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相关概念视频

Cryo-electron Microscopy01:28

Cryo-electron Microscopy

4.1K
Conventional electron microscopy (EM) involves dehydration, fixation, and staining of biological samples, which distorts the native state of biological molecules and results in several artifacts. Also, the high-energy electron beam damages the sample and makes it difficult to obtain high-resolution images. These issues can be addressed using cryo-EM, which uses frozen samples and gentler electron beams. The technique was developed by Jacques Dubochet, Joachim Frank, and Richard Henderson, for...
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Electron Microscope Tomography and Single-particle Reconstruction01:07

Electron Microscope Tomography and Single-particle Reconstruction

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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...
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Imaging Biological Samples with Optical Microscopy01:18

Imaging Biological Samples with Optical Microscopy

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Optical microscopy uses optic principles to provide detailed images of samples. Antonie van Leeuwenhoek designed the first compound optical microscope in the 17th century to visualize blood cells, bacteria, and yeast cells. In 1830, Joseph Jackson Lister created an essentially modern light microscope. The 20th century saw the development of microscopes with enhanced magnification and resolution.
In optical microscopy, the specimen to be viewed is placed on a glass slide and clipped on the stage...
8.8K
Transmission Electron Microscopy01:15

Transmission Electron Microscopy

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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...
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Preparation of Samples for Electron Microscopy01:20

Preparation of Samples for Electron Microscopy

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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...
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Updated: Jan 10, 2026

Cryo-Structured Illumination Microscopic Data Collection from Cryogenically Preserved Cells
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cryoJAX:一个在JAX中的冷电子显微镜图像模拟库.

Michael J O'Brien1, David Silva-Sánchez2, Geoffrey Woollard3

  • 1Department of Physics, Harvard University, Cambridge, 02143, MA, USA.

bioRxiv : the preprint server for biology
|November 24, 2025
PubMed
概括
此摘要是机器生成的。

低温电子显微镜 (cryo-EM) 正在扩展超越分子复合体,研究细胞组织. 在JAX上构建的新cryoJAX库提供了一个灵活的框架,用于计算密集的cryo-EM数据分析.

关键词:
自动区分的自动区分.生物物理学的生物物理学.低温电磁冷却仪的使用方法图像模拟图像的模拟软件图书馆 软件图书馆

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Do's and Don'ts of Cryo-electron Microscopy: A Primer on Sample Preparation and High Quality Data Collection for Macromolecular 3D Reconstruction
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科学领域:

  • 结构生物学是结构生物学.
  • 计算生物学是一种计算生物学.
  • 生物物理学的生物物理.

背景情况:

  • 低温电子显微镜 (cryo-EM) 卓越于对生物分子复合物的原子分辨率成像.
  • 化EM的新兴应用包括研究细胞内组织和异质分子状态.
  • 分析这些先进应用程序的冷EM数据带来了重大的计算挑战.

研究的目的:

  • 为了满足先进的冷EM数据分析的计算需求.
  • 开发一个灵活和高效的计算框架,用于冷EM图像模拟和分析.
  • 为了利用JAX科学计算框架进行冷EM数据处理.

主要方法:

  • 在JAX生态系统中开发了cryoJAX,一个cryo-EM图像模拟库.
  • 利用JAX的自动分化和矢量化功能.
  • 创建一个灵活的建模语言,用于冷EM图像形成.

主要成果:

  • CryoJAX提供了一个强大的平台,用于构建计算式冷EM数据分析工具.
  • 该库支持广泛的下游数据分析应用程序.
  • 与JAX的集成有助于开发和部署新的冷EM算法.

结论:

  • CryoJAX增强了cryo-EM的实用性,用于超越分子结构的复杂生物研究.
  • 基于JAX的框架加速了先进的冷EM数据分析方法的开发.
  • CryoJAX已经准备好支持冷EM日益广泛的科学应用.