活性极性膜的通用phase diagram
Generic phase diagram of active polar films
摘要：
我们从理论上研究了可压缩活性极性凝胶的相图，如真核细胞的肌动蛋白网络。利用广义流体力学方程，对二维活性凝胶的均匀状态进行线性稳定性分析，得到活性极性膜的动态相图。我们预测特别调制的流动相，和宏观相分离在高活性。这定性地解释了各种活性系统的实验观察，如肌动蛋白-肌球蛋白凝胶、微管和驱动蛋白的体外溶液或游动细菌菌落。
英文摘要：
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 acto-myosin gels, microtubules and kinesins in vitro solutions, or swimming bacterial colonies.
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