Abstract
A simple and green approach was developed to extract the pepsin soluble collagen-II using the ultra-sonication treatment that significantly increased the extracted yield from chicken sternal cartilage (CSC). The pretreatment of raw CSC had positive effects on proximate composition. The maximum yield of pepsin soluble collagen was obtained by ultrasound treatment time 36min (UPSCII36; 3.37g) as compared to non-ultrasound treated pepsin soluble collagen at zero minutes (UPSCII0; 1.73g) (control). The amino acid profile, differential scanning calorimetry (DSC) of UPSC were significantly (p<0.05) improved by the application of ultrasound. The results showed the secondary structure of ultrasound treated PSC-II was partially altered as the ultra-sonication time prolonged. Moreover, ultrasound-treated collagen had superior functional properties such as water, oil absorption capacity, water holding capacity, foaming and emulsifying properties than non-ultrasound treated collagen. The poultry by-products CSC would be a potential source of land animal collagen-II. The utilization of ultrasound for the extraction of pepsin soluble collagen-II is a good alternative technology to expand the application of collagen at industrial level.
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