Figure 2.

In vitro inhibition of the DPPH radical by the lipopeptides of interest at increasing concentrations. The effects on the DPPH radical of 100 to 500 mg.L⁻¹ of the compounds were compared (for the mixture, the indicated concentrations correspond to the concentration of each of the two lipopeptides). Trolox was used as the positive control. The DPPH radical scavenging activity was expressed as % of the negative control. Statistical analysis of the data was performed on 4 independent experiments using ANOVA (overall Fisher's test at the p = 0.05 level) and the Tukey's multiple a posteriori comparison test with the Graph Pad Prism software. Means without a common letter (a-h) are different (p < 0.05). Results are presented as a bar chart with means (n = 16) ± SD.