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Information @ a Glance

General

  • Gamma-oryzanol, isolated from rice bran oil, is a naturally occurring mixture of plant chemicals called sterols and ferulic acid esters.

  • Gamma-oryzanol is an oryzayl alcohol ester of ferulic acid having an antioxidant action.

  • Gamma-oryzanol is a mixture of ferulic acid esters of mainly the phytosterols campesterol, beta-sitosterol, 24-methyl-cycloartenol and cycloartenol.

  • Gamma oryzanol is an important biological anti-oxidant present in rice bran oil in significant quantities.

Process

  • Soxhlet extraction method was the most common technique used in the extraction of lipid from plant and animal tissues. The extractability of rice bran lipid using this method has been reported in the range of 18 - 20%.

  • The higher extractability of oryzanol in the present study could be due to the use of 3:2 chloroform: methanol mixture as the extracting solvent, where oryzanol in both non-polar and polar lipid fractions were extracted.

  • During saponification process, caustic refining of rice bran oil removes the oryzanol from the oil to the soap stock.

Uses

  • Oryzanol emulsions are used as antioxidants and preservatives for cosmetics and foods and such emulsions are also effective in preventing colour changes.

  • Gamma-oryzanol is effective against climacteric melancholia and the butyric ester of riboflavin is also effective in preventing arteriosclerosis.

  • It is known to have anti-itching, anti-dandruff and anti-aging properties.

  • It is effective in trading broad range of gastrointestinal disorders including stress induced gastric and duodenal ulcers.

  • Oryzanol is sold abroad as an agent for body building in humans and for the treatment of nerve imbalance and disorders of menopause.

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