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Multivariate Data A...
Multivariate Data Analysis for Enhanced Interpretation of Electrochemical Impedance Spectra of Gramicidin-Ion Interactions in Phospholipid Monolayers
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- Lindholm-Sethson, Britta (author)
- Umeå universitet,Kemiska institutionen
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Geladi, Paul (author)
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Koeppe II, Roger E (author)
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Jonsson, Oskar (author)
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- Nilsson, David (author)
- Umeå universitet,Kemiska institutionen
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Nelson, Andrew (author)
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(creator_code:org_t)
- 2007-03-27
- 2007
- English.
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In: Langmuir. - : American Chemical Society (ACS). - 0743-7463 .- 1520-5827. ; 23:9, s. 5029-32
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
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- This article describes a multifrequency electrochemical impedance study of phospholipid monolayers on a mercury drop electrode in solutions containing electrolytes and gramicidin derivatives: gramicidin A (gA), gramicidin-BOC (g-BOC), and desformylgramicidin (g-des). The impedance spectra have been studied individually (univariate approach) and also transformed using a multivariate data reduction method (multivariate approach). It was shown that the two approaches are complementary. Thus the formation of K+-conducting channels is observed in gA only, and these channels can be distinguished from an interaction of all gramicidin derivatives with Mg2+. An unknown peptide interaction in the monolayer was observed on a slow time scale.
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- art (subject category)
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