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相关概念视频

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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Scanning Electron Microscopy01:07

Scanning Electron Microscopy

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A scanning electron microscope (SEM) is used to study the surface features of a sample by using an electron beam that scans the sample surface in a two-dimensional manner. Typically, areas between ~1 centimeter to 5 micrometers in width can be imaged. SEM can be used to image bacteria, viruses, tissues as well as larger samples like insects. Conventional SEM gives a magnification ranging from 20X to 30,000X and spatial resolution of 50 to 100 nanometers.
Fundamental Principles
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相关实验视频

Updated: Jun 27, 2025

Visualization of Germinosomes and the Inner Membrane in Bacillus subtilis Spores
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评估用于扫描电子显微镜的细菌子制备方法.

Dmitry Malyshev1, Cheng Choo Lee2, Magnus Andersson1,3

  • 1Department of Physics, Umeå University, Linnaeus Väg, Umeå 901 87, Sweden.

Microscopy and microanalysis : the official journal of Microscopy Society of America, Microbeam Analysis Society, Microscopical Society of Canada
|May 3, 2024
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概括
此摘要是机器生成的。

这项研究优化了用于扫描电子显微镜 (SEM) 的细菌子准备,揭示了诸如exosporium和 pili.等关键细节. 结果确定了细菌子的SEM成像的最佳实践,增强了结构分析.

关键词:
哈拉利克看起来很糟糕.这就是SEM SEM.细菌杆菌是一种固定剂 固定剂是指固定剂.质地 质地 质地

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Scanning Electron Microscopy SEM Protocols for Problematic Plant, Oomycete, and Fungal Samples
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Preparation of Prokaryotic and Eukaryotic Organisms Using Chemical Drying for Morphological Analysis in Scanning Electron Microscopy SEM
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科学领域:

  • 微生物学 微生物学
  • 显微镜的使用方法
  • 生物物理学的生物物理.

背景情况:

  • 扫描电子显微镜 (SEM) 可视化细菌子的超结构,这对于理解生命力和环境反应至关重要.
  • 样本准备显著影响SEM图像质量,分辨率和特征可见性.

研究的目的:

  • 为了比较各种细菌子制备方法用于SEM成像.
  • 为了确定最佳的协议,平衡准备时间,特征保存 (exosporium, pili) 和图像质量.

主要方法:

  • 利用Bacillus anthracis子作为一个模型生物体.
  • 评估了各种固定,干燥和成像 (室温和冷温度) 技术.
  • 采用哈拉利克纹理特征用于定量表面分析.

主要成果:

  • 方法复杂性与子外和附属物的可见性进行比较.
  • 使用Haralick纹理特征量化表面外观差异.
  • 确定了最佳的制备方法,以保存子结构和表面细节.

结论:

  • 建立了为SEM准备细菌子的协议.
  • 通过优化SEM准备,促进了对子特征的准确和可靠分析.