Materials Literature
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By representing f orbitals by cubic harmonics, overlap (or energy) integrals for f electrons have been calculated in terms of two-centre integrals. Results of s-f, p-f, d-f and f-f integrals are useful in making the tight-binding calculation as an interpolation method for substances with rare-earth or actinide element…
<div class="htmlview paragraph">The three-way catalyst system using a carburetor still needs a lot of improvement for meeting emission standards of U.S. for 1981, California for 1983, and Japanese for 1978. In order to improve air fuel ratio control capability of a carburetor three-way catalyst system, Toyota ha…
<div class="htmlview paragraph">A powder fed, microprocessor controlled plasma transferred arc (PTA) hard facing technique is described for facing valve seats. A comparison of this technique is made with the conventional oxy-acetylene flame welding process to show the differences in the metallurgical characteris…
The optimization of a heterogeneously catalyzed gas‐phase reaction by PE spectroscopy is demonstrated for the production of F 3 CBr, an extinguishing agent used in automatic fire extinguishing installations. A specially developed (PE spectroscopic) gas‐analysis technique permits screening of catalysts (and conditions)…
Abstract The reaction of cellulose phosphonate and N ‐vinyl‐2‐pyrrolidone in ethanol in the presence of sodium ethoxide was investigated and thermal stabilities and flame‐retardant properties for cellulose phosphonate modified with N ‐vinyl‐2‐pyrrolidone were discussed. The results in this study point out the followin…
Abstract An equilibrium isotherm on V‐S system at 900°C was determined by changing partial pressure of sulfur. Single crystals of several V 5 S 8 and V 2 S 3 compounds were grown by chemical transport. The grown crystals almost satisfied compositional relation on equilibrium isotherms between 900°C (hot zone) and lowe…
Thermal quenching of Li-doped CaO crystals annealed at temperatures in excess of 1400-K results in the formation of ${[\mathrm{Li}]}^{0}$ defects in the same manner as previously observed in Li-doped MgO crystals. These defects are lithium ions substituting for calcium and having a bound hole at a neighboring oxygen s…
A component, termed pyridinoline, has been reported to be derived from 'lysine aldehyde' (2,6-diaminohexanaldehyde) and designated as the stable cross-link of mature collagen. Commerically prepared collagen and freshly obtained mature bovine tendon collagen were both investigated with regard to their pyridinoline cont…
The luminescence of doped (Eu 3+ , Cr 3+ ) and undoped Al 2 ( WO 4 ) 3 , Sc 2 ( WO 4 ) 3 , and Lu 2 ( WO 4 ) 3 has been investigated. The tungstate luminescence is not very efficient for reasons closely related to the packing of the crystal structure, Sc 2 ( WO 4 ) 3 and Lu 2 ( WO 4 ) 3 are very hygroscopic. The Eu 3+…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTriboluminescence, single-crystal polarized absorption and photoluminescence, and high-pressure studies of linear-chain manganese(II) compoundsJeffrey I. Zink, Gordon E. Hardy, and Guenter GliemannCite this: Inorg. Chem. 1980, 19, 2, 488–492Publication Date (Print):February…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation Jean‐Louis Laurent, Paul A. Janmey, John D. Ferry; Dynamic Viscoelastic Properties of Gelatin Gel…
Spin-dependent (SD) phonon Raman scattering of Cd${\mathrm{Cr}}_{2}$${\mathrm{S}}_{4}$ is studied using a circularly polarized beam of a He-Ne (632.8-nm) laser in the Faraday configuration. It is found that magnetic-circular-polarization effects on the SD scattering are due to resonance with the "red-shifting" transit…
About 20% of xiphophorin fish (Xiphophorus maculatus) dermal melanophores which were cultured in monolayer for 5 to 10 days responded to light directly, exhibiting reversible melanosome aggregation within a few minutes. In order to determine the spectral sensitivity for the light-response, absorbance changes due to th…
Abstract Although the preparation of polycarbonates based on bisphenol A and 2,2‐bis(4‐hydroxyphenyl)‐1,1‐dichloroethylene was disclosed in 1964 by Porejko et al., little has been reported on their physical and flammability properties. To define the properties of this system these materials were prepared and evaluated…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTBoron halide clusters and radicals: synthesis and interconversions of the three oxidation states of a nine-boron polyhedronEdward H. Wong and Raifah M. KabbaniCite this: Inorg. Chem. 1980, 19, 2, 451–455Publication Date (Print):February 1, 1980Publication History Published o…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCrystal structure and magnetic properties of the cluster complex CuI8CuII6[SC(CH3)2CH2NH2]12Cl.3.5SO4.~20H2O, a mixed-valence copper-mercaptide speciesHarvey J. Schugar, Chia-Chih Ou, John A. Thich, Joseph A. Potenza, Timothy R. Felthouse, Muin S. Haddad, David N. Hendrickso…
Proton spin–lattice relaxation times T1 at 15 and 30 MHz, and relaxation times in the rotating frame T1ρ, have been measured over the temperature range 20–230 K for cyclohexane, cyclohexene, 1,3-cyclohexadiene, benzene, and substituted benzenes in glasses made of simple organic molecules. Results for different glass-f…
Abstract A procedure based on loss of weight after selective dissolution analysis (SDA) and washing with (NH 4 ) 2 CO 3 was developed for estimating the noncrystalline material content of soils derived from widely different parent materials. After extracting with 0.2 N ammonium-oxalate or boiling 0.5 N NaOH solutions,…
Abstract Polymorphism in nylon‐12 film, which appears on casting from a phenol‐ethanol solution, has been investigated by x‐ray diffraction and infrared absorption. The casting temperature was varied from 30 to 130°C and the ambient atmospheric pressure from 50 to 760 Torr. Casting at 30°C gives only the α form, while…
Anodic oxides on have been examined using x‐ray photoelectron spectroscopy (ESCA) combined with Ar‐ion etching. The ESCA spectra were analyzed using both analog, and in some cases digital techniques. Results showed the films to be composed of and . The composition at the surface of the films was found to be electrolyt…