This study evaluated the effectiveness of black rice, millet and barley bran extracts against oxidative degradation of sunflower oil in frying, by determining the total antioxidant activity, total phenolic content, free fatty acid content, conjugated diene content and total polar content. It was reported that the total phenolic content rice bran was approximately three times higher than that of the millet bran extracts and five times higher than the results for barley bran extracts. The total antioxidant activity results for barley bran and rice bran extract (40.95 ± 0.07and 40.87 ± 0.04 Trolox equivalent μmol/g of bran, respectively) were two times higher than that of millet bran extract (17.16 ± 0.34 Trolox equivalent μmol/g of bran). The results of the effectiveness of the cereal bran extracts were significantly different (p<0.05). The free fatty acid content of the rice bran and propyl gallate enriched oil samples showed better results (2.02 ± 0.01% and 1.62 ± 0.00%) than millet, barley and control enriched oil samples (3.43 ±0.01%, 3.13±0.01% and 6.13 ± 0.01% respectively). In the same vein, conjugated diene content results from all the enriched oil samples indicated that the rice bran enriched oil sample had the least amount of secondary oxidized products compared to the other enriched oil samples. It can be concluded that rice bran extract can be used for frying without discarding or replenishing the oil.
Aladedunye A, Matthäus B, Przybylski R. Correction to: Carbon dioxide blanketing impedes the formation of 4-hydroxynonenal and acrylamide during frying. a novel procedure for hne quantification. European Journal of Lipid Science and Technology. 2011;916–23.
2.
Spectrophotometric determination of conjugated dienoic acid. Official Methods and Recommended Practices of the American Oil Chemists’ Society (AOCS). Scientia Iranica. 1998;(6):1402–6.
3.
Aydeniz B, Yilmaz E. Enrichment of frying oils with plant phenolic extracts to extend the usage life. European Journal of Lipid Science and Technology. 2012;(8):933–41.
4.
Aydeniz B, Yilmaz E. Performance of different natural antioxidant compounds in frying oil. Food Technology and Biotechnology. 2016;(1):21–30.
5.
Chen XW, Chen YJ, Wang JM, Guo J, Yin SW, Yang XQ. Phytosterol structured algae oil nanoemulsions and powders: Improving antioxidant and flavor properties. Food & function. 2016;(9):3694–702.
6.
Choe E, Min D. Comparison antioxidant activity of tarom mahali rice bran extracted from different extraction methods and its effect on canola oil stabilization. Journal of Food Science and Technology-mysore. 2007;(5):6385–94.
7.
Huang YP, Lai HM. Bioactive compounds and antioxidative activity of colored rice bran. Journal of Food and Drug Analysis. 2016;(3):564–74.
8.
Karakaya S, Simsek S, Lai P, Li K, Lu S, Chen H. Changes in total polar compounds, peroxide value, total phenols and antioxidant activity of various oils used in deep fat frying. Journal of the American Oil Chemists Society. 2011;(9):538–44.
9.
Lee J, Lee S, Lee H, Park K, Choe E. Spinach (spinacia oleracea) powder as a natural food-grade antioxidant in deep-fat-fried products. Journal of Agricultural and Food Chemistry. 2002;(20):5664–9.
10.
Madhujith T, Izydorczyk M, Shahidi F. Antioxidant properties of pearled barley fractions. Journal of Agricultural and Food Chemistry. 2006;(9):3283–9.
11.
Madhujith T, Shahidi F. Antioxidant potential of barley as affected by alkaline hydrolysis and release of insolublebound phenolics. Food Chemistry. 2009;(4):615–20.
12.
Masisi K, Beta T, Moghadasian M. Antioxidant properties of diverse cereal grains: A review on in vitro and in vivo studies. Food Chemistry. 2016;90–7.
13.
Moongngarm A, Daomukda N, Khumpika S. APCBEE Procedia. 3rd International Conference on Biotechnology and Food Science (ICBFS). 2012;73–9.
14.
Okubo T, Yokoyama Y, Kano K, Kano I. Cell death induced by the phenolic antioxidant tert-butylhydroquinone and its metabolite tert-butylquinone in human monocytic leukemia u937 cells. Food and Chemical Toxicology. 2003;(5):679–88.
15.
Pokorny J, Yanishlieva N, Gordon M. Antioxidants in food: Practical applications. 2001;
16.
Re R, Pellegrini N, Proteggente A, Pannala A, Yang M, Rice-Evans C. Antioxidant activity applying an improved abts radical cation decolorization assay. Free Radical Biology and Medicine. 1999;(9–10):1231–7.
17.
Rehman Z. Citrus peel extract-a natural source of antioxidant. Food Chemistry. 2006;(3):450–4.
18.
Shin S, Kim HW, Jang HH, Hwang YJ, Choe JS, Lim Y. Gamma-oryzanol-rich black rice bran extract enhances the innate immune response. Journal of Medicinal Food. 2017;20.
19.
Singleton V, Rossi A, J. Colorimetry of total phenolics with phosphomolybdic-phosphotungstic acid reagents. American Journal of Enology and Viticulture. 1965;(3):144–58.
20.
Sumnu S, Sahin S. Advances in deep-fat frying of foods. 2008;
21.
Taghvaei M, Jafari S. Application and stability of natural antioxidants in edible oils in order to substitute synthetic additives. Journal of Food Science and Technology-mysore. 2015;(3):1272–82.
22.
Thorat I, Jagtap D, Mohapatra D, Joshi D, Sutar R, Kapdi S. Antioxidants, their properties, uses in food products and their legal implications. International Journal of Food Studies. 2013;(1):81–104.
23.
Tompkins C, Perkins E. Frying performance of low-linolenic acid soybean oil. Journal of the American Oil Chemists Society. 2000;(3):223–9.
24.
Xu X. A new spectrophotometric method for the rapid assessment of deep frying oil quality. Journal of the American Oil Chemists Society. 2000;(10):1083–6.
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