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1.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Dementyev, Dmitry, Bolsunovsky, Alexander
Заглавие : A long-term study of radionuclide concentrations in mushrooms in the 30-km zone around the Mining-and-Chemical Combine (Russia)
Колич.характеристики :10 с
Место публикации : Isot. Environ. Health Stud.: TAYLOR & FRANCIS LTD. - ISSN 1025-6016, DOI 10.1080/10256016.2020.1718124. - ISSN 1477-2639(eISSN)
Примечания : Cited References:25
Предметные рубрики: CS-137
FOREST
RADIOCESIUM
FUNGI
ACCUMULATION
ACCIDENT
Аннотация: Cs-137 concentrations were measured in mushrooms in an area affected by radioactive discharges of the Mining-and-Chemical Combine (MCC) (Rosatom, Russia) in 2002-2017. The sources of radionuclides in the study sites were global fallouts and waterborne and airborne radioactive discharges of the MCC. The mushroom species Suillus granulatus and S. luteus showed the highest Cs-137 concentrations (140-7100 Bq kg(-1)) for this area. Over the entire monitoring period, no significant change in Cs-137 concentration was observed in the Suillus spp. samples collected from the sites with the aerial deposition of radionuclides. In the floodplain site with the radionuclide deposition from water and air, a significant decrease in the average Cs-137 concentration was observed in the period between 2004 and 2017: a three-fold decrease in Suillus spp. and a nine-fold decrease in Lactarius deliciosus. The effective half-lives of Cs-137 in fruiting bodies of the mushrooms L. deliciosus and Suillus spp. in this site were 3.6 +/- 0.6 and 9.2 +/- 2.7 years, respectively.
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2.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Dementyev D., Bolsunovsky A.
Заглавие : A long-term study of radionuclide concentrations in mushrooms in the 30-km zone around the Mining-and-Chemical Combine (Russia)
Место публикации : Isot. Environ. Health Stud.: Taylor and Francis Ltd., 2020. - Article in press. - ISSN 10256016 (ISSN), DOI 10.1080/10256016.2020.1718124
Аннотация: 137Cs concentrations were measured in mushrooms in an area affected by radioactive discharges of the Mining-and-Chemical Combine (MCC) (Rosatom, Russia) in 2002–2017. The sources of radionuclides in the study sites were global fallouts and waterborne and airborne radioactive discharges of the MCC. The mushroom species Suillus granulatus and S. luteus showed the highest 137Cs concentrations (140–7100 Bq kg?1) for this area. Over the entire monitoring period, no significant change in 137Cs concentration was observed in the Suillus spp. samples collected from the sites with the aerial deposition of radionuclides. In the floodplain site with the radionuclide deposition from water and air, a significant decrease in the average 137Cs concentration was observed in the period between 2004 and 2017: a three-fold decrease in Suillus spp. and a nine-fold decrease in Lactarius deliciosus. The effective half-lives of 137Cs in fruiting bodies of the mushrooms L. deliciosus and Suillus spp. in this site were 3.6 ± 0.6 and 9.2 ± 2.7 years, respectively. © 2020, © 2020 Informa UK Limited, trading as Taylor & Francis Group.
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3.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Zotina T. A., Trofimova E. A., Dementyev D. V., Bolsunovsky A. Y.
Заглавие : Age-dependent accumulation of 137Cs by pike Esox lucius in the Yenisei River
Место публикации : Dokl. Biol. Sci. - 2016. - Vol. 468, Is. 1. - С. 133-136. - ISSN 00124966 (ISSN) , DOI 10.1134/S0012496616030108
Аннотация: Age-dependent accumulation of 137Cs in the muscles and bodies of the pike Esox lucius (aged two to seven years) inhabiting a section of the Yenisei River polluted with artificial radionuclides has been studied. The content of 137Cs in muscles varied from 0.5 to 7.0 Bq/kg of fresh weight. The maximum content of the radionuclide has been found in juveniles. The content of 137Cs in pike muscles and body decreased considerably with age. The high content of 137Cs in the muscles of juveniles is probably a consequence of their higher intensity of feeding as compared to older individuals, which is due to the intense growth of juveniles. © 2016, Pleiades Publishing, Ltd.
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4.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Bolsunovskij A.Y., Zotina T.A., Bondareva L.G.
Заглавие : An estimate of the rate of 241Am release from the biomass of aquatic plants of the Enisei river
Место публикации : Doklady Akademii Nauk. - 2003. - Vol. 392, Is. 4. - С. 560-563. - ISSN 08695652 (ISSN)
Ключевые слова (''Своб.индексиров.''): 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.
