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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Bolsunovskii A.Y., Zhizhaev A.M., Saprykin A.I., Degermendzhi A.G., Rubailo A.I.
Заглавие : First data on the uranium content in water of the Yenisei River basin in the area affected by the operation of Rosatom plants
Место публикации : Doklady Earth Sciences. - 2011. - Vol. 439, Is. 1. - С. 1010-1015. - ISSN 1028334X (ISSN) , DOI 10.1134/S1028334X11070208
Ключевые слова (''Своб.индексиров.''): 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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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Bondareva L.G., Kalyakina O.P., Bolsunovskii A.Ya.
Заглавие : Effect of humic acid on absorption-release processes in the bottom sediments-Yenisei river water system as studied by dual-column ion chromatography and ?-ray spectrometry
Место публикации : Journal of Analytical Chemistry. - 2006. - Vol. 61, Is. 4. - С. 354-358. - ISSN 10619348 (ISSN) , DOI 10.1134/S1061934806040101
Ключевые слова (''Своб.индексиров.''): absorption--chromatographic analysis--complexation--gamma ray spectrometers--radioisotopes--?-ray spectrometry--absorption-release processes--dual-column ion chromatography--humic acid--organic acids
Аннотация: The effect of humic acid on absorption-release processes in the bottom sediments-Yenisei river water system was studied by dual-column ion chromatography and ?-ray spectrometry. With the use of ion chromatography, it was found that processes related to the absorption of SO 42- and Cl- anions by a solid phase with the release of NO 3- , PO 43- , and F- to a liquid phase competed in the test systems as the concentration of water-soluble organic carbon (WSOC) was increased. Only the test anions were released in the systems without the introduction of an additional amount of WSOC as humic acid. With the use of ?-ray spectrometry, it was found that the release of 60Co, 152Eu, and 241Am radionuclides to the liquid phase in the systems with added humic acid began much earlier than in the system without the addition of humic acid. In this case, the amount of released radionuclides was greater than the amount of radioisotopes released in the system without the addition of humic acid: ?25% 241Am, ?3% 152Eu, and ?0.8% 60Co in the system with added humic acid or 0.8% 152Eu and <0.1% 60Co in the system without the addition of humic acid. The 241Am radionuclide was not determined in the system without the addition of humic acid. An increase in the concentration of WSOC in the experimental system of bottom sediments-Yenisei river water initiated the release of 60Co, 152Eu, and 241Am anthropogenic radionuclides from bottom sediments because of the formation of soluble complexes capable of migration. An increase in the concentration of WSOC had almost no effect on the release of 40K and 137Cs radionuclides. В© Pleiades Publishing, Inc., 2006.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Rozhko T., Bondareva L., Mogilnaya O., Vydryakova G., Bolsunovsky A., Stom D., Kudryasheva N.
Заглавие : Detoxification of AM-241 solutions by humic substances: Bioluminescent monitoring
Место публикации : Analytical and Bioanalytical Chemistry. - 2011. - Vol. 400, Is. 2. - С. 329-334. - ISSN 16182642 (ISSN) , DOI 10.1007/s00216-010-4442-9
Ключевые слова (''Своб.индексиров.''): 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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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Bolsunovsky A., Bondareva L., Sukhorukov F., Melgunov M.
