Table 5.
Analysis of variance (ANOVA) for the fitted quadratic polynomial model for the production of NHase by Rhodococcus rhodochrous (RS-6).
| Source | Sum of squares | df | Mean square | F value | P-value Prob > F | |
|---|---|---|---|---|---|---|
| Model | 531.88 | 20 | 26.59 | 296.78 | < 0.0001 | significant |
| A-Incubation period | 6.63 | 1 | 6.63 | 74.02 | <0.0001 | |
| B-Temperature | 1.19 | 1 | 1.19 | 13.29 | 0.0045 | |
| C-pH | 13.11 | 1 | 13.11 | 146.28 | <0.0001 | |
| D-Glycerol | 21.51 | 1 | 21.51 | 240.07 | <0.0001 | |
| E-Urea | 147.28 | 1 | 147.28 | 1643.53 | <0.0001 | |
| AB | 0.9475 | 1 | 0.9475 | 10.57 | 0.0087 | |
| AC | 1.60 | 1 | 1.60 | 17.83 | 0.0018 | |
| AD | 0.4861 | 1 | 0.4861 | 5.42 | 0.0421 | |
| AE | 14.83 | 1 | 14.83 | 165.47 | <0.0001 | |
| BC | 0.5628 | 1 | 0.5628 | 6.28 | 0.0311 | |
| BD | 8.29 | 1 | 8.29 | 92.50 | <0.0001 | |
| BE | 15.63 | 1 | 15.63 | 174.44 | <0.0001 | |
| CD | 0.7096 | 1 | 0.7096 | 7.92 | 0.0183 | |
| CE | 4.73 | 1 | 4.73 | 52.75 | <0.0001 | |
| DE | 11.11 | 1 | 11.11 | 123.93 | <0.0001 | |
| A2 | 2.83 | 1 | 2.83 | 31.62 | 0.0002 | |
| B2 | 3.25 | 1 | 3.25 | 36.25 | 0.0001 | |
| C2 | 6.12 | 1 | 6.12 | 68.35 | <0.0001 | |
| D2 | 70.90 | 1 | 70.90 | 791.21 | <0.0001 | |
| E2 | 49.54 | 1 | 49.54 | 552.84 | <0.0001 | |
| Residual | 0.8961 | 10 | 0.0896 | |||
| Lack of Fit | 0.0703 | 5 | 0.0141 | 0.0851 | 0.9914 | not significant |
| Pure Error | 0.8258 | 5 | 0.1652 | |||
| Corrected Total | 532.78 | 30 |