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The early pioneers of microscopy opened a window into the invisible world of microorganisms. In 1830, Joseph Jackson Lister created an essentially modern light microscope. The 20th century saw the development of microscopes that leveraged nonvisible light, such as fluorescence microscopy that uses an ultraviolet light source and electron microscopy that uses short-wavelength electron beams. These advances significantly improved magnification, image resolution, and contrast. By comparison, the...
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Synchrotron X-ray Microdiffraction and Fluorescence Imaging of Mineral and Rock Samples
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Applications of X-Ray Micro-Beam for Data Collection.

Ruslan Sanishvili1, Robert F Fischetti2

  • 1GM/CA@APS, Advanced Photon Source, Argonne National Laboratory, Argonne, IL, USA. rsanishvili@anl.gov.

Methods in Molecular Biology (Clifton, N.J.)
|June 3, 2017
PubMed
Summary

Advanced micro-diffraction tools are revolutionizing macromolecular crystallography by enabling experiments on tiny, inhomogeneous, or invisible samples. These tools enhance data quality and experimental design for broader applications.

Keywords:
Inhomogeneous crystalsMicro-beamMicro-diffractionMicro-focusMulti-crystal data collectionRadiation damageRasterSignal-to-noiseSmall crystals

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Area of Science:

  • Crystallography
  • Structural Biology

Background:

  • Micro-diffraction tools, developed in the late 1990s, are now essential components of synchrotron beamlines.
  • These tools have expanded the scope of macromolecular crystallography experiments previously considered unfeasible.

Purpose of the Study:

  • To highlight the capabilities and advancements of micro-diffraction tools.
  • To discuss the implications of these tools for experimental design and data collection in crystallography.

Main Methods:

  • Utilizing micron-scale beams generated through various techniques.
  • Implementing precision goniometry and advanced detection systems.
  • Focusing on the sophistication, robustness, and user-friendliness of the tools.

Main Results:

  • Enabling data collection from very small (micrometer-sized) samples.
  • Facilitating experiments with larger, inhomogeneous samples.
  • Allowing analysis of optically invisible samples.
  • Improving signal-to-noise ratio and mitigating radiation damage.
  • Leading to better-designed diffraction experiments.

Conclusions:

  • Micro-diffraction tools have significantly advanced macromolecular crystallography.
  • Understanding the implementation details of micro-beams and instrument parameters is crucial for experimental success.
  • The widespread applicability of micro-diffraction relies on the technical capabilities, robustness, and user-friendliness of the tools.