Table 4 Factorial fractional design matrix FF 24−1 (real and coded values) with their respective responses (enzymatic activity). The experiments were conducted at 28 °C and 140 rpm
Run | Variablesa.b | Xylanase (U/mL) | |||
|---|---|---|---|---|---|
pH | Inoculum (pellets) | Peptone | RS | ||
1 | 6 (−1) | 5 (−1) | 0 (−1) | 70 (−1) | 135.30 |
2 | 8 (1) | 5 (−1) | 0 (−1) | 110 (1) | 91.21 |
3 | 6 (−1) | 7 (1) | 0 (−1) | 110 (1) | 104.78 |
4 | 8 (1) | 7 (1) | 0 (−1) | 70 (−1) | 124.37 |
5 | 6 (−1) | 5 (−1) | 80 (1) | 110 (1) | 63.69 |
6 | 8 (1) | 5 (−1) | 80 (1) | 70 (−1) | 61.43 |
7 | 6 (−1) | 7 (1) | 80 (1) | 70 (−1) | 79.90 |
8 | 8 (1) | 7 (1) | 80 (1) | 110 (1) | 42.97 |
9 (C) | 7 (0) | 6 (0) | 40 (0) | 90 (0) | 73.12 |
10 (C) | 7 (0) | 6 (0) | 40 (0) | 90 (0) | 72.74 |
11 (C) | 7 (0) | 6 (0) | 40 (0) | 90 (0) | 88.19 |
12 (C) | 7 (0) | 6 (0) | 40 (0) | 90 (0) | 50.50 |