Table 5.
Radical scavenging activity (DPPH and ABTS) and ferric reducing power (FRAP) of ethanolic leaf extract and isolates.
| Tests Materials | DPPH (RSa50 (µg/mL)) | ABTS (RSa50 (µg/mL)) | FRAP (RC50 (µg/mL)) |
|---|---|---|---|
| Leaf extract | 16.36 ± 0.77 b | 13.44 ± 0.82 b | 39.85 ± 0.96 d |
| 12 | 17.93 ± 0.82 b | 35.20 ± 0.88 d | 24.09 ± 0.41 b |
| 6 | 14.97 ± 0.86 b | 22.31 ± 1.20 b | 25.31 ± 0.52 d |
| 5 | 24.29 ± 2.03 c | 17.41 ± 1.00 b | 15.07 ± 0.41 b |
| 7 | 19.10 ± 1.50 c | 14.41 ± 0.24 b | 19.50 ± 4.50 b |
| Vitamin C | 8.92 ± 0.06 a | 2.71 ± 0.08 a | 13.94 ± 0.07 a |
Values are expressed as mean ± SEM. Along each column, values with the same letter superscripts are not significantly different, Bonferroni test (p > 0.05). RSa50 of DPPH and ABTS in µg/mL; RC50 of FRAP in µg/mL.