The swelling power shows
the degree of the water absorption of the starch granules in the
flour (Carcea and Acquistucci, 1997). There were significant
differences (P < 0.05) in swelling power among composite
flours and wheat flour. The swelling power of composite flours
irrespective of the ratio of sweet potato flour and maize starch.
At the same amount of soybean flour in the composite flour,
there were no significant differences in swelling power. The
increasing of soybean flour amount will decrease the swelling
power in composite flour