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Comparison of chronic low-dose effects of alpha- and beta-emitting radionuclides on marine bacteria / M. A. Selivanova [et al.] // Cent. Eur. J. Biol. - 2014. - Vol. 9, Is. 10. - P951-959, DOI 10.2478/s11535-014-0331-0 . - ISSN 1644-3632
Кл.слова (ненормированные):
Am-241 -- Hormesis -- Luminous bacteria -- Peroxides -- Radiotoxicity -- Tritium
Аннотация: Effects of Americium-241 (241Am), alpha-emitting radionuclide of high specific radioactivity, and tritium (3H), beta-emitting radionuclide, on luminous bacteria Photobacterium phosphoreum were compared. Bioluminescence intensity served as a marker of bacterial physiological activity. Three successive stages in the bioluminescence response to 241Am and 3H were found under conditions of lowdose irradiation: (1) absence of effects, (2) activation, and (3) inhibition. They were interpreted in terms of bacterial response to stressfactor as stress recognition, adaptive response/syndrome, and suppression of physiological function (i.e. radiation toxicity). Times of bioluminescence activation (TBA) and inhibition (TBI) were suggested as parameters to characterize hormesis and toxic stages in a course of chronic low-dose irradiation of the microorganisms. Values of TBA and TBI of 241Am were shorter than those of 3H, revealing higher impact of alpha-irradiation (as compared to beta-irradiation) under comparable radiation doses. Increases of peroxide concentration and NADH oxidation rates in 241Am aquatic solutions were demonstrated; these were not found in tritiated water. The results reveal a biological role of reactive oxygen species generated in water solutions as secondary products of the radioactive decay. The study provides a scientific basis for elaboration of bioluminescence-based assay to monitor radiotoxicity of alpha- and beta-emitting radionuclides in aquatic solutions. © 2014 Versita Warsaw and Springer-Verlag Wien.

Scopus
Держатели документа:
Institute of Biophysics SB RAS, 660036 Krasnoyarsk, Russian Federation
Siberian Federal University, 660041 Krasnoyarsk, Russian Federation
Siberian State Technological University, Lesosibirsk, Krasnoyarsk region, Russian Federation : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Selivanova, M.A.; Rozhko, T.V.; Devyatlovskaya, A.N.; Kudryasheva, N.S.

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Bioaccumulation, inter-organ distribution, and retention of waterborne and dietary Am-241 in silver crucian carp [Text] / T. A. Zotina [et al.] // Toxicol Environ. Chem. - 2014. - Vol. 96, Is. 2. - P243-254, DOI 10.1080/02772248.2014.941368. - Cited References: 25 . - ISSN 0277-2248. - ISSN 1029-0486

РУБ Environmental Sciences + Toxicology
Рубрики:
YENISEI RIVER
   TELEOST FISH
   RADIONUCLIDES
   METALS
   AMERICIUM
   EXPOSURE
   ELEMENTS
   ASSIMILATION
   ELASMOBRANCH
   DEPURATION
Кл.слова (ненормированные):
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.

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Держатели документа:
[Zotina, T. A.
Trofimova, E. A.
Dementyev, D. V.
Bolsunovsky, A. Y.] Inst Biophys SB RAS, Krasnoyarsk, Russia
ИБФ СО РАН : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Zotina, T.A.; Trofimova, E.A.; Dementyev, D.V.; Bolsunovsky, A.Y.

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Biosorption of Am-241 from aqueous solutions and its biochemical fractionation in Pleurotus ostreatus mycelium [Text] / D. V. Dementyev [et al.] // Dokl. Biochem. Biophys. - 2015. - Vol. 460, Is. 1. - P34-36, DOI 10.1134/S160767291501010X. - Cited References:11. - This work was supported by the Russian Foundation for Basic Research (project no. 12-04-00915). . - ISSN 1607-6729. - ISSN 1608-3091

РУБ Biochemistry & Molecular Biology + Biophysics
Рубрики:
SACCHAROMYCES-CEREVISIAE
   REMOVAL
   AMERICIUM
   MECHANISM
   BIOMASS

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Держатели документа:
Russian Acad Sci, Inst Biophys, Siberian Branch, Krasnoyarsk 660036, Russia.
ИБФ СО РАН

Доп.точки доступа:
Dementyev, D.V.; Zotina, T.A.; Manukovsky, N.S.; Kalacheva, G.S.; Bolsunovsky, A. Ya.; Russian Foundation for Basic Research [12-04-00915]

