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.

Rice bran composition and its emerging potential applications

Abstract: Rice bran is a by-product of milling industry and constitutes about 10% total weight of rough rice. It is mainly composed of germ, aleurone, pericarp, and subaleurone layer. It is an important source of sterols, dietary fibers, fatty acids, minerals, and vitamins. Prevalent scientific argument on several health benefits is related to dietary fiber consumptions. The attitude of consumers toward health foods is auspicious and the scope for functional foods is increasing in the world market globally. The application of rice bran is limited at industry level due to rancidity caused by the contact of rice bran oil with lipases in process of milling. Several stabilization approaches have been ongoing for rice bran supplementation in various food preparations. Rice bran oil is emerging as an excellent candidate for its use as plant-derived solvent. Rice bran oil is used as solvent for the extraction of volatile bioactive compounds, nonvolatile bioactive compounds, volatile aromatic compounds (VACs), polycyclic aromatic hydrocarbons (PAHs), and carotenoids. In view of significance of rice bran oil, this chapter focus on rice bran oil functionalities, potential application for health, and also describes the uses of rice bran oil as solvent.

Process for the isolation of oryzanols from rice bran oil soap stock

Abstract: The present invention relates to a process for the isolation of oryzanols from rice bran oil soap stock by (a) saponifying the oil present in soap stock with an alkali followed by neutralisation of the excess alkali, (b) converting the soap stock into anhydrous, porous soap noodles, (c) extracting the soap noodles with an organic solvent, (d) crystallising the crude unsaponifiable matter to remove impurities, (e) subjecting the residue to column chromatography to obtain an oryzanol rich fraction, and (f) recrystallising the oryzanol rich fraction using an organic solvent to obtain pure oryzanol.

Production of oryzanol-rich rice bran oil

Abstract: PURPOSE: To provide a purification method by which rice bran oil or rice embryo oil is purified efficiently in a high yield and oryzanols., which are physiolgically useful and removed by the conventional purification method, are concentrated to give an edible oil rich in nutriment. CONSTITUTION: A rice bran oil is purified by removing fatty acids contained in it by steam distillation in a vacuum without using an alkali such as potassium hydroxide, giving the oil contg. high concns. of oryzanols. The fatty acids contained are removed by steam distillation by blowing steam into the oil in a high vacuum at a high temp. pref. by using a single-shell vacuum distillation apparatus convenient for evaporation and separation. COPYRIGHT: (C)1994,JPO

Isolation of Gamma and Delta Tocotrienols from Rice Bran Oil Deodorizer Distillate Using Flash Chromatography

Abstract: Gamma (γ-T3) and delta (δ-T3) tocotrienols are the most potent natural protective agents against harmful effects of radiation exposure and there is substantial interest in advancing these tocols toward Food and Drug Administration approval. However, co-administration with alpha tocopherol is reported to interfere with the radioprotective properties of the tocotrienols. The objective of this study was to test various flash chromatography conditions for the purification of fractions with a high proportion of γ-T3 or δ-T3 and a minimal amount of alpha isomers from tocol extract obtained from rice bran oil deodorizer distillate (RBODD). Load size (0.125, 0.250, 0.500 and 1.000 g), sample cartridge type (pre-packed silica cartridge, empty cartridge+Celite 545) and mobile phase gradient [varying proportions of hexane–acetic acid (99.1:0.9 v/v) and ethyl acetate–acetic acid (99.1:0.9 v/v)] were evaluated. Peak resolution was best with a load size of ~1 % column capacity and a 5-g silica sample cartridge coupled with a 12-g silica column. A linear gradient of 0.8 % ethyl acetate–acetic acid (99.1:0.9 v/v) to hexane–acetic acid (99.1:0.9 v/v) (50 min) → 100 % ethyl acetate–acetic acid (99.1:0.9 v/v) (5 min) resulted in the best separation of tocols. The method developed was used to isolate tocols from samples of crude RBODD, tocol concentrate and tocol-rich extract. The use of these conditions with a tocol-rich extract resulted in several fractions containing 100 % purities of both γ-T3 and δ-T3.

Sunscreening method using rice bran oil

Abstract: Rice bran oil when applied to the skin as such or when incorporated in a pharmaceutically acceptable carrier is effective as a sunscreening agent in protecting the skin against sunburn upon exposure to ultraviolet radiation in the region of from about 2950 to 3150 angstrom units.