From:  Numerical modeling of thermal inactivation parameters of Escherichia coli O157:H7 in pretreated watermelon juice

 Effect of inactivation temperature and pH on thermal inactivation parameters of Escherichia coli O157:H7 in pretreated watermelon juice.

S/NpHTemperature (°C)D-value (min)F-value (min)z-value (°C)Activation energy, Ea (kJ/mol)
14.57021.0 ± 1.24c42.0 ± 2.37c8.0 ± 0.02a42.03 ± 2.43b
8017.7 ± 1.12b35.4 ± 2.29b
9011.8 ± 1.07a23.6 ± 2.26a
25.57022.6 ± 1.36c45.2 ± 2.39c9.2 ± 0.06b32.49 ± 2.33a
8018.1 ± 1.20b36.2 ± 2.30b
9013.7 ± 1.11a27.4 ± 2.25a
36.57023.4 ± 2.38c46.8 ± 2.41c9.6 ± 0.07b35.26 ± 2.34a
8020.0 ± 2.22b40.0 ± 2.39b
9014.5 ± 2.14a29.0 ± 2.28a

Values are means ± standard deviation, values in the columns with the same superscripts are not significantly different at (p < 0.05).