Changes in chemical composition and nutritional quality of fried sardine (Clupea pilchardus) produced by frozen storage and microwave reheating

✍ Scribed by Castrillón, Ana M; Navarro, Pilar; Alvárez-Pontes, Esther

• Publisher: John Wiley and Sons
• Year: 1997
• Tongue: English
• Weight: 222 KB
• Volume: 75
• Category: Article
• ISSN: 0022-5142
• DOI: 10.1002/(sici)1097-0010(199709)75:1<125::aid-jsfa852>3.0.co;2-f

✦ Synopsis

ModiÐcations in proximate composition, fatty acids, amino acids and ÈSH groups content, as well as changes in solubility and nutritional quality of protein, were studied in Ðllets of sardine (Clupea pilchardus) that had been successively pan-fried, frozen stored and reheated by two di †erent means, namely conventional oven and microwave oven. Upon pan-frying in olive oil the sardine absorbed C18 : 1(n-9) and C18 : 2(n-6) and lost saturated (SFA) and polyunsaturated fatty acids (PUFA) ; this loss continued upon reheating, and as a consequence the percentage of MUFA increased compared to the just-fried sardine. A loss of water was observed during all processes. Upon frying there was a decrease of cyst(e)ine. Upon reheating by both microwave and conventional oven, methionine decreased ; however, cyst(e)ine only decreased with the use of a conventional oven. A loss of ÈSH groups was recorded during frying and this phenomenon continued upon reheating. Biological value (BV) together with net protein utilisation (NPU) decreased upon both frying and reheating.