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The toxic effect of the Fe2+ and Fe3+ ions on the luminescent recombinant Escherichia coli strain with the luxCDABE operon was studied in short- and long-term experiments. At 30-min exposure of bacteria to the iron ions, the effective concentrations of Fe2+ and Fe3+ resulting in acute toxicity (EC50) were 8.5 and 1.3 mg/L, respectively. In the long-term (24 h) experiment, during active bacterial growth,...
The daily dynamics of the number of copiotrophic and oligotrophic bacteria (in colony-forming units) and CO2 emissions from cultivated soils after short- and long-term disturbances were studied for 25–27 days in a microfield experiment. The relationship of the wavelike fluctuations of the bacterial number and CO2 emission with the succession of the soil microbial community was determined by the polymerase...
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