The second research activity under FRAP, the exposure characterization study, was a pilot-scale effort to collect information on synthetic turf field users and to conduct a human exposure measurement substudy.
Results indicated that the aqueous ethanolic extract showed most TPC at 337.20[+ or -]10.43 mg gallic acid equivalent (GAE) per 100 grams, with DPPH at 58.39[+ or -]2.80%, FRAP at 190.84[+ or -]6.15 [micro]molFe2+ per gram and beta-carotene at 61.68[+ or -]1.77%.
Due to detection of high levels of quercetin in CS (which is known to be a strong antioxidant) in FRAP and Hydroxyl Radical tests, it is inferred that this compound could be used as an anticancer material.
According to the results obtained from the FRAP assay, UM extract (2.02 mM [Fe.sub.2]+/mg extract) has stronger ferric reducing antioxidant power activity than MM extract (p>0.05).
Results from partial least squares regression and path analysis showed that POD activity had a direct effect and GSH content had an indirect effect on [H.sub.2][O.sub.2] content, while TEAC, FRAP, and NBT radical-scavenging activities had little effect on H2 O2 content.