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1.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Bolsunovskii A.Y., Degermendzhi A.G.
Заглавие : Comparison of mobility of uranium and technogenic radionuclides in bottom sediments of the Yenisei River
Место публикации : Dokl. Earth Sci.: MAIK NAUKA/INTERPERIODICA/SPRINGER, 2013. - Vol. 448, Is. 2. - С. 221-224. - 4. - ISSN 1028-334X, DOI 10.1134/S1028334X13020116
Примечания : Cited References: 10. - The authors are grateful to A.M. Zhizhaeva, A.I. Rubailo (Institute of Chemistry and Chemical Technology, Siberian Branch, Russian Academy of Sciences), and Yu. V. Aleksandrov (Institute of Biophysics, Siberian Branch, Russian Academy of Sciences) for analytical investigations. This study was supported by the Russian Foundation for Basic Research, project no. 12-05-00078.
Предметные рубрики: ELEMENTS
PLANTS
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2.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Zotina T.A., Bolsunovsky A.Y., Bondareva L.G.
Заглавие : Accumulation of Am-241 by suspended matter, diatoms and aquatic weeds of the Yenisei River
Место публикации : J. Environ. Radioact.: ELSEVIER SCI LTD, 2010. - Vol. 101, Is. 2. - С. 148-152. - 5. - ISSN 0265-931X, DOI 10.1016/j.jenvrad.2009.09.009
Примечания : Cited References: 26
Предметные рубрики: RADIONUCLIDES
PLUTONIUM
ELEMENTS
ACTINIDES
PLANTS
Ключевые слова (''Своб.индексиров.''): activity concentration--americium--aquatic plant--asterionella formosa--concentration factor--diatoma vulgare--diatoms--elodea canadensis--seston
Аннотация: In this work we experimentally estimated the capacities of the key components of the Yenisei River (Russia): particulate suspended matter (seston), diatom microalgae, and submerged macrophytes for accumulating Am-241 from water. In our experiments large particles of seston (8 mu m), comparable in size with diatoms, took up most of americium from water. The accumulation of americium by isolated diatom algae (Asterionella formosa and Diatoma vulgare) was lower than by total seston. The concentration factors (CFs) of Am-241 for seston of the Yenisei River in our experiments were (2.8-6.9).10(5); for diatoms -(1.5-4.2)-10(4). The Us for aquatic plant Elodea canadensis were within the same order of magnitude as those for diatoms. Activity concentration and CFs of Am-241 were nearly the same in experiments under dark and light conditions. This is indicative of an energy independent mechanism of americium uptake from the water by diatoms and submerged macrophytes. (C) 2009 Elsevier Ltd. All rights reserved.
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3.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Antipina L.Y., Tomilin F.N., Vysotskii E.S., Ovchinnikov S.G.
Заглавие : A QUANTUM CHEMICAL STUDY OF THE FORMATION OF 2-HYDROPEROXY-COELENTERAZINE IN THE Ca2+-REGULATED PHOTOPROTEIN OBELIN
Колич.характеристики :6 с
Место публикации : J. Struct. Chem.: SPRINGER, 2011. - Vol. 52, Is. 5. - С. 870-875. - ISSN 0022-4766
Примечания : Cited References: 19. - The work was supported by RFBR (07-04-00930-a), the "Molecular and Cell Biology" Program of the Presidium of the Russian Academy of Sciences, and the Program of the Siberian Division of the Russian Academy of Sciences (project No. 2) within the implementation of the Federal Targeted Program "Scientific and Scientific Pedagogical Personnel of Innovative Russia, 2010" (P333 and P213).
Предметные рубрики: CALCIUM-DISCHARGED OBELIN
SEMIEMPIRICAL METHODS
1.7 ANGSTROM
OPTIMIZATION
PARAMETERS
MECHANISM
FLUORESCENCE
ELEMENTS
PROTEIN
EMITTER
Ключевые слова (''Своб.индексиров.''): coelenterazine--2-hydroperoxy-coelenterazine--obelia longissima--renilla muelleri
Аннотация: The Ca2+-regulated photoprotein obelin determines the luminescence of the marine hydroid Obelia longissima. Bioluminescence is initiated by calcium and appears as a result of the oxidative decarboxylation related to the coelenterazine substrate. The luciferase of the luminescent marine coral Renilla muelleri (RM) also uses coelenterazine as a substrate. However, three proteins are involved in the in vivo bioluminescence of these animals: luciferase, green fluorescent protein, and Ca2+-regulated coelenterazine-binding protein (CBP). In fact, CBP that contains one strongly bound coelenterazine molecule is the RM luciferase substrate in the in vivo bioluminescent reaction. Coelenterazine becomes available for oxygen and the reaction with luciferase only after binding CBP with calcium ions. Unlike Ca2+-regulated photoproteins, the coelenterazine molecule is not activated by oxygen in the CBP molecule. In this work, by means of quantum chemical methods the behavior of substrates in these proteins is analyzed. It is shown that coelenterazine can form different tautomers: CLZ(2H) and CLZ(7H). The formation of 2-hydroperoxy-coelenterazine is studied. According to the obtained data, these proteins use different forms of the substrates for the reaction. In obelin, the substrate is in the CLZ(2H) form that affords hydrogen peroxide. In RM, coelenterazine is in the CLZ(7H) form, and therefore, CBP is not activated by oxygen.
