Rice bran oil

About: Rice bran oil is a research topic. Over the lifetime, 2102 publications have been published within this topic receiving 32504 citations.

Nutritional studies of rice bran oil

Abstract: Rice bran oil (RBO) is not a popular oil worldwide, but its demand is increasing due to its popularity as a “healthy oil” in Asian countries, particularly in Japan, Korea, India, China, and Indonesia. RBO is an excellent cooking oil and salad oil due to its high smoke point and delicate flavor. It is unique among edible oils due to its rich source of commercially and nutritionally important phytoceuticals such as oryzanol, lecithin, squalene, phytosterols, polyphenols, tocopherols, tocotrienols, and many more. Many studies on humans and animals have shown that RBO is as effective as some other vegetable oils that are rich in polyunsaturated fatty acids in lowering plasma cholesterol levels and lipoprotein profiles. In some cases, RBO was found to lower plasma cholesterol more effectively, and this effect can be attributed to the occurrence of these other specific components in RBO. This chapter provides a comprehensive review of the phytonutrients from RBO that have shown promising disease-preventing and health-related benefits in experimental research studies.

Evaluation of physicochemical changes in cooking oil during heating

Abstract: Rice bran oil and double fractionated palm olein (DF palm olein) were heated at 180 C for 50 hr to measure lipid deterioration in the oils. Free fatty acid content of both oils increased during heating; however, iodine value and smoke point decreased. Solid fat contents of both oils were unaffected by heating time. Cloud point of rice bran oil was much lower than that of palm olein. Color of oils changed gradually to dark brown from light yellow with increased heating time. Absolute content of polyunsaturated fatty acid, such as linoleic acid, reduced more than that of monounsaturated fatty acid, such as oleic acid, in both oils. In both oils, iodine value correlated very well with linoleic acid content, with correlation coefficient higher than 0.96.

A simplified model to describe the kinetic behavior of supercritical fluid extraction from a rice bran oil byproduct.

Abstract: The mathematical modeling of the overall extraction curve (OEC) was performed using experimental data of supercritical flu id extraction (SFE) fro m a byproduct of the rice bran oil (RBO) industry. The soapstock derived fro m the RBO deacidification process was used as raw material because it contains a significant amount of γ-ory zanol, wh ich is a valuable natural antio xidant. The main goal of this work was to describe the OEC by a simplified model using the kinetic data obtained for the SFE fro m rice bran oil soapstock (RBOS). The global y ield isotherms (GYI) were used to select the best operational conditions (temperature and pressure) based on the extract ion yield and the γ-oryzanol content of the obtained extract. The OEC was fitted to four simplified models and the kinetic parameters which characterize the constant extraction rate (CER) were estimated. The highest values for the extraction yield (12.5 %, w/w), the γ-oryzanol content (16 %, w/w), and the γ-ory zanol recovery rate (55 %, w/ w) were found at 30 M Pa/333K. The proposed spline model presented the best fit to experimental data and quantitatively described the OEC. The estimated time span of the CER period (tCER) was 70 min and the corresponding solvent to feed (S/F) ratio and extraction yield were 23 and 9.4 %, respectively.