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.

Enzyme-method esterification deacidification technology for rice bran oil with high acid value

Abstract: The invention discloses an enzyme-method esterification deacidification technology for rice bran oil with a high acid value. The technology comprises the following steps: step one, obtaining rice bran oil with a high acid value; step two, carrying out enzyme-method esterification deacidification: heating the rice bran oil obtained in the step one under stirring in vacuum, adding glycerin and Lipozyme 435 immobilized lipase, carrying out esterification reactions between rice bran oil and glycerin in the presence of Lipozyme 435 immobilized lipase so as to obtain the de-acidified rice bran oil; step three, obtaining rice bran oil with a low acid value. In the provided technology, under a certain vacuum degree and temperature, the Lipozyme 435 immobilized lipase is used to catalyze the esterification reactions between the free aliphatic acids in rice bran oil with a high acid value and the glycerin so as to reduce the content of the free aliphatic acids, and thus the acid value of the rice bran oil can be reduced to below 3 mgKOH/g. The provided technology has the advantages of safety, environment-friendliness, low cost, and high refining yield, and is suitable for being applied to edible oil production.

Ultrafiltration-based degumming of crude rice bran oil using a polymer membrane

Abstract: Membrane technology has been gaining momentum in industrial processes, especially in food technology. It is believed to simplify processes, reduce energy consumption, and eliminate pollutants. The objective was to study the performance of polyvinylidene fluoride (PVDF) and polyethersulfone (PES) polymeric membranes in the degumming of the miscella of crude rice bran oil by using a bench-scale tangential filtration module. In addition, oil miscella filtration techniques using hexane and anhydrous ethyl alcohol solvents were compared. All membranes showed the retention of phospholipids and high flow rates. However, the best performance was observed using the 50-kDa PVDF membrane in miscella hexane solvent, with a 95.5% retention of the phosphorus concentration (by a factor of 1.4), resulting in a permeate with 29 mg·kg−1 of phosphorus and an average flow rate of 48.1 L·m−2·h−1. This technology can be used as a low-pollution, economical alternative for the de-gumming of crude rice bran oil, being effective in the removal of hydratable and non-hydratable phospholipids, resulting in oils with a low phosphorus content.

In vitro antioxidant assay of medium chain fatty acid rich rice bran oil in comparison to native rice bran oil

Abstract: The study aimed to evaluate the in vitro antioxidant activity of medium chain fatty acid (MCFA) rich-rice bran oils in comparison with native rice bran oil. Different in vitro methods were used to evaluate the free radical scavenging activity, metal chelation activity, reducing acitivity, ABTS radical scavenging activity, thiobarbituric acid (TBA) value and so on at different concentrations of the oils such as 10–100 μg/mL. Inhibition of lipid peroxidation was evaluated measuring thiobarbituric acid responsive substance (TBARS) and conjugated diene formation. All the oils showed potent antioxidant activity at 100 μg/mL concentration. TBARS formation and conjugated diene formation was lower with MCFA rich oils i.e. the inhibition of lipid peroxidation was more in MCFA rich oils than original rice bran oil. Caprylic acid rich rice bran oil showed maximum antioxidant activity in comparison to capric- and lauric acid rich rice bran oils. Overall the MCFA rich rice bran oils showed to be more potent antioxidant than rice bran oil due to their lower unsaturated fatty acid content.

Health care rice bran oil capable of reducing blood lipid and preparation method of health care rice bran oil

Abstract: The invention discloses health care rice bran oil capable of reducing blood lipid and a preparation method of the health care rice bran oil The health care rice bran oil comprises the raw materials in parts by weight: 40-60 parts of rice bran oil, 10-20 parts of olive oil, 8-12 parts of corn oil, 8-12 parts of sunflower oil, 5-15 parts of haws, 5-9 parts of radish seed, 6-10 parts of semen cassiae, 3-5 parts of a rhizoma alismatis extract, 6-9 parts of a cattail pollen extract, 4-6 parts of a giant knotweed rhizome extract, 3-9 parts of turmeric, 3-5 parts of a kadsura pepper stem extract, 3-6 parts of hazelnuts, and 3-6 parts of walnut kernels The invention further discloses a preparation method of health care rice bran oil capable of reducing blood lipid The preparation method comprises the following steps: S1, pretreating the haws and the radish seed so as to obtain mixed pretreated substances; S2, pretreating the semen cassiae so as to obtain semen cassia pretreated substances; S3, pretreating the turmeric so as to obtain turmeric pretreated substances; S4, squeezing crushed hazelnuts, crushed walnut kernels, the mixed pretreated substances, the semen cassia pretreated substances, the turmeric pretreated substances, the rhizoma alismatis extract, the kadsura pepper stem extract, the cattail pollen extract and the giant knotweed rhizome extract for making squeezed oil; and S5, mixing the rice bran oil, the olive oil, the corn oil, the sunflower oil and the squeezed oil so as to obtain health care rice bran oil The health care rice bran oil disclosed by the invention invigorates stomachs, promoting digestion, reduces cholesterol, is high in blood lipid reducing capacity, comprehensive in nutrition and good in antioxygenic property, uses a small number of organic solvents, and is good in blood lipid reducing effect, and the average effectiveness level reaches 96%

The Physical Characterization and Sorption Isotherm of Rice Bran Oil Powders Stabilized by Food-Grade Biopolymers

Abstract: Rice bran oil (RBO) is used in several products in the food, cosmetics, and pharmaceutical industries due to its desirable health, flavor, and functional attributes. The formation and physicochemical properties of microencapsulated RBO stabilized by different biopolymers were investigated. Oil-in-water emulsions (10% RBO, citrate buffer pH 7) stabilized by either 3.5% whey protein isolate (WPI) or 7.0% modified starch (MS) containing maltodextrin (DE18) as a carrier agent were initially prepared. The diameter of emulsion droplets produced by WPI and MS were considerably smaller than 300 nm and 25 μm for dried particles. The resulting powders had poor to fair flowability and high cohesiveness characteristics: Carr index (27–37) and Hausner ratio (1.4–1.6). The microencapsulation efficiency of the spray-dried powders ranged from 92–95%. Moisture sorption isotherms of the powders were determined by a gravimetric method, while their glass transition temperatures (Tg) were determined by differential scanning c...