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相关概念视频

Super-resolution Fluorescence Microscopy01:37

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Super-resolution fluorescence microscopy (SRFM) provides a better resolution than conventional fluorescence microscopy by reducing the point spread function (PSF). PSF is the light intensity distribution from a point that causes it to appear blurred. Due to PSF, each fluorescing point appears bigger than its actual size, and it is the PSF interference of nearby fluorophores that causes the blurred image. Various approaches to achieving higher resolution through SRFM have recently been...
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Confocal microscopy is an advanced microscopic technique. The prime advantage of the confocal microscope over other microscopy techniques is its ability to block the out-of-focus light from the illuminated samples using pinholes. It is widely used with fluorescence optics to obtain high-resolution, sharp contrast images. Unlike optical microscopes, confocal microscopes use a focused beam of light laser to scan the entire sample surface at different z-planes. These microscopes are, therefore,...
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Total internal reflection fluorescence microscopy or TIRF is an advanced microscopic technique used to visualize fluorophores in samples close to a solid surface with a higher refractive index, such as a glass coverslip. TIRF only allows fluorophores in proximity to the solid surface to be excited. When light from a medium with a lower refractive index (such as air) hits the glass coverslip at a critical angle, the light undergoes total internal reflection stead of passing through the glass.
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Simultaneous Multicolor Imaging of Biological Structures with Fluorescence Photoactivation Localization Microscopy
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分子级超分辨率光成像分子级超分辨率光成像

Niels Radmacher1, Alexey I Chizhik1, Oleksii Nevskyi1

  • 1Third Institute of Physics - Biophysics, Georg August University of Göttingen, Göttingen, Germany;

Annual review of biophysics
|February 14, 2025
PubMed
概括
此摘要是机器生成的。

先进的光显微镜技术,如单分子定位显微镜 (SMLM) 正在实现前所未有的分辨率,与电子显微镜竞争. 像DNA-PAINT和MINFLUX这样的创新克服了局限性,使分子级成像成为可能.

关键词:
扩张显微镜扩张显微镜光寿命超分辨率显微镜显微镜分子分辨率的分子分辨率.单分子局部化显微镜.

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科学领域:

  • 光学显微镜的使用方法
  • 生物物理学的生物物理.
  • 纳米技术 纳米技术

背景情况:

  • 在过去的30年里,光显微镜在精细细节的解析方面取得了显著的进步.
  • 像STED,可光激活定位显微镜和STORM这样的技术已经逐渐提高了分辨率.
  • 单分子定位显微镜 (SMLM) 通过克服光漂白来提供增强的分辨率.

研究的目的:

  • 审查单分子局部化显微镜 (SMLM) 的最新进展.
  • 突出先进的SMLM方法及其对生物成像的潜在影响.
  • 讨论推动分子分辨率边界的技术.

主要方法:

  • 讨论单分子局部化显微镜 (SMLM),包括直接STORM等方法.
  • 在纳米级地形图像 (DNA-PAINT) 中用于持续标签更新的DNA点积累的探索.
  • 对最小光子流量成像 (MINFLUX),通过序列成像 (RESI) 增强分辨率和PAINT-MINFLUX的审查.

主要成果:

  • 通过克服光漂白,特别是通过DNA-PAINT,SMLM可以实现比STED更高的分辨率.
  • 低温光显微镜和MINFLUX正在推动SMLM向分子分辨率迈进.
  • 像RESI和PAINT-MINFLUX这样的新方法正在进一步提高成像能力.

结论:

  • 在SMLM的最新进展正在彻底改变光显微镜.
  • 讨论的技术提供了与电子显微镜可比的分辨率.
  • 未来的发展有望为分子层面的生物结构提供前所未有的洞察力.