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题名: Maximum-entropy calculation of the end-to-end distance distribution of force-stretched chains
作者: Dai, LR ;  Liu, F ;  Ou-Yang, ZC
刊名: JOURNAL OF CHEMICAL PHYSICS
出版日期: 2003
卷号: 119, 期号:15, 页码:8124-8132
关键词: STRANDED-DNA-MOLECULES ;  POLYMER-MOLECULES ;  THERMODYNAMICS ;  MOMENTS
学科分类: Physics
通讯作者: Dai, LR , Chinese Acad Sci, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China.
部门归属: Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China; Tsing Hua Univ, Ctr Adv Study, Beijing 100084, Peoples R China
英文摘要: Using the maximum-entropy method, we calculate the end-to-end distance distribution of the force-stretched chain from the moments of the distribution, which can be obtained from the extension-force curves measured in single-molecule experiments. If one knows the force expansion of the extension through the (n-1)th power of a force, that is enough to calculate the n moments of the distribution. We examine the method with three force-stretched chain models: the Gaussian chain, free-joined chain, and self-avoiding chain on a two-dimensional lattice. The method reconstructs all distributions precisely. We also apply the method to force-stretched complex chain molecules: the hairpin and secondary structure conformations. We find that the distributions of homogeneous chains of the two conformational classes are quite different: there are two independent peaks in the hairpin distribution, while only one peak is observed in the distribution of secondary structure conformations. Our discussion shows that the end-to-end distance distribution, instead of extension-force curves, can reveal more important physical information. (C) 2003 American Institute of Physics.
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000185703100057
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/13204
Appears in Collections:理论物理所1978-2010年知识产出_期刊论文

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Recommended Citation:
Dai, LR,Liu, F,Ou-Yang, ZC. Maximum-entropy calculation of the end-to-end distance distribution of force-stretched chains[J]. JOURNAL OF CHEMICAL PHYSICS,2003,119(15):8124-8132.
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