No abstract

Lipid composition, physicochemical, antioxidant, and thermal properties of gurum seed oil obtained from supercritical CO 2 , screw pressing and hexane extraction were studied. Results showed that the highest yield of lipids was obtained by the hexane extraction (34.04%) as compared to supercritical CO 2 (30.05%) and screw pressing (27.5%), respectively. The physicochemical properties of oil extracted by different methods are important criteria to select the oil for edible purpose. Supercritical CO 2 gurum oil has higher linoleic acid composition in comparison to the screw press gurum oil and hexane gurum oil. Supercritical CO 2 gurum oil and hexane gurum oil showed lower free fatty acid values (0.60 and 0.46%, respectively). Supercritical CO 2 gurum oil has shown higher amounts of (C18:1-C18:1-C18:2)-TAG. Supercritical CO 2 gurum oil has excellent properties, especially in the terms of polyphenol, β-tocopherol, ergosta-7, 22-dein-3-ol, and antioxidant activity. Thus, suggesting the supercritical CO 2 gurum oil as desired alternative for extracting fats with altitude nutritional value, while keeping bioactive compounds intact.