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- W1976993834 abstract "The partition coefficient of n-hexane from water to bilayers of dioleoyl phosphatidylcholine and egg lecithin were measured as a function of temperature. Over a 50° C temperature range, the partition coefficient decreased linearly with temperature. The addition of cholesterol (1 : 1 mol ratio) to those bilayers reduced the partition coefficient by, at most, a factor of 2.5 at 25° C. The thermodynamic transfer parameters so obtained were compared to those of bulk hydrocarbon liquids and sodium dodecyl sulphate micelles. The results indicate that a bulk hydrocarbon liquid is not a good model for the interior of a bilayer whereas sodium dodecyl sulphate has approximately the same thermodynamic transfer parameters as egg lecithin. A comparison of the thermodynamic transfer parameters of n-hexane from a hydrocarbon liquid to either egg lecithin or dioleoyl phosphatidylcholine at 25° C shows that energetically and entropically the n-hexane prefers the bulk hydrocarbon phase whereas enthalpically it prefers the bilayer. These data imply that the n-hexane is aligned, on the average, parallel to the acyl chains. The partition coefficient, K, of n-hexane from water into various solvents follows the sequence KHC > KEL ≈ KSDS ⩾ KDP > KOct, where the subscript HC represents hydrocarbon; EL, egg lecithin; SDS, sodium dodecyl sulfate; DP, dioleoyl phosphatidlcholine; DPC, dioleoyl phosphatidylcholine cholesterol; and Oct, n-octanol." @default.
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- W1976993834 date "1977-08-01" @default.
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- W1976993834 title "A thermodynamic study of the partition of n-hexane into phosphatidylcholine and phosphatidylcholinecholesterol bilayers" @default.
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- W1976993834 doi "https://doi.org/10.1016/0005-2736(77)90289-9" @default.
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