Zobrazeno 1 - 10
of 27
pro vyhledávání: '"O. Vasilkova"'
Autor:
A. V. Nikulin, A. A. Meshcheryakova, A. E. Sklyar, N. O. Vasilkova, V. V. Sorokin, A. P. Krivenko
Publikováno v:
Russian Journal of Organic Chemistry. 57:1650-1655
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f276ec04c9e1020da8ce051b703ebd4c
https://doi.org/10.1134/s1070428021100134
https://doi.org/10.1134/s1070428021100134
Publikováno v:
Russian Journal of Organic Chemistry. 56:990-993
Three-component condensations of ethyl acetoacetate with 1,3-thiazol-2-amine and aromatic aldehydes in isopropyl alcohol at 20°C under ultrasonic activation lead to the formation of ethyl 5-aryl-7-methyl-5H-[1,3]thiazolo[3,2-a]pyrimidine-6-carboxyla
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::23c1335572d8bdccb1b62ca3645bdb1e
https://doi.org/10.1134/s1070428020060044
https://doi.org/10.1134/s1070428020060044
Publikováno v:
Russian Journal of Organic Chemistry. 55:995-998
The condensation of malononitrile with unsymmetrical dienones of the cyclohexane series under basic conditions selectively afforded substituted tetrahydroquinolinecarbonitriles. The reaction of 2,6-bis-(3-nitrophenylmethylidene)cyclohexan-1-one with
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::981d707a49726ec40f746b182d62a1b5
https://doi.org/10.1134/s1070428019070145
https://doi.org/10.1134/s1070428019070145
Publikováno v:
SAKHAROV READINGS 2020: ENVIRONMENTAL PROBLEMS OF THE XXI CENTURY.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::59ba9456ec39242de7a6af966d5f770a
https://doi.org/10.46646/sakh-2020-1-237-240
https://doi.org/10.46646/sakh-2020-1-237-240
Publikováno v:
Astrophysics. 61:444-457
The variability of the components A and B of the visual binary system 61 Cyg is analyzed. The observations were made on the normal astrograph of the Pulkovo Observatory from 1956 through 1982 (a total of 296 brightness estimates). A search was undert
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3259b7790d5b95c8106822b05c6c9bf4
https://doi.org/10.1007/s10511-018-9549-2
https://doi.org/10.1007/s10511-018-9549-2
Publikováno v:
Astrophysics. 60:507-519
Observations of stars close to the sun which, in terms of their physical properties, are possible objects for space missions aimed at searching for planetary components, are made at the Pulkovo Observatory. In this paper we present new orbital elemen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fd35807e665cade73af2cd6c92800d5c
https://doi.org/10.1007/s10511-017-9502-9
https://doi.org/10.1007/s10511-017-9502-9
Autor:
Eduardo Fernández-Lajús, C. Quiñones, Alessandro Marchini, Eugenii N. Sokov, M. Bretton, C. R. Knight, I. A. Sokova, Olga O. Vasilkova, D. L. Gorshanov, C. Girardini, C. Colazo, Romina Paula Di Sisto
The asteroid (2121) Sevastopol is a binary asteroid from the main belt. The duplicity of the asteroid was discovered based on photometric observations of mutual phenomena (eclipses and occultations) that were detected in its light curves (Higgins et
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::025ad9180fc82cb90f9e061a9fac2caf
http://hdl.handle.net/11365/1083727
http://hdl.handle.net/11365/1083727
Publikováno v:
Chemistry. Biology. Ecology. 16:5-8
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::47a4ea3c9321ba41f60c8e00835756be
https://doi.org/10.18500/1816-9775-2016-16-1-5-8
https://doi.org/10.18500/1816-9775-2016-16-1-5-8
Publikováno v:
Solar System Research. 50:56-66
A list of selected binary stars is presented that have been observed for several decades using a 26-inch refractor at the Pulkovo Observatory. These stars are at a distance from 3.5 to 25 pc from the Sun. They belong to spectral classes F, G, K, and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f675a3aae5fad3fcf38fed26ccd5fcdd
https://doi.org/10.1134/s0038094616010044
https://doi.org/10.1134/s0038094616010044
Autor:
I. S. Izmailov, A. A. Kiselev, E. A. Roschina, D. L. Gorshanov, N. A. Shakht, T. A. Vasil’eva, L. G. Romanenko, O. A. Kalinichenko, O. V. Kiyaeva, O. O. Vasilkova
Publikováno v:
Astronomy Reports. 58:78-97
The results of long-term, uniform, photographic observations of visual double and multiple stars obtained on the Pulkovo 26″ refractor are presented. Relative positions are calculated for 259 pairs of visual double stars in 194 systems, with the re
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::36bd06b252ed96bdddb3fd857e28d817
https://doi.org/10.1134/s106377291401003x
https://doi.org/10.1134/s106377291401003x