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Thickness (a) and mechanical properties (elongation at break (b), tensile strength (c), and Young’s modulus (d) of potato starch-based films different SFO amounts (0, 10, 15 and 20% w/w related to starch dry weight) in the absence and presence of KOH (10% w/w related to the SFO weight). Different lowercase letters represent significantly different values (p < 0.05).
