Zobrazeno 1 - 10
of 123
pro vyhledávání: '"A. L. Mikhal'chuk"'
Publikováno v:
Russian Electrical Engineering. 89:571-575
The calculated power characteristics of the traction drive of the 2ES5K electric locomotive have been considered in the middle of a feeder zone of the overhead contact system. The traction drive with the developed converter of input electric resistan
Publikováno v:
Doklady Chemistry. 424:43-48
Autor:
T. F. Raĭchenok, Sergei A. Tikhomirov, V. L. Dubovskiĭ, G. B. Tolstorozhev, A. L. Mikhal'chuk, Olga V. Gulyakevich
Publikováno v:
Optics and Spectroscopy. 104:875-885
The spectral and kinetic properties of an immunoactive 8-azasteroid and a product of its photochemical transformation are studied by the methods of steady-state and transient spectroscopy. It is found that the spectral features of the studied compoun
Autor:
Olga V. Gulyakevich, A. L. Mikhal'chuk
Publikováno v:
Chemistry of Heterocyclic Compounds. 44:253-262
The mechanism was established for annelation ([2+4] cyclocondensation) of Schiff bases or azomethines by β-dicarbonyl and β,β′-tricarbonyl compounds in amphiprotic media. The condensation was found to be a self-catalyzed pericyclic process achie
Publikováno v:
Journal of Fluorescence. 18:277-283
This paper presents the results of the investigation of the spectral-luminescent characteristics of 12-oximino derivative of 8-aza-D-homogona-12,17a-dion, its hydrochloride, and their dependences on the concentration. It has been shown that the form
Autor:
A. L. Mikhal’chuk, O. V. Gulyakevich
Publikováno v:
Doklady Chemistry. 415:155-160
Publikováno v:
Chemistry of Heterocyclic Compounds. 43:334-346
The reaction of 16,16-dimethyl-8-aza-D-1,3,5(10),13-tetraene-12,17a-dione (3,3-dimethyl-3,4,6,7,11b, 12-hexahydro-1H-[2.1-a]1,13(2H)-dione) with hydroxylamine and methoxyamine in ethanol gives the 12-methoxyamino and 12-methoxyamino derivatives. The
Autor:
Sergei A. Tikhomirov, V. L. Dubouski, T. F. Raĭchenok, G. B. Tolstorozhev, A. L. Mikhal'chuk, Olga V. Gulyakevich
Publikováno v:
Optics and Spectroscopy. 101:882-888
The spectral and luminescent properties of compounds from the class of immunoactive 8-azaster-oids, 2,3-dimethoxy-8-aza-D-homogona-1,3,5(10),13-tetraene-12,17a-dione and its 9,11 dehydroderivative, are studied by the methods of steady-state spectrosc
Autor:
A. L. Mikhal’chuk, O. V. Gulyakevich
Publikováno v:
Doklady Chemistry. 409:106-112
Autor:
G. B. Tolstorozhev, A. L. Mikhal'chuk, Sergei A. Tikhomirov, V. L. Dubouski, T. F. Raĭchenok, Olga V. Gulyakevich
Publikováno v:
Optics and Spectroscopy. 100:848-853
The effect of acid-base interactions on the photophysical properties of 6,7-dimethoxy-3,4-dihydroisoquinoline in protic solvents is studied by the methods of steady-state and picosecond spectroscopy. It is found that the specific features of the spec