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LD of soil before and after bioremediation for parental DT40 cell line and its Rad54−/− mutant. (a) Soils from five consecutive sampling times during 7-d cycle in the bioreactor treatment. (b) Soils from both control column and biostimulated column at four sampling points along each column after 2.5-year column treatment. Values are mean ± SD of three separate experiments. Abbreviations are as defined in Figure 1.
