Table 3.
The antioxidant and free radical-scavenging activity of E. dendroides flower (FE), leaf (LE), fruit (FrE), and branch (BE) hydroalcoholic extracts. Results were expressed as the half-inhibitory concentration (IC50 μg/mL) with confident limits (C.L.) at 95%.
| Assay | FE | LE | FrE | BE | Standard a |
|---|---|---|---|---|---|
| IC50 µg/mL (C.L.) | |||||
| ORAC | 3.68 (1.30–5.46) | 6.39 (5.32–7.58) | 4.35 (2.15–8.79) | 8.39 (6.87–10.25) | 0.68 (0.38–1.27) * |
| TEAC | 5.85 (4.90–6.98) ° | 22.31 (17.31–28.76) Ψ | 13.88 (11.46–16.02) | 14.17 (11.62–17.28) | 2.89 (1.79–3.37) * |
| ICA | 297.97 (147.01–403.96) | 201.74 (167.03–243.68) | 149.64 (76.74–291.77) | 293.66 (247.85–347.93) & | 6.62 (5.35–7.89) * |
| FRAP | 10.36 (3.82–28.09) $ | 42.26 (33.19–53.81) | 20.53 (10.35–40.70) | 49.95 (13.12–68.38) | 3.70 (1.65–6.29) * |
| DPPH | 17.86 (15.75–20.26) ° | 31.75 (27.25–36.99) | 25.72 (21.31–31.05) | 30.07 (25.81–35.04) | 3.95 (1.39–5.65) * |
| BCB | 12.63 (9.52–16.75) & | 24.01 (17.14–33.63) | 14.62 (10.87–19.66) £ | 30.96 (21.16–45.30) | 0.24 (0.17–0.32) * |
a Trolox for ORAC, TEAC, FRAP and DPPH; Ethylenediaminetetraacetic acid (EDTA) for iron-chelating activity and butylhydroxytoluene (BHT) for β-carotene bleaching; ICA, Iron-chelating activity; BCB, β-carotene bleaching. * p < 0.001 vs. all E. dendroides extracts; ° p < 0.001 vs. LE, FrE, BE; Ψ p < 0.001 vs. FrE and BE; & p < 0.001 vs. LE and FrE; $ p < 0.001 vs. LE; £ p < 0.001 vs. BE.