関連する実験動画

Updated: Jul 11, 2026

Light-driven Enzymatic Decarboxylation
09:58

Light-driven Enzymatic Decarboxylation

Published on: May 22, 2016

太陽光にさらされた地表水と地下水で過酸化水素の光化学的形成

W J Cooper, R G Zika

    Science (New York, N.Y.)
    |May 13, 1983
    PubMed
    まとめ

    太陽光は天然の水中で素酸化水素を素早く生成します. この光化学的プロセスは,水素物質によって駆動され,主要な前駆体であるスーパーオキシードアニオンから発生します.

    さらに関連する動画

    Experimental Methods for Efficient Solar Hydrogen Production in Microgravity Environment11:38

    Experimental Methods for Efficient Solar Hydrogen Production in Microgravity Environment

    Published on: December 3, 2019

    Developing Photosensitizer-Cobaloxime Hybrids for Solar-Driven H2 Production in Aqueous Aerobic Conditions10:21

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

    Published on: October 5, 2019

    関連する概念動画

    Photosystem II01:22

    Photosystem II

    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 molecules...
    The Z-Scheme of Electron Transport in Photosynthesis01:34

    The Z-Scheme of Electron Transport in Photosynthesis

    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...
    Autoxidation of Ethers to Peroxides and Hydroperoxides02:23

    Autoxidation of Ethers to Peroxides and Hydroperoxides

    Ethers represent a class of chemical compounds that become more dangerous with prolonged storage because they tend to form explosive peroxides when standing in the air. Autoxidation is the spontaneous oxidation of a compound in air. In the presence of oxygen, ethers slowly oxidize to form hydroperoxides and dialkyl peroxides.
    Radical Autoxidation01:20

    Radical Autoxidation

    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...
    Oxygenic Photosynthesis01:26

    Oxygenic Photosynthesis

    Oxygenic photosynthesis is a fundamental process in which light energy is harnessed to drive the oxidation of water, leading to the production of molecular oxygen (O₂), adenosine triphosphate (ATP), and nicotinamide adenine dinucleotide phosphate (NADPH). This process is essential for sustaining aerobic life on Earth and is primarily carried out by cyanobacteria, algae, and plants. The core of oxygenic photosynthesis lies in the thylakoid membranes, where chlorophyll pigments facilitate light...
    Origin of Photosynthesis01:26

    Origin of Photosynthesis

    Photosynthesis represents a fundamental biological process that transformed Earth's atmosphere and paved the way for complex life. Emerging roughly 3.4–3.8 billion years ago, the earliest photosynthetic organisms harnessed light energy to produce organic compounds. These anoxygenic phototrophs used electron donors like hydrogen sulfide (H₂S) or ferrous iron (Fe²⁺), rather than water, and did not release molecular oxygen (O₂) as a byproduct. Various groups, including green sulfur and purple...