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

Volatilization01:10

Volatilization

4.6K
Volatilization gravimetry is an analytical technique that measures the mass lost due to the volatilization of the substance. This technique is used to estimate the amount of volatile material in a sample. To perform this method, heat a known amount of the sample to a high temperature in a crucible or other suitable vessel. The volatile substance in the sample evaporates, and the vapor is completely expelled from the crucible either by heating the sample or bubbling a stream of inert gas through...
4.6K
Radical Autoxidation01:20

Radical Autoxidation

3.0K
The oxidation of an organic compound in the presence of air or oxygen is called autoxidation. For example, cumene reacts with oxygen to form hydroperoxide. Autoxidation involves initiation, propagation, and termination steps. Many organic compounds are susceptible to autoxidation—especially ethers in the presence of oxygen, which form hydroperoxides. Even though this reaction is slow, old ether bottles contain small amounts of peroxide, which leads to laboratory explosions during ether...
3.0K
Oxidative Cleavage of Alkenes: Ozonolysis01:46

Oxidative Cleavage of Alkenes: Ozonolysis

12.7K
In ozonolysis, ozone is used to cleave a carbon–carbon double bond to form aldehydes and ketones, or carboxylic acids, depending on the work-up.
Ozone is a symmetrical bent molecule stabilized by a resonance structure.
12.7K
Oxidations of Aldehydes and Ketones to Carboxylic Acids01:15

Oxidations of Aldehydes and Ketones to Carboxylic Acids

5.4K
Oxidation of aldehydes and ketones results in the formation of carboxylic acids. Aldehydes, bearing hydrogen next to the carbonyl group, are easily oxidized compared to ketones. This is because an aldehydic proton can easily be abstracted during oxidation.
Aldehydes readily undergo oxidation in strong oxidizing agents such as potassium permanganate and chromic acid. The oxidation can also be carried out using mild oxidizing agents such as silver oxide. In fact, aldehydes can be easily oxidized...
5.4K
Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide02:44

Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide

12.5K
Alkenes are converted to 1,2-diols or glycols through a process called dihydroxylation. It involves the addition of two hydroxyl groups across the double bond with two different stereochemical approaches, namely anti and syn. Dihydroxylation using osmium tetroxide progresses with syn stereochemistry.
12.5K
Turnover Number and Catalytic Efficiency01:19

Turnover Number and Catalytic Efficiency

19.9K
The turnover number of an enzyme is the maximum number of substrate molecules it can transform per unit time. Turnover numbers for most enzymes range from 1 to 1000 molecules per second. Catalase has the known highest turnover number, capable of converting up to 2.8×106 molecules of hydrogen peroxide into water and oxygen per second. Lysozyme has the lowest known turnover number of half a molecule per second.
Chymotrypsin is a pancreatic enzyme that breaks down proteins during digestion....
19.9K

You might also read

Related Articles

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

Sort by
Same author

The emergence of human influence on the ozone layer by the 1960s.

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

Trade-Offs between Sulfuric Acid Aerosol Precursors for Stratospheric Aerosol Geoengineering.

Environmental science & technology·2026
Same author

Atmospheric Chemistry Insights from the Global COVID-19 Pandemic: A Review.

Environmental science & technology·2026
Same author

Detectable global temperature responses to wildfires and volcanic eruptions.

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

Dynamic Evolution of Mass and Physical Properties of Atmospheric Organic Aerosol Under Solar Irradiance.

Environmental science & technology·2026
Same author

Enhanced radiative cooling by large aerosol particles from wildfire-driven thunderstorms.

Science advances·2025
Same journal

Modeling Daily Plume Specific Smoke Concentrations for Health Effects Studies with Estimates of Fire Size, Plume Age, and Fuel Type.

ACS ES&T air·2026
Same journal

Enhanced Isoprene Secondary Organic Aerosol Formation with C<sub>5</sub>-alkene Triols Newly Added to Current Chemical Mechanisms.

ACS ES&T air·2026
Same journal

Controlled-Release Experiment to Optimize Emission Quantification of H<sub>2</sub> Point Sources.

