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相关概念视频

Shearing Stress01:18

Shearing Stress

Shearing stress, denoted by the Greek letter tau (τ), is stress caused by forces acting transversely on an object. These forces create internal ones within the entity in the plane where the external forces are applied. The resultant of these internal forces is the shear in the section.
The average shearing stress can be calculated by dividing the shear by the area of the cross-section.
Elastic Strain Energy for Shearing Stresses01:20

Elastic Strain Energy for Shearing Stresses

As discussed in previous lessons, strain energy in a material is the energy stored when it is elastically deformed, a concept crucial in materials science and mechanical engineering. This energy results from the internal work done against the cohesive forces within the material. When a material undergoes shearing stress and corresponding shearing strain, the strain energy density, which is the energy stored per unit volume, is calculated. Within the elastic limit, where the stress is...

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相关实验视频

Updated: Jul 11, 2026

Using a Microfluidics Device for Mechanical Stimulation and High Resolution Imaging of C. elegans
10:39

Using a Microfluidics Device for Mechanical Stimulation and High Resolution Imaging of C. elegans

Published on: February 19, 2018

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在C. elegans中感知剪切应力.

Zhiyong Zhang1, Xia Li2, Can Wang3

  • 1College of Life Science and Technology, Key Laboratory of Molecular Biophysics of MOE, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China; Life Sciences Institute, Ann Arbor, MI, USA; Department of Molecular and Integrative Physiology, University of Michigan, Ann Arbor, MI 48109, USA.

Current biology : CB
|October 29, 2024
PubMed
概括
此摘要是机器生成的。

线虫虫,C. elegans,通过感知剪切应力来导航外部液体流. 这种反应是由特定的神经元和分子通路介导的,这使得C. elegans成为机械感应研究的模型.

关键词:
动脉样硬化 动脉样硬化传感流动 传感流动机械机械机械 机械机械机械生物学 机械生物学机械传感器是一种机械传感器.机械传导 机械传导剪切力是一种剪切力.触摸 触摸 触摸 触摸 触摸 触摸

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科学领域:

  • 机械生物学 机械生物学
  • 神经科学是一个神经科学.
  • 动物行为 动物行为

背景情况:

  • 剪切应力感应对动物生理学至关重要,特别是在血管系统中.
  • 对动物体内的外部环境剪切应力感应的理解仍然有限.

研究的目的:

  • 调查C. elegans (C. elegans) 如何感知并响应流体流动的外部剪切应力.
  • 为了阐明神经和分子机制背后的剪切压力诱导的行为在C. elegans.

主要方法:

  • 行为测试追踪C.elegans对流体流动的反应.
  • 在C. elegans中记录神经活动和基因操纵.
  • 分子路径分析涉及G蛋白信号传递和循环核酸入 (CNG) 通道.

主要成果:

  • C. elegans对外部流体流动表现出行为反应,帮助导航.
  • AWC,ASH和ASER神经元是关键的剪切应力传感器,AWC是关键的.
  • 剪切应激通过AWC中的G蛋白信号传递和cGMP转化,激活神经元激发的CNG通道.

结论:

  • C. elegans有效地感知并响应外部剪切应力.
  • 这项研究描述了C. elegans中剪切应激感觉的神经电路和分子机制.
  • C. elegans 作为一种有价值的遗传模型,用于研究剪切应力机械感应.