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Related Concept Videos

Applications Of NMR In Biology01:25

Applications Of NMR In Biology

4.4K
Nuclear magnetic resonance (NMR) spectroscopy is a very valuable analytical technique for researchers. It has been used for more than 50 years as an analytical tool. F. Bloch and E. Purcell formulated NMR in 1946 and won the 1952 Nobel Prize in Physics  for their work. Biological macromolecules such as proteins, nucleic acids, lipids, and organic molecules including pharmaceutical compounds, can be studied using this versatile tool that exploits the magnetic properties of certain nuclei.
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Two-Dimensional (2D) NMR: Overview01:12

Two-Dimensional (2D) NMR: Overview

1.4K
The 1D NMR spectrum of large and complex molecules like natural products has complicated splitting patterns and overlapping signals, which can be easily interpreted using 2-dimensional (2D) NMR. Unlike 1D NMR, 2D NMR has two frequency axes that provide the coupling information between the nucleus A and nucleus B in a molecule. The process from which 2D spectra are obtained has four steps.
The first step is the preparation period, during which nucleus A is excited with a radiofrequency pulse....
1.4K
NMR Spectrometers: Radiofrequency Pulses and Pulse Sequences01:17

NMR Spectrometers: Radiofrequency Pulses and Pulse Sequences

1.7K
A pulse is a short burst of radio waves distributed over a range of frequencies that simultaneously excites all the nuclei in the sample. Upon passing a radio frequency pulse along the x-axis, the nuclei absorb energy corresponding to their Larmor frequencies and achieve resonance. This shifts the net magnetization vector from the z-axis toward the transverse plane. This angle of rotation of the magnetization vector, or the flip angle, is proportional to the duration and intensity of the pulse.
1.7K
NMR Spectrometers: Overview01:20

NMR Spectrometers: Overview

2.1K
NMR spectrometers consist of a strong magnet, a radiofrequency transmitter, and a detector attached to a computer console for recording spectra of samples containing NMR-active nuclei. In first-generation NMR instruments called continuous-wave spectrometers, the resonance frequencies of the nuclei are determined by frequency-sweep or field-sweep methods. The magnetic field strength is fixed and the rf signal is swept in the former, while the radiofrequency signal is fixed and the magnetic field...
2.1K
Nuclear Magnetic Resonance (NMR): Overview01:07

Nuclear Magnetic Resonance (NMR): Overview

6.6K
Nuclear magnetic resonance (NMR) is a phenomenon exhibited by certain nuclei that can absorb characteristic radio frequency radiation under certain conditions. NMR has been extensively applied in molecular spectroscopy and medical diagnostic imaging. In both these applications, the molecule or subject under study is placed in a magnetic field and irradiated with radio frequency energy.
NMR spectroscopy generates a spectrum where the characteristic absorption frequencies of the sample are...
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NMR data processing, visualization, analysis and structure calculation with NMRFx.

Ellen Koag1, Simon G Hulse1, Gregory L Helms1

  • 1Structural Biology Initiative, Advanced Science Research Center at the CUNY Graduate Center, New York, NY, USA.

Communications Chemistry
|December 5, 2025
PubMed
Summary
This summary is machine-generated.

NMRFx is a new software application that enhances nuclear magnetic resonance (NMR) data analysis. It offers advanced features for processing, visualizing, and interpreting complex molecular data across various scientific fields.

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Area of Science:

  • Chemistry
  • Biochemistry
  • Structural Biology

Background:

  • Nuclear Magnetic Resonance (NMR) spectroscopy provides crucial chemical, structural, and dynamical information about molecular systems.
  • Effective analysis of NMR data relies on sophisticated computational tools for processing, visualization, and interpretation.
  • Existing software may lack integrated features for comprehensive NMR data analysis.

Purpose of the Study:

  • To introduce NMRFx, a novel software application designed to streamline and enhance NMR data analysis.
  • To integrate and augment the functionalities of established NMR analysis tools (NMRViewJ and NMRFx Processor).
  • To demonstrate the utility of NMRFx across diverse scientific applications through case studies.

Main Methods:

  • Development of NMRFx, a high-speed, feature-rich graphical user interface (GUI) application.
  • Integration of data processing, peak picking, assignment, chemical shift prediction, and molecular structure calculation capabilities.
  • Application of NMRFx to diverse case studies including protein, RNA, natural product, and metabolomics analyses.

Main Results:

  • NMRFx successfully facilitates comprehensive NMR data processing and analysis.
  • The software demonstrates high-speed performance and a rich feature set for complex datasets.
  • Case studies confirm NMRFx's effectiveness in diverse applications, from small molecules to large biomolecules and metabolomics.

Conclusions:

  • NMRFx represents a significant advancement in NMR data analysis software.
  • The integrated platform offers enhanced capabilities for researchers across multiple scientific disciplines.
  • NMRFx provides a powerful and versatile tool for deriving molecular insights from NMR experiments.