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51.
K. Morigaki I. Hirabayashi M. Nakayama S. Nitta K. Shimakawa 《Solid State Communications》1980,33(8):851-856
Fatigue in the luminescence was observed in glow discharge amorphous silicon at 4.2 K and 77 K. This fatigue was not recovered by infra-red illumination, but by heating the sample at higher temperatures. These results are interpreted in terms of enhancement of non-radiative recombination associated with dangling bonds created by high optical excitation. 相似文献
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Rivkin A González-López de Turiso F Nagashima T Curran DP 《The Journal of organic chemistry》2004,69(11):3719-3725
A novel approach toward the synthesis of the BCD ring system of penitrem D is described. The strategy capitalizes on the fast cyclization rates of aryl radicals into cyclobutenes and allows access to a variety of fused tricyclic structures. Radical/polar crossover reactions of precursors 24-29 promoted by samarium diiodide in the presence of HMPA and acetone allow access to the fully functionalized BCD ring system of penitrem D. The stereochemical implications of these processes are evaluated, and a Pd-mediated cyclization approach toward the penitrems is also introduced. 相似文献
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In order to understand the α-nucleus interactions for the α+12C~α+16O systems systematically, α scattering from 12C is studied in a microscopic coupled-channel model using a folding potential and realistic microscopic wave functions of 12C. The experimental angular distributions of elastic and inelastic scattering to the 2+(4.43 MeV), 3? (9.64 MeV), and 0 2 + (7.66 MeV) states in the range of E α = 41–172.5 MeV are analyzed. 相似文献
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Dirhodium tetraprolinates in highly cross-linked macroporous polystyrene resins are very effective catalysts for asymmetric cyclopropanation using methyl aryldiazoaceates. 相似文献
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Azusa Shibazaki Hiroaki Tateno Ando Akikazu Jun Hirabayashi Tohru Gonoi 《Journal of carbohydrate chemistry》2013,32(3):147-164
Fungal surface glycans play roles in cell protection and interaction. Our knowledge of fungal glycans, however, is limited to model yeasts and a few medically/industrially important fungi. We evaluated the usefulness of a lectin microarray in analysis of live cell surface glycans and then applied the technique to glycome of varieties of yeast-form fungi from various phyla and subphyla. We found glycan profiles are different among and within taxonomic groups. For example, Saccharomycotina were classified into two groups, one bound to mannose-specific lectins and the other bound to galactose/N-acetylgalactosamine-specific lectins. In Basidiomycota, Pucciniomycotina yeasts were distinguished from other subphylum members in binding to fucose-specific lectins. Supplemental materials are available for this article. Go to the publisher's online edition of Journal of Carbohydrate Chemistry to view the free supplemental file. 相似文献