Table 3.
Growth parameters of L. monocytogenes ATCC 7644 cells, previously exposed to increasing CHY concentrations, in presence of pH 6.0 (well A11) and pH 5.0 (A12). Results are obtained from the Baranyi and Roberts model. The table displays: Lag phase (h), Maximum growth rate (Omnilog unit/h) the final (Vf) cell density value (Omnilog unit), the R-squared (R2), the standard error (SE) and the assessment of the fitting model (Model).
| pH Value |
CHY (µL mL−1) |
Lag Phase (h) |
Maximum Rate (Omnilog Unit/h) |
Vf (Omnilog Unit) |
R2 | SE | Model |
|---|---|---|---|---|---|---|---|
| 6.0 | 0 (Ctrl) | 2.53 ± 0.08 | 105.08 ± 7.50 | 186.55 ± 1.46 | 0.997 | 4.60 | Complete |
| 6.0 | 250 | 1.09 ± 0.50 | 28.41 ± 2.88 | 168.79 ± 2.92 | 0.980 | 8.57 | Complete |
| 6.0 | 300 | 6.54 ± 0.23 | 62.51 ± 8.14 | 185.90 ± 4.84 | 0.987 | 9.31 | Complete |
| 6.0 | 350 | 13.36 ± 0.14 | 56.29 ± 3.79 | 220.15 ± 3.10 | 0.995 | 6.12 | Complete |
| 6.0 | 400 | 14.28 ± 0.19 | 46.67 ± 4.13 | 176.93 ± 3.31 | 0.991 | 6.60 | Complete |
| 6.0 | 500 | - | - | - | - | - | Unmodelable |
| 5.0 | 0 (Ctrl) | 4.78 ± 0.21 | 56.60 ± 6.56 | 160.06 ± 2.25 | 0.990 | 7.23 | Complete |
| 5.0 | 250 | 8.24 ± 0.29 | 44.58 ± 6.58 | 162.51 ± 3.32 | 0.983 | 9.08 | Complete |
| 5.0 | 300 | 17.16 ± 0.24 | 45.93 ± 5.84 | 161.80 ± 4.19 | 0.982 | 7.97 | Complete |
| 5.0 | 350 | 22.69 ± 0.18 | 81.56 ± 13.86 | 189.28 ± 4.12 | 0.981 | 8.76 | Complete |
| 5.0 | 400 | 35.45 ± 1.18 | 4.98 ± 0.48 | - | 0.876 | 9.71 | No asymptote |
| 5.0 | 500 | - | - | - | - | - | Unmodelable |