Table 1.
Phenolic composition and 50% inhibitory concentration (IC50) of extracts.
| Samples | Phenolic composition |
IC50 (μg/mL) |
|||||
|---|---|---|---|---|---|---|---|
| Total phenols (CAE/g dried extract) | Flavonoids (QE/g dried extract) | Flavonols (QE/g dried extract) | DPPH• | OH• | NO• | ABTS• | |
| FFE | 19.01 ± 0.03 b | 4.44 ± 0.20 a | 2.41 ± 0.26b | 134.26 ± 0.98a | 82.94 ± 2.11 a | 126.51 ± 2.21 a | 222.81 ± 3.32 a |
| FFH | 21.62 ± 0.06 c | 8.64 ± 0.17 b | 6.81 ± 0.35a | 133.95 ± 1.07 a | 53.56 ± 0.03 b | 83.39 ± 0.10 b | 258.01 ± 7.28 b |
| FTE | 9.10 ± 0.05 d | 3.29 ± 0.14 c | 1.52 ± 0.28c | 383.79 ± 6.10 b | 211.37 ± 4.00 c | 538.83 ± 5.43 c | 391.20 ± 3.54 c |
| FTH | 12.86 ± 0.00 a | 4.35 ± 0.21a | 6.67 ± 0.60a | 313.53 ± 2.77 c | 173.79 ± 3.05 d | 433.17 ± 6.90 d | 394.76 ± 7.00 c |
| Vit C | 12.49 ± 0.01 d | 27.81 ± 0.10 e | 55.84 ± 1.11 e | 70.85 ± 0.03 d | |||
Values are expressed as mean ± SD of three replicates. In the same concentration the values affected with different letters (a–f) are significantly different at p < 0.05. FTE: P. guineense (stem) ethanolic extract; FTH: P. guineense (stem) hydroethanolic extract; FFE: P. guineense (leaves) ethanolic extract; FFH: P. guineense (leaves) hydroethanolic extract; VIT C: vitamin C; CAE: caffeic acid equivalent; QE: quercitine equivalent.