Table 3. Simulated and experimental subepidermal gas concentrations skin of pears for different ambient conditions.
Condition | Ambient Atmosphere | ||||||
20.8% O2, 0% CO2 | 20.8% O2, 0% CO2 | 0% O2, 0% CO2 | |||||
T = 20°C | T = 1°C | T = 20°C | |||||
O2 (kPa) | CO2 (kPa) | O2 (kPa) | CO2 (kPa) | O2 (kPa) | CO2 (kPa) | ||
Measurement | 14.7a | 4.8a | 20.7a | 0.6a | 0.2a | 4a | |
σexperiment | 1.0a | 1.1a | 0.2a | 0.27a | 0.071a | 0.36a | |
Model | Surface | 20.8 | 0 | 20.8 | 0 | 0 | 0 |
Mean | 14 | 4.7 | 19.3 | 0.59 | 0 | 4.4 | |
Subepidermal | 9.7 | 7.7 | 18.6 | 0.97 | 0 | 7.1 |
The concentration at the outer surface of the fruit, just beneath the epidermis and the mean of both is reported. There is a good correspondence between the mean predicted concentrations and the measured ones. σ denotes the standard deviation.
Data from Lammertyn et al. [26].