Table 2.
Antioxidant and antiradical activity of the analyzed tannins dissolved in the model wine solution. TPC: total phenolic content; TPI, total polyphenolic index; AA, antiradical activity evaluated using 2,2-diphenyl-1-picrylhydrazyl. Data are expressed as mean of three determinations; in each column, different letters (a–f) indicate statistically significant differences. F-values, p-values, and standard errors of means are also reported.
| Sample Code | TPC (mg gallic acid/g) | TPI (Abs280nm) | AA (%) | AA/TPC |
|---|---|---|---|---|
| TP | 273 a | 7.62 a | 68.2 a | 0.25 |
| TGS | 601 c | 15.38 c | 79.5 b | 0.13 |
| TNG | 820 e | 26.64 h | 93.7 e | 0.11 |
| TOAK1 | 608 cd | 18.33 e | 92.6 de | 0.15 |
| TOAK2 | 482 b | 14.26 b | 83.1 c | 0.17 |
| TOAK3 | 693 d | 21.45 g | 91.5 de | 0.13 |
| TOAK4 | 690 d | 18.70 f | 90.6 d | 0.13 |
| TOAK5 | 585 c | 18.00 d | 92.5 de | 0.16 |
| F-value | 126.06 | 31124 | 97.28 | |
| p-value | <0.0001 | <0.0001 | <0.0001 | |
| Standard error | 14.52 | 0.0002 | 1.17 |