Materials Literature
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Abstract The finding that dispersions of insulators such as alumina or silica in ionic conductors may exhibit considerably enhanced ionic conductivities compared to the pure material, has become a promising topic for optimizing the electric properties in solid state research. Up to now the basic mechanism for this eff…
The binding of metal ions from salts and from corrosion products of 316 LVM stainless steel and MP-35 to blood cells and serum proteins was studied in vitro. In the first series of experiments, metal salts were added to whole blood and then the blood separated into red cells, white cells, and serum. Nickel from nickel…
Tensile experiments on polypropylene and various rubber-modified polypropylenes, conducted over a wide range of temperatures and strain rates, have shown that the ductile–brittle transition in these highly crystalline polymers is strongly affected by both temperature and strain rate. Such polymers can either craze or…
The neutron powder profile refinement technique has been used to determine the crystal structure of solid Br2 at 5, 80, 170 and 250 K and that of solid Cl2 at 22, 55, 100 and 160 K. The results confirm that the structures of the two halogens are isomorphous, with space group Cmca at all temperatures. For both halogens…
In this paper we show that although in one dimension multiplicity of solutions to the phase reconstruction problem presents a serious problem, in two or more dimensions multiplicity is pathologically rare. We derive from a given solution pair (g,G) necessary conditions for the existence of alternative solution pairs (…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA formulation of the short-range repulsion between spherical colloidal particlesDonald L. Feke, Naresh D. Prabhu, J. Adin Mann Jr., and J. Adin Mann IIICite this: J. Phys. Chem. 1984, 88, 23, 5735–5739Publication Date (Print):November 1, 1984Publication History Published onl…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTVibrational spectroscopic study of the interlamellar kaolinite-dimethyl sulfoxide complexClifford T. Johnston, Garrison Sposito, David F. Bocian, and Robert R. BirgeCite this: J. Phys. Chem. 1984, 88, 24, 5959–5964Publication Date (Print):November 1, 1984Publication History…
This review describes the utilisation of synchrotron X-radiation (SR) in protein crystallography. For the general reader a brief discussion is given of the basics of protein structure analysis including an outline of the problems of sample radiation damage, the inherent weakness of individual reflections and the large…
Complex anisotropic media can generally be described by a6 \times 6macroscopic constitutive tensor\hat{C}. Using\hat{C}properties, a reaction integral formula is derived from which an anisotropic reaction theorem (modified reciprocity theorem) is developed. Reduction of the\hat{C}medium into a reciprocal medium is dis…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhotoluminescence of zinc oxide powder as a probe of electron-hole surface processesMasakazu Anpo and Yutaka KubokawaCite this: J. Phys. Chem. 1984, 88, 23, 5556–5560Publication Date (Print):November 1, 1984Publication History Published online1 May 2002Published inissue 1 No…
The fatigue behaviour of Ti-6Al-4V (extra low interstital) alloy coated with Ti-6Al-4V powder was investigated using rotating bending fatigue testing. It was found that the high cycle fatigue strength of porous coated specimens exhibited a substantial decrease compared to uncoated specimens of the same microstructure.…
Chemically vapor deposited (CVD) silicon carbide was subjected to constant compressive stresses (110 to 220 MN/m 2 ) at high temperatures (1848 to 2023 K) in order to determine the controlling steady‐state creep mechanisms under these conditions. An extensive TEM study was also conducted to facilitate this determinati…
The organic matrix is thought to play an important role in controlling crystal growth during the formation of skeletal hard parts. The structural organization of the matrix macromolecular constituents can provide a key to understanding the nature of the control processes. Although the data are limited, both vertebrate…
X-ray studies on human insulins prepared by semisynthetic and biosynthetic methods have recently been undertaken. Human insulin differs from porcine insulin only at the COOH terminus of the B-chain. The present study reports the crystal structure of 4-zinc human insulin, which is used clinically as a slow-acting prepa…
The cylinder model, used previously to analyze the viscous sintering of flame hydrolysis preforms and gels, is shown to be consistent with other models of early‐ and late‐stage sintering. The model is then applied to a bimodal pore‐size distribution in which the different shrinkage rates of small and large pores produ…
The temperature dependence of electrical conductivities In WO3-x (O ≤ x ≤ 0·28) has been investigated. These compounds show metallic behaviour for x < 0·10 and non-metallic behaviour for x < 0·10. An Anderson transition takes place for the composition WO2·90 with complete polaronic transport in the non-metallic phase.…
A theoretical evaluation for Peek's law which yields the corona onset gradient is made in air for positive wire/cylinder and positive point/plane geometries. The physical and geometrical parameters used in Meek's criterion take into account the variation of apparent ionization coefficient λ1of air with humidity, press…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTrisubstituted heteropolytungstates as soluble metal oxide analogs. 1. The preparation, characterization, and reactions of organic solvent soluble forms of the silicon-niobium heteropolytungstates Si2W18Nb6O778-, SiW9Nb3O407-, and the SiW9Nb3O407- supported organometallic co…
ABSTRACT A bilayer film consisting of stearic and palmitic acids as one layer and hydroxypropyl methylcellulose as the other was prepared. The permeability of this film to water vapor was tested under a variety of conditions involving film composition, temperature and relative humidity. This film exhibited permeabilit…
ABSTRACT Edible films composed of a water soluble, carbohydrate layer (hydroxypropyl methylcellulose) and various kinds of lipid layers were tested for resistance to water vapor permeability. Films were tested at 25°C and a relative humidity differential of 85%. Films containing solid lipids, such as beeswax, paraffin…