Effect of Temperature on Quality-Related Changes in Cod (Gadus morhua) During Short- and Long-Term Frozen Storage |
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Authors: | Maria G Burgaard Bo M Jørgensen |
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Institution: | 1. National Institute of Aquatic Resources, Technical University of Denmark , Kongens Lyngby, Denmark mgb@aqua.dtu.dk;3. National Institute of Aquatic Resources, Technical University of Denmark , Kongens Lyngby, Denmark |
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Abstract: | Cod (Gadus morhua) was stored at eight temperatures (?10 to ?80°C) for 1 to 18 months, after which quality indicators were measured—including drip loss, water holding capacity, low field NMR spin-spin relaxation, color, amount of thiobarbituric acid reactive substances, and sarcoplasmic reticulum Ca2+-ATPase and lysosomal Cathepsin D activities. Results from samples stored up to 12 months showed no significant differences between ?30°C and lower temperatures. The NMR measurements, however, indicated some changes in the water distribution of samples stored at ?30°C for 12 or more months compared to storage at ?40°C or lower. |
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Keywords: | freezing fish quality indicators ULF |
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