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Radical Autoxidation01:20

Radical Autoxidation

2.2K
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...
2.2K
Oxidation Numbers03:14

Oxidation Numbers

37.7K
In redox reactions, the transfer of electrons occurs between reacting species. Electron transfer is described by a hypothetical number called the oxidation number (or oxidation state). It represents the effective charge of an atom or element, which is assigned using a set of rules.
37.7K
Oxidation and Reduction of Organic Molecules01:19

Oxidation and Reduction of Organic Molecules

7.1K
Energy production within a cell involves many coordinated chemical pathways. Most of these pathways are combinations of oxidation and reduction reactions, which occur at the same time. An oxidation reaction strips an electron from an atom in a compound, and the addition of this electron to another compound is a reduction reaction. Because oxidation and reduction usually occur together, these pairs of reactions are called redox reactions.
The removal of an electron from a molecule, results in a...
7.1K
Oxidation of Phenols to Quinones01:17

Oxidation of Phenols to Quinones

3.4K
In the presence of oxidizing agents, phenols are oxidized to quinones. Quinones can be easily reduced back to phenols using mild reducing agents. The electron-donating hydroxyl group enhances the reactivity of the aromatic ring, enabling oxidation of the ring even in the absence of an α hydrogen.
o-hydroxy phenols are oxidized to o-quinones and p-hydroxy phenols to p-quinones. Such redox reactions involve the transfer of two electrons and two protons. The reversible redox...
3.4K
Oxidation-Reduction Reactions03:11

Oxidation-Reduction Reactions

65.6K
Oxidation–Reduction Reactions
65.6K
Oxidation of Alkenes: Syn Dihydroxylation with Potassium Permanganate02:21

Oxidation of Alkenes: Syn Dihydroxylation with Potassium Permanganate

12.6K
Alkenes can be dihydroxylated using potassium permanganate.  The method encompasses the reaction of an alkene with a cold, dilute solution of potassium permanganate under basic conditions to form a cis-diol along with a brown precipitate of manganese dioxide.
12.6K

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Updated: Aug 30, 2025

Original Experimental Approach for Assessing Transport Fuel Stability
09:48

Original Experimental Approach for Assessing Transport Fuel Stability

Published on: October 21, 2016

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人間の酸化場

Nora Zannoni1, Pascale S J Lakey2, Youngbo Won3

  • 1Atmospheric Chemistry Department, Max Planck Institute for Chemistry, Mainz, Germany.

Science (New York, N.Y.)
|September 1, 2022
PubMed
まとめ
この要約は機械生成です。

オゾンに曝された人間の皮膚は,高濃度のヒドロキシル (OH) ラジカルを生成し,室内の酸化フィールドを生成します. この発見は室内の空気の質と人間の健康に 影響を及ぼします

さらに関連する動画

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

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Enabling Real-Time Compensation in Fast Photochemical Oxidations of Proteins for the Determination of Protein Topography Changes
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Enabling Real-Time Compensation in Fast Photochemical Oxidations of Proteins for the Determination of Protein Topography Changes

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関連する実験動画

Last Updated: Aug 30, 2025

Original Experimental Approach for Assessing Transport Fuel Stability
09:48

Original Experimental Approach for Assessing Transport Fuel Stability

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

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Enabling Real-Time Compensation in Fast Photochemical Oxidations of Proteins for the Determination of Protein Topography Changes
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Enabling Real-Time Compensation in Fast Photochemical Oxidations of Proteins for the Determination of Protein Topography Changes

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科学分野:

  • 環境化学
  • 大気化学
  • 室内の空気の質

背景:

  • ハイドロキシル (OH) ラジカルは大気汚染物質の主要な酸化物質です.
  • 以前の研究では,屋内でのヒト誘発 OH 基の生成を完全に特徴づけることができませんでした.
  • オゾンへの曝露は屋内環境では一般的です.

研究 の 目的:

  • 人間がオゾンに曝される時に発生する OH ラジカルを調査する.
  • OHラジカルの濃度を定量化し,その形成メカニズムを理解する.
  • 人為的なOHフィールドの空間的な範囲と影響要因をモデル化します.

主な方法:

  • 人間をオゾンにさらした 制御された気候室の実験
  • 総OH反応性,アルケーン,酸化産物の測定
  • 実験データを化学的に明示的なモデルと比較する.
  • OHラジカルの空間的分布を評価するためのダイナミックモデリング.

主要な成果:

  • オゾン被曝中に高濃度のOHラジカルが観察された.
  • オゾン-スクワレンの反応で形成される6-メチル-5-ヘプテン-2-オン (6-MHO) は,主要なOH前駆体として特定された.
  • 実験的なOH濃度はモデル予測と一致している.
  • 人によって生み出されたOHフィールドはオゾン流入に依存することが示された.

結論:

  • ヒトの皮膚はオゾンにさらされるとOHラジカルを生成します.
  • この過程で局所的な酸化場が形成され 室内の化学反応に影響を与えます
  • この現象を理解することは,室内の化学物質の寿命と人間の健康への影響を評価するために不可欠です.