Заглавие : Accumulation of 242Pu by a macrophyte of the Yenisei River (Elodea canadensis) in laboratory experiments
Место публикации : Chemosphere. - 2009. - Vol. 75, Is. 3. - С. 284-288. - ISSN 00456535 (ISSN) , DOI 10.1016/j.chemosphere.2008.12.036
Ключевые слова (''Своб.индексиров.''): 242pu--accumulation--laboratory experiments--sequential extraction technique--submerged plant elodea canadensis--yenisei river--sup242/suppu--accumulation--laboratory experiments--sequential extraction technique--submerged plant elodea canadensis--yenisei river--biological materials--biomass--chemical plants--experiments--positive ions--rivers--plutonium--concentration (composition)--experimental study--laboratory method--macrophyte--plutonium isotope--river water--submerged vegetation--eurasia--russian federation--yenisei river--plutonium--article--biomass--chemistry--hydrocharitaceae--physiology--plant--radiation monitoring--river--time--water pollutant--biomass--hydrocharitaceae--plant shoots--plutonium--radiation monitoring--rivers--time factors--water pollutants, radioactive
Аннотация: The study addresses 242Pu accumulation by Elodea canadensis, one of the abundant species of submerged plants in the Yenisei River. 242Pu in water samples of the "Elodea - Yenisei River water" model system and in the biomass fractions was determined ?-spectrometrically, following radiochemical recovery of 242Pu using 236Pu - a chemical yield tracer. The experiments on accumulation of 242Pu by Elodea biomass showed that the activity concentration of 242Pu can reach 21 В± 2 Bq/g dry wt, with the concentration factor for 242Pu 13100 В± 2100 L/kg dry wt. Results of chemical fractionation proved that during the first few hours of the experiment 242Pu contained in Elodea was mainly concentrated in the exchangeable and the adsorbed fractions of biomass (about 100%). As Elodea biomass accumulated 242Pu, the absolute amount of 242Pu in the exchangeable and the adsorbed fractions remained almost unchanged, although the portion of 242Pu tightly bound to biomass increased. At the end of the experiment, on day 7, 242Pu tightly bound to biomass (fractions of organics and mineral residue) constituted 43-63% (in different experiments) of the total 242Pu in the biomass. В© 2008 Elsevier Ltd. All rights reserved.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Bolsunovsky A., Bondareva L.
Заглавие : Accumulation and release of 99Tc by a macrophyte of the Yenisei River (Elodea canadensis) in laboratory experiments
Место публикации : Journal of Radioanalytical and Nuclear Chemistry. - 2008. - Vol. 277, Is. 3. - С. 631-636. - ISSN 02365731 (ISSN) , DOI 10.1007/s10967-007-7148-5
Ключевые слова (''Своб.индексиров.''): technetium 99m--aquatic flora--article--biomass--controlled study--dry weight--liquid scintillation counting--macrophyte--nonhuman--radiation absorption--radiation detection--radiation dose fractionation--radiation measurement--radioactivity--river--water sampling
Аннотация: The study addresses 99Tc accumulation and release by Elodea canadensis, one of the abundant species of submerged plants in the Yenisei River. 99Tc in water samples of the "Elodea - Yenisei River water" model system and in the biomass fractions was measured using a liquid scintillation analyzer. Experiments on accumulation of 99Tc by Elodea showed that 99Tc activity concentration can reach 120В±6 Bq/g dry wt, with the concentration factor for 99Tc 2700В±500 l/kg dry wt. In experiments on 99Tc release, over 504 hours about 82% of the total 99Tc activity was released into the water from the plant; most of 99Tc was released within the first 192 hours. The data obtained using sequential chemical fractionation of biomass confirmed the experimental data on 99Tc release, which suggested that most of the biomass-bound 99Tc was adsorbed on the surface of Elodea. 99Tc tightly bound to biomass (fractions of organics and mineral residue) constituted just 17% of the total 99Tc activity. В© 2008 Akademiai Kiado, Budapest.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Bolsunovsky A., Zotina T., Bondareva L.
Заглавие : Accumulation and release of 241Am by a macrophyte of the Yenisei River (Elodea canadensis)
Место публикации : Journal of Environmental Radioactivity. - 2005. - Vol. 81, Is. 1. - С. 33-46. - ISSN 0265931X (ISSN) , DOI 10.1016/j.jenvrad.2004.10.012
Ключевые слова (''Своб.индексиров.''): 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.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Bolsunovsky A.
Заглавие : Artificial radionuclides in sediment of the Yenisei River
Место публикации : Chemistry and Ecology. - 2010. - Vol. 26, Is. 6. - С. 401-409. - ISSN 02757540 (ISSN) , DOI 10.1080/02757540.2010.504668
Ключевые слова (''Своб.индексиров.''): 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.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Bondareva L., Vlasova I., Mogilnaya O., Bolsunovsky A., Kalmykov S.
Заглавие : Microdistribution of 241Am in structures of submerged macrophyte Elodea canadensis growing in the Yenisei River
Место публикации : Journal of Environmental Radioactivity. - 2010. - Vol. 101, Is. 1. - С. 16-21. - ISSN 0265931X (ISSN) , DOI 10.1016/j.jenvrad.2009.08.003
Ключевые слова (''Своб.индексиров.''): 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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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Tret'Yakov G.A., Kalugin I.A., Dar'In A.V., Rogozin D.Yu., Degermendzhi A.G.
