Table 2.
Results of the antioxidant tests. DPPH test (μg/mL). Reducing power (ASE/mL). Chelating activity (mg/mL).
| Extract | DPPH Test IC50 (µg/mL)* |
Reducing Power ASE/mL** |
Chelating Activity IC50 (mg/mL)*** |
|---|---|---|---|
| Nannochloropsis gaditana | 400.00 d ± 0.01 | 32.71 d ± 0.02 | 3.52 b ± 0.18 |
| Phaeodactylum tricornutum | 380.00 b ± 0.01 | 23.98 a ± 0.11 | 9.69 c ± 0.32 |
| Nannochloris sp | 356.00 a ± 0.01 | 31.48 c ± 0.05 | 12.82 d ± 0.04 |
| Tetraselmis suecica | 394.40 c ± 0.01 | 28.55 b ± 0.03 | 2.81 a ± 0.01 |
| Standard | 3.70 ± 0.17 | 1.443 ± 0.02 | 0.01 ± 3.55E − 05 |
Values are expressed as the mean ± SD (n = 3). For each column, same letters indicate similar values (p < 0.05). * Vit C was used as positive control, ** Ascorbic acid and BHT were used as positive control; *** EDTA was used as positive control.