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Related Concept Videos

Super-resolution Fluorescence Microscopy01:37

Super-resolution Fluorescence Microscopy

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 developed.
Electron Microscope Tomography and Single-particle Reconstruction01:07

Electron Microscope Tomography and Single-particle Reconstruction

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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A Protocol for Real-time 3D Single Particle Tracking
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A Protocol for Real-time 3D Single Particle Tracking

Published on: January 3, 2018

Simultaneous single-particle superlocalization and rotational tracking.

Yan Gu1, Gufeng Wang, Ning Fang

  • 1Ames Laboratory, U.S. Department of Energy, and Department of Chemistry, Iowa State University, Ames, Iowa 50011, USA.

ACS Nano
|February 1, 2013
PubMed
Summary
This summary is machine-generated.

This study introduces a new microscopy technique combining super-localization with differential interference contrast (DIC) microscopy for simultaneous particle tracking and rotation analysis. The method precisely tracks nanoparticles in biological systems, offering new insights into cellular dynamics.

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Area of Science:

  • Biophysics
  • Nanotechnology
  • Microscopy

Background:

  • Super-localization microscopy is vital for studying nanoscale biological structures and dynamics.
  • Differential interference contrast (DIC) microscopy offers unique contrast but poses localization challenges due to its antisymmetric point spread function.

Purpose of the Study:

  • To develop a novel imaging technique combining super-localization with DIC microscopy for simultaneous single-particle orientation and rotational tracking.
  • To overcome the limitations of DIC microscopy in localizing antisymmetric point spread functions.
  • To enable nanometer-scale precision tracking of nanoparticles in biological environments.

Main Methods:

  • A dual-modality microscope configuration was employed.
  • Simultaneous rotational tracking and super-localization of single gold nanorods were performed.
  • The technique was applied to microtubule gliding assays and tracking nanocargos in cellular environments.

Main Results:

  • Achieved nanometer-scale precision in simultaneous localization and rotational tracking of single gold nanorods.
  • Successfully studied steric hindrance effects in microtubule gliding assays.
  • Demonstrated effective tracking of nanocargos within crowded cellular environments.

Conclusions:

  • The developed technique overcomes DIC microscopy's localization challenges for antisymmetric point spread functions.
  • This dual-modality approach provides both precise localization and rotational information for single nanoparticles.
  • The technique holds significant potential for investigating biological processes requiring simultaneous localization and orientation data.