Table 2 Experimental matrices for designs based on variables study in two levels employed for evaluation of the bergenin MAE using MeOH
Experiment | T (°C) | t (min) | Root mass (mg) | Extract (mg) | % Bergenin yielda |
|---|---|---|---|---|---|
1 | − | − | 20.2 | 1.8 | 3.94 |
2 | − | + | 20.4 | 1.9 | 4.24 |
3 | + | − | 20.3 | 1.9 | 4.71 |
4 | + | + | 20.1 | 1.2 | 7.11 |
5 | 0 | 0 | 20.5 | 2.8 | 3.07 |
6 | 0 | 0 | 20.3 | 2.4 | 3.82 |
7 | 0 | 0 | 20.1 | 2.7 | 3.24 |