Structural Changes in Marinated Fillets of Gilthead Sea Bream (Sparus aurata L.) during Vacuum Storage at Refrigerated Temperature

:  Fillets of Sparus aurata were marinated in a mixture of salt (5.5%) and citric acid (48.9 g/kg) for 1 h, then vacuum packed and refrigerated for 1, 5, 16, and 21 d. Structural and ultrastructural parameters were evaluated in 6 specimens per time period. At day 1, the preservative solution appeare...

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Bibliographic Details
Published in:Journal of food science 2011-05, Vol.76 (4), p.C626-C632
Main Authors: Ayala, María D., Gil, Francisco, Vázquez, José M., Latorre, Rafael, Ramírez, Gregorio, López, Octavio
Format: Article
Language:English
Subjects:
Animals
Biological and medical sciences
Cells
Citric acid
denatured proteins
Dietary fiber
Fibers
Fillets
Fish
Fish and seafood industries
Food industries
Food preservation
Food science
Food Storage - methods
Fundamental and applied biological sciences. Psychology
Granular materials
Hydrogen-Ion Concentration
Marinated
marinated fillets
Marine
Meat - analysis
Muscles
myofibrils
Myofibrils - chemistry
Myofibrils - ultrastructure
Organelles
Preservatives
Protein Denaturation - drug effects
Proteolysis
Refrigeration
Sarcolemma - metabolism
Sea Bream
Sparus
Vacuum
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Summary::  Fillets of Sparus aurata were marinated in a mixture of salt (5.5%) and citric acid (48.9 g/kg) for 1 h, then vacuum packed and refrigerated for 1, 5, 16, and 21 d. Structural and ultrastructural parameters were evaluated in 6 specimens per time period. At day 1, the preservative solution appeared among the muscle fibers, thus increasing the interfibrillar spaces; cytoplasmic organelles were swollen and the sarcolemma‐endomysium appeared very altered and electron‐dense. At 5 to 10 d, the marinade solution had penetrated into the muscle fibers. The subsarcolemmal and intermyofibrillar spaces were dilated and granular lines of electron‐dense material appeared among the fibers. From 16 d, broad interfibrillar spaces were occupied by granular material derived from denatured sarcolemma‐endomysium and denatured myofibrils. Sarcomeres were already altered from initial stages, mainly at the I‐band level. The Z‐line also appeared disrupted. Such alterations were more severe from 10 d on, such that most of the sarcomeres showed disintegration of myofilaments.
ISSN:0022-1147
1750-3841
DOI:10.1111/j.1750-3841.2011.02118.x