Materials Literature
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The postirradiation fracture toughness responses of Types 316 and 304 stainless steel wrought products, cast CF8 stainless steel, and Type 308 stainless steel weld deposit were characterized at 427°C using JR curve techniques. Fast neutron irradiation of these alloys caused an order-of-magnitude reduction in Jc and tw…
Continuing advances in hardware and software have improved both the speed and the range of computations that can be made to simulate high resolution electron microscope (HREM) images from various structures. Use of image display systems and array processors have made the image simulation procedure much more interactiv…
Physical interactions between pyridoxal kinase and aspartate aminotransferase were detected by means of emission anisotropy and affinity chromatography techniques. Binding of aspartate aminotransferase (apoenzymes) to pyridoxal kinase tagged with a fluorescent probe was detected by emission anisotropy measurements at…
The fructose-2,6-bisphosphatase domain of rat liver 6-phosphofructo-2-kinase/fructose-2,6-bisphosphatase (EC 2.7.105/EC 3.1.3.46) was expressed in Escherichia coli by using an expression system based on bacteriophage T7 RNA polymerase. The protein was efficiently expressed (i) as a fusion protein that starts at the T7…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA New Pentacyclic Triterpene from Calotropis proceraAbdul Qasim Khan, Zaheer Ahmed, Syed Najam-ul-Hussain Kazmi, and Abdul MalikCite this: J. Nat. Prod. 1988, 51, 5, 925–928Publication Date (Print):September 1, 1988Publication History Published online1 July 2004Published ini…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTIsomorphous substitution in phyllosilicates as an electronegativity perturbation: its effect on bonding and charge distributionWilliam F. Bleam and Roald HoffmannCite this: Inorg. Chem. 1988, 27, 18, 3180–3186Publication Date (Print):September 1, 1988Publication History Publ…
Total immersion testing of a range of stainless alloys and a mild steel in cultures of sulfate-reducing bacteria (SRB) was conducted. A detailed study of corroded samples under the scanning electron microscope (SEM) indicated that corrosion manifested itself both as pitting and intergranular attack. AISI(1) 304L stain…
The effects of irradiation on the coefficient of thermal expansion (CTE), the density, and the elastic moduli of low‐CTE materials such as amorphous SiO 2 , ultra‐low‐expansion glass, β‐SiC, Astrositall, and Zerodur were surveyed. It was found that the properties of all of these materials were affected by radiation ex…
Five stoichiometric phases of the system that can be represented by the general formula have been identified in high temperature cells. Their formation is dependent on the operating temperature and the state of charge of the cell. The structural characteristics of the five phases, which provide an insight into the rea…
Dicalcium silicates having CaO/SiO 2 molar ratios of 1.8 to 2.2 were sintered at 1450°C for 90 min with or without small quantities of dopants (K 2 O or Al 2 O 3 ) and were air quenched. The microstructures of the fired samples were characterized using electron microscopy (SEM and TEM) and associated microanalytical t…
Information on molecular interactions that give rise to the stabilization of various ferroelectric, liquid-crystalline mesophases is important to the realization of their potential utility in a wide variety of optical devices. Understanding the roles that optical activity and optical purity play in the formation and p…
In order to study the microdynamics of translational and orientational motion of ions in liquid electrolytes, a molecular dynamics simulation of molten LiNO3, which includes all degrees of freedom of vibrating nitrate ions, has been performed. Simple Coulomb pair potentials with Born-type repulsions have been adopted…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFluorescence from the 11Bu state of diphenylhexatriene: inversion of the 11Bu and 21Ag levels in carbon disulfideBryan E. Kohler and Takao ItohCite this: J. Phys. Chem. 1988, 92, 18, 5120–5122Publication Date (Print):September 1, 1988Publication History Published online1 May…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectronic excitation MO assignment of rhodium carboxylato complexes, Rh2(O2CR)4(Lax)2, using MCD experiment and theoryJack W. Trexler Jr., Anton F. Schreiner, and F. Albert CottonCite this: Inorg. Chem. 1988, 27, 19, 3265–3267Publication Date (Print):September 1, 1988Public…
Abstract Melt‐mixed blends of polycarbonate/phenoxy were obtained before and after Interchange reactions by controlling the processing time. The dynamic mechanical analysis of the physical and reacted blends confirmed the immiscibility of the pair and the displacement of the glass‐transition temperatures of the mixtur…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTBrianthein V, a New Cytotoxic and Antiviral Diterpene Isolated from Briareum asbestinumStephen J. Coval, Sue Cross, Gerald Bernardinelli, and Charles W. JeffordCite this: J. Nat. Prod. 1988, 51, 5, 981–984Publication Date (Print):September 1, 1988Publication History Publishe…
Abstract Potassium‐Ca and Na‐Ca exchange isotherms were obtained for two kaolinite samples and two kaolinitic soils (Hutton and Avalon forms). The Gapon, Vanselow, and Gaines‐Thomas corrected selectivity coefficients were usually greater for K‐Ca exchange than for Na‐Ca exchange, as was expected. The exchange isotherm…
Four patients with intracranial aneurysm clips made from a variety of alloys were studied without incidence by MR imaging at field strengths ranging from 0.35 to 0.6 T. Knowledge of the type of alloy used in the manufacturing of an aneurysm clip is important in determining whether the clip will or will not deflect in…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and x-ray structural characterization of binuclear iridium(I) and rhodium(I) hydroxypyridinate complexes. 1. Complete assignment of the proton NMR spectra by two dimensional and NOE techniques. The nature of inside and outside proton chemical shift differencesGary…
An intravenous injection of 153Gd-labeled gadolinium-DTPA or gadolinium chloride was given to 60 rats, which were killed either 15, 40, 120, 300, 900, or 3600 seconds later. Tissue concentrations of gadolinium in the blood, liver, spleen, stomach, pancreas, renal cortex, renal medulla, lungs, heart, adrenals, gluteal…