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71.
Tetsuji Kametani Keiichiro Fukumoto Takuo Nakano 《Journal of heterocyclic chemistry》1972,9(6):1363-1366
The indisputable benzyne reaction of 1-(5-bromo-3,4-dimethoxybenzyl)-1,2,3,4-tetrahydro-7-hydroxy-6-metlioxy-2-methylisoquinoline (II) with sodium amide in liquid ammonia afforded the following compounds, (±)-cryptaustoline iodide (VI), (±)-thaliporphine (VIII), 1 -(3,4-dimeth-oxybenzyl)- (III), and 1 -(2-amino-4,5-dimethoxybenzyl)-l,2,3,4-tetrahydro-7-hydroxy-6-meth-oxy-2-methylisoquinoline (IV). 相似文献
72.
WU JiHuai CHENG YingHan LIN JianMing HUANG YunFang HUANG MiaoLiang LI YiBin YIN Shu SATO Tsugio 《中国科学B辑(英文版)》2007,50(4)
A novel photocatalytic material (Pt,Cd0.8Zn0.2S)/HLaNb2O7 was fabricated by successive intercalation and exchange reactions. The (Pt,Cd0.8Zn0.2S)/HLaNb2O7 possessed a gallery height less than 0.5 nm and showed a broad absorption with wavelength over 370―500 nm. Using (Pt,Cd0.8Zn0.2S)/HLaNb2O7 as catalyst, the photocatalytic H2 evolution was more than 160 cm3·h-1·g-1 in the presence of Na2S as a sacrificial agent under irradiation with wavelength more than 290 nm from a 100-W mercury lamp. Furthermore, the catalyst showed photocatalytic activity even under visible light irradiation. 相似文献
73.
Phenolic cyclization of 2-ethoxycarbonylmethylidenecyclohexanone (IV) with 3-hydroxy-4-methoxyphenethylamine (V) were performed in the process of finding a synthetic approach to dihydroerysolidine (I). Thus, 16-hydroxy-15-methoxyerythrinan-6-ene-8-one (VI) and 16-hydroxy-15-methoxyerythrinan-7-ene-8-one (VII) were synthesized, both of which were hydrogenated in the presence of Adams platinum to give the same product (XI). Furthermore, on the basis of the mass spectra of XI and XII, these compounds were assumed to be stereoisomeric at the C5- and C6-positions. 相似文献
74.
Michinori Akaiwa Hiroki Fukumoto Takakazu Yamamoto 《Journal of organometallic chemistry》2005,690(18):4192-4196
Thioamide-based tridentate ligands, 1,3-benzenedicarbothioamides (1a-c), were used to afford pincer palladium(II) complexes (Pd(1-H)Cl, 2a-c) with η3-S,C,S type coordination. The complexes exhibit strong emission in a glassy frozen state as well as in the solid state. The decay lifetime of the emission from the complexes is in a range of 8-9 × 10−5 s, which is indicative of phosphorescent emission. 相似文献
75.
Vinyl cations generated by the title photolysis gave vinyl azides by capture of an azide ion and their further photolyses resulted in the formation of cycloaddition-products via nitrile ylides derived from the corresponding azirines. 相似文献
76.
Katsuhiro Shirono Kosei Iwase Hiroshi Okazaki Masaru Yamazawa Kazuhiro Shikakume Natsuo Fukumoto Masashi Murakami Masaaki Yanagisawa Takahisa Tsugoshi 《Accreditation and quality assurance》2013,18(3):161-174
Methods of utilizing the Youden plot obtained from interlaboratory comparison tests are proposed. The Youden plot is a powerful tool for visually evaluating between- or within-laboratory errors. However, there are no generally applicable methods to indicate the anomalies in the between- and the within-laboratory errors in qualitative terms. An evaluation frame was therefore developed in this study as an indication method. Moreover, the Youden plot is considered to be useful for visually assessing the comprehensive performance of laboratories using two types of results. Although the confidence ellipse has been proposed in ISO 13528:2005 for this purpose, robust determination of the parameters has not yet been implemented. In the present study, robust determination of one of the parameters, the correlation coefficient, was developed. Our proposals were analytically validated using two types of statistical models. In addition, the properties were evaluated through computational simulations. From the results obtained, it can be concluded that our proposals are practically applicable to actual interlaboratory comparison tests. 相似文献
77.
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79.
Masaru Tomita Yusuke Fukumoto Kenji Suzuki Yukikazu Iwasa 《Physica C: Superconductivity and its Applications》2010
Large single-grain bulk RE–Ba–Cu–O (RE: rare earth elements) superconductors can trap large fields exceeding several teslas and thus can function as very strong quasi-permanent magnets. We have found that the resin can penetrate into a bulk superconductor, when the sample was immersed in molten resin. Hence, resin impregnation was effective in improving mechanical properties. Three bulk superconductors‘ annuli with resin impregnation, each 50-mm i.d. and 80-mm o.d. was built and energized, by a field-cool method, to generate, in a bath of liquid nitrogen, a persistent trapped field of 1.62 T. 相似文献
80.
Nitrogen and sulfur co-doped SrTiO3 was prepared by high energy grinding of the mixture of SrTiO3 and thiourea. A new band gap in visible light region (522 nm) corresponding to 2.37 eV could be formed by the co-doping. The photocatalytic activity for nitrogen monoxide oxidation of SrTiO3 in visible light region especially in the long wavelength range (λ > 510 nm) could be improved greatly. Under the irradiation of light with wavelength larger than 510 nm, the photocatalytic activity of nitrogen and sulfur co-doped SrTiO3 was 10.9 times greater than that of pure SrTiO3. The high visible light photocatalytic activity of this substance may be due to the formation of a new band gap that enables to absorb visible light effectively. 相似文献