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Experimental investigations of 241Am accumulation by macrophytes of the Yenisei River / A. Ya. Bolsunovskij, T. A. Zotina // Radiatsionnaya Biologiya. Radioekologiya. - 2002. - Vol. 42, Is. 2. - С. 200-203 . - ISSN 0869-8031
Кл.слова (ненормированные):
Americium -- Aquaculture -- Biomass -- Ecosystems -- Radioisotopes -- Americium 241 -- Macrophytes -- Radioecological concentration -- The Yenisei river -- River pollution -- americium -- absorption -- article -- biomass -- chemistry -- comparative study -- gamma spectrometry -- metabolism -- plant -- Russian Federation -- time -- water pollutant -- Absorption -- Americium -- Biomass -- Plants -- Siberia -- Spectrometry, Gamma -- Time Factors -- Water Pollutants, Radioactive
Аннотация: Experiments were carried out in which 241Am was added to water samples containing macrophytes of the Yenisei River, and the radionuclide absorption rates and concentration factors were determined for the plants. It has been shown that the water moss (Fontinalis antipyretica) has a higher capacity to accumulate 241Am than the Canadian pondweed (Elodea canadensis) does. The laboratory experiments revealed that the capacity of dead biomass of the Canadian pondweed to accumulate 241Am is twice higher than that of living biomass. In contrast, no significant increase in 241Am accumulation by dead biomass of the water moss has been recorded. The transuranic element 241Am was firmly fixed by the plant biomass and was not released into water in the course of long-duration experiments.

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Держатели документа:
Inst. of Biophysics, Siberian Branch, RAS, Krasnoyarsk, 660036, Russian Federation : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Bolsunovskij, A.Ya.; Zotina, T.A.

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An estimate of the rate of 241Am release from the biomass of aquatic plants of the Enisei river / A. Y. Bolsunovskij, T. A. Zotina, L. G. Bondareva // Doklady Akademii Nauk. - 2003. - Vol. 392, Is. 4. - С. 560-563 . - ISSN 0869-5652
Кл.слова (ненормированные):
Americium -- Aquaculture -- Biomass -- Contamination -- Ecology -- Radioisotopes -- River pollution -- Am release rate -- Americium 241 -- Elodea canadensis -- Enisei river -- Fontinalis antipyretica -- Radioecology -- Biological radiation effects
Аннотация: In the lab experiments (2000-2003) the biomass of Elodea canadelis (water thyme) and Fontinalis antipyretica (water moss) plants was used. The plants were exposed in filtered Enisei water with radionuclide additive in the form of 241Am(NO3)3 solution. The activity (A) was measured with gamma-spectrometer ("Canberra", USA) with ultra-pure germanium detector. The main A release in aqueous medium is observed after long stabilization stage caused by the plant necrosis. Elodea plants in 127 days lost up to 65% of initial A, and moss biomass - 35% in 373 days.

Scopus
Держатели документа:
Inst. Biofiziki SO RAN, Krasnoyarsk, Russian Federation : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Bolsunovskij, A.Y.; Zotina, T.A.; Bondareva, L.G.

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Accumulation of Am-241 by suspended matter, diatoms and aquatic weeds of the Yenisei River [Text] / T. A. Zotina, A. Y. Bolsunovsky, L. G. Bondareva // J. Environ. Radioact. - 2010. - Vol. 101, Is. 2. - P148-152, DOI 10.1016/j.jenvrad.2009.09.009. - Cited References: 26 . - 5. - ISSN 0265-931X

РУБ Environmental Sciences
Рубрики:
RADIONUCLIDES
   PLUTONIUM
   ELEMENTS
   ACTINIDES
   PLANTS
Кл.слова (ненормированные):
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.

Держатели документа:
[Zotina, T. A.
Bolsunovsky, A. Ya.
Bondareva, L. G.] Inst Biophys SB RAS, Krasnoyarsk 660036, Russia : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Zotina, T.A.; Bolsunovsky, A.Y.; Bondareva, L.G.

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Humic substances mitigate the impact of tritium on luminous marine bacteria. Involvement of reactive oxygen species / T. V. Rozhko, O. V. Kolesnik, G. A. Badun [et al.] // International Journal of Molecular Sciences. - 2020. - Vol. 21, Is. 18. - Ст. 6783. - P1-12, DOI 10.3390/ijms21186783 . - ISSN 1661-6596
Кл.слова (ненормированные):
Adaptive response -- Bioassay -- Detoxification -- Hormesis -- Humic substances -- Luminous marine bacterium -- Reactive oxygen species -- Toxicity -- Tritium
Аннотация: The paper studies the combined effects of beta-emitting radionuclide tritium and Humic Substances (HS) on the marine unicellular microorganism—luminous bacteria—under conditions of low-dose radiation exposures (<0.04 Gy). Tritium was used as a component of tritiated water. Bacterial luminescence intensity was considered as a tested physiological parameter. The bioluminescence response of the marine bacteria to tritium corresponded to the “hormesis” model: it included stages of bioluminescence inhibition and activation, as well as the absence of the effect. HS were shown to decrease the inhibition and activation effects of tritium, similar to those of americium-241, alpha-emitting radionuclide, studied earlier. Correlations between the bioluminescence intensity and the content of Reactive Oxygen Species (ROS) were found in the radioactive bacterial suspensions. The results demonstrate an important role of HS in natural processes in the regions of low radioactive contamination: HS can mitigate radiotoxic effects and adaptive response of microorganisms to low-dose radioactive exposures. The involvement of ROS in these processes was demonstrated. © 2020 by the authors. Licensee MDPI, Basel, Switzerland.

