Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and properties of tetraphenylporphyrin molecules containing heteroatoms other than nitrogen. 6. Electrochemical studiesAbraham Ulman, Joost Manassen, Felix Frolow, and Dov RabinovichCite this: Inorg. Chem. 1981, 20, 7, 1987–1990Publication Date (Print):July 1, 1981…
We have characterized the spectra, acidity constants and decay kinetics of the triplet and semireduced radical species of Safranin-O. Between pH 3.0 and pH 10.6 there are three triplet species denoted (3)DH2(+2), (3)DH(+) and (3)D, the pK(sub a)s being 7.5 and 9.2. All three triplet species exhibit first order decay,…
This paper presents an analysis of a copper torsion test specimen exhibiting a thermal softening instability at a high strain rate. A consititutive relationship derived from test data includes strain hardening, strain rate effects, and thermal softening. This relationship is used to numerically simulate the thermal so…
Using Landau theory, we show that the red shift of the primary Bragg reflection in cholesteric blue phases and the appearance of more than one cubic structure can be understood by including harmonics of the basic spatial frequency in the order parameter. A new nonsymmorphic bcc structure, having ${O}^{8}(I{4}_{1}32)$…
The growth of primary N-nitrosomethylurea-induced rat mammary tumors was depressed by cis-hydroxyproline (CHP). This growth arrest appeared to be related to the ability of CHP to inhibit the deposition of basement membrane collagen as based on the following observations: (a) in vitro and in vivo, tumor cells synthesiz…
The grain boundary composition of nickel base alloy 600 has been studied by means of Auger electron spectroscopy. After being cathodically charged with hydrogen in a water saturated salt bath at 200 C, all the specimens could be intergranularly fractured in the Auger chamber. Phosphorus was the only element found to s…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTResonance Raman spectra, excitation profiles, and infrared spectra of [N,N'-ethylenebis(salicylideniminato)]cobalt(II) in the solid stateM. Suzuki, T. Ishiguro, M. Kozuka, and K. NakamotoCite this: Inorg. Chem. 1981, 20, 7, 1993–1996Publication Date (Print):July 1, 1981Publi…
Abstract The compatibility and phase separation behavior of mixtures of the diglycidyl ether of bisphenol A and carboxyl‐terminated butadiene‐acrylonitrile copolymers were studied by means of light transmission, viscosity measurements, and optical microscopy. Cloud point measurements of the blends prior to curing show…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTBonding in Ni(PH3)2(C2H4) and Ni(PH3)2(C2H2). Ab initio SCF-MO studyKazuo Kitaura, Shigeyoshi Sakaki, and Keiji MorokumaCite this: Inorg. Chem. 1981, 20, 7, 2292–2297Publication Date (Print):July 1, 1981Publication History Published online1 May 2002Published inissue 1 July 1…
Low temperature visible spectra of Compounds I from peroxidases reconstituted with protohemin, 2-formyl-4-vinyldeuterohemin, 2-vinyl-4-formyldeuterohemin, 2,4-dimethyldeuterohemin, and 2,4-diacetyldeuterohemin reveal that these Fe(IV) porphyrin pi-cation radicals take the 2A2u of peroxidase-type electronic ground stat…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTReversible migration of an axial carbene ligand into an iron-nitrogen bond on a porphyrin. Implications for high oxidation states of heme enzymes and heme catabolismL. Latos-Grazynski, Ru-Jen Cheng, Gerd N. La Mar, and Alan L. BalchCite this: J. Am. Chem. Soc. 1981, 103, 14,…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPolymerization kinetics of rigid rodlike molecules: polycondensation of poly([benzo(1,2-d:5,4-d')bisoxazole-2,6-diyl]-1,4-phenylene)David B. Cotts and Guy C. BerryCite this: Macromolecules 1981, 14, 4, 930–934Publication Date (Print):July 1, 1981Publication History Published…
Age-related changes in human dermal elastic fibres were studied by scanning (SEM) and transmission (TEM) electron microscopy. The SEM findings showed an increase in the complexity of shape and arrangement of the fibres including flattening and branching, an increase in the roughness of the surface, and a decrease in i…
A photoelectrochemical method for etching p-GaAs is reported. The method overcomes the apparent stability of GaAs to reductive decomposition by switching the potential of the p-GaAs between a value at which photogenerated electrons reduce the surface to Ga and As3−, and a more positive value at which the majority carr…
The transformation on heating of an ordinary (helical) cholesteric liquid crystal (CHOL) into the isotropic phase (ISO) often occurs via a number of intermediate "blue" phases. We find the following scheme of phase transitions in cholesteryl nonanoate: $\mathrm{CHOL}\underset{91.35}{\ensuremath{\rightarrow}}\mathrm{BP…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHydrolytic polymerization of chromium(III). 1. Two dimeric speciesMary Thompson and Robert E. ConnickCite this: Inorg. Chem. 1981, 20, 7, 2279–2285Publication Date (Print):July 1, 1981Publication History Published online1 May 2002Published inissue 1 July 1981https://pubs.acs…
A planar magnetron with a zinc target is used to sputter zinc oxide in an oxygen atmosphere. Highly oriented zinc oxide films are obtained on a variety of subtrates such as gold, aluminum, platinum, quartz, and oxidized silicon. The sputtering rate is typically 10–20 μm/h for a substrate temperature of 450–500 °C, a s…
High‐density Si 3 N 4 +6% CeO 2 composites with 5 to 50% BN were fabricated by hot‐pressing. BN remained as a discrete phase. Dielectric constants were 4 to 8 and loss tangents were 0.0008 to 0.06 for the room temperature to 1100°C range for compositions with 10 to 50% BN. Thermal‐expansion values perpendicular to the…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCompatibility of polymer mixtures containing novolac resinsS. R. Fahrenholtz and T. K. KweiCite this: Macromolecules 1981, 14, 4, 1076–1079Publication Date (Print):July 1, 1981Publication History Published online1 May 2002Published inissue 1 July 1981https://pubs.acs.org/doi…
Abstract not Available.