MP-LRS3 behaved a relative smooth surface, indicating
the rapid heating effect on starch caused by microwave during
gelatinization, amylose could not absolutely outflow from starch
granule, which would reduce the appropriate numbers of amylose
for RS formation. Cavities (Blue arrows in Fig. 2) were observed on
the rough surfaces of UP-LRS3, which could be attributed to the cavitation
of the ultrasonic.