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Table 2 ANOVA for response surface quadratic model

From: Ultrasound-assisted lipase-catalyzed synthesis of D-isoascorbyl palmitate: process optimization and Kinetic evaluation

Source

Sum of squares

df

Mean square

F -value

p-value

Model

5292.98

14

378.07

20.67

< 0.0001**

A

481.91

1

481.91

26.35

0.0001**

B

2288.43

1

2288.43

125.12

< 0.0001**

C

292.92

1

292.92

16.02

0.0012**

D

1384.64

1

1384.64

75.71

< 0.0001**

AB

24.27

1

24.27

1.33

0.2674

AC

2.41

1

2.41

0.13

0.7219

AD

10.44

1

10.44

0.57

0.4616

BC

0.15

1

0.15

0.01

0.9301

BD

192.20

1

192.20

10.51

0.0055**

CD

0.05

1

0.05

0.00

0.9599

A2

106.51

1

106.51

5.82

0.0291*

B2

253.27

1

253.27

13.85

0.0020**

C2

244.59

1

244.59

13.37

0.0023**

D2

259.45

1

259.45

14.19

0.0019**

Residual

274.34

15

18.29

  

Lack of fit

273.59

10

27.36

182.63

< 0.0001

Pure error

0.75

5

0.15

  

Cor total

5567.33

29

   

R-squared = 0.9570

Adj-squared = 0.9047

Ade precision = 16.756

  1. **Significant at 1% level *Significant at 5% level C.V. % = 6.36.