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First data on the uranium content in water of the Yenisei River basin in the area affected by the operation of Rosatom plants / A. Y. Bolsunovskii [et al.] // Doklady Earth Sciences. - 2011. - Vol. 439, Is. 1. - P1010-1015, DOI 10.1134/S1028334X11070208 . - ISSN 1028-334X
Кл.слова (ненормированные):
Inorganic chemistry -- Isotope ratio -- Isotopic composition -- Long term monitoring -- River basins -- Russian Academy of Sciences -- Uranium contents -- Uranium isotopes -- Water samples -- Effluents -- Inorganic compounds -- Isotopes -- Mass spectrometry -- Nuclear fuels -- Rivers -- Uranium -- Watersheds -- Water content -- effluent -- environmental monitoring -- isotopic composition -- isotopic ratio -- mass spectrometry -- tributary -- uranium isotope -- Russian Federation -- Yenisei River
Аннотация: This study is devoted to investigating the content of uranium isotopes in water of the Yenisei River and its tributaries within the territories affected by the operation of Rosatom plants (mining chemical combine, and electrochemical plant). Long-term monitoring of the 238U content by mass spectrometry carried out in two institutes of the Siberian Branch of the Russian Academy of Sciences first revealed the multiple excess of 238U over the background content in different areas of the Yenisei River basin, such as the region of the Yenisei River near the effluents of the mining and chemical combine (MCC), and the territories of the Bol'shaya Tel' and Kan rivers. In these regions, the 238U content in water reaches 2.1-4.0 ?g/l, which exceeds its content upstream from the MCC (0.3-0.6 ?g/l) by almost an order of magnitude. The studies of the isotopic composition of uranium in water samples, which were carried out at the Institute of Inorganic Chemistry, Siberian Branch, Russian Academy of Sciences, showed the presence of a technogenic isotope of uranium 236U in the samples from the Bolshaya Tel' River and revealed the deviation of the isotope ratio 238U/ 235U (167 В± 3 and 177 В± 3) from the equilibrium natural ratio ( 238U/ 235U = 138). These facts attest to the technogenic origin of part of the uranium in water of the Bol'shaya Tel' River connected with the activity of MCC. The excess uranium content in the Kan River requires additional studies to ascertain the fraction of uranium of technogenic origin connected with the activity of the electrochemical plant (ECP) (Fig. 1, Table 4). В© 2011 Pleiades Publishing, Ltd.

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Держатели документа:
Institute of Biophysics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russian Federation
Institute of Chemistry and Chemical Engineering, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russian Federation
Nikolaev Institute of Inorganic Chemistry, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russian Federation : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Bolsunovskii, A.Y.; Zhizhaev, A.M.; Saprykin, A.I.; Degermendzhi, A.G.; Rubailo, A.I.

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Model assessment of the migration capability of transuranium radionuclides (241Am and Pu isotopes) and 152Eu in the system bottom sediments-Yenisei river water by chemical fractionation technique / L. G. Bondareva [et al.] // Radiochemistry. - 2005. - Vol. 47, Is. 4. - P415-421, DOI 10.1007/s11137-005-0112-8 . - ISSN 1066-3622
Аннотация: Sorption of radiotracers 241Am and 242Pu and weighable amounts of uranium and stable Eu on bottom sediments in the simulated system bottom sediments-Yenisei river water was studied. At a contact time of 40 min these metals are completely sorbed on the bottom sediments, presumably via association with organomineral complexes and hydrated gels. Along with sorption, these metals can form soluble complexes and stable colloids (pseudocolloids). The distribution factors of 241Am and 242Pu, and stable Eu in the simulated system between bottom sediments and liquid phases were calculated from the results of sorption experiments. The introduced 241Am and 152Eu initially present in radioactively contaminated bottom sediments of the Yenisei river show similar pattern of distribution over differently mobile fractions. The distribution of weighable amounts of stable Eu significantly differs from that of initially present 152Eu and tracer 241Am due to decelerated sorption of stable Eu and its considerably higher concentration. A significant part of 242Pu, 241Am, and 152Eu is associated with mobile fractions of bottom sediments, which, under certain environmental conditions, can pass into river water as migrating species. В©2005 Pleiades Publishing, Inc.

