Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCatalyst preparation procedure probed by EXAFS spectroscopy. 2. Cobalt on titaniaKazuyuki Tohji, Yasuo Udagawa, Shuji Tanabe, Takashi Ida, and Akifumi UenoCite this: J. Am. Chem. Soc. 1984, 106, 18, 5172–5178Publication Date (Print):September 1, 1984Publication History Publi…
A model system consisting of vacuum-deposited aluminum on glass was developed to demonstrate the effectiveness of cavitational activity (occurring within the cooling water supply of a dental ultrasonic scaler) in the removal of particulate material from solid surfaces. The amount of solid material removed from the mod…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOccurrence of electron transfer in the reduction of organic halides by lithium aluminum hydride and aluminum hydrideEdward C. Ashby, R. N. DePriest, A. B. Goel, B. Wenderoth, and T. N. PhamCite this: J. Org. Chem. 1984, 49, 19, 3545–3556Publication Date (Print):September 1,…
Abstract During the development of chemical methods for determining the epoxide content of epoxidised natural rubber (ENR) two methods were found to give results which were identical but which showed a progressive divergence from values obtained by absolute instrumental methods as the level of epoxidation increased. S…
Within the same water body, morphological variants of the same diatom species often coexist. Observations of such phenodemes of Navicula pupula and Amphora ovalis show that, when sexual, they either fail to attract or fail to recognize each other and do not interbreed. Since in both species the morphological and repro…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOptical and electron spin resonance study of cation and cation-crown ether induced dimerization of tetrakis(4-sulfonatophenyl)porphyrinT. K. Chandrashekar, Hans Van Willigen, and M. H. EbersoleCite this: J. Phys. Chem. 1984, 88, 19, 4326–4332Publication Date (Print):Septembe…
SUMMARY The presence of imogolite or other poorly crystalline aluminosilicates in the lower B horizons of podzols can be explained by neoformation from silica in the percolating soil solution and aluminium species liberated from their organic bond by activity of micro‐organisms. There are physicochemical arguments ref…
Hexagonal ferrites with M, Y and W structures were prepared from powders obtained by the decomposition of organometallic salt (citrate) solidified solutions, Due to the improved reactivity of these powders with respect to the classical ceramic ones, a number of advantages were obtained: pure hexaferrites were produced…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSubstrate effects on the chemisorbed and physisorbed layers of methacryl silane-modified particulate mineralsHatsuo Ishida and James D. MillerCite this: Macromolecules 1984, 17, 9, 1659–1666Publication Date (Print):September 1, 1984Publication History Published online1 May 2…
Abstract not Available.
Abstract Fibers of poly( L ‐lactide) (PLLA) with a loosened fibrillar structure were produced by solution spinning from a good solvent (chloroform) in the presence of various additives (camphor, polyurethanes). No decrease in mechanical properties was observed as compared with PLLA fibers spun from a good solvent only…
Abstract The effect of the polymerization method (one‐or two‐stage) on the morphology and properties of specific polyether‐ and polyester‐based urethanes was studied. For the systems investigated, the polymerization technique was somewhat more influential on properties when the soft segment was a polyester than when i…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOxidation of ruthenium(II) and ruthenium(III) porphyrins. Crystal structures of .mu.-oxo-bis[(p-methylphenoxo)(meso-tetraphenylporphyrinato)ruthenium(IV)] and ethoxo(meso-tetraphenylporphyrinato)(ethanol)ruthenium(III)-bisethanolJ. P. Collman, C. E. Barnes, P. J. Brothers, T…
Intramuscular injection of [6-D-tryptophan]-luteinizing hormone-releasing hormone [( D-Trp6]LH-RH) in microcapsules of poly(DL-lactide-co-glycolide), designed to release a controlled dose of the peptide over a 30-day period, decreased the weights of androgen-dependent Dunning prostate tumors in rats and suppressed ser…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMechanism of acetylene and olefin insertion into palladium-carbon .sigma. bondsEdward G. Samsel and Jack R. NortonCite this: J. Am. Chem. Soc. 1984, 106, 19, 5505–5512Publication Date (Print):September 1, 1984Publication History Published online1 May 2002Published inissue 1…
Abstract Results of a preliminary study of the surface of wood exposed to outdoor weathering as well as to UV irradiation showed that ESCA provides valuable information and insight into the manifestation of weathering and photooxidation. From the ESCA spectra, the increase in signal intensities of carbon–oxygen bonds…
Subsolidus phase relations in the low‐Y 2 O 3 portion of the system ZrO 2‐ Y 2 O 3 were studied using DTA with fired samples and X‐ray phase identification and lattice parameter techniques with quenched samples. Approximately 1.5% Y 2 O 3 is soluble in monoclinic ZrO 2 , a two‐phase monoclinic solid solution plus cubi…
Abstract The yields of C 5 and C 6 alkyl nitrates from neopentane, 2‐methylbutane, 2‐methylpentane, 3‐methylpentane, and cyclohexane have been measured in irradiated CH 3 ONONO‐alkane‐air mixtures at 298 ± 2 K and 735‐torr total pressure. Additionally, OH radical rate constants for neopentyl nitrate, 3‐nitro‐2‐methylb…
Abstract Dypingite, Mg 5 (CO 3 ) 4 (OH) 2 ·5H 2 O, was found in materials obtained during the production of high purity magnesia from crude magnesite by the calcination/CO 2 -leaching process. The snow-white, finely crystalline dypingite contained 41.0% MgO; the theoretical value is 41.5%. The X-ray powder data reveal…
Polyfuran films are prepared electrochemically and found to exhibit electrical and optical properties similar to those of polythiophene and polypyrrole, though the electrical conductivity in a doped state is little lower than the latter two polymers. The resistivity of polyfuran is found to be very sensitive to humidi…