even did not cause the nucleation to occur. In addition to this, the delays were long from Fig. 5b. This was attributed to the fact that levels of intensity for 3 s duration were not strong enough to induce nucleation. Moreover, when the ultrasound irradiation was 15 s, the nucleation temperature was close to the control sample at the relatively higher ultrasound irradiation intensities (0.26 and 0.37 W cm-2 ). At the same time, the delays were also very long from Fig. 5b. This was because levels of intensity for 15 s duration were strong enough to generate too much heat which disrupted and postponed the nucleation.