2.2. Description of process flowControl oat beta-glucan preparation was carried out according to the Harasym et al. (2011) procedure demonstrated on Fig. 1. Oat fiber (15 kg) was suspended in water/EtOH 40e60% solution in the ratio 1:6 (w/w) and heated for 1 h in 70e80 C with frame mixing as pre-treatment in a stirred batch tank reactor with heating mantle (ZM1 e 300 l, Obram Ltd).