Antioxidant Activity of the Alkali and Alcohol Soluble Extracts from the Defatted Rice Bran

doi:10.3969/j.issn.1673-1689.2016.01.005

Home > Archive>Volume 35, Issue 1, 2016 >35-41. DOI:10.3969/j.issn.1673-1689.2016.01.005

Antioxidant Activity of the Alkali and Alcohol Soluble Extracts from the Defatted Rice Bran
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                        10.3969/j.issn.1673-1689.2016.01.005
                    
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The alkali and alcohol soluble extracts from the defatted rice bran exhibit a good antioxidant activity in vitro. The antioxidant effects of the extracted antioxidants from the defatted rice bran on scavenging free radicals and lipid peroxides aganist oxidative damage system were studied by hydroxyl radical system，DPPH radical system，superoxide anion radical system，linoleic acid system，pure lard system，ORAC system，and PC12 cells，respectively. The scavenging rate of ·OH was over 50% for the extracts of 0.2 g/mL，while the clearance rate of DPPH was as high as 90% for 0.6 mg/mL extracts. The O2- clearance rate is about 50% for the extracts of 45.0 mg/mL and the ORAC value reached a comparable value with sodium D-isoascorbate when the extracts concentration was larger than 60 μg/mL，In linoleic acid system，a significant antioxidant activity was observed for the extracts of 500 μg/mL. At the meanwhile，the effect was better than sodium D-isoascorbate with same concentration for the extracts of 500 μg/mL and 1 mg/mL. In lard antioxidant studies，a longer duration was required for pov growing to the same level if the lard samples added with 5% extracts. The PC12 cell viability presented a successively increasing trend when the sample concentration increased，for example，the PC12 cell viability reached to 82.2% with 5 mg/mL sample added and the antioxidant effect was better than Trolox of 200 μmol/L.

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CUI Hongjun, XU Baocai, WANG Li, HAN Yanqing, LUO Xiaohu. Antioxidant Activity of the Alkali and Alcohol Soluble Extracts from the Defatted Rice Bran[J]. Journal of Food Science and Biotechnology,2016,35(1):35-41.

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Online: March 11,2016
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