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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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Sediments of the Yenisei River: Monitoring of radionuclide levels and estimation of sedimentation rates / A. Bolsunovsky, D. Dementyev // IAHS-AISH Publication. - 2010. - Vol. 337: Symposium on Sediment Dynamics for a Changing Future (14 June 2010 through 18 June 2010, Warsaw) Conference code: 84220. - P143-148
Кл.слова (ненормированные):
Artificial and natural radionuclides -- Dating methods -- River sediments -- Sedimentation rates -- Yenisei river -- Dating methods -- Natural radionuclides -- River sediments -- Sedimentation rates -- Yenisei river -- Anoxic sediments -- Cesium -- Europium -- Lead -- Nuclear energy -- Nuclear weapons -- Plutonium -- Radioisotopes -- River pollution -- Sedimentation -- Sedimentology -- Strontium -- Uranium -- Rivers -- cesium isotope -- cobalt isotope -- europium -- fluvial deposit -- plutonium isotope -- radioactive pollution -- radioactive waste -- radionuclide -- sampling -- sediment core -- sediment pollution -- sedimentation rate -- Krasnoyarsk [Russian Federation] -- Russian Federation -- Yenisei River
Аннотация: The Yenisei River, one of the largest rivers in the world, is contaminated with artificial radionuclides released by a Russian nuclear facility producing weapon-grade plutonium, which has been in operation for many years. Examination of Yenisei River sediment samples revealed the presence of artificial radionuclides typical of radioactive discharge from the Mining-and-Chemical- Combine (MCC) nuclear facility: isotopes of europium ( 152Eu, 154Eu, and 155Eu), caesium ( 137Cs and 134Cs), 60Co, 90Sr, and transuranium elements. Maximum radionuclide concentrations in sediments remained high as far as 240 km downstream of the MCC. In sediment cores collected upstream of the MCC, ?-spectrometric measurements registered only one artificial radionuclide, 137Cs, with a maximum activity of approx. 8 Bq kg -1 dry mass. Sediments of the Yenisei River also contain natural radionuclides. Sedimentation rates in several sections of the Yenisei River were determined using, different approaches: the 210Pb dating method and the ratios of artificial radionuclides - 137Cs/ 60Co and 152Eu/ 154Eu. With increasing distance downstream of the city of Krasnoyarsk, sedimentation rates increased from 0.88 cm year -1 to 1.30-1.51 cm year -1. Copyright В© 2010 IAHS Press.

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

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

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Temperature dependence of exchange inhomogeneity characteristics in amorphous CoP alloys / R. S. Iskhakov, G. I. Fish, R. G. Khlebopros // Solid State Communications. - 1983. - Vol. 45, Is. 11. - P961-962 . - ISSN 0038-1098
Кл.слова (ненормированные):
COBALT PHOSPHORUS ALLOYS
Аннотация: It has been first shown experimentally that stochastical characteristics of exchange fluctuation in amorphous alloy CoP (P = 9-12 at.%) are mainly caused by compositional (chemical) disorder, i.e. by the degree of supersaturation of solid solution but not by the type of structural state. В© 1983.

Scopus
Держатели документа:
L.V. Kirensky Institute of Physics, Krasnoyarsk, Russian Federation : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Iskhakov, R.S.; Fish, G.I.; Khlebopros, R.G.

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Preparation and X-ray crystallographic analysis of recombinant obelin crystals diffracting to beyond 1.1 angstrom [Text] / E. S. Vysotski [et al.] // Acta Crystallogr. Sect. D-Biol. Crystallogr. - 2001. - Vol. 57. - P1919-1921, DOI 10.1107/S0907444901016523. - Cited References: 16 . - ISSN 0907-4449

РУБ Biochemical Research Methods + Biochemistry & Molecular Biology + Biophysics + Crystallography
Рубрики:
PHOTOPROTEIN AEQUORIN
   LONGISSIMA
   EVOLUTION
   CDNA
Аннотация: Crystals of recombinant obelin, the Ca2+-regulated photoprotein from the marine hydroid Obelia longissima, have been grown from a solution containing PEG 8000 and potassium phosphate. Hexamine-cobalt trichloride was used as an additive to increase the chance of crystallization. The crystals grow in a light yellow cubic form (0.5 x 0.5 x 0.45 mm) which diffracts to beyond 1.1 Angstrom resolution. The crystals belong to the space group C2, with unit-cell parameters a=83.43, b=54.92, c=52.99 Angstrom, beta = 112.00 degrees. The asymmetric unit contains one molecule. Crystals exposed to calcium ion before and after X-ray irradiation emit light, confirming that the crystals consist of an active photoprotein.

