Materials Literature
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Some of the title compounds have been found to exhibit ferroelectricity at room temperature. Their structure types can be classified in three series according to the cations coordination number (CN) and size: 1.- single cation with CN 4: olivine and glaserite; 2.- two cations with CN 4: Beryllonite and stuffed tridymi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCleavage of poly(diorganosiloxanes) by trimethylaluminumAllen W. Apblett and Andrew R. BarronCite this: Organometallics 1990, 9, 7, 2137–2141Publication Date (Print):July 1, 1990Publication History Published online1 May 2002Published inissue 1 July 1990https://pubs.acs.org/d…
Monodispersed spherical β‐SiC powder was synthesized by heating spherical gel powder derived from the hydrolysis of a mixture of phenyltriethoxysilane and tetraethyl orthosilicate. The solution was prepared in a beaker and hydrolyzed by NH 4 OH without stirring. The monodispersed spherical gel powder of submicrometer…
1. Summary The structure of native poly(3-hydroxybutyrate) (PHB) granules of Alcaligenes eutrophus was characterized in wet cells or wet granules by analysis of X-ray diffraction. The PHB granules in intact cells were completely amorphous, but became crystalline after treatment with alkali or sodium hypochlorite. The…
Diamonds were reproducively synthesized from graphite in the presence of Na 2 SO 4 , MgSO 4 , CaSO 4 ·1/2H 2 O, Mg(OH) 2 and Ca(OH) 2 at high pressure of 7.7 GPa and a temperature of 2150°C. Although starting graphite was completely transformed to diamond in the presence of the sulfates or hydroxides, no transformatio…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFerromagnetic behavior of linear chain electron-transfer complexes. Decamethylferrocene electron-transfer salts of 2,5-disubstituted-7,7,8,8-tetracyano-p-quinodimethanes. Magnetic characterization of [Fe(C5Me5)2].cntdot.+[TCNQI2].cntdot.- and structures of [TCNQI2]n- (n = 0,…
This study explores the feasibility of using psychophysical methods to assess one component of sensorial comfort—moisture sensation in clothing. We used the psy chophysical method of constant stimuli to assess the absolute and differenoe thresholds of moisture sensation in the upper back area of twelve female voluntee…
A Mn3 chain bridged by four bidentate and two monodentate carboxylate ligands characterizes the MnII title complex 1. Unique features are the monodentate acetate bridges, which have a “dangling” oxygen atom that influences the molecular structure through weak interactions with the terminal Mn atoms.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTArene exchange by phosphorus donors in the 19-electron complexes FeICp(arene): kinetics, mechanism, and salt effects. Interconversion, radical-type reactions, and electron-transfer chemistry of the new 17-electron and 19-electron radicals FeICpLn (L = phosphine, phosphite; n…
Samples of , , and a commercial 304 stainless steel were passivated in 0.1 M sulfuric acid solution at constant potentials. The alloying effects of Mo and Ni on the corrosion property were studied in relation to their potentio‐dynamic polarization curves. A revolutionary new method of analysis in analytical chemistry,…
Polarized absorption spectra of 13 nematic liquid crystals (LCs) with various conjugations and structures were measured in the spectral range from 185 to 400 nm. These absorption bands represent all the π→π* electronic transitions of these LCs. Resonance wavelength, absorption coefficient, and dichroic ratio of each b…
Exceptionally well preserved, nearshore, shallow water diatom assemblages of late Aptian to early Albian age (115-110 Ma) are described for Ocean Drilling Program (ODP) Site 693, Dronning Maud Land, Weddell Sea, Antarctica. These assemblages are significant because they allow insights into Phylogenetic relationships d…
Abstract TiO 2 and CeO 2 are will known for inducing strong metal‐support interactions J(SMSI) of a different nature when used as supports for Pt catalysts. X‐ray photoelectron spectroscopy analysis of mixtures of TiO 2 CeO 2 oxide supports (80:20 and 20:80) reveals at the surface a remarkable stabilization of cerium…
The degree of salt resistance of Pistacia spp. grown in the western United States is not adequately known. This study evaluated seedling growth and ion uptake characteristics of two Pistacia spp. and one hybrid in outdoor lysimeters for two seasons. After 12 weeks, seedling stem elongation of P. atlantica Desf., P. te…
Surface plasmon-polaritons may be excited by photons at a metal-air boundary if a grating is used to provide the necessary extra momentum. Rotation of the grating so that the grooves are no longer perpendicular to the plane of incidence reduces the coupling efficiency while at the same time producing some s-polarised…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThermally safe operation of a semibatch reactor for liquid-liquid reactions. Slow reactionsMetske Steensma and K. Roel WesterterpCite this: Ind. Eng. Chem. Res. 1990, 29, 7, 1259–1270Publication Date (Print):July 1, 1990Publication History Published online1 May 2002Published…
Abstract In order to develop new composite materials between reactive metals and polymers, it is proposed to place organic monomers at the metal/polymer phase boundary, which can be coupled by covalent/ionic bonds to reactive centres of the metal substrate and later by covalent bonds to the polymer itself. As a first…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTApproaches to orthogonally fused conducting polymers for molecular electronicsJames M. Tour, Ruilian Wu, and Jeffry S. SchummCite this: J. Am. Chem. Soc. 1990, 112, 14, 5662–5663Publication Date (Print):July 1, 1990Publication History Published online1 May 2002Published inis…
Abstract The energies of photoelectron and Auger lines of gallium and nitrogen in GaN thin films obtained by reactive sputtering are derived. From previous RBS investigations, such were found to be stoichiometric in the bulk. The XPS surface analysis of the films gives a chemical content of ∼20% gallium oxide. Depth p…
Abstract A commercial platinized tin oxide catalyst used for low‐temperature CO oxidation has been characterized using ion scattering spectroscopy, Auger electron spectroscopy and electron spectroscopy for chemical analysis before and after reduction in 40 Torr of CO for 1 h at various temperatures in the range 75–175…