Materials Literature
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Polarizing microscopy and optical-activity measurements are used to determine the phase diagram for the blue phases of chiral-racemic mixtures of terephthaloyloxy-bis-4-(2'-methylbutyl) benzoate. Contrary to an earlier report, it is the second blue phase (BP II) rather than the first blue phase (BP I) that is not stab…
Abstract The reduction of the emeraldine base form of polyaniline (PEM) by N , N ‐diethylhydroxylamine, sodium tetrahydroborate, sodium dithionite, and hydrazine monohydrate proceeds smoothly at room temperature to give the leucoemeraldine base form of polyaniline (PLM). The reduction of PEM to PLM with these reducing…
The DC field and pressure dependencies of the magnetic induction (B) and magnetostrictive strain ( lambda ) have been measured at room temperature in Terfenol-D (Tb/sub 0.3/Dy/sub 0.7/Fe/sub 1.95/) and in the compound Tb/sub 0.3/Dy/sub 0.7/(Fe/sub 0.9/ Al/sub 0.1/)/sub 1.95/. From these data the static differential pe…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTObservation of intermediate cuprous chloride species during the anodic dissolution of copper using atomic force microscopyJack Y. Josefowicz, Like Xie, and Gregory C. FarringtonCite this: J. Phys. Chem. 1993, 97, 46, 11995–11998Publication Date (Print):November 1, 1993Public…
The electrochemical behavior of sensitized, carburized, and mill-annealed alloy 600 (UNS N06600) was studied in hydrogenated, aerated, and high-temperature (250°C to 350°C) dilute aqueous solutions. In high-temperature water at high anodic potentials, the current density (CD) from carbide dissolution was higher than C…
The trend of increasing pattern data volume, together with decreasing critical dimensions, causes correction of proximity effect to be continually more time consuming and expensive. A tradeoff exists between speed and accuracy. A given correction method may be judged efficient if the direct computational overhead need…
A mechanism is proposed to explain electromigration-enhanced precipitate coarsening in Al-Cu alloy interconnects. The interface between the α-phase matrix and a θ-phase Al2Cu precipitate is incoherent, along which both Al and Cu atoms diffuse under an applied electric field. Depending on the relative mobility of Al an…
An amorphous sediment of charged colloidal particles in a nonaqueous solvent was prepared by centrifugation. The evolution of sediment height and volume fraction profile to equilibrium were studied with light scattering. A simple sedimentation–diffusion equation allows the experimental data to be modeled quantitativel…
Technical Briefs Shrinkage Formation During the Solidification Process in an Open Rectangular Cavity C.-J. Kim, C.-J. Kim Department of Mechanical Engineering, Seoul National University, Seoul 151-742, Korea Search for other works by this author on: This Site PubMed Google Scholar S. T. Ro S. T. Ro Department of Mecha…
The lacE and lacG genes from Streptococcus mutans have been isolated and characterized, and their nucleotide sequence has been determined. The lacE gene encodes the lactose-specific Enzyme II component of the phosphoenolpyruvate-dependent phosphotransferase system (PTS). The lacG gene encodes the phospho-beta-galactos…
Abstract Oxidation of 2,4,6-trichlorophenol (TCP) by layered manganese oxides (Na and Co-buserite) in dilute acidified aqueous suspension gives 2,6-dichloro-p-benzoquinone as a major product. This compound is likely to further polymerize and become incorporated into humuslike materials. The oxidation rate was higher a…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEmpirical many-body potential energy functions for ironFei Gao, Roy L. Johnston, and John N. MurrellCite this: J. Phys. Chem. 1993, 97, 46, 12073–12082Publication Date (Print):November 1, 1993Publication History Published online1 May 2002Published inissue 1 November 1993http…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTWhy hydrogen-bonded liquids tend to have high static dielectric constantsSaul Goldman and Chris JoslinCite this: J. Phys. Chem. 1993, 97, 47, 12349–12355Publication Date (Print):November 1, 1993Publication History Published online1 May 2002Published inissue 1 November 1993ht…
Eight glass samples in the B 2 O 3 ‐SiO 2 system with compositions from 20 to 90 mol% B 2 O 3 were prepared. The equilibrium vaporization was studied by Knudsen effusion mass spectrometry at temperatures between 1450 and 1500 K. B 2 O 3 ( g ) was the most abundant boron‐containing species in the vapor; no silicon‐cont…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThin films of a binary polymer system: poly(vinyl acetate)/poly(dimethylsiloxane) layers at the air/water interfaceFrank E. Runge and Hyuk YuCite this: Langmuir 1993, 9, 11, 3191–3199Publication Date (Print):November 1, 1993Publication History Published online1 May 2002Publi…
Abstract By means of calorimetric investigations it is shown that dithiol/diene‐mixtures show a more or less distinct spontaneous dark reaction, without light and in the absence of initiators. Pyrogallol, hydroquinone and catechol were tested as stabilizers. The efficacy of the stabilizer to transform the radicals res…
The in vivo antiviral activity of the Keggin polyoxotungstate PM-19 [K7(PTi2W10O40).6H2O] against herpes simplex virus type 2 (HSV-2) was investigated in mice immunosuppressed by cyclophosphamide (CY). When PM-19 was administered intraperitoneally to immunosuppressed mice for 3 days (once daily) starting at the time o…
In this article, the important properties and applications of shape memory polyurethanes are introduced. A number of dramatic property changes occurring at the glass transition temperature are reviewed, including elastic modulus, hardness, damping, variable vapor permeability, shape memory, and fixity. Stress-strain-t…
A systematic study of the particle size dependence of the ferroelectric domain, internal stress and dielectric constant ( K ) of BaTiO 3 powders was performed using scanning electron microscopy, X-ray diffractometer and differential scanning calorimetry. The dielectric constant of BaTiO 3 powder was lower than that of…
Paraelastic–ferroelastic phase boundaries (interfaces) are two-dimensional formations in the three-dimensional crystal lattice, which accommodate the crystal lattices of two neighbouring modifications of the same compound. Their characteristic features include both orientation and kinetic properties. Three theories ar…