Table IV.
Antioxidant effect exerted by the extracts, expressed as a percentage of scavenged DPPH.
| Extract | Non-hydrolyzed extract | Acid hydrolysis (A) | Alkaline hydrolysis (B) |
|---|---|---|---|
| AHw | −6.235 | 31.173 | 20.121 |
| AH50 | 14.066 | 1.323 | 6.367 |
| AH96 | 1.323 | −6.830 | 22.832 |
| CUw | 22.312 | 78.358 | 26.715 |
| CU50 | 37.257 | 47.941 | 24.296 |
| CU96 | 53.797 | 81.768 | 24.882 |
| VVw | 43.633 | 83.195 | 23.512 |
| VV50 | 53.816 | 85.330 | 21.396 |
| VV96 | 72.974 | 62.073 | 28.651 |
DPPH, 2,2-diphenyl-1-picrylhydrazyl; AH, Aesculus hippocastanum; CU, Curcuma longa; VV, Vitis vinifera; w, water extract; 50, 50% ethanol extract; 96, 96% ethanol extract; A, hydrolysis products after 1 M HCl reflux; B, hydrolysis products after NaOH reflux.