计算物理 ›› 2013, Vol. 30 ›› Issue (4): 565-570.

• 论文 • 上一篇    下一篇

基于冲击力模型的分子马达动力学分析

李晨璞1, 韩英荣2, 展永2, 胡金江1, 谢革英1, 张礼刚1,3, 范虹1   

  1. 1. 河北建筑工程学院数理系, 河北 张家口 075000;
    2. 河北工业大学理学院, 天津 300130;
    3. 北京交通大学理学院, 北京 100044
  • 收稿日期:2012-09-28 修回日期:2012-12-08 出版日期:2013-07-25 发布日期:2013-07-25
  • 作者简介:李晨璞,(1979-),男,硕士,讲师,主要从事统计物理,分子马达动力学研究,E-mail:lcpedu@yahoo.com.cn
  • 基金资助:
    河北省教育厅高等学校科学技术研究(Z2012175);张家口市科学技术研究(1101006B)资助项目

Molecular Motor Dynamics in Impact Force Model

LI Chenpu1, HAN Yingrong2, ZHAN Yong2, HU Jinjiang1, XIE Geying1, ZHANG Ligang1,3, FAN Hong1   

  1. 1. Hebei University of Architecture, Zhangjiakou, Hebei 075000, China;
    2. School of Science, Hebei University of Technology, Tianjin 300401, China;
    3. School of Science, Beijing Jiaotong University, Beijing 100044, China
  • Received:2012-09-28 Revised:2012-12-08 Online:2013-07-25 Published:2013-07-25

摘要: 从分子马达输运特点和实验现象出发,建立满足朗之万方程的冲击力模型,分析分子马达定向输运的动力学行为.研究发现:在合适的冲击力和噪声强度的共同作用下,分子马达可以稳定的梯跳跃迁运动和有效的输运;分子马达在轨运动的方向由冲击力的方向决定;另外,虽然在不同的噪声强度时平均速度都不为零,但是整个分子马达系综的高效输运对噪声强度有一定的选择性;系综的平均速度随着负载力的增大而减小,甚至会产生反方向的运动.

关键词: 分子马达, 冲击力, 朗之万方程, 噪声强度

Abstract: With transport characteristics and experiment about molecular motor,an impact force model is established,which conforms Langevin equation.Kinetics of molecular motor transport is analyzed.Molecular motors could take stable stepping motion and effective transport in right impact force combined with noise intensity.Direction of motion of molecular motor is adjusted by direction of impulse force.Though average speed is not zero at different noise intensity,efficient transport of molecular motor ensemble indicates that the system is selective on noise intensity.Average speed of molecular motor ensemble decreases with increasing of load force,the motion even changes its direction as load force is great enough.

Key words: molecular motor, impact force, langevin equation, noise intensity

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