Table 3A.
Independent variables and their ranges used in response surface methodology.
| Variables | Symbols | Coded values | ||||
|---|---|---|---|---|---|---|
| –α | –1 | 0 | +1 | +α | ||
| pH | A | 6.32 | 7.0 | 8.0 | 9.0 | 9.68 |
| Starch | B | 0.16 | 0.5 | 1.0 | 1.5 | 1.84 |
| Beef extract | C | 0.08 | 0.25 | 0.5 | 0.75 | 0.92 |
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