Materials Literature
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The diurnal migratory rhythm of the epipelic diatom association of freshwater streams has been investigated in laboratory studies. Movement of the diatom flora up to the surface of the sediment and down beneath the surface occurs once every 24 hours reaching a peak of cell numbers at the surface at approximately the s…
Crystal field theory developed by Abragam and Pryce has been used to formulate the anisotropic exchange interactions in CoCl 2 ·2H 2 O and CoBr 2 ·2H 2 O. These crystals are antiferromagnets in which Co ++ ions form ferromagnetic linear chains coupling antiferromagnetically to adjacent chains. There are two abrupt jum…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDielectric Dispersion of Crystalline Powders of Amino Acids, Peptides, and Proteins1S. Takashima and H. P. SchwanCite this: J. Phys. Chem. 1965, 69, 12, 4176–4182Publication Date (Print):December 1, 1965Publication History Published online1 May 2002Published inissue 1 Decemb…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAnalysis of Glass and Ceramic Frit by Atomic Absorption SpectrophotometryAntrim H. JonesCite this: Anal. Chem. 1965, 37, 13, 1761–1762Publication Date (Print):December 1, 1965Publication History Published online1 May 2002Published inissue 1 December 1965https://pubs.acs.org/…
Abstract A study of the growth of needle crystals of monosodium urate was undertaken with the aim of finding inhibitors which might be able to prevent the acute gout attack. Rates of crystal growth at various levels of supersaturation are described. Two potent crystal growth inhibitors, Bismarck brown and methylene bl…
Abstract Differential thermal analysis was used to study the effect of a diluent, glycerol, and copolymer units, acetate groups, on the melting point of poly(vinyl alcohol) (PVA). The melting point of PVA was found to be 228°C. and the heat of fusion by the diluent and copolymer methods was 1.64 and 0.56 kcal./mole, r…
X-ray photographs of (Ca, Na)CO 3 cancrinites show diffuse satellites with the indices ( h k l ± 3/7), The examined crystals from Litchfield, U.S.A., have the space group P 6 3 and the lattice dimensions a = 12.75 Å and c = 5.14 Å. The crystal structure has been determined–independently of all previous structure assum…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCharacterization of a Collagen from Codfish Skin Containing Three Chromatographically Different α Chains*Karl A. PiezCite this: Biochemistry 1965, 4, 12, 2590–2596Publication Date (Print):December 1, 1965Publication History Published online1 May 2002Published inissue 1 Decem…
Abstract Shortly, lightweight, inexpensive, precision, space‐filling atomic models particularly suitable for constructing macromolecules of biological interest will reach the scientific community. The availability of the models, the Corey‐Pauling‐Koltun, or C‐P‐K Models, will conclude a five‐year program which has inv…
Ceramic and electrical properties and crystal structures of the system Pb(Mg l/3 Nb 2/3 ‐ PbTiO 3 ‐PbZrO 3 are described. The system is composed of three crystal phases at room temperature: pseudocubic, tetragonal, and rhombohedral. A high dielectric constant and radial coupling coefficient and low resonant resistance…
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Dissociation Energy of the Tetrasulfide LinkageI. Kende, T. L. Pickering, and A. V. TobolskyCite this: J. Am. Chem. Soc. 1965, 87, 24, 5582–5586Publication Date (Print):December 1, 1965Publication History Published online1 May 2002Published inissue 1 December 1965https:/…
Extensive and accurate viscosity values for molten B 2 O 3 are reported over the continuous range from 20 poises (at 1400°C) to 10 10 poises (at 318°C). The measurements were made with a wide‐range rotating‐cylinder viscometer. The melts were pretreated by bubbling superdry nitrogen through them to ensure a minimum wa…
The symmetry properties of the third-rank tensor β which comprises the set of coefficients of quadratic terms in the expansion of the induced-dipole moment in the electric field are investigated, and the various linear combinations belonging to the irreducible representations are tabulated for the important molecular…