1968Publication History Published online1 May 2002Published inissue 1 November 1968https://pubs.acs.or…
Oliver E Nelson; THE WAXY LOCUS IN MAIZE. II. THE LOCATION OF THE CONTROLLING ELEMENT ALLELES, Genetics, Volume 60, Issue 3, 1 November 1968, Pages 507–524, htt
Abstract A leucine-binding protein isolated from Escherichia coli K12 has been purified by DEAE-cellulose and hydroxylapatite cellulose chromatography and its chemical and physical properties were determined. The purified protein was crystallized by adding 2-methyl-2,4-pentanediol. The crystalline protein was homogene…
Mixtures of PbO and silicic acid were fired at 710°, 820°, and 910°C for periods up to 1000 hr in air. At each temperature cristobalite and tridymite crystallized rapidly, with the greatest development in samples with compositions of 1 mole PbO to 50 and 60 moles SO 2 . At 820° and 91O°C tridymite continued to crystal…
Abstract The problem of preventing calcium sulfate scale deposition has become increasingly important in the last few years due to the increasing use of waterflood as a means of secondary recovery. Many methods have been proposed for removing or preventing scale deposition. A few chemicals and treatment methods have b…
Electron diffraction contrast experiments have been performed to crystallographically characterize the dislocation loops which form during 1100°C annealing of neutron-irradiated tungsten. These experiments show that the loops are essentially pure edge in orientation, lying on or near {111} habit planes and having a/2⟨…
The dielectric and infrared (lattice dynamic) properties of the cubic IV-VI compound semiconductors are reviewed. The values of macroscopic dynamic ionic charge are found to be appreciably larger than the corresponding values for alkali halide and zincblende type crystals. The large values of e(T)*, which arise from t…
Abstract It can be stated that the effect of carbon black in a rubber vulcanizate with regard to dynamic properties can be explained by assuming physical adsorption of rubber on the black surface. The effect can be represented by assuming an adsorbed layer having different properties from the bulk rubber taking the la…
Abstract The molecular weight dependence of the adsorption of polybutadiene on carbon black from a poor solvent, n-heptane, and bulk, i.e. , the phenomenon of “bound rubber”, was investigated. For narrow distribution polymers the adsorption is proportional to M n , where n = 0.14 for adsorption from n -heptane solutio…
Abstract Precise measurements of the solubility of sulphadiazine in water, dimethylformamide (DMF), and a range of mixtures of these solvents have been made at 20°, 30°, and 40°. The solubility of sulphadiazine in the mixtures increases with their DMF content. The partial molar heats and entropies of solution decrease…
Composites made up of MnBi needles embedded in bismuth single crystals are grown from eutectic melts by both Czochralski and zone-melting techniques. The galvanomagnetic properties of the composite are determined mainly by the bismuth matrix. Magnetic measurements reveal a magnetic phase with an anisotropy field of mo…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThermal decomposition of lithium aluminum hydrideMaclyn McCarty Jr., John N. Maycock, and V. R. Pai VernekerCite this: J. Phys. Chem. 1968, 72, 12, 4009–4014Publication Date (Print):November 1, 1968Publication History Published online1 May 2002Published inissue 1 November 19…
Abstract The theory of Cahn and Hilliard is used to derive an equation for the interfacial tension (free energy) between some demixed polymer solutions, applying a simple solution model treated by Debye in his theory of light scattering near the critical solution temperature. For a (symmetrical) system containing two…
Abstract Previously obtained dynamic shear modulus data over a wide amplitude range of rubber vulcanizates loaded with carbon blacks of widely varying structure as well as graphitized black were augmented with dynamic conductivity data at 30° C and at 100° C. Results confirm the existence of reversible transient and i…
The effects of certain variables on a-lactose crystallization were examined. The temperature for optimum crystallization rate varied with the initial supersaturation. Crystallization rate was not directly proportional to seed crystal surface area, probably because of false graining or because mutarotation has a limiti…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXT ADVANCES IN RHENIUM CATALYSTSWilliam H. Davenport, Valerie. Kollonitsch, and Charles H. KleinCite this: Ind. Eng. Chem. 1968, 60, 11, 10–19Publication Date (Print):November 1, 1968Publication History Published online1 May 2002Published inissue 1 November 1968https://pubs.ac…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTKinetics of the addition of hydridopentacyanocobaltate(III) to some .alpha.,.beta.-unsaturated compoundsJack Halpern and Lai-Yoong WongCite this: J. Am. Chem. Soc. 1968, 90, 24, 6665–6669Publication Date (Print):November 1, 1968Publication History Published online1 May 2002P…
The thermal expansion of structures with frameworks of linked octahedra may be broken up into two parts: the changes in shape and size of individual octahedra, and their changes of tilt relative to one another. Expansion due to the second cause, when allowed by symmetry, is generally much greater than expansion of the…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEffect of Ion Valency on the Bulk Physical Properties of Salts of Ethylene-Acrylic Acid CopolymersSergio Bonotto and Eugene F. BonnerCite this: Macromolecules 1968, 1, 6, 510–515Publication Date (Print):November 1, 1968Publication History Published online1 May 2002Published…