Different combinations of ultrasound and antioxidant treatments are listed in Table 1.
In each batch, suspensions of WWF were prepared by stirring 25 g of WWF and 250 mL of distilled water or antioxidant solution (1 g/100 g ascorbic acid or 0.5 g/100 g glutathione of WWF, w/w) in a 500 mL beaker.