کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1252756 1496376 2006 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Determination of phase transition temperatures of lipids by light scattering
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Determination of phase transition temperatures of lipids by light scattering
چکیده انگلیسی

Various techniques have been proposed to specify the phase transition temperatures of surfactant molecules. The work reported herein deals with a new general method of Tc determination based on the optical properties’ modifications of aqueous surfactant solutions when the phase transitions occur in the phospholipid membrane. The shape alteration of supramolecular systems induced by the phase transition was correlated with the refraction and absorption coefficients of their aqueous dispersion. The mean count rate (average number of photons detected per second) measured with a Zetasizer Nano-S model ZEN1600 Dynamic Light Scattering Instrument, is representative of an emerging macroscopic phenomenon, but not directly size dependent and has been adapted to our expectations. Changes in the measured scattering intensity reflect changes in the optical properties of the material during temperature variations. Thus, this method allowed to specify the phase transition temperature of many natural or synthetic surfactants independently of their polar head or hydrophobic part.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemistry and Physics of Lipids - Volume 139, Issue 1, January 2006, Pages 11–19
نویسندگان
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