Materials Literature
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Anodized thin film samples of single phase nickel 13 w/o (weight percent) molybdenum have been analyzed by scanning transmission electron microscopy using a variety of examination modes. It is established that the anodic film comprises a fine mosaic of almost epitaxial crystalline nickel oxide particles of 3 nm diamet…
Abstract With particular reference to the use of Na2HPO4 as nucleation catalyst for crystallization of CH3CO2Na·3H2O, influences of preheating temperature and time were studied on the crystallization of CH3CO2Na·3H2O from three kinds of CH3CO2Na aqueous solutions, whose concentrations were 58.0, 60.3, and 62.8 wt%. In…
The mechanical behaviour of one or both shell valves of five species of pectinacean and one anomiacean was determined using strain gauge rosettes attached to the inner surfaces of the valves. A multiple linear regression analysis accounted for over 64% of the total vanance in tensile shell compliance. The important sh…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMetallotetraphenylporphyrin-catalyzed oxidation of 2,6-di-tert-butylphenolXian Yuan Wang, Ramunas J. Motekaitis, and Arthur E. MartellCite this: Inorg. Chem. 1984, 23, 3, 271–275Publication Date (Print):February 1, 1984Publication History Published online1 May 2002Published…
Bowman's membrane, seen as a homogeneous layer in light microscopy, is demonstrated by transmission electron microscopy as a layer with fibrils in random distribution, for which reason the term used at present is Bowman's layer. Frozen resin cracking demonstrates that the fibrils of the layer run in certain patterns a…
Systematic variations in sericite composition are present in each of the areas studied. In the Roosevelt geothermal system, Si increases and tetrahedral Al decreases with increasing depth in the system. Sericites from Southwest Tintic increase in Si and decrease in interlayer cations from biotite through quartz-serici…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTKinetics of ammonia-nitric oxide reactions on vanadium oxide catalystsMilton Farber and Sigmund P. HarrisCite this: J. Phys. Chem. 1984, 88, 4, 680–682Publication Date (Print):February 1, 1984Publication History Published online1 May 2002Published inissue 1 February 1984http…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe photoreversible oxidative-addition, reductive-elimination reactions iron + molecular hydrogen .dblharw. iron hydride (FeH2) in low-temperature matrixesGeoffrey A. Ozin and John G. McCaffreyCite this: J. Phys. Chem. 1984, 88, 4, 645–648Publication Date (Print):February 1,…
A method for spectroscopically detecting interstellar graphite grains is proposed. If pure crystalline graphite grains constitute an appreciable portion of the interstellar grain mixture, they will produce a spectral feature at 11.52 microns which may be detected in either emission or absorption along suitable lines o…
In the laboratory the planulae of Cyanea are exposed to a choice of substrates. Their behavior, the length of time required for them to attach, and the size they attain after attachment differs between glass (hydrophilic) and plastic (hydrophobic) surfaces. The correlation of these differences with wettability is show…
Abstract Single‐crystal x‐ray diffraction analysis is performed on a model compound (bisurethane of diphenylmethane‐4–monoisocyanate and butanediol‐1,4) for the thermoplastic polyurethane (TPU) hard segment formed from diphenylmethane‐4,4′‐diisocyanate and butanediol‐1,4. The resulting structure is compared to structu…
Abstract The nuclear cobalt(II) ion in heptamethyl cobyrinate iodide, Cob(II)ester·I, was found to assume a distorted square-planar geometry of Co–N4 type with iodide as a counterion in a polar solvent (methanol) and a square-pyramidal one of Co–N4I type with the iodide ion coordinated at one of the axial positions in…
The temperature dependence of Young's modulus and internal friction (Q −1 )in alumina, silicon nitride, and partially stabilized zirconia (Y‐PSZ) ceramics was studied. Little change in Q −1 was found for alumina, whereas Q −1 for silicon nitride ceramics increased above 700°C. The Q −1 of Y‐PSZ increased markedly with…
The extrapallial fluid (EPF), the fluid component of the shell-forming system of molluscs, has been examined for its effect on the rate of CaCO3 crystal formation in vitro. The medium was an artificial inorganic extrapallial fluid supersaturated with respect to CaCO3. EPF of the bivalves Crassostrea virginica and Merc…
A model is proposed for the geometrical structure of graphitic carbon chemisorbed on a Ni(110) single crystal which reproduces with good accuracy the experimental radial distribution function $F(R)$ obtained for the first time by surface extended energy-loss fine-structure spectroscopy. The graphitic layer strongly in…
Strain SF22, a glutamine-requiring (Gln-) mutant of Bacillus subtilis SMY, is likely to have a mutation in the structural gene for glutamine synthetase, since this strain synthesized 22 to 55% as much glutamine synthetase antigen as did wild-type cells in a 10-min period but had less than 3% of wild-type glutamine syn…
The corrosion of copper in neutral and acidic chloride solutions containing dissolved oxygen has been investigated by transient polarization techniques. Mathematical models have been developed to Interpret the current transients of copper due to potential variations. These models compare favorably with experimental re…
The strong tendency of the porphyrin framework to form permitted synthesis of the title compound 1 by successive reaction of biphenylenedicarbaldehyde with pyrrole and dipyrrylmethane derivatives. 1 forms a dicopper(II) complex with, as yet, unexplained properties.
Abstract The temperature, strain‐rate, and pressure dependences of the yield stress have been determined for two polyethylene homopolymers of differing molecular weights and for a polyethylene copolymer. Samples were prepared by slowly cooling from the melt, and also by quenching in order to assess the effects of morp…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSpin-state differences and spin crossover in five-coordinate Lewis base adducts of cobalt(II) Schiff base complexes. Structure of the high-spin (N,N'-o-phenylenebis(salicylaldiminato))cobalt(II)-2-methylimidazole adductBrendan J. Kennedy, Gary D. Fallon, Bryan M. K. C. Gateh…