Заглавие : Physicochemical conditions of seasonal carbonate precipitation in Shira lake (Khakasia)
Место публикации : Doklady Earth Sciences. - 2012. - Vol. 446, Is. 1. - С. 1099-1101. - ISSN 1028334X (ISSN) , DOI 10.1134/S1028334X12090152
Ключевые слова (''Своб.индексиров.''): carbonate sediment--lacustrine deposit--physicochemical property--precipitation (chemistry)--khakassia--lake shira--russian federation
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Zhila N.O., Kalacheva G.S., Volova T.G., Degermendzhi A.G.
Заглавие : Structure of hydrocarbons synthesized by the alga Botryococcus isolated from Lake Shira.
Место публикации : Doklady biological sciences : proceedings of the Academy of Sciences of the USSR, Biological sciences sections / translated from Russian. - 2001. - Vol. 378. - С. 265-269. - ISSN 00124966 (ISSN)
Ключевые слова (''Своб.индексиров.''): fatty acid--hydrocarbon--sea water--article--chemical structure--chemistry--classification--green alga--isolation and purification--metabolism--microbiology--russian federation--species difference--algae, green--fatty acids--hydrocarbons--molecular structure--seawater--siberia--species specificity
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11.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Rogozin D.Y., Zykov V.V., Kalugin I.A., Daryin A.V., Degermendzhy A.G.
Заглавие : Carotenoids of phototrophic organisms in bottom sediments of meromictic Lake Shira (Siberia, Russia) as an indicator of past stratification
Место публикации : Doklady Biological Sciences. - 2011. - Vol. 439, Is. 1. - С. 228-231. - ISSN 00124966 (ISSN) , DOI 10.1134/S0012496611040077
Ключевые слова (''Своб.индексиров.''): carotenoid--chlorophyll--water--animal--article--chemistry--ecosystem--lake--metabolism--microbiology--photosynthesis--phototrophy--pigmentation--russian federation--sediment--animals--carotenoids--chlorophyll--ecosystem--geologic sediments--lakes--photosynthesis--phototrophic processes--pigmentation--russia--siberia--water--water microbiology
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12.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Prokopkin I.G., Mooij W.M., Janse J.H., Degermendzhy A.G.
Заглавие : A general one-dimensional vertical ecosystem model of Lake Shira (Russia, Khakasia): Description, parametrization and analysis
Место публикации : Aquatic Ecology. - 2010. - Vol. 44, Is. 3. - С. 585-618. - ISSN 13862588 (ISSN) , DOI 10.1007/s10452-010-9326-8
Ключевые слова (''Своб.индексиров.''): meromictic brackish lake--one-dimensional vertical ecological model--sensitivity analysis--alga--biomass--brackish water--diffusion--ecosystem modeling--meromictic lake--microbial community--model test--nutrient--one-dimensional modeling--parameterization--phytoplankton--seasonality--sensitivity analysis--solar radiation--vertical profile--water chemistry--water temperature--zooplankton--khakassia--lake shira--russian federation--algae
Аннотация: A one-dimensional ecological model of the meromictic brackish Lake Shira (Russia, Khakasia) was developed. The model incorporates state-of-the-art knowledge about the functioning of the lake ecosystem using the most recent field observations and ideas from PCLake, a general ecosystem model of shallow freshwater lakes. The model of Lake Shira presented here takes into account the vertical dynamics of biomasses of the main species of algae, zooplankton and microbial community, as well as the dynamics of oxygen, detritus, nutrients and hydrogen sulphide from spring to autumn. Solar radiation, temperature and diffusion are modelled using real meteorological data. The parameters of the model were calibrated to the field data, after applying different methods of sensitivity analysis to the model. The resulting patterns of phytoplankton and nutrients dynamics show a good qualitative and quantitative agreement with the field observations during the whole summer season. Results are less satisfactory with respect to the vertical distribution of zooplankton biomass. We hypothesize that this is due to the fact that the current model does not take the sex and age structure of zooplankton into account. The dynamics of oxygen, hydrogen sulphide and the modelled positions of the chemocline and thermocline are again in good agreement with field data. This resemblance confirms the validity of the approach we took in the model regarding the main physical, chemical and ecological processes. This general model opens the way for checking various hypotheses on the functioning of the Lake Shira ecosystem in future investigations and for analysing options for management of this economically important lake. В© 2010 Springer Science+Business Media B.V.
