Quality Evaluation of Fish Meat by 31 Phosphorus‐Nuclear Magnetic Resonance
- 1 May 1991
- journal article
- Published by Wiley in Journal of Food Science
- Vol. 56 (3), 660-664
- https://doi.org/10.1111/j.1365-2621.1991.tb05351.x
Abstract
31Phosphorus-Nuclear Magnetic Resonance (31P-NMR) was used to evaluate degree of freshness of loach muscle depending on metabolic changes of high energy phosphate compounds. The phosphocreatine ([PCr])/inorganic phosphate ([Pi]) ratio was found to be a sensitive index of early metabolic hypofunction. Ratios of [PCr]/β-phosphate of ATP ([β-ATP]), and [Pi]/[β-ATP] were demonstrated to be appropriate indexes to estimate such metabolic changes in fresh fish. The intramuscular levels of creatine phosphate, ATP and pH were maintained at higher levels in blood-drained loach than in untreated fish. The freshness of fish which were bled and washed at lower temperatures were better preserved.Keywords
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