Table 2.
Kinetic parameters of the log-linear with tail model (for 70 and 80°C) and the log-linear with shoulder model (for 90°C) to describe the inactivation of L. monocytogenes and S. enterica on enoki and wood ear mushrooms during dehydration.
| Mushroom | Pathogen | Temperature (°C) | Sl ± SE (h) | kmax ± SE (log CFU/g/h) | N0 ± SE (log CFU/g) | Nres ± SE (log CFU/g) | r 2 | MSE | 4D reduction (h) |
|---|---|---|---|---|---|---|---|---|---|
| Enoki | L. monocytogenes | 70 | NA | 0.95 ± 0.06 | 6.39 ± 0.07 | 2.97 ± 0.17 | 0.84 | 0.2897 | ND |
| 80 | NA | 2.06 ± 0.16 | 6.50 ± 0.10 | 2.18 ± 0.16 | 0.89 | 0.4115 | 5.04 | ||
| 90 | NA | NA | NA | NA | NA | NA | NA | ||
| S. enterica | 70 | NA | 0.97 ± 0.08 | 6.50 ± 0.08 | 3.25 ± 0.19 | 0.79 | 0.3771 | ND | |
| 80 | NA | 1.89 ± 0.13 | 6.63 ± 0.08 | 2.25 ± 0.17 | 0.87 | 0.4017 | 5.28 | ||
| 90 | 0.61 ± 0.10 | 6.35 ± 0.71 | 6.48 ± 0.08 | NA | 0.81 | 0.2840 | ND | ||
| Wood ear | L. monocytogenes | 70 | NA | 2.33 ± 0.17 | 6.38 ± 0.08 | 3.08 ± 0.11 | 0.89 | 0.1987 | ND |
| 80 | NA | 3.44 ± 0.22 | 6.32 ± 0.09 | 1.89 ± 0.39 | 0.84 | 0.2922 | 2.84 | ||
| 90 | 0.44 ± 0.09 | 6.53 ± 0.49 | 6.25 ± 0.09 | NA | 0.90 | 0.2408 | 1.86 | ||
| S. enterica | 70 | NA | 2.85 ± 0.19 | 6.48 ± 0.09 | 1.75 ± 0.31 | 0.91 | 0.2408 | 3.32 | |
| 80 | NA | 3.35 ± 0.21 | 6.52 ± 0.09 | 2.16 ± 0.22 | 0.87 | 0.2616 | 2.96 | ||
| 90 | 0.55 ± 0.10 | 6.88 ± 0.65 | 6.35 ± 0.10 | NA | 0.87 | 0.2984 | 1.90 |
Sl, shoulder length (h); SE, standard error; kmax, maximum inactivation rate (log CFU/g/h); N0, initial population (log CFU/g); Nres, remaining or residual population (log CFU/g); r2, coefficient of determination; SME, mean square error; 4D reduction (h), time for a 4 log CFU/g reduction; NA, not application; ND, none determined.