through alkaline extraction (alkaline-extracted SDF, a-SDF) and ultrasound-assisted alkaline
extraction (ultrasound-treated SDF, u-SDF) processes, and the composition, structure and
properties of the extracts were compared. The optimal parameters for obtaining the
maximum extraction yield of u-SDF were evaluated through response surface methodology.
Under optimal conditions, the maximum yield of u-SDF was 36.99%, and u-SDF had a lower …