Chemical modification and structural analysis of protein isolates to produce hydrogel using Whitemouth croaker (Micropogonias furnieri) wastes |
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Authors: | Martins Vilásia Guimarães Costa Jorge Alberto Vieira Damodaran Srinivasan Prentice Carlos |
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Institution: | (1) Laboratory of Food Technology, School of Chemistry and Food, Federal University of Rio Grande, Rio Grande, RS, Brazil;(2) Laboratory of Biochemical Engineering, School of Chemistry and Food, Federal University of Rio Grande, Rio Grande, RS, Brazil;(3) Department of Food Science, University of Wisconsin-Madison, 1605 Linden Drive, Madison, WI 53706, USA; |
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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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