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Table 4 Analysis of variance for the response surface quadratic model (Eq. 8) of the extent of cell disruption

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 3292.93 9 365.88 67.15 <0.0001
Cell concentration (A) 170.08 1 170.08 31.22 0.0002
Operating pressure (B) 920.30 1 920.30 168.90 <0.0001
Number of passes (C) 1653.15 1 1653.15 303.41 <0.0001
AB 0.24 1 0.24 0.044 0.8378
AC 4.04 1 4.04 0.74 0.4091
BC 78.15 1 78.15 14.34 0.0036
A 2 33.88 1 33.88 6.22 0.0318
B 2 105.55 1 105.55 19.37 0.0013
C 2 128.56 1 128.56 23.60 0.0007
Residual 54.49 10 5.45   
Lack-of-fit 23.64 5 4.73 0.77 0.6112
Pure error 30.84 5 6.17   
Cor. total 3347.42 19    
  1. R 2 = 0.9837; adjusted R 2 = 0.9691; predicted R 2 = 0.8711; adequate precision = 32.201; coefficient of variation (%) = 3.12; standard deviation = 2.33; mean = 74.89
  2. SS sum of squares; DF degrees of freedom; MS mean sum of squares