PMID- 10552499 OWN - NLM STAT- MEDLINE DCOM- 20000818 LR - 20190723 IS - 0021-8561 (Print) IS - 0021-8561 (Linking) VI - 47 IP - 5 DP - 1999 May TI - Lipid oxidation in fillets of herring (Clupea harengus) during frozen storage. Influence of prefreezing storage. PG - 2075-81 AB - Fillets of herring (Clupea harengus) were kept on ice for 0, 3, 6, and 9 days prior to storage at -18 degrees C for 0, 21, 42, 63, and 84 days. At each storage point, peroxide value (PV), absorbance at 268 nm (A(268)), fluorescent products (FP), alpha-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 degrees C decreased with increased prefreezing holding time, the latter being most obvious for GSH-px activity and ascorbic acid. alpha-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, A(268), FP, alpha-tocopherol, and ascorbic acid. For GSH-px activity, frozen storage had the greatest effect. FAU - Undeland, I AU - Undeland I AD - SIK-The Swedish Institute for Food and Biotechnology, Goteborg. FAU - Lingnert, H AU - Lingnert H LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - J Agric Food Chem JT - Journal of agricultural and food chemistry JID - 0374755 RN - 0 (Dietary Fats) RN - 0 (Lipid Peroxides) RN - 1406-18-4 (Vitamin E) RN - EC 1.11.1.9 (Glutathione Peroxidase) RN - PQ6CK8PD0R (Ascorbic Acid) SB - IM MH - Animals MH - Ascorbic Acid/analysis MH - *Dietary Fats MH - Fishes MH - *Food Handling MH - Freezing MH - Glutathione Peroxidase/analysis MH - Lipid Peroxidation MH - Lipid Peroxides/*analysis MH - Meat/*analysis MH - Regression Analysis MH - Time Factors MH - Vitamin E/analysis EDAT- 1999/12/20 09:00 MHDA- 2000/08/29 11:01 CRDT- 1999/12/20 09:00 PHST- 1999/12/20 09:00 [pubmed] PHST- 2000/08/29 11:01 [medline] PHST- 1999/12/20 09:00 [entrez] AID - jf980944w [pii] AID - 10.1021/jf980944w [doi] PST - ppublish SO - J Agric Food Chem. 1999 May;47(5):2075-81. doi: 10.1021/jf980944w.