Table 1.
DPPH radical scavenging capacities of BHA and anthraquinones a.
| Sample | DPPH Scavenging Activity (%) | |||||
|---|---|---|---|---|---|---|
| 1 µM | 10 µM | 50 µM | 100 µM | 250 µM | IC50 (µM) | |
| BHA | 1.2 ± 1.9 c | 16.4 ± 2.8 c | 59.93 ± 0.55 b | 65.4 ± 0.40 b | 62.1 ± 3.2 b | 36.5 ± 1.7 b |
| Purpurin | 8.7 ± 1.3 b | 36.8 ± 1.2 a | 78.7 ± 3.1 a | 88.0 ± 1.9 a | 92.5 ± 1.3 a | 20.9 ± 1.4 b |
| Anthrarufin | 8.56 ± 0.67 b | 18.62 ± 0.26 c | 27.5 ± 1.4 c | 35.9 ± 2.3 c | 58.2 ± 1.1 b | 225 ± 19 a |
| Chrysazin | 6.9 ± 2.3 b | 9.1 ± 4.0 d | 12.0 ± 3.1 d | 26.0 ± 7.0 d | 59.0 ± 1.7 b | 215 ± 14 a |
| Anthraquinone | 21.0 ± 1.2 a | 29.0 ± 2.1 b | 30.2 ± 1.3 c | 37.33 ± 0.31 c | 54.2 ± 2.4 c | 213 ± 22 a |
a Data are expressed as the mean ± SD (n = 3). Values in each column with the same letter are not significantly different between groups at p < 0.05.