Materials Literature
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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…
This paper attempts to examine the utility potential of polymeric electro-optic devices for applications in optical telecommunication, switching and signal processing. A preliminary study reveals that there exists a great deal of potential in the polymeric devices for applications that require high bandwidth, low loss…
A study of the flashover mechanism initiated by metallic particles in SF/sub 6/ gas is presented. Using a high-speed Imacon photographic camera, it was established that a metallic particle near the insulator surface plays an important role in flashover development. The influence of the particle on flashover developmen…
Landau theory provides a group-theoretical method for determining which symmetry changes can occur in second-order phase transitions in solids. The irreducible representations of the space group of the higher-symmetry phase must satisfy certain conditions. For transitions to commensurate crystalline structures, the La…
Abstract Steady shear viscosity and ionic conductivity have been measured for nine commercial diglycidyl ether of bisphenol‐A (DGEBA) epoxy resins with molecular weights ranging from 340 to 14,200. The temperature dependence of viscosity and ionic conductivity was modeled using free volume viscosity and ionic conducti…
The pad‐dry‐steam and pad‐dry‐bake finishing of tussah silk fabric with triglycidyl ether of glycerol in the presence of catalysts has been investigated. Potassium thiocyanate was found to be the most effective accelerating agent for this purpose. The optimum treatment conditions for either steaming or baking are disc…
Abstract Using various cellulose samples, the conditions of cellulose dissolution in N,N‐dimethylformamide with added lithium chloride were established. The way of activation of cellulose influences decisively the dissolution. Complete dissolution of microcrystalline cellulose can only be achieved after treating with…