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- W178588077 abstract "α-Tocopherol significantly perturbs the phase transition of fully saturated phospholipids and its effect is considerably bigger than that of α-tocopheryl acetate as observed by differential scanning calorimetry and Fourier-transform infrared spectroscopy. This observation remarks the importance of its phenolic hydroxy1 group in determining the interaction of α-tocopherol with phospholipids. However, this hydroxyl group is not hydrogen bonded to neither the carbonyl group nor the phosphate group of phosphatidylcholine, although it seems able of forming a hydrogen bonding with the carbonyl group of phosphatidylethanolamine. By studying the intrinsic fluorescence of α-tocopherol, it was found that its chromanol group is located near the water-lipid interface, although it is not accesible from the water phase. On the other hand, α-tocopherol was found to partition with preference for the most fluid domains in the membrane, as seen by differential scanning calorimetry. The dynamics of α-tocopherol in membranes was examined through the quenching of its intrinsic fluorescence was examined found to have a diffusion coefficient similar to that of phospholipids. α-tocopherol was also found to promote the Hii phase of phosphatidylethanolamine, having a stronger effect than α-tocopherol acetate. Finally, α-tocopherol was shown to have a stabilizing effect on liposomes, when they were stored for periods of time longer than one year." @default.
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- W178588077 date "1991-01-01" @default.
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- W178588077 title "Location and Dynamics of α-Tocopherol in Membranes" @default.
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- W178588077 doi "https://doi.org/10.1007/978-3-0348-7454-0_8" @default.
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