Abstract：
:The mechanism of biological activation by beta-emitting radionuclide tritium was studied. Luminous marine bacteria were used as a bioassay to monitor the biological effect of tritium with luminescence intensity as the physiological parameter tested. Two different types of tritium sources were used: HTO molecules distributed regularly in the surrounding aqueous medium, and a solid source with tritium atoms fixed on its surface (tritium-labeled films, 0.11, 0.28, 0.91, and 2.36 MBq/cm(2)). When using the tritium-labeled films, tritium penetration into the cells was prevented. The both types of tritium sources revealed similar changes in the bacterial luminescence kinetics: a delay period followed by bioluminescence activation. No monotonic dependences of bioluminescence activation efficiency on specific radioactivities of the films were found. A 15-day exposure to tritiated water (100 MBq/L) did not reveal mutations in bacterial DNA. The results obtained give preference to a "non-genomic" mechanism of bioluminescence activation by tritium. An activation of the intracellular bioluminescence process develops without penetration of tritium atoms into the cells and can be caused by intensification of trans-membrane cellular processes stimulated by ionization and radiolysis of aqueous media.
journal_name
J Environ Radioactjournal_title
Journal of environmental radioactivityauthors
Rozhko TV,Badun GA,Razzhivina IA,Guseynov OA,Guseynova VE,Kudryasheva NSdoi
10.1016/j.jenvrad.2016.03.017subject
Has Abstractpub_date
2016-06-01 00:00:00pages
131-5eissn
0265-931Xissn
1879-1700pii
S0265-931X(16)30080-7journal_volume
157pub_type
杂志文章abstract：:The Fukushima Dai-ichi Nuclear Power Plant (FDNPP) accident has caused significant radionuclide contamination. Pu isotopes at the level of GBq were released from the damaged reactors to terrestrial and marine ecosystems. In this work, 35 samples were collected at different locations of Fukushima. Samples consisted of ...
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journal_title：Journal of environmental radioactivity
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journal_title：Journal of environmental radioactivity
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journal_title：Journal of environmental radioactivity
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pub_type： 杂志文章,评审
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journal_title：Journal of environmental radioactivity
pub_type： 杂志文章
doi：10.1016/j.jenvrad.2004.08.015
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journal_title：Journal of environmental radioactivity
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journal_title：Journal of environmental radioactivity
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journal_title：Journal of environmental radioactivity
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journal_title：Journal of environmental radioactivity
pub_type： 杂志文章
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journal_title：Journal of environmental radioactivity
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journal_title：Journal of environmental radioactivity
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journal_title：Journal of environmental radioactivity
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journal_title：Journal of environmental radioactivity
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journal_title：Journal of environmental radioactivity
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journal_title：Journal of environmental radioactivity
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journal_title：Journal of environmental radioactivity
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