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73 results on '"Narwid"'

55. Vitamin D3 metabolites. II. Further syntheses of 25-hydroxycholesterol

Author

Milan R. Uskokovic, Kevin E. Cooney, and Thomas Albert Narwid

Subjects
Vitamin, Magnetic Resonance Spectroscopy, Optical Rotation, Spectrophotometry, Infrared, Stereoisomerism, Mass spectrometry, Biochemistry, Medicinal chemistry, Catalysis, Mass Spectrometry, Inorganic Chemistry, chemistry.chemical_compound, Spectrophotometry, Drug Discovery, medicine, Methods, Physical and Theoretical Chemistry, Hydroxysteroids, Cholecalciferol, medicine.diagnostic_test, Chemistry, Organic Chemistry, Nuclear magnetic resonance spectroscopy, Cholesterol
Abstract

Zwei weitere Synthesen von 25-Hydroxycholesterin (10) ausgehend von Pregnenolon (1) bzw. O-acetylpregnenolon (13) werden beschrieben. Dabei wird jedesmal auch das noch unbekannte 20(S)-25-Hydroxycholesterin (11) erhalten. Fernerhin wird ein Zusammenhang zwischen der chemischen Verschiebung der NMR.-Signale der C(21)-Methylgruppe und der Stereochemie am C(20) festgestellt.

Published
1974

57. A total synthesis of comptothecin and deethyldeoxycamptothecin

Author

Thomas A. Narwid, Robert L. Nolen, Roger C. Strickland, Albert I. Meyers, and Eric W. Collington

Subjects
Alkylation, Chemistry, business.industry, Acylation, Hydrolysis, Organic Chemistry, Total synthesis, Computational biology, Models, Structural, Text mining, Cyclization, Methods, Camptothecin, business
Published
1973

58. Spectroscopic and Photometric Observations of Kepler Asteroseismic Targets

Author

J. Molenda-Żakowicz, M. Jerzykiewicz, G. Kopacki, A. Frasca, G. Catanzaro, D. W. Latham, E. Niemczura, A. Narwid, M. Stȩślicki, T. Arentoft, J. Kubat, D. Drobek, W. Dimitrow, Joyce Ann Guzik, and Paul A. Bradley

Subjects
Physics, Field (physics), Astronomy, FOS: Physical sciences, Field of view, Astrophysics::Cosmology and Extragalactic Astrophysics, Kepler, Photometry (optics), Radial velocity, Stars, Astrophysics - Solar and Stellar Astrophysics, Spitzer Space Telescope, Astrophysics::Solar and Stellar Astrophysics, Astrophysics::Earth and Planetary Astrophysics, Variable star, Astrophysics::Galaxy Astrophysics, Solar and Stellar Astrophysics (astro-ph.SR)
Abstract

We summarize our ground-based program of spectroscopic and photometric observations of the asteroseismic targets of the Kepler space telescope. We have already determined atmospheric parameters, projected velocity of rotation, and radial velocity of 62 Kepler asteroseismic targets and 33 other stars in the Kepler field of view. We discovered six single-lined and two double-lined spectroscopic binaries, we determined the interstellar reddening for 29 stars in the Kepler field of view, and discovered three delta Sct, two gamma Dor and 14 other variable stars in the field of NGC 6866., Comment: 4 pages, 4 figures. Stellar Pulsation: Challenges for Theory and Observation, Santa Fe, NM (USA), May 31 - June 5, 2009

59. Photometric multi-site campaign on the open cluster NGC 884: I. Detection of the variable stars

Author

Saesen S., Carrier F., Pigulski A., Aerts C., Handler G., Narwid A., Fu J.N., Zhang C., Jiang X.J., Vanautgaerden J., Kopacki G., St?slicki M., Acke B., Poretti E., Uytterhoeven K., Gielen C., Ostensen R., De Meester W., Reed M.D., Kolaczkowski Z., Michalska G., Schmidt E., Yakut K., Leitner A., Kalomeni B., Cherix M., Spano M., Saskia Prins, Van Helshoecht V., Zima W., Huygen R., Vandenbussche B., Lenz P., Ladjal D., Antolín E.P., Verhoelst T., De Ridder J., Niarchos P., Liakos A., Lorenz D., Dehaes S., Reyniers M., Davignon G., L, Kim S., Kim D.H., J, Lee Y., U, Lee C., H, Kwon J., Broeders E., VanWinckel H., Vanhollebeke E., Waelkens C., Raskin G., Blom Y., Eggen J.R., Degroote P., Beck P., Puschnig J., Schmitzberger L., Gelven G.A., Steininger B., Blommaert J., Drummond R., Briquet M., and Debosscher J.

