Figure 3From: Carotenoids, total polyphenols and antioxidant activity of grapes (Vitis vinifera) cultivated in organic and conventional systemsLinear simple regression analysis. Correlations between: a- DPPH and TPC for organic; b- DPPH and TPC for conventional; c- ORAC and TPC for organic; d- ORAC and TPC for conventional. (TPC: total phenolics content; DPPH: scavenging activity assay; ORAC: oxygen radical absorbance activity).Back to article page