Lactobacillus plantarum (L. plantarum) was grown in MRS broth medium at 37°C without shaking. After 24 h, the final concentration of the bacterial solution was 2 × 109 CFU/mL, which was inoculated into the new MRS Broth medium at the rate of 2% for extended culture. After 24 h of culture in a shaker, centrifuged at 4000 rpm for 10 min, take the bacterial mud for use.
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