Materials Literature
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Article on high-temperature fast-flow reactor kinetics studies of the reactions of aluminum with chlorine, aluminum with hydrogen chloride and aluminum monochloride with chlorine over wide temperature ranges.
Isothermal oxidation tests of Zircaloy-4 have been performed in steam/argon mixtures at the temperatures of 1,000–1,490°C to study the oxidation behavior of fuel cladding under severe accident condition in LWRs. The change in mass increase of oxidized specimens was related to the concentration of steam in the atmosphe…
Being the graft of choice, the internal mammary artery (IMA) is increasingly used for coronary artery bypass grafting. Presently, electrocautery is liberally used to mobilize both IMAs. Preservation of IMA flow surface was evaluated by scanning electron microscopy (SEM) after mobilization with either sharp dissection…
Transmission electron microscopy in situ weak-beam investigations have been made on superdislocation cores in Co74Ni3Ti23 single crystals deformed at room temperature. Contrast experiments using [220] reflections show that a core transition of superdislocations from superlattice intrinsic stacking fault dissociation i…
The H 2 O‐catalyzed sintering of MgO in temperature gradients between 1303 and 1233 K is compared to sintering of isothermal samples. Both the changes in sample dimensions in planes normal to the temperature gradients and the increases in density for a fixed sintering time are greater than predicted on the assumption…
The relationship between patterning characteristics and other (such as microstructural and electroptical) characteristics which depend on sputtering conditions, especially the substrate temperature and oxygen partial pressure, was investigated in ITO films prepared by the rf magnetron sputtering method. Sputtering con…
Illite is shown to be dominating the clay fractions of some aridic soils, while being nearly absent in many others. Water extract compositions from aridic soils suggest solutions in equilibrium with mixed layers of illite/smectite. Illite is considered to be a stable clay mineral in the aridic pedoenvironment. Concent…
Abstract The weathering products of primary biotite, chlorite, magnetite, and almandine in mica gneiss and schist in the North Carolina Blue Ridge Front were determined. Sand-size grains of biotite, the most abundant, readily weathered mineral in the parent rock, have altered to interstratified biotite/vermiculite, ve…
A ray representing a vector wave is traced through an optical system. The electric field perpendicular to the (ray) direction of propagation is represented by a Jones vector. At each surface the results of a thin-film calculation are used to form a "surface" Jones matrix. For a given ray, a product of surface Jones ma…
The effect of Al 2 O 3 and (Ti or Si)C additions on various properties of a (Y)TZP (yttria‐stabilized tetragonal zirconia polycrystal)–Al 2 O 3 –(Ti or Si)C ternary composite ceramic were investigated for developing a zirconia‐based ceramic stronger than SiC at high temperatures. Adding Al 2 O 3 to (Y)TZP improved tra…
Chemical analysis of ‘voidites’ in diamond reveals only nitrogen, whereas similar analysis of ‘platelets’ shows no detectable nitrogen. The method of analysis is electron energy-loss spectroscopy in a dedicated scanning transmission electron microscope. The voidite size ranges from 2 to 5 nm. The results suggest that…
Malonyl-CoA decarboxylase was purified from goose uropygial gland, reduced, carboxymethylated, and digested with trypsin. Several peptides were purified by high performance liquid chromatography and their amino acid sequences determined. Oligonucleotide probes were prepared based on their amino acid sequences. Size-se…
Abstract The mineralogy of the clay fraction was studied for soils and saprolite on two Blue Ridge Front mountain slopes. The clay fraction contained the weathering products of primary minerals in the mica gneiss and schist parent rocks. Gibbsite is most abundant in the saprolite and residual soil horizons, where only…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEquilibrium dissolution temperature of low molecular weight polyethylene fractions in dilute solutionAbaneshwar Prasad and Leo MandelkernCite this: Macromolecules 1989, 22, 2, 914–920Publication Date (Print):February 1, 1989Publication History Published online1 May 2002Publi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSeparation of close boiling point mixtures (p-cresol/m-cresol, guaiacol/alkylphenols, 3-picoline/4-picoline, substituted anilines) through dissociation extractive crystallizationVilas G. Gaikar, Alpana Mahapatra, and Man Mohan SharmaCite this: Ind. Eng. Chem. Res. 1989, 28,…
The aspartylprotease of the human immunodeficiency virus HIV-1 (NY5) has been crystallized in a form suitable for x-ray diffraction analysis. The crystals are tetragonal bipyramids and produce an x-ray diffraction pattern that exhibits the symmetry associated with space group P4(1)2(1)2 (or its enantiomorph, P4(3)2(1)…
Characteristic features of compositional ordering processes in ferroelectric (FE) and antiferroelectric (AFE) compounds, the effect of compositional ordering upon the Curie point, FE phase transition diffusion and other properties are considered. The effect offers ample scope for studies into the nature of FE transiti…
The overall performance of a Compton spectrometer and, in particular, its energy resolution are investigated both experimentally and theoretically for different scattering materials. Using low-Z (less than or equal to 8) scatterers of moderate sizes (scatterer diameter d less than or equal to 5 mm), there are negligib…
The amount and profile of the charge distribution in a polymethyl methacrylate plate of 7.9-mm thickness were measured after electron beam irradiation. When the plate was irradiated by a beam whose energy was 1 MeV and the total dose was 3 kGy, a spatial charged layer was produced at approximately 2.5 mm from the irra…
Spectropolarimetric observations of the BN object at 10 and 20 μm reveal a surprisingly large ratio of 20 to 10 μm polarization in the respective peaks. The results are compared with the predictions of core/mantle grain models based on graphite and ice mixtures with a variety of silicates. Except for a glassy bronzite…