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    Please use this identifier to cite or link to this item: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/27711


    Title: On the asymmetric elasticity of twisted dsDNA
    Authors: 周子聰;Zhou, Zi-cong;黎璧賢;Lai, Pik-yi
    Contributors: 淡江大學物理學系
    Keywords: Biopolymer;dsDNA;Elasticity
    Date: 2005-05-01
    Issue Date: 2009-12-31 10:39:16 (UTC+8)
    Publisher: Elsevier
    Abstract: We present an analytical-based proof for the consistency of two asymmetric elastic models of the double-stranded DNA in the regime around the B -form. We derive the shape equations in terms of Euler angles for a uniform ribbon with noncircular cross section and spontaneous torsion. We study the conditions to form a helical ribbon for the model and find that the Euler angle ψψ must be either 0 or π/2π/2. We find that the helix is always stable or at least metastable for the model, and there is either a continuous or discontinuous transition of extension, from a twisted straight ribbon to a helical ribbon. An “over-collapse” phenomena of extension is observed for the ribbon under twisting. The stability of the helix and the intrinsic asymmetric elasticity under twisting are also studied.
    Relation: Physica A: Statistical Mechanics and its Applications 350(1), pp.70-83
    DOI: 10.1016/j.physa.2004.11.031
    Appears in Collections:[物理學系暨研究所] 期刊論文

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