Scopus
Держатели документа:
Institute of Biophysics, Siberian Division, Russian Academy of Sciences, Krasnoyarsk, Russian Federation
Joint Institute of Geology, Geophysics, and Mineralogy, Siberian Division, Russian Academy of Sciences, Novosibirsk, Russian Federation
Institute of Chemistry and Chemical Technology, Siberian Division, Russian Academy of Sciences, Krasnoyarsk, Russian Federation : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Bondareva, L.G.; Bolsunovskii, A.Ya.; Sukhorukov, F.V.; Kazbanov, V.I.; Makarova, I.V.; Legler, E.V.

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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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Radionuclide speciation in sediments of the Yenisei River / A. Bolsunovsky // Radioprotection. - 2011. - Vol. 46, Is. 6 SUPPL. - S195-S198, DOI 10.1051/radiopro/20116457s . - ISSN 0033-8451
Аннотация: The examination of sediment samples collected from the Yenisei River revealed the presence of artificial radionuclides characteristic of radioactive discharges from the MCC facility: isotopes of europium (152Eu, 154Eu, and 155Eu), cesium (137Cs and 134Cs), 60Co,90Sr, and transuranium elements. Radionuclide concentrations in sediment layers remained high as far as 240 km downstream of the MCC. The vertical distribution of radionuclides in sediment cores was very complex, and down-core variations were due to different amounts of radionuclides released by the MCC and due to variations in the hydrologic conditions in the river. Sequential extraction performed on samples of the upper layers of the sediment core showed different degrees of potential environmental availability of artificial radionuclides: the amounts of extracted 90Sr, 152Eu and 241Am were the largest (60-80% of initial activity), then followed 60Co (30%), 238,239,240Pu (15-30%), and, last, 137Cs (5-15%). The distribution of 238U among chemical fractions of sediments was similar to that of 60Co and 238,239,240Pu: 30-40% of 238U initial activity was extracted. In a few samples, 241Am was present in the unextractable form, which may be accounted for by the presence of microparticles of the reactor fuel. В© 2011 EDP Sciences.

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

Доп.точки доступа:
Bolsunovsky, A.

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Evidence of the radioactive fallout in the center of asia (russia) following the fukushima nuclear accident / A. Bolsunovsky, D. Dementyev // Journal of Environmental Radioactivity. - 2011. - Vol. 102, Is. 11. - P1062-1064, DOI 10.1016/j.jenvrad.2011.06.007 . - ISSN 0265-931X
Кл.слова (ненормированные):
Environmental samples -- Fission product radionuclides -- Fukushima nuclear accident -- Radioactive fallout -- Russia -- Chernobyl accident -- Environmental sample -- Fallout radionuclides -- Global effects -- High velocity -- Nuclear accidents -- Radioactive contamination -- Russia -- Water samples -- Cesium -- Fallout -- Fission products -- Radioactivity -- Radioisotopes -- Nuclear reactor accidents -- cesium 137 -- iodine 131 -- rain -- atmospheric pollution -- cesium isotope -- fallout -- nuclear accident -- radioactive pollution -- radionuclide -- article -- environmental exposure -- gamma spectrometry -- nuclear accident -- radioactive contamination -- radioactive waste -- water analysis -- water contamination -- Cesium Radioisotopes -- Cities -- Humans -- Iodine Radioisotopes -- Japan -- Radiation Dosage -- Radiation Monitoring -- Radioactive Fallout -- Radioactive Hazard Release -- Radioactive Pollutants -- Risk Assessment -- Russia -- Time Factors -- Fukushima -- Honshu -- Japan -- Krasnoyarsk [Russian Federation] -- Russian Federation -- Tohoku
Аннотация: It was recently reported that radioactive fallout due to the Fukushima Nuclear Accident was detected in environmental samples collected in the USA and Greece, which are very far away from Japan. In April-May 2011, fallout radionuclides ( 134Cs, 137Cs, 131I) released in the Fukushima Nuclear Accident were detected in environmental samples at the city of Krasnoyarsk (Russia), situated in the center of Asia. Similar maximum levels of 131I and 137Cs/ 134Cs and 131I/ 137Cs ratios in water samples collected in Russia and Greece suggest the high-velocity movement of the radioactive contamination from the Fukushima Nuclear Accident and the global effects of this accident, similar to those caused by the Chernobyl accident. В© 2011 Elsevier Ltd.

