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    題名: On the asymmetric elasticity of twisted dsDNA
    作者: 周子聰;Zhou, Zi-cong;黎璧賢;Lai, Pik-yi
    貢獻者: 淡江大學物理學系
    關鍵詞: Biopolymer;dsDNA;Elasticity
    日期: 2005-05-01
    上傳時間: 2009-12-31 10:39:16 (UTC+8)
    出版者: Elsevier
    摘要: 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.
    關聯: Physica A: Statistical Mechanics and its Applications 350(1), pp.70-83
    DOI: 10.1016/j.physa.2004.11.031
    顯示於類別:[物理學系暨研究所] 期刊論文

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