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[Lipid peroxidation and antioxidant protection system in cosmonauts following short-term missions to the International Space Station].

Blood serum of Russian members (n = 21) of the 8 to 12-day visiting missions to the ISS was analyzed before and after mission for products of lipid peroxidation, i.e. diene conjugates, malone dialdehyde, Schiff bases and tocopherol, the primary lipid antioxidant. No reliable change was found in the parameters postflight as compared with preflight values. It may be concluded that 14 days in orbital flight and the factors of re-entry and early recovery do not affect significantly the mechanisms of free radical lipid oxidation and functioning of the antioxidant protection system.