Table 4.
Fe 2+ chelating activity of lichen extracts and quercetin as the reference.
| Extracts/ Substance |
Chelating Fe2+ [%] | IC50 [mg/mL] |
||||
|---|---|---|---|---|---|---|
| Concentration [mg/mL] | ||||||
| 0.08 | 0.16 | 0.8 | 1.6 | 4.0 | ||
| DCM extract | 7.9 ± 0.3 c | 13.8 ± 0.7 c | 35.6 ± 0.8 d | 51.7 ± 3.6 c | 61.4 ± 1.3 c | 1.83 ± 0.21 d |
| Ace extract | 6.5 ± 0.1 dc | 7.0 ± 1.3 d | 20.7 ± 0.2 e | 36.6 ± 5.6 d | 40.0 ± 3.2 d | 4.0 e |
| MeOH extract | 10.9 ± 0.5 b | 16.9 ± 1.5 c | 52.9 ± 2.7 b | 79.3 ± 2.2 b | 96.1 ± 0.3 a | 0.55 ± 0.02 b |
| MeOH-H2O extract | 36.0 ± 1.3 a | 64.2 ± 1.8 a | 90.9 ± 2.4 a | 98.0 ± 0.2 a | 100.2 ± 0.9 a | 0.10 ± 0.01 a |
| H2O extract | 34.4 ± 0.9 a | 48.2 ± 2.5 b | 92.8 ± 0.5 a | 96.5 ± 0.3 d | 99.2 ± 0.5 a | 0.15 ± 0.01 a |
| Quercetin | 5.2 ± 0.9 d | 16.2 ± 0.8 c | 42.5 ± 1.0 c | 54.2 ± 1.7 c | 72.6 ± 1.8 b | 1.17 ± 0.03 c |
Mean values within a column with the same letter are not significantly different at p 0.05 using Duncan’s test. The first letter of the alphabet for the highest values, the next for statistically significant decreasing values. The mean values ± SEM from n = 4 independent measurements (extracts) or from n = 6 independent measurements (quercetin).