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Carotenoids in bottom sediments of lake Shira as a paleoindicator for reconstruction of Lake States in Khakassiya, Russia / V. V. Zykov [et al.] // Contemporary Problems of Ecology. - 2012. - Vol. 5, Is. 4. - P434-442, DOI 10.1134/S199542551204018X . - ISSN 1995-4255
Кл.слова (ненормированные):
anaerobiosis -- bottom sediments -- holomixis -- meromixis -- okenone -- bacterium -- bioindicator -- biomarker -- carotenoid -- Holocene -- lacustrine deposit -- meromixis -- molecular analysis -- paleoclimate -- photoautotrophy -- reconstruction -- Khakassia -- Lake Shira -- Russian Federation
Аннотация: The concentrations of carotenoids buried in the bottom sediments of Lake Shira (Siberia, Khakassiya) have analyzed for the period of the last 2300 years. The bottom sediments were found to contain carotenoids, which are molecular markers of the corresponding groups of Phototrophic organisms. The bottom sediments of Lake Shira were shown to be a promising object for climate reconstructions of the Late Holocene in southern Siberia. В© 2012 Pleiades Publishing, Ltd.

Scopus
Держатели документа:
Institute of Biophysics, Siberian Branch, Russian Academy of Sciences, Akademgorodok 5, build. 50, Krasnoyarsk 660036, Russian Federation
Siberian Federal University, Svobodnyi pr. 79, Krasnoyarsk 660041, Russian Federation
Sobolev Institute of Geology and Mineralogy, Siberian Branch, Russian Academy of Sciences, Acedemika Koptyuga pr. 3, Novosibirsk 630090, Russian Federation : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Zykov, V.V.; Rogozin, D.Y.; Kalugin, I.A.; Dar'in, A.V.; Degermendzhi, A.G.

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Fluorescent coelenteramide-containing protein as a color bioindicator for low-dose radiation effects / A. S. Petrova [et al.] // Anal. Bioanal. Chem. - 2017. - Vol. 409, Is. 18. - P4377-4381, DOI 10.1007/s00216-017-0404-9. - Cited References:22. - This work was supported by the state budget allocated to the fundamental research at the Russian Academy of Sciences (project 01201351504) and by the Russian Foundation for Basic Research, Grant No. 16-34-00695. . - ISSN 1618-2642. - ISSN 1618-2650

РУБ Biochemical Research Methods + Chemistry, Analytical
Рубрики:
LUMINOUS MARINE-BACTERIA
DISCHARGED-OBELIN
AEQUORIN
Кл.слова (ненормированные):
Fluorescent protein -- Coelenteramide -- Discharged photoprotein obelin -- Multicolor bioindicator -- Radiotoxicity
Аннотация: The study addresses the application of fluorescent coelenteramide-containing proteins as color bioindicators for radiotoxicity evaluation. Biological effects of chronic low-dose radiation are under investigation. Tritiated water (200 MBq/L) was used as a model source of low-intensive ionizing radiation of beta type. 'Discharged obelin,' product of bioluminescent reaction of marine coelenterate Obelia longissimi, was used as a representative of the coelenteramide-containing proteins. Coelenteramide, fluorophore of discharged obelin, is a photochemically active molecule; it produces fluorescence forms of different color. Contributions of 'violet' and 'blue-green' forms to the visible fluorescence serve as tested parameters. The contributions depend on the coelenteramide's microenvironment in the protein, and, hence, evaluate distractive ability and toxicity of radiation. The protein samples were exposed to beta radiation for 18 days, and maximal dose accumulated by the samples was 0.28 Gy, being close to a tentative limit of a low-dose interval. Increase of relative contribution of 'violet' fluorescence under exposure to the beta irradiation was revealed. High sensitivity of the protein-based test system to low-dose ionizing radiation (to 0.03 Gy) was demonstrated. The study develops physicochemical understanding of radiotoxic effects.

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Держатели документа:
FRC KSC SB RAS, Inst Biophys SB RAS, Akademgorodok 50, Krasnoyarsk 660036, Russia.
Krasnoyarsk State Agrarian Univ, Krasnoyarsk 660049, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
Moscow MV Lomonosov State Univ, Moscow 119991, Russia.

