Journal
FOOD CHEMISTRY
Volume 377, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2021.131949
Keywords
Ultrasound-assisted immersion freezing; Ice crystal nucleation; Frozen quality; Protein oxidation; Myofibrillar protein
Funding
- National Key Research and Development Program of China [2019YFD0901605]
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Immersion freezing and ultrasound-assisted immersion freezing significantly improved the freezing rate of Sciaenops ocellatus, reducing freezing time by over 83% compared to air freezing. Using ultrasound during freezing can accelerate the process and maintain muscle quality of the fish.
Freezing is a method that plays a key role in the storage of aquatic products. The effects of different methods of freezing on the quality, microstructure, ice-crystal morphology, and protein oxidation of Sciaenops ocellatus were investigated. Air freezing (AF), immersion freezing (IF), and different powers of ultrasound-assisted immersion freezing (UIF) (150, 200, and 250 W) were studied. IF and UIF significantly improved the freezing rate of S. ocellatus and shortened the freezing time by more than 83% compared with AF. The freezing rate achieved using UIF (200 W) was 712.81% higher than that achieved using AF. Oxidative denaturation of the myofibrillar protein was reduced after 90 days of frozen storage. Moreover, frozen samples in the UIF-200 W group had higher protein stability compared with that in the other groups. Therefore, appropriate ultrasonic power (200 W) during freezing can accelerate the freezing process of S. ocellatus and maintain its muscle quality.
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