4.7 Article

Effect of water, fat, and salt contents on heating uniformity and color of ground beef subjected to radio frequency thawing process

Journal

Publisher

ELSEVIER SCI LTD
DOI: 10.1016/j.ifset.2021.102604

Keywords

Color; Comminuted meat; Composition; RF; Temperature distribution

Funding

  1. National Key Research and Development Program of China [2016YFD0401000, 2018YFD0700105]
  2. General Program of National Natural Science Foundation of China [31772031]
  3. Key Research and Development Program in Shaanxi Province of China [2020NY124]
  4. Science and Technology Project of Yangling [2018NY20]
  5. PhD Research Startup Foundation of Northwest AF University [2452018003]

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The study found that added water had a negative impact on the RF heating uniformity but a positive impact on beef color; fat had a major negative effect on the RF heating uniformity but a positive impact on the lightness of the beef sample; high salt content had a positive influence on the RF heating uniformity but a significant negative effect on L* value of beef samples.
The comminuted meat products are popular and important in the global market. Radio frequency (RF) heating has been proposed as a new alternative method for thawing bulk frozen comminuted meat products with the main advantages of rapid and volumetric heating. However, the temperature non-uniformity is the main obstacle for its industrial applications. In the present study, effects of the level of added water (15?25%), fat (15?25%) and salt (0.1?1.0%) on the heating uniformity and color of ground beef were investigated using a 6 kW 27.12 MHz RF system during thawing process. The results showed that added water had a negative impact on the RF heating uniformity, and a positive impact on beef color. Fat had a major negative effect on the RF heating uniformity and a positive impact on the lightness of the beef sample. The high salt content had a positive in-fluence on the RF heating uniformity, and a significant negative effect on L* value of beef samples. The results may provide some potential methods to improve the RF heating uniformity and quality of food during RF thawing processing.

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