Biochemical and physicochemical analysis of fish protein isolate recovered from red snapper (Lutjanus sp.) by-product using isoelectric solubilization/precipitation method

Asean-Fen International Fisheries Symposium - 2017

Pramono, H.^1 ; Pujiastuti, D.Y.^1 ; Sahidu, A.M.^1

Department of Marine, Faculty of Fisheries and Marine, Universitas Airlangga, Surabaya, Indonesia^1

关键词: Effect of acids;    Isoelectric solubilization/precipitation;    Overall quality;    Physico-chemical analysis;    Physicochemical characteristics;    Protein isolates;    Total volatile basic nitrogens;    Water holding capacity;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/137/1/012061/pdf
DOI  :  10.1088/1755-1315/137/1/012061

来源: IOP

【 摘 要 】

The effect of acid- and alkali-process on biochemical and physicochemical characteristics of fish protein isolate from red snapper (Lutjanus sp) by-product was evaluated. Protein recovered by alkali process (16.79%) was higher compared to acid process (13.75%). Reduction of lipid content and total volatile basic nitrogen (TVB-N) exhibited in both treatments indicated both process improved fish protein isolate recovered from red snapper by-product. In addition, the increasing of water holding capacity and oil binding capacity were observed. However, high peroxide value of fish protein isolate was showed in both treatment. This finding indicated that acid and alkali process can be used as a useful method to recover proteins from red snapper by-product. Alkali process gave a protein isolate with better overall quality compared to acid process.