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5.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Bolsunovsky A.
Заглавие : Artificial radionuclides in aquatic plants of the Yenisei River in the area affected by effluents of a Russian plutonium complex
Место публикации : Aquatic Ecology. - 2004. - Vol. 38, Is. 1. - С. 57-62. - ISSN 13862588 (ISSN) , DOI 10.1023/B:AECO.0000020950.43944.ec
Ключевые слова (''Своб.индексиров.''): ?-radionuclides--aquatic plants--concentration factor--isotopes of plutonium--aquatic plant--bioaccumulation--effluent--radionuclide--eurasia--russian federation--yenisei river--bryophyta--fontinalis--fontinalis antipyretica--potamogeton--potamogeton lucens
Аннотация: The Yenisei River, one of the largest rivers in the world, is contaminated with artificial radionuclides released by one of the Russian nuclear plants, which produces weapons-grade plutonium and has been in operation for many years. The aim of the study that was conducted between 1997 and 2002 was to investigate accumulation of artificial radionuclides by aquatic plants of the Yenisei River. The aquatic plants sampled were: Potamogeton lucens (shining weed) and Fontinalis antipyretica (water moss). The ?-spectrometric analysis of the samples of aquatic plants for artificial radionuclides has revealed a wide spectrum of long-lived and short-lived radionuclides. Artificial radionuclides such as 51Cr, 54Mn, 58Co, 60Co, 65Zn, 137Cs, and 152Eu were found in aquatic plants collected both near the plutonium complex and 194 km downstream in the river. The radiochemical analysis of aquatic plants revealed strontium and isotopes of plutonium. Fontinalis antipyretica had very high concentration factors of the principal radionuclides: 14220, 3110 and 500 of 51Cr, 46Sc and 239Np, respectively.
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6.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Zotina T., Trofimova E., Bolsunovsky A.
Заглавие : Artificial radionuclides in fish fauna of the Yenisei River in the vicinity of the Mining-and-Chemical Combine (Siberia, Russia)
Место публикации : Radioprotection. - 2011. - Vol. 46, Is. 6 SUPPL. - С. S75-S78. - ISSN 00338451 (ISSN) , DOI 10.1051/radiopro/20116649s
Аннотация: Activities of radionuclides were measured in five species of fish (grayling, dace, crucian carp, pike, cod) sampled in the Yenisei River (Siberia, Russia) in the vicinity of the Mining-and-Chemical Combine (ROSATOM) from 2007 to 2010, with a gamma-spectrometer (Canberra, USA). The analyses of samples of organs and tissues of fish species revealed artificial (46Sc, 51Cr, 54Mn, 58,60Co, 59Fe, 65Zn, 85Sr, 99Mo, 103,106Ru, 137Cs, 141,144Ce) and natural (7Be, 40K) radionuclides in fish organs and tissues, including edible ones. The major percent (up to 80%) of 137Cs and 40K activity occurred in muscles of fish species, which also contained considerable percentages of 60Co (up to 70%) and 65Zn (up to 20%). Seasonal changes in the intake of artificial radionuclides by zoobenthos-feeding fish species (grayling and dace) were recorded and they were followed by an activity concentration increase in internal organs. The dramatic increase in radionuclide intake by grayling coincided with the change of diet source. Hence, the feeding behavior of fish can change the fluxes of artificial radionuclides in the Yenisei River. The most effective diet transfer of a radionuclide from gammarus to grayling (muscles and total body) was recorded for 40K (1.3) and much less effective for artificial nuclides. В© 2011 EDP Sciences.
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7.

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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8.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Bolsunovsky, Alexander, Dementyev, Dmitry, Trofimova, Elena
Заглавие : Biomonitoring of radioactive contamination of the Yenisei River using aquatic plants
Колич.характеристики :12 с
Коллективы : Krasnoyarsk Regional Fund of Science - Russian Foundation for Basic Research [18-44-240001]
Место публикации : J. Environ. Radioact.: ELSEVIER SCI LTD, 2020. - Vol. 211. - Ст.106100. - ISSN 0265-931X, DOI 10.1016/j.jenvrad.2019.106100. - ISSN 1879-1700(eISSN)
Примечания : Cited References:39. - The authors are grateful to researchers T. Zotina, M. Medvedeva, A. Zueva, E. Iniatkina, and Yu. Kladko of the Institute of Biophysics SB RAS (Krasnoyarsk, Russia) for their assistance in collecting plant samples and conducting cytogenetic analysis. The study was partly supported by grant of the Krasnoyarsk Regional Fund of Science - Russian Foundation for Basic Research No. 18-44-240001.