Держатели документа:
Univ Georgia, Dept Biochem & Mol Biol, Athens, GA 30602 USA
Russian Acad Sci, Siberian Branch, Inst Biophys, Photobiol Lab, Krasnoyarsk 660036, Russia
ИБФ СО РАН : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Vysotski, E.S.; Liu, Z.J.; Rose, J...; Wang, R.C.; Lee, J...

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Effects of Nanodiamonds of Explosive Synthesis on the Skin of Experimental Animals Locally Exposed to Cobalt and Chrome Ions / V. I. Prokhorenkov [et al.] // Bull. Exp. Biol. Med. - 2014. - Vol. 158, Is. 2. - P264-267, DOI 10.1007/s10517-014-2737-0 . - ISSN 0007-4888
Кл.слова (ненормированные):
allergic contact dermatitis -- chrome -- cobalt -- ions of bivalent metals -- nanodiamonds -- chromium -- cobalt -- nanodiamond -- adsorption -- animal -- chemistry -- Dermatitis, Allergic Contact -- drug effects -- guinea pig -- nonparametric test -- skin -- Adsorption -- Animals -- Chromium -- Cobalt -- Dermatitis, Allergic Contact -- Guinea Pigs -- Nanodiamonds -- Skin -- Statistics, Nonparametric
Аннотация: Experiments in vivo demonstrated the protective effect of modified nanodiamonds on guinea pig skin after local exposure cobalt ions, but not chrome ions. The observed differences are determined by different adsorption of these ions by nanodiamonds: in vitro experiments showed that nanodiamonds adsorbed cobalt ions, but not chrome ions from water solutions. The perspectives of using modified nanodiamonds as a new adsorbent for prevention of allergic contact dermatitis induced by ions of bivalent metals are discussed. © 2014, Springer Science+Business Media New York.

Scopus
Держатели документа:
V. F. Voino-Yasenetsky Krasnoyarsk State Medical University, Ministry of Health of the Russian Federation, Krasnoyarsk, Russian Federation
Institute of Biophysics, Siberian Division of Russian Academy of Sciences, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Prokhorenkov, V. I.; Vasil’eva, E. Y.; Puzyr’, A. P.; Bondar’, V. S.

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Unique diversity of radioactive particles found in the Yenisei River floodplain / A. Bolsunovsky [et al.] // Sci Rep. - 2017. - Vol. 7. - Ст. 11132, DOI 10.1038/s41598-017-11557-7. - Cited References:22. - The authors are grateful to researchers of the Institute of Biophysics FRC KSC SB RAS (Krasnoyarsk, Russia) and the Institute of Geology and Mineralogy SB RAS (Novosibirsk, Russia) for their assistance in isolation and analysis of radioactive particles. Part of the work is also supported by the Research Council of Norway through its Centres of Excellence funding scheme, project number 223268/F50. Investigations of the particles were partially supported by IAEA (Project 17941). . - ISSN 2045-2322

РУБ Multidisciplinary Sciences
Рубрики:
CONTAINING CONTROL RODS
   TRANSURANIC ELEMENTS
   BOTTOM SEDIMENTS
   HOT
Аннотация: The long-term operation of three reactors and the radiochemical plant of the Mining-and-Chemical Combine (MCC), Russia's largest producer of weapons-grade plutonium, has resulted in radioactive contamination of the Yenisei River floodplain. From 1995 to 2016, we found more than 200 radioactive particles (RP) in the Yenisei floodplain, downstream of the MCC. Analytical characterization showed that most of the RP were fuel particles, which were carried into the river after incidents at the MCC reactors. Having compared the Cs-137/Cs-134 ratios in the particles, we determined three time intervals when the RP were formed. The plutonium isotope ratios (Pu-238/Pu-239,Pu-240) vary substantially between the particles and indicate several different source terms. In addition to fuel RP, we found particles that only contained activation products (Co-60 or europium isotopes). SEM and gamma-spectrometry showed that the cobalt particles could have originated from the corrosion of the reactor coolant system and the europium particles -from the damaged compensating rods. No europium particles have been found anywhere else in the world. The presence of RP from different sources (fuel, cobalt, and europium particles) in the Yenisei River floodplain makes this region a unique site for studying environmental effects of the particles. These RP represent point sources of radioecological significance.

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Держатели документа:
FRC Krasnoyarsk Sci Ctr SB RAS, Inst Biophys SB RAS, Krasnoyarsk 660036, Russia.
Russian Acad Sci, Inst Geol & Mineral SB, Novosibirsk 630090, Russia.
Norwegian Univ Life Sci, Ctr Environm Radioact, As, Norway.

Доп.точки доступа:
Bolsunovsky, Alexander; Melgunov, Mikhail; Chuguevskii, Alexey; Lind, Ole Christian; Salbu, Brit; Research Council of Norway through its Centres of Excellence funding scheme [223268/F50]; IAEA [17941]

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