Materials Literature
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An extension of the concept of response reactions (RERs) is presented that allows the generation of thermochemical data from group additivity (GA) and ab initio methods using precisely the same stoichiometric and mathematical procedures. This goal is achieved by (i) reformulating the ordinary least squares (OLS) analy…
MgO-C-Al refractory is representative of the carbon-containing refractory. Al metal has been widely used as an antioxidant. However, since it has some defects, development of new antioxidant is desired due to adverse effects by reaction products. This paper describes a new family of antioxidants such as Al{sub 4}O{sub…
The relationship between the impulse breakdown voltage of vacuum gaps and electrode surface roughness was investigated for the purpose of controlling the surface roughness on HV conductors. The roughness of mechanically polished Cu and Cu-Cr electrodes was measured with a roughness meter, and the relationship between…
The prpB gene of Salmonella enterica serovar Typhimurium LT2 encodes a protein with 2-methylisocitrate (2-MIC) lyase activity, which cleaves 2-MIC into pyruvate and succinate during the conversion of propionate to pyruvate via the 2-methylcitric acid cycle. This paper reports the isolation and kinetic characterization…
A new form of time-resolved multiphoton-excited fluorescence imaging is described and used to study electric-field-induced reorientation dynamics in polymer-dispersed liquid crystal (LC) films. This method provides information on the static and dynamic LC orientation via polarization-dependent three-photon excitation…
Laser Raman studies on two compounds of the α,ω-bis(4-alkylanilinebenzylidene -4′-oxy)alkane series were carried out in the spectral regions 1140–1220 and 1550–1650 cm-1 as a function of temperature. Compounds 7.O4O.7 and 7.O5O.7, exhibit SmA and SmF phases. The structural differences between these liquid crystal dime…
Abstract Computer simulations have been performed for electric field induced parallel‐perpendicular lamellar phase transition in the presence of electrodes. The simulations are based on the dynamic density functional theory. Here we provide the extension of earlier work in two dimensions (2D) to three dimensions (3D).…
The electrochemical behavior of tin polycrystals in borate buffer solutions at pH 7.5 was systematically investigated using cyclic voltammetry, EC-STM and electrochemical impedance measurements. A systematic shift to more negative values of the potentials corresponding either to the major reduction peak either to the…
The quantitative analysis of binary polyethylene (PE) blends by Fourier transform infrared (FT-IR) spectroscopy has been achieved based on the ratio of two absorbance peaks in an FT-IR spectrum. The frequencies for the absorbance ratio are selected based on structural entities of the PE components in the blend. A line…
Abstract The influence of tin and lead additives on the catalytic activity of platinum particles dispersed on a poly(3,4‐dioxyethylenethiophene) (PEDT) layer deposited on gold or steel towards anodic oxidation of methanol and ethanol was studied. It was found that these additives increase the rate of anodic oxidation…
The solidification structure of any casting has a marked influence on its final microstructure and properties. Nevertheless, the correlation between solidification structure, microstructure and properties has not been clearly established for ductile irons.The objective of this investigation is to study the influence o…
Une variete de vesuvianite deficitaire en Si, formee a basse temperature, fait partie d'un amas tetraedrique de hibschite forme par pseudomorphose (achtarandite) le long des rives de la riviere Wiluy, en Yakoutie, Russie, la localite-type du grossulaire et de la wiluite. La substitution de (H 4 O 4 ) 4 - au (SiO 4 ) 4…
The paper presents the results of a study on the effect of shed design on the aging performance of silicone rubber (SIR) insulators in salt-fog. The experiments on a single shed design at 35 V/mm average stress and 0.25 S/m salt-fog conductivity level are reported. Shed diameter, location and inclination angle are the…
The corrosion behavior of iron and AISI 304 stainless steel in aqueous tungstate solutions containing chloride ion was investigated by cyclic voltammetry, open circuit measurements and impedance spectroscopy. The obtained results point out that the inhibitive performance of tungstate depends on the presence of dissolv…
Abstract A new Au11 cluster with (m-CF3C6H4)3P ligands has been synthesized and characterized by single crystal X-ray and XPS analysis. The cluster has an incomplete icosahedral skeleton similar to known Au11X3(PR3)7 clusters, but a stronger distortion from the ideal symmetry has been caused by introducing CF3 substit…
Summary The aqueous dissolution of synthetic brannerite (UTi 2 O 6 ) in an open atmosphere has been investigated. Previous data in the literature have been combined with new experimental work, dealing with the release of uranium from brannerite as a function of solution pH and aqueous carbonate species, in oxygenated…
Abstract Carbon black (CB) nanoparticles were encapsulated by poly(vinyl alcohol) (PVA) by a simple method of coacervation. Transmission electron microscopy (TEM) images clearly demonstrated that the successful encapsulation of PVA happened at the surfaces of CB nanoparticles. The particle‐size distribution measuremen…
A solid state diffusion method for the preparation of (K2 : Dy)Mg2(SO4)3 and (K2 : Dy,P)Mg2(SO4)3 phosphors is reported. Thermoluminescence (TL) and mechanoluminescence (ML) characteristics are studied. TL, shown by the (K2 : Dy,P)Mg2(SO4)3 phosphor is 60% as intense as the conventional CaSO4 : Dy phosphor used in the…
Abstract Lattice Monte Carlo simulations of conformations of hereroarm star copolymers A n B n in selective solvents were performed using a special variant of the Siepman and Frenkel algorithm. The effects of solvent quality, the number and lengths of blocks on the collapse of the insoluble block A, segregation of the…
This paper looks at the propagation characteristics of UHF signals in transformers for locating partial discharge sources