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Kinetic Molecular Theory: Molecular Velocities, Temperature, and Kinetic Energy03:07

Kinetic Molecular Theory: Molecular Velocities, Temperature, and Kinetic Energy

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The kinetic molecular theory qualitatively explains the behaviors described by the various gas laws. The postulates of this theory may be applied in a more quantitative fashion to derive these individual laws.
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Kinetic Molecular Theory and Gas Laws Explain Properties of Gas Molecules02:34

Kinetic Molecular Theory and Gas Laws Explain Properties of Gas Molecules

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The test of the kinetic molecular theory (KMT) and its postulates is its ability to explain and describe the behavior of a gas. The various gas laws (Boyle’s, Charles’s, Gay-Lussac’s, Avogadro’s, and Dalton’s laws) can be derived from the assumptions of the KMT, which have led chemists to believe that the assumptions of the theory accurately represent the properties of gas molecules.
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Molecular Kinetic Energy01:21

Molecular Kinetic Energy

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The word "gas" comes from the Flemish word meaning "chaos," first used to describe vapors by the chemist J. B. van Helmont. Consider a container filled with gas, with a continuous and random motion of molecules. During collisions, the velocity component parallel to the wall is unchanged, and the component perpendicular to the wall reverses direction but does not change in magnitude. If the molecule’s velocity changes in the x-direction, then its momentum is changed.
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Basic Postulates of Kinetic Molecular Theory: Particle Size, Energy, and Collision02:43

Basic Postulates of Kinetic Molecular Theory: Particle Size, Energy, and Collision

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The ideal-gas equation, which is empirical, describes the behavior of gases by establishing relationships between their macroscopic properties. For example, Charles’ law states that volume and temperature are directly related. Gases, therefore, expand when heated at constant pressure. Although gas laws explain how the macroscopic properties change relative to one another, it does not explain the rationale behind it.
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Behavior of Gas Molecules: Molecular Diffusion, Mean Free Path, and Effusion03:48

Behavior of Gas Molecules: Molecular Diffusion, Mean Free Path, and Effusion

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Although gaseous molecules travel at tremendous speeds (hundreds of meters per second), they collide with other gaseous molecules and travel in many different directions before reaching the desired target. At room temperature, a gaseous molecule will experience billions of collisions per second. The mean free path is the average distance a molecule travels between collisions. The mean free path increases with decreasing pressure; in general, the mean free path for a gaseous molecule will be...
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Molecules and Compounds02:38

Molecules and Compounds

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Atoms and Molecules
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Updated: Jan 31, 2026

Parallel High Throughput Single Molecule Kinetic Assay for Site-Specific DNA Cleavage
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Parallel High Throughput Single Molecule Kinetic Assay for Site-Specific DNA Cleavage

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配列から機能へ:単分子運動と分子多様性の橋渡し

A N Kapanidis1,2, L Muras3, K Sreenivasa4

  • 1Department of Physics, University of Oxford, Oxford, UK.

Science (New York, N.Y.)
|January 29, 2026
PubMed
まとめ
この要約は機械生成です。

新しい単一分子技術により,核酸とタンパク質の配列を大規模に分析することができます. これらの方法は,分子配列,構造,動力学,および機能をリンクし,薬剤発見とゲノミクスを前進させます.

さらに関連する動画

An In Vitro Single-Molecule Imaging Assay for the Analysis of Cap-Dependent Translation Kinetics
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An In Vitro Single-Molecule Imaging Assay for the Analysis of Cap-Dependent Translation Kinetics

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Measuring the Kinetics of mRNA Transcription in Single Living Cells
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Measuring the Kinetics of mRNA Transcription in Single Living Cells

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関連する実験動画

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Parallel High Throughput Single Molecule Kinetic Assay for Site-Specific DNA Cleavage
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Parallel High Throughput Single Molecule Kinetic Assay for Site-Specific DNA Cleavage

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An In Vitro Single-Molecule Imaging Assay for the Analysis of Cap-Dependent Translation Kinetics
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An In Vitro Single-Molecule Imaging Assay for the Analysis of Cap-Dependent Translation Kinetics

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Measuring the Kinetics of mRNA Transcription in Single Living Cells
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Measuring the Kinetics of mRNA Transcription in Single Living Cells

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科学分野:

  • 分子生物学は分子生物学である.
  • バイオフィジックス 生物物理学
  • ゲノミクスゲノミクスとは

背景:

  • 生物学的な機能は,核酸とタンパク質の配列によって決定されます.
  • 核酸は,構造,動態,相互作用に影響を与える物理化学的性質を有しています.
  • シーケンス-プロパティ関係を理解するには,分子多様性とダイナミクスを捉える方法が必要です.

研究 の 目的:

  • 分子ダイナミクスをスケールで分析するための高度な単分子技術を探求する.
  • 分子配列,構造,ダイナミクス,生物学的機能の間のギャップを埋めるために.

主な方法:

  • 高度に複合された単一分子アプローチを使用します.
  • 何百万もの個々の分子と数千の配列の分子動態を観察する.
  • 配列依存のエネルギー景観を分析するためのスケーラブルな方法の開発.

主要な成果:

  • 膨大な数の分子と配列の分子動態を観察する能力を実証した.
  • スケールでのシーケンス,構造,ダイナミクス,および機能分析の統合を開始しました.
  • 様々な生物学的応用におけるこれらの高度な技術の潜在能力を示しました.

結論:

  • 高複合単一分子方法は,配列-機能関係の研究に革命を起こしています.
  • これらの技術は,薬物の発見,分子診断,機能的ゲノミクスのための前例のない機会を提供します.
  • 進行中の開発は,スケールでの分子行動を理解する上でさらなる進歩を約束しています.