| The equilibria of phosphatidylcholine-fatty acid and phosphatidylcholine-amine in monolayers at the air/water interface. | |
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MedLine Citation:
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PMID: 20888195 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Monolayers of phosphatidylcholine, fatty acid and amine and binary mixtures phosphatidylcholine-fatty acid or phosphatidylcholine-amine were investigated at the air/water interface. Phosphatidylcholine (lecithin, PC), stearic acid (SA), palmitic acid (PA), decanoic acid (DA) and decylamine (DE) were used to the experiment. The surface tension values of pure and mixed monolayers were used to calculate π-A isotherms. The surface tension measurements were carried out at 22°C using an improved Teflon trough and a Nima 9000 tensiometer. The Teflon trough was filled with a subphase of triple-distilled water. Known amounts of lipid dissolved in 1-chloropropane were placed at the surface using a syringe. The interactions between lecithin and fatty acid as well as phosphatidylcholine and amine result in significant deviations from the additivity rule. An equilibrium theory to describe the behaviour of monolayer components at the air/water interface was developed in order to obtain the stability constants of PC-SA, PC-PA, PC-DA and PC-DE complexes. We considered the equilibrium between the individual components and the complex and established that lecithin and fatty acid as well as phosphatidylcholine and amine formed highly stable 1:1 complexes. |
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Authors:
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Aneta D Petelska; Zbigniew A Figaszewski |
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Publication Detail:
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Type: Journal Article Date: 2010-09-15 |
Journal Detail:
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Title: Colloids and surfaces. B, Biointerfaces Volume: 82 ISSN: 1873-4367 ISO Abbreviation: Colloids Surf B Biointerfaces Publication Date: 2011 Feb |
Date Detail:
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Created Date: 2010-11-29 Completed Date: 2011-04-11 Revised Date: 2011-09-27 |
Medline Journal Info:
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Nlm Unique ID: 9315133 Medline TA: Colloids Surf B Biointerfaces Country: Netherlands |
Other Details:
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Languages: eng Pagination: 340-4 Citation Subset: IM |
Copyright Information:
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Copyright © 2010 Elsevier B.V. All rights reserved. |
Affiliation:
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Institute of Chemistry, University of Bialystok, Al. J. Pilsudskiego 11/4, 15-443 Bialystok, Poland. aneta@uwb.edu.pl |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Air Amines / chemistry* Decanoic Acids / chemistry Fatty Acids / chemistry* Lecithins / chemistry Membranes / chemistry Palmitic Acid / chemistry Phosphatidylcholines / chemistry* Stearic Acids / chemistry Surface Properties Temperature Water |
| Chemical | |
Reg. No./Substance:
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0/Amines; 0/Decanoic Acids; 0/Fatty Acids; 0/Lecithins; 0/Phosphatidylcholines; 0/Stearic Acids; 2016-57-1/decylamine; 334-48-5/decanoic acid; 57-10-3/Palmitic Acid; 57-11-4/stearic acid; 7732-18-5/Water |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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