Fig. 3
From: Enhancing spontaneous biosurfactant production through water steeping of olive mill waste

(a) ATR-FTIR spectrum of biosurfactant extract obtained from corn steep liquor using chloroform in comparison with biosurfactant extract obtained from OMW using ethyl acetate; (b) ATR-FTIR spectrum of biosurfactant extract obtained from corn steep liquor using chloroform in comparison with biosurfactant extract obtained from OMW using ethyl acetate via Soxhlet.