Scopus
Держатели документа:
Krasnoyarsk State Medical Academy, Krasnoyarsk, 660022, Russian Federation
Institute of Biophysics SB RAS, Federal Research Center ‘Krasnoyarsk Science Center SB RAS’, Krasnoyarsk, 660036, Russian Federation
Department of Chemistry, Moscow State University, Moscow, 119991, Russian Federation
Biology Department, Irkutsk State University, Irkutsk, 664003, Russian Federation
Biophysics Department, Siberian Federal University, Svobodny 79, Krasnoyarsk, 660041, Russian Federation

Доп.точки доступа:
Rozhko, T. V.; Kolesnik, O. V.; Badun, G. A.; Stom, D. I.; Kudryasheva, N. S.

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Humic Substances Mitigate the Impact of Tritium on Luminous Marine Bacteria. Involvement of Reactive Oxygen Species / T. V. Rozhko, O. V. Kolesnik, G. A. Badun [et al.] // Int. J. Mol. Sci. - 2020. - Vol. 21, Is. 18. - Ст. 6783, DOI 10.3390/ijms21186783. - Cited References:74. - This work was supported by RFBR-Krasnoyarsk Regional Foundation N 18-44-242002, 18-44-240004. . - ISSN 1422-0067

РУБ Biochemistry & Molecular Biology + Chemistry, Multidisciplinary
Рубрики:
IONIZING-RADIATION
OXIDATIVE STRESS
DETOXIFICATION PROCESSES
Кл.слова (ненормированные):
tritium -- humic substances -- luminous marine bacterium -- bioassay -- detoxification -- reactive oxygen species -- toxicity -- adaptive response -- hormesis
Аннотация: The paper studies the combined effects of beta-emitting radionuclide tritium and Humic Substances (HS) on the marine unicellular microorganism-luminous bacteria-under conditions of low-dose radiation exposures (<0.04 Gy). Tritium was used as a component of tritiated water. Bacterial luminescence intensity was considered as a tested physiological parameter. The bioluminescence response of the marine bacteria to tritium corresponded to the "hormesis" model: it included stages of bioluminescence inhibition and activation, as well as the absence of the effect. HS were shown to decrease the inhibition and activation effects of tritium, similar to those of americium-241, alpha-emitting radionuclide, studied earlier. Correlations between the bioluminescence intensity and the content of Reactive Oxygen Species (ROS) were found in the radioactive bacterial suspensions. The results demonstrate an important role of HS in natural processes in the regions of low radioactive contamination: HS can mitigate radiotoxic effects and adaptive response of microorganisms to low-dose radioactive exposures. The involvement of ROS in these processes was demonstrated.

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Держатели документа:
Krasnoyarsk State Med Acad, Krasnoyarsk 660022, Russia.
RAS, Inst Biophys, Fed Res Ctr Krasnoyarsk Sci Ctr, SB, Krasnoyarsk 660036, Russia.
Moscow MV Lomonosov State Univ, Dept Chem, Moscow 119991, Russia.
Irkutsk State Univ, Biol Dept, Irkutsk 664003, Russia.
Siberian Fed Univ, Dept Biophys, Svobodny 79, Krasnoyarsk 660041, Russia.

Доп.точки доступа:
Rozhko, Tatiana V.; Kolesnik, Olga V.; Badun, Gennadii A.; Stom, Devard I.; Kudryasheva, Nadezhda S.; Kudryasheva, Nadezhda; RFBR-Krasnoyarsk Regional Foundation [N 18-44-242002, 18-44-240004]

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A comparative study of biota and sediments as monitors of plutonium in the Yenisei River (Siberia, Russia) / T. A. Zotina, M. S. Melgunov, D. V. Dementyev [et al.] // J. Environ. Radioact. - 2021. - Vol. 237. - Ст. 106723, DOI 10.1016/j.jenvrad.2021.106723. - Cited References:50. - The authors are grateful to the staff of the Radioecology Laboratory (Institute of Biophysics SB RAS, Krasnoyarsk) and the head of the Laboratory, Dr. Alexander Bolsunovsky, for their help in sample collection and processing, to Irina Makarova (Institute of Geology and Mineralogy SB RAS, Novosibirsk) for radiochemical separation of plutonium, and to Elena Krasova for linguistic check and improvements. We also appreciate comments of anonymous reviewers, which allowed us to improve our manuscript. The research was supported by the grants of Russian Foundation for Basic Research, Government of the Krasnoyarsk Territory, and Krasnoyarsk Regional Scientific Foundation No. 20-44-240004 and 18-44-240003, and the State Assignment for Fundamental Research to IBP SB RAS and IGM SB RAS. . - ISSN 0265-931X. - ISSN 1879-1700

