Purification and identification of a surfactin biosurfactant and engine oil degradation by

摘要

Surface tension and cmc measured against the logarithm concentration of biosurfactant containingcell-free broth. a surface tension and cmc of cell-free broth from B. velezensis inoculated in LB broth; (b) surface tension and cmc of cell-free broth from B. velezensis inoculated inMSM broth. Surface tension at 35 ℃ was reduced from 55 to 40 mN m−1 by cell-free broth of B. velezensis grown in Luria Bertani broth