When increasing SS, it was found that the amylose content of samples extruded at higher FM (50%) decreased by 17.5–21.9%, while at lower FM (20%) there were no significant differences. In general, SS is responsible for the degree
to fill the barrel, which directly affects the residence time, and the rate of shear development on the material during extrusion cooking (Karunanithy & Muthukumarappan, 2012).