Adsorption of N-dodecyl-.BETA.-alanine at the air-solution interface with the spread monolayer of lecithin or dilaurin. I. Adsorption isotherms.
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概要
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The applicability of the Gibbs adsorption isotherm was examined for the adsorption of <I>N</I>-dodecyl-β-alanine (NDA) at the air-solution interface with the spread monolayer of lecithin (DML) or dilaurin (DIL). In order to derive adsorption isotherms, the spread monolayer was treated energetically as a part of the adsorbed monolayer. The isotherms were derived for the following cases: (a) a nonideal mixing of the spread and adsorbed molecules and (b) a nonideal adsorption associated with a conformational change due to the complex formation between monolayer molecules. The isotherm derived for case (a) coincided with the observed isotherm of NDA adsorbed into the DIL monolayer, but deviated from the observed isotherm of NDA adsorbed into the DML monolayer. The DML–NDA isotherm was regarded as to be explained by the isotherm derived for case (b). Further, the applicability of the Pethica's isotherm to the adsorption of NDA in both systems was examined.
- 公益社団法人 日本化学会の論文
著者
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Tsutsui Takao
Department Of Health Policy And Management Institute Of Industrial Ecological Sciences University Of
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Tajima Kazuo
Department of Chemistry Faculty of Science Tokyo Metropolitan University
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