کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9675526 | 1454099 | 2005 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Translational diffusion in charged phospholipid bilayer membranes
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
شیمی کلوئیدی و سطحی
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چکیده انگلیسی
The dielectric permittivity spectra of colloidal solutions of highly charged liposomes were analyzed. They showed two dispersion regions around 25 and <300Â MHz, which are attributed to rotational diffusion of the zwitterionic phospholipid molecules, and to the diffusion of the counterion atmosphere along the liposome surface, respectively. The lateral self-diffusion coefficient was obtained from the dielectric relaxation time of the zwitterionic phospholipid. The coefficient was determined in un-deionized samples subjected to processes of 40 and 72Â h deionization. The study found that the counterions, which were condensed over the liposome surface, facilitated the lateral diffusion of phospholipids within the bilayer.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Colloids and Surfaces A: Physicochemical and Engineering Aspects - Volumes 270â271, 1 December 2005, Pages 88-92
Journal: Colloids and Surfaces A: Physicochemical and Engineering Aspects - Volumes 270â271, 1 December 2005, Pages 88-92
نویسندگان
J.D. Solier, E. Galera-Cortés, R. Sabaté, J. Estelrich,