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Title: Effect of high-pressure processing of Atlantic mackerel (Scomber scombrus) on biochemical changes during commercial frozen storage
Authors: Pazos, M.
Méndez, L.
Fidalgo, Liliana G.
Vázquez, M.
Torres, J.A.
Aubourg, S.P.
Saraiva, J.A.
Keywords: Scomber scombrus
High-pressure processing
Frozen storage
Issue Date: 2015
Publisher: Elsevier
Citation: Pazos, M., Méndez, L., Fidalgo, L., Vázquez, M., Torres, J., Aubourg, S. & Saraiva, J. (2015). Effect of high-pressure processing of Atlantic mackerel (Scomber scombrus) on biochemical changes during commercial frozen storage. Food and Bioprocess Technology, 8, 2159–2170.
Abstract: This research focuses on biochemical changes related to quality losses observed in Atlantic mackerel (Scomber scombrus) muscle stored under commercial frozen storage conditions (9 months, −18 °C) when subjected to highhydrostatic pressure (HHP) treatments (125, 150, 175, and 200 MPa for 0 min) before freezing. After freezing, free fatty acid (FFA) formation (lipid hydrolysis assessment) showed a marked inhibition in HHP-treated fish and during frozen storage of samples treated at 175 MPa. Fluorescence ratio (FR) assessment of tertiary lipid oxidation showed a partial inhibitory effect during the 0–9-month period for samples treated at 175 and 200 MPa. After a 3-month storage of samples treated at these pressure levels, one-dimensional SDS-PAGE analysis of the sarcoplasmic protein fraction revealed the disappearance of a band; additionally, samples treated at 150 MPa showed the same effect at month 9. After gel excision, trypsin digestion, tandem mass spectrometry (MS/MS), and sequence database analysis, the band was identified as phosphoglycerate mutase 2 (28.7 kDa). On the other hand, HHP processing did not show a significant effect on trimethylamine (TMA) values, primary and secondary lipid oxidation, PUFA levels, 1-D myofibril protein pattern, and the activity of acid phosphatase and cathepsins B and D. Biochemical quality indices such as FFA, TMA, and FR and the activity of acid phosphatase and cathepsin B showed a progressive increase throughout the frozen storage of all samples.
Peer reviewed: yes
ISSN: 1935-5130
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Appears in Collections:D-TCA - Artigos em revistas indexadas à WoS/Scopus

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