Modelling the Survival of Escherichia coli O157:H7 on Raw Portioned Tomatoes, Inoculated with Aspergillus fumigatus and Emericella nidulans
Table 2
Fitting parameters of the Weibull function, in its classical [12] and reparameterized forms [8], regarding the death kinetic of E. coli O157:H7 on tomato portions preinoculated with E. nidulans DSMZ 820 and A. fumigatus DSMZ 819.
RMSSE
RMSSE
E. nidulans
C
4.48 1.3
9.27 0.2
0.958
0.088
13.05 1.5
0.964
0.019
C
2.37 0.4
8.18 0.2
0.984
0.083
15.61 1.8
0.984
0.018
C
1.43 0.2
6.18 0.4
0.989
0.093
14.09 2.1
0.989
0.020
A. fumigates
C
1.54 0.3
7.35 0.5
0.983
0.095
20.09 3.4
0.983
0.020
C
1.61 0.3
6.80 0.5
0.979
0.119
17.82 2.9
0.979
0.025
C
2.02 0.4
6.62 0.5
0.982
0.134
14.22 2.5
0.982
0.028
Control
C
1.11 0.3
1.97 0.1
0.951
0.632
7.79 1.0
0.951
0.136
C
0.92 0.3
1.42 0.9
0.950
0.636
7.52 1.2
0.950
0.137
C
1.01 0.2
1.68 0.9
0.958
0.580
7.72 1.1
0.958
0.125
: shape parameter; : first reduction time (days) (time to attain a 1-log reduction in the cell number of E. coli O157:H7); : regression coefficient; RMSEE: root mean sum of squared error. : death time of E. coli O157:H7 (days), evaluated through the Weibull function, cast in the standardized form; : regression coefficient; RMSSE: root mean sum squared error. letters indicate the significant differences in a column: values with different superscripts are significantly different () (one-way ANOVA and Tukey’s test).
