Volume 12, Issue 2 (2010)                   JAST 2010, 12(2): 167-172 | Back to browse issues page

‎ 20.1001.1.16807073.2010.12.2.9.7

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Derakhshan-Honarparvar M, Hamedi M M, Pirouzifard M K. Rice Bran Phytosterols of Three Widespread Iranian Cultivars. JAST 2010; 12 (2) :167-172
URL: http://jast.modares.ac.ir/article-23-8708-en.html
Rice Bran Phytosterols of Three Widespread Iranian Cultivars
M. Derakhshan-Honarparvar1 , M. M. Hamedi * 2, M. Kh. Pirouzifard1
1- Department of Food Science and Technology, College of Agriculture, University of Urmia, Urmia, Islamic Republic of Iran.
2- Department of Food Science and Engineering, Faculty of Biosystem, University of Tehran, Karaj, Islamic Republic of Iran.
Abstract:   (6083 Views)
Rice bran sterols have antioxidant activity as well as physiological and biological effects. Because of these benefits, the aim of this study is evaluating the quantity and quality of Iranian rice bran sterols. Three widespread Iranian rice cultivars (Khazar, Hashemi, and Alikazemi) were used for determination of their sterol contents. Two methods of sample preparation were compared and the better one was used in this work. Rice bran samples were saponified directly after acid hydrolysis. Unsaponified materials were extracted, purified by solid phase extraction, silylated, and their sterol fractions determined by GC-MS. The sterol composition (in mg kg-1 bran) of three cultivars (Khazar, Alikazemi, and Hashemi) were 1,330.69, 1,279.95, 1,313.17 β-sitosterol; 747.52, 696.05, 756.8 campesterol; 112.8, 115.36, 114.24 Δ-5-avenasterol, 38.912, 33.08, 38.24 Δ-7-avenasterol; 8.05, 7.07, 7.56c holesterol; 4.20, 3.99, 4.23 brassicasterol; and 2,722.016, 2,706.176, 2,717.68 total sterols, respectively. The results showed that there were no significant differences between the individual and total sterol contents of these three cultivars (P> 0.05), except campesterol, β-sitosterol, and Δ-7-avenasterol. The highest and lowest sterols were ß-sitosterol and campesterol.
Keywords: Phytosterols, Plant sterols, Rice bran, Sterol content determination
Full-Text [PDF 115 kb]   (6681 Downloads)    
Subject: Food Science and Technology
Received: 2010/01/24 | Accepted: 2010/01/24 | Published: 2010/01/24
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