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- W2333132356 abstract "The aim of the present study was to examine the effects of different pressure and temperature combinations on the concentrations of tocols homologues, policosanol, phytosterol, and γ-oryzanol in crude rice bran oil (RBO) using supercritical carbon dioxide (SC-CO 2 ). To effectively separate oily substances from bioactive substances, fatty acid ethyl esterification was performed by sulfuric acid or the lipase catalytic method. In sulfuric acid esterification, γtocotrienol content was decreased by ca. 50%, whereas in lipase esterification, γ-tocotrienol content was not decreased. Therefore, lipase catalytic esterification was performed for the fatty acid alkyl esterification of RBO. The fractional extraction of RBO ethyl esters was performed using SC-CO 2 in the condition of 9.62 Mpa, 10.34 MPa, or 11.03 MPa and 45C, 50C, or 55C. During the fractionation of RBO using SC-CO 2 , a little tocols content was extracted with fatty acid ethyl esters, but policosanol and phytosterol were not extracted. Especially, there is a high correlation (R=0.9306) between the density of CO 2 and tocols contents extracted to the fractions. The concentration rates of tocols and phytosterol were the highest in the condition of 55C and 9.62 MPa. Therefore, the lower CO 2 density applied, the more efficient the concentrations of tocols and phytosterol were in this study." @default.
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- W2333132356 date "2013-11-30" @default.
- W2333132356 modified "2023-09-27" @default.
- W2333132356 title "Concentration of Rice Bran Lipid Soluble Bioactive Substances Using Supercritical Carbon Dioxide" @default.
- W2333132356 doi "https://doi.org/10.13050/foodengprog.2013.17.4.362" @default.
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