Shear Banding in an F-Actin Solution
Shear Banding in an F-Actin Solution
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DOI：
10.1103/physrevlett.109.248303
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发表时间：
2012-12-10
影响因子：
8.6
通讯作者：
Nakagaki, Toshiyuki
中科院分区：
文献类型：
--
作者：
Kunita, Itsuki;Sato, Katsuhiko;Nakagaki, Toshiyuki
我们在此报告的第一个证据表明，F-肌动蛋白的解决方案显示剪切带，其特征在于自发分离的均匀剪切流到两个宏观领域的不同的明确的剪切速率。在F-肌动蛋白溶液中观察到的恒定的剪切应力解释的带状流的体积分数，遵守杠杆规则。在F-肌动蛋白溶液中观察到不均匀的可逆流动，相对于剪切速率的向上和向下变化。这是第一次在一个简单的生物大分子中观察到剪切带。剪切流速度特征模式的生物学意义和动力学方面进行了讨论。
We report herein the first evidence that an F-actin solution shows shear banding, which is characterized by the spontaneous separation of homogeneous shear flow into two macroscopic domains of different definite shear rates. The constant shear stress observed in the F-actin solution is explained by the banded flow with volume fractions that obey the lever rule. Nonhomogenous reversible flows were observed in the F-actin solution with respect to upward and downward changes in the shear rate. This is the first time shear banding has been observed in a simple biomacromolecule. The biological implications and dynamic aspects of shear flow velocity characteristic patterns are discussed.