Materials Literature
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Fibrous monolithic ceramics were fabricated in the alumina/nickel system. The microstructure consists of high‐aspect‐ratio polycrystalline cells of alumina separated by thin cell boundaries of nickel. The nickel content in the material is 3 to 8 vol%. The fibrous monolith with uniaxially aligned cells fails noncatastr…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHigh Modulus and High Tg Thermally Stable Polymers from Di-p-ethynylbenzoyl Ester Monomers: Synthesis, Solid State Polymerization; Processing, and Thermal PropertiesAnastasios P. Melissaris and Morton H. LittCite this: Macromolecules 1994, 27, 10, 2675–2684Publication Date (…
Currently, applications of conducting polymers look promising because of the significant advances made in improving the stability and processing characteristics of these materials. The author discusses some of the developments which have taken place and looks at several applications, including power equipment, light e…
A monoclinic crystal of hen egg lysozyme (HEL, E.C. 3.2.1.17) was obtained at 313 K from a 10%(w/v) NaCl solution at pH 7.6 containing 5%(v/v) 1-propanol. Cell dimensions were a = 27.23, b = 63.66, c = 59.12 A and beta = 92.9 degrees, and the space group was P2(1). The unit cell contains four molecules (V(m) = 1.79 A(…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInterfacial Free Energy between Hard-Sphere Solids and FluidsD. W. Marr and A. P. GastCite this: Langmuir 1994, 10, 5, 1348–1350Publication Date (Print):May 1, 1994Publication History Published online1 May 2002Published inissue 1 May 1994https://pubs.acs.org/doi/10.1021/la00…
Abstract It was found that at low residual strains, the modulus of double network rubbers can be less than that of an isotropic elastomer of equal crosslink density. At higher residual strains, the equilibrium modulus is higher for the double network. This aspect of the behavior of networks was investigated using two…
Slow strain rate tests of cold-worked X-52 carbon (C) steel showed stress corrosion cracking (SCC) could be induced in dilute aqueous sulfate solutions at 50°C. The crack growth rate was of the same order of magnitude reported previously for carbonated solutions. Cracking susceptibility increased for potentials more a…
Significant discrepancies were generally reported in the dynamics of BaTiO 3 between results deduced from various experimental techniques. Here dielectric and quasi-elastic light scattering measurements are investigated on high-quality BaTiO 3 crystals. We show that two relaxators have to be introduced below the soft-…
The presence of surface competing cations and pH are expected to have an influence on the cation adsorption-desorption behavior of soils. In this study, we evaluated the adsorption-desorption behavior of K+ in the presence of solution Ca2+ (binary) or in the presence of solution Ca2+ plus NH4 (ternary) and the adsorpt…
Compositional characterization of a solid phase material isolated by extraction from filtered liquid phase diesel fuels is reported. This solid phase material (SMORS) is shown to be the product of reactive fuel constituents and intermediate to the formation of fuel insoluble sludge. The composition of this material ch…
A methodology is reported for defining a class of ferromagnetic oxides, based on theoretical and experimental considerations. Starting from phenomenological superexchange theory, a perovskite oxide with composition La2MnIrO6 was proposed to order ferromagnetically. Self-consistent band-structure calculations are used…
As a computational tool, neural networks are a rapidly emerging technology that can significantly enhance analysis or even provide solutions to a number of very difficult problems; includes an extensive appendix of additional reference materials.
Plasma spraying, originally a surfacing technology used for ceramic coating of metal and nonmetal substrates, is suitable for producing large, full ceramic bodies, such as plates and tubes, in situ to almost the desired dimensions; i.e., conventional methods of designing by molding and casting green bodies followed by…
Four new taxa belonging to the genus Attheya West are described from the west coast of Britain and from the North Sea. Attheya arenicola sp. nov. was found on sandy beaches in southwest Wales, Cornwall and the west coast of Scotland in the U.K., and on the edge of the North Sea at Renesse, Netherlands. A. flexuosa var…
We have used thermodynamic and kinetic techniques to monitor the guanidinium chloride induced (GdmCl-induced) denaturation of N-(5'-phosphoribosyl)anthranilate isomerase from Escherichia coli (ePRAI). Although CD-monitored equilibrium denaturation curves are consistent with cooperative unfolding of the protein centere…
Ultrafine particles of RuO 2 ‐ SnO 2 binary oxides have been prepared by a sol‐gel process consisting of hydrolysis and condensation of metal alkoxide alcoholic solutions. The binary oxides calcined at 450°C were composed of two rutile‐type oxide phases: RuO 2 and ( Ru , Sn ) O 2 . The Ru metallic phase also was found…
Abstract Oxidative coupling of methane was conducted by using membrane reactors. The nonporous membrane film that consisted of PbO modified by alkaline or alkaline earth compound was supported on porous SiO 2 ‐Al 2 O 3 tube. Higher hydrocarbons were successfully synthesized with high selectivity (about 90%). A kinetic…
Photo-oxidation of some representative spiropyrans and spiro-oxazines does not seem to involve singlet oxygen O2 (1 Δg). The photochromes rather behave, in the spiro and merocyanine form, as O2 (1 Δg) quenchers. Only a methoxy-nitro benzopyran derivative was found to promote formation of singlet oxygen. Superoxide ani…
Magnetization measurements, reported for ${\mathrm{Fe}}_{3\mathrm{\ensuremath{-}}\mathit{x}}$${\mathrm{Ti}}_{\mathit{x}}$${\mathrm{O}}_{4}$ in the compositional range 0\ensuremath{\le}x0.04, were used to determine magnetocrystalline anisotropy constants as a function of x and temperature. Magnetic measurements were pe…
The dielectric response of a number of homogeneously aligned FLC cells has been investigated. Several relaxation processes exhibiting behaviour with different relaxation times are found for the first time. These are identified with the structure of the smectic layers in the cell and the parameters of the FLC mixtures.…