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

NMR Spectroscopy of Benzene Derivatives01:34

NMR Spectroscopy of Benzene Derivatives

7.7K
Simple unsubstituted benzene has six aromatic protons, all chemically equivalent. Therefore, benzene exhibits only a singlet peak at δ 7.3 ppm in the 1H NMR spectrum. The observed shift is far downfield because the aromatic ring current strongly deshields the protons. Any substitution on the benzene ring makes the aromatic protons nonequivalent, and the protons split each other. The peak is, therefore, no longer a singlet and the splitting pattern and their associated coupling...
7.7K

You might also read

Related Articles

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

Sort by
Same author

A prediction model for targeted drug resistance in renal cell carcinoma based on plasma proteomics analysis.

Translational andrology and urology·2026
Same author

Correction: Motivations of patients with dentofacial deformities seeking orthognathic treatment: an application of Q methodology.

Frontiers in oral health·2026
Same author

Motivations of patients with dentofacial deformities seeking orthognathic treatment: an application of Q methodology.

Frontiers in oral health·2026
Same author

Excellent Thermal Stability and Environmental Sustainability of Trifluorodimethyl Sulfide as a Potential Alternative Refrigerant.

The journal of physical chemistry. A·2026
Same author

TPX2-mediated autophagy maintains cancer stemness in LUAD: bioinformatic screening and functional validation.

Frontiers in oncology·2026
Same author

Unraveling Separation Mechanisms of Propanol Isomers and Water in LTA Zeolites via Deep Potential Molecular Dynamics.

Langmuir : the ACS journal of surfaces and colloids·2026

Related Experiment Video

Updated: Jun 10, 2025

Elucidating the Metabolism of 2,4-Dibromophenol in Plants
06:54

Elucidating the Metabolism of 2,4-Dibromophenol in Plants

Published on: February 10, 2023

793

Unexplained high and persistent methyl bromide emissions in China.

Xiaoyi Hu1, Bo Yao2,3, Jens Mühle4

  • 1College of Environmental & Resource Sciences, Zhejiang University, Hangzhou, Zhejiang, 310058, China.

Nature Communications
|October 15, 2024
PubMed
Summary

China

More Related Videos

Assessment of Methane and Nitrous Oxide Fluxes from Paddy Field by Means of Static Closed Chambers Maintaining Plants Within Headspace
09:03

Assessment of Methane and Nitrous Oxide Fluxes from Paddy Field by Means of Static Closed Chambers Maintaining Plants Within Headspace

Published on: September 6, 2018

12.2K
Design and Use of a Full Flow Sampling System FFS for the Quantification of Methane Emissions
08:18

Design and Use of a Full Flow Sampling System FFS for the Quantification of Methane Emissions

Published on: June 12, 2016

16.7K

Related Experiment Videos

Last Updated: Jun 10, 2025

Elucidating the Metabolism of 2,4-Dibromophenol in Plants
06:54

Elucidating the Metabolism of 2,4-Dibromophenol in Plants

Published on: February 10, 2023

793
Assessment of Methane and Nitrous Oxide Fluxes from Paddy Field by Means of Static Closed Chambers Maintaining Plants Within Headspace
09:03

Assessment of Methane and Nitrous Oxide Fluxes from Paddy Field by Means of Static Closed Chambers Maintaining Plants Within Headspace

Published on: September 6, 2018

12.2K
Design and Use of a Full Flow Sampling System FFS for the Quantification of Methane Emissions
08:18

Design and Use of a Full Flow Sampling System FFS for the Quantification of Methane Emissions

Published on: June 12, 2016

16.7K

Area of Science:

  • Atmospheric Chemistry
  • Environmental Science
  • Ozone Layer Research

Background:

  • Methyl bromide (CH3Br) is a significant ozone-depleting substance regulated globally.
  • Accurate quantification of CH3Br emissions is crucial for monitoring Montreal Protocol compliance and ozone layer recovery.
  • The spatial and temporal distribution of CH3Br emissions in China has not been clearly understood.

Purpose of the Study:

  • To estimate national CH3Br emissions in China from 2011 to 2020 using atmospheric observations.
  • To compare top-down emission estimates with bottom-up inventory data.
  • To identify the contribution of underestimated or unidentified sources to CH3Br emissions.

Main Methods:

  • Utilized atmospheric observations from 10 monitoring sites across China.
  • Employed an atmospheric inversion technique for top-down emission estimation.
  • Compared results with an updated bottom-up inventory of identified emission sources.

Main Results:

  • Observed significantly enhanced CH3Br mole fractions, particularly in eastern China.
  • Top-down emission estimates were 5.5 ± 1.4 gigagrams per year higher than bottom-up estimates.
  • Approximately 60% of observed CH3Br emissions originated from underestimated or unidentified sources.

Conclusions:

  • Significant unaccounted CH3Br emissions exist in China, impacting stratospheric ozone depletion.
  • Findings have critical implications for assessing compliance with the Montreal Protocol.
  • Further research is needed to identify and quantify previously unknown CH3Br emission sources.