LRK and LL extracts exhibited different
concentrations of total phenols (tannins or flavonoids), which could
be responsible for the differences noted between the TBA assay and
DPPH, ABTS, and reducing power assays
LRK and LL treatments
resulted in less oxidation than those found in the CONTROLs in both
meats stored at 4 °C, with LRK demonstrating, by the TBA assay, the
greatest protective effect. Conversely, the DPPH, ABTS radical
scavenging and reducing power assays showed that LL treatment
gave the greatest antioxidant activity
perhaps
because of the higher total phenolic content in LL extracts. Similar
differences between phenolic compound content and antioxidant
activity have been reported for water-soluble oregano and grape seed
extracts in meat samples