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Citation: LIU Tian-Qing, TANG Yao, YU Ke-Wei. Study on Lecithin/Amino Acid/H₂O Micelle and Liposome Systems by Capacitance Method[J]. Acta Physico-Chimica Sinica, ;2010, 26(02): 311-316. doi: 10.3866/PKU.WHXB20100145 shu

Study on Lecithin/Amino Acid/H₂O Micelle and Liposome Systems by Capacitance Method

1.
School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, Jiangsu Province, P. R. China

Received Date: 1 July 2009
Available Online: 16 December 2009

The structures and properties of lecithin/amino acid/H2O micelle and liposome systems were studied using electrical capacitance. The critical micellar concentration and the liposome formation concentration of lecithin can be obtained from the relation of system capacitance with lecithin's concentration. With an increase in lecithin concentration, the capacitance increases and lecithin aggregates from the micelles to liposomes. With the increase of amino acids, the radii of the micelles and liposomes increase but the capacitance decreases. Amino acids can promote micelle and liposome formation as well as decrease the critical micellar concentration and the formation concentration. The sequence of amino acid influence on the capacitance is as follows: histidine>tryptophan>>glycine.
- Micelle,
- Capacitance,
- Liposome,
- Lecithin,
- Amino acid
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沈阳化工大学材料科学与工程学院沈阳 110142

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通讯作者: 陈斌, bchen63@163.com

Study on Lecithin/Amino Acid/H₂O Micelle and Liposome Systems by Capacitance Method