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

Nuclear Overhauser Enhancement (NOE)01:06

Nuclear Overhauser Enhancement (NOE)

1.4K
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...
1.4K
¹H NMR: Interpreting Distorted and Overlapping Signals01:02

¹H NMR: Interpreting Distorted and Overlapping Signals

1.5K
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...
1.5K
Extraction: Advanced Methods00:56

Extraction: Advanced Methods

1.1K
Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is...
1.1K
Interpreting ¹H NMR Signal Splitting: The (n + 1) Rule01:10

Interpreting ¹H NMR Signal Splitting: The (n + 1) Rule

2.4K
In the AX proton spin system, proton A can sense the two spin states of a coupled proton X, resulting in a doublet NMR signal with two peaks of equal (1:1) intensity. When proton A is coupled to two equivalent protons (AX2 spin system), the spin states of each X can be aligned with or against the external field, creating three possible scenarios. This results in a 1:2:1  triplet signal, where the central peak corresponds to the chemical shift of A and is twice as large or intense as the...
2.4K
Double Resonance Techniques: Overview01:12

Double Resonance Techniques: Overview

696
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...
696
Optimizing Chromatographic Separations01:15

Optimizing Chromatographic Separations

876
Optimizing chromatographic separations is crucial for obtaining clean separations in a minimum amount of time. Optimization is required for several factors, including kinetic effects related to band broadening, plate height, capacity factor, and separation factor.
Band broadening refers to spreading solute bands as they travel through the column. This broadening can impact resolution. Plate height (H) represents the length required for one theoretical plate. A lower plate height corresponds to...
876

You might also read

Related Articles

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

Sort by
Same author

Quercetin-loaded PCL scaffold suppresses bone metastatic tumors and augments in situ bone formation.

BMC biotechnology·2026
Same author

BCL-2/BCL-xL inhibitor pelcitoclax with osimertinib for <i>EGFR</i>-mutated advanced non-small-cell lung cancer: a phase 1b trial.

Journal for immunotherapy of cancer·2026
Same author

Integrated clinical and genomic characterization of <i>Acinetobacter baumannii</i> causing bloodstream infections in a Chinese tertiary hospital.

Journal of medical microbiology·2026
Same author

Students' competencies in Problem-Based Learning influence evaluation of tutors.

Frontiers in psychology·2026
Same author

Exosomes from bipolar disorder patients induce mania- and depression-like behaviors in mice via shared and distinct neuroimmune signatures.

Brain, behavior, and immunity·2026
Same author

Early-life musical intervention programs neuroimmune activity and synaptic plasticity to enhance adult learning and memory.

Brain, behavior, and immunity·2026

Related Experiment Video

Updated: Jan 14, 2026

Author Spotlight: Investigating the Role of Repetitive DNA Misregulation in Cancer Initiation and Immunotherapy Resistance
04:58

Author Spotlight: Investigating the Role of Repetitive DNA Misregulation in Cancer Initiation and Immunotherapy Resistance

Published on: December 13, 2024

4.0K

A scheme for decomposing overlapping peak based on the adaptive convolution method and enhanced northern goshawk

Hexi Wu1, Sizhi Li2, Rui Qiu3

  • 1School of Nuclear Science and Engineering, East China University of Technology, Nanchang, 330013, China; Department of Engineering Physics, Tsinghua University, Beijing, 100084, China.

Applied Radiation and Isotopes : Including Data, Instrumentation and Methods for Use in Agriculture, Industry and Medicine
|October 23, 2025
PubMed
Summary

This study introduces an adaptive convolution (AC) and enhanced northern goshawk optimization (ENGO) method for precise analysis of overlapping peaks in sodium iodide (NaI(Tl)) gamma-ray spectrometry. The novel approach accurately decomposes complex spectra, improving radioactivity measurements.

Keywords:
Adaptive convolution methodDecomposing overlapping peakENGO algorithmGamma-ray energy spectrometer

More Related Videos

The Terroir Concept Interpreted through Grape Berry Metabolomics and Transcriptomics
13:02

The Terroir Concept Interpreted through Grape Berry Metabolomics and Transcriptomics

Published on: October 5, 2016

10.9K
A Strategy for Sensitive, Large Scale Quantitative Metabolomics
14:18

A Strategy for Sensitive, Large Scale Quantitative Metabolomics

Published on: May 27, 2014

21.6K

Related Experiment Videos

Last Updated: Jan 14, 2026

Author Spotlight: Investigating the Role of Repetitive DNA Misregulation in Cancer Initiation and Immunotherapy Resistance
04:58

Author Spotlight: Investigating the Role of Repetitive DNA Misregulation in Cancer Initiation and Immunotherapy Resistance

Published on: December 13, 2024

4.0K
The Terroir Concept Interpreted through Grape Berry Metabolomics and Transcriptomics
13:02

The Terroir Concept Interpreted through Grape Berry Metabolomics and Transcriptomics

Published on: October 5, 2016

10.9K
A Strategy for Sensitive, Large Scale Quantitative Metabolomics
14:18

A Strategy for Sensitive, Large Scale Quantitative Metabolomics

Published on: May 27, 2014

21.6K

Area of Science:

  • Nuclear Physics
  • Spectroscopy
  • Analytical Chemistry

Background:

  • Sodium iodide (NaI(Tl)) spectrometers are crucial for radioactivity measurements.
  • Limited spectral resolution leads to overlapping peaks, hindering accurate analysis.
  • Existing methods struggle with background noise and peak overlap.

Purpose of the Study:

  • To develop a robust method for accurate decomposition of overlapping peaks in NaI(Tl) gamma-ray spectra.
  • To enhance spectral analysis by suppressing background interference and improving noise resistance.
  • To achieve high precision in peak parameter and area determination.

Main Methods:

  • A novel scheme combining adaptive convolution (AC) and enhanced northern goshawk optimization (ENGO).
  • AC method for background suppression and noise reduction while preserving overlapping peak information.
  • ENGO algorithm utilizing SPM chaotic mapping, Lévy flight, and nonlinear step-size for high-dimensional optimization.

Main Results:

  • The proposed scheme achieved high accuracy in decomposing overlapping peaks across numerical, Monte Carlo, and IAEA simulated spectra.
  • Relative deviations for all peak parameters and areas were within ±0.530%, ±0.573%, and ±1.173% respectively.
  • Demonstrated accurate spectral analysis without the need for background subtraction.

Conclusions:

  • The AC-ENGO scheme offers a significant advancement in NaI(Tl) gamma-ray spectral analysis.
  • This method provides precise overlapping peak decomposition, crucial for reliable radioactivity measurements.
  • The approach enhances the utility of NaI(Tl) spectrometers in complex spectral environments.