60. Multi-Ring Structure of the Eclipsing Disk in EE Cep - Possible Planets?

Author

Galan, C., Mikolajewski, M., Tomov, T., Swierczynski, E., Wiecek, M., Brozek, T., Maciejewski, G., Wychudzki, P., Marcin Hajduk, Rozanski, P. T., Ragan, E., Budzisz, B., Dobierski, P., Frackowiak, S., Kurpinska-Winiarska, M., Winiarski, M., Zola, S., Ogloza, W., Kuzmicz, A., Drozdz, M., Kuligowska, E., Krzesinski, J., Szymanski, T., Siwak, M., Kundera, T., Staels, B., Hopkins, J., Pye, J., Elder, L., Myers, G., Dimitrov, D., Popov, V., Semkov, E., Peneva, S., Kolev, D., Iliev, I., Barzova, I., Stateva, I., Tomov, N., Dvorak, S., Miller, I., Brat, L., Niarchos, P., Liakos, A., Gazeas, K., Pigulski, A., Kopacki, G., Narwid, A., Majewska, A., Steslicki, M., Niemczura, E., Ogmen, Y., Oksanen, A., Kucakova, H., Lister, T. A., Heras, T. A., Dapergolas, A., Bellas-Velidis, I., Kocian, R., and Majcher, A.

Subjects
Astrophysics - Solar and Stellar Astrophysics, Mathematics::History and Overview, Astrophysics::Solar and Stellar Astrophysics, FOS: Physical sciences, Astrophysics::Earth and Planetary Astrophysics, Astrophysics::Galaxy Astrophysics, Solar and Stellar Astrophysics (astro-ph.SR)
Abstract

The photometric and spectroscopic observational campaign organized for the 2008/9 eclipse of EE Cep revealed features, which indicate that the eclipsing disk in the EE Cep system has a multi-ring structure. We suggest that the gaps in the disk can be related to the possible planet formation., Comment: 6 pages, 6 figures, contribution to the conference proceedings: Binaries - Key to Comprehension of the Universe, Brno, Czech Republic, 8-12 Jul. 2009

61. Ground-based observations of Kepler asteroseismic targets

Author

Uytterhoeven, K., Szabo, R., Southworth, J., Randall, S., Ostensen, R., Molenda-Zakowicz, J., Marconi, M., Kurtz, D. W., Kiss, L., Gutierrez-Soto, J., Frandsen, S., Cat, P., Bruntt, H., Briquet, M., Zhang, X. B., Telting, J. H., Steslicki, M., Ripepi, V., Pigulski, A., Paparo, M., Oreiro, R., Ngeow, C., Niemczura, E., Nemec, J., Narwid, A., Mathias, P., Martin-Ruiz, S., Lehmann, H., Kopacki, G., Karoff, C., Jackiewicz, J., Ireland, M., Huber, D., Henden, A. A., Handler, G., Grigahcene, A., Green, E. M., Garrido, R., Fox Machado, L., Debosscher, J., Creevey, O. L., Catanzaro, G., Bognar, Z., Katia Biazzo, and Bernabei, S.

Subjects
Astrophysics - Solar and Stellar Astrophysics, FOS: Physical sciences, Solar and Stellar Astrophysics (astro-ph.SR)
Abstract

We present the ground-based activities within the different working groups of the Kepler Asteroseismic Science Consortium (KASC). The activities aim at the systematic characterization of the 5000+ KASC targets, and at the collection of ground-based follow-up time-series data of selected promising Kepler pulsators. So far, 36 different instruments at 31 telescopes on 23 different observatories in 12 countries are in use, and a total of more than 530 observing nights has been awarded. (Based on observations made with the Isaac Newton Telescope, William Herschel Telescope, Nordic Optical Telescope, Telescopio Nazionale Galileo, Mercator Telescope (La Palma, Spain), and IAC-80 (Tenerife, Spain). Also based on observations taken at the observatories of Sierra Nevada, San Pedro Martir, Vienna, Xinglong, Apache Point, Lulin, Tautenburg, Loiano, Serra la Nave, Asiago, McDonald, Skinakas, Pic du Midi, Mauna Kea, Steward Observatory, Mt Wilson, Bialkow Observatory of the Wroclaw University, Piszkesteto Mountain Station, Observatoire de Haute Provence, and Centro Astronomico Hispano Aleman at Calar Alto. Based on data from the AAVSO International Database.), Comment: 4 pages, Astronomische Nachrichten, HELASIV Conference, Lanzarote, February 2010, submitted

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