Table 4.
Composite design matrix and results of act-D production.
| Run N° | Natural values |
Coded values |
Y (mgL−1) | (mgL−1) | |||||
|---|---|---|---|---|---|---|---|---|---|
| NaNO3 (gL−1) | K2HPO4 (gL−1) | pH | x0 | x3 | x4 | x6 | |||
| 1 | 2 | 0.6 | 5.2 | 1 | -1 | -1 | -1 | 290.31 | 220.69 |
| 2 | 4 | 0.6 | 5.2 | 1 | +1 | -1 | -1 | 337.40 | 313.50 |
| 3 | 2 | 1.4 | 5.2 | 1 | -1 | +1 | -1 | 169.42 | 93.67 |
| 4 | 4 | 1.4 | 5.2 | 1 | +1 | +1 | -1 | 177.89 | 186.47 |
| 5 | 2 | 0.6 | 9.2 | 1 | -1 | -1 | +1 | 401 | 392.12 |
| 6 | 4 | 0.6 | 9.2 | 1 | +1 | -1 | +1 | 635.86 | 484.93 |
| 7 | 2 | 1.4 | 9.2 | 1 | -1 | +1 | +1 | 408.91 | 265.09 |
| 8 | 4 | 1.4 | 9.2 | 1 | +1 | +1 | +1 | 452,60 | 357.90 |
| 9 | 1 | 1 | 7.2 | 1 | -1.68 | 0 | 0 | 75.20 | 157.38 |
| 10 | 5 | 1 | 7.2 | 1 | +1.68 | 0 | 0 | 253.56 | 313.29 |
| 11 | 3 | 0.2 | 7.2 | 1 | 0 | -1.68 | 0 | 548.73 | 548.17 |
| 12 | 3 | 1.8 | 7.2 | 1 | 0 | +1.68 | 0 | 304.51 | 334.76 |
| 13 | 3 | 1 | 3.2 | 1 | 0 | 0 | -1.68 | 74.07 | 74.12 |
| 14 | 3 | 1 | 11.2 | 1 | 0 | 0 | +1.68 | 220.26 | 362.12 |
| 15 | 3 | 1 | 7.2 | 1 | 0 | 0 | 0 | 493.03 | 441.47 |
| 16 | 3 | 1 | 7.2 | 1 | 0 | 0 | 0 | 420.45 | 441.47 |
| 17 | 3 | 1 | 7.2 | 1 | 0 | 0 | 0 | 436.13 | 441.47 |