The Scientific World Journal / 2013 / Article / Tab 3

Research Article

Evaluation and Optimization of Downstream Process Parameters for Extraction of Betulinic Acid from the Bark of Ziziphus jujubae L.

Table 3

ANOVA for response surface quadratic model to verify whether developed model is significant or nonsignificant.

SourceSum of squaresDegree of freedomMean square -value value
Prob. >

Model0.2198590.02410.69980.0005Significant
-pH0.0005210.00050.226790.6441
-time0.0124510.0125.451330.0417
-temp.0.1494510.14965.4605<0.0001
0.0004510.00040.197110.6665
0.004510.00040.197110.6665
0.0012510.00120.547520.4763
0.0438810.04419.21910.0014
0.0133410.0135.845050.0362
0.0003510.00030.153160.7037
Residual0.02283100.0022
Lack of fit0.0087550.00170.621070.6930Nonsignificant

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