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相关概念视频

Transmission Electron Microscopy01:15

Transmission Electron Microscopy

5.6K
In 1931, physicist Ernst Ruska—building on the idea that magnetic fields can direct an electron beam just as lenses can direct a beam of light in an optical microscope—developed the first prototype of the electron microscope. This development led to the development of the field of electron microscopy. In the transmission electron microscope (TEM), electrons are produced by a hot tungsten element and accelerated by a potential difference in an electron gun, which gives them up to 400...
5.6K
Electron Microscope Tomography and Single-particle Reconstruction01:07

Electron Microscope Tomography and Single-particle Reconstruction

2.4K
Transmission electron microscopy (TEM) can be used to determine the 3D structure of biological samples with the help of techniques such as electron microscope tomography and single-particle reconstruction. While single-particle reconstruction can examine macromolecules and macromolecular complexes in vitro conditions only, tomography permits the study of cell components or small cells in vivo.
Electron Tomography
Electron tomography can be performed either in TEM or STEM (scanning transmission...
2.4K
Preparation of Samples for Electron Microscopy01:20

Preparation of Samples for Electron Microscopy

5.5K
To be visualized by an electron microscope, either transmission or scanning, biological samples need to be fixed (stabilized) so the electron beam does not destroy them and dried thoroughly (desiccated/dehydrated) so the vacuum does not affect them. Fixation needs to be done as quickly as possible because the sample properties will start changing as soon as it is removed from its natural environment. For example, in a tissue sample, the oxygen levels begin decreasing, causing an altered...
5.5K
Overview of Electron Microscopy01:25

Overview of Electron Microscopy

9.2K
The wavelengths of visible light ultimately limit the maximum theoretical resolution of images created by light microscopes. Most light microscopes can only magnify 1000X, and a few can magnify up to 1500X. Electrons, like electromagnetic radiation, can behave like waves, but with wavelengths of 0.005 nm, they produce significantly greater resolution up to 0.05 nm as compared to 500 nm for visible light. An electron microscope (EM) can create a sharp image that is magnified up to 2,000,000X.
9.2K

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相关实验视频

Updated: Jul 18, 2025

Sample Preparation and Experimental Design for In Situ Multi-Beam Transmission Electron Microscopy Irradiation Experiments
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Sample Preparation and Experimental Design for In Situ Multi-Beam Transmission Electron Microscopy Irradiation Experiments

Published on: June 27, 2022

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方形梁用于TEM中最佳地.

Eugene Yd Chua1, Lambertus M Alink1, Mykhailo Kopylov1

  • 1Simons Electron Microscopy Center, New York Structural Biology Center, New York, NY 10027.

Research square
|August 23, 2023
PubMed
概括
此摘要是机器生成的。

用于传输电子显微镜的新型正方形电子束使得用于大视野成像的完美造成为可能. 这一创新改进了剂量敏感的冷电子显微镜 (cryo-EM) 成像,具有可比分辨率.

科学领域:

  • 显微镜和成像技术技术.
  • 结构生物学 结构生物学
关键词:
这就是TEMEM.在TEM地板.低温电磁波冷却器 (Cryo-EM) 是一个非常好的方法.方形梁的正方形梁是一个方形梁.

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Sample Preparation by 3D-Correlative Focused Ion Beam Milling for High-Resolution Cryo-Electron Tomography
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Single Particle Electron Microscopy Reconstruction of the Exosome Complex Using the Random Conical Tilt Method
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Single Particle Electron Microscopy Reconstruction of the Exosome Complex Using the Random Conical Tilt Method

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相关实验视频

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Sample Preparation and Experimental Design for In Situ Multi-Beam Transmission Electron Microscopy Irradiation Experiments
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Sample Preparation and Experimental Design for In Situ Multi-Beam Transmission Electron Microscopy Irradiation Experiments

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Sample Preparation by 3D-Correlative Focused Ion Beam Milling for High-Resolution Cryo-Electron Tomography
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Sample Preparation by 3D-Correlative Focused Ion Beam Milling for High-Resolution Cryo-Electron Tomography

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Single Particle Electron Microscopy Reconstruction of the Exosome Complex Using the Random Conical Tilt Method
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Single Particle Electron Microscopy Reconstruction of the Exosome Complex Using the Random Conical Tilt Method

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  • 材料科学 材料科学 材料科学

    • 背景情况:

    • 在传输电子显微镜 (TEM) 中大面积的高放大成像需要图像.
    • 采用圆形电子束的传统TEM与不完善的和不均的曝光作斗争,对于剂量敏感样本来说尤其有问题.
    • 现有的制方法在实现均照明和高分辨率数据采集方面存在局限性.

    结论:

    • 可改装的正方形电子束为TEM中大场成像提供了显著的进步.
    • 它提供了一种实用的解决方案,以实现均的照明和提高冷电磁波中的数据质量.
    • 这一创新增强了TEM用于高分辨率结构和材料分析的实用性.