From: Antioxidant and cytotoxic activities of three species of tropical seaweeds
 | P. tetrastromatica | C. racemosa | T. ornata | Quercetin | Rutin | Catechin |
---|---|---|---|---|---|---|
Total phenolic content (mg GAE/g) | 69.5 ± 1.74 (Methanol extract) | 19.8 ± 2.01 (Methanol extract) | 71.3 ± 2.14 (Acetone extract) | - | - | - |
Total flavonoid content (mg of catechin equivalents/g dried weight) | 38.4 ± 1.64 (Methanol extract) | 16.0 ± 0.52 (EA extract) | 17.5 ± 1.06 (Hexane extract) | - | - | - |
IC50 of DPPH radical scavenging activity (μg/mL) | 171.67 ± 2.89 (EA extract) | 90.00 ± 0 (Hexane extract) | 280.67 ± 1.15 (Methanol extract) | 21.67 ± 2.89 | 23.33 ± 2.89 | - |
IC50 of superoxide anion scavenging activity (μg/mL) | ND | ND | 20.00 ± 0 (EA, acetone, methanol extracts) | 260.00 ± 0 | 223.33 ± 2.89 | - |
IC50 of nitric oxide scavenging activity (μg/mL) | ND | 38.33 ± 2.89 (DCM extract) | 25.00 ± 0 (DCM and acetone extracts) | 20.00 ± 0 | 20.00 ± 0 | - |
IC50 of hydroxyl radical scavenging activity (μg/mL) | 23.33 ± 2.89 (Hexane extract) | 20.00 ± 0 (Hexane and acetone extracts) | 20.00 ± 0 (Methanol extract) | 20.00 ± 0 | 101.67 ± 2.89 | - |