Voituriez R, Joanny J F, Prost J
Physicochimie Curie (CNRS-UMR168), Institut Curie, Section de Recherche, 26 rue d'Ulm 75248 Paris Cedex 05 France.
Phys Rev Lett. 2006 Jan 20;96(2):028102. doi: 10.1103/PhysRevLett.96.028102. Epub 2006 Jan 17.
We study theoretically the phase diagram of compressible active polar gels such as the actin network of eukaryotic cells. Using generalized hydrodynamics equations, we perform a linear stability analysis of the uniform states in the case of an infinite bidimensional active gel to obtain the dynamic phase diagram of active polar films. We predict, in particular, modulated flowing phases and a macroscopic phase separation at high activity. This qualitatively accounts for experimental observations of various active systems, such as actomyosin gels, microtubules and kinesins in vitro solutions, or swimming bacterial colonies.
我们从理论上研究了可压缩活性极性凝胶（如真核细胞的肌动蛋白网络）的相图。利用广义流体动力学方程，我们对无限二维活性凝胶情况下的均匀态进行了线性稳定性分析，以获得活性极性薄膜的动态相图。我们特别预测了在高活性下的调制流动相和宏观相分离。这定性地解释了各种活性系统的实验观察结果，如体外溶液中的肌动球蛋白凝胶、微管和驱动蛋白，或游动细菌菌落。
