Table 5.
Ferrous ion chelating capacities of Thymus ethanolic extracts.
| Samples | Iron(II) chelating ability ± SD | ||||
|---|---|---|---|---|---|
| 37.5 μg/mL | 75 μg/mL | 150 μg/mL | 300 μg/mL | 600 μg/mL | |
| T. longicaulis | na | 1.92 ± 0.03a | 15.13 ± 2.71a | 58.05 ± 2.17a | 77.30 ± 0.68a,c |
| T. praecox subsp. polytrichus | na | na | 1.30 ± 0.95b | 39.19 ± 0.48b | 75.72 ± 0.25a,b |
| T. pulegioides | na | na | 9.32 ± 3.06a,c | 57.34 ± 0.93a | 77.40 ± 1.07a,c |
| T. serpyllum subsp. serpyllum | na | na | 2.47 ± 0.44b | 46.04 ± 0.44c | 74.41 ± 1.89b |
| T. striatus | na | na | 3.07 ± 4.34b,c | 46.44 ± 0.42c | 78.61 ± 0.84c |
| T. vulgaris | 6.85 ± 3.07 | 19.61 ± 1.52b | 64.38 ± 1.47d | 92.71 ± 1.38e | 95.70 ± 0.03d |
na: no activity. Mean values in the same column followed by different letters are significantly different from each other (P < 0.05).