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

Доп.точки доступа:
Bolsunovsky, A.; Dementyev, D.

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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.

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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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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.

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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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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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Artificial radionuclides in sediment of the Yenisei River / A. Bolsunovsky // Chemistry and Ecology. - 2010. - Vol. 26, Is. 6. - P401-409, DOI 10.1080/02757540.2010.504668 . - ISSN 0275-7540
Кл.слова (ненормированные):
Artificial radionuclides -- River sediments -- Sequential extraction -- Yenisei river -- cesium isotope -- cobalt isotope -- concentration (composition) -- europium -- extraction method -- industrial waste -- radionuclide -- river pollution -- sediment chemistry -- Krasnoyarsk [Russian Federation] -- Russian Federation -- Yenisei River -- Zheleznogorsk
Аннотация: Releases from the nuclear facility Mining-and-Chemical Combine (MCC) located at Zheleznogorsk have contributed to the radionuclide contamination of the Yenisei River since operations commenced in 1958. The aim of this study was to assess the activity concentrations of artificial radionuclides and the strength of their binding in Yenisei River sediments. Investigation of Yenisei River sediment samples revealed the presence of artificial radionuclides typical of the MCC radioactive discharge: namely, isotopes of europium, caesium, 60Co and transuranium elements. The concentrations of artificial radionuclides in the sediment layers remain relatively high as far as 200 km downstream of the MCC. In sediment cores collected upstream of the MCC, ? -spectrometric measurements registered only one artificial radionuclide, 137Cs, with a maximal activity of 8 BqВ·kg -1. Sequential extraction performed on samples of the upper layers of the sediment core showed different degrees of potential environmental availability for artificial radionuclides: the highest was recorded for 241Am and 152Eu (up to 85% of initial activity), followed by 60Co (up to 32%), and finally, 137Cs (up to 15%). In a few samples, 241Am was present in the unextractable form, which may be accounted for by the presence of reactor fuel microparticles. В© 2010 Taylor & Francis.

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

Доп.точки доступа:
Bolsunovsky, A.

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10.

Microdistribution of 241Am in structures of submerged macrophyte Elodea canadensis growing in the Yenisei River / L. Bondareva [et al.] // Journal of Environmental Radioactivity. - 2010. - Vol. 101, Is. 1. - P16-21, DOI 10.1016/j.jenvrad.2009.08.003 . - ISSN 0265-931X
Кл.слова (ненормированные):
Alpha-track analysis -- Americium -- Elodea canadensis -- Liquid-scintillation spectrometry -- Microdistribution -- Alpha-track analysis -- Elodea canadensis -- Microdistribution -- Scintillation spectrometry -- Track analysis -- Liquids -- Luminescence -- Radioisotopes -- Scintillation -- Spectrometry -- Spectroscopy -- Americium -- americium 241 -- americium -- americium -- bioaccumulation -- experimental study -- leaf -- macrophyte -- mass spectrometry -- morphology -- radionuclide -- spatial distribution -- stem -- submerged vegetation -- tracking -- aquatic flora -- article -- bioaccumulation -- concentration (parameters) -- elodea canadensis -- environmental radioactivity -- isotope analysis -- isotope tracing -- leaf lamina -- leaf surface -- macrophyte -- nonhuman -- plant cell -- plant morphology -- plant stem -- radioisotope distribution -- river -- chemistry -- Hydrocharitaceae -- metabolism -- plant -- plant leaf -- radiation monitoring -- river -- water pollutant -- Eurasia -- Russian Federation -- Yenisei River -- Elodea canadensis -- Americium -- Hydrocharitaceae -- Plant Leaves -- Plant Shoots -- Plant Stems -- Radiation Monitoring -- Rivers -- Water Pollutants, Radioactive
Аннотация: A submerged macrophyte of the Yenisei River, Elodea canadensis, was used to study the microdistribution of the artificial radionuclide 241Am among different components of the plant. The total amount of 241Am added to the experimental system was 1850 В± 31 Bq/L. The total amount of 241Am accumulated by the plants was 182 Bq per sample, or 758,333 В± 385 Bq/kg dry mass. It has been found that the major portion of 241Am accumulated by E. canadensis, up to 85%, was bound to solid components of the cells. It is observed that the microdistribution of 241Am within different components of the submerged plant E. canadensis was not uniform. 241Am distribution vary depending on the age of the leaf blades, the state of the cells and morphological features of the plant stem. В© 2009 Elsevier Ltd. All rights reserved.

