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Table 3 Analysis of variance (ANOVA) and model coefficients estimated by multiple linear regression for response surface quadratic model

From: Tailoring nutritional and process variables for hyperproduction of catalase from a novel isolated bacterium Geobacillus sp. BSS-7

Factorsa Catalase activity
Sum of squares df p value Coefficient estimate Standard error F value
Model 4.857E+009 27 0.0041 19995.27 2563.98 11.76
A 9.897E+007 1 0.0021 2312.83 1968.55 49.7
B 2.955E+008 1 0.0053 3989.95 1968.55 20.08
C 3.788E+007 1 0.0124 1430.80 1968.55 10.04
D 9.9920E+006 1 0.0134 −732.22 1968.55 32.63
E 1.830E+008 1 0.0001 3145.41 1968.55 15.06
F 7.138E+006 1 0.0244 621.15 1968.55 1.34
AB 1.353E+008 1 0.0061 −2849.29 2074.24 19.57
AC 1.562E+008 1 0.2321 3062.07 2074.24 0.81
AD 3.113E+008 1 0.0126 4322.13 2074.24 11.97
AE 2.914E+006 1 0.4421 −418.17 2074.24 0.55
AF 1.167E+005 1 0.0403 −83.70 2074.24 1.98
BC 5.052E+008 1 0.0093 5506.09 2074.24 12.54
BD 7.663E+006 1 0.0042 678.11 2074.24 2.62
BE 5.779E+007 1 0.0002 −1862.18 2074.24 3.21
BF 1.168E+008 1 0.0065 2647.28 2074.24 17.57
CD 4.738E+006 1 0.0036 −533.24 2074.24 20.12
CE 1.872E+008 1 0.2145 3351.46 2074.24 1.37
CF 9.117E+007 1 0.0003 −2339.07 2074.24 17.32
DE 3.217E+006 1 0.0074 439.34 2074.24 5.21
DF 3.978E+007 1 0.0256 −1545.12 2074.24 3.98
EF 1.216E+006 1 0.0001 270.17 2074.24 1.28
A2 5.006E+007 1 0.0215 1944.21 2326.81 6.02
B2 7.521E+007 1 0.0324 −2383.22 2326.81 8.32
C2 4.030E+008 1 0.0339 5516.38 2326.81 8.11
D2 9.377E+008 1 0.0031 8414.95 2326.81 41.39
E2 99503.63 1 0.0470 86.68 2326.81 2.21
F2 3.292E+007 1 0.0669 1576.79 2326.81 1.24
Residual 9.321E+008 13     
Lack of fit 9.321E+008 7     
Pure error 0.00 6     
Core total 6.045E+009 41     
  1. aSymbols A, B, C, D, E, F are the same as mentioned in Table 5