Materials Literature
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Photoinduced magnetization was observed in a Prussian blue analog, K0.2Co1.4- [Fe(CN)6]·6.9H2O. An increase in the critical temperature from 16 to 19 kelvin was observed as a result of red light illumination. Moreover, the magnetization in the ferrimagnetic region below 16 kelvin was substantially increased aft…
Changes in free energy, enthalpy, and entropy were determined for sorption (desorption and adsorption) of water in wood. Findings were that changes are different for desorption and adsorption, have a strong dependence on moisture content, and have a weak dependence on temperature. Suggestive explanations are given for…
Radical copolymerization of styrene and maleic anhydride have been carried out in N, N-dimethylformamide at 60°C using 2,2′-azobisisobutyronitrile as initiator. The copolymer compositions were determined using an aqueous conductometric direct titration method. Monomer reactivity ratios were calculated by Fineman-Ross,…
In an effort to understand interparticle charge transfer processes, the authors study the effect of TiO{sub 2} particles in the vicinity of CdS particles on the emission from the latter. Quantum-size CdS particles were capped with the bifunctional bridging molecules mercaptocarboxylic acids (HS-(CH{sub 2}){sub n}-CO{s…
The mandated switch from CFC-11 (trichlorofluoromethane) to HCFC-141b (1,1-dichloro-1-fluoroethane) as a blowing agent for polyisocyanurate insulation foams has required producers of these foams to make numerous formulation changes. The changes have been warranted due to the differing physical properties of HCFC-141b…
The crystallographic databases are powerful and cost-effective tools for solving materials identification problems, both individually and in combination. Examples of the conventional and unconventional use of the databases in solving practical problems involving organic, coordination, and inorganic compounds are provi…
In this paper, an equivalent network model for transformer analysis including hysteretic effects is presented. The nonlinear electromagnetic problem is reduced to the analysis of an equivalent network by integrating Ohm's law inside every elementary volume into which the solid bodies of the examined system are subdivi…
RATIONALE AND OBJECTIVES: The authors investigate the frequency of sister chromatid exchange (SCE) after the addition of gadolinium (Gd)-DTPA to venous blood samples. METHODS: Venous blood was obtained from nonsmokers. Samples were incubated with Gd-DTPA alone or in combination with mitomycin C, cytarabine, and dimeth…
The structural modifications and orientational ordering of nematic (SCB) droplets with the bipolar director-field configuration, embedded in a uniaxially stretched polyvinyl alcohol (PVA) matrix, are studied using polarized optical microscopy. It has been found that the unidirectional ordering of droplets with stretch…
Grain boundary diffusion of Cr in [10]/[112] symmetrical bcc bicrystals of Nb has been investigated in the temperature range from 950 to 1197°C with tilt angles, θ, from 2 to 21°. For 0·17°, the activation energy is independent of θ, with an average value of 181-2kJ mol−1, which is about half of the activation energy…
A void‐free SiO 2 interlayer dielectric film formation technology has been developed. This technology utilizes tetraethylorthosilicate [TEOS, Si ( OC 2 H 5 ) 4 ]/ozone ( O 3 ) atmospheric pressure chemical vapor deposition (APCVD) SiO 2 film gap‐filling, and the TEOS‐based dual frequency plasma enhanced vapor depositi…
Abstract Relaxation of pulsed photocurrents under optical bias is studied in amorphous films of ternary glassy alloys As 2 Se 3 :Sn x ( x = 0 to 3.5 at%) and (1− y )(As 2 S 3 ): y (Sb 2 S 3 ) ( y = 0 to 0.55) by the time‐of‐flight technique. In the frame of a multiple‐trapping model it is shown that by adding tin and…
In order to conduct valid epidemiological studies of nuclear power plant workers, good information on the workers' radiation dose histories is essential. Dose records held by a major dosimetry service company and on the Nuclear Regulatory Commission's Radiation Exposure Information and Recording System have been compa…
A peculiar step-growth (cationic) polymerization of bis(p-vinylphenyl) ether (BVPE) in nonpolar or slightly polar aromatic solvents in the temperature range from 70 to 150°C in the presence of 2.5–5.0 mmol/L of p-toluenesulfonic acid has been studied. Optimum polymerization conditions were found. New linear unsaturate…
We study volume stability of Voronoi polyhedra under hydrostatic pressures in a sodium glass. We optimize the atom positions under the pressures by an ab initio molecular dynamics method with an orbital-free density functional. The number of atoms in the supercell is 128. The change of the volumes is insensitive to pr…
The effect of duty cycle of pulsed dc currents on the critical length-current density product, (jl/sub c/), was measured using the Blech-Kinsbron edge-displacement technique [Thin Solid Films 25, 327 (1975)]. Unencapsulated Al edge-displacement segments mere stressed at various duty cycles and the critical lengths, th…
Computer analysis of the field emission from multilayered cathodes of Si–SiO2–Si [quantum well (QW)]–SiO2 for different system parameters (the thicknesses of the SiO2 insulator and QW layers, carrier concentration in the substrate, crystal orientation, etc.) has shown that a well pronounced peak on the Fowler–Nordheim…
The marine planktonic diatom Rhizosolenia robusta Norman is widely distributed in tropical and subtropical areas and occurs occasionally in more temperate ones. Traditionally it has been considered a species of the genus Rhizosolenia, but its taxonomic status has not been reviewed. The present study is based on light…
Abstract Clay liners have been widely used to contain toxic and hazardous waste materials. Clays absorb contaminant cations due to their exchange capacity. To improve the performance of the clay liner, fly ash, a waste material arising from the combustion of coal has been studied as a pre-filter material. In particula…
The effect of filler content and size on the mechanical properties of a new type of wood-based filler, oil palm wood flour (OPWF), in polypropylene (PP) was investigated. Four sizes of OPWF filler at different filler loadings were compounded using a twin screw compounder. All sizes of filler showed a similar trend of…