РУБ Environmental Sciences
Рубрики:
PU-240/PU-239 ATOM RATIO
ARTIFICIAL RADIONUCLIDES
WATER
Кл.слова (ненормированные):
Americium -- Cesium -- Submerged macrophyte -- Zoobenthos
Аннотация: MOX-fuel production and spent nuclear fuel reprocessing started recently at the Mining-and-Chemical Combine (MCC, Zheleznogorsk, Russia) have caused an increase in controlled releases of plutonium to the Yenisei River. In this study, we analyzed time-dependent trends of plutonium (239,240Pu and 238Pu) in biota and bottom sediments of the Yenisei during 2008-2019, to estimate comparatively the potential of abundant representatives of biota as bio-monitors of contamination of the Yenisei by plutonium. Gamma-emitting radionuclides (40 K; 60Co; 137Cs; 152Eu; 241Am) were measured in environmental samples of the Yenisei as well. Samples of bottom sediments, water moss (Fontinalis antipyretica), shining pondweed (Potamogeton lucens), caddisfly larvae with casings (Apatania crymophila), and amphipods (Eulimnogammarus viridis and Palaseopsis cancelloides) were collected downstream and upstream of the radioactive discharge site. Environmental samples of the Yenisei collected downstream of the radioactive discharge site differed considerably in activity concentrations of plutonium but were similar in time-dependent trends of plutonium, reflecting the trends of annual discharges of plutonium. In 2018, the year of a sharp increase in controlled discharge of plutonium, the concentration of 239,240Pu in water moss (26 Bq kg-1 d.w.) was higher than in sediments (14 Bq kg-1 d.w.). In other years, the highest activity concentration of 2391,240Pu was observed in bottom sediments. In view of the higher magnitude of increase in plutonium concentration, water moss and shining pondweed can be considered as more sensitive indicators of increased fresh releases of plutonium than bottom sediments. Taking into account the food-related mechanism of plutonium uptake by amphipods, this representative of biota can be regarded as a sensitive monitor of bioavailable plutonium in the Yenisei.

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Держатели документа:
Russian Acad Sci, Siberian Branch, Krasnoyarsk Sci Ctr, Inst Biophys,Fed Res Ctr, 50-50 Akademgorodok, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Inst Fundamental Biol & Biotechnol, 79 Svobodny Av, Krasnoyarsk 660041, Russia.
Russian Acad Sci, Siberian Branch, Inst Geol & Mineral, 3 Academician Koptyug Av, Novosibirsk 630090, Russia.

Доп.точки доступа:
Zotina, Tatiana A.; Melgunov, Michail S.; Dementyev, D. V.; Miroshnichenko, L. V.; Alexandrova, Y. V.; Russian Foundation for Basic Research, Government of the Krasnoyarsk Territory; Krasnoyarsk Regional Scientific Foundation [20-44-240004, 18-44-240003]; State Assignment for Fundamental Research

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10.

Effect of low-dose ionizing radiation on luminous marine bacteria: radiation hormesis and toxicity [Text] / N. S. Kudryasheva, T. V. Rozhko // J. Environ. Radioact. - 2015. - Vol. 142. - P68-77, DOI 10.1016/j.jenvrad.2015.01.012. - Cited References:131. - This work was supported by the Russian Foundation for Basic Research, Grant No.13-04-01305a, the Program "Molecular and Cellular Biology" of the Russian Academy of Sciences, project VI 57.1.1. The part of the work (review of effects of americium-241) was supported by the Russian Science Foundation, Grant No. 14-14-00076. . - ISSN 0265-931X. - ISSN 1879-1700

РУБ Environmental Sciences
Рубрики:
RECOMBINANT LUMINESCENT MICROORGANISMS
PHOTOBACTERIUM-LEIOGNATHI
Кл.слова (ненормированные):
Marine bacteria -- Low-dose effects -- Radiation hormesis -- Radiotoxicity -- Reactive oxygen species
Аннотация: The paper summarizes studies of effects of alpha- and beta-emitting radionuclides (americium-241, uranium-235+238, and tritium) on marine microorganisms under conditions of chronic low-dose irradiation in aqueous media. Luminous marine bacteria were chosen as an example of these microorganisms; bioluminescent intensity was used as a tested physiological parameter. Non-linear dose-effect dependence was demonstrated. Three successive stages in the bioluminescent response to americium-241 and tritium were found: 1 - absence of effects (stress recognition), 2 - activation (adaptive response), and 3 - inhibition (suppression of physiological function, i.e. radiation toxicity). The effects were attributed to radiation hormesis phenomenon. Biological role of reactive oxygen species, secondary products of the radioactive decay, is discussed. The study suggests an approach to evaluation of non-toxic and toxic stages under conditions of chronic radioactive exposure. (C) 2015 Elsevier Ltd. All rights reserved.

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Держатели документа:
Inst Biophys SB RAS, Krasnoyarsk 660036, Russia
Siberian Fed Univ, Krasnoyarsk 660041, Russia
Krasnoyarsk State Med Acad, Krasnoyarsk 660022, Russia

Доп.точки доступа:
Kudryasheva, N. S.; Rozhko, T. V.; Russian Foundation for Basic Research [13-04-01305a]; Program "Molecular and Cellular Biology" of the Russian Academy of Sciences [VI 57.1.1]; Russian Science Foundation [14-14-00076]

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11.