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Держатели документа:
Institute of Biophysics, Siberian Branch, Russian Academy of Sciences, 50 Akademgorodok, Krasnoyarsk, 660036, Russian Federation
Chemistry Department, Lomonosov Moscow State University, Leninskie Gory, Moscow 119991, Russian Federation : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Bondareva, L.; Vlasova, I.; Mogilnaya, O.; Bolsunovsky, A.; Kalmykov, S.

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11.

Carbon cycle modeling and principle of the worst scenario / S. I. Bartsev, A. G. Degermendzhi, P. V. Belolipetsky // Developments in Environmental Modelling. - 2012. - Vol. 25. - P447-458, DOI 10.1016/B978-0-444-59396-2.00026-2

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

Доп.точки доступа:
Bartsev, S.I.; Degermendzhi, A.G.; Belolipetsky, P.V.

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12.

Vertical stratification of physical, chemical and biological components in two saline lakes Shira and Shunet (South Siberia, Russia) / A. G. Degermendzhy [et al.] // Aquatic Ecology. - 2010. - Vol. 44, Is. 3. - P619-632, DOI 10.1007/s10452-010-9336-6 . - ISSN 1386-2588
Кл.слова (ненормированные):
Ciliates -- Cryptomonas -- Fishless lakes -- Gammarus -- Mathematical modelling -- Meromictic lakes -- Phytoplankton -- Stratification -- Sulphur bacteria -- amphipod -- bacterium -- biomass -- ciliate -- ecosystem modeling -- flagellate -- meromictic lake -- microbial community -- numerical model -- physicochemical property -- phytoplankton -- population density -- saline lake -- salinity -- stratification -- thermocline -- trophic interaction -- vertical profile -- zooplankton -- Khakassia -- Lake Shira -- Lake Shunet -- Russian Federation -- Siberia -- Amphipoda -- Bacteria (microorganisms) -- Ciliophora -- Copepoda -- Cryptomonas -- Cryptomonas sp. -- Gammaridae -- Gammarus -- Gammarus lacustris -- Phytomastigophorea -- Protista -- Rotifera
Аннотация: A feature of meromictic lakes is that several physicochemical and biological gradients affect the vertical distribution of different organisms. The vertical stratification of physical, chemical and biological components in saline, fishless meromictic lakes Shira and Shunet (Siberia, Russia) is quite different mainly because both mean depth and maximum depth of lakes differ as well as their salinity levels differ. The chemocline of the Lake Shira, as in many meromictic lakes, is inhabited by bacterial community consisting of purple sulphur and heterotrophic bacteria. As the depth of the chemocline is variable, the bacterial community does not attain high densities. The mixolimnion in Lake Shira, which is thermally stratified in summer, also creates different habitat for various species. The distribution of phytoplankton is non-uniform with its biomass peak in the metalimnion. The distribution of zooplankton is also heterogeneous with rotifers and juvenile copepods inhabiting the warmer epilimnion and older copepods found in the cold but oxic hypolimnion. The amphipod Gammarus lacustris which can be assigned to the higher trophic link in the fishless lake's ecosystem, such as Lake Shira, is also distributed non-uniformly, with its peak density generally observed in the thermocline region. The chemocline in Lake Shunet is located at the depth of 5 m, and unlike in Lake Shira, due to a sharp salinity gradient between the mixolimnion and monimolimnion, this depth is very stable. The mixolimnion in Lake Shunet is relatively shallow and the chemocline is inhabited by (1) an extremely dense bacterial community; (2) a population of Cryptomonas sp.; and (3) ciliate community comprising several species. As the mixolimnion of Lake Shunet is not thermally stratified for long period, the phytoplankton and zooplankton populations are not vertically stratified. The gammarids, however, tend to concentrate in a narrow layer located 1-2 m above the chemocline. We believe that in addition to vertical inhomogeneities of both physicochemical parameters, biological and physical factors also play a role in maintaining these inhomogeneities. We conclude that the stratified distributions of the major food web components will have several implications for ecosystem structure and dynamics. Trophic interactions as well as mass and energy flows can be significantly impacted by such heterogeneous distributions. Species spatially separated even by relatively short distances, say a few centimetres will not directly compete. Importantly, we demonstrate that not only bacteria, phytoflagellates and ciliate tend to concentrate in thin layers but also larger-sized species such Gammarus (amphipods) can also under certain environmental conditions have stratified distribution with maxima in relatively thin layer. As the vertical structure of the lake ecosystem is rather complex in such stratified lakes as ours, the strategy of research, including sampling techniques, should consider potentially variable and non-homogeneous distributions. В© 2010 The Author(s).

