Table 1 Process variables used central composite design with actual factor levels corresponding to coded factor level
Independent variables (g/L) | Symbols | Code levels | ||
|---|---|---|---|---|
−1 | 0 | +1 | ||
Sucrose | A | 80 | 100 | 120 |
Ammonium acetate | B | 3 | 3.5 | 4 |
d-Tryptophan | C | 3.3 | 4.3 | 5.3 |
Independent variables (g/L) | Symbols | Code levels | ||
|---|---|---|---|---|
−1 | 0 | +1 | ||
Sucrose | A | 80 | 100 | 120 |
Ammonium acetate | B | 3 | 3.5 | 4 |
d-Tryptophan | C | 3.3 | 4.3 | 5.3 |