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Clot Retraction and Fibrinolysis01:16

Clot Retraction and Fibrinolysis

After a fibrin clot is formed, the next step is clot retraction, a vital process facilitated by platelet contractile proteins, such as actin and myosin. These proteins pull the fibrin strands closer together and condense the clot. This action reduces the size of the clot, creating a smaller, denser structure that effectively seals off the damaged vessel. Clot retraction consolidates the clot and helps with wound healing by bringing the edges of the damaged blood vessel closer together.
Alterations in Respiration II01:30

Alterations in Respiration II

There are numerous types of normal and abnormal respiration. Based on ventilatory movements, breathing patterns are classified as regular, deep, or shallow. Examples include Biot's breathing, Cheyne-Stokes respiration, Kussmaul's breathing, hyperventilation, and hypoventilation. Each pattern is clinically significant and aids in evaluating patients.
In Biot's breathing, the respiratory rate and depth are irregular, alternating between periods of deep gasping and apnea. Common causes include...
Repressible Operon: trp Operon01:21

Repressible Operon: trp Operon

The trp operon in Escherichia coli exemplifies a repressible operon. It regulates the synthesis of tryptophan through repressor-mediated transcriptional control and attenuation. This dual regulatory mechanism ensures tryptophan biosynthesis occurs only when needed, conserving cellular resources.Structure of the trp OperonThe trp operon consists of five structural genes (trpE, trpD, trpC, trpB, and trpA) that encode enzymes for tryptophan biosynthesis. These genes are transcribed as a single...
Proofreading01:43

Proofreading

Synthesis of new DNA molecules starts when DNA polymerase links nucleotides together in a sequence that is complementary to the template DNA strand. DNA polymerase has a higher affinity for the correct base to ensure fidelity in DNA replication. The DNA polymerase furthermore proofreads during replication, using an exonuclease domain that cuts off incorrect nucleotides from the nascent DNA strand.Errors during Replication Are Corrected by the DNA Polymerase EnzymeGenomic DNA is synthesized in...
Proofreading01:43

Proofreading

Synthesis of new DNA molecules starts when DNA polymerase links nucleotides together in a sequence that is complementary to the template DNA strand. DNA polymerase has a higher affinity for the correct base to ensure fidelity in DNA replication. The DNA polymerase furthermore proofreads during replication, using an exonuclease domain that cuts off incorrect nucleotides from the nascent DNA strand.Errors during Replication Are Corrected by the DNA Polymerase EnzymeGenomic DNA is synthesized in...
Proofreading01:31

Proofreading

Synthesis of new DNA molecules is carried out by the enzyme DNA polymerase, which adds nucleotides on the daughter strand complementary to the template DNA strand. DNA polymerase has a higher affinity to add the correct base and ensures fidelity during DNA replication. Furthermore,  it exhibits proofreading activity during replication, using an exonuclease domain that cuts off incorrect nucleotides from the nascent DNA strand.
Errors During Replication are Corrected by the DNA Polymerase Enzyme

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関連する実験動画

Updated: Jul 12, 2026

Transcorporal Artificial Urinary Sphincter Cuff Placement in a Case Requiring Revision for Urethral Atrophy
03:25

Transcorporal Artificial Urinary Sphincter Cuff Placement in a Case Requiring Revision for Urethral Atrophy

Published on: June 16, 2022

Erratum Erratum エラトゥーム エラトゥーム

    Science (New York, N.Y.)
    |February 20, 1981
    PubMed
    まとめ

    訂正では,正常な赤血球と状赤血球の微細写真が誤ってクレジットされていることが指摘されています. 写真はパトリシア・A・バークがニュージャージー州医学部のパトリシア・ファーンズワースの研究室で撮影したものです.

    科学分野:

    • 血液学 ヘマトロジ
    • 細胞生物学 細胞生物学
    • メディカルイマージング (医学イメージング)

    背景:

    • 正確な科学的報告は,データと画像の正しい属性に依存しています.
    • 適切な評価は,研究者の貢献が認められることを保証し,科学的なコミュニケーションを容易にする.

    研究 の 目的:

    • 赤血球のフォトミクログラフの帰属を訂正するために.
    • 正常な赤血球と状赤血球を描いた画像の正しいソースを認識するために.

    主な方法:

    • 出版記録と画像ソースのレビュー.
    • 画像の起源と研究所の属性の確認.

    主要な成果:

    • 正常な赤血球と状赤血球のフォトミクログラフは,以前の出版物で誤ってクレジットされていました.
    • 写真はパトリシア・A・バークが撮影したものです.
    • 正確な起源の実験室は,ニュージャージー州医学部生理学科のパトリシア・ファーンズワースの研究室です.

    結論:

    • アトリビューションの訂正は科学的な誠実さにとって不可欠です.

    関連する実験動画

    Last Updated: Jul 12, 2026

    Transcorporal Artificial Urinary Sphincter Cuff Placement in a Case Requiring Revision for Urethral Atrophy
    03:25

    Transcorporal Artificial Urinary Sphincter Cuff Placement in a Case Requiring Revision for Urethral Atrophy

    Published on: June 16, 2022

  • 正確なクレジットを確保することは,科学的出版の基準を尊重します.