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相关概念视频

Tension Response at Adherens Junctions01:26

Tension Response at Adherens Junctions

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The adherens junctions that anchor cells together are multi-protein complexes that dynamically adapt to mechanical stimuli such as tensile forces and shear stress. Mechanosensory proteins in these junctions can sense such mechanical stimuli and undergo a shift in their conformation, resulting in an altered function — a process called mechanotransduction.
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Adherens Junctions01:24

Adherens Junctions

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Strong contact points between adjacent cells anchor them to each other, forming tissues. Such anchoring junctions are of two types –  adherens junctions and desmosomes. Adherens junctions are abundant in tissues such as  epithelium and endothelium, forming a continuous zone of adhesion called the adhesion belt. In other tissues, such as  heart muscle, they appear as clusters, linking the cells to produce coordinated heart muscle contraction.
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Intracellular Signaling Affects Focal Adhesions01:17

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Integrins act both as extracellular input receivers and as intracellular processing activators. As their name suggests, integrins are entirely integrated into the membrane structure. Their hydrophobic membrane-spanning regions interact with the phospholipid bilayer's hydrophobic region. These membrane receptors provide extracellular attachment sites for effectors like hormones and growth factors. They activate intracellular response cascades when their effectors are bound and active.
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Cells migrating in response to external stimuli form lamellipodia, which are thin membrane protrusions supported by a mesh of linked, branched, or unbranched actin filaments. These actin filaments interact with myosin motor proteins, creating the dynamic actomyosin complex within the cytoskeleton. Contractility, or the ability to generate contractile stress, is inherent to the actomyosin complex. It helps cells detect the stiffness of the surrounding ECM and exert contractile force for...
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Simultaneously Capturing Real-time Images in Two Emission Channels Using a Dual Camera Emission Splitting System: Applications to Cell Adhesion
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通过连续相位切换粘附来实现动态捕获.

Ruozhang Li1, Dongwu Li2, Wenbo Li3

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概括
此摘要是机器生成的。

本研究介绍了一种使用形状记忆聚合物 (SMP) 进行动态物体捕获的新型粘合策略. 基于SMP的系统有效地分散能量,并在撞击时增强,使航空航天应用中能够进行强大的捕获.

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科学领域:

  • 材料科学 材料科学 材料科学
  • 航空航天工程 航空航天工程
  • 机器人技术 机器人技术 机器人技术

背景情况:

  • 可控制的粘合接口对于动态物体捕获至关重要,特别是在航空航天领域.
  • 现有的方法在有效的冲击能量消耗和反弹期间的快速接口保护方面扎.
  • 复杂的机械和控制系统通常需要用于多功能粘合剂应用.

研究的目的:

  • 为全周期捕获作业提出一种新的顺序相位切换粘附策略.
  • 利用形状记忆聚合物 (SMPs) 来提高能量消耗和接口强化.
  • 为了证明强大的动态捕获,操纵和释放能力.

主要方法:

  • 设计了一种SMP框架粘合结构,能够进行连续相位切换.
  • 利用SMPs的内在粘性弹性进行能量消散和增强.
  • 测试了系统在自由浮动条件下捕获高动能目标的性能.

主要成果:

  • 在SMP框架粘合剂捕获的目标与正常化动能超过3800J/m2.2.
  • 材料的粘弹性提供了强大的能量消散和快速的接口强化.
  • 动态增强机制有效地延迟了裂的传播,并抑制了反弹.

结论:

  • 顺序相位切换粘附策略为高动态环境中强大的多功能捕获提供了一个范式.
  • 基于SMP的系统成功执行了动态捕获,操纵和释放.
  • 这种方法提高了脱落性和反弹抑制,用于航空航天应用.