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化学学报
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化学学报 ›› 2007, Vol. 65 ›› Issue (14): 1285-1288.    下一篇

研究通讯

电解质对带电磷脂自组装行为的影响

林美玉, 李莉, 邱枫, 杨玉良*   

  1. (复旦大学高分子科学系 聚合物分子工程教育部重点实验室 上海 200433)
  • 投稿日期:2006-12-30 修回日期:2007-03-16 发布日期:2007-07-28
  • 通讯作者: 杨玉良

Effects of Electrolytes on the Assembling Structures of Charged Lipids

LIN Mei-Yu; LI Li; QIU Feng; YANG Yu-Liang*   

  1. (The Key Laboratory of Molecular Engineering of Polymers, Ministry of Education, Department of Macromolecular Science, Fudan University, Shanghai 200433)
  • Received:2006-12-30 Revised:2007-03-16 Published:2007-07-28
  • Contact: YANG Yu-Liang

PDF

813

被引次数

7

运用光学显微镜研究了电解质对心磷脂聚集形态的影响. 结果表明, 阳离子的价态和浓度对心磷脂的聚集形态有很大影响, 而离子半径及同一价态下离子种类的影响相对较小. 在一定浓度范围的一价电解质溶液中, 可见同中心的多层管状囊泡的生长, 而且囊管的长度L与生长时间t的标度关系不因电解质种类和浓度的改变而改变. 随着电解质浓度的增加, 除通常的囊管结构外, 还出现了单螺旋、双螺旋甚至超螺旋的结构.

关键词: 带电膜, 电解质, 心磷脂, 囊管

The effects of electrolytes on the assembling structures of cardiolipin were studied by microscopy. The results show that the assembling structures greatly depend on the concentration and valency of cations, rather than their types or ionic radii. Myelin figures, consisting of concentric cylindrical membranes, appear in the certain concentration range of univalent electrolyte. The kinds and concentration of electrolyte do not influence the scaling relationship between the myelin length L and its growing time t. Besides the normal shape of myelin figures, single, double or even super helixes were found when the electrolyte concentration increased.

Key words: charged membrane, electrolyte, cardiolipin, myelin