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Related Concept Videos

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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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In chromatography, a solute moves through a chromatographic column and tends to spread, forming a Gaussian-shaped band. The longer the solute spends in the column, the broader the band becomes. The broadening can lead to overlaps within the column, affecting separation effectiveness.
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A racemic mixture, or racemate, is an equimolar mixture of enantiomers of a molecule that can be separated using their unique interaction with chiral molecules or media. Racemic mixtures are denoted by the (±)- prefix. This ‘optical rotation descriptor’ applies to the whole solution of a racemic mixture rather than a specific stereoisomer. Enantiomers typically have the same physical and chemical properties. Hence, they are not easily separable. However, enantiomers can exhibit...
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The resolution of a mass spectrometer depends on the efficiency of separating ions with different ion masses. The mass of an atom is approximated to the sum of the masses of protons and neutrons inside, considering the masses of protons and neutrons as equal. However, the masses of the proton (1.6726 × 10−24 g) and neutron (1.6749 × 10−24 g) are not truly equal. There is a minor error in the expression of atomic masses relative to the simplest atom of hydrogen. For...
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A fluorescence microscope uses fluorescent chromophores called fluorochromes, which can absorb energy from a light source and then emit this energy as visible light. Fluorochromes include naturally fluorescent substances (such as chlorophylls) and fluorescent stains that are added to the specimen to create contrast. Dyes such as Texas red and FITC are examples of fluorochromes. Other examples include the nucleic acid dyes 4’,6’-diamidino-2-phenylindole (DAPI), and acridine orange.
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Protons bonded to heteroatoms such as nitrogen and oxygen exhibit a range of chemical shift values. This is due to the varying degree of hydrogen bonding between the proton and the heteroatom in other molecules. The extent of hydrogen bonding affects the electron density around the proton, thereby giving different chemical shift values for the protons in the proton NMR spectrum.
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Super-resolution microscopy demystified.

Lothar Schermelleh1, Alexia Ferrand2, Thomas Huser3

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Super-resolution microscopy (SRM) overcomes the diffraction limit for detailed cellular imaging. This guide helps researchers choose the best SRM technique for their specific studies, enabling new biological discoveries.

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Area of Science:

  • Cell Biology
  • Microscopy
  • Biophysics

Background:

  • The diffraction limit of light restricts optical resolution to ~250 nm.
  • Super-resolution microscopy (SRM) surpasses this physical barrier.
  • SRM enables visualization of subcellular structures with high detail.

Purpose of the Study:

  • To provide guidance on selecting appropriate SRM techniques.
  • To aid biologists in investigating cellular structures and dynamics.
  • To facilitate new discoveries using advanced microscopy.

Main Methods:

  • Review and comparison of various SRM techniques.
  • Analysis of SRM applicability to different biological questions.
  • Guidance on experimental design for SRM.

Main Results:

  • Detailed overview of SRM principles and capabilities.
  • Framework for matching SRM methods to research objectives.
  • Examples of SRM applications in cell biology.

Conclusions:

  • SRM is a powerful tool for high-resolution cellular imaging.
  • Informed selection of SRM techniques is crucial for research success.
  • This guidance promotes effective utilization of SRM for biological insights.