Предметные рубрики: GAMMA-EMITTING RADIONUCLIDES
ELODEA-CANADENSIS
NONHUMAN BIOTA
Аннотация: The Yenisei River is contaminated by artificial radionuclides released by one of the Russian facilities producing weapons-grade plutonium (the Mining-and-Chemical Combine, MCC), which has been in operation for 60 years. The paper presents results of long-term monitoring of radionuclide concentrations in six aquatic plant species collected from the 1400 km Yenisei River stretch downstream of the city of Krasnoyarsk. Before the last MCC reactor was shut down (in 2010), up to 30 artificial radionuclides were detected in the plant biomass, and 2 and 5 years after the reactor shutdown, 11 and 3-5 radionuclides, respectively, were detected. The highest concentrations of radionuclides were recorded in Fontinalis antipyretica. The aquatic plant Elodea canadensis, which commonly occurs in the Yenisei River, was used in the cytogenetic study. High frequencies of chromosomal aberrations (up to 33%) were revealed in cells of Elodea canadensis roots from the Yenisei region affected by the MCC radioactive discharge, at dose rates of 45-72 mu Gy/d, while in the cells of the plant roots from the reference areas, the frequency of chromosomal aberrations was 5-7%, at dose rates below 2 mu Gy/d. The higher frequencies of chromosomal aberrations in Elodea canadensis collected from the parts of the River with increased concentrations of artificial radionuclides are associated with the radiation factor. The aquatic plant Elodea canadensis can be recommended as a bio-indicator for radioactively contaminated aquatic ecosystems.
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9.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Bolsunovsky A., Dementyev D., Trofimova E.
Заглавие : Biomonitoring of radioactive contamination of the Yenisei River using aquatic plants
Место публикации : J. Environ. Radioact.: Elsevier Ltd, 2020. - Vol. 211. - Ст.106100. - ISSN 0265931X (ISSN) , DOI 10.1016/j.jenvrad.2019.106100
Аннотация: The Yenisei River is contaminated by artificial radionuclides released by one of the Russian facilities producing weapons-grade plutonium (the Mining-and-Chemical Combine, MCC), which has been in operation for 60 years. The paper presents results of long-term monitoring of radionuclide concentrations in six aquatic plant species collected from the 1400 km Yenisei River stretch downstream of the city of Krasnoyarsk. Before the last MCC reactor was shut down (in 2010), up to 30 artificial radionuclides were detected in the plant biomass, and 2 and 5 years after the reactor shutdown, 11 and 3–5 radionuclides, respectively, were detected. The highest concentrations of radionuclides were recorded in Fontinalis antipyretica. The aquatic plant Elodea canadensis, which commonly occurs in the Yenisei River, was used in the cytogenetic study. High frequencies of chromosomal aberrations (up to 33%) were revealed in cells of Elodea canadensis roots from the Yenisei region affected by the MCC radioactive discharge, at dose rates of 45–72 ?Gy/d, while in the cells of the plant roots from the reference areas, the frequency of chromosomal aberrations was 5–7%, at dose rates below 2 ?Gy/d. The higher frequencies of chromosomal aberrations in Elodea canadensis collected from the parts of the River with increased concentrations of artificial radionuclides are associated with the radiation factor. The aquatic plant Elodea canadensis can be recommended as a bio-indicator for radioactively contaminated aquatic ecosystems. © 2019 Elsevier Ltd
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Bolsunovsky A.
Заглавие : Chemical fractionation of radionuclides and stable elements in aquatic plants of the yenisei river
Место публикации : Environmental Science and Technology. - 2011. - Vol. 45, Is. 17. - С. 7143-7150. - ISSN 0013936X (ISSN) , DOI 10.1021/es2008853
Ключевые слова (''Своб.индексиров.''): 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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11.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Selivanova M.A., Rozhko T.V., Devyatlovskaya A.N., Kudryasheva N.S.
Заглавие : Comparison of chronic low-dose effects of alpha- and beta-emitting radionuclides on marine bacteria
Место публикации : Cent. Eur. J. Biol. - 2014. - Vol. 9, Is. 10. - С. 951-959. - ISSN 16443632 (ISSN) , DOI 10.2478/s11535-014-0331-0
Ключевые слова (''Своб.индексиров.''): 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.
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12.

