Table 3.
Lipid extract concentration (μg/mL) that provided inhibition of 50% (IC50) and 20% (IC20) for ABTS●+ and DPPH● assays, respectively. Trolox equivalent (TE) [μmol of Trolox/g lipid] for radical scavenging activity. Values are presented as average of three assays (n = 3) ± standard deviation. Different letters in the same line represent significant differences among macroalgae (q < 0.05, Kruskal–Wallis test followed by Dunn’s post-hoc comparisons).
| Ulva rigida | Codium tomentosum | Gracilaria gracilis | Palmaria palmata | Porphyra dioica | Fucus vesiculosus | ||
|---|---|---|---|---|---|---|---|
| ABTS●+ | IC50 | 30.7 ± 0.1 a,b | 48.1 ± 0.0 a,c | 86.4 ± 3.4 a | 23.7 ± 0.6 b,d | 41.1 ± 2.5 a,d | 27.3 ± 0.2 b,c,d |
| TE | 500.5 ± 1.7 a,b | 327.9 ± 0.2 a,b | 183.0 ± 7.1 a | 606.1 ± 14.6 b | 338.8 ± 20.5 a,b | 507.1 ± 3.5 b | |
| DPPH● | IC20 | 120.8 ± 3.8 a,b | 249.9 ± 66.7 a | 119.5 ± 1.8 a,b | 119.6 ± 8.0 a,b | 212.5 ± 7.0 a | 106.0 ± 5.6 b |
| TE | 88.0 ± 2.8 | 249.9 ± 66.7 | 89.2 ± 1.3 | 89.5 ± 6.3 | 44.9 ± 1.5 | 89.7 ± 4.6 |