Доп.точки доступа:
Petrova, Alena S.; Lukonina, Anna A.; Badun, Gennadii A.; Kudryasheva, Nadezhda S.; Russian Academy of Sciences [01201351504]; Russian Foundation for Basic Research [16-34-00695]

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Long-term trends and speciation of artificial radionuclides in two submerged macrophytes of the Yenisei River: A comparative study of Potamogeton lucens and Fontinalis antipyretica / T. Zotina, D. Dementyev, Y. Alexandrova // J. Environ. Radioact. - 2021. - Vol. 227. - Ст. 106461, DOI 10.1016/j.jenvrad.2020.106461 . - ISSN 0265-931X
Кл.слова (ненормированные):
Bioindicator -- Biomonitor -- Correlation with discharge -- Effective half-life -- Epiphytic biofilm -- Radiocesium -- Biomass -- Contamination -- Radioactivity -- Radioisotopes -- Rivers -- Artificial radionuclides -- Comparative studies -- Effective half-lives -- Fontinalis antipyretica -- Particulate Matter -- Positive correlations -- Radioactive contamination -- Submerged macrophytes -- River pollution
Аннотация: Long-term trends of artificial radionuclides, from 2003 to 2018, in two abundant species of macrophytes, shining pondweed, Potamogeton lucens, and water moss, Fontinalis antipyretica, have been analyzed to estimate the indicative reliability of these two species as biomonitors of radioactive contamination in a river system and to quantify the decrease in the content of artificial radionuclides in the Yenisei River. Time-dependent trends of artificial radionuclides in the biomass of these species were similar, resulting in estimates of effective half-lives for 54Mn, 58Co, 60Co, 65Zn, 137Cs, and 152Eu similar for both species. Concentrations of artificial radionuclides in biomass of shining pondweed and water moss correlated with annual discharges of the radionuclides to the Yenisei at different levels of significance, and the strongest (R2 > 0.7) positive correlation (p < 0.05) was obtained for 60Co, 65Zn, and 152Eu. Concentrations of 60Co, 137Cs, and 152Eu in water moss were 2–7.5 times higher than in shining pondweed, and considerable percentages of those isotopes were recorded in extracellular particulate matter, which was largely represented by epiphytic diatoms. Higher concentrations of artificial radionuclides in the biomass of water moss can be considered as an advantage of water moss as a monitor of radioactive contamination of the Yenisei, while shining pondweed is more useful for estimation of annual deposits of radionuclides in vegetation of the Yenisei and spatial transfer of radionuclides downstream of the discharge site. Despite differences in concentrations of artificial radionuclides, both species can be considered as reliable indicators of radioactive contamination of the river on a long-term scale. © 2020 Elsevier Ltd

Scopus
Держатели документа:
Institute of Biophysics, Federal Research Center “Krasnoyarsk Science Center” SB RAS, 50/50 Akademgorodok, Krasnoyarsk, 660036, Russian Federation
Institute of Fundamental Biology and Biotechnology, Siberian Federal University, Russian Federation, 79 Svobodny av, Krasnoyarsk, 660041, Russian Federation

Доп.точки доступа:
Zotina, T.; Dementyev, D.; Alexandrova, Y.

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РУБ Environmental Sciences
Рубрики:
HEAVY-METALS
   BRYOPHYTES
   CONTAMINATION
   BIOMASS
   PLANTS
   CS-137
   TOOL
Кл.слова (ненормированные):
Radiocesium -- Effective half-life -- Correlation with discharge -- Epiphytic -- biofilm -- Biomonitor -- Bioindicator
Аннотация: Long-term trends of artificial radionuclides, from 2003 to 2018, in two abundant species of macrophytes, shining pondweed, Potamogeton lucens, and water moss, Fontinalis antipyretica, have been analyzed to estimate the indicative reliability of these two species as biomonitors of radioactive contamination in a river system and to quantify the decrease in the content of artificial radionuclides in the Yenisei River. Time-dependent trends of artificial radionuclides in the biomass of these species were similar, resulting in estimates of effective half-lives for Mn-54, Co-58, Co-60, Zn-65, Cs-137, and Eu-152 similar for both species. Concentrations of artificial radionuclides in biomass of shining pondweed and water moss correlated with annual discharges of the radionuclides to the Yenisei at different levels of significance, and the strongest (R-2 > 0.7) positive correlation (p < 0.05) was obtained for Co-60, Zn-65, and Eu-152. Concentrations of Co-60, Cs-137, and Eu-152 in water moss were 2-7.5 times higher than in shining pondweed, and considerable percentages of those isotopes were recorded in extracellular particulate matter, which was largely represented by epiphytic diatoms. Higher concentrations of artificial radionuclides in the biomass of water moss can be considered as an advantage of water moss as a monitor of radioactive contamination of the Yenisei, while shining pondweed is more useful for estimation of annual deposits of radionuclides in vegetation of the Yenisei and spatial transfer of radionuclides downstream of the discharge site. Despite differences in concentrations of artificial radionuclides, both species can be considered as reliable indicators of radioactive contamination of the river on a long-term scale.

WOS
Держатели документа:
RAS, Krasnoyarsk Sci Ctr SB, Fed Res Ctr, Inst Biophys, 50-50 Akademgorodok, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Inst Fundamental Biol & Biotechnol, 79 Svobodny Ave, Krasnoyarsk 660041, Russia.

Доп.точки доступа:
Zotina, Tatiana; Dementyev, Dmitry; Alexandrova, Yuliyana; Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR); Krasnoyarsk Regional Scientific Foundation [18-44-240003]

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