Volume 13, Issue 6 (2011)                   JAST 2011, 13(6): 855-868 | Back to browse issues page

‎ 20.1001.1.16807073.2011.13.6.9.2

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Haghparast S, Kashiri H, Alipour G, Shabanpour B. Evaluation of Green Tea (Camellia sinenses) Extract and Onion (Allium cepa L.) Juice Effects on Lipid Degradation and Sensory Acceptance of Persian Sturgeon (Acipenser persicus) Fillets: A Comparative Study. JAST 2011; 13 (6) :855-868
URL: http://jast.modares.ac.ir/article-23-9186-en.html
Evaluation of Green Tea (Camellia sinenses) Extract and Onion (Allium cepa L.) Juice Effects on Lipid Degradation and Sensory Acceptance of Persian Sturgeon (Acipenser persicus) Fillets: A Comparative Study
S. Haghparast * 1, H. Kashiri1 , Gh. Alipour1 , B. Shabanpour1
1- Department of Seafood Processing, Faculty of Fisheries, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Islamic Republic of Iran.
Abstract:   (6043 Views)
This study was carried out to evaluate the effects of red onion (Allium cepa L.) juice and green tea (Camellia sinenses) extract on lipid oxidation and sensory characteristics of refrigerated (4ºC) sturgeon fillets (Acipenser persicus). Fresh fillets were tumbled in 1%, 2.5%, and 5% (v/v) aqueous solutions of onion Juice (OJ) and tea extract (TE), and then stored for up to 8 days at 4°C in a refrigerator. Chemical indices of lipid oxidation as assayed by heme iron, thiobarbituric acid and free fatty acid contents indicated much more reduction in 2.5%TE, 5%TE and 5%OJ-treated samples relative to the other samples (P<0.05). Significant (P<0.05) differences in pH values of treatments and the control were observed during the first 2 days of storage time. For 5%OJ treatment, the pH remained constant during refrigerated storage (P>0.05) whereas gradual changes were detected in pH values of the others. Generally, the order of effectiveness for inhibiting oxidation in sturgeon fillets was found to be: 5% TE or OJ = 2.5% TE > 2.5 % OJ>1% TE = 1% OJ. Based on sensory scores, higher amounts of onion juice (>1%) were more effective to improve attributive characteristics of the fillets.
Keywords: Green tea, Lipid degradation onion, Sturgeon fillets
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Received: 2011/05/9 | Accepted: 2011/05/9 | Published: 2011/05/9
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