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The Equilibria Between Monovalent Ions and Phosphatidylcholine Monolayer at the Air/Water Interface
The effect of monovalent ion (Li(+), Na(+), Cs(+)) interaction with monolayers of phosphatidylcholine (lecithin, PC) was investigated at the air/water interface. We present surface tension measurements of lipid monolayers obtained using a Langmuir method as a function of monovalent ion concentration...
| Autores principales: | , |
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| Formato: | Online Artículo Texto |
| Lenguaje: | English |
| Publicado: |
Springer-Verlag
2013
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| Materias: | |
| Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3682101/ https://www.ncbi.nlm.nih.gov/pubmed/23665945 http://dx.doi.org/10.1007/s00232-013-9558-3 |
| Sumario: | The effect of monovalent ion (Li(+), Na(+), Cs(+)) interaction with monolayers of phosphatidylcholine (lecithin, PC) was investigated at the air/water interface. We present surface tension measurements of lipid monolayers obtained using a Langmuir method as a function of monovalent ion concentration. Measurements were carried out at 22 °C using a Teflon trough and a Nima 9000 tensiometer. Interactions between lecithin and monovalent ions result in significant deviations from the additivity rule. An equilibrium theory to describe the behavior of monolayer components at the air/water interface was developed in order to obtain the stability constants and area occupied by one molecule of PC–monovalent ion complexes (PC(−)Me(+)). |
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