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:: Volume 12, Issue 2 (4-2013) ::
IJFS 2013, 12 Back to browse issues page
Effects of frozen storage on fatty acids profile, chemical quality indices and sensory properties of Red Tilapia (Oreochromis niloticus × Tilapia mosambicus) fillets
B. Karami * , Y. Moradi , A. A. Motallebi , E. Hosseini , M. Soltani
, B. karami1981@gmail.com
Abstract:   (6453 Views)
The aim of the investigation was to determine the changes in fatty acids profile and chemical quality indexes of Red Tilapia fillets during frozen storage at -18°C. The fish were filleted by hand. The prepared fillets were then placed to the polyamide pouches and stored at -18°C for 150 days. Fatty acid profile, sensory properties and chemical quality indices were determined for a five month period. Results showed that 29 fatty acids were identified in the fresh and frozen samples. Polyunsaturated fatty acids (PUFA) were found higher than saturated fatty acids (SFA) in fresh samples but after 150 days of frozen storage this ratio became reverse. Oleic acid and Linoleic acid were the major MUFA (mono unsaturated fatty acids) and PUFA in fresh and frozen samples, respectively. The ratio of n3/n6 decreased from 0.59 to 0.49. The thiobarbituric acid value (TBA. Mg malondialdehyde/kg) increased significantly (p<0.05) throughout the storage time from 0.03 to 1.26 . Peroxide value (PV), Total volatile bases (TVB-N) and pH value also increased but were well within the limit of acceptability
Keywords: Frozen storage, Fatty acids profile, Sensory evaluation, Tilapia
Full-Text [PDF 373 kb]   (2995 Downloads)    
Type of Study: Orginal research papers | Subject: Fish processing
Received: 2013/05/13 | Accepted: 2013/06/3 | Published: 2013/06/3
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Karami B, Moradi Y, Motallebi A A, Hosseini E, Soltani M. Effects of frozen storage on fatty acids profile, chemical quality indices and sensory properties of Red Tilapia (Oreochromis niloticus × Tilapia mosambicus) fillets . IJFS. 2013; 12 (2) :378-388
URL: http://jifro.ir/article-1-996-en.html


Volume 12, Issue 2 (4-2013) Back to browse issues page
مجله علوم شیلاتی ایران Iranian Journal of Fisheries Sciences
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