(P>0.05) for cooked brown rice both before and after
drying. The decrease of fat content was found to be
significant (P≤0.05) after drying. This might be related
to the rate of the food temperature change because it
dried quicker and the fact that the concentrated lipids
were removed during the drying. Normally, free lipids
in cereal grains are adsorbed to the surface of starch
granules (Kitahara et al., 1994) where they could
take off lipids. In addition, the microwave energy
increased the temperature of the rice and led to water
evaporation. Therefore, the content of free fatty acid
was reduced. These changes were similar to Zhao et
al., (2007).