Materials Literature
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Recent studies have established that subsurface material structures are altered in processes giving rise to wear. This is the case both for sliding contact and repetitive compound impact loading. It is not surprising that the thermal and mechanical processing due to solid contact and relative motion lead to localized…
Abstract The rheological behavior of an uncrosslinked polybutadiene on sudden application of finite strain was examined. The shear stress σ, two components of birefringence, and the extinction angle were measured in shear (magnitude of shear γ ≤ 3.5) and tensile stress and the birefringence were measured in uniaxial e…
Conference International Symposium on Polyvinylchloride, Third, Cleveland, Ohio, USA, 1980-08-10–1980-08-15 Published Online: 2009-01-01 Published in Print: 1981-01-01 © 2013 Walter de Gruyter GmbH, Berlin/Boston
Abstract Hydrogen is sorbed by “amorphous” molybdenum sulphide at two sites. One site becomes saturated at pressures less than 1 atmosphere and at temperatures less than 423 K. This is the site at which linear S‐H bonds form. The second site is occupied at higher temperatures, and the preliminary data suggests saturat…
The pseudo-binary systems BaB2O4-Na2O and BaB2O4-Na2B2O4 in the ternary system BaO-Na2O-B2O3 have been studied by means of thermal analysis and X-ray diffraction. The system BaB2O4-Na2B2O4 is a eutectic one and it's eutectic reaction occurs at 826 ±3℃. A new compound BaB2O4·Na2O which melts congruently at 846 ± 3℃ has…
We discuss here some of the basic issues involved in the development of an optical storage medium based on the laser micromachining of thin tellurium films. Results are presented in the areas of recording sensitivity, materials resolution, error statistics, and archival stability. It is shown that a medium using 20–30…
Abstract The effect of 2,2′‐oxydiethanol (diethylene glycol, DEG) content (ranging from 2 to 15 mol‐%) on unit cell dimensions, density, melting point, and small angle X‐ray scattering (SAXS) of undrawn and drawn annealed (in the range from 80 to 260°C) poly(ethylene terephthalate), (PET), is studied. It is establishe…
We describe the first example of reentrant ND nematic and D r columnar mesophases at atmospheric pressure in a pure disc-like compound.
The addition of 1,10-phenanthroline, o-phenylenebis(dimethylarsine), or triphenylstibine to pentafluorophenyl-(tetrahydrothiophen) gold(I) leads respectively to [Au(C6F5)(phen)], [Au(pdma)2][Au(C6F5)2], and [Au(SbPh3)4][Au(C6F5)2], the pdma derivative being the first four-co-ordinate gold(I) complex whose structure ha…
The secondary electron emission coefficients, γ, for in-situ vacuum-deposited targets of Al, Cu, Ag and Au are measured under proton bombardment in the energy range 4–12 MeV at a pressure of 1–2×10 -8 Torr. The values of γ for Al are only half of those obtained experimentally by Aarset et al. The ratios between γ and…
Conference International Conference on Surface and Colloid Science, International Conference on Surface and Colloid Science, ICSCS, Surface and Colloid Science, Fourth, Jerusalem, Israel, 1981-07-05–1981-07-10 Published Online: 2009-01-01 Published in Print: 1981-01-01 © 2013 Walter de Gruyter GmbH, Berlin/Boston
Optical absorption and reflection spectra of WO3, WO3 : H0, W x Mo1–x O3 : H0, and sub-stoichiometric ternary oxides have been measured. In WO3, the free-carrier absorption at room temperature switches over to small (or intermediate) polaron absorption near 0·7 eV at low temperatures. In fully oxidized ternary oxides…
Orientation behaviors of the polyvinylidene fluoride film drawn-rolled and of its poled film were investigated. The biaxial orientation distribution function (BODF) was determined for various reflections through the intensity peak and two kinds of integral widths, δ(2θ) and δx, obtained in terms of X-ray diffraction m…
Some inconsistencies in the results of earlier Mössbauer spectroscopic and magnetic susceptibility measurements on [Fe(phen)2(NCS)2](phen = 1,10-phenanthroline) demanded a systematic reinvestigation of this system. We have prepared the complex by two different methods: precipitation in methanol (A) and extraction from…
The latest available technology pertaining to the gasification of coal, thereby forming gaseous fuel products that are equivalent to or can be substituted for other fuels, is discussed. The coal gasification processes, including aspects of technical procedure and economic factors, are outlined. Topics of discussion in…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectronic structure of the rhodium-rhodium bond in Rh2(O2CR)2(PY3)2 by electron spin resonance study of their cation radicalsTakashi Kawamura, Kadzuhiko Fukamachi, Takayoshi Sowa, Shigeru Hayashida, and Teijiro YonezawaCite this: J. Am. Chem. Soc. 1981, 103, 2, 364–369Publi…
Abstract Cationic starch ether, important as a papermaking additive, was prepared from native corn starch and 2‐chloro‐3‐hydroxypropyltrimethylammonium chloride in aqueous media in a study to ascertain conditions yielding maximum reaction efficiency (RE). Based on the amount of monomer retained after exhaustive washin…
Rhodium octaethylporphyrin hydride, RhOEP-(H)(OEP = octaethylporphyrin),m reacts with carbon monoxide to form a neutral metallo-formyl complex.
Annu. Rep. Anal. At. Spectrosc., 1981, 11, 111 DOI: 10.1039/AA9811100111
Treatment with tannic acid and OsO4 (TA treatment) of tissue culture cells after fixation with glutaraldehyde and OsO4 resulted in good protection of the cell features against shrinkage and thermal damage caused by subsequent procedures used for specimen preparation. A difference in the degree of shrinkage between TA-…