3. Results and discussion
3.1. Cooling curves The average temperature and temperature range (maximum and minimum temperatures) of Freezer A with no quick freeze function and Freezer B with a quick freeze compartment are shown in Table 1. The average temperature of Freezer A was _15 ฑ 0 _C with a temperature range of _9 ฑ 1 _C to _21 ฑ 0 _C during sample trial (i.e. since sample reached 0 to _18 _C). The freezer temperature increased to _9 ฑ 1 _C, as the freezer door was opened to place the experimental apparatus.