Fig. 6

Effect of a Temperature and b pH on antimicrobial activity of surfactin lipopeptide against B. cereus NCIM 2703 (pink and blue respectively) and S. aureus NCIM 2654 (violet) and E.coli NCIM 2832 (green). c Fourier transform infrared spectroscopy of B. velezensis SK lipopeptide extracted by HP-20 (blue) and purified by TLC (cyan), HPLC (forest green), and Silica gel chromatography (pink)