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関連する概念動画

The Carbon Cycle01:14

The Carbon Cycle

43.1K
Carbon is the basis of all organic matter on Earth, and is recycled through the ecosystem in two primary processes: one in which carbon is exchanged among living organisms, and one in which carbon is cycled over long periods of time through fossilized organic remains, weathering of rocks, and volcanic activity. Human activities, including increased agricultural practices and the burning of fossil fuels, has greatly affected the balance of the natural carbon cycle.
43.1K
Carbon-dioxide Fixation01:28

Carbon-dioxide Fixation

617
Carbon dioxide fixation in prokaryotes enables the assimilation of inorganic carbon into organic molecules, supporting biosynthetic pathways, sustaining ecosystems, and contributing to the global carbon cycle. It also has industrial applications in carbon capture and bioproduct synthesis. Autotrophic organisms rely on this process to utilize CO₂ as a carbon source in diverse environments.The Calvin CycleThe Calvin cycle is the most widespread carbon fixation mechanism, primarily used by...
617
Bioremediation00:46

Bioremediation

22.0K
Bioremediation is the use of prokaryotes, fungi, or plants to remove pollutants from the environment. This process has been used to remove harmful toxins in groundwater as a byproduct of agricultural run-off and also to clean up oil spills.
22.0K
Carbon Dioxide Transport in the Blood01:19

Carbon Dioxide Transport in the Blood

4.5K
Carbon dioxide (CO2) transport in the blood is critical to human physiology. On average, our body cells produce around 200 mL of CO2 per minute, precisely the quantity expelled by the lungs. This process involves the transportation of CO2 from the tissue cells to the lungs in three primary forms.
Forms of CO2 Transport
1. Dissolved in plasma: A small percentage (7-10%) of CO2 is transported and dissolved directly in the plasma.
2. Carbaminohemoglobin: Just over 20% of CO2 is chemically bound to...
4.5K
Limiting Reactant02:27

Limiting Reactant

69.2K
The relative amounts of reactants and products represented in a balanced chemical equation are often referred to as stoichiometric amounts. However, in reality, the reactants are not always present in the stoichiometric amounts indicated by the balanced equation.
69.2K
The Calvin Benson Cycle01:46

The Calvin Benson Cycle

5.8K
Ribulose 1,5- bisphosphate carboxylase/oxygenase (RuBisCo) is a critical enzyme that catalyzes carbon dioxide assimilation during photosynthesis. However, it is an inefficient enzyme, having an extremely slow catalytic rate. A typical enzyme can process about a thousand molecules per second; however, RuBisCo fixes only around three-carbon dioxides per second. Photosynthetic cells compensate for this slow rate by synthesizing very high amounts of RuBisCo, making it the most abundant single...
5.8K

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関連する実験動画

Updated: Jan 13, 2026

Design and Use of a Full Flow Sampling System FFS for the Quantification of Methane Emissions
08:18

Design and Use of a Full Flow Sampling System FFS for the Quantification of Methane Emissions

Published on: June 12, 2016

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一時的な二酸化炭素除去によるメタン排出量のオフセット

Frank Venmans1, Wilfried Rickels2, Ben Groom1,3

  • 1Grantham Research Institute on Climate Change and the Environment, London School of Economics and Political Science, London, UK.

Nature climate change
|January 12, 2026
PubMed
まとめ

メタン排出量は二酸化炭素とは異なり、短期的な温暖化を引き起こします。一時的なCO2除去は、メタンの温暖化影響を相殺し、長期的な経済移転を回避し、より信頼性の高い気候政策を保証することができます。

科学分野:

  • 気候科学
  • 環境経済学
  • 大気化学

背景:

  • メタン（CH4）は、二酸化炭素（CO2）と比較して、強力な短期的な温暖化ポテンシャルを持っています。
  • 温室効果ガス排出量とその気候影響の時間的ダイナミクスは、効果的な緩和戦略にとって重要です。
  • 現在のオフセットメカニズムは、ガス間の温暖化効果の異なる時間スケールを見落としていることがよくあります。

研究 の 目的:

  • 一時的な二酸化炭素（CO2）除去がメタン（CH4）排出量の短期的な気候影響を相殺する有効性を評価すること。
  • 1トンのメタンの温暖化効果を均衡させるために必要な一時的なCO2オフセットの量を決定すること。
  • 世代間の厚生移転と政策の執行可能性に対する時間的整合性の影響を評価すること。

主な方法:

  • メタンと二酸化炭素の短期的な温度効果の比較分析。
  • 回避された気候損害に基づく同等性を評価するための経済モデリング。
  • 社会的割引率や将来の排出シナリオなどのパラメータの影響を評価するための感度分析。

主要な成果:

  • 回避された経済的損害に基づき、30年間で約87件の一時的なCO2除去が必要であり、1トンのメタンを相殺します。
  • メタンの温暖化インパルスに一時的に一致するCO2除去は、世代間の厚生移転を最小化します。
キーワード:
気候変動政策環境経済学

さらに関連する動画

Measuring Carbon-based Contaminant Mineralization Using Combined CO2 Flux and Radiocarbon Analyses
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Measuring Carbon-based Contaminant Mineralization Using Combined CO2 Flux and Radiocarbon Analyses

Published on: October 21, 2016

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Author Spotlight: Standardizing the Development of Amine-Based Silica Composites as CO2 Adsorbents for Direct Air Capture
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Author Spotlight: Standardizing the Development of Amine-Based Silica Composites as CO2 Adsorbents for Direct Air Capture

Published on: September 29, 2023

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関連する実験動画

Last Updated: Jan 13, 2026

Design and Use of a Full Flow Sampling System FFS for the Quantification of Methane Emissions
08:18

Design and Use of a Full Flow Sampling System FFS for the Quantification of Methane Emissions

Published on: June 12, 2016

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Measuring Carbon-based Contaminant Mineralization Using Combined CO2 Flux and Radiocarbon Analyses
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Measuring Carbon-based Contaminant Mineralization Using Combined CO2 Flux and Radiocarbon Analyses

Published on: October 21, 2016

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Author Spotlight: Standardizing the Development of Amine-Based Silica Composites as CO2 Adsorbents for Direct Air Capture
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  • 必要なCO2オフセット量は、論争の多い経済的および気候的パラメータの変動に対して堅牢です。
  • CO2除去プロジェクトの短期的な監視（20〜30年）は、長期的な要件よりも実行可能で執行可能です。

    • 結論:

    • 一時的なCO2除去は、メタン排出量からの短期的な温暖化に対抗するための実行可能な戦略を提供します。
    • このアプローチは、論争の多いパラメータへの依存を減らすことによって、オフセット契約を簡素化します。
    • 短期的な執行可能な監視期間に焦点を当てることは、自然ベースのCO2除去プロジェクトの信頼性と実用性を高めます。