Biosorption of 241Am from solution and its biochemical fractionation in the mycelium of macromycetes / D. V. Dementyev [et al.] // Radiochemistry. - 2015. - Vol. 57, Is. 6. - P661-665, DOI 10.1134/S1066362215060144 . - ISSN 1066-3622
Кл.слова (ненормированные):
americium -- fungus mycelium -- sorption
Аннотация: Experiments with macromycetes Pleurotus ostreatus, Neonothopanus nambi, and Agaricus bisporus demonstrated for the first time that live mycelium of mushrooms, cultivated on a liquid culture medium, can efficiently take up dissolved 241Am in its biomass. Biochemical fractionation of the mycelium biomass demonstrated for the first time that the major fraction (up to 90%) of 241Am accumulated in the mycelium is bonded to structural polysaccharides of the cell walls. The sorption capacity of cell wall polysaccharides for 241Am is 2.7-3.6 times higher than that of the initial mycelium biomass, and the activity concentration of 241Am in the polysaccharides reached 950 Bq g-1 dry weight. © 2015 Pleiades Publishing, Inc.

Scopus
Держатели документа:
Institute of Biophysics, Siberian Branch, Russian Academy of Sciences, Akademgorodok 50/50, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Dementyev, D. V.; Zotina, T. A.; Manukovsky, N. S.; Kalacheva, G. S.

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12.

Radioactive particles in the Yenisei River floodplain (Russia): Characterization, leaching and potential effects in the environment / A. Bolsunovsky, M. Melgunov // J. Environ. Radioact. - 2019. - Vol. 208-209, DOI 10.1016/j.jenvrad.2019.105991 . - ISSN 0265-931X
Кл.слова (ненормированные):
Fuel particles -- Incidents at plutonium reactors -- Leaching experiments -- Low doses -- Plant bioassays -- The Yenisei river floodplain -- Aquatic ecosystems -- Aquatic organisms -- Banks (bodies of water) -- Floods -- Fuel gages -- Fuels -- Gamma rays -- Leaching -- Plutonium -- Radiation effects -- Radioactivity -- Radioisotopes -- Flood plains -- Fuel particles -- Leaching experiments -- Low dose -- Plant bioassays -- Rivers -- Elodea canadensis
Аннотация: The operation of the Mining-and-Chemical Combine (MCC), the largest producer of weapons-grade plutonium in Russia, has resulted in radioactive contamination of the Yenisei River floodplain. Investigations carried out in Novosibirsk and Krasnoyarsk institutes have shown that the floodplain of the Yenisei downstream of the MCC is contaminated by radioactive particles (RP) of various types and activities. Analytical characterization of the RP showed that most of them were fuel particles, which were carried into the Yenisei after incidents at the MCC reactors. The plutonium and caesium isotope ratios (238Pu/239,240Pu; 137Cs/134Cs) vary substantially between the particles, indicating different source terms and time intervals when the RP were formed. In addition to fuel RP, there were particles that contained activation radionuclides. The experiment on dissolution of RP using the model solution (the simulated stomach fluid) showed different cumulative extractions of radionuclides from the particles: 60Co and 137Cs extractions were the lowest, the extracted fractions of europium and americium isotopes were the largest, and plutonium occupied an intermediate position. High concentrations of radionuclides in RP are sources of exposure of organisms in aquatic and terrestrial ecosystems to low radiation doses. The plant bioassays of the effects of ?-radiation from RP showed the effect of low doses of ?-radiation on growth parameters of aquatic plant Elodea canadensis growing in the Yenisei River floodplain. The presence of RP from different sources in the Yenisei River floodplain makes this region a unique site for studying environmental effects of the particles. © 2019 Elsevier Ltd

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Держатели документа:
Institute of Biophysics Siberian Branch of Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
Institute of Geology and Mineralogy Siberian Branch of Russian Academy of Sciences, Novosibirsk, 630090, Russian Federation

Доп.точки доступа:
Bolsunovsky, A.; Melgunov, M.

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13.

New data on accumulation of americium-241 in photoassimilating organs of aquatic plant Elodea canadensis / T. A. Zotina, A. Ya. Bolsunovskij, L. G. Bondareva // Doklady Akademii Nauk. - 2005. - Vol. 405, Is. 2. - С. 274-276 . - ISSN 0869-5652
Кл.слова (ненормированные):
Absorption -- Biomass -- Composition effects -- Microorganisms -- Plants (botany) -- Radioactivity -- Photoassimilation -- Radionuclide accumulation -- Americium
Аннотация: It is shown experimentally that 241Am activity accumulated by elodea is mainly contained in leaves (up to 80%) and about 20% - in the stem. Specific capacity of leaves in respect to americium is considerably dependent on the plant age that is due to formed on elodea leaf surface organo-mineral sediment consisting of mineral salts, epiphytic microorganisms and exometabolites. Am accumulation is larger in the older leaves (located lower on the stem) - nearly 70% of activity of americium accumulated by the whole plant biomass.

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Держатели документа:
Inst. Biofiziki SO RAN, Krasnoyarsk, Russian Federation : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Zotina, T.A.; Bolsunovskij, A.Ya.; Bondareva, L.G.

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14.

