African Journal of
Biotechnology

  • Abbreviation: Afr. J. Biotechnol.
  • Language: English
  • ISSN: 1684-5315
  • DOI: 10.5897/AJB
  • Start Year: 2002
  • Published Articles: 12278

Full Length Research Paper

Effects of pan frying with different oils on some of the chemical components, quality parameters and cholesterol levels of rainbow trout (Oncorhynchus mykiss)

Şengül Bilgin*, Levent İzci, Ali Günlü and Yıldız Bolat
Department of Fishing and Fish Processing Technology, Faculty of Egirdir Fisheries, Suleyman Demirel University, Egirdir-Isparta/Türkiye.
Email: [email protected], [email protected]

  •  Accepted: 23 August 2010
  •  Published: 27 September 2010

Abstract

The changes in chemical composition, cholesterol and fatty acids have been determined in raw and fried rainbow trout. Olive oil, sunflower oil, corn oil, margarine and butter were used in the frying process. Moisture content was decreased and protein, fat, ash and cholesterol contents were increased after frying. Differences in moisture, protein, fat, and ash content between the samples were significant (P < 0.05). pH, thiobarbituric acid (TBA), and total volatile basic nitrogen (TVB-N) values were within the limiting depletability values. In the fish fried with sunflower oil and corn oil, an important amount of decrease (P < 0.05) was determined for myristic, palmitic, palmitoleic, stearic, linolenic, arashidic, and docosahexaenoic acid (DHA). However, an important amount of increase (P < 0.05) was determined in heptadecanoic, oleic, and linoleic acid. DHA content was decreased in all oil groups. Cholesterol level was increased with the use of butter. The lowest level of cholesterol was observed in fish fried with margarine.

 

Key words: Rainbow trout, frying, fatty acid, cholesterol.

Abbreviation

PUFA, Polyunsaturated fatty acid; EPA, eicosapentaenoic acid;DHA, docosahexaenoic acid; TBA, thiobarbituric acid; TVB-N, total volatile basic nitrogen; C, fresh fish; SFO, sunflower oil; OO, fish fried in olive oil; CO, fish fried in corn oil; MO, fish fried in margarine; BO, fish fried in butter.