Journal
FOOD SCIENCE AND BIOTECHNOLOGY
Volume 26, Issue 4, Pages 937-945Publisher
KOREAN SOCIETY FOOD SCIENCE & TECHNOLOGY-KOSFOST
DOI: 10.1007/s10068-017-0125-z
Keywords
Tuna; Modified atmosphere packaging; Vacuum packaging; Whey protein isolates; Moisture
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Funding
- National Key Research and Development Program [2016YFD0400106]
- Shanghai Science and Technology Key Project on Agriculture from Shanghai Municipal Agricultural Commission [(2016) 1-1]
- Shanghai Municipal Science and technology project to enhance the capabilities of the platform [16DZ2280300]
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To improve the quality of modified atmosphere (60% CO2/15% O-2/25% N-2)-packaged or vacuum-packaged bigeye tuna (Thunnus obesus) chunks, an edible film containing whey protein isolates (WPI) were added. During storage at 2 A degrees C, the samples coated with WPI prior to packaging exhibited slower microbial growth, thiobarbituric acid (TBA), and total volatile basic-nitrogen (TVB-N) values than did those without films. On comparing the two formulations of WPI with 4 and 8% (v/v) glycerol, it was observed that WPI containing 8% glycerol induced more severe weight loss but retarded the lipid oxidation more effectively. The usage of WPI films with 8% glycerol is proved to be helpful to enhance the effect of modified atmosphere packaging on the quality of tuna, as the samples (MAP-2) displayed the lowest bacterial counts (3.63 log CFU/g) and TBA (0.349 mg malondialdehyde (MDA)/kg) and TVB-N (12.94 mg N/100 g) contents.
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