Scopus
Держатели документа:
Institute of Biophysics SB RAS, 660036 Krasnoyarsk, Akademgorodok, Russian Federation
Siberian Federal University, Svobodnyi 79, 660041 Krasnoyarsk, Russian Federation
Netherlands Environmental Assessment Agency (PBL), P.O. Box 303, 3720 AH Bilthoven, Netherlands
Department of Aquatic Ecology, Netherlands Institute of Ecology (NIOO-KNAW), 3631 AC Nieuwersluis, Netherlands : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Degermendzhy, A.G.; Zadereev, E.S.; Rogozin, D.Y.; Prokopkin, I.G.; Barkhatov, Y.V.; Tolomeev, A.P.; Khromechek, E.B.; Janse, J.H.; Mooij, W.M.; Gulati, R.D.

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13.

Anoxygenic phototrophic bacteria in meromictic lakes of southern Siberia during the ice period: Spatial distributions and ecological conditions / D. Yu. Rogozin [et al.] // Doklady Biological Sciences. - 2009. - Vol. 424, Is. 1. - P63-67, DOI 10.1134/S0012496609010190 . - ISSN 0012-4966
Кл.слова (ненормированные):
fresh water -- anaerobic growth -- article -- environmental aspects and related phenomena -- history -- ice cover -- microbiology -- phototrophy -- Russian Federation -- season -- Anaerobiosis -- Ecological and Environmental Phenomena -- Fresh Water -- History, Ancient -- Ice Cover -- Phototrophic Processes -- Seasons -- Siberia -- Photobacteria

Scopus
Держатели документа:
Institute of Biophysics, Siberian Branch, Russian Academy of Sciences, Akademgorodok 50, Krasnoyarsk 660036, Russian Federation
Siberian Federal University, Svobodnyi pr. 79, Krasnoyarsk 66041, Russian Federation : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Rogozin, D.Yu.; Zykov, V.V.; Chernetskii, M.Yu.; Degermendzhy, A.G.

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14.

Interaction coefficients in the Lake Shira algal-bacterial community / V. V. Adamovich, T. A. Zotina, A. G. Degermendzhy // Aquatic Ecology. - 2002. - Vol. 36, Is. 2. - P261-270, DOI 10.1023/A:1015638420766 . - ISSN 1386-2588
Кл.слова (ненормированные):
Bacterioplankton -- Feedback coefficient -- Influence coefficient -- Phytoplankton -- Specific growth rate -- bacterioplankton -- interspecific interaction -- microbial community -- phytoplankton -- quantitative analysis -- saline lake -- Russian Federation -- algae -- Bacteria (microorganisms)
Аннотация: A new method is proposed to evaluate the interaction coefficients in microbial communities interacting due to physical-chemical environmental factors. This method differs from the classical one suggested by E.P.Odum. Redefinition of the interaction coefficients allows the evaluation of the experimental (actual) and theoretical values of the coefficients for the hypothetical interaction layout. The interaction layout is considered to be a set of factors, the values of their transformation ratios and the form of dependence of a population's specific growth rate on these factors. A comparison of theoretical and experimental values of interaction coefficients enables us to assess the adequacy of the hypothetical interaction scheme in the microbial communities. The aim of the work is to test the suggested method on a natural algal-bacterial community of Shira Lake (Khakasia, Russia), which has been the object of detailed and concerted limnological studies and for which detailed data are available. Feedback coefficients of phyto- and bacterioplankton and the coefficients of influence of phytoplankton on bacterioplankton have been defined. Dominance of negative experimental IC values has been experimentally shown, which is indicative of the negative feedback in bacterio- and phytoplankton links of Shira Lake and of negative interpopulation (phytoplankton on bacterioplankton) interactions. The considerable differences observed between the experimental and theoretical coefficients indicates inadequacy of the assumed interaction layout of the community under study. Further investigations are needed to provide a precise sketch of the interactions.

