Department of Agro-Industry, Naresuan University, 99 Moo 9, Tha Pho, Phitsanulok 65000, Thailand.
Central Laboratory (Thailand) Co., Ltd., 164/86 Moo 3, Donkaew, Maerim, Chiangmai 50180, Thailand.
J Food Drug Anal. 2019 Jan;27(1):71-82. doi: 10.1016/j.jfda.2018.06.006. Epub 2018 Jul 2.
Rice bran oil (RBO) has become a popular oil globally. However, the RBO extraction process leaves various residue products, which contain bioactive substances of varying potency which could be significant sources of functional ingredients for both food production and pharmaceutical manufacture. The objective of our study was to compare the bioactive substances in various by-products derived from the two rice bran oil processing methods; solvent extraction and cold pressing. The residues from solvent extraction processing contained up to 97.37 mg/100 g of γ-aminobutyric acid in defatted rice bran, and the rice acid oil contained high levels of vitamin E (tocopherols, tocotrienols), up to 120.59 mg/100 g, as well as γ-oryzanol (3829.65 mg/100 g), phytosterol (599.40 mg/100 g), and policosanol compounds (332.79 mg/100 g). All of these values are higher than in the residues derived from cold pressing. Importantly, high amounts of total nutraceuticals (8.3 kg/100 kg) were found in residues from both processing methods, indicating the commercial potential of these residues as a source of functional ingredients for food production, as dietary supplements, and in pharmaceutical manufacture.
米糠油（RBO）在全球范围内已成为一种受欢迎的油。然而，米糠油的提取过程会产生各种残渣产品，其中含有不同效力的生物活性物质，这些物质可能是食品生产和制药制造功能性成分的重要来源。我们的研究目的是比较两种米糠油加工方法（溶剂萃取和冷榨）产生的各种副产物中的生物活性物质。溶剂萃取加工的残渣在脱脂米糠中含有高达 97.37mg/100g 的γ-氨基丁酸，而米糠油酸中含有高水平的维生素 E（生育酚、三烯生育酚），高达 120.59mg/100g，以及γ-谷维素（3829.65mg/100g）、植物甾醇（599.40mg/100g）和角鲨烷醇化合物（332.79mg/100g）。所有这些值都高于冷榨副产物。重要的是，从两种加工方法的残渣中发现了大量的总营养保健品（8.3kg/100kg），这表明这些残渣作为功能性成分的商业潜力，可用于食品生产、作为膳食补充剂和在制药制造中。