Detoxification of AM-241 solutions by humic substances: Bioluminescent monitoring / T. Rozhko [et al.] // Analytical and Bioanalytical Chemistry. - 2011. - Vol. 400, Is. 2. - P329-334, DOI 10.1007/s00216-010-4442-9 . - ISSN 1618-2642
Кл.слова (ненормированные):
Detoxification -- Humic substances -- Ionizing radiation -- Luminous bacteria -- Bacterial cells -- Bottom sediments -- Humic substances -- Luminescent intensity -- Luminous bacteria -- Natural transformations -- Organic substances -- Photobacterium phosphoreum -- Physiological activity -- Protecting agent -- Water solutions -- Anoxic sediments -- Bacteriology -- Bioluminescence -- Detoxification -- Ionizing radiation -- Luminance -- Radiation shielding -- Radioactivity -- Bacteria -- americium -- radioisotope -- article -- bioremediation -- chemistry -- environmental monitoring -- evaluation -- humic substance -- instrumentation -- luminescence -- metabolism -- methodology -- Photobacterium -- water pollutant -- Americium -- Biodegradation, Environmental -- Environmental Monitoring -- Humic Substances -- Luminescence -- Photobacterium -- Radioisotopes -- Water Pollutants, Chemical -- Bacteria (microorganisms) -- Photobacterium phosphoreum
Аннотация: The study addresses the effect of humic substances on marine luminous bacteria Photobacterium phosphoreum exposed to Am-241 (3,000 Bq L -1, water solution). Luminescent intensity of the bacteria was applied as a marker of their physiological activity. Humic substances have been found to reduce the effect of Am-241 on luminescence, decrease damage to cells, and change distribution of Am-241 between bacterial cells and intercellular media. It was shown that water-soluble humic substances, being products of natural transformation of organic substances in soil and bottom sediments, can serve as protecting agents for water microorganisms exposed to alpha radionuclides. В© 2010 Springer-Verlag.

Scopus
Держатели документа:
Siberian Federal University, Krasnoyarsk 660041, Russian Federation
Institute of Biophysics SB RAS, Krasnoyarsk 660036, Russian Federation
Irkutsk State University, Irkutsk 664003, Russian Federation : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Rozhko, T.; Bondareva, L.; Mogilnaya, O.; Vydryakova, G.; Bolsunovsky, A.; Stom, D.; Kudryasheva, N.

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15.

New data on transuranium elements in the ecosystem of the Yenisei river floodplain / A. Bolsunovsky, A. Ermakov, A. Sobolev // Radiochimica Acta. - 2007. - Vol. 95, Is. 9. - P547-552, DOI 10.1524/ract.2007.95.9.547 . - ISSN 0033-8230
Кл.слова (ненормированные):
243,244Cm -- Blackcurrant -- Sediment and floodplain soil of the Yenisei river -- Soil-plant transfer factor (TF) -- Transuranium elements
Аннотация: The aim of the study is to investigate levels of transuranium elements in the ecosystem of the Yenisei river floodplain in the vicinity of the Mining-and-Chemical Combine of Rosatom. For the first time, the transuranium isotopes 243,244Cm have been detected in sediment, floodplain soil, and a berry shrub (Ribes nigrum - the blackcurrant) in the flood-plain of the Yenisei river. The highest level of curium isotopes registered in the sediment of the Yenisei river is 21.4 Bq/kg (dry), which is more than twice higher than maximum curium levels reported for soils sampled not far from the Chernobyl Nuclear Plant. Blackcurrant plants growing on radioactively contaminated soils contain the same transuranium elements as the soil (plutonium isotopes, americium, and curium). The highest activity concentrations of all transuranic elements have been found in ashed roots of the blackcurrant plants: 239,240Pu - 9.3 Bq/kg, 241Am - 6.9 Bq/kg, and 243,244Cm - 1.8 Bq/kg. The highest soil-plant transfer factor (TF) for 243,244Cm is determined for roots - 0.073; the TF of 243,244Cm in berries is 0.027. The TF for 239,240Pu in berries is 0.006, which is several times lower than the TF for 243,244Cm. Analysis of our results and the literature data suggests that TFs for 243,244Cm are higher than those for 239,240Pu and 241Am. В© by Oldenbourg Wissenschaftsverlag.

Scopus
Держатели документа:
Institute of Biophysics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russian Federation
SIA RADON, Moscow, Russian Federation : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Bolsunovsky, A.; Ermakov, A.; Sobolev, A.

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16.

