Fig. 2From: Purification and identification of a surfactin biosurfactant and engine oil degradation by Bacillus velezensis KLP2016Purification of a biosurfactant and its emulsification activity against engine oil. a DEAE columnfractions emulsification activity against engine oil and A280; (b) Sephadex G-25 column eluted fractions and emulsification against engine oilBack to article page