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http://dx.doi.org/10.14478/ace.2018.1064

Optimization of Extraction Conditions of Antioxidant Activity and Bioactive Compounds from Rice Bran by Response Surface Methodology  

Gam, Da Hye (Department of Food Science, Sunmoon University)
Jo, Jae Min (Department of Food Science, Sunmoon University)
Jung, Hyun Jin (Department of Food Science, Sunmoon University)
Kim, Jin Woo (Department of Food Science, Sunmoon University)
Publication Information
Applied Chemistry for Engineering / v.29, no.6, 2018 , pp. 726-733 More about this Journal
Abstract
The rice's waste byproduct is known as a rice bran and produced annually about 400,000 to 600,000 tons. Most of the rice bran are used as a livestock feed or waste disposal, and needed to be used to produce high-added substances, such as bioactive materials. In this study, extraction conditions of the ultrasound-assisted extraction (UAE) of the rice bran were optimized using a statistically-based optimization. The influence of extraction variables including the extraction time ($X_1$), extraction temperature ($X_2$) and ethanol concentration ($X_3$) were investigated using the response surface methodology in order to determine optimum extraction conditions which maximize total phenolic compounds (TPC), total flavonoid compounds (TFC) and electron donating abilities (EDA). The optimal UAE from rice bran was achieved under the extraction temperature of $94.9^{\circ}C$, extraction time of 41.6 minute and ethanol concentration of 74.0% (v/v) with maximum yields of TPC 2.78 mg GAE/g DM, TFC 1.63 mg QE/g DM and EDA 42.86%. The UAE process shows its potential to the extraction of bioactive and antioxidant compounds from rice bran in a short extraction time and low temperature. Also, it is proposed that rice bran could be considered as food additives and cosmeceutical products.
Keywords
Rice bran; Optimization; ultrasound-assisted extraction; Polyphenol; antioxidant;
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