Table 1.
Peroxyl radical (ROO•), hydroxyl radical (HO•), hypochlorous acid (HOCl) and peroxynitrite anion (ONOO−) scavenging capacity of carotenoids and other compounds incorporated into liposomes, as well as partition ratio values.
| Compound | Scavenging Capacity a | log P b | |||
|---|---|---|---|---|---|
| ROO• | HO• | HOCl | ONOO− | ||
| β-carotene | 0.14 | 0.71 | NA | 1.02 | 14.76 ± 0.43 |
| zeaxanthin | 0.56 | 1.41 | 3.87 | 0.77 | 10.92 ± 0.45 |
| lutein | 0.60 | 0.97 | 4.81 | 0.78 | 11.52 ± 0.46 |
| lycopene | 0.08 | 0.35 | 0.40 | 0.31 | 14.53 ± 0.45 |
| fucoxanthin | 0.43 | 1.18 | 6.26 | NA | 7.30 ± 0.65 |
| canthaxanthin | 0.04 | 0.28 | 0.10 | NA | 9.53 ± 0.45 |
| astaxanthin | 0.64 | 1.66 | 9.40 | 0.73 | 8.24 ± 0.59 |
| α-tocopherol | 0.48 | 1.77 | NA | 0.37 | 10.96 ± 0.35 |
| trolox | 1.00 | 1.00 | NA | NA | 2.46 ± 0.36 |
| quercetin | 0.84 | 1.42 | 5.63 | 0.97 | 1.99 ± 1.08 |
| ascorbic acid | NA c | NA | 0.41 | 1.00 | −2.78 ± 0.42 |
| cysteine | 0.04 | NA | 1.00 | 0.02 | 0.08 ± 0.32 |
The values are the mean of two independent experiments. a The values of the ROO• and HO• scavenging capacity were calculated as equivalent to trolox, HOCl was calculated as equivalent to cysteine and ONOO− was calculated as equivalent to ascorbic acid; b Partition ratio value of the antioxidant compound between water and octanol, calculated using the ACD/ChemSketch Freeware; c NA: no activity was found within the tested concentrations.