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Lipid Peroxidation and Chemical Changes in Catfish ( lctalurus puncfatus ) Muscle Microsomes during Frozen Storage
Author(s) -
EUN JONGBANG,
BOYLE JOHN A.,
HEARNSBERGER JAMES O.
Publication year - 1994
Publication title -
journal of food science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.772
H-Index - 150
eISSN - 1750-3841
pISSN - 0022-1147
DOI - 10.1111/j.1365-2621.1994.tb06941.x
Subject(s) - catfish , microsome , lipid peroxidation , chemistry , food science , peroxidase , biochemistry , fish <actinopterygii> , enzyme , fishery , biology
An NADH‐dependent lipid peroxidation system previously identified in channel catfish muscle microsomes functioned at −10° in isolated microsomes. Below that, activity was inhibited. The amount of peroxidase activity remaining after thawing previously frozen isolated microsomes or intact catfish fillets was inversely related to storage temperature. Microsome yield and lipid content were lower in the fillets stored at ‐ 10° than ‐40°. Most microsomal fatty acids, especially PUFAs, gradually decreased in the fish fillets stored at ‐10°. Prolonged storage of catfish fillets would require storage below ‐20°. Any thawing would result in reactivation of the peroxidase system.