Parameter | Value for strain: | Equation | Figure(es) | ||
---|---|---|---|---|---|

168 | A163 | IC4 | |||

D
_{98} (min) | 18 | 3 | 1A | ||

D
_{105} (min) | 1.4 | 3 | 1A | ||

D
_{111} (min) | 0.2 | 22 | 3 | 1A, 1B | |

D
_{115} (min) | 2.6 | 3 | 1B | ||

D
_{120} (min) | 0.7 | 3 | 1B | ||

D
_{121} (min) | 3.2 (22) | 3 | 1C | ||

D
_{126} (min) | 1.0 (4.1) | 3 | 1C | ||

D
_{131} (min) | 0.3 (0.8) | 3 | 1C | ||

N
_{0}
| 1.3 × 10^{6} | 5.7 × 10^{5} | 2.8 × 10^{5} | 1 | 1A, 1B, 1C |

N
_{r} | 13 | 0 | 890 | 1 | 1A, 1B, 1C |

Z (°C) | 6.3 | 6.1 | 9.7 (7.3) | 3 | 1A, 1B, 1C |

A
_{1} (%) | 14 | 23 | 9.5 | 4 | 3 |

ΔT (°C) | 1.5 | 2.5 | 2.7 | 4 | 3 |

T (°C)_{c} | 108 | 121 | 131 | 4 | 3 |

↵

*a*The*D*and*Z*values, as well as the parameters*N*_{0}and*N*for spores from strains 168, A163, and IC4, result from fitting equations 1 and 3 to the data points in Fig. 1 (fits shown). For comparison the DPA release parameters of the sigmoidal fits (equation 4) shown in Fig. 2 for spores from the same strains have been indicated in the lower part of the table. The_{r}*D*value is the decimal reduction value with the inactivation temperature in the subscript;*N*is the heat-resistant rest population;_{r}*N*_{0}plus*N*equals the number of viable spores at time zero;_{r}*A*_{1}is the minimum percentage of DPA released, and*A*_{2}the maximum, fixed at 100%;*T*is the center at (_{c}*A*_{1}+*A*_{2})/2 and Δ*T*the associated temperature range. The*D*and_{r}*Z*values of the heat-resistant fraction_{r}*N*of IC4 spores are given in parentheses. It should be noted that the uncertainty in the_{r}*D*_{r121},*D*_{r131}, and*Z*values is very large._{r}