Mean values and standard deviation (in brackets) of pasteurization units (PU) calculated at the coldest and the hottest spot of the kiwifruit puree under conventional and microwave (1000 and 900 W) heating. The same superscript letters in columns (x, y for coldest spot data and a, b, c for the hottest spot data) indicate homogeneous groups established by the ANOVA (p < 0.05) when the different treatments are compared.