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13.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Zotina T.A., Kalachova G.S., Bolsunovsky A.Ya., Degermendzhy A.G.
Заглавие : 241Am distribution in the biomass of freshwater macrophytes
Место публикации : Doklady Biological Sciences. - 2008. - Vol. 421, Is. 1. - С. 254-256. - ISSN 00124966 (ISSN) , DOI 10.1134/S0012496608040108
Ключевые слова (''Своб.индексиров.''): americium--carbohydrate--cellulose--lipid--nitrogen--polysaccharide--vegetable protein--article--biomass--bryopsida--cell membrane--cell wall--chemistry--cytoplasm--food chain--growth, development and aging--hydrocharitaceae--metabolism--americium--biomass--bryopsida--carbohydrates--cell membrane--cell wall--cellulose--cytoplasm--food chain--hydrocharitaceae--lipids--nitrogen--plant proteins--polysaccharides
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14.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Rogozin D.Yu., Pimenov N.V., Kosolapov D.B., Chan'kovskaya Yu.V., Degermendzhy A.G.
Заглавие : Thin-layer vertical distribution of purple sulfur bacteria in the chemoclines of meromictic lakes Shira and Shunet (Khakasia, Southern Siberia)
Место публикации : Doklady Akademii Nauk. - 2005. - Vol. 400, Is. 3. - С. 426-429. - ISSN 08695652 (ISSN)
Ключевые слова (''Своб.индексиров.''): bacteria--bathymetry--biochemistry--geochemistry--physical chemistry--water bacteriology--bathometers--vertical distribution--lakes
Аннотация: Vertical inhomogeneity of microbial population, biogeochemical processes and physicochemical characteristics of chemocline was revealed using specially created stratification bathometer (sampler) consisting of syringes horizontally placed one over another on a carrying frame.
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15.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Bolsunovskij A.Ya., Ermakov A.I., Burger M., Degermendzhy A.G., Sobolev A.I.
Заглавие : Accumulation of artificial radionuclides by the Yenisei river aquatic plants in the area affected by the activity of the Mining-and-Chemical Combine
Место публикации : Radiatsionnaya Biologiya. Radioekologiya. - 2002. - Vol. 42, Is. 2. - С. 194-199. - ISSN 08698031 (ISSN)
Ключевые слова (''Своб.индексиров.''): 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).
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16.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Boyandin A., Kalacheva G.S., Medvedeva S., Rodicheva E., Volova T.G.
Заглавие : Luminous bacteria as producers of polyhydroxyalkanoates
Место публикации : Macromolecular Symposia. - 2008. - Vol. 269, Is. 1. - С. 17-22. - ISSN 10221360 (ISSN) , DOI 10.1002/masy.200850904
Ключевые слова (''Своб.индексиров.''): luminous bacteria--polyhydroxyalkanoates--polyhydroxybutyrate--abs resins--acids--bacteriology--batch cell culture--biological materials--biomass--biopolymers--biotechnology--cell culture--esters--hydrocarbons--organic compounds--polymers--renewable energy resources--supramolecular chemistry--batch cultures--dry cells--luminous bacteria--micro-organisms--photobacterium leiognathi--photobacterium phosphoreum--polyhydroxyalkanoates--polyhydroxybutyrate--polymer yields--vibrio fischeri--bioluminescence
Аннотация: The study addresses the ability of luminous bacteria of different taxa (Photobacterium leiognathi, Photobacterium phosphoreum, Vibrio harveyi, Vibrio fischeri) to synthesize polyesters of hydrocarbon acids (polyhydroxyalkanoates, PHAs) as storage macromolecules. The screened strains widely varied in their PHA productivity. Conditions for attaining high polymer yields (including two- and three-component polymers) in batch culture have been determined. The attained polymer yields reached 40-70% of dry cell biomass. The results suggest a conclusion that luminous microorganisms can be considered as producers of multi-component PHAs. Copyright В© 2008 WILEY-VCH Verlag GmbH & Co. KGaA.
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17.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Volova T.G., Voinova O.N., Kalacheva G.S., Grodnitskaya I.D.
