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Table 3 Analysis of variance for the response surface quadratic model (Eq. 7) of total protein release

From: Disruption of Pseudomonas putida by high pressure homogenization: a comparison of the predictive capacity of three process models for the efficient release of arginine deiminase

Source

SS

DF

MS

F value

P value (Prob > F)

Model

14.95

9

1.66

29.01

<0.0001

Cell concentration (A)

10.82

1

10.82

189.04

<0.0001

Operating pressure (B)

1.07

1

1.07

18.71

0.0015

No. of passes (C)

0.81

1

0.81

14.19

0.0037

AB

0.22

1

0.22

3.81

0.0796

AC

0.80

1

0.80

13.93

0.0039

BC

0.34

1

0.34

5.88

0.0358

A 2

0.12

1

0.12

2.14

0.1740

B 2

3.321 × 10−3

1

3.321 × 10−3

0.058

0.8145

C 2

0.22

1

0.22

3.88

0.0772

Residual

0.57

10

0.057

  

Lack-of-fit

0.27

5

0.054

0.88

0.5535

Pure error

0.30

5

0.061

  

Cor. total

15.52

19

   
  1. R 2 = 0.9631; adjusted R 2 = 0.9299; predicted R 2 = 0.8457; adequate precision = 19.536; coefficient of variation (%) = 7.42; standard deviation = 0.24; mean = 3.22
  2. SS sum of squares; DF degrees of freedom; MS mean sum of squares