Table 2. Coded and uncoded levels of independent variables used for Box-Behnken design.
| Uncoded level | Coded level | ||
|---|---|---|---|
| −1 | 0 | 1 | |
| Inoculation sizes (A, %) | 8 | 16 | 24 |
| Fermentation temperature (B, °C) | 27 | 32 | 37 |
| Fermentation time (C,h) | 5 | 7 | 9 |
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