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- W2018756659 abstract "Spin-labeled aqueous dispersions of total phospholipid extracts from whole brains of hibernating hamsters and rats chronically consuming ethanol were compared with dispersions from control animals. Order parameter values and approximate rotational correlation times for the nitroxide spin labels indicated that ethanol consumption results in an adaptive decrease in bilayer membrane fluidity, while hibernation produces increases in fluidity. Since it has been proposed that changes in plasmenylethanolamine such as those seen with hibernation play a role in the homeoviscous adaptation of brain membranes, electron spin resonance studies using aqueous phospholipid dispersions containing equimolar mixtures of rat brain phosphatidylethanolamine and phosphatidylcholine, or synthetic dioleylphosphatidylcholine and dioleylphosphatidylethanolamine, and brain plasmenylethanolamine were performed. The molar amount of plasmenylethanolamine was varied within the ethanolamineglycerophospholipid fraction of each dispersion. Order parameter values of spin labels in liposomes containing brain phosphatidylcholine and phosphatidylethanolamine increased in parallel with increases in plasmenylethanolamine concentrations, indicating that fluidity was decreasing. Liposomes composed of synthetic dioleyl phospholipids exhibited biphasic changes in order parameter (S) values as plasmenylethanolamine replaced the diacyl form. Below 30% (mol%) plasmenylethanolamine, S values decreased, while above 30%, S values were seen to increase; indicating an initial fluidization, followed by a decrease in fluidity." @default.
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- W2018756659 title "Effects of plasmenylethanolamine on the dynamic properties of the hydrocarbon region of mixed phosphatidylcholine-phosphatidylethanolamine aqueous dispersions. A spin label study" @default.
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- W2018756659 doi "https://doi.org/10.1016/0005-2736(83)90342-5" @default.
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