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関連する概念動画

Ferromagnetism01:31

Ferromagnetism

3.0K
Materials like iron, nickel, and cobalt consist of magnetic domains, within which the magnetic dipoles are arranged parallel to each other. The magnetic dipoles are rigidly aligned in the same direction within a domain by quantum mechanical coupling among the atoms. This coupling is so strong that even thermal agitation at room temperature cannot break it. The result is that each domain has a net dipole moment. However, some materials have weaker coupling, and are ferromagnetic at lower...
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Molecular Comparison of Gases, Liquids, and Solids02:26

Molecular Comparison of Gases, Liquids, and Solids

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Particles in a solid are tightly packed together (fixed shape) and often arranged in a regular pattern; in a liquid, they are close together with no regular arrangement (no fixed shape); in a gas, they are far apart with no regular arrangement (no fixed shape). Particles in a solid vibrate about fixed positions (cannot flow) and do not generally move in relation to one another; in a liquid, they move past each other (can flow) but remain in essentially constant contact; in a gas, they move...
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Transmission-based Precautions I: Contact, Enteric, and Droplets01:17

Transmission-based Precautions I: Contact, Enteric, and Droplets

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Transmission-based precautions are for patients known to be infected or suspected to be infected or colonized with organisms that pose a significant risk to others. Some transmission-based precautions include contact, enteric, and droplet.
Contact Precautions:
Contact precautions are the measures taken to prevent the transmission of infectious agents, especially epidemiologically important microorganisms such as MRSA or influenza, primarily transmitted through direct or indirect contact with an...
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Rise of Liquid in a Capillary Tube01:18

Rise of Liquid in a Capillary Tube

3.2K
When very thin cylindrical tubes, called capillaries, are dipped in a liquid, the liquid rises or falls in the tube compared to the surrounding liquid. This phenomenon is called capillary action. Capillary action occurs due to the combination of two opposing forces: the cohesive forces of the liquid, which cause it to stick to itself and form a rounded shape, and the adhesive forces between the liquid and the walls of the container, which cause the liquid to be attracted to the container walls.
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Deriving the Speed of Sound in a Liquid01:09

Deriving the Speed of Sound in a Liquid

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As with waves on a string, the speed of sound or a mechanical wave in a fluid depends on the fluid's elastic modulus and inertia. The two relevant physical quantities are the bulk modulus and the density of the material. Indeed, it turns out that the relationship between speed and the bulk modulus and density in fluids is the same as that between the speed and the Young's modulus and density in solids.
The speed of sound in fluids can be derived by considering a mechanical wave...
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High-Performance Liquid Chromatography: Introduction01:11

High-Performance Liquid Chromatography: Introduction

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High-performance liquid chromatography(HPLC), formerly referred to as High-pressure liquid chromatography, is a powerful technique used to separate, identify, and quantify components in complex mixtures. The term "high pressure" refers to using high pressure to push the liquid mobile phase through the tightly packed columns.
In HPLC, two phases play a critical role in the separation process:
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High Throughput Analysis of Liquid Droplet Impacts
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再構成可能な鉄磁気液滴

Xubo Liu1,2, Noah Kent2,3, Alejandro Ceballos4

  • 1Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China.

Science (New York, N.Y.)
|July 20, 2019
PubMed
まとめ
この要約は機械生成です。

研究者は磁性ナノ粒子を混ぜることで 再構成可能な磁性液滴を開発しました これらの滴は磁場を除去した後も磁性を保持し,活性物質とプログラム可能な液体の構造を正確に制御することができます.

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科学分野:

  • 材料科学
  • 柔らかい物質の物理
  • ナノテクノロジー

背景:

  • 固体鉄磁石は固体で 変化しないものです
  • 磁場がないと磁化が失われます.

研究 の 目的:

  • 再構成可能な磁気液滴を作るために
  • 液体構造で安定した鉄磁気特性を得るために.

主な方法:

  • 水と油のインターフェイスで磁性ナノ粒子の単層を組み立てる.
  • パラマグネティックからフェロマグネティックへの変換を誘導する

主要な成果:

  • 強制力と残留磁性を持つ鉄磁気液滴が作られました.
  • 磁場が除去された後も 磁気特性が保たれています
  • ドロップルは様々な形状に再構成できます

結論:

  • 新しい鉄磁気液滴は 再構成性と安定した磁性を提供します
  • ドロップレット運動の精密な遠隔操作が可能である.
  • 潜在的な応用には,活性物質,エネルギー分散装置,プログラム可能な液体構造が含まれます.