Antioxidant Characterization of Oak Extracts Combining Spectrophotometric Assays and Chemometrics

Figure 1

Graph of loading plot of antioxidant markers for Serbian oak species Quercus robur L. and Quercus petraea L. Prot.: proteins; ARP: antiradical power; PRAC: permanganate reducing antioxidant capacity; FRAP: ferric reducing antioxidant power; LP: lipid peroxidation; TPC: total phenolic content; TAC: tannin content; FLC: flavonoid content; PAC: Proanthocyanidin content. Chla and Chlb: chlorophyll a and b contents; car: Carotenoid content; Pro: proline content. Parameters with close interdependence and correlation are close to each other and vice versa.