Journal
INTERNATIONAL JOURNAL OF REFRIGERATION
Volume 140, Issue -, Pages 49-56Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ijrefrig.2022.05.008
Keywords
Static magnetic field; Freezing; Channel catfish; Two freezing temperatures; Quality changes
Categories
Funding
- Na-tional Natural Science Foundation of China [51976232]
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This study investigates the effect of magnetic field on quality changes of frozen channel catfish under different freezing temperatures. The results show that the application of a static magnetic field can reduce the time spent at the maximum ice crystals formation stage, decrease weight loss, bring the pH value closer to fresh samples, and improve the hardness and chewiness properties of frozen fish.
The effect of magnetic field on quality changes of frozen channel catfish under two different freezing temperatures was investigated in this paper. During the freezing process of channel catfish under-18 ? and-40 ?, which represented slow freezing and fast freezing conditions, static magnetic field (SMF) intensities of 0, 1.7, 3.5, 7.0 and 10.7 mT were applied. The temperature was monitored during the freezing process, and parameters of weight loss, pH, and textural properties were measured and compared. The results show that for the freezing condition of-40 & DEG;C, the time spent at the maximum ice crystals formation stage was significantly reduced after the application of SMF. The total weight loss of SMF samples frozen at both freezing temperatures had a significant reduction. The pH was closer to the fresh samples after 7.0 -10.7 mT and 10.7 mT SMF intensities were applied to-18 & DEG;C and-40 ?, respectively. SMF had a beneficial effect on improving the hardness and chewiness properties of frozen fish, while it was only obvious at-18 ? freezing condition.
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