Figure 4.

DPPH scavenging activity (%) obtained 2 min after the addition of DPPH into the bittersweet fruits system containing (A) MeOH extracts or (B) water extracts of MG (green bars) and RR (red bars), and representative EPR spectra of (a) DPPH radical in MeOH (black line), and in reaction with the MG (green line) and RR (red line) fruit MeOH extracts system, and (b) DPPH radical in H₂O (black line), and in reaction with the MG (green line) and RR (red line) fruit water extracts system. (C) ^•OH scavenging activity (%) obtained 2 min after the ^•OH generation in the Fenton reaction system containing H₂O extracts of MG (green) and RR (red) bittersweet fruits, and (c) representative EPR spectra of DEPMPO/OH spin adducts obtained in the Fenton reaction system without (black line) and in reaction with the MG (green line) and RR (red line) fruit water extracts. (D) DPPH scavenging activity (%) recorded 2 min after the addition of DPPH into the system containing MeOH extracts of the skin, pulp, and seeds of MG (green) and RR (red) bittersweet fruits. Values are the means of three biological replicates, and error bars represent signal-to-noise ratio. (E) HPTLC of MeOH extracts of seed, pulp, and skin of MG and RR bittersweet berries at 366 nm, and (F) corresponding HPTLCDPPH assay.