tilapia skins (30 g) were soaked in tap water (ratio of skins to water is 1:6 w/v) for 10 min, drained on cheesecloth, and thenwashed twice (1:6 w/v) to remove the suspended residues.
tilapia skins (30 g) were soaked in tap water (ratio of skins to water is 1:6 w/v) for 10 min, drained on cheesecloth, and thenwashed twice (1:6 w/v) to remove the suspended residues.