Table 1.
Antioxidant activities of E. ramosissimum extracts, including reducing power, DPPH free radical scavenging activity, and ferrous ion chelating power.
| Extracts (μg/mL) | Reducing power (OD700) | DPPH scavenging capacity (%) | Chelating activity (%) | ||||||
|---|---|---|---|---|---|---|---|---|---|
| 50 | 100 | 200 | 50 | 100 | 200 | 50 | 100 | 200 | |
| EA | 0.60 ± 0.06 | 0.79 ± 0.06 | 0.87 ± 0.23 | <10.0 | 15.23 ± 2.76 | 43.41 ± 7.68 | 20.47 ± 3.57 | 34.69 ± 5.03 | 44.56 ± 1.32 |
| DM | 0.59 ± 0.03 | 0.65 ± 0.07 | 0.68 ± 0.04 | <10.0 | <10.0 | <10.0 | 15.57 ± 1.39 | 17.49 ± 0.13 | 20.19 ± 1.72 |
| Hex | 0.56 ± 0.11 | 0.65 ± 0.10 | 0.68 ± 0.03 | <10.0 | <10.0 | <10.0 | 17.98 ± 4.50 | 20.71 ± 0.33 | 22.53 ± 6.07 |
| MeOH | 0.58 ± 0.01 | 0.67 ± 0.13 | 0.73 ± 0.02 | <10.0 | 10.69 ± 1.66 | 15.60 ± 1.28 | 10.63 ± 1.65 | 18.89 ± 1.19 | 20.43 ± 0.07 |
| Water | 0.62 ± 0.03 | 0.65 ± 0.10 | 0.70 ± 0.01 | <10.0 | <10.0 | 14.87 ± 0.73 | 10.77 ± 0.79 | 13.33 ± 4.55 | 13.52 ± 0.59 |
| Vitamin Ca | — | — | — | — | 85.55 ± 0.48 | — | — | — | — |
| BHAb | — | 1.64 ± 0.29 | — | — | — | — | — | — | — |
| EDTAc | — | — | — | — | — | — | — | 95.49 ± 0.05 | — |
All statistics are presented as average values ± SD; n = 3. aVitamin C (100 mM) was utilized as a positive control for DPPH assay; bEDTA (100 mM) was used as a positive control for analysis of metal chelating ability; cBHA (100 mM) was applied as a positive control for analysis of reducing power. Assays not performed in this study were indicated by dashes.