Materials Literature
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The core configuration and energies of the two symmetric configurations of an (a/2) [110] edge dislocation in a model MgO crystal were calculated atomistically using a point-ion or shell model with a rigid boundary region. Two short-range potentials and one set of shell-model parameters used in the present calculation…
Various crystal forms of sulphathiazole, barbitone and aspirin were compressed in a single-punch tablet machine instrumented to monitor axially applied and radially transmitted forces, and upper punch movement. The changes in radial stress during the compression cycle depended upon the polymorphic form of the compress…
Theoretical values of Rayleigh scattering amplitudes for the $K$ shell and for higher atomic shells are calculated from the second-order $S$ matrix of quantum electrodynamics. The calculations are combined with nuclear Thomson scattering to predict elastic scattering differential cross sections for photon energies bet…
Both the type I and type III collagens present in embryonic dermis are stabilized by the intermolecular cross-link, hydroxylysino-5-oxonorleucine, derived from hydroxylysine-aldehyde, although the type I collagen possesses a significant proportion of dehydrohydroxylysinonorleucine. However, concurrent with the change…
Summary The species composition of planktonic diatom crops in Loch Leven, Kinross, Scotland varied considerably over the years studied (1968–71) with centric forms predominating. Dense populations were often produced and rates of increase and decrease were high. Relations with dissolved silica did not appear always to…
The electrical conductivity of fluid selenium has been measured as a function of temperature and pressure to 1750°C and 1200 bars, respectively. The conductivity isobars exhibit strong increases to nearly-metallic behaviour in selenium above 1300°C at supercritical pressures. As the fluid is heated above 1500-1600°C t…
The uptake of various carbohydrates and the synthesis of adenosine 3':5'-monophosphate (cyclic AMP) are subject to inhibition by sugar substrates of the phosphoenolpyruvate:sugar phosphotransferase system in Escherichia coli. The induced synthesis of the sugar-specific components of the phosphotransferase system was s…
Polybutadiene-coated steel exhibits highly localized corrosion sites that spread with time. Delamination of the coating occurs in the cathodic areas immediately adjacent to the anodic corrosion sites. Data obtained from electrical measurements, corrosion potentials, and literature sources were used to arrive at an ove…
Collagen in bulk was isolated in about 30% yield from the livers of normal human beings and from livers of persons with alcholic cirrhosis. Analyzed chemically and examined by electron microscopy, the collagen in each case was shown to consist of two types identical with, or resembling closely, type I and type III col…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTComprehensive study of satellite structure in the photoelectron spectra of transition metal compoundsG. A. Vernon, Galen. Stucky, and Thomas A. CarlsonCite this: Inorg. Chem. 1976, 15, 2, 278–284Publication Date (Print):February 1, 1976Publication History Published online1 M…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMagnetic properties of .alpha.-di-.mu.-hydroxo-bis[2-(2-dimethylaminoethyl)pyridinecopper(II)] perchlorate, .alpha.-[Cu(DMAEP)OH]2(ClO4)2Kenneth T. McGregor, Derek J. Hodgson, and William E. HatfieldCite this: Inorg. Chem. 1976, 15, 2, 421–425Publication Date (Print):Februar…
In occluded cells, such as crevices, the chemical composition of the electrolyte tends to change dramatically with time from the original bulk composition. The consequences of such changes are reviewed using the binary Cu-Ni and binary Fe-Cr systems as examples. In the case of the copper base alloys, conditions leadin…
The difficulties in interpreting the observed anomalies in the elastic moduli of Invar alloys below the Curie point are briefly reviewed. An intrinsic magnetic component is obtained explicitly on the basis of the itinerant electron model and found to be given by the spontaneous volume magnetostriction and is thus prop…
Abstract Ir 4+ , incorporated on the octahedral a‐sites of Y 3 Ga 5 O 12 :Ir, has been investigated by electron spin resonance at 9 and 35 GHz, and by optical absorption spectroscopy in the range 5000 to 6000 cm −l . For an unequivocal optical identification Zeeman measurements were performed. In the same energy range…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTBinding of pyridine to phenyl-substituted derivatives of zinc tetraphenylporphineGlenn C. Vogel and Bruce A. BeckmannCite this: Inorg. Chem. 1976, 15, 2, 483–484Publication Date (Print):February 1, 1976Publication History Published online1 May 2002Published inissue 1 Februar…
Ferrierite specimens from localities at Altoona, Washington; Silver Mountain, Alpine County, California; and Pinaus Lake, Monte Lake, and Francois Lake, British Columbia, have been analyzed by microprobe methods. These new analyses are combined with available data to delineate the compositional range for this zeolite.…
Abstract A study has been made of the crosslinking of linear polyethylene in solution. Networks containing a low number of trapped entanglements and elastically ineffective chain ends were prepared by crosslinking high molecular weight linear polyethylene in 1,2,4‐trichlorobenzene solutions with dicumyl peroxide at 12…
Abstract not Available.
The vapour spectrum of pyrrole was investigated below 39 000 cm-1. Four Rydberg-like series were observed with a vibrational pattern that appears to be similar to the one previously found for other simple heterocycles, and to involve excitations of v 8, v 7, v 5, v 4. The series lead to the lowest ionization potential…
Abstract Stable organomineral derivatives are formed by reaction of organochlorosilanes with certain phyllosilicates. Organosiloxyl functions are grafted on silanol groups present at external mineral surfaces. Water molecules adsorbed on external mineral surfaces may cause hydrolysis of the reactant organosilicon prod…