STRUCTURAL TRANSITION IN A LIPID-WATER LIQUID SYSTEM

被引：0
|
作者：
Bulavin, L. A. [1 ]
Solov'ev, D. V. [1 ,2 ]
Gorshkova, Yu. E. [2 ]
Zhigunov, A. N. [3 ]
Ivan'kov, O. I. [1 ,2 ]
Gordelii, V. I. [2 ,4 ,5 ,6 ]
Kuklin, O. I. [2 ,4 ]
机构：
[1] Taras Shevchenko Natl Univ Kyiv, 4 Acad Glushkov Ave, UA-03022 Kiev, Ukraine
[2] Joint Inst Nucl Res, Dubna 141980, Russia
[3] Acad Sci Czech Republ, Inst Macromol Chem, Prague 2162 06 6, Czech Republic
[4] Moscow Inst Phys & Technol, Res & Educ Ctr Bionanophys, Dolgoprudnyi 141700, Russia
[5] Inst Biol Struct JP Ebel, F-38027 Grenoble 1, France
[6] Inst Complex Syst, D-52428 Julich, Germany
来源：
UKRAINIAN JOURNAL OF PHYSICS | 2012年 / 57卷 / 06期
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D O I：
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中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Small-angle X-ray scattering technique has been used to study multilayer lipid membranes of 1,2-dipalmitoyl-sn-glycero-3-phosphocholine (DPPC) and the 3: 1-mixture DPPC/1-palmitoyl-2-oleoyl-sn-glycero-3-phosphocholine (POPC) in excess water. The temperature dependences of the repetition period for lipid bilayers in the temperature range 20-55 degrees C are obtained. A comparative analysis of the scattering curves obtained for multilayer membranes showed that, below a temperature of 40 degrees C, there emerges an additional ordering with a repetition period of 66 angstrom in the lipid mixture, which we associate with the lipid phase separation. A disappearance of the so-called ripple (wave-like) phase of DPPC lipid in the mixture is also observed.
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页码：623 / 627
页数：5
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