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Abstract

Objective:To improve the extraction rate and product purity of Chinese soft-shelled turtle (pelodiscussinensis)dorsal collagen. Methods:The decalcification rate and collagen recovery rate were used as evaluation indicators to investigate the effects of hydrochloric acid concentration, decalcification time, decalcification temperature and solid-liquid ratio on the decalcification of the carapace of Chinese soft-shelled turtle. The removal process of calcium salts was optimized, and the structural changes of decalcified and non-decalcified turtle carapace collagen were analyzed by SDS-PAGE, ultraviolet absorption spectroscopy, infrared absorption spectroscopy, amino acid analysis and other techniques under the same extraction conditions. Results:The optimal decalcification process conditions were hydrochloric acid concentration of 0.8 mol/L, decalcification time of 2 h, decalcification temperature of 28 ℃, and solid-liquid ratio of 1∶25 (g/mL). Under these conditions, the decalcification rate and collagen recovery rate were (67.35±0.92)% and (90.77±1.08)%, respectively. The collagen content and extraction rate per unit mass of soft-shelled turtle carapace were significantly increased (P<0.05) after decalcification with hydrochloric acid, but the structural characteristics of collagen did not change significantly. Conclusion:Hydrochloric acid has a good decalcification effect on the decalcification of turtle carapace, and has no effect on the structural properties of its collagen.

Publication Date

11-23-2022

First Page

151

Last Page

157

DOI

10.13652/j.spjx.1003.5788.2022.90219

References

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