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Lipid oxidation in fillets of herring (Clupea harengus) during frozen storage. Influence of pre-freezing storage.

Ingrid Undeland (Institutionen för kemi och biovetenskap, Livsmedelsvetenskap) ; Hans Lingnert
Journal of Agricultural and Food Chemistry (0021-8561). Vol. 47 (1999), 5, p. 2075-2081.
[Artikel, refereegranskad vetenskaplig]

Fillets of herring (Clupea harengus) were kept on ice for 0, 3, 6, and 9 days prior to storage at −18 °C for 0, 21, 42, 63, and 84 days. At each storage point, peroxide value (PV), absorbance at 268 nm (A268), fluorescent products (FP), α-tocopherol, glutathione peroxidase (GSH-px) activity, and ascorbic acid were measured. As shown by regression analyses, samples held for 6 days on ice formed oxidation products at the highest rate during frozen storage, followed by, for PV and FP, the 9-day samples. These data indicate that severe changes that negatively affect the oxidation process took place in the herring muscle between 3 and 6 days after catch. Both the initial antioxidant levels and the rate of antioxidant loss at −18 °C decreased with increased prefreezing holding time, the latter being most obvious for GSH-px activity and ascorbic acid. α-Tocopherol showed the largest losses and had disappeared entirely from the 6- and 9-day samples at the end of the frozen storage. Partial least-squares regression analysis of the data showed that ice storage had a greater effect than frozen storage on changes in PV, A268, FP, α-tocopherol, and ascorbic acid. For GSH-px activity, frozen storage had the greatest effect.

Nyckelord: Antioxidants; Clupea harengus; herring; ice storage; lipid oxidation



Denna post skapades 2015-04-19.
CPL Pubid: 215349

 

Institutioner (Chalmers)

Institutionen för kemi och biovetenskap, Livsmedelsvetenskap (1900-2004)

Ämnesområden

Biologiska vetenskaper
Lantbruksvetenskap, skogsbruk och fiske

Chalmers infrastruktur