Materials Literature
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Abundances have been determined for Li in early F field dwarfs in order to determine the initial Li content for Population I stars. Reticon spectra were obtained at the coudé spectrograph of the CFH telescope of 75 F0 - F5 dwarfs with a spectral resolution of 0.11 Å. High S/N values allowed the observation of weak fea…
Close examination of published measurements of absolute configuration in inorganic crystals has revealed many mistakes, and only a small number of published correlations between optical rotation and chirality of crystal structure can be trusted. The sense of rotation of light is here traced to the hand of specific hel…
Abstract The morphology of illite/smectite (I/S) from deeply buried bentonites and hydrothermally altered Tertiary volcanic rocks from Japan changes in parallel with the proportion of expandable layers in the I/S. As viewed by scanning electron microscopy, the morphologies range from the typical “cornflake,” “maple le…
The electrical conductivities of carbon-black-filled low-density polyethylene (LDPE), poly(methyl methacrylate) (PMMA), and poly(vinyl chloride)-vinyl acetate (PVC/ VAc) copolymer were measured as functions of carbon content and melt viscosity of the matrix at the temperatures at which the composites were prepared. Sh…
Proline is accumulated in Escherichia coli via two active transport systems, proline porter I (PPI) and PPII. In our experiments, PPI was insensitive to catabolite repression and was reduced in activity twofold when bacteria were subjected to amino acid-limited growth. PPII, which has a lower affinity for proline than…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSite preferences and bond length differences in CaAl2Si2-type Zintl compoundsChong. Zheng, Roald. Hoffmann, Reinhard. Nesper, and Hans Georg. Von SchneringCite this: J. Am. Chem. Soc. 1986, 108, 8, 1876–1884Publication Date (Print):April 1, 1986Publication History Published…
Abstract The smectite to illite reaction was studied by transmission and analytical electron microscopy (TEM/AEM) in argillaceous sediments from depths of 1750, 2450, and 5500 m in a Gulf Coast well. Smectite was texturally characterized as having wavy 10- to 13-Å layers with a high density of edge-dislocations, and i…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXT"Second-sphere" photochemistry and photophysics of coordination compoundsVincenzo Balzani, Nanda Sabbatini, and Franco ScandolaCite this: Chem. Rev. 1986, 86, 2, 319–337Publication Date (Print):April 1, 1986Publication History Published online1 May 2002Published inissue 1 Ap…
The MNDO parameters for sulfur have been reoptimized. Calculations for a number of sulfur compounds indicate a very significant improvement. Inclusion of d AOs failed to correct the errors for compounds of sulfur in its higher valence states. Since d AOs are not included, the calculations are still confined to compoun…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHighly conducting charge-transfer compounds of tetrathiafulvalene and transition metal-"dmit" complexesMichele. Bousseau, Lydie. Valade, Jean Pierre. Legros, Patrick. Cassoux, Mary. Garbauskas, and Leonard V. InterranteCite this: J. Am. Chem. Soc. 1986, 108, 8, 1908–1916Publ…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTManganese(II) complexes of polydentate Schiff bases. 1. Synthesis, characterization, magnetic properties, and molecular structureBouchra Mabad, Patrick Cassoux, Jean Pierre Tuchagues, and David N. HendricksonCite this: Inorg. Chem. 1986, 25, 9, 1420–1431Publication Date (Pri…
In situ Raman spectroscopy and cyclic voltammetry have been used simultaneously to study anodic film growth and dissolution on Cu and Ag in strongly alkaline solution. On copper, Cu 2 O and another species, believed to be a hydroxide, were detected spectroscopically during anodic film formation. Raman spectra of elect…
Mechanical properties of aluminium polycrystals exhibiting differences in grain boundary (GB) properties have been studied by means of the Hall-Petch analysis. The results obtained indicate that the value of the stress intensity coefficient k depends on the distribution of GB diffusivity. High values of the diffusion…
Abstract Practical problems of the reproduction of the orientation distribution function (ODF) from pole figures (PFs) using discrete methods (with special attention paid to Imhof's method,) are analysed. A new variant of the iteration method for the determination of the ODF in arbitrarily defined size of cells in the…
Abstract Clays can act as osmotic membranes and thus give rise to osmotically induced hydrostatic pressures. The magnitude of generated osmotic pressures in geologic systems is governed by the theoretical osmotic pressure calculated solely from solution properties and by value of the membrane's three phe-nomenological…
Lattice parameter and density data were compiled for Y 2 O 3 ‐Stabilized ZrO 2 , both from the literature and from experimental measurements. The data are described very well over a wide range of composition by the model of Aleksandrov et al. , which assumes Y substitution for Zr in the unit cell with compensating ani…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHexasulfonated calix[6]arene derivatives: a new class of catalysts, surfactants, and host moleculesSeiji. Shinkai, Seiichi. Mori, Hiroshi. Koreishi, Takayuki. Tsubaki, and Osamu. ManabeCite this: J. Am. Chem. Soc. 1986, 108, 9, 2409–2416Publication Date (Print):April 1, 1986…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHigh-resolution aluminum-27 NMR of aluminosilicatesE. Lippmaa, A. Samoson, and M. MagiCite this: J. Am. Chem. Soc. 1986, 108, 8, 1730–1735Publication Date (Print):April 1, 1986Publication History Published online1 May 2002Published inissue 1 April 1986https://pubs.acs.org/do…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEpoxidation of olefins with cationic (salen)manganese(III) complexes. The modulation of catalytic activity by substituentsK. Srinivasan, P. Michaud, and Jay K. KochiCite this: J. Am. Chem. Soc. 1986, 108, 9, 2309–2320Publication Date (Print):April 1, 1986Publication History…
A low temperature thermal cleaning method for Si molecular beam epitaxy (MBE) is proposed. This method consists of wet chemical treatment to eliminate carbon contaminants on Si substrates, thin oxide film formation to protect the clean Si surface from contamination during processing before MBE growth, and desorption o…