Accumulation and release of 241Am by a macrophyte of the Yenisei River (Elodea canadensis) / A. Bolsunovsky, T. Zotina, L. Bondareva // Journal of Environmental Radioactivity. - 2005. - Vol. 81, Is. 1. - P33-46, DOI 10.1016/j.jenvrad.2004.10.012 . - ISSN 0265-931X
Кл.слова (ненормированные):
241Am -- Accumulation -- Laboratory experiments -- Release -- Submerged plant Elodea canadensis -- Yenisei River -- Activation analysis -- Biomass -- Concentration (process) -- Effluents -- Plutonium -- Rivers -- Aquatic plants -- Elodea plant -- Macrophytes -- Radioactive contamination -- Transuranium elements -- americium 241 -- river water -- americium -- americium nitrate -- bioaccumulation -- biological uptake -- macrophyte -- pollutant source -- radioactive pollution -- river water -- submerged vegetation -- article -- biomass -- concentration (parameters) -- environmental factor -- fractionation -- laboratory -- macrophyte -- radioactivity -- river -- sampling -- adsorption -- chemistry -- Hydrocharitaceae -- methodology -- physiology -- plant -- radiation exposure -- radiation monitoring -- Russian Federation -- sediment -- soil pollutant -- time -- tissue distribution -- water pollutant -- Eastern Hemisphere -- Eurasia -- Russian Federation -- World -- Yenisei River -- Elodea canadensis -- Adsorption -- Americium -- Biomass -- Chemical Fractionation -- Geologic Sediments -- Hydrocharitaceae -- Plant Shoots -- Radiation Monitoring -- Rivers -- Russia -- Soil Pollutants, Radioactive -- Time Factors -- Tissue Distribution -- Water Pollutants, Radioactive
Аннотация: The source of radioactive contamination of the Yenisei River floodplain, including contamination with transuranic elements, is the Mining-and-Chemical Combine of the Russian Ministry of Atomic Energy, which has for many years been producing weapons-grade plutonium. Transuranic elements have been detected not only in the soil and sediment of the river but also in the biomass of aquatic plants. This work is an investigation of accumulation and release of 241Am by a submerged macrophyte of the Yenisei River (Elodea canadensis) in laboratory experiments. In 2000-2003, laboratory experiments were carried out with biomass of E. canadensis Mich. and filtered river water. The samples were collected from the Yenisei River upstream of the discharge of the Combine's radioactive effluent. The experiments showed that 241Am is accumulated by Elodea biomass: the activity concentration of 241Am can reach 3280 В± 240 Bq/g, with the concentration factor for 241Am 16 600 В± 2200 l/kg. Results of chemical fractionation have proved that in the course of 241Am accumulation by Elodea biomass, 241Am tightly bound to biomass increases from 11% to 27% of the total 241Am in the biomass. Release of 241Am from the decaying Elodea biomass has been evaluated experimentally. By the end of the experiment (lasting up to 127 days), the Elodea plants had lost up to 65% of their initial 241Am activity and the rate of 241Am release into the water environment reached 23 Bq/day. В© 2004 Elsevier Ltd. All rights reserved.

Scopus
Держатели документа:
Institute of Biophysics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk 660036, Russian Federation : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Bolsunovsky, A.; Zotina, T.; Bondareva, L.

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17.

Assessment of the rate of accumulation of the transuranium element americium-241 by the aquatic plant Elodea canadensis / A. Ya. Bolsunovskii [et al.] // Doklady Biological Sciences. - 2004. - Vol. 399, Is. 1-6. - P467-469, DOI 10.1007/s10630-005-0014-0 . - ISSN 0012-4966
Кл.слова (ненормированные):
americium -- radioisotope -- water -- article -- biomass -- drug effect -- environmental monitoring -- Hydrocharitaceae -- methodology -- pH -- plant -- plant root -- radiation exposure -- radiochemistry -- time -- toxicity testing -- water pollutant -- Americium -- Biomass -- Environmental Monitoring -- Hydrocharitaceae -- Hydrogen-Ion Concentration -- Plant Roots -- Plant Shoots -- Plants -- Radiochemistry -- Radioisotopes -- Time Factors -- Toxicity Tests -- Water -- Water Pollutants, Radioactive -- Elodea canadensis

Scopus
Держатели документа:
Institute of Biophysics, Siberian Division, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, 660036, Russian Federation : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Bolsunovskii, A.Ya.; Zotina, T.A.; Bondareva, L.G.; Degermendzhi, A.G.

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18.

Transfer of americium-241 from food and water to organs and tissues of the crucian carp * / T. Zotina [et al.] // Radioprotection. - 2011. - Vol. 46, Is. 6 SUPPL. - S69-S73, DOI 10.1051/radiopro/20116648s . - ISSN 0033-8451
Аннотация: The transfer of transuranium element americium-241 (241Am) from food and water to organs and tissues of freshwater fish (Carassius auratus gibelio, crucian carp) has been investigated in laboratory experiments. The fishes were fed with homogenized biomass of submerged macrophytes labeled with 241Am, through catheter. For the first two days after force-feeding, fishes excreted up to 80% of ingested americium, for four days - 98%. 241Am was registered in internal organs and tissues that had no direct contact with americium (liver, bones, muscles) as early as two days after the feeding and after eight days, when the digestive tract was depurated. Among internal organs, the highest activity concentration was recorded in the liver (up to 427 Bq/kg). Activity concentration in bones (19-31 Bq/kg) was several times higher than in muscles, indicating the affinity of americium to bone tissue. Assimilation of 241Am in organs and tissues of crucian carp from water occurred mainly via the digestive tract too. В© 2011 EDP Sciences.

Scopus
Держатели документа:
Institute of Biophysics, SB RAS, Akademgorodok, 660036 Krasnoyarsk, Russian Federation : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Zotina, T.; Trofimova, E.; Dementyev, D.; Bolsunovsky, A.

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19.

