Materials Literature
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The morphologies of U metal samples from deposits produced by electrorefining of Experimental Breeder Reactor-II (EBR-II) spent fuel were examined using scanning electron microscopy, energy- and wavelength-dispersive X-ray spectroscopy, and metallography. The morphologies were analyzed to find correlations with the ch…
Important questions concern the existence of excitonic strings in organic compounds and their signatures in the photophysics of these systems. A model in terms of hard core bosons is proposed to study this problem in one dimension. Mainly the cases with two and three particles are studied for finite and infinite latti…
A novel automated method for the optimal placement of polar hydrogens in a protein structure is presented. The algorithm adds initially, to a protein data bank file of the protein, nonrotatable hydrogens such as peptide backbone hydrogens according to geometric considerations. Then, water protons and polar side chain…
The structures of the title compounds, [Ho(C5H7O2)3(H2O)2]·H2O and [Ho(C5H7O2)3(H2O)2]·C5H8O2·2H2O, both show an eight-coordinate holmium(III) ion in a square antiprismatic configuration. The packing of these structures consists of an infinite two-dimensional network of hydrogen-bonded molecules. In both structures,…
A 12-month pilot plant study was conducted to evaluate a number of corrosion control treatments to reduce metal leaching from typical household plumbing materials. A pipe loop system was used to test six treatment options, with a control loop of the characteristically soft, acidic, Greater Vancouver Water District (GV…
A new approach to obtain imide-containing elastic polymers (IEPs) via elastic and high-molecular-weight polyureas, which were prepared from α-(4-aminobenzoyl)-ω-[(4-aminobenzoyl)oxy]-poly(oxytetramethylene) and the conventional diisocyanates such as tolylene-2,4-diisocyanate(2,4-TDI), tolylene-2,6-diisocyanate(2,6-TDI…
Under plane shock wave compression, a glass may undergo elastic deformation at the shock wave front, and fail catastrophically at a later time. Since this time delay increases with the distance into the material, the phenomenon has been interpreted as a failure wave. In this article, a new theory of failure formation…
The magnetic susceptibility and magnetization curves of an \(S=\frac{1}{2}\) trimer spin chain system Cu 3 Cl 6 (H 2 O) 2 ·2H 8 C 4 SO 2 have been measured using single crystals and polycrystals. It was found that the ground state at zero-field is a spin singlet with an excitation gap. This result suggests that the tr…
ZnO films that have been used as active layers of optically pumped lasers are investigated by a number of optical and photoelectric techniques, such as transmission, reflectivity, photoluminescence and direct and alternating photocurrents. Homogeneity with respect to “bulk” and surface properties is evaluated. The spe…
Electrolytes formed with poly(oxyethylene), POE, and europium picrate, [Eu(pic)2(OH2)6]pic.6H2O (where pic denotes the picrate anion) or simply Eu(pic)3xH2O, have been investigated by infrared and photoluminescence spectroscopies. The complexes have been represented by POEnEu(pic)3xH2O (where n represents the molar ra…
1 H-NMR, EPR and static magnetic susceptibility measurements have been performed on an organic conductor, θ-(BEDT-TTF) 2 CsZn(SCN) 4 . The 1 H-NMR- T 1 -1 and the spin susceptibility exhibit anomalous enhancements at low temperatures. Around 20 K, where the spin susceptibility shows a minimum, the principal axes of th…
Dielectric breakdown of (Pb,La)(Zr,Ti)O3(PLZT) film capacitors with Pt and SrRuO3 electrodes, in its initial or virgin state and after voltage cycling that causes polarization fatigue, is studied by constant-current measurements. It is shown that for different types of PLZT capacitors, the breakdown onset is controlle…
Coupling nanocrystals (quantum dots) to a high-$Q$ whispering gallery mode (WGM) of a silica microsphere, can produce a strong coherent interaction between the WGM and the electronic states of the dots. Shifting the resonance frequencies of the dots, for instance by placing the entire system in an electric potential,…
The Fermi surface (FS) of $2H\ensuremath{-}{\mathrm{TaSe}}_{2}$ was investigated by high resolution angle resolved photoemission. Two FS pockets, one centered at the \ensuremath{\Gamma} point and the other centered at the K point, were observed and are found to be in excellent agreement with the band calculation resul…
Second-harmonic generation, one of the second-order nonlinear optical properties of thermally and electrically poled WO>(3)-TeO>(2) glasses, has been examined. We poled glass samples with two thicknesses (0.60 and 0.86 mm) at various temperatures to explore the effects of external electric field strength and poling te…
The dilatometric curves of 21 epoxide–amine network samples made from five distinct epoxide–amine pairs, with variable amine/epoxide functional ratio values for three of these pairs, were recorded in the 200 K to Tg (glass-transition temperature) − 50 K temperature range. The curves display a quasiparabolic shape cons…
The thermal decomposition behavior of six derivatives of maleated polyethylene was investigated by high-resolution pyrolysis gas chromatography–mass spectrometry. The results revealed that substituents attached to maleated polyethylene as amides formed from secondary amines were significantly less stable than imides f…
A polymer film surface modified by laser illumination was used as a command surface for nematic liquid crystal (LC). Azobenzene-containing polyurethanes were taken for the material of the film. A relief grating inscribed by laser illumination onto the surface of these polymers induced a reorientation of the LC directo…
Droplets of Ga24Mg36Zn40 were solidified in a 3 m, helium-filled drop tube. The solidified droplets contained uniformly distributed MgZn2 dendritic primary crystals, whose number was determined as a function of droplet size. A new model for the solidification in a gas-filled drop tube was developed. It allows introduc…
An electrically heated platinum filament mounted inside a quartz tube was used as a high temperature flow reactor for methane pyrolysis. The reaction products included carbon and a mixture of hydrocarbons, mainly C1−C5 alkanes, alkenes, and benzene. The hydrocarbons were measured by gas chromatography and the carbon g…