Table 4.
Antioxidant activity of phenolics acids and flavonoids identified in the cyanobacterial extracts
| Polyphenolics | Antioxidant activity | ||
|---|---|---|---|
| DPPH activity (IC50) (µg ml−1) | ABTS activity (IC50) (µg ml−1) | Deoxyribose protection activity (IC50) (µg ml−1) | |
| Gallic acid | 3.53 ± 0.24 | 8.85 ± 0.74 | 7.84 ± 0.72 |
| Chlorogenic acid | 6.41 ± 0.61 | 13.15 ± 0.71 | 8.53 ± 0.62 |
| Caeffic acid | 6.34 ± 0.37 | 18.04 ± 0.68 | 4.76 ± 0.67 |
| Vanillic acid | 416.7 ± 6.2 | 132.1 ± 3.4 | 91.1 ± 5.2 |
| Ferulic acid | 11.75 ± 0.75 | 9.47 ± 0.69 | 4.51 ± 0.37 |
| Rutin | 6.55 ± 0.54 | 13.78 ± 0.93 | 7.58 ± 0.66 |
| Quercetin | 4.71 ± 0.49 | 10.63 ± 0.83 | 20.1 ± 0.84 |
| Kaempferol | 17.30 ± 1.3 | 8.54 ± 0.6 | 7.17 ± 0.46 |
| BHT | 12.41 ± 1.6 | 16.12 ± 1.3 | 6.1 ± 0.45 |
| α-Tocoferol | 10.87 ± 1.2 | 32.41 ± 1.7 | 8.37 ± 0.72 |
Values represent average ± standard deviation for three replications