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相关概念视频

Faraday Disk Dynamo01:23

Faraday Disk Dynamo

A Faraday disk dynamo is a DC generator, producing an emf that is constant in time. It consists of a conducting disk that rotates with a constant angular velocity in the magnetic field, perpendicular to the disk's plane. The rotation of the disk causes a change in magnetic flux, which induces an emf, causing opposite charges to develop on the rim and in the center of the disk. The polarity of the induced emf can be determined by the direction of the magnetic field and the direction of the...
Induced Electric Fields: Applications01:27

Induced Electric Fields: Applications

An important distinction exists between the electric field induced by a changing magnetic field and the electrostatic field produced by a fixed charge distribution. Specifically, the induced electric field is nonconservative because it does not work in moving a charge over a closed path. In contrast, the electrostatic field is conservative and does no net work over a closed path. Hence, electric potential can be associated with the electrostatic field but not the induced field. The following...
P-N junction01:11

P-N junction

A p-n junction is formed when p-type and n-type semiconductor materials are joined together. At the interface of the p-n junction, holes from the p-side and electrons from the n-side begin to diffuse into the opposite sides due to the concentration gradient. This diffusion of carriers leads to a region around the junction where there are no free charge carriers, known as the depletion region. The charge density within the depletion region for the n-side and p-side can be described by the...
The Electrical Double Layer01:30

The Electrical Double Layer

In the region where two bulk phases meet, an intricate electric charge distribution arises due to charge transfer, ion adsorption, molecular orientation, and charge distortion. This complex distribution is commonly referred to as the electrical double layer.When a solid electrode interfaces with ions in an electrolyte solution, the speed of electron transfer dictates the rates of oxidation and reduction. The electrode acquires a charge through the escape of atoms into the solution as cations or...

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相关实验视频

Updated: Jun 19, 2026

High efficiency, Site-specific Transfection of Adherent Cells with siRNA Using Microelectrode Arrays MEA
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开发具有局部电穿孔功能的专用微电极阵列.

Andrea Kauth1, Anne-Kathrin Mildner2, Lena Hegel1

  • 1Institute of Materials in Electrical Engineering 1, RWTH Aachen University, Sommerfeldstr. 18-24, 52074, Aachen, Germany.

Annals of biomedical engineering
|June 16, 2023
PubMed
概括

研究人员开发了专门的微电极阵列 (MEAs),用于细胞中精确的基因电转移 (GET). 这种技术使用局部电场,以高空间分辨率高效地传递基因.

关键词:
电穿透电气化 电穿透电气化基因电转移是基因的电转移.微型和纳米系统转化 转化 转化 转化

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科学领域:

  • 生物技术是生物技术.
  • 细胞生物学 细胞生物学
  • 生物工程是生物工程.

背景情况:

  • 脉冲电场诱导电透 (EP),允许生物分子进入细胞.
  • 基因电转移 (GET) 使用EP通过等离子体DNA传递治疗基因.
  • 微/纳米技术为EP和GET提供了增强的空间分辨率和较低的电压,与散装方法相比.

研究的目的:

  • 开发和表征一种专门的微电极阵列 (MEA) 用于局部电透化 (EP) 的附着细胞.
  • 为了证明MEAs对高空间分辨率的基因电转移 (GET) 的实用性.

主要方法:

  • 用灵活的电极和基板材料选择制造专门的MEA.
  • 电化学阻抗光谱学以描述带有和没有附着细胞的MEA阻抗.
  • 在人类胚胎脏293T细胞中使用光色剂验证局部EP.
  • 通过测量随后的绿色光蛋白表达来证明GET.

主要成果:

  • 开发的MEA使附着细胞的局部EP成为可能.
  • 电化学阻抗光谱证实了细胞层对MEA阻抗的影响.
  • 成功地将光剂染料输入细胞,验证了EP的功能.
  • 基因电转移成功地被证明,导致可观察到的绿色光蛋白表达.

结论:

  • 专门的MEA是实现高空间分辨率的有效工具.
  • 灵活的制造过程允许为特定的蜂应用量身定制的MEA设计.
  • 这种基于MEA的方法为本地化和高效的基因传递提供了一个有希望的平台.