Materials Literature
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The crystal structure of muconolactone isomerase from Pseudomonas putida, a unique molecule with ten 96 amino acid subunits and 5-fold, and 2-fold symmetries, has been solved at 3.3 A resolution. The non-crystallographic symmetries were used to refine the initial single isomorphous replacement phases and produce an in…
The equation of state of icosahedral ${\mathrm{Al}}_{86}$${\mathrm{Mn}}_{14}$ (i-Al-Mn) at room temperature has been determined up to \ensuremath{\sim}28 GPa using diamond-anvil x-ray powder-diffraction techniques. The i-Al-Mn remained icosahedral over this pressure range; no phase transition was observed. The measure…
Microcrystalline ribbons of Fe-6.5 wt% Si alloy prepared by planar flow on Cu-Be wheel are used. Grain growth during isochronal annealing is measured. We confirmed by X-ray diffraction, transmission electron microscopy and Vicker's microhardness the different phase domains of A 2 . B 2 and DO 3 . Ordering kinetics are…
It is shown that the number of collisions in a system of finitely many hard spheres, which interact through elastic collisions but move freely otherwise in all of 3 R3, is finite.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA study on mechanical deformation of highly oriented poly(oxymethylene) by vibrational spectroscopy and X-ray diffraction: stress and temperature dependences of Young's modulusGang Wu, Kohji Tashiro, Masamichi Kobayashi, Tamikuni Komatsu, and Koichi NakagawaCite this: Macrom…
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,…