Materials Literature
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The orthorhombic crystal structure of 2C 5 H 6 N 3 O 2 + .- Cr 2 O 7 2- (a=22.454 (6), b=15.129 (2), c=5.189 (2) A, Z=4, orthorhombic, P2 1 nb, D x =1.866 g cm -3 ] has been solved using direct methods and refined to wR=0.029 for 2514 reflections. This study provides a step towards a new route to obtain non-linear opt…
Antimicrobial sutures were prepared by the radiation grafting of 2-hydroxyethyl methacrylate (HEMA) monomer on polypropylene monofilament. It was found that the inherent characteristics of monofilaments are considerably influenced by the grafting of poly(HEMA). The grafting decreases the crystalline/amorphous ratio in…
SiO x thin films continue to be developed for polymeric flexible substrates. During the past year significant progress has been made on plasma deposition onto PET, LDPE, BOPP and BON polymer films. In addition, the first two 1.5 meter wide plasma roll coaters were completed and installed. The current state of the roll…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHexagonal-columnar mesophases in substituted phthalocyaninatopolysiloxanesThomas SauerCite this: Macromolecules 1993, 26, 8, 2057–2063Publication Date (Print):April 1, 1993Publication History Published online1 May 2002Published inissue 1 April 1993https://pubs.acs.org/doi/10…
Cables are shielded from electromagnetic interference by wrapping them in conductive tapes such as aluminum polyester laminates, μ‐metals, or metal‐coated non‐wovens. Inherently conducting polymer (ICP) based tapes would be a lightweight option, but these are difficult to produce continuously in large quantities. This…
We introduce the phenomenological equations which describe the diffusion of one species of point defects in silicon single crystals during melt-growth. The chemical potential of point defects frozen into the crystal during CZ crystal growth is estimated, and the formation mechanism of the OSF-ring in CZ crystal is dis…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRelative energies and strain energies of proposed structures for octaphosphorusBenjamin M. Gimarc and D. Scott WarrenCite this: Inorg. Chem. 1993, 32, 9, 1850–1856Publication Date (Print):April 1, 1993Publication History Published online1 May 2002Published inissue 1 April 19…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMorphology of blends of .alpha.,.omega.-diaminopolystyrene with .alpha.,.omega.-dicarboxypoly(ethylene oxide)Katsuhiko Iwasaki, Akira Hirao, and Seiichi NakahamaCite this: Macromolecules 1993, 26, 8, 2126–2131Publication Date (Print):April 1, 1993Publication History Publishe…
Polyimide matrix composites possess an excellent balance of physical and thermal properties. However, currently available systems suffer from a number of drawbacks. Much of R & D is aimed at overcoming these drawbacks and developing new and novel polyimide materials. This review paper will examine recent developme…
Sperm whale apomyoglobin was complexed with iron porphine to examine the influence of completely removed heme side chains on the entire molecular structure.Paramagnetic NMR peak from the proximal histidine of the deoxy protein ensured formation of the iron-histidine bond.Porphine pyrrole-proton NMR signals of the cyan…
Experimental results concerning combustion of freely falling particles of copper, tungsten, steel, tantalum and molybdenum are presented in this paper. The experiments were carried out by the setup based on a method of forming and igniting monodisperse metal particles in pulsed discharge, developed at Odessa State Uni…
A free-energy model for mixtures of charged particles interacting through the Yukawa repulsive potential is derived analytically from the Onsager-type exact lower bound for the free energy of the system. It takes the form of a ``nonlinear mixing rule,'' which relates the configurational free energy of the mixture to t…
Abstract Characterization of the Nonesuch Formation, middle unit of the Proterozoic Oronto Group, as a potential hydrocarbon source for the Lake Superior basin portion of the Midcontinent Rift system requires an understanding of the thermal maturity of the region and its relationship to the thermal history. Illite/sme…
Solids characteristics of foam condensate collected from recirculation aquacultural systems by a foam fractionator were investigated. Particle sizes were analyzed with a particle counter. Foam fractionation removed suspended particles as well as dissolved solids. The majority of the solids removed by foam fractionatio…
The martensitic tetragonal ( t ) → monoclinic ( m ) transformation in 3Y‐TZP displays both athermal and isothermal kinetics; both are stress‐assisted. Room‐temperature transformation was induced with Vickers indentations; the isothermal, or thermally activated, component was induced by annealing indented samples at te…
Caesium accumulation by Chlorella salina, from buffer (pH 8.0) supplemented with 50 μm-CsCl and 137Cs, continued for approximately 15 h and displayed first-order kinetics, indicating a single rate-limiting transport process. Efflux of Cs+ from Cs+-loaded cells occurred in two distinct phases: a rapid initial loss, rep…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPolyoxoanion-supported, atomically dispersed transition-metal precatalyst [(1,5-COD)Ir.cntdot.P2W15Nb3O62]8-: direct oxygen-17 NMR evidence for Ir-ONb2 bonding and for a C3v average symmetry, iridium-to-polyoxoanion support interactionMatthias Pohl and Richard G. FinkeCite t…
We present a rheological study of the gel transition in silica gels resulting from the hydrolysis-condensation of a silicon alkoxide. The complex shear modulus is measured in a large frequency range (${10}^{\mathrm{\ensuremath{-}}2--}$${10}^{2}$ rad/s). The exponents for the viscosity s=0.7\ifmmode\pm\else\textpm\fi{}…
Polyoxometalate complexes are attractive precursors for the preparation of new radical‐ion salts based on π‐electron organic donors of the tetrathiafulvalene (TTF) type, the most widely used molecules in the synthesis of organic conductors and superconductors. The well‐defined sizes and shapes of polyoxometalates, as…
Influence of the atmosphere on the crystal structure of thin tungsten films produced by the evaporation method in vacuum was studied. While the crystal structure of the films produced in a high vacuum ( e.g. , 10 -6 Pa) was bcc, the films took on an A15 structure in oxygen and nitrogen atmospheres ( e.g. , 10 -4 Pa).…