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A, Cell-free supernatant of sterile De Man-Rogosa Sharpe medium; B, Lactobacillus casei PTCC 1608; C, Lactobacillus rahmnosus PTCC 1637. The x-axis refers to the retention time of the antimicrobial compound (in minutes): lactic acid (LA), acetic acid (AA) and hydrogen peroxide (H2O2). Column: ymc-triart C18 (250 x 4.6 mm, HP, particle size 5 µm, flow rate 1 mL/minute) Detection: diode array detector set at 210 nm.
