期刊
JOURNAL OF FOOD ENGINEERING
卷 215, 期 -, 页码 104-112出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jfoodeng.2017.07.011
关键词
Grass carp; Ctenopharyngodon idellus; Free water; Bound water; Immobilized water; Low field nuclear magnetic resonance (LF-NMR)
资金
- Earmarked Funds for China Agriculture Research System [CARS-46]
- National Natural Science Foundation of China [31471683]
- National Science and Technology Ministry of China [2015BAD17B03]
- Tianjin Project of Transformation and Extension of Agricultural Science and Technology Achievements [201404020]
Low Field Nuclear Magnetic Resonance (LF-NMR) was used to evaluate the water mobility in grass carp during super-chilled storage. Grass carps were analyzed for inosine monophosphate (IMP), total viable counts, cooking loss, drip loss, biogenic amines, and sensory. Pearson's regression analysis between LF-NMR parameters and quality indicators was done to assess the feasibility of using LF-NMR to predict fish quality. Three water populations, T-2b (< 10 ms), T-21 (20 ms-80 ms), and T-22 (> 100 ms), were measured. The major component T-21, immobilized water, shifted to longer relaxation time with added salt and sugar due to the swelling of myofibers (P < 0.05). T-21 of cooked (85 degrees C) flesh was lowered, indicating that immobilized water mobility decreased during heating. Curing treatments predominately accelerated IMP formation, inhibited bacterial growth, retarded cooking loss, and improved the overall sensory quality. The study also showed that the LF-NMR was capable of monitoring unsalted fish deterioration. (c) 2017 Elsevier Ltd. All rights reserved.
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