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Abstract: ɛ‐Poly‐L‐lysine (ɛ‐PL) is a novel food biopreservative with broad antimicrobial activity. In the present study, single‐factor experiments were applied to screen optimal carbon and nitrogen sources that affect the yield of a ɛ‐PL‐producing strain, Streptomyces violaceusniger, which was obtained in our laboratory recently. Box‐Behnken design and response surface methodology (RSM) were adopted...
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