Research Article
Extraction Optimization and Antioxidant Properties of African Eggplant (Solanum macrocarpon) Leaf Polyphenols
Table 4
ANOVA of regression equations.
| Source | Sum of squares | df | Mean square | value | value | Status |
| YIELD | Model | 124.37 | 9 | 13.82 | 16.60 | 0.0032 | Significant | Residual | 4.16 | 5 | 5 | 0.83 | | | Lack of fit | 1.69 | 3 | 3 | 0.56 | 0.46 | Not significant | Pure error | 2.47 | 2 | 2 | 1.24 | | | Cor Total | 128.54 | 14 | | | | |
| Total polyphenol content | Model | | 9 | 20608.26 | 38.050 | 0.0004 | Significant | Residual | | 5 | 541.62 | | | | Lack of fit | | 3 | 299.69 | 0.33 | 0.8087 | Not significant | Pure error | | 2 | 904.52 | | | | Cor total | | 14 | | | | |
| Total antioxidant activity | Model | 193.77 | 9 | 21.53 | 28.24 | 0.0009 | Significant | Residual | 3.81 | 5 | 0.76 | | | | Lack of fit | 2.75 | 3 | 0.92 | 1.73 | 0.3861 | Not significant | Pure error | 1.06 | 2 | 0.53 | | | | Cor total | 197.59 | 14 | | | | |
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