shows the shape and surface characteristics of starch granules obtained fromuntreated and HMT-treated cassava flour. The morphology of untreated cassava flour revealed thatits starch granules were spherical and dome-shaped, with a size ranging from 9 to 20 µm, and somegranules were partially shattered and collapsed. In addition, some starch granules were connectedto and trapped in a fibrous matrix. Some of the granules were partially shattered and collapsed. TheHMTdid not change the size and shape of starch granules. However, the treated flour exhibited somegranules with sizable holes. Similar results were reported by Xiao et al. [8], buckwheat flours havemore holes and cavities on their surface after HMT. Moreover, the morphology of HMT cassava floursoaked with an ethanol solution did not differ from that soaked with water.