Materials Literature
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As found from previous studies, a Gaussian curve describes the swelling by various liquids of a series of nitrile rubbers containing from 0 to 50% bound acrylonitrile. The curves pass through a maximum at a value, A. While not without their shortcomings, the swelling curves do present a fairly accurate picture of how…
CO/sub 2/-laser-induced photovoltaic and photoconductive effects have been studied experimentally in silicon junctions. The response is slightly nonlinear or linear for the lower excitation intensities used, in opposition to the extremely nonlinear high-excitation-intensity regime. Abrupt changes in the slope of the g…
Raman spectra from o-terphenyl sealed in glass capillary tubes were acquired over temperatures ranging from 233 K to 343 K. Over this temperature range, o-terphenyl can exist in the solid-crystalline, molten, supercooled-liquid, and amorphous-glassy states. Representative structure-sensitive spectra are presented alon…
Tetra-4-pyridylporphyrin (TPyP) derivatives of Ga(III), In(III) and Tl(III) have been prepared and isolated as acetate salts. In(III)TPyP and Ga(III)TPyP have been characterized by FABMS, and the 1H-NMR, UV-visible and fluorescence spectra have been recorded for all complexes.
It has been clarified for the first time that the light scattering profile of amorphous matter, e.g ., polymethylmethacrylate (PMMA) and quartz glass, in the glassy state displays two aspects in precise light scattering measurements in which optical resolution power is enhanced for a scattering angle. One aspect is of…
The chalcogenide alloys AsSGe have been prepared by a melt-quenching method and their density, microstructure and ultrasonic longitudinal sound velocity have been investigated at 15 MHz. The longitudinal modulus was calculated and its dependence on the composition and mean atomic coordination number, r, found. It is…
Abstract The analytic expressions for the five elastic constants of an h. c. p. lattice are deduced. These expressions are appropriate for fitting empirical many‐body interatomic potentials of the embedded atom type. The uniform deformation method is used together with the lattice symmetry properties. These greatly si…
The mixed-oxide (MOX) fuel of the current generation (MIMAS) is confronted with the challenge of reaching the same quality and reliability as UO2 fuel, while the related data base accumulated so far is still limited. Its in-reactor behavior, therefore, has been assessed based on the lessons from previous generations o…
The structure of lovozerite is derived from perovskite. For 24 members of the lovozerite family an aristotype is postulated. The method of quantitative comparison using the concept of mappings is applied to the lovozerite family using the aristotype as a «structural unit». The method is extended to relationships of sy…
The adsorption of on transition metal electrodes was characterized by means of pseudocapacity measurements. It turned out that the metal with high pseudocapacity in solutions are promising electrocatalysts for the electrochemical reduction of . A correlation was found between the electronic structure of transition met…
Protein concentrations in three aquacultural recirculation systems and protein removal by foam fractionation were investigated. The results revealed that protein concentrations ranged from less than 1 to 127 mg/L in the systems tested and averaged about 4% of the concentrations of total volatile solids. These proteins…
A method is developed for the extraction, from SQUID magnetometer data, of a value for the total magnetic moment of an extended sample. Background drift associated with the superconducting magnet is usually a serious problem in these experiments and the authors show, using computer simulations, that their method deals…
The photofission and photoneutron cross sections of Pu-239 have been measured by using monochromatic and discrete photons produced by thermal neutron capture gamma rays in several targets placed at the core of the IEA-R1 reactor in the energy interval from 5.43 MeV to 9.72 MeV. Analysing the photofission and photoneut…
Abstract Thiolate-bridged dinuclear nickel(II) complexes with N-[2-(2-pyridyl)ethyl]-N-[2-(methylthio)ethyl]-2-aminoethanethiol (HLa) or N-[2-(2-pyridyl)ethyl]-N-[2-(ethylthio)ethyl]-2-aminoethanethiol (HLb), [Ni2(La)2](ClO4)2 (1) and [Ni2(Lb)2](ClO4)2 (2), have been synthesized and characterized by elemental analyses…
We clarify the local structure in a model silicon glass by use of Voronoi-polyhedron analysis. The glass is produced by molecular dynamics with a Stillinger-Weber potential. The atoms in the glass are nearly distinguishable: there are about 200 types in the system with 216 atoms. The analysis clarifies that the polyhe…
The liquid-to-solid transition of the alkane-continuous phase of a dilute surfactant-stabilized particle or droplet dispersion can be induced in a reversible manner without destabilizing the colloid by pressure and/or temperature changes. The structural changes have been studied by small-angle neutron scattering (SANS…
The temperature dependence of the optical properties for amorphous silicon is studied at wavelengths of 632.8 and 752 nm. Both the refractive index and extinction coefficient increase linearly with temperature for 752 nm, while the refractive index decreases and the extinction coefficient increases for 632.8 nm. The r…
It is known from crystallographic investigations that there are two distinct Pt–S modifications, PtS and PtS2 [see R. Collins, R. Kaner, P. Russo, A. Wold, and D. Avignant, Inorg. Chem. 18, 727 (1979); A. Finley, D. Schleich, J. Ackerman, S. Soled, and A. Wold, Mater. Res. Bull. 9, 1655 (1974); S. Soled, A. Wold, and…
Polyominoes will delight not only students and teachers of mathematics at all levels, but will be appreciated by anyone who likes a good geometric challenge. There are no prerequisites. If you like jigsaw puzzles, or if you hate jigsaw puzzles but have ever wondered about the pattern of some floor tiling, there is muc…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhotophysics of lithium phthalocyanines and their radicalsSylvain L. Gilat and Thomas W. EbbesenCite this: J. Phys. Chem. 1993, 97, 14, 3551–3554Publication Date (Print):April 1, 1993Publication History Published online1 May 2002Published inissue 1 April 1993https://pubs.acs…