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相关概念视频

Strain and Elastic Modulus01:15

Strain and Elastic Modulus

The quantity that describes the deformation of a body under stress is known as strain. Strain is given as a fractional change in either length, volume, or geometry under tensile, volume (also known as bulk), or shear stress, respectively, and is a dimensionless quantity. The strain experienced by a body under tensile or compressive stress is called tensile or compressive strain, respectively. In contrast, the strain experienced under bulk stress and shear stress is known as volume and shear...
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Dynamic Modulus of Elasticity of Concrete

The dynamic modulus of elasticity assesses how a concrete structure deforms under impact or dynamic loads. It is typically higher than the static modulus of elasticity, measured under slow, steady loading conditions.
The sonic test is a common method to determine the dynamic modulus. In this test, a concrete beam, sized either 6 x 6 x 30 inches or 4 x 4 x 20 inches, is clamped at its center. Vibrations are initiated at one end of the beam by an electromagnetic exciter unit powered by a...

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弹性模块与MDCK表皮单层中的细胞包装密度相比.

Steven J Chisolm1, Emily Guo2, Vignesh Subramaniam1

  • 1Department of Mechanical and Aerospace Engineering, University of Florida, Gainesville, FL 32605, United States.

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|March 29, 2025
PubMed
概括

马丁·达比犬 (MDCK) 细胞单层的弹性模量随着细胞密度在低密度的增加而下降,然后在高密度的高原. 这一发现影响了对组织力学和细胞行为的理解.

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科学领域:

  • 生物物理学的生物物理.
  • 细胞生物学 细胞生物学
  • 组织工程是组织工程.

背景情况:

  • 组织弹性模块是健康和功能的指标.
  • 表皮单层作为研究组织力学的最小模型.
  • 细胞包装密度是影响组织机械性能的关键因素.

研究的目的:

  • 研究Madin Darby犬 (MDCK) 细胞单层的弹性模量与它们的包装密度之间的关系.
  • 要在多细胞尺度上描述单层弹性,而不是亚细胞尺度.

主要方法:

  • 使用微缩水系统,对MDCK单层的顶端施加温和的力.
  • 在每次实验中,对大约100个细胞施加正常力,以测量弹性模量.
  • 标志着单层为一个薄的弹性板块.

主要成果:

  • 在低密度的汇合单层中,随着细胞密度的增加,弹性模量下降.
  • 在高细胞密度下,弹性模量似乎平稳.
  • 弹性是在多细胞尺度上测量.

结论:

  • 细胞包装密度显著影响MDCK细胞单层的弹性模量.
  • 这些发现为表皮组织中的集体行为提供了见解.
  • 这项研究有助于理解细胞包装密度与细胞运动相关的组织.