Pretreatment to increase yield and antioxidant activity of γ-oryzanol in rice bran oil

Duangkamol Ruen-Ngam, Chitti Thawai, Sujitra Sukonthamut
2016 ScienceAsia  
Six pretreatment processes to extract oil from Khao Dok Mali 105 rice bran were tested to assess the effect of the processes on the γ-oryzanol content and DPPH scavenging activity of the extract. The pretreatment processes consisted of the following: microwave heating (60-110°C), hot air heating (70-180°C), roasting (60-80°C), parboiling (70°C), autoclaving (121°C), and enzyme (amylase) treatment (50°C). The highest amount of oil was obtained by hot air heating (70°C) of 0.27 g/g of dried rice
more » ... g/g of dried rice bran, whereas the highest γ-oryzanol yield was obtained by parboiling 9.8 mg/g of dried rice bran. The highest γ-oryzanol concentration obtained with a roasting pretreatment (60°C) was 46.9 mg/ml of rice bran oil.
doi:10.2306/scienceasia1513-1874.2016.42.075 fatcat:xya2gad2lfdg7bivbparg5yzeq