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| 1 | Entropic force between biomembranes显示文摘Undulation force, an entropic force, stems from thermally excited fluctuations, and plays a key role in the essential interactions between neighboring surfaces of objects. Although the characteristics of the undulation force have been widely studied theoretically and experimentally,the distance dependence of the force, which constitutes its most fundamental characteristic, remains poorly understood.In this paper, first, we obtain a novel expression for the undulation force by employing elasticity and statistical mechanics and prove it to be in good agreement with existing experimental results. Second, we clearly demonstrate that the two representative forms of the undulation force proposed by Helfrich and Freund were respectively the upper and lower bounds of the present expression when the separation between membranes is sufficiently small, which was intrinsically different from the existing results where Helfrich's and Freund's forms of the undulation force were only suitable for the intermediate and small separations. The investigations show that only in a sufficiently small separation does Helfrich's result stand for the undulation force with a large wave number and Freund's result express the force with a small wave number. Finally, a critical acting distance of the undulation force, beyond which the entropic force will rapidly decay approaching zero, is presented. | Long Li Fan Song | 2016 | Acta Mechanica Sinica2016，32，5： | 1 |
| 2 | 细胞膜间的波动力显示文摘由热扰动引起的细胞膜间的波动力调控着大量的生物功能,如细胞黏附、细胞融合、细胞膜结合与解离的转换以及细胞膜的自组装.因此,研究细胞膜间的波动力及其规律是生命科学研究中重要的基础之一.鉴于波动力在大量细胞进程中发挥的重要作用,自其被提出的40年间备受关注.然而,作为当前的研究热点,对于细胞膜波动力的作用规律仍存争论.本文首先简述了细胞膜间的波动力以及相关研究的发展历程;在此基础之上,分别对近期引发争议的两种主要的波动力理论以及目前关于波动力的最新研究进展进行了详述,分析讨论了不同波动力理论的差异,为后续研究提供参考借鉴;最后,总结和展望了该领域的研究热点以及未来研究趋势. | 李龙 宋凡 | 2018 | 力学进展2018，48，1： | 0 |
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