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相关概念视频

Applications of EMF Measurements01:26

Applications of EMF Measurements

Electromotive force (EMF) measurements have a broad range of applications in various fields, including chemistry and physics. The electrochemical series, an arrangement of elements in order of their standard electrode potentials, can be determined through EMF measurements. Elements with lower standard potentials can reduce ions of elements with higher standard potentials.The standard cell potential, E°, allows for the calculation of the standard reaction Gibbs energy, ΔG°, and the equilibrium...

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Multiplexed Single-molecule Force Proteolysis Measurements Using Magnetic Tweezers
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使用电磁子进行强力光谱学.

Joseph G Piccolo1, Joshua Méndez Harper2, Derrica McCalla1

  • 1Department of Physics, Emory University, 400 Dowman Dr., Atlanta, Georgia 30322, USA.

Journal of applied physics
|April 29, 2024
PubMed
概括

我们开发了一种低成本的电磁 tweezer 系统,用于单分子生物物理学. 这种可访问的磁 (MT) 设计使得精确的力控制可用于研究DNA电机酶和聚合物动力学.

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Magnetic Tweezers for the Measurement of Twist and Torque
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科学领域:

  • 生物物理学的生物物理.
  • 单分子操纵的操作方法
  • 聚合物物理 聚合物物理

背景情况:

  • 磁子 (MTs) 对于探测单聚合物的物理性质至关重要.
  • 传统的MT使用永久磁铁,这可能是昂贵的,并引入振动.
  • 对于生物物理研究来说,更快的力调制和减少振动是可取的.

研究的目的:

  • 描述一个低成本的,固态电磁 tweezer 设计.
  • 为了能够精确地操纵DNA连接的珠子,用于生物物理研究.
  • 为本科教育和研究提供一个可访问的工具.

主要方法:

  • 使用四极电磁设计来产生力.
  • 操纵了与DNA连接的MyOne偏磁珠.
  • 通过调制磁场达到高达15 pN的力量.

主要成果:

  • 展示了一种低成本的电磁 tweezer 系统.
  • 在精确的控制下产生高达15 pN的力.
  • 固态设计允许双轴场调制.

结论:

  • 开发的电磁子是一个具有成本效益且易于使用的工具.
  • 能够研究DNA电机酶和聚合物动态.
  • 适用于生物物理研究和本科教育.