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

605
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...
605
¹³C NMR: ¹H–¹³C Decoupling01:04

¹³C NMR: ¹H–¹³C Decoupling

1.6K
The probability of having two carbon-13 atoms next to each other is negligible because of the low natural abundance of carbon-13. Consequently, peak splitting due to carbon-carbon spin-spin coupling is not observed in spectra. However, protons up to three sigma bonds away split the carbon signal according to the n+1 rule, resulting in complicated spectra.
A broadband decoupling technique is used to simplify these complex, sometimes overlapping, signals. Broadband decoupling relies on a...
1.6K
Dielectric Polarization in a Capacitor01:31

Dielectric Polarization in a Capacitor

5.7K
The presence of a dielectric medium in a capacitor not only changes the voltage and capacitance but also affects the electric field. In general, dielectrics can be of two types: polar and nonpolar. In a polar dielectric, the positive and negative charges in the molecules are separated by a distance and hence have a permanent dipole moment. In contrast, no such charge separation exists in a nonpolar dielectric, however the nonpolar molecules get polarized in the presence of an external electric...
5.7K
Atomic Nuclei: Magnetic Resonance01:05

Atomic Nuclei: Magnetic Resonance

1.0K
The number of nuclear spins aligned in the lower energy state is slightly greater than those in the higher energy state. In the presence of an external magnetic field, as the spins precess at the Larmor frequency, the excess population results in a net magnetization oriented along the z axis. When a pulse or a short burst of radio waves at the Larmor frequency is applied along the x axis, the coupling of frequencies causes resonance and flips the nuclear spins of the excess population from the...
1.0K
Spherical and Cylindrical Capacitor01:26

Spherical and Cylindrical Capacitor

6.5K
A spherical capacitor consists of two concentric conducting spherical shells of radii R1 (inner shell) and R2 (outer shell). The shells have  equal and opposite charges of +Q and −Q, respectively. For an isolated conducting spherical capacitor, the radius of the outer shell can be considered to be infinite.
Conventionally, considering the  symmetry, the electric field between the concentric shells of a spherical capacitor is directed radially outward. The magnitude of the field,...
6.5K
NMR Spectrometers: Resolution and Error Correction01:14

NMR Spectrometers: Resolution and Error Correction

980
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...
980

You might also read

Related Articles

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

Sort by
Same author

Nitrogen-Tuned Cationic Au Sites on TiO<sub>2</sub> Enable Selective Methane Oxidation to Methanol.

Journal of the American Chemical Society·2026
Same author

Solid-State NMR Quantification of Brønsted-Lewis Acid Site Cooperativity in Zeolites for Glucose Conversion.

The journal of physical chemistry letters·2026
Same author

Improved latitudinal carbon budgets from global airborne surveys.

Proceedings of the National Academy of Sciences of the United States of America·2026
Same author

Integrative network toxicology and multi-omics analyses reveal divergent molecular programs underlying pyrethroid-induced ovarian dysfunction.

Environment international·2026
Same author

Genetic risk of Alzheimer's disease is associated with loss of brain network segregation in midlife.

Communications biology·2026
Same author

Enhanced detection of bladder cancer using combined circulating tumor cells, urine-derived epithelial cells, and molecular biomarkers.

Journal of cancer research and clinical oncology·2026

Related Experiment Video

Updated: Dec 21, 2025

Frequency Mixing Magnetic Detection Scanner for Imaging Magnetic Particles in Planar Samples
07:01

Frequency Mixing Magnetic Detection Scanner for Imaging Magnetic Particles in Planar Samples

Published on: June 9, 2016

9.9K

Inside-out azimuthally selective NMR tool using array coil and capacitive decoupling.

Sihui Luo1, Lizhi Xiao2, Fangrong Zong3

  • 1State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing, China.

Journal of Magnetic Resonance (San Diego, Calif. : 1997)
|May 15, 2020
PubMed
Summary

This study introduces a novel tool for inside-out nuclear magnetic resonance (NMR) to precisely measure azimuthal heterogeneity in large in-situ samples, improving oil and gas reservoir evaluation.

Keywords:
Array CoilCapacitive DecouplingDownholeImagingInside-out NMRLow-field

More Related Videos

MRM Microcoil Performance Calibration and Usage Demonstrated on Medicago truncatula Roots at 22 T
10:22

MRM Microcoil Performance Calibration and Usage Demonstrated on Medicago truncatula Roots at 22 T

Published on: January 16, 2021

5.8K
Optimized Setup and Protocol for Magnetic Domain Imaging with In Situ Hysteresis Measurement
09:43

Optimized Setup and Protocol for Magnetic Domain Imaging with In Situ Hysteresis Measurement

Published on: November 7, 2017

9.8K

Related Experiment Videos

Last Updated: Dec 21, 2025

Frequency Mixing Magnetic Detection Scanner for Imaging Magnetic Particles in Planar Samples
07:01

Frequency Mixing Magnetic Detection Scanner for Imaging Magnetic Particles in Planar Samples

Published on: June 9, 2016

9.9K
MRM Microcoil Performance Calibration and Usage Demonstrated on Medicago truncatula Roots at 22 T
10:22

MRM Microcoil Performance Calibration and Usage Demonstrated on Medicago truncatula Roots at 22 T

Published on: January 16, 2021

5.8K
Optimized Setup and Protocol for Magnetic Domain Imaging with In Situ Hysteresis Measurement
09:43

Optimized Setup and Protocol for Magnetic Domain Imaging with In Situ Hysteresis Measurement

Published on: November 7, 2017

9.8K

Area of Science:

  • Geophysics
  • Nuclear Magnetic Resonance (NMR) Spectroscopy
  • Petroleum Engineering

Background:

  • Inside-out NMR is crucial for in-situ reservoir characterization but struggles with azimuthal heterogeneity.
  • Existing methods lack the ability to resolve directional properties and pinpoint oil/gas locations.

Purpose of the Study:

  • To design and construct an innovative tool for investigating azimuthal spatial heterogeneity in large in-situ samples.
  • To enhance inside-out NMR measurements by capturing directional information lost in current techniques.

Main Methods:

  • Development of a novel tool featuring an array coil for azimuthal selection, measurement consistency, and interactive isolation.
  • Implementation of a capacitive decoupling network to mitigate strong coupling between adjacent coil elements.
  • Coil modeling, numerical simulation, theoretical analysis, and experimental validation.

Main Results:

  • The novel array coil configuration effectively captures heterogeneity information.
  • The capacitive decoupling network successfully minimizes mutual coupling effects, enhancing coil sensitivity.
  • Simulation and experimental results confirm excellent coil element consistency and independence.

Conclusions:

  • The developed tool enables feasible acquisition of azimuthal NMR data, addressing limitations of conventional methods.
  • This innovation offers improved accuracy in evaluating reservoir properties and locating hydrocarbons by resolving azimuthal heterogeneity.