Blending of soybean oil with selected vegetable oils: impact on oxidative stability and radical scavenging activity.
BACKGROUND
Soybean oil may protect against cancer of the breast and prostate. It may also exert beneficial influence in combination with other oils. Here, blends (20%, v/v) of sea buckthorn oil (SEBO), camellia oil (CAO), rice bran oil (RBO), sesame oil (SEO) and peanut oil (PEO) with soybean oil (SBO) were formulated.


METHODS
Oxidative stability (OS) and radical scavenging activity (RSA) of SBO and blends stored under oxidative conditions (60°C) for 24 days were studied. By blending with different kinds oils, levels of polyunsaturated fatty acids (PUFA) decreased, while monounsaturated fatty acid (MUFA) content increased. Progression of oxidation was followed by measuring peroxide value (PV), p-anisidine (PAV), conjugated dienes (CD) and conjugated trienes (CT).


RESULTS
Inverse relationships were noted between PV and OS at termination of storage. Levels of CD and CT in SBO, and blends, increased with increase in time. The impact of SEO as additives on SBO oxidation was the strongest followed by RBO, CAO, SEBO and PNO.


CONCLUSIONS
Oxidative stability of oil blends was better than SBO, most likely as a consequence of changes in fatty acids and tocopherols' profile, and minor bioactive lipids found in selected oils. The results suggest that these oil blends could contribute as sources of important antioxidant related to the prevention of chronic diseases associated to oxidative stress, such as in cancer and coronary artery disease.
Department of Food Science, Northeast Agricultural University, Harbin, Heilongjiang, China E-mail : jlzname@yeah.net.
Yang
Y
Li
Wen-Jun
WJ
Ma
Bao-Kun
BK
Qi
Sami
S
Rokayya
Dan
D
Li
Jing
J
Wang
Hong-Xia
HX
Feng
Xiao-Nan
XN
Sui
Lian-Zhou
LZ
Jiang
D000975:Antioxidants / Q000494:pharmacology*; D004338:Drug Combinations; D016166:Free Radical Scavengers / Q000494:pharmacology*; D010084:Oxidation-Reduction / Q000187:drug effects*; D010938:Plant Oils / Q000494:pharmacology*; D013024:Soybean Oil / Q000494:pharmacology*
D000975:Antioxidants; D004338:Drug Combinations; D016166:Free Radical Scavengers; D010938:Plant Oils; D013024:Soybean Oil