Zobrazeno 1 - 10
of 531
pro vyhledávání: '"V. Sivkov"'
Autor:
A D Kaprin, O I Apolikhin, A V Sivkov, O I Trushina, E G Novikova, S V Mukhtarulina, V S Yudina, P D Lopukhov
Publikováno v:
Эпидемиология и вакцинопрофилактика, Vol 21, Iss 1, Pp 103-109 (2022)
Relevance. The demographic future of our country depends to a large extent on the level of fertility, which is determined by the reproductive health of the population. Aim. To conduct an analysis of the literature on the problems of reproductive heal
Externí odkaz:
https://doaj.org/article/c1d44a19143940639d821207538c0f9c
Autor:
V. Sivkov, E. Bubnova
Publikováno v:
Ocean Science, Vol 17, Pp 1421-1435 (2021)
A suspended particulate matter distribution against a hydrographical background was studied at the oceanographic transect across the equatorial Atlantic in the year 2000. An area of abnormally high suspended matter volume concentrations was found abo
Externí odkaz:
https://doaj.org/article/dc581b29259e4e29a554c4d1d91e2dfb
Autor:
Nadezhda A. Zhuk, Boris A. Makeev, Maria G. Krzhizhanovskaya, Sergey V. Nekipelov, Danil V. Sivkov, Ksenia A. Badanina
Publikováno v:
Crystals, Vol 13, Iss 8, p 1202 (2023)
The phase formation process of Bi2Cr1/6Mn1/6Fe1/6Co1/6Ni1/6Cu1/6Nb2O9+Δ containing 3d-ions of transition elements in equimolar quantities was studied in a wide temperature range (400–1050 °C). The complex oxide crystallizes in the structural type
Externí odkaz:
https://doaj.org/article/a79265fadbff45b188aeda7417db3227
Autor:
Sergey V. Nekipelov, Victor N. Sivkov, Danil V. Sivkov, Alexey M. Lebedev, Ratibor G. Chumakov, Aleksandra V. Koroleva, Boris A. Makeev, Nadezhda A. Zhuk
Publikováno v:
Inorganics, Vol 11, Iss 7, p 285 (2023)
The effect of Zn-doping on the phase composition and optical properties of the Bi2ZnxFe1-xTa2O9.5-Δ (x = 0.3, 0.5, 0.7) was studied. XRD data showed that the samples crystallize in the structural type of pyrochlore (sp. gr.Fd-3m). For all the sample
Externí odkaz:
https://doaj.org/article/9833b3e70d4c43f09bef474331c7c295
Autor:
Nadezhda A. Zhuk, Maria G. Krzhizhanovskaya, Nikolay A. Sekushin, Vladislav V. Kharton, Alexandra V. Koroleva, Sergey V. Nekipelov, Danil V. Sivkov, Viktor N. Sivkov, Boris A. Makeev, Alexey M. Lebedev, Ratibor G. Chumakov, Sofia Yu. Kovalenko
Publikováno v:
ACS Omega, Vol 6, Iss 36, Pp 23262-23273 (2021)
Externí odkaz:
https://doaj.org/article/734e8585f94f48c3b30a33e5f47e7094
Autor:
Vitaliy A. Muravyov, Maria G. Krzhizhanovskaya, Boris A. Makeev, Andrey N. Nizovtsev, Sergey V. Nekipelov, Viktor N. Sivkov, Danil V. Sivkov, Nadezhda A. Zhuk
Publikováno v:
Crystals, Vol 13, Iss 3, p 474 (2023)
The possibility of high-temperature solid-phase synthesis of Ni-doped bismuth tantalate pyrochlore, not only from the oxide compounds BiTaO4 and NiO but also using nickel chloride NiCl2 as a precursor, was shown for the first time. The concentration
Externí odkaz:
https://doaj.org/article/518dcbcbc2f64424b445cd20f1718034
Autor:
N. A. Zhuk, M. G. Krzhizhanovskaya, A. V. Koroleva, V. G. Semenov, A. A. Selyutin, A. M. Lebedev, S. V. Nekipelov, D. V. Sivkov, V. V. Kharton, V. P. Lutoev, B. A. Makeev
Publikováno v:
Inorganics, Vol 11, Iss 1, p 8 (2022)
The effect of Fe and Mg-codoping on the crystal structure, optical and dielectric properties of bismuth tantalate-based pyrochlores has been studied. Samples of Bi2MgxFe1−xTa2O9.5−Δ (x ≤ 0.7) are characterized by a porous dendrite-like microst
Externí odkaz:
https://doaj.org/article/eaa72409d0374e628aee68d8cd66b616
Autor:
Olga V. Petrova, Danil V. Sivkov, Sergey V. Nekipelov, Alexander S. Vinogradov, Petr M. Korusenko, Sergey I. Isaenko, Roman N. Skandakov, Ksenia A. Bakina, Viktor N. Sivkov
Publikováno v:
Applied Sciences, Vol 13, Iss 1, p 128 (2022)
The results of studies of marine sponge carbonization processes during thermal treatment in an argon atmosphere in the temperature range from room temperature to 1200 °C are presented. The spatial structure, atomic composition of native and carboniz
Externí odkaz:
https://doaj.org/article/84adb3de46a946d7b20be1754e4b74bb
Publikováno v:
Data in Brief, Vol 37, Iss , Pp 107198- (2021)
We present the multibeam bathymetry data of the western part of the Romanche Trench (Equatorial Atlantic) which is the main natural corridor that regulates inflow of Antarctic Bottom Water into the eastern basin of the Atlantic Ocean. Multibeam bathy
Externí odkaz:
https://doaj.org/article/4585329dc4ba47a0bd52ba8af0e5b787
Autor:
Danil V. Sivkov, Olga V. Petrova, Sergey V. Nekipelov, Alexander S. Vinogradov, Roman N. Skandakov, Ksenia A. Bakina, Sergey I. Isaenko, Anatoly M. Ob’edkov, Boris S. Kaverin, Ilya V. Vilkov, Viktor N. Sivkov
Publikováno v:
Applied Sciences, Vol 12, Iss 15, p 7744 (2022)
The results of the comparative quantitative study of oxygen-containing groups adsorbed on the surface of carbonized sponge scaffold (CSS), highly oriented pyrolytic graphite (HOPG), fullerite C60 and multi-walled carbon nanotubes (MWCNTs) introduced
Externí odkaz:
https://doaj.org/article/2b5ee5fdc09a4f5cbc11fd7c3ac99b64