کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1252070 1496330 2010 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Liposome fractionation and size analysis by asymmetrical flow field-flow fractionation/multi-angle light scattering: influence of ionic strength and osmotic pressure of the carrier liquid
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Liposome fractionation and size analysis by asymmetrical flow field-flow fractionation/multi-angle light scattering: influence of ionic strength and osmotic pressure of the carrier liquid
چکیده انگلیسی

Asymmetrical flow field-flow fractionation (AsFlFFF)/multi-angle light scattering (MALS) was employed for studying filter-extruded liposomes in carrier solutions with different ionic strength and osmolarity. By dilution of preformed liposome suspensions with different media, only the ionic strength in the external free aqueous phase was changed. Under such conditions the liposomes were found to elute at almost identical elution times, which is in contrast to earlier studies. This may be explained by two opposing effects: (a) modulation of inter-particulate and particle-wall-repulsion effects and (b) osmotic stress-induced changes in vesicle size. The latter effect was demonstrated when analysing liposomes upon dilution in media of constant ionic strength, but varying osmotic pressure (with or without 150 mmol L−1 sucrose supplement). The osmotic stress-induced change in liposome size was found to be size dependent. Larger liposomes appeared to both shrink and swell when exposed to hyper- or hypoosmotic media, respectively. Smaller liposomes appeared to shrink but not to swell. The potential causes of this effect are discussed.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemistry and Physics of Lipids - Volume 163, Issue 2, February 2010, Pages 141–147
نویسندگان
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