Materials Literature
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The U─Zr─C tertnary phase diagram is optimized by graphical and numerical curve fitting of self‐consistent thermodynamic and phase diagram data reported in the literature. The system is described from 2473 to 3693 K using isothermal ternary phase diagrams. The solidus and liquidus curves of the U x Zr 1−x C y solid so…
We present a theoretical and experimental study on the diffraction characteristics of gratings, with particular attention focused on the effects of polarization. The goal of our study is to develop multifunctional devices for use in a pickup head for optical storage systems. Experiments and numerical calculations are…
Abstract We have performed and analyzed extensive pressure‐volume‐temperature (PVT) measurements on uncrosslinked polybutadiene and polyisoprene elastomers from ambient temperature to about 200°C and 200 MPa. In the polybutadiene series, 1,2 content varied from 8 to 87%, the remainder being similar amounts of cis‐1,4…
The structure and morphology of the corrosion products formed on the surfaces of splat quenched (SQ) Mg–16Al (wt-%) alloy specimens immersed in a 3% NaCl solution saturated with Mg(OH)2 have been studied. X-ray photoelectron spectroscopy, Rutherford backscattering spectrometry, and analytical electron microscopy of th…
The fat contents of fried batter coatings were reduced significantly (7–28%) when 1% powdered cellulose (fiber length in excess of 100 microns) was incorporated into the batter. In addition, moisture and dry material contents were increased significantly in these coatings. Although fat reductions were observed in both…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTBulky ortho 3-methoxy groups on N4O3 amine phenol ligands producing six-coordinate bis(ligand)lanthanide complex cations [Ln(H3L)2]3+ (Ln = Pr, Gd; H3L = tris(((2-hydroxy-3-methoxybenzyl)amino)ethyl)amine)Shuang Liu, Li Wei Yang, Steven J. Rettig, and Chris OrvigCite this: I…
Antimony-doped tin oxide films were deposited by spray pyrolysis technique. The effect of antimony doping on structural and electrical properties was investigated in detail using the x-ray diffraction technique and room-temperature Hall measurements. Antimony doping did not affect the preferred growth along [200] to a…
Bioassay-directed fractionation of the MeCOEt extract of Porella cordeana yielded drimenin [1] and aristolone [4], which were moderately toxic towards DNA-repair-deficient mutants of Saccharomyces cerevisiae. Three inactive sesquiterpenes, 7-ketoisodrimenin [2], 7-ketoisodrimenin-5-ene [3], and norpinguisanolide, were…
The helium-decorated In-vacancy complex In${\mathit{V}}_{2}$${\mathrm{He}}_{\mathit{n}}$ in tungsten was studied with the aid of the perturbed-angular-correlation technique, using $^{111}\mathrm{In}$ as a probe. The release steps In${\mathit{V}}_{2}$${\mathrm{He}}_{\mathit{n}}$\ensuremath{\rightarrow}In${\mathit{V}}_{…
The high-pressure synthesis and electric and magnetic properties of the ${\mathrm{LaCuO}}_{3\mathrm{\ensuremath{-}}\mathrm{\ensuremath{\delta}}}$ system have been studied. The copper valence can be varied in this oxygen-defect perovskite almost continuously from +3 to +2, and three distinct ordered phases are observed…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSurface activity of a boron nitride powder: a vibrational studyM. I. Baraton, T. Merle, P. Quintard, and V. LorenzelliCite this: Langmuir 1993, 9, 6, 1486–1491Publication Date (Print):June 1, 1993Publication History Published online1 May 2002Published inissue 1 June 1993http…
The principle of equilibrium potential‐pH diagrams for two‐dimensional species adsorbed on metals 3 is applied to the case of sulfur and oxygen adsorbed on nickel in water. Standard Gibbs energies of formation for sulfur and oxygen adsorbed on nickel are calculated from literature thermodynamic data for chemisorption…
Abstract Differential charging (DC) is a charging effect in x‐ray photoelectron spectroscopy (XPS or ESCA) that results from the spatial variation of sample potentials in the XPS sampling volume. It can be conceptually categorized into two different aspects—lateral (LDC) and vertical (VDC)—according to the difference…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHydrothermal synthesis and characterization of hexavanadium polyoxo alkoxide anion clusters: crystal structures of the vanadium(IV) species Ba[V6O7(OH)3{(OCH2)3CCH3}3].3H2O and Na2[V6O7{(OCH2)3CCH2CH3}4], of the mixed-valence complex (Me3NH)[VIV5VVO7(OH)3{(OCH2)3CCH3}3], and…
Abstract The chemistry of smectites from some bentonite deposits derived from intermediate rocks has been examined by electron microprobe methods. A large variation in chemical composition within very short distances, principally controlled by a well-defined negative relationship between Si and A1, and between A1 VI a…
The aim of studying the encapsulation of 2-amino-5-nitropyridinium cations in (HSO 4 - ) n and (H 2 AsO 4 - ) n polymeric host matrices is to build acentric frameworks that are efficient for quadratic nonlinear optical applications. Evidence is given for the role of inorganic polyanions in the formation of polar packi…
Abstract The full structure of dickite from St. Claire, Pennsylvania, including hydrogen atoms, was refined in space group Cc using time-of-flight neutron powder diffraction data obtained at 12 K and Rietveld refinement/difference-Fourier methods (R wp = 2.62%, reduced χ 2 = 1.915, 113 variables, a = 5.1474(6)Å, b = 8…
Measurements of X-ray diffraction patterns of high- T c superconductor and tungsten–carbide powder samples using a Bragg–Brentano diffractometer showed systematic variations of the intensities for different preparation conditions. For specimens with high surface roughness, an angle-dependent decrease of the intensitie…
The thiourea group of sulfur compounds has important theoretical and practical applications. Thioureas have been studied extensively, but their inhibition mechanism is not fully understood. The effect of thiourea; allylthiourea; N,N´-diethylthiourea; N,N´-di-isopropylthiourea; phenylthiourea; thiocarbanilide; and symd…
We present a two-sublattice Ising-type model, involving one intramolecular interaction treated rigorously and intermolecular interactions treated in the mean-field approach, in order to describe the two-step transition exhibited by a bi-nuclear spin-crossover complex. Spontaneous symmetry breakings can be obtained acc…