A Comparative Monolayer Film Behavior Study of Monoglucosyl Diacylglycerols Containing Linear, Methyl Iso-, and ω-Cyclohexyl Fatty Acids

Autor:	D. A. Cadenhead, B. Asgharian† and, D. Mannock and, R. N. McElhaney
Rok vydání:	2000
Předmět:	chemistry.chemical_classification Chemistry Condensation Fatty acid Surfaces and Interfaces Condensed Matter Physics Crystallography Glycolipid Biochemistry Monolayer Electrochemistry Isobar Molecule General Materials Science Thermal stability Spectroscopy Polyunsaturated fatty acid
Zdroj:	Langmuir. 16:7315-7317
ISSN:	1520-5827 0743-7463
DOI:	10.1021/la0003645
Popis:	A comparative monomolecular film study of a series of 1,2-di-O-(α-d-glucopyranosyl)-sn-glycerols in which the acyl chains were 16:0, 18:0, 19:iso, and 15:ω-cyclohexyl, was carried out at the air/water interface. Area/temperature isobars were obtained in the 20° through 60 °C range with the lipids going from fully condensed to fully expanded. It was found that the area/molecule shift between the expanded and condensed states decreased in the order 16:0 and 18:0 > 19:iso > 15-ω-cyclohexyl, with the expanded state of the ω-cyclohexyl glycolipid being the most condensed. Reduction of the area/molecule shift arose through an expansion of the condensed state and a condensation of the expanded state. Isotherms of the straight-chain glycolipids showed only a small expansion on changing the pH from 5.6 to 2.0, but the ω-cyclohexyl glycolipid showed no effect. All the glycolipids studied showed thermal stability up to the 60 °C range, in contrast with previously obtained results on similar phosphatidylcholines, whi...
Databáze:	OpenAIRE
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