Abstract
Recovery and alteration of fish protein from wastes and its use has been regarded as a promising alternative to develop useful products once polymer gels have a high capacity of water uptake. This study aims to produce hydrogel, a super absorbent biopolymer from modified fish protein, in order to evaluate the protein structure. In the modified proteins, analyses of the extent of modification of the lysine residues, electrophoresis, and electrometric titration were performed. In the hydrogels were realized assays of swelling water. The proteins with more modifications were shown as 63.5% and 75.9% of lysine residues, from fish protein isolate obtained with alkaline and acid solubilization, respectively. The modified protein in that same rate presented 332.0 and 311.4 carboxyl groups. Accordingly, the hydrogel produced from alkaline and acid isolates reached a maximum water uptake in 24 h of 79.42 and 103.25 gwater/gdry gel, respectively.
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Authors wish to thank The Coordination for Improvement of Higher Education Personnel in Brazil (CAPES) and National Council for Scientific and Technological Development of Brazil (CNPq) for financial support to carry out experiments.
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Martins, V.G., Costa, J.A.V., Damodaran, S. et al. Chemical Modification and Structural Analysis of Protein Isolates to Produce Hydrogel using Whitemouth Croaker (Micropogonias furnieri) Wastes. Appl Biochem Biotechnol 165, 279–289 (2011). https://doi.org/10.1007/s12010-011-9250-y
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DOI: https://doi.org/10.1007/s12010-011-9250-y