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Actin filaments undergo polymerization and depolymerization from either end. The polymerization and depolymerization rates depend on the cytosolic concentration of free G-actins. The polymerization rate is generally higher at the plus or barbed end, while the depolymerization rate is higher at the minus or pointed end. At a steady state, critical concentration describes the concentration of free G-actin monomers at which the polymerization rate at the plus end is equal to that of the...
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在二维活跃的布朗系统中,相互作用驱动的结构形态和运动.

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此摘要是机器生成的。

活跃的布朗粒子中的吸引相互作用导致了新的非单调的排序. 从吸引到活动主导的关键过渡推动了这些系统中复杂的结构变化和独特的动态阶段.

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科学领域:

  • 非平衡物理学的物理学.
  • 软物质物理学 软物质物理学
  • 活性物质系统的活性物质系统

背景情况:

  • 具有排斥性相互作用的球形活性布朗粒子 (ABP) 已被很好地理解.
  • 在ABP中吸引互动的作用仍然是一个开放的研究领域.
  • 传统的活性物质行为通常以运动性诱导的相分离为特征.

研究的目的:

  • 在具有有吸引力的相互作用的2D系统中研究结构形态和粒子速度.
  • 探索吸引力和粒子活动之间的竞争.
  • 了解Péclet数和包装分数对系统行为的影响.

主要方法:

  • 活跃的布朗粒子的计算机模拟.
  • 佩克莱特数 (活动水平) 的系统变化.
  • 包装分量的系统变化 (颗粒密度).

主要成果:

  • 发现了结构和速度排序的新型非单调进化.
  • 确定了从吸引力主导到活动主导的制度的关键转变.
  • 揭示了拓缺陷,空间结构和粒子运动之间的相关性.

结论:

  • 吸引力对传统模型之外的活性物质有很大的影响.
  • 拓缺陷调解了结构秩序和速度对齐之间的相互作用.
  • 这些发现为控制活性材料的集体行为提供了新的框架.