Table 4.
Analysis of variance for the fitted quadratic polynomial model for optimization of cellular lipid production (P < 0.05).
| Factor | SS | df | MS | F | P |
|---|---|---|---|---|---|
| Time (hours) (Q) | 11500.52 | 1 | 11500.52 | 7.57393 | 0.028419 |
| C/N ratio (L) | 25209.70 | 1 | 25209.70 | 16.60243 | 0.004722 |
| C/N ratio (Q) | 4653.90 | 1 | 4653.90 | 3.06494 | 0.123468 |
| Stirring (rpm) (L) | 104.96 | 1 | 104.96 | 0.06912 | 0.800186 |
| Time by C/N ratio | 5893.70 | 1 | 5893.70 | 3.88143 | 0.089473 |
| Time by stirring | 2386.91 | 1 | 2386.91 | 1.57196 | 0.250172 |
| C/N ratio by stirring | 12031.24 | 1 | 12031.24 | 7.92345 | 0.025964 |
| Error | 10629.04 | 7 | 1518.43 | ||
| Total SS | 62746.97 | 14 |
R2 = 0.8306.
Q, quadratic effect; L, linear effect; SS, sum of squares; df, degrees of freedom; MS, mean squares.