Note: Antioxidant properties of lipid fractions from Deinococcusradiophilus strain UWO1055

摘要

Lipids of the radio-resistant bacterium Deinococcus radiophilus were tested 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 emulsions of linoleic acid, and inhibition of oxidation in a beta-carotene emulsion, Lipids of the non-polar fraction were separated and their antioxidant activity was determined in a beta-carotene emulsion; the lipid that was marked NP9 showed the highest antioxidant effect. Lipid NP9 inhibited oxidation in a beta-carotene emulsion in the concentration range of 5-51 ppm. It is suggested that the antioxidant activity of lipids of D. radiophilus contribute to its radio-resistance.