Chemical fractionation of radionuclides and stable elements in aquatic plants of the yenisei river / A. Bolsunovsky // Environmental Science and Technology. - 2011. - Vol. 45, Is. 17. - P7143-7150, DOI 10.1021/es2008853 . - ISSN 0013-936X
Кл.слова (ненормированные):
Aquatic plants -- Artificial radionuclides -- Cell structure -- Chemical Fractionation -- Distribution patterns -- Nuclear plant -- Plant biomass -- Sequential extraction scheme -- Stable elements -- Submerged plants -- Transuranic elements -- Americium -- Biomass -- Neptunium -- River pollution -- Rivers -- Radioisotopes -- americium -- element -- neptunium -- radioisotope -- bioaccumulation -- chemical binding -- gamma ray spectrometry -- isotopic fractionation -- monocotyledon -- phytomass -- radionuclide -- river pollution -- submerged vegetation -- aquatic species -- article -- Batrachium kauffmanii -- biomass -- cell structure -- controlled study -- extraction -- Fontinalis antipyretica -- fractionation -- gamma spectrometry -- higher plant -- nonhuman -- plant growth -- Potamogeton lucens -- Potamogetonaceae -- river -- Russian Federation -- Aquatic Organisms -- Biomass -- Chemical Fractionation -- China -- Industrial Waste -- Plants -- Radiation Monitoring -- Radioisotopes -- Rivers -- Water Pollutants, Radioactive -- Russian Federation -- Yenisei River -- Batrachium -- Fontinalis antipyretica -- Potamogeton lucens
Аннотация: The Yenisei River is contaminated with artificial radionuclides released by one of the Russian nuclear plants. The aquatic plants growing in the radioactively contaminated parts of the river contain artificial radionuclides. The aim of the study was to investigate accumulation of artificial radionuclides and stable elements by submerged plants of the Yenisei River and estimate the strength of their binding to plant biomass by using a new sequential extraction scheme. The aquatic plants sampled were: Potamogeton lucens, Fontinalis antipyretica, and Batrachium kauffmanii. Gamma-spectrometric analysis of the samples of aquatic plants has revealed more than 20 radionuclides. We also investigated the chemical fractionation of radionuclides and stable elements in the biomass and rated radionuclides and stable elements based on their distribution in biomass. The greatest number of radionuclides strongly bound to biomass cell structures was found for Potamogeton lucens and the smallest for Batrachium kauffmanii. For Fontinalis antipyretica, the number of distribution patterns that were similar for both radioactive isotopes and their stable counterparts was greater than for the other studied species. The transuranic elements 239Np and 241Am were found in the intracellular fraction of the biomass, and this suggested their active accumulation by the plants. В© 2011 American Chemical Society.

Scopus
Держатели документа:
Institute of Biophysics SB, Russian Academy of Sciences, Krasnoyarsk, Russian Federation : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Bolsunovsky, A.

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20.

Biochemical fractionation and cellular distribution of americium and plutonium in the biomass of freshwater macrophytes / T. A. Zotina, G. S. Kalacheva, A. Y. Bolsunovsky // Journal of Radioanalytical and Nuclear Chemistry. - 2011. - Vol. 290, Is. 2. - P447-451, DOI 10.1007/s10967-011-1228-2 . - ISSN 0236-5731
Кл.слова (ненормированные):
238, 242Pu -- 241Am -- Carbohydrates -- Cellulose -- Fractionation -- Protein -- Submerged macrophyte -- americium 241 -- plutonium -- plutonium 238 -- plutonium 242 -- polysaccharide -- unclassified drug -- article -- bioaccumulation -- biomass -- cellular distribution -- Ceratophyllum demersum -- controlled study -- cytosol -- Elodea canadensis -- Fontinalis antipyretica -- fractionation -- freshwater species -- macrophyte -- moss -- Myriophyllum spicatum -- nonhuman -- plant cell -- radiation absorption -- radioactivity -- shoot
Аннотация: Accumulation of americium ( 241Am) and plutonium ( 238,242Pu) and their distribution in cell compartments and biochemical components of the biomass of freshwater aquatic plants Elodea canadensis, Ceratophyllum demersum and Myrioplyllum spicatum and aquatic moss Fontinalis antipyretica have been investigated in laboratory experiments. Americium and plutonium taken up from water by Elodea canadensis apical shoots were mainly absorbed by structural components of plant cells (90% for 241Am; 89% for 238Pu and 82-87% for 242Pu). About 10-18% of isotope activity was recorded in the cytosol fraction. The major concentration (76-92%) of americium was bound to cell wall cellulose-like polysaccharides of Elodea canadensis, Myriophyllum spicatum, Ceratophyllum demersum and Fontinalis antipyretica, 8-24% of americium activity was registered in the fraction of proteins and carbohydrates, and just a minor concentration (<1%) in the lipid fraction. The distribution of plutonium in the biomass fractions of Elodea was similar to that of americium. Hence, americium and plutonium had the highest affinity to cellulose-like polysaccharides of cell walls of freshwater submerged macrophytes. В© 2011 Akademiai Kiado, Budapest, Hungary.

Scopus
Держатели документа:
Institute of Biophysics, Siberian Branch of Russian Academy of Sciences, Akademgorodok, Krasnoyarsk 660036, Russian Federation : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Zotina, T.A.; Kalacheva, G.S.; Bolsunovsky, A.Y.

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