Screening high yield mutant from chymosin-producing Bacillus subtilis irradiated by N~+ ion beam
Hong Feng, Wang Zhi-geng, Mei Lin, Xue Xiu-heng
Food and Fermentation Industries . 2013, (03): 120 -124 .  DOI: 10.13995/j.cnki.11-1802/ts.2013.03.016

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