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2013 | 11 | 3 | 424-429
Tytuł artykułu

Phosphatidylcholine - Mg2+ equilibria in a monolayer at the air/water interface

Treść / Zawartość
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
Abstract The interaction between Mg2+ and a phosphatidylcholine (lecithin, L) monolayer at the air/water interface was investigated. Surface tension measurements (Langmuir method) of phosphatidylcholine monolayers as a function of Mg2+ concentration were carried out at 22°C using a Teflon trough and a Nima 9000 tensiometer. Interactions between phosphatidylcholine and Mg2+ result in significant deviations from additivity. An equilibrium theory was developed to obtain the stability constants and areas occupied by one molecule of LMg+ and L2Mg. The stability constants were K 1 = 9.95×102 m2 mol−1 and K 2 = 3.87×104 m2 mol−1. The area occupied by LMg+ is 77 Å2 molecule−1, while that occupied by L2Mg is 109 Å2 molecule−1. The Gibbs free energies of complexation for LMg+ and L2Mg are −16.91 ± 0.51 and −25.88 ± 0.76 kJ mol−1. Graphical abstract [...]
Wydawca
Czasopismo
Rocznik
Tom
11
Numer
3
Strony
424-429
Opis fizyczny
Daty
wydano
2013-03-01
online
2012-12-28
Twórcy
  • Institute of Chemistry, University in Bialystok, 15-443, Bialystok, Poland , aneta@uwb.edu.pl
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Typ dokumentu
Bibliografia
Identyfikatory
Identyfikator YADDA
bwmeta1.element.-psjd-doi-10_2478_s11532-012-0170-7
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