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Spectroscopy of Faint Kepler Mission Exoplanet Candidate Host Stars
Stellar properties are measured for a large set of Kepler Mission exoplanet candidate host stars. Most of these stars are fainter than 14th magnitude, in contrast to other spectroscopic follow-up studies. This sample includes many high-priority Earth-sized candidate planets. A set of model spectra are fitted to R~3000 optical spectra of 268 stars to improve estimates of Teff, log(g), and [Fe/H] for the dwarfs in the range 4750K=-0.05, large planets suddenly appear in the sample while smaller planets are found orbiting stars with a wider range of metallicity. The modelled stellar spectra, as well as an additional 84 stars of mostly lower effective temperatures, are made available to the community.
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Nitrene-carbene rearrangement during photolysis of 2-azido-1,3,5-triazines in argon matricesS. V. ChapyshevFull ArticlesDOI:
10.-011-0352-zCite this article as: Chapyshev, S.V. Russ Chem Bull (01. doi:10.-011-0352-z
It was shown using IR spectroscopy and ESR spectroscopy that UV irradiation of 2-azido-4,6-dichloro-1,3,5-triazine isolated in solid argon resulted in triplet 4,6-dichloro-1,3,5-tri-azinyl-2-nitrene (D = 1.384 cm-1, E = 0.004 cm-1), whose further photochemical transformation included the consecutive formation of 3-didehydro-1,2,4,6-tetraazepine, 2-chloro-1-diazochloromethyl-2-isocyanocarboimide, and presumably triplet 2-chloro-1-chloromethyl-idene-2-isocyanocarboimide and isocyanodichloroacetonitrile. The photolysis of 2-azido-4,6-dimethoxy-1,3,5-triazine and 2-azido-4,6-di(dimethylamino)-1,3,5-triazine affords photo-chemically stable triplet 4,6-dimethoxy-1,3,5-triazinyl-2-nitrene (D = 1.436 cm-1, E = 0.0044 cm-1) and 4,6-bis(dimethylamino)-1,3,5-triazinyl-2-nitrene (D = 1.468 cm-1, E = 0.0042 cm-1) as the final products.azidotriazinesnitrenescarbenesphotolysismatrix isolationelectron paramagnetic resonanceIR spectroscopy1.E. F. V. Scriven, K. Turnbull, Chem. Rev., 1988, 88, 297.2.
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Author(s): PRICE DJD
Title: GENERAL THEORY OF BIBLIOMETRIC AND OTHER CUMULATIVE ADVANTAGE PROCESSES
Source: JOURNAL OF THE AMERICAN SOCIETY FOR INFORMATION SCIENCE 27 (5-6): 292-306
Date: 1976&
Document Type: Journal : Article
Language: English
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Address: YALE UNIV, DEPT HIST SCI & MED, NEW H***EN, CT 06520 USA.
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