Table 3.
Comparison of combined PEF-thermal inactivation (experimental data) and thermal only spore inactivation (calculated values).
| Strain | Medium | U [kV] | f [Hz] | Winput [kJ/kg] | Tout,a [°C] | PEF-thermal inactivation (measured) | Thermal-only inactivation (theoretical) | Δ log |
|---|---|---|---|---|---|---|---|---|
| B. subtilis | Saline water | 8 | 140 | 188.1 | 109 | 3.2 | 1.6-5.5 | Not possible to determine |
| 150 | 226.5 | 117 | 4.7 | 2.0-6.9 | Not possible to determine | |||
| Skim milk | 13 | 90 | 130.0 | 121 | 5.0 | 1.9–6.5 | Not possible to determine | |
| G. stearothemo-philus | Saline water | 6 | 125 | 118.4 | 118 | 3.3 | 0.0-0.1 | 3.2–3.3 |
| 10 | 60 | 144 | 122 | 3.0 | 0.1–0.4 | 2.6–2.9 | ||
| Skim milk | 13 | 90 | 147 | 126 | 3.7 | 0.4–1.3 | 2.4–3.3 |
The given theoretical values for a thermal only inactivation represents ranges of inactivation assuming a simulated temperature ±2°C for an identical temperature field without PEF application.