significantly important. However, significant levels of interactions were found between Day*Power (Table 1b) and Power*Time (Table 1c). In contrast to 90 Wand CNT treatments, 30 Wand 60 W had the lower pH values of 3.56 and 3.61, respectively (Table 1b). FromthedatainTable1c,itcan be seen that there was a significant difference between 30 W and other treatments for 10 min. A possible explanation for this difference in pH values might be related to high CO2 levels inside 90 Wand CNT packages. High CO2 accumulation is an indicator of the high respiration and degradation rates of organic acids (Almenar et al., 2007; Holcroft & Kader, 1999; Zhao et al., 2007). These findings showed that 30 W and 60 W ultrasound treatments were effective in maintaining pH of strawberries during storage.