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Related Concept Videos

NMR Spectrometers: Resolution and Error Correction01:14

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When magnetic nuclei in a sample achieve resonance and undergo relaxation, the signal detected in NMR is an approximately exponential free induction decay. Fourier transform of an exponential decay yields a Lorentzian peak in the frequency domain. Lorentzian peaks in an NMR spectrum are defined by their amplitude, full width at half maximum, and position, where the peak width is governed by the spin-spin relaxation time alone. In real experiments, however, the applied magnetic field is rendered...
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Homonuclear correlation spectroscopy (COSY) is a powerful technique used in Nuclear Magnetic Resonance (NMR) spectroscopy to study the correlations between nuclei of the same type within a molecule. It provides information about scalar couplings between adjacent nuclei, which helps determine connectivity and structural information. There are several COSY variants, each with its unique strengths and experimental parameters.
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Double Resonance Techniques: Overview01:12

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Double resonance techniques in Nuclear Magnetic Resonance (NMR) spectroscopy involve the simultaneous application of two different frequencies or radiofrequency pulses to manipulate and observe two distinct nuclear spins. One important application of double resonance is spin decoupling, which selectively suppresses coupling with one type of nucleus while observing the NMR signal from another nucleus, simplifying the spectrum and enhancing resolution.
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Spin systems where the difference in chemical shifts of the coupled nuclei is greater than ten times J are called first-order spin systems. These nuclei are weakly coupled, and their chemical shifts and coupling constant can generally be estimated from the well-separated signals in the spectrum.
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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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Updated: Apr 1, 2026

Atomic Scale Structural Studies of Macromolecular Assemblies by Solid-state Nuclear Magnetic Resonance Spectroscopy
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Super-Resolution solid-state NMR Spectroscopy.

Olivia Gampp1, Riccardo Cadalbert1, Roland Riek2

  • 1Institute of Molecular Physical Science, ETH Zürich, Vladimir-Prelog-Weg 2, Zürich, CH-8093, Switzerland.

Journal of Biomolecular NMR
|March 31, 2026
PubMed
Summary
This summary is machine-generated.

Super-resolution NMR enhances solid-state spectral resolution without specialized hardware. This dynamic number of scans (DNS) method improves sensitivity and peak detection for better structural insights.

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Area of Science:

  • Nuclear Magnetic Resonance (NMR) Spectroscopy
  • Biophysical Chemistry
  • Structural Biology

Background:

  • Solid-state NMR spectroscopy faces challenges with low spectral resolution.
  • Conventional methods like fast magic-angle spinning (MAS) and ¹H detection require expensive equipment.
  • Improving resolution is crucial for detailed molecular structure determination.

Purpose of the Study:

  • To implement and validate a super-resolution technique for solid-state NMR.
  • To assess the impact of dynamic number of scans (DNS) sampling on spectral quality.
  • To provide an accessible method for enhancing solid-state NMR spectral resolution.

Main Methods:

  • Application of dynamic number of scans (DNS) sampling, a super-resolution technique.
  • Utilizing 2D ¹³C-¹³C Distance-Restrained (DARR) experiments.
  • Testing the method on the AP205 capsid protein.

Main Results:

  • Achieved an effective doubling of spectral resolution, reducing peak widths by approximately 50% (from ~180 Hz to ~87 Hz).
  • Demonstrated a 20% gain in sensitivity compared to post-acquisition apodization.
  • Increased the number of detectable peaks by 309, with 20% more sequential and 25% more long-range contacts.

Conclusions:

  • Super-resolution via DNS sampling is a simple and effective strategy to enhance solid-state NMR spectral quality.
  • This method offers significant advantages in resolution, sensitivity, and peak detectability.
  • The technique is broadly applicable across various MAS frequencies, making high-quality solid-state NMR more accessible.