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

Доп.точки доступа:
Adamovich, V.V.; Zotina, T.A.; Degermendzhy, A.G.

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15.

Accumulation of artificial radionuclides by the Yenisei river aquatic plants in the area affected by the activity of the Mining-and-Chemical Combine / A. Ya. Bolsunovskij [и др.] // Radiatsionnaya Biologiya. Radioekologiya. - 2002. - Vol. 42, Is. 2. - С. 194-199 . - ISSN 0869-8031
Кл.слова (ненормированные):
Contamination -- Ecosystems -- Environmental impact -- Gamma ray spectrometers -- Radioisotopes -- River pollution -- Radioecological concentration -- Radioisotope accumulation -- The Yenisei river -- Ecology -- plutonium -- radioisotope -- strontium -- article -- chemical industry -- chemistry -- comparative study -- gamma spectrometry -- industrial waste -- mining -- nuclear reactor -- plant -- radiochemistry -- Russian Federation -- water pollutant -- Chemical Industry -- Industrial Waste -- Mining -- Nuclear Reactors -- Plants -- Plutonium -- Radiochemistry -- Radioisotopes -- Siberia -- Spectrometry, Gamma -- Strontium Radioisotopes -- Water Pollutants, Radioactive
Аннотация: The aim of the paper is to investigate accumulation of artificial radionuclides by the Yenisei river aquatic plants collected in the area affected by the activity of the Mining-and-Chemical Combine (Zheleznogorsk) from 1997 to 2000. The samples of aquatic plants were of four species: Potamogeton lucens, Fontinalis antipyretica, Elodea canadensis, and Ceratophyllum demersum. The gamma-spectrometric analysis of the samples of aquatic plants for artificial radionuclides revealed a wide spectrum of radionuclides. Radionuclides of activation origin were found in the aquatic plants taken both near the Combine and 200 km down of it. The radiochemical analysis of aquatic plants revealed strontium and plutonium isotopes. Among the aquatic plants, the highest concentration factors for the principal radionuclides were recorded in Fontinalis antipyretica (water moss).

Scopus
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.; Ermakov, A.I.; Burger, M.; Degermendzhy, A.G.; Sobolev, A.I.

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16.

