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Plot of log reduction of B. atrophaeus and B. pumilus as function of amount of PAA in vial. Different amounts of peroxyacetic acid were added to ~2 × 107 CFU of biological indicator in 1 mL of a solution of 60 mg/mL acetaminophen in ethanol then subjected to lyophobic precipitation at 37 °C, 8.1 MPa scCO2 with sonication for 55 min. filled circles, B. atrophaeus; unfilled circles, B. pumilus
