Abstract
In this study, microbial transglutaminase (MTGase) and pectin were compared to modify bighead carp (Hypophthalmichthys nobilis) scale gelatin. The functional properties of modified fish scales gelatin (FSG) were largely improved, including melting temperature and rheological behavior. While, modification methods decreased the triple-helix content and destroyed the single left-hand helix chain of modified FSG as investigated by X-ray diffraction. MTGase could induce the denser and finer gels network, but had none significant effect on nanostructural properties of fish gelatin. Pectin inserted itself into the fish gelatin gels network and caused aggregations, forming crystalline peaks and various nanostructures. In particular, compared with pectin modified FSG, MTGase produced FSG with lower storage modulus and apparent viscosity, but higher gel points and melting points.
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Acknowledgements
This study was supported by the Collaborative Innovation Center for Major Ecological Security Issue of Jiangxi Province and Monitoring Implementation (JXS-EW-00), Earmarked fund for Jiangxi Agriculture Research System (JXARS-04), Science and technology of Jiangxi Province (No. 20142BBF60009), and National Natural Science of Foundation of China (No. 31660487).
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Huang, T., Tu, ZC., Wang, H. et al. Comparison of rheological behaviors and nanostructure of bighead carp scales gelatin modified by different modification methods. J Food Sci Technol 54, 1256–1265 (2017). https://doi.org/10.1007/s13197-017-2511-1
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DOI: https://doi.org/10.1007/s13197-017-2511-1