A hybrid PHB-hydroxyapatite composite for biomedical application: Production, in vitro and in vivo investigation / E. I. Shishatskaya, I. A. Khlusov, T. G. Volova // Journal of Biomaterials Science, Polymer Edition. - 2006. - Vol. 17, Is. 5. - P481-498, DOI 10.1163/156856206776986242 . - ISSN 0920-5063
Кл.слова (ненормированные):
Biocompatibility -- Hydroxyapatite (HA) -- PHB-hydroxyapatite composite -- Polyhydroxyalkanoate (PHA) -- Polyhydroxybutyrate (P(3HB)) -- Properties -- Biocompatibility -- Differential thermal analysis -- Electron microscopy -- Free energy -- Interfacial energy -- Physical properties -- Surface properties -- X ray analysis -- Biomedical application -- Physicochemical properties -- Polyhydroxyalkanoate (PHA) -- Polyhydroxybutyrate (PHB) -- Hydroxyapatite -- hydroxyapatite -- poly(3 hydroxybutyric acid) -- polymer -- biomaterial -- hydroxybutyric acid -- adhesion -- animal cell -- animal tissue -- article -- biomedicine -- bone marrow cell -- cell differentiation -- cell growth -- chemical structure -- composite material -- controlled study -- crystallization -- decomposition -- electron microscopy -- in vitro study -- in vivo study -- melting point -- mouse -- nonhuman -- ossification -- osteoblast -- physical chemistry -- priority journal -- rat -- strength -- structure analysis -- surface property -- synthesis -- temperature measurement -- thermal analysis -- tissue engineering -- wettability -- animal -- biomechanics -- bioremediation -- bone prosthesis -- cattle -- cell culture -- chemistry -- cytology -- differential scanning calorimetry -- drug effect -- human -- materials testing -- prostheses and orthoses -- scanning electron microscopy -- standard -- Wistar rat -- Murinae -- Animals -- Biocompatible Materials -- Biodegradation, Environmental -- Biomechanics -- Bone Substitutes -- Cattle -- Cells, Cultured -- Differential Thermal Analysis -- Durapatite -- Humans -- Hydroxybutyrates -- Materials Testing -- Microscopy, Electron, Scanning -- Osteoblasts -- Prostheses and Implants -- Rats -- Rats, Wistar -- Surface Properties
Аннотация: Samples of a hybrid composite of polyhydroxybutyrate (PHB), a biodegradable polyester, and hydroxyapatite (HA), with different PHB/HA ratios, have been prepared using mechanical-physical method. Electron microscopy, X-ray structure analysis and differential thermal analysis have been used to investigate the structure and physicochemical properties of the composite, depending on the PHB/HA ratio. The properties of the surface of the HA-loaded composite are significantly different from those of the pure polymer. As the HA percentage in the composite increases, free interface energy, the cohesive force, i.e., the strength of the adhesive bond between the composite surface and the water phase, and surface wettability increase. The HA percentage of the composite does not influence its melting temperature, but affects the temperature for the onset of decomposition: as the HA content increases from 0 to 10% (w/w), Td decreases from 260В°C to 225В°C. The degree of crystallinity of PHB/HA increases from 77% to 89% with an increase in the HA fraction from 10% to 50%. Functional properties of the composites have been investigated in vitro and in vivo. The best parameters of growth and differentiation of murine marrow osteoblasts are registered on PHB/HA samples containing 10% and 20% HA. In ectopic bone formation assay it has been proven that the hybrid PHB/HA composites can function as scaffolds and that bone tissue develops on their surface and in pores. В© VSP 2006.

Scopus
Держатели документа:
Institute of Biophysics, Siberian Branch, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk 60036, Russian Federation
Tomsk State University, Tomsk 634021, Russian Federation : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Shishatskaya, E.I.; Khlusov, I.A.; Volova, T.G.

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17.

Degradation of P(3HB) and P(3HB-co-3HV) in biological media / E. I. Shishatskaya [et al.] // Journal of Biomaterials Science, Polymer Edition. - 2005. - Vol. 16, Is. 5. - P643-657, DOI 10.1163/1568562053783678 . - ISSN 0920-5063
Кл.слова (ненормированные):
Degradation rate -- Fiber properties -- Morphology -- Poly(hydroxybutyrate-co-hydroxyvalerate) (P(3HB-co-3HV)) -- Polyhydroxyalkanoates(PHAs) -- Polyhydroxybutyrate (P(3HB)) -- Copolymers -- Degradation -- Differential scanning calorimetry -- Enzymes -- Morphology -- Scanning electron microscopy -- Tensile strength -- Tissue -- Transmission electron microscopy -- Degradation rate -- Fiber properties -- Polyhydroxyalkanoates (PHAs) -- Polyhydroxybutyrate (P(3HB)) -- Biopolymers -- buffer -- copolymer -- poly(3 hydroxybutyric acid) -- polyhydroxybutyrate hydroxyvalerate copolymer -- unclassified drug -- animal experiment -- animal model -- animal tissue -- article -- biodegradation -- controlled study -- crystal structure -- fiber -- giant cell -- in vitro study -- in vivo study -- macrophage -- morphology -- nonhuman -- pH -- priority journal -- rat -- structure analysis -- tensile strength -- tissue water -- weight reduction -- Animals -- Biodegradation, Environmental -- Buffers -- Humans -- Hydrogen-Ion Concentration -- Hydroxybutyrates -- Macrophages -- Microscopy, Electron, Scanning -- Microscopy, Electron, Transmission -- Muscle, Skeletal -- Polyesters -- Rats -- Rats, Wistar
Аннотация: The biodegradability of oriented fibers made of polyhydroxybutyrate (P(3HB)) and its co-polymer with ?-hydroxyvalerate (P(3HB-co-3HV)) was investigated in buffer solutions and in biological media in vitro and in vivo. The fibers of both polymer types demonstrated resistance to hydrolytic degradation in buffer solutions at 38В°C and pH from 4.5 to 7.0 (for up to 180 days). It has been found that the biodegradation of the fibers in vitro in blood and serum and in vivo is accompanied by weight losses and minor changes in the microstructure with no significant losses in the tensile strength over a long time (up to 180 days). The biodegradation rate of the less crystalline co-polymer P(3HB-co-3HV) fibers was 1.4-2.0-times higher than that of the homopolymer P(3HB). It has also been shown that the degradation of the fibers in vivo is influenced both by tissue fluid enzymes and cells (macrophages and foreign-body giant cells). The fibers were eroded on the surface only with no gross defects and no dramatic effects on their mechanical performance. В© VSP 2005.

