Oxidation of lipid and protein in horse mackerel (Trachurus trachurus) mince and washed minces during processing and storage

Sylvie Eymard, Caroline Baron, Charlotte Jacobsen

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Protein and lipid oxidation was followed during processing and storage of mince and washed minces prepared from horse mackerel (Trachurus trachunts). Briefly horse mackerel mince (MO) was washed with three volumes of water, mimicking the surimi production and different washed products were obtained: M1, M2 and M3, with one, two and three washing steps, respectively. The different products were characterised (i.e. lipid content, protein, water, iron, fatty acid profile and tocopherol content) and analysed for protein and lipid oxidation in order to investigate the impact of the washing steps on oxidation. Subsequently the different products were stored for up to 96 h at 5 degrees C and samples were taken out regularly for analysis. Lipid oxidation was investigated by measuring primary oxidation products (lipid hydroperoxides) and secondary oxidation products (volatiles). Protein oxidation was followed by determination of protein solubility, protein thiol groups and protein carbonyl groups using colorimetric methods as well as western blotting for protein carbonyl groups. Lipid and protein oxidation markers indicated that both lipid and protein oxidation took place during processing and the ranking for oxidation was as follows M0 <M1 <M2 M2 >= M3. Lipid and protein oxidation developed simultaneously in different minces during storage, but it was not possible to determine at which level these two reactions were coupled.
Original languageEnglish
JournalFood Chemistry
Volume114
Issue number1
Pages (from-to)57-65
ISSN0308-8146
DOIs
Publication statusPublished - 2009

Keywords

  • Washed fish mince
  • Omega-3
  • Lipid oxidation
  • Surimi
  • Protein oxidation

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