Abstract

Proton transverse relaxation has been measured in heated, pressure-treated, and frozen stored cod by pulse low-resolution NMR spectroscopy. These treatments resulted in the appearance of an additional component in the proton transverse relaxation which can be explained in terms of water exudation. The transverse relaxation time associated with this supplemental component increased with the temperature of the thermal treatment or with the temperature and duration of the frozen storage. For cod, these variations in NMR relaxation parameters can be used to detect nonreversible deterioration due to frozen storage or high hydrostatic pressure treatment.

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