Materials Literature
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Soft X-ray appearance potential spectra were recorded for a series of Fe/Ni alloys whose compositions in the surface region were determined by means of Auger electron spectroscopy. The L 3 appearance potentials (correlated with the binding energies of 2p 3/2 electrons) of Ni increase by 0.5 eV between 0 and 30% Fe and…
350-keV He+ backscattering analysis was applied to the investigation of Ag photoinduced diffusion into As2S3 glass and proved to be suitable for the present purposes. Silver atoms diffuse into As2S3 by photoirradiation (termed ’’photodoping’’). Photodoped Ag concentration is nearly uniform and falls abruptly beyond a…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStabilization of carbonyl clusters by a carbide atom. Synthesis and characterization of carbonoctadecacarbonyloctacobaltate(2-) and of paramagnetic carbontetradecacarbonylhexacobaltate(1-) anionsVincenzo G. Albano, Paolo Chini, Gianfranco Ciani, Mirella Sansoni, Donatella St…
Abstract Die aliphatischen Polyamide Polyamid‐6 ( 1 ), Polyamid‐6,6 ( 2 ) und die aromatischen Polyamide der Terephthalsäure mit verschiedenen Diaminen [ p ‐Phenylendiamin, ( 3 ), 4,4′‐Biphenylylendiamin, ( 4 ), 4,4′‐Oxydianilin, ( 5 )] sowie Polyimide der Pyromellitsäure mit aliphatischen Diaminen [Äthylendiamin, ( 6…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHalogen-metal exchange in esters of haloaryl acidsWilliam E. Parham and Lawrence D. JonesCite this: J. Org. Chem. 1976, 41, 16, 2704–2706Publication Date (Print):August 1, 1976Publication History Published online1 May 2002Published inissue 1 August 1976https://pubs.acs.org/d…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhosphorus-nitrogen compounds. 26. Molecular motion and molecular separations in cyclophosphazene clathratesH. R. Allcock, R. W. Allen, E. C. Bissell, L. A. Smeltz, and Martha TeeterCite this: J. Am. Chem. Soc. 1976, 98, 17, 5120–5125Publication Date (Print):August 1, 1976Pu…
The angular spectrum of plane waves representation is obtained for the electromagnetic field radiated by a localized current source in a uniaxially anisotropic medium. The linear medium is homogeneous throughout all space. It may be absorbing and temporally dispersive but is not spatially dispersive. The conductivity…
Current theories of the smectic C phase depend primarily on the presence of dipole moments. However, certain mesogens have now been prepared which suggest that an alternative view relating to the origin of these tilted lamellar phases will have to be considered.
Abstract A model for the electrostatic properties of hydrated collagen fibrils, based on the concept of a “penetrable” protein, has been evaluated through studies of collagen fibrils that had been chemically modified to change their electrostatic properties,. A value of 0.28 ± 0.07 ml/g was found for the intrafibrilla…
The utilization by Escherichia coli K12 of raffinose as sole carbon source depends on a new raffinose transport system, an invertase and an alpha-galactosidase specified by the Raf-plasmid D1021. The alpha-galactosidase was purified to homogeneity from a mutant strain with constitutive synthesis of the enzyme. alpha-G…
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The phase diagram, growth processes of extended-chain crystal and high pressure phase, and the temperature dependency of lattice parameter in polyethylene have been studied under high pressure up to 6000 kg/cm 2 using a new high pressure X-ray diffraction apparatus. The high pressure phase diagram obtained by micro-DT…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCrystal structure of zirconium monochloride. A novel phase containing metal-metal bonded sheetsDouglas G. Adolphson and John D. CorbettCite this: Inorg. Chem. 1976, 15, 8, 1820–1823Publication Date (Print):August 1, 1976Publication History Published online1 May 2002Published…
Integrated high-frequency transistors (f/SUB T/>3 GHz) with an arsenic implanted polysil emitter have been investigated. The results are compared with data of bipolar transistors made with the conventional planar technique. It is shown that better emitter efficiency higher current carrying capability, and improved emi…
A complete individualization of cotton tufts produced in an opening room is not easy, and hence the tuft weight distribution can be largely influenced by the technique used for tuft separation. Various research workers have arrived at different types of tuft weight frequency distribution. The present study describes a…
Abstract Magnetization measurements of polycrystalline NdCo 2 are reported as a function of temperature (4.2 to 200 K) and magnetic field (0.2 to 26 koe). Anomalies in the temperature dependence of the magnetization are attributed to a [110] to [100] spin rotation around 40 K. Single‐ion crystal field calculations whi…
An anomalous longitudinal magnetoresistance which decreases with increasing magnetic field in an appropriate specimen geometry has been investigated for semimetals. An intuitive explanation of this phenomenon is given in terms of geometry of inhomogeneous currents under the influence of a magnetic field. Experimental…
The isotropic and anisotropic 19F NMR shifts for Yb3+ doped into alkaline earth fluorides is calculated using a covalent model for the spin transfer. The good agreement between theory and experiment is strong evidence for the covalent model being the correct model in the case of Yb3+. The calculations reveal that the…
The electrochemical behavior of sulfur and sulfide in molten NaAlCl 4 saturated with NaCl has been investigated at different temperatures and with different electrode materials. In melts containing sulfur one reduction and one oxidation wave are seen at tungsten and glassy carbon electrodes. At platinum two reduction…
1. Desmosine and isodesmosine were separated by ion-exchange and paper chromatography, after acid hydrolysis of purified elastin from beef ligamentum nuchae. The fractions obtained by ion-exchange chromatography were clearly mixtures of related compounds. The desmosine fraction could be resolved into seven compounds a…