Materials Literature
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Abstract Four phenyl‐substituted polyquinoxalines have been prepared by the reaction of combinations of two tetraamines, 3,3′‐diaminobenzidine and 3,3,′4,4′‐tetraaminodiphenyl ether, with two bisbenzils, 4,4′‐dibenzil and 4,4′‐oxydibenzil. The polymers were prepared by melt and solution polymerizations. Melt condensat…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHeteropoly blues. II. Reduction of 2:18-tungstatesMichael T. Pope and Elias PapaconstantinouCite this: Inorg. Chem. 1967, 6, 6, 1147–1152Publication Date (Print):June 1, 1967Publication History Published online1 May 2002Published inissue 1 June 1967https://doi.org/10.1021/ic…
A simple Monte Carlo procedure for simulating the scattering of electron beams with incident energies in the range 5-40 kev has been developed, based on a screened Rutherford cross section and the Bethe continuous energy-loss equation. Despite the approximate nature of the initial scattering data, the calculations agr…
Iron was deposited at room temperature in ultra-high vacuum (5 × 10−8 Torr) onto single-crystal films of copper oriented with (001) parallel to their plane. A shutter was moved between source and substrate so that iron deposits in which there were thickness gradients were obtained. Transmission electron micrographs an…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLigand field theory of p2,4 configurations and its application to the spectrum of Bi+ in molten salt mediaHarold Lloyd Davis, Niels J. Bjerrum, and George Pedro SmithCite this: Inorg. Chem. 1967, 6, 6, 1172–1178Publication Date (Print):June 1, 1967Publication History Publish…
Single suspension insulator units of several types as well as multi-unit strings were studied in a large refrigerated chamber. Rime ice of various densities was deposited on these insulators. The increase of leakage currents, the reduction of flashover voltages, and the alteration of voltage distributions along insula…
Cells in a -wild population of a species belonging to the diatom germs Mastogloia may form frustules of 2 strikingly different morphologic types during their vegetative life cycle. Total conversion from coarsely structured morphologic form to a more finely structured form takes place during a single division; hence no…
The antiferromagnetic structure of Mn 5 Si 3 at low temperatures (Néel point 68 °K) has been determined by neutron diffraction using single crystals. The magnetic structure is complicated, and the model proposed consists of a modulated non-collinear spin structure propagated through the crystal in three hexagonally re…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInfrared and nuclear magnetic resonance studies of some germanium phthalocyanines and hemiporphyrazinesJohn N. Esposito, Laurel E. Sutton, and Malcolm E. KenneyCite this: Inorg. Chem. 1967, 6, 6, 1116–1120Publication Date (Print):June 1, 1967Publication History Published onl…
In the orthorhombic modification of TeO 2 (tellurite) each tellurium atom is surrounded by four oxygen atoms at an average distance of 2.0 Å, similar to the tetragonal TeO 2 (paratellurite). The coordination polyhedron is a slightly distorted trigonal dipyramid, with both axial positions and only two of the three equa…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSpin equilibria in octahedral iron(II) poly((1-pyrazolyl)-boratesJ. P. Jesson, Swiatoslaw. Trofimenko, and Donald R. EatonCite this: J. Am. Chem. Soc. 1967, 89, 13, 3158–3164Publication Date (Print):June 1, 1967Publication History Published online1 May 2002Published inissue…
Phase relations were studied in the system ZrO 2 ‐MgO with emphasis on the range 1350° to 1600°C. A phase relation was determined from samples, using precision lattice parameters, X‐ray diffraction line intensities, and petrographic observations, and from dynamic observations of the phases present using high‐temperatu…
Abstract The stoichiometry, equilibrium, and kinetic properties of a terminal deoxynucleotidyltransferase isolated from calf thymus gland are described. The reaction catalyzed may be written dXTP + d(pY)m (Mg++)/→ d(pY)m(pX)n + nPPi and the ratio of polymer nucleotide to monomer at equilibrium (pH 7.0, 35°) is about 9…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe crystal and molecular structure of triclinic tetraphenylporphyrinStuart J. Silvers and Alexander. TulinskyCite this: J. Am. Chem. Soc. 1967, 89, 13, 3331–3337Publication Date (Print):June 1, 1967Publication History Published online1 May 2002Published inissue 1 June 1967h…
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