Table 4.
Analysis of variance of the degree of purity of L-arabinose calculated with a quadratic equation obtained from experimental results
| Source | Sum of Squares | df | Mean Square | F-Value | Probability > F |
|---|---|---|---|---|---|
| Model | 3093.963 | 9 | 343.7737 | 5.603423 | 0.0063 |
| X1 | 452.6256 | 1 | 452.6256 | 7.377682 | 0.0217 |
| X2 | 163.2006 | 1 | 163.2006 | 2.660129 | 0.1339 |
| X3 | 1515.156 | 1 | 1515.156 | 24.69665 | 0.0006 |
| (X1)(X2) | 22.11125 | 1 | 22.11125 | 0.360408 | 0.5616 |
| (X1)(X3) | 2.53125 | 1 | 2.53125 | 0.041259 | 0.8431 |
| (X2)(X3) | 12.25125 | 1 | 12.25125 | 0.199692 | 0.6645 |
| (X1)2 | 190.7719 | 1 | 190.7719 | 3.109534 | 0.1083 |
| (X2)2 | 498.9091 | 1 | 498.9091 | 8.132091 | 0.0172 |
| (X3)2 | 583.413 | 1 | 583.413 | 9.509483 | 0.0116 |
| Residual | 613.5065 | 10 | 61.35065 | ||
| Lack of Fit | 611.0115 | 5 | 122.2023 | 244.8944 | < 0.0001 |
| Pure Error | 2.495 | 5 | 0.499 | ||
| Total | 3707.47 | 19 |
X1, X2 and X3 correspond to fermentation time, temperature and concentration of xylose mother liquor, respectively; df, degrees of freedom