Journal
RADIATION AND ENVIRONMENTAL BIOPHYSICS
Volume 42, Issue 3, Pages 189-192Publisher
SPRINGER-VERLAG
DOI: 10.1007/s00411-003-0205-8
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In order to investigate the relationship between radiation dose-rate and bacterial DNA damage as well as general cellular toxicity, two recombinant Escherichia coli strains, DPD2794 and GC2 were used. Following gamma-ray irradiation, these bioluminescent bacteria showed quantitative stress responses in terms of DNA damage and general toxicity depending on the dose rates of energy deposition, i.e. dose-rate of radiation. In addition, an inverse relationship was found, at lower dose rates between 0.5 and 1 Gy/h and a parabolic relationship at dose rates between 0.5 and 2.6 Gy/h.
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