Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA Laser-Induced Fluorescence Study of OH Desorption from Pt in H2O/O2 and H2O/H2 MixturesErik Fridell, Arne Rosen, and Bengt KasemoCite this: Langmuir 1994, 10, 3, 699–708Publication Date (Print):March 1, 1994Publication History Published online1 May 2002Published inissue 1…
RATIONALE AND OBJECTIVES: A prior study indicated that differences in the x-ray linear attenuation coefficients of cancerous and normal breast tissues tend to increase as the energy of the incident beam decreases. The authors investigated x-ray energies down to 20 keV. In the current study, the linear attenuation coef…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLayer Structure.1.Poly(phenylene-terephthalamide)s Derived from Mono-, Di-, and Tetrakis(alkylthio)terephthalic AcidsHans R. Kricheldorf and Angelika DomschkeCite this: Macromolecules 1994, 27, 6, 1509–1516Publication Date (Print):March 1, 1994Publication History Published o…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThermochromism of Specific Crystal Form Oxotitanium Phthalocyanines Studied by Electroabsorption and X-ray Diffraction MeasurementsToshiro Saito, Yasushi Iwakabe, Toshiyuki Kobayashi, Shigeo Suzuki, and Takao IwayanagiCite this: J. Phys. Chem. 1994, 98, 11, 2726–2728Publicat…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTComplexation of Poly(vinyl alcohol)-Congo Red Aqueous Solutions. 1. Viscosity Behavior and Gelation MechanismMitsuhiro Shibayama, Fumiyoshi Ikkai, Ryuji Moriwaki, and Shunji NomuraCite this: Macromolecules 1994, 27, 7, 1738–1743Publication Date (Print):March 1, 1994Publicati…
Departments of Anesthesiology, F. Edward Herbert School of Medicine, Uniformed Services University of the Health Sciences, Bethesda, Maryland, and Walter Reed Army Medical Center, Washington, DC Address correspondence and reprint requests to Steven M. Karan, MD, Uniformed Services University, Department of Anesthesiol…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAir activated organotin catalysts for silicone curing and polyurethane preparationBernard Jousseaume, Nicolas Noiret, Michel Pereyre, Annie Saux, and Jean Marc FrancesCite this: Organometallics 1994, 13, 3, 1034–1038Publication Date (Print):March 1, 1994Publication History P…
Abstract Two kinds of oxygen-deficient phases around LaNiO2.5 were obtained by a low-temperature H2 reduction of perovskite-type LaNiO3. An antiferromagnetic LaNiO2.5 with TN 140 K seems to be stoichiometric and a small amount of excess oxygen leads to a new ferromagnetic phases. A structural refinement has revealed t…
Abstract The addition of various nucleating agents to a polymer leads to the modification of its crystalline structure, i.e., the formation of small spherulites with consequent changes in mechanical and optical properties. The aim of our research was to determine the role of nucleating agents on the crystallization of…
An experimental investigation is reported on the dynamic response of a clamped circular plate struck transversely by a mass at any point along a radial line. A study is made of the variation of the failure mode with a change of striker diameter-plate thickness ratio, together with an assessment of transverse shear eff…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and Luminescence of Lanthanide Complexes of a Branched Macrocyclic Ligand Containing 2,2'-Bipyridine and 9-Methyl-1,10-phenanthroline SubunitsNanda Sabbatini, Massimo Guardigli, Ilse Manet, Fabrizio Bolletta, and Raymond ZiesselCite this: Inorg. Chem. 1994, 33, 5,…
Abstract Iowaite has been re-examined using new, well crystallized material from the Palabora open pit mine, Transvaal. Microprobe, carbon analyser and thermal analyses, powder and single-crystal X-ray diffraction, infrared, UV-visible and mass spectroscopic and optical studies were made. The ideal formula is (OH) 16…
Abstract N-Alkyl imidazoles are effective axial ligands to achieve highly enantioselective epoxidation of unfunctionalized olefins by combined use of molecular oxygen and pivalaldehyde with optically active Mn(III)-salen-type complex catalysts. In the presence of N-alkyl imidazole, the epoxidation of 2,2-dimethylchrom…
In order to elucidate the role of the aromatic ring in recognition of the sugar ring, Trp-62 of hen egg white lysozyme, which is proposed on the basis of x-ray crystallography data to make contact with a sugar ring through van der Waals interaction, was replaced with aliphatic amino acids (Leu, Ile, Val, and Ala) and…
Studies of binding of substrates and inhibitors of the enzyme D-xylose isomerase show, from X-ray diffraction data at 1.6-1.9 A resolution, that there are a variety of binding modes. These vary in the manner in which the substrate or its analogue extend, on binding, across the carboxy end of the (betaalpha)(8)-barrel…
Abstract The principal features of models of structural relaxation in the glassy state were reviewed. The concepts of fictive temperature as the structural parameter and nonexponentiality and nonlinearity of structural relaxations were described. Various expressions for the structural relaxation time were presented an…
The catalytic domain of Schizosaccharomyces pombe casein kinase-1 (the product of the cki1 gene) has been overexpressed in Escherichia coli, purified by chromatographic methods, characterized in vitro, and crystallized in the presence and absence of nucleotide substrate. The best crystals belong to the trigonal space…
Abstract Homopolymeric polyacrylonitrile and fibre‐forming copolymers containing either vinyl acetate or methyl acrylate comonomer have been studied by thermal analysis (DSC, TGA and DTG) at various heating rates (10–100 K min −1 ) and under air and nitrogen. Three well‐defined pyrolysis stages have been observed whic…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFirst Observation of the Converse Flexoelectric Effect in Bilayer Lipid MembranesA. T. Todorov, A. G. Petrov, and J. H. FendlerCite this: J. Phys. Chem. 1994, 98, 12, 3076–3079Publication Date (Print):March 1, 1994Publication History Published online1 May 2002Published iniss…
Part of the Al[sbnd]Ni[sbnd]Fe alloy system, including the region of the decagonal phase, was studied by scanning electron microscopy, energy-dispersive X-ray analysis, X-ray diffractometry and transmission electron microscopy. The decagonal phase is thermodynamically stable in a narrow compositional range around Al71…