NOTE - ANTIOXIDANT PROPERTIES OF LIPID FRACTIONS FROM DEINOCOCCUS-RADIOPHILUS STRAIN UWO1055

Lipids of the radio-resistant bacterium Deinococcus radiophilus were t ested for their antioxidant properties. The crude lipid extract showed a significant antioxidant effect in linoleic acid emulsion. The crude extract was separated to polar and non-polar lipid fractions. The non -polar fraction showed an antioxidant effect in both suspensions and e mulsions of linoleic acid, and inhibition of oxidation in a beta-carot ene emulsion, Lipids of the non-polar fraction were separated and thei r antioxidant activity was determined in a beta-carotene emulsion; the lipid that was marked NP9 showed the highest antioxidant effect. Lipi d NP9 inhibited oxidation in a beta-carotene emulsion in the concentra tion range of 5-51 ppm. It is suggested that the antioxidant activity of lipids of D. radiophilus contribute to its radio-resistance.