Zobrazeno 1 - 10
of 456
pro vyhledávání: '"Nedialkov P"'
Autor:
Sholukhova, O. N., Tikhonov, N. A., Solovyeva, Y. N., Sarkisian, A. N., Vinokurov, A. S., Valcheva, A. T., Nedialkov, P. L., Bizyaev, D. V., Williams, B. F., Ivanov, V. D.
We have selected candidate massive stars in the galaxy IC 342 based on archival images from the Hubble Space Telescope and images from the 2 m telescope at the Natioal Astronomical Observatory Rozhen, Bulgaria. Spectral observations of 24 out of 27 s
Externí odkaz:
http://arxiv.org/abs/2406.15270
Publikováno v:
Molbank, Vol 2024, Iss 3, p M1879 (2024)
Herein we report the synthesis of three novel sulfonamide derivatives of trimetazidine—medication primarily used to treat angina pectoris. The new compounds have been fully characterized with their melting point, 1H- and 13C-NMR, UV, and mass spect
Externí odkaz:
https://doaj.org/article/0f2064c56cb24a1b8da90c572f04303f
Publikováno v:
Pharmacia, Vol 71, Iss , Pp 1-11 (2024)
A validated UHPLC-HRMS method was developed to identify and quantify polar phenolic metabolites in the EtOH extract from H. aucheri Jaub. & Spach’s aerial parts. The external standards, chlorogenic acid, mangiferin, and hyperoside were selected in
Externí odkaz:
https://doaj.org/article/e29a5c557f274ce7b169501d0ad71041
Autor:
Solovyeva, Y., Vinokurov, A., Sarkisyan, A., Kostenkov, A., Atapin, K., Fabrika, S., Oparin, D., Valeev, A., Bizyaev, D., Nedialkov, P., Spiridonova, O.
Publikováno v:
Monthly Notices of the Royal Astronomical Society, Volume 507, Issue 3, pp.4352-4366, 2021
We continue to search for LBV stars in galaxies outside the Local Group. In this work, we have investigated four luminous stars in NGC 4449. Multiple spectral observations carried out for J122810.94+440540.6, J122811.70+440550.9, and J122809.72+44051
Externí odkaz:
http://arxiv.org/abs/2208.05892
Publikováno v:
Molbank, Vol 2024, Iss 3, p M1877 (2024)
The unusual reactivity of key enamine intermediates led to the formation of 3-methylamino-2-(2-nitrobenzoyl)-4H-naphthalen-1-one as an unexpected product in an attempted synthesis of the P. aeruginosa metabolite 2-benzyl-4(1H)-quinolone. Although the
Externí odkaz:
https://doaj.org/article/9a0b3a972d174ee79f5e102e83b032c1
Publikováno v:
Molbank, Vol 2024, Iss 2, p M1830 (2024)
In this study, we report the synthesis of (±)-2-chloro-N-(4-methyl-2-oxo-2H-chromen-7-yl)-2-phenylacetamide through the reaction of 7-amino-4-methyl-2H-chromen-2-one with (±)-2-chloro-2-phenylacetyl chloride. The in vitro anti-inflammatory activity
Externí odkaz:
https://doaj.org/article/ce31d93960064aa6a5cdd5fbed60de16
Autor:
Tikhonov, Nickolay, Galazutdinova, Olga, Karataeva, Gulnara, Sholukhova, Olga, Ivanov, Valentin, Valcheva, Antoniya, Nedialkov, Petko
A search for a correlation between the luminosities of the brightest stars and luminosities of their host galaxies was carried out on archived Hubble Space Telescope (HST) F606W or F555W (V) and F814W (I) images of about 150 nearby galaxies. The samp
Externí odkaz:
http://arxiv.org/abs/2112.09917
Autor:
Sarkisyan, A., Sholukhova, O., Fabrika, S., Valeev, A., Valcheva, A., Nedialkov, P., Tatarnikov, A.
We study Luminous Blue Variable (LBV) candidate J004341.84+411112.0 in the Andromeda galaxy. We present optical spectra of the object obtained with the 6-m telescope of SAO RAS. The candidate shows typical LBV features in its spectra: broad and stron
Externí odkaz:
http://arxiv.org/abs/2111.09148
Autor:
Minev, M., Ivanov, V. D., Trifonov, T., Ovcharov, E., Fabrika, S., Sholukhova, O., Vinokurov, A., Valcheva, A., Nedialkov, P.
We report here the first results from a 15-yr long variability monitoring of the z=2.0 quasar QSO B1312+7837. It shows luminosity changes with a period P~6.13 yr (P~2.04 yr at rest frame) and an amplitude of ~0.2mag, superimposed on a gradual dimming
Externí odkaz:
http://arxiv.org/abs/2109.13817
Publikováno v:
Molbank, Vol 2024, Iss 2, p M1802 (2024)
Herein, we report the synthesis of N-(3-chlorophenethyl)-4-nitrobenzamide in the reaction between 2-(3-chlorophenyl)ethan-1-amine and 4-nitrobenzoyl chloride. The newly obtained bio-functional hybrid molecule was fully characterized via 1H, 13C NMR,
Externí odkaz:
https://doaj.org/article/7ba39f75c4e24c91a6c6dbfdd3bf5ae9