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4.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Zotina T.A., Trofimova E.A., Dementyev D.V., Bolsunovsky A.Y.
Заглавие : Bioaccumulation, inter-organ distribution, and retention of waterborne and dietary Am-241 in silver crucian carp
Колич.характеристики :12 с
Место публикации : Toxicol Environ. Chem.: TAYLOR & FRANCIS LTD, 2014. - Vol. 96, Is. 2. - С. 243-254. - ISSN 0277-2248, DOI 10.1080/02772248.2014.941368. - ISSN 1029-0486
Примечания : Cited References: 25
Предметные рубрики: YENISEI RIVER
TELEOST FISH
RADIONUCLIDES
METALS
AMERICIUM
EXPOSURE
ELEMENTS
ASSIMILATION
ELASMOBRANCH
DEPURATION
Ключевые слова (''Своб.индексиров.''): americium-241--assimilation--carassius auratus gibelio--force-feeding
Аннотация: The bioaccumulation of actinide Am-241 from food and water in bodies of freshwater fish (Carassius auratus gibelio, silver crucian carp) has been investigated in laboratory experiments. Homogenized biomass of submerged macrophytes labeled with Am-241 was injected into the fish gullet. Internal organs and tissues of crucian carp could be ranked according to activity concentration of dietary Am-241 after depuration of the digestive tract as follows: liver gonads bones muscles. Accumulation of waterborne Am-241 in internal organs and tissues of crucian carp mainly occurred via the digestive tract. While the concentration of Am-241 in liver of crucian carps decreased during depuration time, its concentration in bones increased indicating slower transfer of Am-241 to skeleton compared to muscles and liver. The retention of dietary Am-241 in the bodies of crucian carp reached 35%-46% of ingested Am-241: 20%-31% was retained in liver, 0.6%-0.8% in skeleton, and 1.4%-2.0% in muscles. The concentration factor of Am-241 from water was 0.4 for the whole body, 0.3 for liver, 0.01 for muscles, and 0.01 for skeleton. Trace amounts of Am-241 were recorded in viscera and muscles of a wild population of silver crucian carp inhabiting a radioactively contaminated part of the Yenisei River.
WOS,
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5.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kalyabina V. P., Esimbekova E. N., Torgashina I. G., Kopylova K. V., Kratasyuk V. A.
Заглавие : Principles for Construction of Bioluminescent Enzyme Biotests for Analysis of Complex Media
Колич.характеристики :4 с
Коллективы : Government of Krasnoyarsk Territory; Krasnoyarsk Regional Fund of Science; RFBR [18-44-242003]
Место публикации : Dokl. Biochem. Biophys.: MAIK NAUKA/INTERPERIODICA/SPRINGER, 2019. - Vol. 485, Is. 1. - С. 107-110. - ISSN 1607-6729, DOI 10.1134/S1607672919020042. - ISSN 1608-3091(eISSN)
Примечания : Cited References:10. - The study was supported by the Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science and RFBR (project no. 18-44-242003).
Предметные рубрики: VEGETABLES
ELEMENTS
Аннотация: In this study, we formulated the principles of designing bioluminescent enzyme tests for assessing the quality of complex media, which consist in providing the maximum sensitivity to potentially toxic chemicals at a minimal impact of uncontaminated complex media. The developed principles served as a basis for designing a new bioluminescent method for an integrated rapid assessment of chemical safety of fruits and vegetables, which is based on using the luminous bacteria enzymes (NAD(P)H:FMN oxidoreductase and luciferase) as a test system.
WOS,
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Scopus
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6.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Bolsunovsky, A. Ya., Dementyev D. V., Vakhrushev V. I.
Заглавие : Transport of Artificial Radionuclides over Long Distances Downstream along the Yenisei River during the 1966 Extreme Flood Event
Колич.характеристики :5 с
Коллективы : Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR) [18-44-240001]
Место публикации : Dokl. Earth Sci.: MAIK NAUKA/INTERPERIODICA/SPRINGER, 2021. - Vol. 498, Is. 2. - С. 514-518. - ISSN 1028-334X, DOI 10.1134/S1028334X21060052. - ISSN 1531-8354(eISSN)
Примечания : Cited References:12. - This study was supported in part by the Russian Foundation for Basic Research, project no. 18-44-240001.
Предметные рубрики: SEDIMENTS
ELEMENTS
Аннотация: Long-term research has revealed layers with abnormally high concentrations of Cs-137 in bottom sediments and alluvial soils in the floodplain of the Yenisei River at various distances (as far as 820 km) downstream from the radioactive discharge point of the Mining-and-Chemical Combine (MCC) of Rosatom. The highest activity concentration of Cs-137 in these layers reached 26 000 Bq/kg, which was higher than the Cs-137 maximum at the well-known radioactive anomaly in the Yeniseisk riparian zone (330 km downstream from the MCC), which was formed during the 1966 extreme flood event. The radionuclide composition and the Cs-137/Eu-152 and Cs-137/Co-60 ratios in the anomalous layers studied were the same as those at the Yeniseisk anomalous site, suggesting that they had the same origin by the transport of sediments from the MCC area during the 1966 extreme flood event. The transport of radioactive bottom sediments over long distances from the MCC discharge point downstream along the Yenisei River during the 1966 extreme flood event may continue to pose a possible radiation hazard to the river ecosystem and residents of riverside villages.
WOS
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