𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Influence of Size on Electrokinetic Behavior of Phosphatidylserine and Phosphatidylethanolamine Lipid Vesicles

✍ Scribed by Maria Teresa Roy; Montserrat Gallardo; Joan Estelrich

Publisher
Elsevier Science
Year
1998
Tongue
English
Weight
125 KB
Volume
206
Category
Article
ISSN
0021-9797

No coin nor oath required. For personal study only.

✦ Synopsis

The aim of this study was to examine the electrokinetic properties of liposomes containing either phosphatidylethanolamine (PE) or phosphatidylserine (PS). Zeta potential was determined by laser-Doppler microelectrophoresis. The presence of PE enhanced the slight negative charge on the phosphate group of phosphatidylcholine. A linear relation between zeta potential and PE concentration was found. Absolute values of zeta potential were higher in PS liposomes and showed an exponential dependence on the PS content. The electrophoretic mobility depended not only on the percentage of aminophospholipid but also on the size of vesicles. This behavior can be explained by the relaxation effect. From geometrical considerations, it was possible to calculate the theoretical surface charge densities. Comparing experimental with theoretical values, an underestimation of zeta potential was found by the electrokinetic classic theory in the experimental conditions used. Copyright 1998 Academic Press.

πŸ“œ SIMILAR VOLUMES

Effect of Amino Acids and Polypeptides o
Effect of Amino Acids and Polypeptides on Electrokinetic Properties of Pure Lipid Vesicles and Mixed Vesicles with Crown Ethers
✍ Hideo Matsumura; Chiharu Obata; Kiyoko Kawahara; Kunio Furusawa πŸ“‚ Article πŸ“… 1993 πŸ› Elsevier Science 🌐 English βš– 255 KB

Electrophoretic mobilities of phospholipid vesicles and mixed vesicles of phospholipid with a crown ether compound have been studied in the presence of amino acids (glutamic acid, lysine, and alanine) or polypeptides. L-lysine has a minor effect on the electrophoretic mobilities, in contrast to l-gl

Influence of pH on elution behavior in m
Influence of pH on elution behavior in micellar electrokinetic capillary chromatography
✍ Rasmussen, H. T. ;McNair, H. M. πŸ“‚ Article πŸ“… 1989 πŸ› John Wiley and Sons 🌐 English βš– 180 KB πŸ‘ 1 views

Tenax GC as packing material, allows the analysis of trace volatile compounds which require a pre-column enrichment step, with better performance than that provide by concentrating in a Vigreux column and subsequent GC analysis of minor compounds. Moreover, losses of volatiles of interest are decrea