Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Double Resonance Techniques: Overview01:12

Double Resonance Techniques: Overview

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.
Spin decoupling is usually achieved by...
Speed of Sound in Solids and Liquids00:51

Speed of Sound in Solids and Liquids

Most solids and liquids are incompressible—their densities remain constant throughout. In the presence of an external force, the molecules tend to restore to their original positions, which is only possible because the constituents interact. The interactions help the constituents pass on information about external disturbances, like sound waves. Therefore, sound waves travel faster through these media. Compared to solids, the constituents in a liquid are less tightly bound. Thus, sound waves...
¹H NMR: Interpreting Distorted and Overlapping Signals01:02

¹H NMR: Interpreting Distorted and Overlapping Signals

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.
As Δν decreases and the signals move closer, the doublets appear increasingly distorted. The intensities of the inner lines increase at the cost of those of the outer lines as the signals are slanted or...
NMR Spectrometers: Resolution and Error Correction01:14

NMR Spectrometers: Resolution and Error Correction

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...
Nuclear Overhauser Enhancement (NOE)01:06

Nuclear Overhauser Enhancement (NOE)

Irradiation of a spin-active nucleus causes an increase or decrease in the signal intensity of neighboring nuclei that are not necessarily chemically bonded or involved in J-coupling. This phenomenon, called the nuclear Overhauser enhancement (NOE), results from through-space interactions between the nuclear spins. The NOE effect decreases with increasing internuclear distance and is generally not observed beyond 4 angstroms. In NOE, dipole-dipole interactions between neighboring spin-active...
Atomic Nuclei: Nuclear Relaxation Processes01:23

Atomic Nuclei: Nuclear Relaxation Processes

In the absence of an external magnetic field, nuclear spin states are degenerate and randomly oriented. When a magnetic field is applied, the spins begin to precess and orient themselves along (lower energy) or against (higher energy) the direction of the field. At equilibrium, a slight excess population of spins exists in the lower energy state. Because the direction of the magnetic field is fixed as the z-axis,  the precessing magnetic moments are randomly oriented around the z-axis. This...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Comparative study of three-dimensional versus two-dimensional video-assisted thoracoscopic two-port lobectomy.

Thoracic cancer·2016
Same author

Macrophages Undergo M1-to-M2 Transition in Adipose Tissue Regeneration in a Rat Tissue Engineering Model.

Artificial organs·2016
Same author

Bone morphogenetic protein 9 (BMP9) induces effective bone formation from reversibly immortalized multipotent adipose-derived (iMAD) mesenchymal stem cells.

American journal of translational research·2016
Same author

The role of perineural invasion on head and neck adenoid cystic carcinoma prognosis: a systematic review and meta-analysis.

Oral surgery, oral medicine, oral pathology and oral radiology·2016
Same author

Heterotypic 3D tumor culture in a reusable platform using pneumatic microfluidics.

Lab on a chip·2016
Same author

Correction to 'Different effects of invader-native phylogenetic relatedness on invasion success and impact: a meta-analysis of Darwin's naturalization hypothesis'.

Proceedings. Biological sciences·2016

Related Experiment Video

Updated: May 10, 2026

Neutron Spin Echo Spectroscopy as a Unique Probe for Lipid Membrane Dynamics and Membrane-Protein Interactions
10:02

Neutron Spin Echo Spectroscopy as a Unique Probe for Lipid Membrane Dynamics and Membrane-Protein Interactions

Published on: May 27, 2021

Ringing effects eliminated spin echo in solids.

Chao Ma1, Peng Li, Qun Chen

  • 1Department of Physics, Shanghai Key Laboratory of Magnetic Resonance, East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, PR China.

Journal of Magnetic Resonance (San Diego, Calif. : 1997)
|June 25, 2013
PubMed
Summary
This summary is machine-generated.

New spin echo sequences eliminate ringing artifacts in NMR spectroscopy. These sequences use additional pulses and phase cycling to achieve undistorted spectra with a minimal echo delay of 1.1μs.

Keywords:
Eliminate ringing effectsNuclear magnetic resonance (NMR)Spin echo

More Related Videos

Atomic Scale Structural Studies of Macromolecular Assemblies by Solid-state Nuclear Magnetic Resonance Spectroscopy
14:55

Atomic Scale Structural Studies of Macromolecular Assemblies by Solid-state Nuclear Magnetic Resonance Spectroscopy

Published on: September 17, 2017

Related Experiment Videos

Last Updated: May 10, 2026

Neutron Spin Echo Spectroscopy as a Unique Probe for Lipid Membrane Dynamics and Membrane-Protein Interactions
10:02

Neutron Spin Echo Spectroscopy as a Unique Probe for Lipid Membrane Dynamics and Membrane-Protein Interactions

Published on: May 27, 2021

Atomic Scale Structural Studies of Macromolecular Assemblies by Solid-state Nuclear Magnetic Resonance Spectroscopy
14:55

Atomic Scale Structural Studies of Macromolecular Assemblies by Solid-state Nuclear Magnetic Resonance Spectroscopy

Published on: September 17, 2017

Area of Science:

  • Magnetic Resonance
  • Spectroscopy

Background:

  • Ringing effects can distort Nuclear Magnetic Resonance (NMR) spectra.
  • These distortions arise from the non-secular term in the spin echo time calculation.
  • Compensating for these effects is crucial for accurate spectral analysis.

Purpose of the Study:

  • To introduce novel spin echo sequences that eliminate ringing effects.
  • To achieve high-quality NMR spectra with minimal echo delay.
  • To investigate the underlying principles of spectral symmetry and phase cycling.

Main Methods:

  • Implementation of two additional 90° pulses with specific phase cycles at the sequence's start.
  • Calculation of spin echo time using first-order perturbation theory, considering the dipolar secular term.
  • Utilizing the symmetry properties of NMR sequences under phase inversion for compensation.

Main Results:

  • Successfully eliminated two types of ringing effects in spin echo sequences.
  • Obtained NMR spectra with an echo delay as short as 1.1μs without distortion.
  • Demonstrated compensation of spectral asymmetry caused by the non-secular term.
  • Observed a minor drop in echo amplitude, with negligible impact on echo time.

Conclusions:

  • The developed spin echo sequences effectively suppress ringing artifacts.
  • These sequences enable high-fidelity NMR spectroscopy at very short echo times.
  • The findings are validated on a Bruker AVANCE III NMR instrument, showing practical applicability.