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Disappearance of HCH isomers after pulsing to a continuous culture of S. paucimobilis B90A (depicted as the percentage of HCH remaining compared to the initial concentration). The washout curve depicts the theoretical dilution of HCH in the chemostat due to medium replenishment. Initial established concentrations were as follows: α-HCH, 2 mg/liter; β-HCH, 5 mg/liter; γ-HCH, 7 and 0.7 mg/liter; and δ-HCH, 20 mg/liter.
