Materials Literature
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A series of different isodesmic and homodesmic reactions defining strain energies in 3-membered rings are described and discussed. One isodesmic and one homodesmic reaction are applied numerically with the purpose of estimating strain in heterosiliranes including second-row and third-row heteroatoms. All molecules inv…
The reactions of Ga(CH(2)CH(3))(3) with variable amounts of elemental sulfur, S(8), in toluene or benzene at different temperatures result in the insertion of sulfur into the Ga-C bonds to form the compounds Ga[(S-S)CH(2)CH(3)](3) (I) and Ga[(S-S-S)CH(2)CH(3)](3) (II). Compound I was isolated from the reaction at low…
Syntheses of rhabdophane-(Y) (hexagonal YPO4·nH2O (n=0.5 to 1) were carried out by precipitation from aqueous solutions of Y(NO3)3·6H2O, (NH4)2HPO4 and citric acid with the mixing mole ratios of (NH4)2HPO4/Y(NO3)3·6H2O=4 and citric acid/Y(NO3)3·6H2O (C/Y)=5 to 30. Rhabdophane was obtained when those solutions were mai…
Tritium retention measurements have been performed for two carbon composites both before and after neutron irradiation. These two composites were FMI-222 manufactured by Fiber Materials Incorporated and MKC-1PH by Mitsubishi Kasei. The neutron irradiations were performed in the High Flux Isotope Reactor (HFIR) at Oak…
The effect of specific ions present during the precipitation of alumina precursor (aluminum hydroxide) on resulting alumina surface acidity has been investigated. It was found that both the method of pH control and the nature of ions introduced to the slurry apparently affected the phase composition of aluminum hydrox…
Reactions of benzophenone ketyl radicals with the water-soluble iron(III)porphyrin, [FeIII(tpps)]3–[tpps =meso-tetrakis(p-sulfonatophenyl)porphyrinate], and a nitric oxide adduct of the iron(II) form of the porphyrin, [FeII(tpps)(NO)]4–, have been studied by laser photolysis in aqueous solutions. Reactions of ferricyt…
The possible use of tungsten as divertor target material is discussed. In addition to its extremely low sputtering yields, another very favourable aspect of this material is the high probability of prompt redeposition. First experimental observations are encouraging. The erosion fluxes from a tungsten target tile are…
Diffusible hydrogen behavior in zinc electrogalvanized high strength steel has been investigated by use of a newly developed hydrogen content determining method for better understanding of delayed fracture of electrogalvanized high strength steel.For as-electrogalvanized high strength steel, there are two peaks on the…
Structure factors for small, hydrothermally grown samarium orthoferrite, SmFeO3, were measured with focused A = 0.7 A synchrotron radiation. Approximate high symmetry in the Ap images indicates that cations deform the electron density far more strongly than the O atoms. The most obvious effect is on distribution of th…
Partial substitution of La by Ag, instead of Sr, in LaMO3(M = Co, Mn, Ni) perovskite causes a large increase in the catalytic activity of the perovskite in the complete combustion of dilute methane for its emission control, at low temperature (< 700 °C) and high space velocity (51 000 cm3 g–1 h–1); Ag-doped LaCoO3 sho…
Swelling vermiculite clays are ideal systems in which to study confined aqueous and organic fluids. The clay platelets themselves are well characterised and carry a negative charge of around 0.1–0.2 C m–2. To balance this negative layer charge a variety of interlayer counterions can be exchanged into the clay pores. T…
New research and development needs for the drying of ceramics are prooosed. The researches on the ceramic drying are briefly reviewed and the role of the drying in the ceramic production process iS summarized. The drying must deal with molded materials and the problem is of significant difference from another drying w…
The capillary flow porometry(CFP)technique, known as the bubble point method, has been applied to measure the entire pore size distribution (PSD)of nonwoven geotextiles. The classical technique is based on the differential analysis of two test runs: a wet run, during which the specimen is saturated by a wetting fluid,…
Abstract Twelve bacterial isolates, four of them assigned to the genus Acinetobacter , were taken from sewage of a treatment plant with Enhanced Biological Phosphorus Removal (EBPR) and screened for phosphorus uptake, polyphosphate (polyP) accumulation and adsorption under limited carbon and nitrogen conditions. In ad…
The catalytic effect of dielectric packings inside the discharge gap on the yield of ozone generation was studied under silent discharge conditions. Porous silica of developed internal surface and quartz glass grains were used as the packings. In the presence of coarser grains of both materials, higher ozone concentra…
The new material is composed of alternating bonded layers of high strength aluminum sheets and unidirectional hybrid FRP layers. A hybrid FRP layer is also composed of a CFRP layer sandwiched in between two KFRP layers. The CFRP layers prevent kink band formation in the KFRP layers. The KFRP layers prevent growth of m…
The polyethylene powders studied were synthesized by both slurry and gas-phase processes at temperatures ranging between 30 and 85 °C. Fibers were drawn from these nascent powders under identical processing conditions. The maximum achievable draw ratio was found to be strongly dependent on synthesis conditions. Highes…
We discuss macroemulsions stabilized by silver interfacial colloidal films and the effect of dithizone on them. These emulsions are characterized by a very sharp size distribution. We find that dithizone, which is known for its strong interaction with silver, strongly affects the state of flocculation of the colloid.…
The charge transfer (CT) excited states of Ru(II)OEP(Py) 2 and Ru(II)TPP(Py) 2 (TPP = tetraphenylporphyrin, OEP = octaethylporphyrin, and Py = pyridine) have been investigated by nanosecond time-resolved resonance Raman (TR 3 ) spectroscopy. The spectra reveal unexpected differences between the two species. The TR 3 s…
The tetranuclear copper(II) complex [{Cu(O2CMe)(OMe)}4] has been found to contain an unusual open cubane Cu4O4 framework defined by two interpenetrating copper and oxygen planes rather than two tetrahedra; it also shows strong antiferromagnetic coupling.