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Table 3 Sequential model sum of squares analyzed for responses (Z-average, PDI, zeta potential, creaming index, interfacial tension, and encapsulation efficiency of primary and double emulsions)

From: Preparation of vitamin D3-loaded oil-in-water-in-oil double emulsions using psyllium gum: optimization using response surface methodology

Z-average (nm)

PDI

Source

Df

Sum of squares

F value

Prob. F

df

Sum of squares

F value

Prob. F

Mean vs total

1

4.646

  

1

11.77

  

Linear vs mean

3

1.033

14.09

 < 0.0001

3

1.30

25.49

 < 0.0001

2FI vs linear

3

1.718

3.40

0.0506

3

0.1192

3.38

0.0510

Quadratic vs 2FI

3

1.367

5.51

0.0170

3

0.0719

2.96

0.0839

Cubic vs quadratic

4

66,362.59

6.12

0.0260

4

0.0648

6.05

0.0267

residual

6

16,274.01

  

6

0.0161

  

Total

20

6.070

  

20

13.34

  

Zeta potential (mV)

Interfacial tension (mN/m)

Source

Df

Sum of squares

F value

Prob. F

df

Sum of squares

F value

Prob. F

Mean vs total

1

25,948.81

  

1

881.13

  

Linear vs mean

3

3428.59

50.95

 < 0.0001

3

74.07

8.85

0.0011

2FI vs linear

3

56.48

0.8093

0.5110

3

4.00

0.4265

0.7373

Quadratic vs 2FI

3

132.39

2.60

0.1106

3

36.64

30.60

 < 0.0001

Cubic vs quadratic

4

127.44

4.49

0.0511

4

1.43

0.8354

0.5493

residual

6

42.59

  

6

2.56

  

Total

20

29,736.30

  

20

999.82

  

Creaming index (%)

EE of the primary emulsion (%)

Source

Df

Sum of squares

F value

Prob. F

df

Sum of squares

F value

Prob. F

Mean vs Total

1

835.92

  

1

1.268

  

Linear vs Mean

3

645.86

40.68

 < 0.0001

3

2360.99

31.47

 < 0.0001

2FI vs Linear

3

3.37

0.1796

0.9083

3

32.93

0.3887

0.7631

Quadratic vs 2FI

3

62.69

11.23

0.0015

3

343.34

47.97

 < 0.0001

Cubic vs Quadratic

4

10.15

1.80

0.2473

4

12.76

1.72

0.2623

residual

6

8.46

  

6

11.10

  

Total

20

1566.45

  

20

1.296

  

EE of double emulsion (%)

Source

Df

Sum of squares

F value

Prob. F

    

Mean vs Total

1

1.588

      

Linear vs Mean

3

1457.60

16.25

 < 0.0001

    

2FI vs Linear

3

8.94

0.0825

0.9684

    

Quadratic vs 2FI

3

446.66

65.36

 < 0.0001

    

Cubic vs Quadratic

4

8.63

0.9143

0.5123

    

residual

6

14.15

      

Total

20

1.607

      
  1. EE Encapsulation efficiency