Statistical analysis
Analysis of variance and Duncan’s test as well as average and standard error (SE) were carried out using SPSS computer program (SPSS, 1999).
Result and discussion
Antioxidant activity of pomegranate peel extracts
DPPH radical scavenging activity
Fig. 1 shows that both aqueous and methanol extract display a good antioxidant activities for all parts of the plants. In the present study, pomegranate peel extracts showed a significant variability in their inhibitory activity against DPPH radical. The highest radical scavenging activity was detected in the following order: whole >inside > outside peel extract, whether oven or solar dried for both extracts (methanol and water extract). Water as an environmental friendly solvent has been found to be very effective for antioxidant extraction from pomegranate in some studies (Singh et al., 2002; Qu et al.,