Materials Literature
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A ceramic, Joule‐heated, slurry‐fed melter will be used to vitrify Savannah River Site high‐level waste at the Defense Waste Processing Facility (DWPF) in Aiken, SC. The entire vitrification process must be performed remotely and the borosilicate host glass must accommodate a variety of waste compositions. The control…
SiO2-passivation layers formed by thermal oxidation and various chemical vapor deposition (CVD) processes have been investigated by infrared spectroscopy and wet chemical etching studies in ammonium hydroxide water solutions. In order to obtain effects of thermal annealing on the dislocation structure of deposited oxi…
Off-axis tension tests were performed on SCS-6/Ti-6-4 metal matrix com posite. A one-parameter plasticity model was used to characterize the elastic-plastic prop erties. In addition, a micromechanical model was developed assuming elastic fiber and elastic-plastic matrix properties. This model was employed to relate th…
SUMMARY The X‐ray microanalytical spatial resolution is determined experimentally in various analytical electron microscopes by measuring the degradation of an atomically discrete composition profile across an interphase interface in a thin‐foil of Ni‐Cr‐Fe. The experimental spatial resolutions are then compared with…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRemote oxidation of unactivated carbon-hydrogen bonds in steroids via oxometalloporphinatesPaul A. Grieco and Timothy L. StukCite this: J. Am. Chem. Soc. 1990, 112, 21, 7799–7801Publication Date (Print):October 1, 1990Publication History Published online1 May 2002Published i…
A technique was developed to estimate the R ‐curve behavior of Y‐TZP using indentation‐produced flaws. This technique allows crack‐growth resistance to be determined for short crack extensions (micrometers). For Y‐TZP samples sintered at 1600°C for 1 h (mean grain size, 0.7 μm), the crackgrowth resistance increases ra…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMechanistic studies of olefin epoxidation by a manganese porphyrin and hypochlorite: an alternative explanation of saturation kineticsJames P. Collman, John I. Brauman, Philip D. Hampton, Hiroo Tanaka, D. Scott Bohle, and Robert T. HembreCite this: J. Am. Chem. Soc. 1990, 11…
Graphite-alkaline metal systems (lithium, potassium, rubidium, cesium) have been investigated under high-pressure conditions. New graphite intercalation compounds of C4M composition with alkali metal contents twice as high as in those obtained with traditional methods without applying high pressure have been produced.…
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTReaction of cyclohexene with iodosylbenzene catalyzed by non-porphyrin complexes of iron(III) and aluminum(III). Newly discovered products and a new mechanistic proposalYihui Yang, Francois Diederich, and Joan Selverstone ValentineCite this: J. Am. Chem. Soc. 1990, 112, 21,…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFluorine-containing photoreactive polyimide. 6. Synthesis and properties of a novel photoreactive polyimide based on photo-induced acidolysis and the kinetics for its acidolysisToshihiko Omote, Ken'ichi Koseki, and Tsuguo YamaokaCite this: Macromolecules 1990, 23, 22, 4788–4…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA photoelectron-photoion coincidence study of iron pentacarbonylK. Norwood, A. Ali, G. D. Flesch, and C. Y. NgCite this: J. Am. Chem. Soc. 1990, 112, 21, 7502–7508Publication Date (Print):October 1, 1990Publication History Published online1 May 2002Published inissue 1 Octobe…
The viscosities of supercooled liquid fructose and glucose are measured between a lower viscosity limit corresponding to 95°C and an upper limit of about 10 6 Pa.s. The glass transition temperature of fructose is estimated from the viscosity data using different extrapolation procedures. The Vogel‐Tamman‐Fulcher and p…
The synthesis and crystal structure of two novel adducts of manganese(I1) and nitronyl nitroxide radicals of formula Mn- (hfac)z(NITpPy)z (I) and MnCI,(NITpPy), (II), where hfac = hexafluoroacetylacetonate and NlTpPy = 2-(4-pyridyl)- 4,4,5,5-tetramethyI-4,5-dihydroH-l-i midazolyl-1 - oxy1 3-oxide, are reported. Compou…
Abstract Ordered illite/smectite (I/S) and illite in a pelitic rock from a prograde metamorphic sequence in North Wales were observed by transmission electron microscopy. The dominant phyllosilicate noted was diagenetic-metamorphic illite, occurring as subparallel packets of layers, each about a few hundred Ångstroms…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPolyhedral aluminosilsesquioxanes as models for aluminosilicates: unique synthesis of anionic aluminum/silicon/oxygen frameworksFrank J. Feher and Keith J. WellerCite this: Organometallics 1990, 9, 10, 2638–2640Publication Date (Print):October 1, 1990Publication History Publ…
The ground state of the SiC3 molecule is found to be a closed-shell cyclic C2v symmetry structure which can be described as a four-membered ring with a transannular (cross ring) carbon–carbon bond, r(C–C)=1.469 Å. Theoretical studies with a triple-zeta plus double-polarization function (TZ2P) basis set in conjunction…
alpha-Spectrin, myosin light chain kinase (MLCK), and caldesmon have been detected in the nuclei of rat liver cells by 125I-calmodulin overlay, immunoblotting, and immunocytochemical methods. alpha-Spectrin is localized in the nuclear matrix, nuclear envelope, and nuclear pores. It has also been detected inside the nu…
Upon weekly i.m. injections of disodium gold thiomalate (Na2AuTM) 100% of A.SW mice produced IgG autoantibodies to antinuclear Ag and nucleolar Ag, respectively; about 70% of C57BL/6 mice produced IgG antinuclear Ag, whereas DBA/2 mice were resistant. Moreover, C57BL/6 mice, but not DBA/2 mice, showed increased mesang…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNuclear magnetic resonance study of polyisoprene/poly(vinylethylene) miscible blendsJoel B. Miller, K. J. McGrath, C. M. Roland, C. A. Trask, and A. N. GarrowayCite this: Macromolecules 1990, 23, 21, 4543–4547Publication Date (Print):October 1, 1990Publication History Publis…