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関連する概念動画

The Antenna Complex01:15

The Antenna Complex

6.9K
Plants and other photosynthetic organisms comprise pigments capable of absorption of direct sunlight. These pigments are present in the reaction center - the main site of photochemical reactions as well as in the antenna complex. Under average light conditions, the rate at which reaction center pigments absorb light is far below the electron transport chain's capacity. As a result, the reaction center alone cannot provide enough energy to drive photosynthesis. The photosynthetic efficiency can...
6.9K
The Z-Scheme of Electron Transport in Photosynthesis01:34

The Z-Scheme of Electron Transport in Photosynthesis

12.5K
The light reactions of photosynthesis assume a linear flow of electrons from water to NADP+. During this process, light energy drives the splitting of water molecules to produce oxygen. However, oxidation of water molecules is a thermodynamically unfavorable reaction and requires a strong oxidizing agent. This is accomplished by the first product of light reactions: oxidized P680 (or P680+), the most powerful oxidizing agent known in biology. The oxidized P680 that acquires an electron from the...
12.5K
The Photochemical Reaction Center01:29

The Photochemical Reaction Center

4.3K
Reaction centers are pigment-protein complexes that initiate energy conversion from photons to chemical entities. Therefore, photochemical reaction center is a more appropriate term that describes these complexes. The Nobel laureates Robert Emerson and William Arnold provided the first experimental evidence of photochemical reaction centers by demonstrating the participation of nearly 2,500 chlorophyll molecules for the release of just one molecule of oxygen. Despite thousands of photosynthetic...
4.3K
Electron Transport Chains01:28

Electron Transport Chains

85.2K
The final stage of cellular respiration is oxidative phosphorylation that consists of two steps: the electron transport chain and chemiosmosis. The electron transport chain is a set of proteins found in the inner mitochondrial membrane in eukaryotic cells. Its primary function is to establish a proton gradient that can be used during chemiosmosis to produce ATP and generate electron carriers, such as NAD+ and FAD, that are used in glycolysis and the citric acid cycle.
The ETC is comprised of...
85.2K
Electron Transport Chain: Complex III and IV01:43

Electron Transport Chain: Complex III and IV

6.7K
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...
6.7K
Photosystem II01:22

Photosystem II

59.7K
The multi-protein complex photosystem II (PS II) harvests photons and transfers their energy through its bound pigments to its reaction center, and ultimately to photosystem I (PSI) through the electron transport chain. The pigments responsible for caputirng the light energy in photosystems include chlorophyll a, chlorophyll b, and carotenoids.
The pigment molecules are arranged across  two photosystem domains — the antenna complex and the reaction center. The main aim of the pigment...
59.7K

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関連する実験動画

Updated: Apr 24, 2026

Developing Photosensitizer-Cobaloxime Hybrids for Solar-Driven H2 Production in Aqueous Aerobic Conditions
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太陽光変換触媒としてのマルチヘムフラボ酵素.

Andreas Bachmeier1, Bonnie J Murphy, Fraser A Armstrong

  • 1Inorganic Chemistry Laboratory, Department of Chemistry, University of Oxford , South Parks Road, Oxford OX1 3QR, United Kingdom.

Journal of the American Chemical Society
|September 10, 2014
PubMed
まとめ
この要約は機械生成です。

人工光合成は,酵素フラボサイトクロームc3 (fcc3) を用いて,光エネルギーを価値ある有機化学物質であるサクシネートに変換する. このシステムは,単純な燃料を超えて太陽光駆動合成を進めている.

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CO2 Photoreduction to CH4 Performance Under Concentrating Solar Light
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CO2 Photoreduction to CH4 Performance Under Concentrating Solar Light

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Integrating a Triplet-triplet Annihilation Up-conversion System to Enhance Dye-sensitized Solar Cell Response to Sub-bandgap Light
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関連する実験動画

Last Updated: Apr 24, 2026

Developing Photosensitizer-Cobaloxime Hybrids for Solar-Driven H2 Production in Aqueous Aerobic Conditions
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Developing Photosensitizer-Cobaloxime Hybrids for Solar-Driven H2 Production in Aqueous Aerobic Conditions

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CO2 Photoreduction to CH4 Performance Under Concentrating Solar Light
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CO2 Photoreduction to CH4 Performance Under Concentrating Solar Light

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Integrating a Triplet-triplet Annihilation Up-conversion System to Enhance Dye-sensitized Solar Cell Response to Sub-bandgap Light
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科学分野:

  • 人工光合成による合成です.
  • バイオ・オーガニック化学
  • 太陽光発電のエネルギー変換

背景:

  • 酵素触媒は,化学合成のための持続可能な経路を提供します.
  • 人工光合成は,エネルギーと化学物質の生産のための自然のプロセスを模倣することを目的としています.
  • フラボサイトクロームc3 (fcc3) は,水素化反応を触媒化する酵素である.

研究 の 目的:

  • 太陽光発電によるサクシネート生産のための人工光合成システムでfcc3を使用する.
  • 効率的な太陽光から化学物質への変換のための光電化学セルを開発する.
  • 再生可能エネルギーを用いて有機化学物質の合成を調査する.

主な方法:

  • fcc3を染料感受性TiO2ナノ粒子に固定する.
  • 改造された電極 (インジウム亜鉛酸化物とBiVO4) を使った光電化学セルの構築.
  • サクシネート製造のための水分サスペンションの可視光照射.

主要な成果:

  • 可視光によるサッキナート生成は,固定されたfcc3.3によって成功裏に触媒化されました.
  • 光電気化学電池は,中性水を酸化剤として使用して,太陽から化学への変換を達成しました.
  • fcc3を太陽エネルギー駆動の有機商品の合成に使用する可能性を実証した.

結論:

  • 酵素ベースの人工光合成は,価値ある有機化学物質を生産するための実行可能な戦略です.
  • この研究は,化学品や材料の太陽エネルギー駆動合成のための新しい道を開きます.
  • 開発されたシステムは,単純な燃料生産を超えて,複雑な有機合成に向かっています.