Document Detail


The equilibria of phosphatidylcholine-fatty acid and phosphatidylcholine-amine in monolayers at the air/water interface.
MedLine Citation:
PMID:  20888195     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
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.
Authors:
Aneta D Petelska; Zbigniew A Figaszewski
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Publication Detail:
Type:  Journal Article     Date:  2010-09-15
Journal Detail:
Title:  Colloids and surfaces. B, Biointerfaces     Volume:  82     ISSN:  1873-4367     ISO Abbreviation:  Colloids Surf B Biointerfaces     Publication Date:  2011 Feb 
Date Detail:
Created Date:  2010-11-29     Completed Date:  2011-04-11     Revised Date:  2011-09-27    
Medline Journal Info:
Nlm Unique ID:  9315133     Medline TA:  Colloids Surf B Biointerfaces     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  340-4     Citation Subset:  IM    
Copyright Information:
Copyright © 2010 Elsevier B.V. All rights reserved.
Affiliation:
Institute of Chemistry, University of Bialystok, Al. J. Pilsudskiego 11/4, 15-443 Bialystok, Poland. aneta@uwb.edu.pl
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MeSH Terms
Descriptor/Qualifier:
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:
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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