Materials Literature
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The excited-state absorption cross section\sigma_{2a}(E)in the gain wavelength region of alexandrite has been determined and is shown to limit the vibronic laser range at both high and low energy. The maximum in vibronic laser emission is due to a minimum in\sigma_{2a}(E)near 13 000 cm-1.\sigma_{2a}(E)is less than 10-…
True magnetoplumbite structures, e.g. Na l/2 La l/2 Al 1/2 O 19 , differ significantly from β‐alumina structures in leach resistance and thermal stability against volatilization. Na, K, Rb, and Cs can be safely immobilized in magnetoplumbite structures.
Abstract Reduction of carbon dioxide at p-type GaP photocathodes was investigated in lithium carbonate electrolytes. The reduction occurs in competition with hydrogen evolution and its current efficiency is enhanced by dissolving crown ether such as 15-crown-5 in the electrolyte. It is proposed that a chemical reactio…
A method for the characterization of coincidence cells is proposed for hexagonal crystals. It is based on a simple formulation of the orientation relationships for coincidence site lattices. Therefore tables of coincidence orientation are established for different axial ratios with rational values of (c/a)2. Possible…
Enzymes are often immobilized on the internal surfaces of porous solid by immersing enzyme-free particles in a well mixed solution of enzyme. The ensuing impregnation process involves coupled transient mass transfer and surface attachment of enzyme. A mathematical model is employed to explore the influences of process…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTUltradrawing at room temperature of high molecular weight polyethyleneMasaru Matsuo and R. St. John ManleyCite this: Macromolecules 1982, 15, 4, 985–987Publication Date (Print):July 1, 1982Publication History Published online1 May 2002Published inissue 1 July 1982https://pub…
A simplified procedure for the fractionation and purification of different collagen types from various tissues is described which is particularly efficient in separating type-V from type-IV collagen, and high-mol.-wt. (HMW) aggregates from 7 S collagen. Uterus and maternal villi contain 2 forms of type-V collagen - [a…
A new silicon-on-insulator (SOI) structure has been achieved by utilizing silicon molecular beam epitaxial (Si-MBE) growth on porous silicon, silicon island patterning, and the subsequent laterally enhanced oxidation of the porous silicon. The surface of Si-MBE film grown on porous silicon at 770 °C without high-tempe…
The gravimetric method was used to study the reaction between fused silica and silicate glasses with HF acid solution. The reaction was found to be transport‐controlled. Additions of Al 2 O 3 , CaO, or both to fused silica caused a reduction in corrosion resistance of the resulting glasses.
The infrared spectral characteristics of N-(2-hydroxybenzylidene)aniline, its deuterium substituted analogue, N-(2-hydroxybenzylidene)-m-toluidine, and their photoproducts have been investigated. The infrared spectrum of a low temperature polycrystalline film of N-(2-hydroxybenzylidene)aniline exhibits new absorption…
The equation derived by G. F. Dionne [J. Appl. Phys. 44, 5361 (1973)], has been used as a basis for the present analysis. Escape probability has been determined for various insulators and semiconductors. The relative importance of the emission and production terms has been discussed in various energy gap-width regions…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Cite Icon Cite Search Site Citation V. A. Shershnev; Vulcanization of Polydiene and other Hydrocarbon Elastomers. Rubber Chemistry and Technol…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMetal oxide-support interactions in silica-supported iron oxide catalysts probed by nitric oxide adsorptionS. Yuen, J. E. Kubsh, J. A. Dumesic, N. Topsoee, H. Topsoee, and Y. ChenCite this: J. Phys. Chem. 1982, 86, 15, 3022–3032Publication Date (Print):July 1, 1982Publicatio…
The interaction of hydrogen with the diamond (111) surface is examined using our new results in photoemission spectroscopy (PES) and photon-stimulated ion desorption (PSID) yield at photon energies near the carbon K edge. Also discussed in the light of our new results are previous studies using PES and low energy elec…
The protein A-gold (pAg) complex, a useful reagent for electron microscopic localization of antigens in thin sections, is tested for its suitability as second step reagent in light microscopic immunohistochemistry. In addition, the preparation of colloidal silver, its complex formation with staphylococcal protein A an…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPerpendicular and parallel acetylene complexesDavid M. Hoffman, Roald Hoffmann, and C. Richard FiselCite this: J. Am. Chem. Soc. 1982, 104, 14, 3858–3875Publication Date (Print):July 1, 1982Publication History Published online1 May 2002Published inissue 1 July 1982https://pu…
Amorphous semiconductors and insulators display the phenomenon of dispersive transport: the average mobility of the carriers decreases with time after pulsed excitation. A simple model explains how multiple trapping (MT) in a continuous distribution of localized states gives rise to dispersion. This model is then used…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFlammability properties of acrylonitrile and acetonitrileSilvio De Micheli and Vittorio TartariCite this: J. Chem. Eng. Data 1982, 27, 3, 273–275Publication Date (Print):July 1, 1982Publication History Published online1 May 2002Published inissue 1 July 1982https://pubs.acs.o…
The sudden change of moisture and/or temperature on a solid can significantly disturb the resulting stresses and strains and cause material damage. This investigation is concerned with the sudden rise (or drop) of temperature over a finite segment of a half-space that is free of tractions. The mutual dependence of moi…
Infrared and Raman spectroscopy were used to study the oxidation of Fe3O4 on surfaces of weathering steel, carbon steel, and pure iron. Two sets of samples were polished and coated with an Fe3O4 paste. One set was moistened daily with distilled water and allowed to freely dry in air. The second set was treated in a si…