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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13.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Bondareva L.G., Kalyakina O.P., Bolsunovskii A.Y.
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 gamma-ray spectrometry
Место публикации : J. Anal. Chem.: MAIK NAUKA/INTERPERIODICA, 2006. - Vol. 61, Is. 4. - С. 354-358. - 5. - ISSN 1061-9348, DOI 10.1134/S1061934806040101
Примечания : Cited References: 11
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 gamma-ray spectrometry. With the use of ion chromatography, it was found that processes related to the absorption of SO42- and Cl- anions by a solid phase with the release of NO3-, PO43-, 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 gamma-ray spectrometry, it was found that the release of Co-60, Eu-152, and Am-241 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: similar to 25% Am-241, similar to 3% Eu-152, and similar to 0.8% Co-60 in the system with added humic acid or 0.8% Eu-152 and 0.1% Co-60 in the system without the addition of humic acid. The Am-241 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 Co-60, Eu-152, and Am-241 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 K-40 and Cs-137 radionuclides.
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14.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Rozhko, Tatiana V., Nemtseva, Elena V., Gardt, Maria V., Raikov, Alexander V., Lisitsa, Albert E., Badun, Gennadii A., Kudryasheva, Nadezhda S.
Заглавие : Enzymatic Responses to Low-Intensity Radiation of Tritium
Колич.характеристики :15 с
Коллективы : RFBR-Krasnoyarsk Regional Foundation [N 18-44-240004, 18-44-242002]
Место публикации : Int. J. Mol. Sci.: MDPI, 2020. - Vol. 21, Is. 22. - Ст.8464. - ISSN 1422-0067(eISSN), DOI 10.3390/ijms21228464
Примечания : Cited References:59. - This work was supported by RFBR-Krasnoyarsk Regional Foundation N 18-44-240004, 18-44-242002.
Предметные рубрики: LUMINOUS MARINE-BACTERIA
IONIZING-RADIATION
DISCHARGED-OBELIN
Аннотация: The present study considers a possible role of enzymatic reactions in the adaptive response of cells to the beta-emitting radionuclide tritium under conditions of low-dose exposures. Effects of tritiated water (HTO) on the reactions of bacterial luciferase and NAD(P)H:FMN-oxidoreductase, as well as a coupled system of these two reactions, were studied at radioactivity concentrations
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15.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Rozhko T. V., Nemtseva E. V., Gardt M. V., Raikov A. V., Lisitsa A. E., Badun G. A., Kudryasheva N. S.
Заглавие : Enzymatic responses to low-intensity radiation of tritium
Место публикации : Int. J. Mol. Sci.: MDPI AG, 2020. - Vol. 21, Is. 22. - Ст.8464. - С. 1-15. - ISSN 16616596 (ISSN), DOI 10.3390/ijms21228464
Аннотация: The present study considers a possible role of enzymatic reactions in the adaptive response of cells to the beta-emitting radionuclide tritium under conditions of low-dose exposures. Effects of tritiated water (HTO) on the reactions of bacterial luciferase and NAD(P)H:FMN-oxidoreductase, as well as a coupled system of these two reactions, were studied at radioactivity concentrations ? 200 MBq/L. Additionally, one of the simplest enzymatic reactions, photobiochemical proton transfer in Coelenteramide-containing Fluorescent Protein (CLM-FP), was also investigated. We found that HTO increased the activity of NAD(P)H:FMN-oxidoreductase at the initial stage of its reaction (by up to 230%); however, a rise of luciferase activity was moderate (20%). The CLM-FP samples did not show any increase in the rate of the photobiochemical proton transfer under the exposure to HTO. The responses of the enzyme systems were compared to the ‘hormetic’ response of luminous marine bacterial cells studied earlier. We conclude that (1) the oxidoreductase reaction contributes significantly to the activation of the coupled enzyme system and bacterial cells by tritium, and (2) an increase in the organization level of biological systems promotes the hormesis phenomenon. © 2020 by the authors. Licensee MDPI, Basel, Switzerland.
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16.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Trofimova E.A., Zotina T.A., Bolsunovskii A.Y.
