Table 4 Values of IC50 (mg mL−1) resultant from various crude extracts of various antioxidant assays.
Antioxidant assay | Seaweed species | IC50 (mg mL−1) values of different crude extracts | |||
---|---|---|---|---|---|
Ascorbic acid | Methanol | Ethanol | Water | ||
DPPH assay | P. tetrastromatica | 0.00297 ± 0.0005a | 0.40 ± 0.12b | 1.54 ± 0.03c | 3.31 ± 0.04d |
G. tenuistipitata | 2.59 ± 0.08b | 3.68 ± 0.07c | 5.04 ± 0.10d | ||
ABTS radical scavenging assay | P. tetrastromatica | 0.160 ± 0.006a | 1.33 ± 0.09b | 2.31 ± 0.06c | 4.22 ± 0.11d |
G. tenuistipitata | 3.01 ± 0.10b | 4.69 ± 0.08c | 5.91 ± 0.03d | ||
H2O2 scavenging assay | P. tetrastromatica | 0.0783 ± 0.004a | 3.08 ± 0.05b | 4.10 ± 0.04c | 9.41 ± 0.09d |
G. tenuistipitata | 3.69 ± 0.11b | 4.78 ± 0.05c | 7.32 ± 0.07d | ||
NO scavenging assay | P. tetrastromatica | 0.0824 ± 0.008a | 0.75 ± 0.03b | 4.55 ± 0.05c | 12.94 ± 0.06d |
G. tenuistipitata | 2.93 ± 0.04b | 7.16 ± 0.04c | 10.31 ± 0.03d |