Table 2.
Hydrogen peroxide generation by PMS-NADH and H2O2 scavenging reactions in the presence of 200 μM phenol and alk(en)yl phenol compounds.
| Compounds (200 μM) | H2O2 formation (%) from O2-* |
H2O2 scavenging activity (%) ** |
|---|---|---|
| Salicylic acid (5) | 107 ± 1 | 0 ± 0 |
| Anacardic acid C15:0 (6) | 18 ± 0 | –2 ± 1 |
| Anacardic acid C15:1 (7) | 48 ± 2 | 1 ± 0 |
| Anacardic acid C15:2 (8) | 83 ± 2 | –1 ± 0 |
| Anacardic acid C15:3 (9) | 89 ± 1 | 1 ± 3 |
| Cardanol C15:0 (10) | 14 ± 4 | 0 ± 1 |
| Cardanol C15:1 (11) | 29 ± 9 | 3 ± 2 |
| Cardanol C15:2 (12) | 39 ± 1 | 1 ± 2 |
| Cardanol C15:3 (13) | 28 ± 0 | 2 ± 0 |
| Cardol C15:0 (14) | 22 ± 3 | –6 ± 0 |
| Cardol C15:2 (15) | 14 ± 2 | –8 ± 1 |
| Cardol C15:3(16) | 42 ± 2 | –7 ± 2 |
| Gallic acid (1) | 319 ±14 | –35 ± 1 |
| Caffeic acid (3) | 308 ± 2 | –66 ± 2 |
* Values of H2O2 generation from O2- in the presence of the compound were indicated as the H2O2 generation in the presence of DMSO is 100%.
**Values were indicated the decrease (%) of H2O2 concentration from 70 μM H2O2 (100%) after 4 min from the addition of the compound.