4.7 Article

Comparative freezing study of broccoli and cauliflower: Effects of electrostatic field and static magnetic field

Journal

FOOD CHEMISTRY
Volume 397, Issue -, Pages -

Publisher

ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2022.133751

Keywords

Electrostatic field; Static magnetic field; Broccoli and cauliflower; Freezing

Funding

  1. Key R&D projects of Xinjiang Uygur Autonomous Region of China [2020B02017-1]
  2. National Key R&D Program of China [2017YFD0400501]
  3. 111 Project [BP0719028]
  4. Jiangsu Province (China) Collaborative Innovation Center for Food Safety and Quality Control Industry Development Program
  5. Jiangsu Province Key Laboratory Project of Advanced Food Manufacturing Equipment and Technology [FMZ202003]
  6. Postgraduate Research & Practice Innovation Program of Jiangsu Province [KYCX22_2387]

Ask authors/readers for more resources

The effects of electrostatic field and static magnetic field on the quality of frozen broccoli and cauliflower were studied. It was found that the electrostatic field treatment at 3 kV/cm had the best overall effect, significantly reducing drip loss and improving the integrity of cells and the content of ascorbic acid. The magnetic field treatment was less effective compared to the electrostatic field treatment.
The effects of 1, 3, 5 kV/cm electrostatic field (EF) and 2, 5, 8 mT static magnetic field (MF) on the quality of frozen broccoli and cauliflower (B and C) were studied. The freezing parameters were significantly improved by 3, 5 kV/cm EF or 8 mT MF treatment (P < 0.05), a maximum reduction of nucleation time and phase transition time by 20.14 % and 32.09 % was found in 5 kV/cm EF treated cauliflower. EF or MF treatment improved sample quality to some extent, the overall effect of 3 kV/cm EF was the best, which led to a maximum drip loss reduction of 64.3 % in cauliflower, accompanied by lower relative conductivity, higher ascorbic acid and less cell rupture. EF or MF did not significantly reduce the damage of the flavor. MF was less effective than EF in improving the quality of frozen B and C.

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