ACS ES&T air·2026
Same journal

Assessing Black Carbon and Iron Oxide Aerosols: A Comparative Study between Urban and Rural Environments in the Southeastern U.S.

ACS ES&T air·2026
Same journal

Source Contributions to Brown Carbon Absorption in Toronto Air during the Wildfire Season.

ACS ES&T air·2026
Same journal

Nonlinear Contributions of NO <sub><i>x</i></sub> and Volatile Chemical Products to Air Pollution and the Associated Acute Premature Mortality.

ACS ES&T air·2026
See all related articles

Related Experiment Video

Updated: Jan 8, 2026

Original Experimental Approach for Assessing Transport Fuel Stability
09:48

Original Experimental Approach for Assessing Transport Fuel Stability

Published on: October 21, 2016

9.7K

Changes in Volatile Organic Compound Composition from an Oxidation-Based Air Cleaner.

Qing Ye1,2, Isabel S Albores1, Seamus C Frey1

  • 1Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States.

ACS ES&T Air
|December 18, 2025
PubMed
Summary
This summary is machine-generated.

Oxidation-based air cleaners can convert ethanol into harmful byproducts like acetaldehyde and formaldehyde. This study highlights the risks of using these devices with complex indoor air pollutant mixtures.

Keywords:
air cleanerbyproductsindoor airmass spectrometervolatile organic compounds

More Related Videos

Production and Measurement of Organic Particulate Matter in the Harvard Environmental Chamber
09:46

Production and Measurement of Organic Particulate Matter in the Harvard Environmental Chamber

Published on: November 18, 2018

7.7K
Analyzing the Photo-oxidation of 2-propanol at Indoor Air Level Concentrations Using Field Asymmetric Ion Mobility Spectrometry
08:23

Analyzing the Photo-oxidation of 2-propanol at Indoor Air Level Concentrations Using Field Asymmetric Ion Mobility Spectrometry

Published on: June 14, 2018

9.2K

Related Experiment Videos

Last Updated: Jan 8, 2026

Original Experimental Approach for Assessing Transport Fuel Stability
09:48

Original Experimental Approach for Assessing Transport Fuel Stability

Published on: October 21, 2016

9.7K
Production and Measurement of Organic Particulate Matter in the Harvard Environmental Chamber
09:46

Production and Measurement of Organic Particulate Matter in the Harvard Environmental Chamber

Published on: November 18, 2018

7.7K
Analyzing the Photo-oxidation of 2-propanol at Indoor Air Level Concentrations Using Field Asymmetric Ion Mobility Spectrometry
08:23

Analyzing the Photo-oxidation of 2-propanol at Indoor Air Level Concentrations Using Field Asymmetric Ion Mobility Spectrometry

Published on: June 14, 2018

9.2K

Area of Science:

  • Indoor air quality research
  • Environmental chemistry
  • Public health

Background:

  • Air cleaning devices aim to reduce indoor air pollutants like volatile organic compounds (VOCs).
  • Oxidation-based air cleaners may produce harmful byproducts, potentially negating their benefits.
  • Limited studies exist on byproduct formation from complex VOC mixtures.

Purpose of the Study:

  • To investigate byproduct formation from an oxidation-based air cleaner using a real-world VOC mixture.
  • To assess the impact of air cleaner operation on indoor air composition.
  • To evaluate the health implications of ethanol oxidation by air cleaners.

Main Methods:

  • Challenged an oxidation-based air cleaner with a VOC mixture from an air freshener in a controlled environmental chamber.
  • Utilized real-time analytical instruments to measure VOC concentrations.
  • Analyzed changes in VOC composition over several hours of air cleaner operation.

Main Results:

  • Observed a significant decrease in ethanol and larger VOCs within hours.
  • Detected the formation of C1-C3 oxygenated byproducts, including acetaldehyde and formaldehyde.
  • No large oxidation products were identified.

Conclusions:

  • Ethanol, a common indoor VOC, can be efficiently converted to harmful byproducts by oxidation-based air cleaners.
  • The study underscores the need to consider ethanol's role in evaluating air cleaner risks and benefits.
  • Real-world VOC mixtures present complex challenges for air cleaning technologies.