2.5.1.1. Selection of solvent type. By fixing extraction time (10 min) and extraction temperature (50 C), samples were extracted with 60% (v/v) acetone, 60% (v/v) ethanol, and 60% (v/v) methanol
respectively. The extraction procedure was described in Section 2.3. The solvent type was selected according to the value of extracted oligosaccharides (g/100 g FW).