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Turkish Journal of Fisheries and Aquatic Sciences 2017, Vol 17, Num, 6     (Pages: 1117-1125)

Physicochemical Characterization of Gelatin Extracted from European Perch (Perca fluviatilis) and Volga Pikeperch (Sander volgensis) Skins

Cao Thi Hue 1-2 ,Nguyen Thi Minh Hang 1 ,Razumovskaya R.G. 3

1 Institute of Marine Biochemistry, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam
2 Thuy Loi University, 175 Tay Son, Dong Da, Hanoi, Vietnam
3 Astrakhan State Technical University, Astrakhan 414025, Russia
DOI : 10.4194/1303-2712-v17_6_05 Viewed : 438 - Downloaded : 592 The main purpose of this study was to extract and characterize gelatin from skins of fishes: European perch (Perca fluviatilis) and Volga pikeperch (Sander volgensis), which were collected from the Volga-Caspian basin in Russia. The gelatins were prepared using an alkaline pretreatment. The gelatin yield was in the range of 10.2-13.8% on a wet weight basis, and the gel strength exceeded 184 and 193 g for samples from European perch and Volga pikeperch skins, respectively. The pH values of gelatins were 5.49 and 5.73, melting points were 24.5 and 25.5oC and protein content was 88.6 and 91.0%, respectively. Water-holding and fat-binding capacities of gelatins were 227-235 and 439-453%, respectively. The gelatins were composed of α-chains, β-chains, and γ-chains. The apparent valine content of the two gelatins was significantly higher than those of gelatins from other fish species. The total apparent proportions of imino acids were 192 and 203 residues/1000 residues. The gelatins from European perch and Volga pikeperch skins had relatively high gel strengths, melting points, water-holding and fat-binding capacities as compared with those of other types of fish and could be recommended as potential replacements for mammalian gelatin in the food industry. Keywords : European perch, Perca fluviatilis, Volga pikeperch, Sander volgensis, skins, gelatin