Potential profile across a charged spherical shell as a model for a biological cell.
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概要
- 論文の詳細を見る
Potential distribution across a charged membrane of a spherical shell of radius <I>a</I>, which serves as a model for a cell, is calculated on the basis of a membrane model that the membrane core is covered by an ion-penetrable surface charge layer of thickness <I>d</I> in which the membrane-fixed charges are distributed at a uniform density <I>N</I>. Curvature effects are found to become appreciable when <I>ka</I>_??_10 (<I>k</I>=Debye-Hiickel parameter). When <I>kd</I>_??_5, the potential far inside the surface charge layer is almost equal to the Donnan potential. When it <I>ka</I>>>1 and <I>kd</I>>>1, the surface potential (the potential at the boundary between the outer surface charge layer and the surrounding solution) becomes half the Donnan potential. The surface potential becomes identical to the Gouy-Chapman double layer potential as <I>d</I>→0 with the product <I>Nd</I> kept constant.
- 日本膜学会の論文
著者
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Ohshima Hiroyuki
Faculty Of Pharmaceutical Sciences Science University Of Tokyo
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Ohshima Hiroyuki
Faculty of Pharmaceutical Sciences and Institute of Colloid and Interface Science, Science University of Tokyo
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Ohshima Hiroyuki
Faculty of Pharmaceutical Sciences and Institute ofColloid and Interface Science, Science University of Tokyo
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