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相关概念视频

The Contractile Ring02:15

The Contractile Ring

Contractile rings are composed of microfilaments and are responsible for separating the daughter cells during cytokinesis. Contractile ring assembly proceeds along with other cell cycle events; however, very few mechanistic details are known about the timing and coordination of the contractile rings with the cell cycle.
A small GTPase, RhoA, controls the function and assembly of the contractile ring. RhoA belongs to the Ras superfamily of proteins. The activation of formins by RhoA promotes...
Cell-matrix's Response to Mechanical Forces01:13

Cell-matrix's Response to Mechanical Forces

In animal cells, the extracellular matrix allows cells within tissues to withstand external stresses and transmits signals from the outside of the cell to the inside. The extracellular matrix is extensive, and its composition varies between different types of tissues. For example, the reticular fibers and ground substance make up the ECM in loose connective tissue, while collagen and bone minerals make up the ECM of bone tissue. 
Anchoring junctions mechanically attach a cell to the...

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相关实验视频

Updated: Jun 23, 2026

Fabricating Metamaterials Using the Fiber Drawing Method
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具有可调节的机械性能的可自动部署的收缩绳元材料.

Wenzhong Yan1,2, Talmage Jones2, Christopher L Jawetz2,3

  • 1Electrical and Computer Engineering Department, UCLA, USA. wzyan24@g.ucla.edu.

Materials horizons
|July 15, 2024
PubMed
概括

这项研究提出了一种新的设计,用于由推动木偶启发的自动部署的元材料. 这些材料在部署后提供可连续调节的刚性和阻尼,使机器人和工程领域的新应用成为可能.

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Last Updated: Jun 23, 2026

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科学领域:

  • 材料科学 材料科学 材料科学
  • 机械工程 机械工程
  • 机器人技术 机器人技术 机器人技术

背景情况:

  • 最近在活性材料和制造方面的进步使可自行部署的元材料成为可能.
  • 设计具有可调节后部署机械性能的超材料仍然是一个重大挑战.

研究的目的:

  • 引入一个有效的设计策略,用于可逆自动部署的超材料.
  • 为了实现可连续调节的部署后硬度和阻尼.

主要方法:

  • 灵感来自推动人偶,使用收缩执行器和带有形接口的珠子开发了一种超材料设计.
  • 网络在启动时自组装成预编程的配置.
  • 执行器收缩通过粒子干扰动态调整机械性能.

主要成果:

  • 在部署后,超材料表现出持续调节的刚性 (超过35倍的增强) 和减 (超过50%的变化).
  • 由珠子的形角度引入的几何非线性显著影响了部署性和可调性.
  • 结构保持整体完整性,在机械性能调整期间变化最小.

结论:

  • 拟议的设计提供了一条可逆自部署,轻量级和可调节的超材料的途径.
  • 潜在的应用包括软机器人,可重新配置的架构和太空工程.
  • 该研究强调了几何非线性在元材料设计中的重要性.