the cell-free broth used in this study contained 7.9–10.2 g/L of
rhamnolipids (crude rhamnolipid solution). After purification, a
0.75% (w/v) aqueous solution was characterized according to
methodologies described in Araújo et al. [17], with surface tension
of 29.8 mN/m and critical micelle concentration (CMC) of 67 mg/L