Using the fluorescence intensity decay curves, the ORAC value is
calculated and expressed as lM Trolox equivalent (lM TE). ORAC
values for different sample concentrations, 10–100 lg/ml, are
illustrated in Fig. 2B. Both seed type extracts exhibited concentration-
dependent activity. White sesame seed polar-soluble crude
extract still exhibited ORAC of 4.22 lM TE at 10lg/ml, whereas
gold sesame seed extract exhibited no activity at the same concentration.
Therefore, as previously observed in the DPPH assay, ORAC
assay results showed that white sesame seed polar-soluble crude
extract exhibits higher antioxidant activity than gold sesame seed
extract.