Table 4.
EC50 values of valerian extracts for scavenging ability on DPPH radicals.
| Extraction Method |
EC50 Value (mg Extract/mL) 1 | |
|---|---|---|
| Roots | Rhizomes | |
| 75C0E | 0.708 ± 0.007Ab 2 | 0.928 ± 0.004Aa |
| 75C25E | 0.639 ± 0.008Bb | 0.853 ± 0.016Ba |
| 75C50E | 0.535 ± 0.010Cb | 0.765 ± 0.015Ca |
| 75C75E | 0.374 ± 0.003Db | 0.653 ± 0.007Da |
| 75C95E | 0.352 ± 0.004Eb | 0.523 ± 0.011Ea |
1 EC50 value: The effective concentration at which DPPH radicals were scavenged by 50%. EC50 value was obtained by interpolation from linear regression analysis. EC50 values of ascorbic acid, BHA, and α-Tocopherol were 15.67 ± 0.01, 16.48 ± 0.02, and 16.09 ± 0.02 µg/mL, respectively. 2 Each value is expressed as mean ± standard deviation (n = 4). Means with different capital letters within a column differ significantly (p < 0.05). Means with different lowercase letters within a row differ significantly (p < 0.05).