Materials Literature
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Morphology, electron structure, and catalytic activity in CO oxidation over a Au/FeO x /SiO 2 /Si(100) model sample prepared by pulsed laser deposition (PLD) have been investigated by X-ray photoelectron spectroscopy (XPS), UV photoelectron spectroscopy (UPS), and transmission electron microscopy (TEM). Two types of s…
Jute fibers in the form of slivers have been reinforced with epoxy resins to prepare composites. The solution impregnation method has been adopted in an attempt to increase the percentage of fiber loading. Both untreated (control) and chemically modified (bleached) slivers have been used to prepare composites. The opt…
An environmentally friendly processing method of polyurethane foam was proposed and evaluated for the application of thermal insulation. For the production of polyurethane foam, chlorofluorocarbon (CFC) gases were eliminated to minimize environmental destruction. Carbon dioxide gas was used as a blowing agent instead…
The nature of the substituents present on a dipyrrolide dianion ligand determines the assembly of Sm(II) clusters which participate to various extents in cluster formation and THF cleavage.
Molecular and electronic structural properties of the hydrogen-bonded complexes of p-quinone dianions (PQ(2)(-)) were investigated by electrochemistry and spectroelectrochemistry of PQ in MeCN combined with ab initio MO calculations. Hydrogen bonding between PQ(2)(-) and MeOH was measured as the continuous positive sh…
Diketopyrropyrroles (DPPs) are industrially important red pigments. The color in the solid state changes variously from vivid red to yellowish red, although no noticeable difference is recognized in the molecular spectra in solution. The correlation between the electronic and crystal structures of some DPP pigments ha…
The modification of an emulsion polymerization with a water-miscible alcohol and a hydrocarbon nonsolvent for the polymer can influence the morphology of the particles. The formation of monodispersed particles with a hollow structure or diffuse microvoids is possible. Both kinetic and thermodynamic aspects of the poly…
Confinement effects on the phase transitions in antiferromagnets are studied as a function of the surface coupling v and the surface field h for bcc(110) films. Unusual topologies for the phase diagram are attained for particular combinations of v and h. It is shown that some of the characteristics of the finite-tempe…
An analysis is given of thermoelastic noise (thermal noise due to thermoelastic dissipation) in finite sized test masses of laser interferometer gravitational-wave detectors. Finite-size effects increase the thermoelastic noise by a modest amount; for example, for the sapphire test masses tentatively planned for LIGO-…
The decomposition of pentachlorophenol (PCP) by sonication was investigated at two frequencies (20 and 500 kHz) and two concentrations (20 and 60 μM) to gain insight into the kinetics and mechanisms occurring at different frequencies. Results suggest the presence of parallel pyrolysis and OH • reaction pathways that a…
Self-assembled monolayers of ferrocene−porphyrin−C 60 triads on gold electrodes were prepared to mimic photosynthetic electron transfer events where efficient conversion of light to chemical energy takes place via the long-lived, charge-separated state with a high quantum yield. Adsorbed amounts of the triads on the g…
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…