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関連する概念動画

Hydrogen Bonds00:26

Hydrogen Bonds

127.0K
Hydrogen bonds are weak attractions between atoms that have formed other chemical bonds. One of these atoms is electronegative, like oxygen, and has a partial negative charge. The other is a hydrogen atom that has bonded with another electronegative atom and has a partial positive charge.
Hydrogen Bonds Control the World!
Because hydrogen has very weak electronegativity when it binds with a strongly electronegative atom, such as oxygen or nitrogen, electrons in the bond are unequally shared....
127.0K
Induced-fit Model01:13

Induced-fit Model

83.2K
Most chemical reactions in cells require enzymes—biological catalysts that speed up the reaction without being consumed or permanently changed. They reduce the activation energy needed to convert the reactants into products. Enzymes are proteins, that usually work by binding to a substrate—a reactant molecule that they act upon.
Enzymes exhibit substrate specificity, meaning that they can only bind to certain substrates. This is mainly determined by the shape and chemical...
83.2K
Coupled Reactions01:17

Coupled Reactions

8.7K
Cellular processes such as building and breaking down complex molecules occur through stepwise chemical reactions. Some of these chemical reactions are spontaneous and release energy, whereas others require energy to proceed. Cells often couple the energy-releasing reaction with the energy-requiring one to carry out important cell functions. 
Energy in adenosine triphosphate or ATP molecules is easily accessible to do work. ATP powers the majority of energy-requiring cellular reactions....
8.7K
Noncovalent Attractions in Biomolecules02:35

Noncovalent Attractions in Biomolecules

57.8K
Noncovalent attractions are associations within and between molecules that influence the shape and structural stability of complexes. These interactions differ from covalent bonding in that they do not involve sharing of electrons.
Four types of noncovalent interactions are hydrogen bonds, van der Waals forces, ionic bonds, and hydrophobic interactions.
Hydrogen bonding results from the electrostatic attraction of a hydrogen atom covalently bonded to a strong-electronegative atom like oxygen,...
57.8K
Cooperative Allosteric Transitions01:58

Cooperative Allosteric Transitions

8.1K
Cooperative allosteric transitions can occur in multimeric proteins, where each subunit of the protein has its own ligand-binding site. When a ligand binds to any of these subunits, it triggers a conformational change that affects the binding sites in the other subunits; this can change the affinity of the other sites for their respective ligands. The ability of the protein to change the shape of its binding site is attributed to the presence of a mix of flexible and stable segments in the...
8.1K
Reduction of Alkenes: Asymmetric Catalytic Hydrogenation02:17

Reduction of Alkenes: Asymmetric Catalytic Hydrogenation

3.5K
Catalytic hydrogenation of alkenes is a transition-metal catalyzed reduction of the double bond using molecular hydrogen to give alkanes. The mode of hydrogen addition follows syn stereochemistry.
The metal catalyst used can be either heterogeneous or homogeneous. When hydrogenation of an alkene generates a chiral center, a pair of enantiomeric products is expected to form. However, an enantiomeric excess of one of the products can be facilitated using an enantioselective reaction or an...
3.5K

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関連する実験動画

Updated: Oct 3, 2025

Protein Film Infrared Electrochemistry Demonstrated for Study of H2 Oxidation by a [NiFe] Hydrogenase
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Protein Film Infrared Electrochemistry Demonstrated for Study of H2 Oxidation by a [NiFe] Hydrogenase

Published on: December 4, 2017

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バイディレクショナル・バイオインスピレーション [FeFe]-ヒドロゲネーゼモデル

Md Estak Ahmed1, Abhijit Nayek1, Alenka Križan2

  • 1School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A & 2B Raja S.C. Mullick Road, Jadavpur, Kolkata, India 700032.

Journal of the American Chemical Society
|February 21, 2022
PubMed
まとめ

[FeFe]ヒドロゲネーゼに触発された新しい鉄基触媒は,水素と陽子を効率的に変換します. 持続可能なエネルギーと燃料電池の ルールを変えるものです

さらに関連する動画

Expression, Purification, Crystallization, and Enzyme Assays of Fumarylacetoacetate Hydrolase Domain-Containing Proteins
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Expression, Purification, Crystallization, and Enzyme Assays of Fumarylacetoacetate Hydrolase Domain-Containing Proteins

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Hydrogen Production and Utilization in a Membrane Reactor
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Hydrogen Production and Utilization in a Membrane Reactor

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関連する実験動画

Last Updated: Oct 3, 2025

Protein Film Infrared Electrochemistry Demonstrated for Study of H2 Oxidation by a [NiFe] Hydrogenase
10:01

Protein Film Infrared Electrochemistry Demonstrated for Study of H2 Oxidation by a [NiFe] Hydrogenase

Published on: December 4, 2017

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Expression, Purification, Crystallization, and Enzyme Assays of Fumarylacetoacetate Hydrolase Domain-Containing Proteins
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Expression, Purification, Crystallization, and Enzyme Assays of Fumarylacetoacetate Hydrolase Domain-Containing Proteins

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Hydrogen Production and Utilization in a Membrane Reactor
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Hydrogen Production and Utilization in a Membrane Reactor

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科学分野:

  • 持続可能なエネルギー技術
  • 電気触媒
  • バイオ有機化学

背景:

  • 水素 (H2) 技術は持続可能なエネルギーの未来をもたらしますが,燃料電池には効率的な触媒が必要です.
  • プラチナ群の金属は,H2の相互変換のための効果的な,しかし高価な触媒です.
  • バイオインスピレーションは 新しく費用対効果の高い 触媒の代替手段を 発見する道を開きます

研究 の 目的:

  • 水素の相互変換のための新しい,効率的で費用対効果の高い電気触媒を開発する.
  • [FeFe]ヒドロゲネーゼ活性部位をベースにした生物触媒を研究する.
  • これらの触媒を機能的な膜のないH2 / O2燃料電池に実装します.

主な方法:

  • 新しい鉄基触媒の設計と合成
  • H2と陽子の相互変換のための触媒活動の電気化学的特徴.
  • 膜のないH2/O2燃料電池装置に触媒を導入する.

主要な成果:

  • [FeFe]ヒドロゲネーゼに触発された新種の鉄基触媒は,双方向の電気触媒活性を示した.
  • H2と陽子の効率的な相互変換は,ほぼ中性な水性条件下で達成された.
  • バイオインスピレーションによる触媒は,機能的な膜のないH2 / O2燃料電池にうまく統合されました.

結論:

  • バイオインスピレーションによる鉄基触媒は,プラチナ基金属の効率的で費用対効果の高い代替品として有望である.
  • これらの触媒は持続可能な水素エネルギーシステムと燃料電池の応用を促進します.
  • 開発された触媒は,クリーンエネルギー変換のための電気触媒設計における重要な進歩を表しています.