Antioxidant components and properties of five long-grained rice bran extracts from commercial available cultivars in Thailand

The influence of extraction methods on composition and antioxidant properties of rice bran oil

“…Cold press extraction represented 6.08 ± 0.34, 6.75 ± 0.3, and 6.48 ± 0.37 mg/g of γ-oryzanol content in CBlR, MRR, and SBrR bran oil, respectively (Figure 1). Previous studies have been reported on the recovery of γ-oryzanol from different RB varieties by methanol, hexane, and ethyl acetate mediated extraction techniques (Iqbal et al, 2005;Chotimarkorn et al, 2008;Lin & Lai, 2011). Varying quantity of γ-oryzanol have been reported based on the extraction methods and rice cultivars.…”

“…Considerable differences in antioxidant capacity of RBD extracts of different cultivars suggested that the content of the phytochemicals had a vast impact on their antioxidant properties (Iqbal et al, 2005;Chotimarkorn et al, 2008). The chemical composition (tocols, γ-oryzanol), and antioxidant properties of white, red, and brown rice bran were compared with the unique extraction method (Aguilar-Garcia et al, 2007;Finocchiaro et al, 2007).…”

Antioxidant activities of fractions from longan pericarps

“…Synthetic compounds such as butylated hydroxytoluene (BHT), butylated hydroxyanisole (BHA) and tertiarybutylhydroquinone (TBHQ), are widely employed as preservatives in the food and pharmaceutical industry nowadays (Buenger et al, 2006). But there are numerous reports on adverse effects of synthetic antioxidants such as toxicity and carcinogenicity (Chotimarkon et al, 2008). Many researchers hence focused on exploration of effective and economical natural antioxidants such as plant polyphenols, flavonoids, vitamin C or E, etc.…”

Anti-Inflammatory Activities of Constituents in Sang Yod Rice Extracts, γ-Oryzanol, Vitamins E, B1, B2 and B3, Using Inhibitory Effects on Nitric Oxide (NO) Production in Lipopolysaccharide (LPS) Activated RAW 264.7 Murine Macrophage Cells

“…Some of these include water-soluble, fat-soluble and insoluble antioxidants, such as γ-oryzanol, vitamin E, vitamins B1, B2, B3 and B6, tocophenol, tocotrieonols, selenium, phenolic acids, and phytic acid [4][5][6][7][8]. There is some research indicating that consumption of rice bran or rice bran oil of brown rice is beneficial in treating a variety of diseases, including: type 2 diabetes; hypertension; hyperlipidemia; cardiovascular diseases; stomach and colon cancer; improvement of immune system and liver function.…”

“…Relatively fewer data are available for pigmented varieties of rice, and most are in vitro studies that demonstrate that several constituents of such rice species and cultivars exhibit strong antioxidant activities [1,[4][5][6][7][8]. There is only one in vitro report of antibacterial activities of pigmented-rice crude extracts from four different types of rice [20].…”