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Bacterial systems are subjected to cellular repair of different types. A recombination (rec) repair test applied to chemicals/ carcinogens produces positive results in the rec assay. Two chromium com pounds, chromium trioxide (CrO3, MW 100.01) and potassium dichrom ate (K2Cr2O7, MW 294.21) have been subjected to rec assay. The rec effect was greater with K2Cr2O7 than with CrO3. The S9 metabolic activation mixture had a detoxifying effect for both the compounds.
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Obti et al. (1997) studied this question.
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