Заглавие : Estimation of transfer of technogenic radionuclides in food chains of the Yenisei river
Место публикации : Contemporary Problems of Ecology. - 2012. - Vol. 5, Is. 4. - С. 365-370. - ISSN 19954255 (ISSN) , DOI 10.1134/S1995425512040142
Ключевые слова (''Своб.индексиров.''): burbot--dace--grayling--pike--water moss--zoobenthos--bioaccumulation--food chain--gadoid--gamma ray radiation--macrophyte--moss--radioactive pollution--radionuclide--salmonid--trophic level--zoobenthos--russian federation--yenisei river--bryophyta--esocidae--lota
Аннотация: The efficiency of the transfer of gamma-emitting radionuclides in food chains, including macrophytes, zoobenthos, and bentho- and ichthyophagist fish, was estimated in the radiation-polluted region of the Yenisei river. Significant differences in the efficiency of the transfer of natural and technogenic radionuclides between components of different trophic levels were revealed. Substantial species-related differences in the accumulation of radionuclides in ichthyophagist fish from food were revealed. В© 2012 Pleiades Publishing, Ltd.
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17.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Bolsunovsky A., Dementyev D.
Заглавие : Evidence of the radioactive fallout in the center of asia (russia) following the fukushima nuclear accident
Место публикации : Journal of Environmental Radioactivity. - 2011. - Vol. 102, Is. 11. - С. 1062-1064. - ISSN 0265931X (ISSN) , DOI 10.1016/j.jenvrad.2011.06.007
Ключевые слова (''Своб.индексиров.''): 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.
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18.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Bolsunovskij A.Ya., Zotina T.A.
Заглавие : Experimental investigations of 241Am accumulation by macrophytes of the Yenisei River
Место публикации : Radiatsionnaya Biologiya. Radioekologiya. - 2002. - Vol. 42, Is. 2. - С. 200-203. - ISSN 08698031 (ISSN)
Ключевые слова (''Своб.индексиров.''): 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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19.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Bolsunovskij A.Ya., Kosinenko S.V.
Заглавие : Experimental investigations of the intensity of phosphorus radionuclide uptake by samples of algobacterial community of the Yenisei River
Место публикации : Radiatsionnaya Biologiya. Radioekologiya. - 2001. - Vol. 41, Is. 1. - С. 119-123. - ISSN 08698031 (ISSN)
Ключевые слова (''Своб.индексиров.''): phosphorus--alga--article--bacterium--microbiology--radiation exposure--russian federation--water pollution--algae--bacteria--phosphorus radioisotopes--siberia--water microbiology--water pollution, radioactive--algae--ecosystems--phosphorus--radioactivity--radioisotopes--river pollution--algobacterial community--radioecological concentration--yenisei river--biological radiation effects
Аннотация: The experiments in which phosphorus radionuclide was added to samples of algobacterial community of the Yenisei River taken near the production area of the Mining-and-Chemical Combine (Zheleznogorsk) made possible determining the uptake rates and coefficients of radionuclide accumulation by microorganisms. Radios between processes of adsorption and accumulation of phosphorus radionuclide by components of water seston (suspended matter) have been determined. The portion of the specific radioactivity of phosphorus adsorbed by unit mass of seston (and algae) has been found to be not more than 7% of the activity accumulated by algal cells.
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20.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Bolsunovskii A.Ya., Aleksandrova Yu.V., Degermendzhi A.G.
Заглавие : First data on technetium-99 content in the ecosystem of the Yenisei River
Место публикации : Doklady Earth Sciences. - 2010. - Vol. 434, Is. 1. - С. 1219-1221. - ISSN 1028334X (ISSN) , DOI 10.1134/S1028334X10090163
Ключевые слова (''Своб.индексиров.''): aquatic plants--concentration factors--dumping site--filtered water--laboratory conditions--maximal values--radioactive effluents--technetium 99--ecology--effluents--sewage--technetium--wastewater--water content--aquatic plant--bioaccumulation--freshwater ecosystem--radioactive pollution--river water--technetium isotope--russian federation--yenisei river--potamogeton lucens
Аннотация: The content of a long-lived technogenic radionuclide 99Tc in the Yenisei within the territory of radioactive effluents of the Rosatom mining chemical combine (MCC) has been studied. In 2008-2009 the maximal 99Tc content in water was registered near the dumping site of the MCC and came to 33 mBq/l. According to analysis of filtered water samples, technetium in the Yenisei water is presented as pertechnetate ion (TcO 4). When moving away from the MCC downstream, the 99Tc content in water is decreased, which is caused both by dilution of waste water and by 99Tc accumulation by aquatic plants. The 99Tc content in the biomass of the aquatic plant Potamogeton lucens came to 82 15 Bq/kg, and the concentration factor (CF) to 8200, which is three times more than the maximal values of the CF of 99Tc by the plants in laboratory conditions (2700). В© 2010 Pleiades Publishing, Ltd.
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