Research Article
Ultrasound-Assisted Extraction of Total Flavonoids from Corn Silk and Their Antioxidant Activity
Table 2
Variance analysis of the regression model.
| | Sources of variance | Sum of squares | Degrees of freedom | The mean square | | Pr > | Significant |
| | Model | 0.15 | 9 | 0.016 | 3.29 | 0.0655 | | | -Ethanol concentration |
6.125 × 10−4 | 1 | 6.125 × 10−4 | 0.12 | 0.7371 | | | -extracting time | 0.026 | 1 | 0.026 | 5.27 | 0.0553 | | | -material solvent ratio | 0.015 | 1 | 0.015 | 3.05 | 0.1242 | | | 9.025 × 10−3 | 1 | 9.025 × 10−3 | 1.80 | 0.2218 | | | 0.026 | 1 | 0.026 | 5.10 | 0.0484 | | | 2.500 × 10−5 | 1 | 2.500 × 10−5 | 4.982 × 10−3 | 0.9457 | | | 0.042 | 1 | 0.042 | 8.39 | 0.0231 | | | 0.022 | 1 | 0.022 | 4.41 | 0.0739 | | | 1.684 × 10−3 | 1 | 1.684 × 10−3 | 0.34 | 0.5805 | | | The residual error | 0.035 | 7 | 5.018 × 10−3 | | | | | Loss of quasi item | 7.725 × 10−3 | 3 | 2.575 × 10−4 | 0.38 | 0.7762 | | | Pure error | 0.027 | 4 | 6.850 × 10−3 | | | | | Sum | 0.18 | 16 | | | | |
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means the difference is significant at the 0.05 level.
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