FOOD SCIENCE ›› 2018, Vol. 39 ›› Issue (6): 51-56.doi: 10.7506/spkx1002-6630-201806009

• Food Chemistry • Previous Articles     Next Articles

Effect of Freeze-Thaw Cycles on Properties of Hen Egg White Proteins

BI Haidan1, CUI Xuhai1, YU Bin2,*, GUO Ying1   

  1. (1. College of Food Science and Pharmaceutical Engineering, Zaozhuang University, Zaozhuang 277160, China;2. College of Food Science and Engineering, Qilu University of Technology, Jinan 250353, China)
  • Online:2018-03-25 Published:2018-03-14

Abstract: The aim of this study was to investigate the effect of freeze-thaw cycles on functional and structural properties of egg white proteins (EWP). The functional, physicochemical, rheological properties and secondary structures of EWP subjected to different cycles of freeze-thaw were analyzed. The results showed that gelling and foaming properties of EWP were improved by appropriate freeze-thaw cycles. Freeze-thaw cycles resulted in the exposure of hydrophobic residues, protein unfolding and intermolecular aggregation. Moreover, dynamic rheological results revealed that the elastic and viscous modulus was strongly dependent on freeze-thaw cycles. Fourier transform infrared (FT-IR) spectra indicated that more β-sheet and random coil structures were formed with the decrease of α-helix and β-turn. The structure and properties of EWP could be changed by freeze-thaw cycles, which would be used in the processing of egg white.

Key words: freeze-thaw cycles, hen egg white, functional properties, rheological characteristics, secondary structure

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