Заглавие : The prospects of the use of resorbable polyesters for designing safe pesticides
Место публикации : Doklady Biological Sciences. - 2008. - Vol. 419, Is. 1. - С. 100-103. - ISSN 00124966 (ISSN) , DOI 10.1134/S0012496608020099
Ключевые слова (''Своб.индексиров.''): pesticide--polyester--article--chemistry--drug design--metabolism--microbiology--drug design--pesticides--polyesters--soil microbiology
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18.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Boyandin A.N., Kalacheva G.S., Rodicheva E.K., Volova T.G.
Заглавие : Luminous bacteria as potential producers of resorbed polyhydroxyalkanoate polyesters
Место публикации : Doklady Biochemistry and Biophysics. - 2007. - Vol. 416, Is. 1-6. - С. 248-251. - ISSN 16076729 (ISSN) , DOI 10.1134/S1607672907050067
Ключевые слова (''Своб.индексиров.''): photoprotein--polyester--polyhydroxyalkanoic acid--article--bacterium--chemistry--chemoluminescence--classification--genetic procedures--genetics--metabolism--photobacterium--phylogeny--time--bacteria--biosensing techniques--chemiluminescent measurements--luminescent proteins--photobacterium--phylogeny--polyesters--polyhydroxyalkanoates--time factors--bacteria (microorganisms)
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19.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Volova T.G., Gladyshev M.I., Trusova M.Y., Zhila N.O.
Заглавие : Degradation of polyhydroxyalkanoates in eutrophic reservoir
Место публикации : Polymer Degradation and Stability. - 2007. - Vol. 92, Is. 4. - С. 580-586. - ISSN 01413910 (ISSN) , DOI 10.1016/j.polymdegradstab.2007.01.011
Ключевые слова (''Своб.индексиров.''): 16s rdna--degradation--dgge--polyhydroxyalkanoates--reservoir--biodegradation--climate change--ecosystems--eutrophication--genetic engineering--physical chemistry--eutrophic reservoir--phylogenetic analysis--physicochemical properties--polyhydroxyalkanoates--organic polymers
Аннотация: During the summers of 1999-2001 the dynamics of polyhydroxyalkanoate degradation in a small recreational eutrophic reservoir was studied experimentally. It has been shown that biodegradation of polyhydroxyalkanoates in the environment is determined by the structure and physicochemical properties of the polymer and by local weather conditions, which influence the state of the aquatic ecosystem. Species (clones) of bacteria able to utilize polyhydroxyalkanoates in the reservoir were identified using molecular phylogenetic analysis of 16S rRNA genes. В© 2007 Elsevier Ltd. All rights reserved.
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20.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Volova T.G., Trusova M.Y., Kalacheva G.S., Kozhevnicov I.V.
Заглавие : Physiological-biochemical properties and the ability to synthesize polyhydroxyalkanoates of the glucose-utilizing strain of the hydrogen bacterium Ralstonia eutropha B8562.
Место публикации : Applied microbiology and biotechnology. - 2006. - Vol. 73, Is. 2. - С. 429-433. - ISSN 01757598 (ISSN) , DOI 10.1007/s00253-006-0460-0
Ключевые слова (''Своб.индексиров.''): beta hydroxyvaleric acid--beta-hydroxyvaleric acid--carbon dioxide--ester--fatty acid--fructose--glucose--hexanoic acid derivative--hydrogen--hydroxyacid--oxygen--polymer--ribosome rna--valeric acid derivative--article--biotechnology--chemistry--metabolism--methodology--wautersia eutropha--biotechnology--carbon dioxide--cupriavidus necator--esters--fatty acids--fructose--glucose--hexanoic acids--hydrogen--hydroxy acids--oxygen--pentanoic acids--polymers--rna, ribosomal
Аннотация: Physiological-biochemical, genetic, and cultural properties of the glucose-utilizing mutant strain Ralstonia eutropha B8562 have been compared with those of its parent strain R. eutropha B5786. It has been shown that growth characteristics of the strain cultured on glucose as the sole carbon and energy source are comparable with those of the parent strain. Strain B8562 is characterized by high polyhydroxyalkanoate (PHA) yields on different carbon sources (CO(2), fructose, and glucose). PHA accumulation in the strain batch cultured on glucose under nitrogen deficiency reaches 90 %. The major monomer in the PHA is beta-hydroxybutyric acid (more than 99 mol %); the identified minor components are beta-hydroxyvaleric acid (0.25-0.72 mol %) and beta-hydroxyhexanoic acid (0.08-1.5 mol %). The strain is a promising PHA producer on available sugar-containing media with glucose.
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