Table 7 Antioxidant activities (DPPH, ABTS, and OH scavenging) of purified EPSs produced by F. nygamai stain AJTYC1 as well as ascorbic acid and butylated hydroxytoluene at different concentrations
Treatment | Concentration (µg/ml) | % Inhibition of DPPH | IC50 (μg/ml) | % Inhibition of ABTS | IC50 (μg/ml) | % Inhibition of OH | IC50 (μg/ml) |
|---|---|---|---|---|---|---|---|
Purified EPS | 100 | 26.40 ± 1.0 | 169.6 | 8.42 ± 0.6 | 326.3 | 18.5 ± 0.3 | 397.5 |
200 | 53.00 ± 1.4 | 29.70 ± 0.9 | 25.6 ± 0.5 |  | |||
300 | 60.25 ± 1.8 | 46.61 ± 1.2 | 40.5 ± 1.0 |  | |||
400 | 70.00 ± 2.5 | 61.53 ± 1.5 | 50.3 ± 1.1 |  | |||
Ascorbic acid | 5 | 22.5 ± 1.0 | 19.05 | 30.34 ± 1.0 | 23.7 | 30.0 ± 0.2 | 27.4 |
10 | 38.9 ± 1.5 | 33.89 ± 1.2 | 35.0 ± 0.3 |  | |||
20 | 50.1 ± 1.6 | 47.93 ± 1.6 | 45.0 ± 0.4 |  | |||
40 | 70.2 ± 2.3 | 66.85 ± 1.9 | 60.3 ± 0.9 |  | |||
Butylated hydroxytoluene (BHT) | 5 | 22.1 ± 0.9 | 19.0 | 35.3 ± 1.2 | 11.8 | 20.3 ± 0.2 | 26.4 |
10 | 35.3 ± 1.3 | 50.2 ± 1.4 | 30.6 ± 0.4 |  | |||
20 | 60.2 ± 1.8 | 65.9 ± 1.6 | 45.5 ± 0.5 |  | |||
40 | 80.5 ± 2.5 | 90.4 ± 2.2 | 65.4 ± 0.7 |  |