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Oxidation-Reduction Reactions03:11

Oxidation-Reduction Reactions

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Oxidation–Reduction Reactions
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Electron Transport Chain: Complex III and IV01:43

Electron Transport Chain: Complex III and IV

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During the electron transport chain, electrons from NADH and FADH2 are first transferred to complexes I and II, respectively. These two complexes then transfer the electrons to ubiquinol, which carries them further to complex III. Complex III passes the electrons across the intermembrane space to Cyt c, which carries them further to complex IV. Complex IV donates electrons to oxygen and reduces it to water. As electrons pass through complexes I, III, and IV, the energy released aids the pumping...
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Redox Equilibria: Overview01:23

Redox Equilibria: Overview

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A reduction-oxidation reaction is commonly called a redox reaction. In a redox reaction, electrons are transferred from one species to another rather than being shared between or among atoms. The reducing agent or reductant is the species that loses electrons and gets oxidized in the process. The species that gains electrons and gets reduced in the process is the oxidizing agent or oxidant. Redox reactions are represented as two separate equations called half-reactions, where one equation...
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Redox Titration: Other Oxidizing and Reducing Agents01:26

Redox Titration: Other Oxidizing and Reducing Agents

1.3K
Besides iodine, other oxidizing or reducing agents can serve as titrants in redox titrations. Common oxidizing titrants include KMnO4, cerium(IV), and K2Cr2O7. The choice of oxidizing titrants depends on factors like stability, cost, analyte strength, and reaction rate between the analyte and titrant. KMnO4 is a strong oxidizing titrant that reduces from Mn(VII) to Mn(II) in a highly acidic solution, simultaneously oxidizing the analyte to a higher oxidation state. In this case, KMnO4 acts as a...
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Oxidation and Reduction of Organic Molecules01:19

Oxidation and Reduction of Organic Molecules

8.0K
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...
8.0K
Redox Reactions01:24

Redox Reactions

50.8K
Oxidation-reduction or redox reactions involve the transfer of electrons from one molecule or atom to another. When an atom gains an electron, another atom must lose an electron, meaning oxidation and reduction must occur together. Since the redox occurs in pairs, the atom that gets oxidized is also called the reducing agent or reductant, and the atom that is reduced is also called the oxidizing agent or oxidant. A straightforward way to remember the definitions of oxidation and reduction is...
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Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction
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マルチコッパーオキシダースカトドのダイオキシゲン還元モデリング

Peter Agbo1, James R Heath, Harry B Gray

  • 1Beckman Institute, Noyes Laboratory of Chemical Physics, California Institute of Technology , Pasadena, California 91125, United States.

Journal of the American Chemical Society
|September 5, 2014
PubMed
まとめ
この要約は機械生成です。

私たちは,電極と酵素の運動を組み合わせた,マルチコッパー酸化酵素 (MCO) カトドの運動モデルを開発しました. このモデルは,効率的なMCOカトドの設計とアクティブサイト特性の推定に役立ちます.

さらに関連する動画

Anaerobic Protein Purification and Kinetic Analysis via Oxygen Electrode for Studying DesB Dioxygenase Activity and Inhibition
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Developing Photosensitizer-Cobaloxime Hybrids for Solar-Driven H2 Production in Aqueous Aerobic Conditions
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科学分野:

  • 電気化学 電気化学について
  • バイオカタリシス バイオカタリシス
  • 化学動力学 化学動力学

背景:

  • マルチコッパーオキシダース (MCOs) は,ダイオキシゲン減少のための重要な生物触媒です.
  • MCO カソードにおける電子伝送 (ET) の運動学を理解することは,その効率を改善するために不可欠です.
  • 現在のモデルは,電極と酵素運動の複雑な相互作用をしばしば簡素化しています.

研究 の 目的:

  • MCO カソードにおける触媒による二酸化炭素還元のための一般的運動モデルを開発する.
  • バトラー-ヴォルマー (BV) 電極運動とマイケリス-メンテン (MM) 酵素形式主義を統合する.
  • より効率的なMCOベースの電気化学システムを設計するための枠組みを提供する.

主な方法:

  • バトラー-ヴォルマー (BV) とマイケリス-メンテン (MM) の運動を統合して,統一速度方程式にします.
  • 組み込みインターフェイス電子転送 (ET) および分子内ETプロセス.
  • Thermus thermophilus laccase.の実験的電気化学データを用いてモデルを検証しました.

主要な成果:

  • ダイオキシゲン結合を考慮して,MCO カソード運動の分析式を開発した.
  • モデルを実験データと比較し,その予測力を実証しました.
  • このモデルは,電子コップリングとアクティブサイトから基板までの距離を推定します.

結論:

  • 提案された一般運動学モデルは,MCO カソードでのダイオキシゲン減少を正確に記述しています.
  • このモデルは,MCO カソッドの設計と性能を最適化するための貴重なツールです.
  • MCOシステムにおける主要な触媒パラメータの定量評価を容易にする.