Effect of americium-241 on luminous bacteria. Role of peroxides

Тип публикации: статья из журнала

Год издания: 2011

Идентификатор DOI: 10.1016/j.jenvrad.2011.02.011

Ключевые слова: Luminous bacteria, Radiotoxicity, Am-241, Hormesis, Peroxide, Am-241, Hormesis, Luminous bacteria, Peroxide, Radiotoxicity, Am-241, Aquatic solutions, Bacterial cells, Enhanced luminescence, Growth of bacteria, Hormesis, Luminous bacteria, Nutrient media, Peroxide concentration, Photobacterium phosphoreum, Radioactive decay, Radiotoxicity, Room temperature, Secondary product, Specific activity, Water solutions, Americium, Bacteriology, Hydrogen peroxide, Luminance, Oxidation, Phosphorescence, Quantum yield, Radioactivity, Radioisotopes, Bioluminescence, americium 241, hydrogen peroxide, peroxide, americium, bacterium, bioluminescence, growth rate, hydrogen peroxide, inhibition, radionuclide, toxicity, alpha radiation, article, bacterial cell, bacterial growth, bacterium, bioluminescence, concentration response, controlled study, environmental monitoring, nonhuman, Photobacterium phosphoreum, quantum yield, radiation exposure, radioisotope decay, room temperature, Americium, Chemiluminescent Measurements, Densitometry, Hydrogen Peroxide, Kinetics, Luminescent Proteins, Photobacterium, Radiation Monitoring, Temperature, Bacteria (microorganisms), Photobacterium phosphoreum

Аннотация: The effect of americium-241 (Am-241) an alpha-emitting radionuclide of high specific activity, on luminous bacteria Photobacterium phosphoreum was studied. Traces of Am-241 in nutrient media (0.16 -6.67 kBq/L) suppressed the growth of bacteria, but enhanced luminescence intensity and quantum yield at room temperature. Lower temperature (4 degrees C) increased the time of bacterial luminescence and revealed a stage of bioluminescence inhibition after 150 h of bioluminescence registration start. The role of conditions of exposure the bacterial cells to the Am-241 is discussed. The effect of Am-241 on luminous bacteria was attributed to peroxide compounds generated in water solutions as secondary products of radioactive decay. Increase of peroxide concentration in Am-241 solutions was demonstrated; and the similarity of 241Am and hydrogen peroxide effects on bacterial luminescence was revealed. The study provides a scientific basis for elaboration of bioluminescence-based assay to monitor radiotoxicity of alpha-emitting radionuclides in aquatic solutions. (C) 2011 Elsevier Ltd. All rights reserved.

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Издание

Журнал: JOURNAL OF ENVIRONMENTAL RADIOACTIVITY

Выпуск журнала: Vol. 102, Is. 4

Номера страниц: 407-411

ISSN журнала: 0265931X

Место издания: OXFORD

Издатель: ELSEVIER SCI LTD

Авторы

  • Alexandrova M. (Siberian Federal University)
  • Rozhko T. (Siberian Federal University)
  • Kudryasheva N. (Institute of Biophysics SB RAS)
  • Vydryakova G. (Institute of Biophysics SB RAS)

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