Materials Literature
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Abstract Über Röntgen‐ und Neutronenbeugungsexperimente an pulverförmigen Proben wurde die Kristallstruktur von BaH 2 bzw. BaD 2 neu bestimmt. Sie entspricht der des Calciumdeuterids [1, 2] und zeigt, daß die seinerzeit von Zintl und Harder [3] angenommenen Wasserstoffpositionen nicht zutreffen. Die Einordnung des Bar…
Abstract Experimental studies on the solid‐state polymerization (SSP) of polyethylene terephthalate (PET) for the particle sizes of 14–16 mesh at 170–200°C and for the particle sizes of 14–18 mesh at 210–240°C are carried out under a vacuum of about 60 mtorr. Analysis of the data of the concentrations of hydroxyl and…
A self-consistent macroscopic thermodynamics is developed for the calculation of work, heat, and dissipation for thermodynamic paths of the shape memory alloy, Nitinol. The thermodynamic system analyzed is a Nitinol helix for which extensive force–length–temperature (FLT) equation of state measurements have been made.…
Abstract Blends of various poly(aryl ether ketones) have been found to exhibit a range of miscibility and isomorphic behavior. This range is dependent on molecular weight; however, for poly(aryl ether ketones) with number‐average molecular weight of 20,000, this range is about ±25% difference in ketone content. All mi…
This paper presents practical knowledge about dissolving and spinning cellulose in the NMMO-H 2 O system described in the Kodak and Akzona patents. From the highly hydrated NMMO commercialized by Texaco and a viscose pulp with an average polymerization degree of 700, we made true solutions in two stages: swelling of t…
Crystals of poly-bis(pyrazine)bis(methanesulfonato-O)copper(II) are orthorhombic, a = 8.199(1), b = 13.130(1), c = 6.913(1) Å, Z = 2, space group Pnnm. The structure was solved by conventional heavy atom methods and was refined by full-matrix least-squares procedures to R = 0.025 and R w = 0.033 for 1226 reflections w…
Abstract The electrical properties of a number of filled plastics were examined after subjecting the materials to exposure to isopropyl alcohol, a 25°C detergent/water solution, an 80°C detergent/water solution, and at various chemical plant sites. Compositions which contained metal fillers maintained their conductivi…
Numerical and analytic studies of the effect of long-range (i.e., algebraic) potentials on wetting transitions near bulk critical temperatures are presented within mean-field theory on an Ising lattice gas. The ordinary, special, and extraordinary points of the short-ranged-potential theory of Nakanishi and Fisher rem…
Corona discharges can be useful tools in the semiconductor industry. This paper describes published and previously unpublished applications of corona discharges in device manufacturing, in quality control of insulators, in failure analysis, and in understanding electrical properties of insulators. These uses include d…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA new structural form of tin in an oxygen-capped clusterRoberta O. Day, Joan M. Holmes, V. Chandrasekhar, and Robert R. HolmesCite this: J. Am. Chem. Soc. 1987, 109, 3, 940–941Publication Date (Print):February 1, 1987Publication History Published online1 May 2002Published in…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSpin equilibrium in iron(II) poly(1-pyrazolyl)borate complexes: low-temperature and high-pressure Moessbauer spectral studiesGary J. Long and Bennett B. HutchinsonCite this: Inorg. Chem. 1987, 26, 4, 608–613Publication Date (Print):February 25, 1987Publication History Publis…
New general results on the self-energy of fast electrons interacting with metal surfaces are presented with emphasis on the energy-loss problem in electron microscopy. Some applications to both spherical and planar targets are considered. Our results are relevant to the understanding of inelastic electron scattering n…
The intracellular concentrations of the polypeptides encoded by the two enolase (ENO1 and ENO2) and three glyceraldehyde-3-phosphate dehydrogenase (TDH1, TDH2, and TDH3) genes were coordinately reduced more than 20-fold in a Saccharomyces cerevisiae strain carrying the gcr1-1 mutation. The steady-state concentration o…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSpectroscopic studies of the binuclear ferrous active site of deoxyhemerythrin: coordination number and probable bridging ligands for the native and ligand-bound formsRichard C. Reem and Edward I. SolomonCite this: J. Am. Chem. Soc. 1987, 109, 4, 1216–1226Publication Date (P…
Abstract The luminescence of colloidal CdS in solutions containing sodium polyphosphate as stabilizer is activated by the addition of either Ag(ClO 4 ) or colloidal Ag 2 S. The degree of activation depends on how strongly the CdS and Ag2S particles are attached to each other, and this attachment is controlled by the c…
The authors present results obtained by 57 Fe Mossbauer spectroscopy on R 2 Fe 14 B, where R represents any of the rare earth elements except Pm, Eu and Yb. Additional measurements have been performed on oriented powder for R=Y, Pr and Ho. For the case of Y the measurements at 4.2 K were performed in applied magnetic…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMolecular structure and magnetic properties of a novel Fe(III) tetranuclear complex containing oxo, alkoxo, and carbonato bridgesDonald L. Jameson, Chuan Liang Xie, David N. Hendrickson, Joseph A. Potenza, and Harvey J. SchugarCite this: J. Am. Chem. Soc. 1987, 109, 3, 740–7…
Abstract In the early days of electron microscopy polystyrene latex particles were used as magnification standards. But in contrast to optical diffraction grating replicas made with carbon or SiO with precise line spacings resistant to electron irradiation, the latex spheres undergo changes, and conflicting reports ha…
It is shown that a recurrence relation exists such that the resolution function and luminosity of an optical system consisting of any number of alternate collimators and reflecting crystals can be calculated analytically. Certain cases of practical interest in neutron and X-ray diffraction are evaluated explicitly usi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructure of [(.eta.-C5H5)Fe(CO)2(CS)]PF6, a comparison of metal-thiocarbonyl and metal-carbonyl bondingJames W. Richardson Jr., Robert J. Angelici, and Robert A. JacobsonCite this: Inorg. Chem. 1987, 26, 3, 452–454Publication Date (Print):February 1, 1987Publication History…