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CFU reduction of B. atrophaeus as function of time of exposure to PAA. Vials containing >107 CFU of biological indicator in 1 mL of a solution of 60 mg/mL acetaminophen in ethanol were spiked with 160 μg of peroxyacetic acid and allowed to incubate at room temperature for the times indicated. The vials were then subjected to lyophobic precipitation at 37 °C, 1,175 psi scCO2 with sonication for 55 min
