Materials Literature
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The formation of Ni surface precipitates on natural soil materials may occur during sorption under ambient environmental conditions. In this study, we examined proton‐ and ligand‐promoted dissolution of Ni surface precipitates on pyrophyllite, talc, gibbsite, amorphous silica, and a mixture of gibbsite and amorphous s…
We report the orientations of thermotropic liquid crystals to be coupled through dipolar interactions to the electric fields of electrical double layers that form upon contact of the liquid crystals with model surfaces presenting sodium carboxylate salts. The surfaces were prepared by the self-assembly of HOOC(CH 2 )…
Indium tin oxide (ITO) thin films were deposited on polymeric substrates at room temperature by dc reactive magnetron sputtering from an In–Sn (90–10 wt%) alloy target. The electrical, optical, and mechanical properties of ITO films on various substrates such as polycarbonate, acrylic, polyethylene terephthalate, and…
A wide variety of polymer nanocomposites exhibiting novel property combinations were obtained via in-situ formation of silicate nanofillers during polymerization and processing. Key intermediates were tailor-made silicates which were renderer organophilic by means of cation exchange and exfoliated upon applying shear…
p -type antimony telluride thin films and n-type bismuth telluride thin films have been deposited by coevaporation on glass substrates. The conditions for deposition have been investigated as a function of substrate temperature (Ts), flux ratio (Fr=F(Te)/F(Sb, Bi)) and optimized to achieve a high thermoelectric power…
A new formula aimed at calculating ohmic losses in switch-mode power supply (SMPS) transformers is presented. It is based on intensive two-dimensional (2-D) finite element method (FEM) simulations, the results of which have been summarized in a closed-form formula following a "semi-empirical" approach. The main benefi…
Previously we have shown how to obtain the electric properties of a polymer or other periodic system at the coupled Hartree–Fock level by direct, analytical calculation rather than by extrapolation of oligomer results. Here we add computationally simpler noniterative formulas and test the methodology for the longitudi…
In silicon and other materials with a high Peierls potential. dislocation motion takes place by nucleation and propagation of kink pairs. The rates of these unit processes are complex unknown functions of interatomic interactions in the dislocation core, stress and temperature. This work is an attempt to develop a qua…
The genus Saccharothrix is phylogenetically heterogeneous on the basis of analysis of almost complete 16S rDNA sequences. An evaluation of chemotaxonomic, morphological and physiological properties in the light of the molecular phylogeny data revealed that several species are misclassified. Saccharothrix aerocolonigen…
The transformation kinetics and microstructures of glass‐ceramics, which deviate from those of a stoichiometric cordierite compound, are greatly dependent on the compositions of the starting glasses. Compositions richer in (MgO,SiO 2 ) than the stoichiometric cordierite compound suppress the formation of μ‐cordierite,…
Low-frequency (100 Hz-1 MHz) dielectric studies of the AgNb 1- x Ta x O 3 (ATN) (0⩽ x ⩽0.4), Ag 1- x K x NbO 3 (AKN) (0⩽ x ⩽0.04), Ag 1- x Li x NbO 3 (ALN) (0⩽ x ⩽0.04) and Ag 1- x Na x NbO 3 (ANN) (0⩽ x ⩽0.4) solid solution ceramics were carried out in the temperature range 120-700 K. The dielectric dispersion was on…
MyristoylCoA:protein N-myristoyltransferase (Nmt) attaches myristate to the N-terminal Gly residue of proteins involved in a variety of signal transduction cascades, and other critical cellular functions. To gain insight about the structural basis of substrate recognition and catalysis, we determined the structures of…
In the present work, additions of 2% vanadium, 2% niobium and 2% titanium were respectively made to a high-chromium white iron (17% Cr) to analyse the effect of these elements on the as-cast structure of the alloy, and their influence on the material's hardness. This study was carried out for different solidification…
Decrease in luminous intensity of multibubble sonoluminescence (MBSL) at excessive ultrasonic intensity is studied in connection with the behavior of cavitation bubbles. The intensity of MBSL from aerated distilled water in a rectangular vessel with six transducers, in which a standing wave field was established, was…
Thin semiconducting thermoelectric films with narrow energy band gaps are considered to be very promising for future microdevice applications (sensors and generators). The polycrystalline BiSbTe alloys (V–VI semiconductors) are examples. In this report, the detailed temperature dependence of electrical resistivity [ρ(…
Effect of retained austenite on the corrosion performance of modified 13% Cr martensitic stainless steel (0.025%C-13%Cr-[4% to 6%]Ni-[1% to 2%]Mo) seamless pipe is investigated. Retained austenite in the modified 13% Cr steel pipe was formed in the tempering period and its volume was affected by tempering temperature.…
In 1998 Siemens AG (SAG) took over the tubular Solid Oxide Fuel Cell (SOFC) technology from Westinghouse. This merger placed SAG under the responsibility of Siemens Westinghouse Power Corporation (SWPC), and gave them the opportunity to concentrate on this technology as the most promising fuel cell option for the emer…
Standard EXAFS analysis on Ce x Zr 1 - x O 2 mixed oxides leads to incorrect structural parameters. A comparison of XRD Rietveld analysis with an EXAFS study of a Y-doped reference compound and a Ce 0.5 Zr 0.5 O 2 catalyst showed that in order to obtain reliable structural parameters with EXAFS an anharmonic pair dist…
We report a polarization beam splitter that uses polarization gratings written onto a zero-twist nematic liquid-crystal display. We show three configurations. The first two separate the diffracted light into two orthogonally polarized orders that are either linearly or circularly polarized. In the third configuration,…
In the framework of the Peierls model generalized to two dimensions the dissociation of a dislocation in the {111} plane of a fcc lattice into two Shockley partials is studied by a variational procedure. Each partial is made up by a distribution of infinitesimal dislocations with a density obtained by a superposition…