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441.
Yoshinori Kamiya Katsuhiko Terada Yasutoshi Naito Jin-Sheng Wang 《Journal of Polymer Science.Polymer Physics》1995,33(11):1663-1671
Sorption and dilation isotherms and diffusion coefficients for seven hydrocarbons (n-butane, isobutane, 1-butene, cis-2-butene, trans-2-butene, isobutylene, and 1,3-butadiene) in two rubbery polymers, 1,2-polybutadiene (PB) and poly(ethylene-co-vinyl acetate) (EVAc), were measured at 25°C. Dissolution parameters (Henry's law coefficient and Flory-Huggins interaction parameter), partial molar volumes, and diffusion coefficients were determined. PB exhibited greater affinity and lower diffusivity than EVAc to the C4 gases, although the gases showed nearly the same partial molar volumes in the two polymers. The diffusivity of such elongated molecules as trans-2-butene in both polymers was higher than that of bulky molecules with similar partial molar volume, such as cis-2-butene and isobutylene. Pressure-dependent permeabilities of PB and EVAc films to the hydrocarbons were predicted and discussed based on the dissolution parameters and the diffusivities. © 1995 John Wiley & Sons, Inc. 相似文献
442.
T. Inui S. Terada H. Tamura N. Ichinose 《Fresenius' Journal of Analytical Chemistry》1984,318(7):502-504
Summary Antimony was determined in solder alloy (NBS; SRM 1276) by a combination of hydride generation with reducing tube, graphite furnace atomization and atomic absorption detection. Stibines were generated in a horizontal glass tube, in which a pellet of sodium borohydride was placed. 1.2–1.3 1/min of argon flow rate, 2,300° C of atomization temperature and 1.2–2.5 M of acids concentration were the best experimental conditions. The strong supression of the antimony signal by nickel, cobalt and copper was effectively eliminated with 1,10-phenanthroline. A detection limit of 1.2 ng was obtained with a precision of 4–5%. The reducing tube used in this technique is extremely simple and can be connected to all the types of graphite furnaces. Furthermore, this technique can be used for the determination of mercury [1].
Paper read at the meeting of the Japan Society for Analytical Chemistry, October 1983 相似文献
Bestimmung von Antimon in Lotlegierung durch Hydriderzeugung mit nachfolgender Atomisierung im Graphitrohr und AAS-Detektion
Zusammenfassung Antimon wurde nach diesem Verfahren in Lotlegierung NBS (SRM 1276) bestimmt. Die Stibine wurden in einer horizontalen Glasröhre erzeugt, die gekörntes Natriumborhydrid enthielt. Der Argonfluß betrug 1, 2–1,3 l/min, die Atomisierungstemperatur 2300° C und die Konzentration an Säure 1,2–1,5 M. Die starke Unterdrückung des Sb-Signals durch Ni, Co und Cu konnte erfolgreich mit Hilfe von 1,10-Phenanthrolin verhindert werden. Die Nachweisgrenze lag bei 1,2 ng, die Präzision betrug 4–5%. Die benutzte Reduktionsröhre ist sehr einfach und kann an alle Typen von Graphitöfen angeschlossen werden. Das Verfahren läßt sich auch zur Quecksilberbestimmung [1] einsetzen.
Paper read at the meeting of the Japan Society for Analytical Chemistry, October 1983 相似文献
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Per atom muon capture ratios and effects of molecular structure on muon capture by γ-Fe2O3 and Fe3O4
Ninomiya Kazuhiko Kajino Meito Inagaki Makoto Terada Kentaro Sato Akira Tomono Dai Kawashima Yoshitaka Shinohara Atsushi 《Journal of Radioanalytical and Nuclear Chemistry》2020,324(1):403-408
Journal of Radioanalytical and Nuclear Chemistry - An elemental analysis method utilizing muons has been demonstrated to be effective for non-destructive and quantitative analysis of precious bulk... 相似文献
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Y. Tanaka T. Yanagisawa A. Crisan P.M. Shirage A. Iyo K. Tokiwa T. Nishio A. Sundaresan N. Terada 《Physica C: Superconductivity and its Applications》2011,471(21-22):747-750
Multiband superconductors can have several types of domains that are inhibited in conventional single-band superconductors. These domains are phase domains and chiral domains and their domain wall are an interband phase difference soliton. In a superconductor with an odd number of electronic bands (five or more) and with positive interband Josephson interactions, we find other types of domains with different interband phase differences. We call these domains configuration domains because pseudo-order parameters for each band are dispersed in the complex plain and several configurations, which have several local minima. Fractional vortices serve as hubs for phase difference solitons (configuration domain walls). The divergence of the number of configurations with local minima would pose a serious problem for the stability of superconductivity. 相似文献
450.
Terada M Moriya K Kanomata K Sorimachi K 《Angewandte Chemie (International ed. in English)》2011,50(52):12586-12590
Syn-gled out: The syn diastereo- and enantioselective addition of azlactones to 3-vinylindoles was accomplished by using a chiral, binapthol-derived, Br?nsted acid catalyst (see scheme). This method enables facile access to tryptophan derivatives with adjacent quaternary and tertiary stereogenic centers, which are potentially useful for the synthesis of peptidomimetics. 相似文献