Materials Literature
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Eleven species of Achnanthes from Signy Island, South Orkney Islands are described including one new species. Benthic algal material from a range of shallow lakes of varying trophic status was examined by light microscopy and scanning electron microscopy. Detail of morphology is provided with an overview of the taxono…
Ruthenium dioxide (RuO 2 ) films are studied for use as a bottom electrode of the (Ba, Sr)TiO 3 thin-film capacitor. RuO 2 films have been deposited by reactive DC magnetron sputtering of ruthenium at a relatively low sputtering power. Stoichiometric RuO 2 films are obtained at oxygen partial pressures as low as 0.6 m…
The oxidation behaviors of IG-110 and PGX graphites were experimentally investigated in the temperature range from 500 to 1,500°C for the oxygen concentration of 10 and 30 wt% (1.37 and 5.09 mol%) and the reacting gas velocities of 6.63 and 19.9 m/s (estimated at 900°C). The graphite specimens were prepared to simulat…
Abstract Poly(phenylene sulfide) (PPS) is a semicrystalline engineering resin with exceptional solvent resistance and thermal performance. Properties such as these are directly related to the high crystallinity of PPS. In order to exploit its crystalline nature, PPS should be molded at a high tool temperature (hot oil…
We show that IgG molecules isolated from the serum of rabbits injected with crystals of monosodium urate monohydrate, magnesium urate octahydrate and allopurinol, can each catalyze the nucleation of the same type of crystal to which they were exposed. These results generalize previous findings related to monosodium ur…
Abstract “Surface‐photografting” with UV‐irradiation of polypropylene (PP) fiber and film and high‐strength polyethylene (HSPE) yarn has been made with acrylic acid (AA) and acrylamide (AM) as monomers and benzophenone (BP), 4‐chlorobenzophenone (4‐BCP) and hydroxylcyclohexylacetophenone (HHA) as photoinitiators using…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInclusion Polymerization within a Tris(2,3-naphthylenedioxy)cyclotriphosphazene ClathrateHarry R. Allcock, Eric N. Silverberg, Gary K. Dudley, and Shawn R. PucherCite this: Macromolecules 1994, 27, 26, 7550–7555Publication Date (Print):December 1, 1994Publication History Pub…
Abstract The physical aging behavior of nylon 66 as a function of aging temperature, magnitude of applied stress, and aging time has been investigated. Creep tests were performed for samples quenched from a stabilization temperature of 160°C to aging temperatures between 41°C and 65°C, for aging times ranging from 0.5…
Serpentinitic soils are of great ecological and environmental interest, yet pedologic studies of such soils are relatively rare, particularly concerning heavy metal solidphase speciation. This study examined the surface association and solid-phase speciation of metals, the mineralogy and the surface chemistry of serpe…
Abstract Mechanical spectrometry was performed on polystyrene/glass bead and poly (styrene‐co‐methacrylic acid)/glass bead composites to test for the influence of the interphase on molecular mobility. To quantify these motion changes, a physical model was developed to predict the deformation of amorphous materials nea…
Abstract Coexisting scapolite, biotite and hornblende in scapolite-biotite rocks from the Tongmugou Pb-Zn deposit, Qinling, northwestern China are characterized by high levels of chlorine. Scapolite composition varies from EqAn27 to EqAn47 with 47–80 wt.% Cl. The scapolite composition is a sensitive indicator of the N…
Article MERCURY COORDINATION COMPOUNDS: CLASSIFICATION AND ANALYSIS OF CRYSTALLOGRAPHICAL AND STRUCTURAL DATA was published on December 1, 1994 in the journal Main Group Metal Chemistry (volume 17, issue 11-12).
Abstract The catalyst system Nd(octanoate) 3 /Al 2 Et 3 Cl 3 /Al(iBu) 3 (Et: ethyl, iBu: isobutyl) in heptane for the polymerization of butadiene and isoprene was examined. The concentration of Al 2 Et 3 Cl 3 , Al(iBu) 3 and the order of addition of the components were varied. The results of the determination of conve…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPoly[(ether ether sulfone)-co-(ether sulfone)]/Silicon Oxide Microcomposites Produced via the Sol-Gel Reaction for TetraethylorthosilicateKenneth A. Mauritz and Redford JuCite this: Chem. Mater. 1994, 6, 12, 2269–2278Publication Date (Print):December 1, 1994Publication Histo…
Evidence for the existence of quantum size effects in amorphous diamond-like carbon superlattice structures from optical and electronic measurements together with theoretical predictions are reported. A `blue shift' in the optical gap is shown to occur with decreasing well width from which an effective mass for the el…
A Monte Carlo simulation code has been developed to describe the x-ray generation in a specimen for electron probe microanalysis (EPMA), enabling x-ray spectra observed by EPMA to be reproduced theoretically. The Monte Carlo simulation is based on the use of the Mott cross section and Bethe stopping power equation in…
Experimental solubilities are reported at 26.0°C for pyrene dissolved in twenty different organic nonelectrolyte solvents containing ether-, ester-, chloro-, hydroxy-, and methyl-functional groups. Results of these measurements, combined with our previously published pyrene solubility data in benzene, dibutyl ether, 1…
The phase behavior of diblock copolymers near the order-disorder transition is studied using transmission electron microscopy, small-angle neutron scattering (SANS) and dynamical mechanical spectroscopy. For a series of polyolefin diblocks with volume fraction, f1, of the block with the larger segment length in the ra…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCoordination Chemistry on Surfaces: A New Method To Graft Rhenium(VII) Oxide on Highly Dehydroxylated OxidesSusannah L. Scott and Jean-Marie BassetCite this: J. Am. Chem. Soc. 1994, 116, 26, 12069–12070Publication Date (Print):December 1, 1994Publication History Published on…
Cross-flow microfiltration was shown to retain Saccharomyces cerevisiae biomass utilized for heavy metal bioaccumulation. The passage of metal-laden influent through a series of sequential bioaccumulation systems allowed for further reductions in the levels of copper, cadmium, and cobalt in the final effluent than tha…