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The Adsorption Coefficient (K) for Determination of Total Lipid and Gamma Oryzanol Content in Rice Bran Varieties from the Northern of Thailand

Anakhaorn Srisaipet, Supalak Daungnate, and Jariyaporn Nukua
Department of chemistry Faculty of Science Maejo University, Chiang Mai, Thailand
Abstract—This research has studied the extraction and analyzation of gamma- oryzanol and total lipid in new rice bran glutinous varieties which were analyzed by the developed technique. The adsorption coefficient (K) of a solute between a solid phase and a solvent phase were studied in the solid-liquid extraction which is defined by the solid-liquid equilibrium condition used to determine the oil extracted in short time so the operation of extraction time been considered. The percentage of oil extracted (% dry weight) is highly increase when time of extraction at 10 minute (30°C) and then it shown slowly increasing rate. From the K values, it was estimate that about 16.52-41.98 mg/g dry basis of the lipid and 1.15-2.96 mg/g dry basis of the gamma oryzanol were extract by heaxane. Sanphatong 1 had highest total lipid and gamma oryzanol while the lowest content was found in Maejo 2.
 
Index Terms—Adsorption coefficient, rice bran, gamma oryzanol, total lipid

Cite: Anakhaorn Srisaipet, Supalak Daungnate, and Jariyaporn Nukua, "The Adsorption Coefficient (K) for Determination of Total Lipid and Gamma Oryzanol Content in Rice Bran Varieties from the Northern of Thailand", Journal of Medical and Bioengineering, Vol. 2, No. 3, pp. 173-176, September 2013. Doi: 10.12720/jomb.2.3.173-176
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