The influence of melafen on structural properties of phospholipid membranes

Автор: Alekseeva Olga Mikhaylovna, Krivandin Aleksey Vladimirovich, Shatalova Olga Vladimirovna, Krementsova Anna Vladimirovna, Kim Yuriy Aleksandrovich

Журнал: НБИ технологии @nbi-technologies

Рубрика: Технико-технологические инновации

Статья в выпуске: 5 (14), 2014 года.

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The paper studies the effect of aqueous solutions of melamine salt of phosphonic acid (Melafen), used in crop production, on structural and thermodynamic properties of phospholipid membranes. The multilamellar liposomes formed from individual synthetic dimyristoylphosphatidylcholine (DMPC), or natural phospholipid mixture (egg lecithin) was studied by differential scanning microcalorimetry (DSC) and small-angle X-ray scattering (SAXS). The method of DSC was used to appraise the influence of Melafen aqueous solutions (10-17 M to 10-3 M) on thermodynamic parameters of lipid melting (temperature, enthalpy and cooperation of phase transition) in suspension of liposomes formed from DMPC. On the basis of DSC data it was concluded that the microdomain structural organization of DMPC membranes was altered by Melafen aqueous solutions as polymodal type. We did not reveal by the SAXS method any noticeable integral structural changes in membranes of egg lecithin in multilamellar liposomes as well as in their stacking parameters (period and degree of order) in Melafen aqueous solutions (10-21 M to 10-6 M). This range of Melafen concentrations is wider than that used in crop production. Relying on the results of this work it can be inferred that microdomain structure of membranes composed of individual neutral phospholipids is changed in Melafen aqueous solutions at the wide concentration range of Melafen. At the same time, Melafen does not affect the overall structure of lipid membranes composed of a natural phospholipid mixture.

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Melafen, liposomes, differential microcalorimetry, small-angle x-ray scattering

Короткий адрес: https://sciup.org/14968354

IDR: 14968354   |   DOI: 10.15688/jvolsu10.2014.5.2

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