We examined the effect of adsorbed monovalent ions on the surface charge of phosphatidylcholine (PC) - decylamine (DA) liposomal membranes. Surface charge density values were determined from electrophoretic mobility measurements of lipid vesicles performed at various pH levels. The interaction between solution ions and the PC-DA liposomal surface was described by a six component equilibrium model. The previously determined association constants of the -PO((-)) and -N((+))(CH(3))(3) groups of PC with H(+), OH(-), Na(+) and Cl(-) ions (K (A1H), K (B1OH), K (A1Na), K (B1C1)) were used to calculate K (B2OH), and K (B2C1), the association constants of the -N((+))H(3) group of DA with OH(-) and Cl(-) ions, providing an experimental verification for the proposed model.

中文翻译：

---

单价离子吸附对磷脂酰胆碱-癸胺脂质体膜电荷的影响。

我们检查了吸附的单价离子对磷脂酰胆碱 (PC)-癸胺 (DA) 脂质体膜表面电荷的影响。表面电荷密度值由在不同 pH 水平下进行的脂质囊泡的电泳迁移率测量确定。溶液离子与 PC-DA 脂质体表面之间的相互作用由六组分平衡模型描述。先前确定的 PC 的 -PO((-)) 和 -N((+))(CH(3))(3) 基团与 H(+)、OH(-)、Na(+) 和Cl(-) 离子（K (A1H)、K (B1OH)、K (A1Na)、K (B1C1)）用于计算 K (B2OH) 和 K (B2C1)，-N(( +))H(3) DA 组与 OH(-) 和 Cl(-) 离子，为所提出的模型提供实验验证。