Anomalous behavior of the DNA liquid-crystalline dispersion particles and their phases

被引：11
|
作者：
Yevdokimov, Yuri M. [1 ]
Skuridin, Sergey G. [1 ]
Salyanov, Viktor, I [1 ]
Kats, Efim, I [2 ]
机构：
[1] Russian Acad Sci, Engelhardt Inst Mol Biol, Vavilova St 32, Moscow 119991, Russia
[2] Russian Acad Sci, Landau Inst Theoret Phys, Kosygina St 2, Moscow 119334, Russia
来源：
CHEMICAL PHYSICS LETTERS | 2018年 / 707卷
基金：
俄罗斯科学基金会;
关键词：
ds DNA; Liquid-crystalline dispersions of DNA; Circular dichroism spectra; Liquid-crystalline phases of DNA; Optical textures; Hexagonal and cholesteric packing of DNA; Phase transitions; REENTRANT CHOLESTERIC PHASE; CIRCULAR-DICHROISM; TRANSITION; MOLECULES; PITCH;
D O I：
10.1016/j.cplett.2018.07.028
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The dispersions were obtained as a result of phase exclusion of the DNA molecules from aqueous-salt-PEG-containing solutions. The CD spectra have shown cholesteric and hexagonal packing of the DNA in single dispersion particles at room temperature. The phase transition of the hexagonal -> the "re-entrant" cholesteric packing of DNA takes place at elevated temperature. The texture of the "re-entrant" phase does not demonstrate attributes of DNA cholesteric phase. Alternative reasons of such discrepancy are discussed in the presented Letter. (C) 2018 Published by Elsevier B.V.
引用
收藏
页码：154 / 159
页数：6
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