Table 4.
The independent variables selected for CCD and their coded values
| Variables | Symbol | Coded values | ||||
|---|---|---|---|---|---|---|
| −α | −1 | 0 | +1 | +α | ||
| pH | A | 6.32 | 7 | 8 | 9 | 9.68 |
| Casein | B | −0.21 | 0.10 | 0.55 | 1.00 | 1.31 |
| MgSO4 | C | 0.01 | 0.03 | 0.05 | 0.07 | 0.09 |
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