Table 5.
Antioxidant activity comparison of main lignin subunit.
| # | Name | Structure | ARP a | NRD b | # | Name | Structure | ARP | NRD |
|---|---|---|---|---|---|---|---|---|---|
| I | Guaiacol |
|
2.6 | 1.3 | VI | Guaiacyl propanol-1 |
|
3.0 | 1.5 |
| II | Syringol |
|
3.6 | 1.8 | VII | Coniferyl alcohol |
|
4.2 | 2.1 |
| III | Guacyl propanone-1 |
|
0.2 | <0.1 | VIII | Coniferyl aldehyde |
|
1.9 | 0.97 |
| IV | propiosyringone |
|
0.5 | 0.2 | IX | Isoeugenol |
|
2.2 | 1 |
| V | Propyl guaiacol |
|
3.5 | 1.75 | X | Eugenol |
|
4 | 2 |
a ARP: antiradical power, reverse of the dose inhibiting the 50% of the DPPH radical. b NRD: number of reduced DPPH units, moles of DPPH reduced per mole of compound.