For flavonoids, it was possible to identify 5 flavonids (rutin, myricetin, quercetin, apigenin and kaempferol). In rice bran were only detected kaempferol, and rice husk and ground rice husk were only detected myricetin (Table 4). Decreases of kaempferol content in FIR (15%) and hot-air treated rice bran (17%) were observed, while it was not significantly affected by cellulase. For the rice husk and ground rice husk with different treatment, myricetin content decreased slightly, with losses of 9% and 7% in hot-air, 6% and 5% in FIR, and 1% in cellulase treatment, respectively. However, the
slight difference may be due to the thermal degradation of these