Table 3.
Antioxidant potential of the investigated essential oils of T. serpyllum and T. vulgaris and positive control substances (AA—ascorbic acid; PG—propyl gallate; BHT—tert-butylated hydroxytoluene). FRAP, ferric reduction antioxidant potential; DPPH, 2,2-diphenyl-1-picrylhydrazyl; OH, hydroxyl; LP, lipid peroxidation.
| Samples | Assay | |||
|---|---|---|---|---|
| DPPH IC50 | OH IC50 (µg / mL) | LP IC50 | FRAP (mg AAE a /mL EO) | |
| X̅ b ± SD c | X̅ ± SD | X̅ ± SD | X̅ ± SD | |
| T. vulgaris | 14 ± 0.85 | 230 ± 1.19 | 19 ± 1.02 | 34.95 ± 3.50 |
| T. serpyllum | 16 ± 0.93 | 170 ± 2.02 | 17 ± 0.92 | 29.00 ± 2.90 |
| AA | / | 2003 ± 0.39 | / | / |
| PG | 0.71 ± 0.04 | 9.07 ± 0.59 | / | / |
| BHT | / | 0.03 ± 0.01 | 7.29 ± 0.56 | / |
a ascorbic acid equivalents; b mean value; c standard deviation.