Research Article

Improvement of Phytase Activity by a New Saccharomyces cerevisiae Strain Using Statistical Optimization

Table 6

Analysis of variance and regression analysis for the optimization of the fermentation conditions for phytase activity by S. cerevisiae in sodium phytate substrate.

Source of variationSum of squaresDegrees of freedomMean square value

Regression0.1265810.1316257.59
Residual0.0197890.001643
Lack of fit0.0197270.002818
Pure error0.0000620.00003
Total0.1463610

Coefficient of determination ; .