Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTValence band spectra of aluminum oxides, hydroxides, and oxyhydroxides interpreted by X.alpha. calculationsSajan. Thomas and Peter M. A. SherwoodCite this: Anal. Chem. 1992, 64, 21, 2488–2495Publication Date (Print):November 1, 1992Publication History Published online1 May 2…
c-axis-oriented ZnO films were prepared in O2 atmosphere by chemical vapor deposition using zinc acetylacetonate for source material. A minimum value of resistivity, 2.44 Ω cm, was obtained at a film formation temperature of 550 °C. The resistivity of the films was measured at low temperatures (87–297 K). For temperat…
An objective methodology is developed for evaluating toughness curves ( T ‐curves) of ceramics using indentation flaws. Two experimental routes are considered: (i) conventional measurement of inert strength as a function of indentation load; (ii) in situ measurement of crack size as a function of applied stress. Centr…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and characterization of titania aerogelsL. K. Campbell, B. K. Na, and E. I. KoCite this: Chem. Mater. 1992, 4, 6, 1329–1333Publication Date (Print):November 1, 1992Publication History Published online1 May 2002Published inissue 1 November 1992https://pubs.acs.org/d…
The mechanism of the dc electrical conduction and breakdown of perovskite-type titanates was investigated by impedance analysis. Based on an acceptor doped SrTiO3 model material, samples of different microstructures-ceramics, single crystals, and thin films-were employed. This approach allows us to distinguish conduct…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhotophysics of donor-acceptor substituted stilbenes. A time-resolved fluorescence study using selectively bridged dimethylamino cyano model compoundsRene Lapouyade, Konstantin Czeschka, Wilfried Majenz, Wolfgang Rettig, Eric Gilabert, and Claude RulliereCite this: J. Phys.…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThermodynamic interactions in model polyolefin blends obtained by small-angle neutron scatteringN. P. Balsara, L. J. Fetters, N. Hadjichristidis, D. J. Lohse, C. C. Han, W. W. Graessley, and R. KrishnamoortiCite this: Macromolecules 1992, 25, 23, 6137–6147Publication Date (P…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructure and catalytic activity of alumina supported platinum-cobalt bimetallic catalysts. 3. Effect of treatment on the interface layerZoltan Zsoldos and Laszlo GucziCite this: J. Phys. Chem. 1992, 96, 23, 9393–9400Publication Date (Print):November 1, 1992Publication Histo…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHigh-temperature chemistry of the conversion of siloxanes to silicon carbideGary T. Burns, Richard B. Taylor, Youren Xu, Avigdor Zangvil, and Gregg A. ZankCite this: Chem. Mater. 1992, 4, 6, 1313–1323Publication Date (Print):November 1, 1992Publication History Published onli…
The thermal conductivity of a 40 vol% silicon carbide‐particulate‐reinforced aluminum matrix composite was determined as a function of silicon carbide mean particle size ranging from 0.7 to 28 μm. A size dependence was found consisting of a decrease in thermal conductivity with decreasing SiC particle size. This effec…
To explain the observed deviation from the Rapini-Papoular surface energy of nematic-liquid-crystals, we propose a model of the form Tr[(${\mathit{Q}}_{\mathit{i}\mathit{j}}$-${\mathit{Q}}_{0\mathit{i}\mathit{j}}$${)}^{2}$] (${\mathit{Q}}_{\mathit{i}\mathit{j}}$ is the quadrupolar order parameter of the nematic-liquid…
The critical dynamics of charge-density waves (CDW's) just above the threshold for steady-state sliding motion are studied via a renormalization-group expansion in 4-\ensuremath{\epsilon} dimensions. This necessitates the simultaneous treatment of the long-wavelength low-frequency dynamics as well as the singular beha…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMulticritical phenomena and microphase ordering in random block copolymers meltsGlenn H. Fredrickson, Scott T. Milner, and Ludwik LeiblerCite this: Macromolecules 1992, 25, 23, 6341–6354Publication Date (Print):November 1, 1992Publication History Published online1 May 2002Pu…
The Yersinia protein tyrosine phosphatase (PTPase) Yop51, a C235R point mutation (Yop51*), and a protein lacking the first 162 amino acids at the NH2 terminus (Yop51*delta 162) have been overexpressed in Escherichia coli and purified to homogeneity through the use of CM Sephadex C25 cation exchange chromatography foll…
We study the role of surface energy in determining twin width near an austenite—twinned-martensite interface. We find that there are two distinct regimes, depending on the relative values of the elastic moduli, surface energy density and grain size. In the first regime the twin width w is constant, of order L 1/2, whe…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNew mixed organic-inorganic polymers: hydrolysis and polycondensation of bis(trimethoxysilyl)organometallic precursorsRobert J. P. Corriu, Joel J. E. Moreau, Philippe Thepot, and Michel Wong Chi ManCite this: Chem. Mater. 1992, 4, 6, 1217–1224Publication Date (Print):Novembe…
In Escherichia coli high-level production of some heterologous proteins (specifically, human prorenin, renin, and bovine insulin-like growth factor 2) resulted in the induction of two new E. coli heat shock proteins, both of which have molecular masses of 16 kDa and are tightly associated with inclusion bodies formed…
In this review, we have summarized the general structural features of the catalytic subunit of cAMP-dependent protein kinase, emphasizing those features that will very likely be conserved in all members of the protein kinase family. The overall secondary structure of the catalytic core will probably be conserved throu…
The sources of an absorption band at \ensuremath{\sim}5 eV observed in ${\mathrm{SiO}}_{2}$:${\mathrm{GeO}}_{2}$ and ${\mathrm{GeO}}_{2}$ glasses have not been unambiguously identified. Results reported here are consistent with the source of two types of neutral oxygen vacancies. Samples of ${95\mathrm{S}\mathrm{i}\ma…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRemoval of nitrogen monoxide through a novel catalytic process. 2. Infrared study on surface reaction of nitrogen monoxide adsorbed on copper ion-exchanged ZSM-5 zeolitesMasakazu Iwamoto, Hidenori Yahiro, Noritaka Mizuno, Wen Xiang Zhang, Yoshihiro Mine, Hiroshi Furukawa, an…