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関連する概念動画

Nuclear Export01:42

Nuclear Export

5.0K
The nucleus restricts several proteins within and allows others to pass. The restricted proteins possess a nuclear retention sequence or NRS, anchoring them to the nuclear lamins and preventing their transport to the cytosol. The non-restricted proteins, after their synthesis, are transported to their site of action, such as the cytosol or other organelles, with the help of nuclear export signals or NES.
NES are of three types- the canonical 10-residue long leucine-rich signal and other...
5.0K
Classifying Matter by State02:49

Classifying Matter by State

104.8K
Chemistry is the study of matter and the changes it undergoes. Matter is anything that has mass and occupies space. Matter is all around us; the air, water, soil, mountains, even our bodies are all examples of matter. Matter is divided into three states — solid, liquid, and gas — that are commonly found on earth. The fourth state of matter, plasma, occurs naturally in the interiors of stars. 
104.8K
Export of Mitochondrial and Chloroplast Genes02:19

Export of Mitochondrial and Chloroplast Genes

4.2K
A eukaryotic cell can have up to three different types of genetic systems: nuclear, mitochondrial, and chloroplast. During evolution, organelles have exported many genes to the nucleus; this transfer is still ongoing in some plant species. Approximately 18% of the Arabidopsis thaliana nuclear genome is thought to be derived from the chloroplast’s cyanobacterial ancestor, and around 75% of the yeast genome derived from the mitochondria’s bacterial ancestor. This export has occurred...
4.2K
Nuclear Export of mRNA02:31

Nuclear Export of mRNA

5.5K
5.5K
Nuclear Export of mRNA02:31

Nuclear Export of mRNA

8.8K
Before mRNAs are exported to the cytoplasm, it is crucial to check each mRNA for structural and functional integrity. Eukaryotic cells use several different mechanisms, collectively known as mRNA surveillance, to look for irregularities in mRNAs. Irregular or aberrant mRNA are rapidly degraded by various enzymes. If a defective mRNA escapes the surveillance, it would be translated into a protein which would either be non-functional or not function properly. One of the primary irregularities in...
8.8K
Classifying Matter by Composition03:35

Classifying Matter by Composition

91.7K
Matter: Pure Substances and Mixtures
According to its composition, the matter can be classified into two broad categories — pure substances and mixtures. 
A pure substance is a form of matter that has a constant composition throughout with uniform properties. For example, any sample of sucrose has the same composition and same physical properties, such as melting point, color, and sweetness, regardless of the source from which it is isolated. 
A mixture is composed of two or...
91.7K

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関連する実験動画

Updated: Feb 13, 2026

Electrostatic Method to Remove Particulate Organic Matter from Soil
04:40

Electrostatic Method to Remove Particulate Organic Matter from Soil

Published on: February 10, 2021

5.3K

大陸棚は有機物質を 輸出していますか?

G T Rowe, S Smith, P Falkowski

    Nature
    |March 9, 2018
    PubMed
    まとめ

    沿岸の海洋生態系では 植物プランクトンの90%は 輸出されません 大半の有機炭素は大陸棚で消費され 沖合に隔離されず 以前の輸出仮説に異議を唱えます

    科学分野:

    • 海洋生態学
    • 生地化学のサイクル
    • 海洋学

    背景:

    • 沿岸の海洋生態系では 有機物質の生産と消費が不均衡である可能性があります
    • ある仮説によると 春の植物プランクトンの90%は 輸出され 大陸の斜面に炭素を閉じ込めます

    研究 の 目的:

    • 大陸シェルフから 有機炭素を大量に輸出するという仮説を検証する.
    • 沿岸の海洋環境における有機物質の生産と消費のバランスを調査する.

    主な方法:

    • シェルフエッジ交換プロセス (SEEP) 実験の結果を要約します
    • 大陸の斜面の有機炭素や 堆積物やバイオマスを分析する

    主要な成果:

    • シェルフ・エッジ・エクスチェンジ・プロセス (SEEP) 実験では,有機炭素予算の正の不均衡は見つかりませんでした.
    • 大陸の斜面の堆積物とバイオマスは控えめで,大規模な輸出を支えない.
    • 大陸シェルフのフィトデトリトスの一部は輸出され,大半はシェルフで消費される.

    結論:

    • 植物プランクトンの90%が輸出されているという仮説は否定される.

    さらに関連する動画

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    Understanding Dissolved Organic Matter Biogeochemistry Through In Situ Nutrient Manipulations in Stream Ecosystems
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    Understanding Dissolved Organic Matter Biogeochemistry Through In Situ Nutrient Manipulations in Stream Ecosystems

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    関連する実験動画

    Last Updated: Feb 13, 2026

    Electrostatic Method to Remove Particulate Organic Matter from Soil
    04:40

    Electrostatic Method to Remove Particulate Organic Matter from Soil

    Published on: February 10, 2021

    5.3K
    Production and Measurement of Organic Particulate Matter in a Flow Tube Reactor
    13:29

    Production and Measurement of Organic Particulate Matter in a Flow Tube Reactor

    Published on: December 15, 2018

    8.0K
    Understanding Dissolved Organic Matter Biogeochemistry Through In Situ Nutrient Manipulations in Stream Ecosystems
    09:38

    Understanding Dissolved Organic Matter Biogeochemistry Through In Situ Nutrient Manipulations in Stream Ecosystems

    Published on: October 29, 2016

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  • ペラジック微生物の消費と 季節的な生産消費の遅れは有機炭素循環の重要な要因です
  • 有機物質は主に大陸棚の生態系内で消費されます.