Comparative Study On The Gelation Behavior Of Grass Carp And Snakehead Skin Collagen During In Vitro Self-Assembly Process
Keywords
Freshwater Fish, Collagen, Self-Assembly, Gelation, Rheology
Abstract
Taking grass carp and snakehead skin collagen as the research object, turbidity experiments and rheology experiments were used to study the in vitro self-assembly behavior and gelation behavior of the two collagens. The results showed that the assembly turbidity curves and rheological viscoelastic curves of the two collagens showed a typical three-stage pattern, namely, nucleation stage, assembly stage and equilibrium stage. The nucleation time of collagen assembly measured by turbidity experiment is 13.5 min (Ctenophora carp PSC) and 3.5 min (Cowhead Snakehead PSC), and the equilibrium time is 72.6 min (Ctenophora carp PSC) and 10.0 min (Cowhead Snakehead PSC); while the collagen measured by rheology experiment The assembly nucleation time is 6.7 min (grass carp PSC) and 1.9 min (snakehead snakehead PSC), and the equilibrium time is 105 min (grass carp PSC) and 58.0 min (snakehead snakehead PSC). The nucleation time measured by rheological experiments is significantly shortened and the assembly time is significantly prolonged. Scanning electron microscopy fiber diameter analysis results show that the collagen fiber diameter continues to grow after the equilibrium time of the turbidity experiment until the equilibrium time of the rheology measurement, indicating that the rheological viscoelastic experiment can more sensitively and completely reflect the in vitro self-assembly of collagen. Behavior. Compared with grass carp skin collagen, snakehead collagen has a faster assembly rate and a stronger collagen gel, indicating that there are obvious differences in the in vitro self-assembly behavior of different types of collagen.
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Original research was done by Yang Huan, Yang Ling, Wang Haibo, Zhao Yan, Deng Mingxia, Lu Liang
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