Materials Literature
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Natural systems provide time-controlled experiments on scales unreachable in the laboratory, and with complexities unapproachable by computer experiments. Since temperature (undercooling) cannot be directly scaled with time, in situ crystallization experiments provide information unavailable by other means. The kineti…
By applying the Landau theory, the appearance of the antiferroelectric phase in smectic liquid crystals and the double hysteresis loop are interpreted. Several types of phase sequences including the antiferroelectric, ferroelectric and/or ferrielectric phase are obtained phenomenologically. The D - E curves in the ant…
Communicated Jan. 12, 1990
The first two editions of the E. coli Gene-Protein Index were published to provide identifications of protein spots resolved by two-dimensional gel electrophoresis as the products of known genes. This third edition has been expanded to include information about genes and proteins gained directly from two-dimensional g…
A series of Pt(diimine)(dithiolate) complexes has been synthesized and characterized spectroscopically. The diimine ligands include 2,2′-bipyridine (bpy), 1,10-phenanthroline (phen), 4,4′-dimethyl-2,2′-bipyridine (dmbpy), 4,4′-diphenyl-2,2′-bipyridine (dpbpy) and 4,7-diphenyl-1,10-phenanthroline (dpphen) while the dit…
A new density modification technique - histogram matching - is being developed with encouraging results. Its application to the known structure of pig 2Zn insulin refines the 6500 1.9 Å MIR phases from a mean error of 60° to one of 46°. With these refined phases as a starting point for phase extension to 1.5 Å, the me…
The addition of Ta 2 O 5 , Nb 2 O 5 , and HfO 2 enhanced the transformability of Y 2 O 3 ‐stabilized tetragonal ZrO 2 polycrystal (Y‐TZP), which was indicated by an increase in phase transformation temperatures and fracture toughness of Y‐TZP. Comparison of the alloying effects of these oxides on the transformability…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhotochemically induced isothermal phase transition in polymer liquid crystals with mesogenic phenyl benzoate side chains. 1. Calorimetric studies and order parametersTomiki Ikeda, Shin Horiuchi, Durga B. Karanjit, Seiji Kurihara, and Shigeo TazukeCite this: Macromolecules 1…
Coverage includes: thin films; semiconductors; gallium arsenide; friction-reducing coatings; and tribological properties.
A model is used to predict solid particle formation during spray pyrolysis by correlating droplet shrinkage before salt precipitation with its relative solution saturation. For the rapid drying conditions and droplet size of ∼ 10 μm, which are characteristic of conventional spray pyrolysis, solid salt particles are fo…
The axisymmetric creeping motion of a neutrally buoyant deformable drop flowing through a circular tube is analysed with a boundary integral equation method. The fluids are immiscible, incompressible, and the bulk flow rate is constant. The drop to suspending fluid viscosity ratio is arbitrary and the drop radius vari…
Hydroboration of π-donor substituted alkynes D–CC–H [D = Ph2P, 4-X–C6H4-(X = H, MeS, MeO, H2N), and (η5-C5H5)Fe(η5-C5H4-)] with dimesitylborane {[(mes)2BH]2, mes = 2,4,6-Me3C6H2} yields air-stable ‘push–pull’E-alkenes of the form E-D–CHCH–B(mes)2, which possess large molecular hyperpolarizabilities, β, as shown by ele…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSolvent- and mechanical-treatment-induced conformational transition of silk fibroins studies by high-resolution solid-state carbon-13 NMR spectroscopyMika Ishida, Tetsuo Asakura, Motoko Yokoi, and Hazime SaitoCite this: Macromolecules 1990, 23, 1, 88–94Publication Date (Prin…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhotochemically induced isothermal phase transition in polymer liquid crystals with mesogenic phenyl benzoate side chains. 2. Photochemically induced isothermal phase transition behaviorsTomiki Ikeda, Shin Horiuchi, Durga B. Karanjit, Seiji Kurihara, and Shigeo TazukeCite th…
Recently, spaceplanes such as "Orient Express" projected by the United States are attracting attention as new space transportation media. In Japan also, the study for developing spaceplanes is recognized as one of the most influential programs among the various research and development projects.In the development of t…
The defect structure of calcia-stabilized zirconia, a topic of long-standing controversy, has been examined by atomistic computer simulation techniques. Defect association energies for an anion vacancy and a dopant calcium ion at both nearest-neighbour and next-nearest-neighbour (NNN) positions have been determined an…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOsmium tetraoxide catalyzed vicinal hydroxylation of higher olefins by using hexacyanoferrate(III) ion as a cooxidantMakoto Minato, Keiji Yamamoto, and Jiro TsujiCite this: J. Org. Chem. 1990, 55, 2, 766–768Publication Date (Print):January 1, 1990Publication History Publishe…
We present a theoretical study of the thermodynamics and of the kinetics of grafting end-functionalized polymers to an interface. The equilibrium surface coverage and thickness of the grafted layer are predicted as a function of molecular parameters such as the molecular weight of the chains, the solution concentratio…
The effect of components Fe, Mn, and Si on the electrochemical behavior of phases Al 3 Fe , αAl (Fe, Mn)Si, and δ AlFeSi were investigated in NaOH solutions. Anodic polarization of the phases leads, under certain conditions, to an enrichment of the surface with the more noble components. Enrichment with Fe is detrimen…
A colorimetric method for the determination of hydroxyproline as a measure of collagen in meat and meat products has been collaboratively studied in 18 laboratories. The method includes hydrolysis with sulfuric acid, oxidation with chloramine-T, and formation of a reddish purple complex with 4-dimethylaminobenzaldehyd…