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Summary of kinetic models of antioxidant activity by capture of the ABTS radical.
| Variety | Model | R 2 | Sig.* | ||
| ABTS | DPPH | ABTS | DPPH | ||
| Bourbon | Linear | 0.080 | 0.365 | 0.095 | 0.000 |
| Quadratic | 0.348 | 0.740 | 0.001 | 0.000 | |
| Cubic | 0.737 | 0.921 | 0.000 | 0.000 | |
| Caturra | Linear | 0.068 | 0.242 | 0.124 | 0.002 |
| Quadratic | 0.381 | 0.667 | 0.000 | 0.000 | |
| Cubic | 0.634 | 0.864 | 0.000 | 0.000 | |
| Catimor | Linear | 0.117 | 0.155 | 0.041 | 0.018 |
| Quadratic | 0.465 | 0.758 | 0.000 | 0.000 | |
| Cubic | 0.718 | 0.857 | 0.000 | 0.000 | |
*Statistical significance of the regression model.