Scopus
Держатели документа:
Institute of Biophysics of Siberian Branch of Russian Academy of Sciences, Akademgorodok, Krasnoyarsk 600326, Russian Federation
Department of Cardiac Surgery, University of Glasgow, Royal Infirmary, 10 Alexandra Parade, Glasgow G3, United Kingdom : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Shishatskaya, E.I.; Volova, T.G.; Gordeev, S.A.; Puzyr, A.P.

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18.

Degradation of bioplastic in environment / T. G. Volova [и др.] // Doklady Akademii Nauk. - 2004. - Vol. 397, Is. 5. - С. 708-710 . - ISSN 0869-5652
Кл.слова (ненормированные):
Bacteria -- Ecology -- Environmental testing -- Plastics -- Weathering -- Time dependence -- Biomaterials
Аннотация: For the first time degradation kinetics is investigated for polyhydroxyalkanoates (PHA) in the native fresh pond. Its substantial variability in dependence on ecological conditions is shown, new bacteria species (clones) capable for PHA utilization in fresh-water ecosystem are identified.

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

Доп.точки доступа:
Volova, T.G.; Golyshev, M.I.; Trusova, M.Yu.; Zhila, N.O.; Kartushinskaya, M.V.

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19.

Degradation of bioplastics in natural environment. / T. G. Volova [et al.] // Doklady biological sciences : proceedings of the Academy of Sciences of the USSR, Biological sciences sections / translated from Russian. - 2004. - Vol. 397. - P330-332 . - ISSN 0012-4966
Кл.слова (ненормированные):
biopolymer -- plastic -- article -- bioremediation -- chemistry -- environment -- kinetics -- materials -- Russian Federation -- water supply -- Biodegradation, Environmental -- Biopolymers -- Environment -- Kinetics -- Manufactured Materials -- Plastics -- Russia -- Water Supply

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

Доп.точки доступа:
Volova, T.G.; Gladyshev, M.I.; Trusova, M.Y.; Zhila, N.O.; Kartushinskaya, M.V.

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20.

Tissue morphogenesis under the conditions of implantation of polyhydroxybutyrate, a biodegradable polymer. / E. I. Shishatskaya [et al.] // Doklady Biological Sciences. - 2002. - Vol. 383, Is. 1-6. - P123-126 . - ISSN 0012-4966
Кл.слова (ненормированные):
biomaterial -- hydroxybutyric acid -- polymer -- animal -- article -- bioremediation -- female -- morphogenesis -- rat -- Wistar rat -- Animals -- Biocompatible Materials -- Biodegradation, Environmental -- Female -- Hydroxybutyrates -- Morphogenesis -- Polymers -- Rats -- Rats, Wistar

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

Доп.точки доступа:
Shishatskaya, E.I.; Volova, T.G.; Puzyr, A.P.; Mogil'naya, O.A.; Efremov, S.N.; Gitelson, I.I.

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