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High-Resolution Mass Spectrometry (HRMS)01:15

High-Resolution Mass Spectrometry (HRMS)

The resolution of a mass spectrometer depends on the efficiency of separating ions with different ion masses. The mass of an atom is approximated to the sum of the masses of protons and neutrons inside, considering the masses of protons and neutrons as equal. However, the masses of the proton (1.6726 × 10−24 g) and neutron (1.6749 × 10−24 g) are not truly equal. There is a minor error in the expression of atomic masses relative to the simplest atom of hydrogen. For example, the mass of helium...
Preparation of Samples for Electron Microscopy01:20

Preparation of Samples for Electron Microscopy

To be visualized by an electron microscope, either transmission or scanning, biological samples need to be fixed (stabilized) so the electron beam does not destroy them and dried thoroughly (desiccated/dehydrated) so the vacuum does not affect them. Fixation needs to be done as quickly as possible because the sample properties will start changing as soon as it is removed from its natural environment. For example, in a tissue sample, the oxygen levels begin decreasing, causing an altered...

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関連する実験動画

Updated: Jun 29, 2026

Synthesis and Microdiffraction at Extreme Pressures and Temperatures
07:26

Synthesis and Microdiffraction at Extreme Pressures and Temperatures

Published on: October 8, 2013

材料科学:高圧顕微鏡技術

Zhongwu Wang, Yusheng Zhao

    Science (New York, N.Y.)
    |May 30, 2006
    PubMed
    まとめ
    この要約は機械生成です。

    電子の爆撃により,炭素ナノチューブが縮小し,大きな内部圧力を発生させます. この現象は,狭い空間内の分子行動の原子解像度の研究を可能にします.

    さらに関連する動画

    High-Sensitivity Nuclear Magnetic Resonance at Giga-Pascal Pressures: A New Tool for Probing Electronic and Chemical Properties of Condensed Matter under Extreme Conditions
    08:42

    High-Sensitivity Nuclear Magnetic Resonance at Giga-Pascal Pressures: A New Tool for Probing Electronic and Chemical Properties of Condensed Matter under Extreme Conditions

    Published on: October 10, 2014

    High Pressure Single Crystal Diffraction at PX^2
    11:32

    High Pressure Single Crystal Diffraction at PX^2

    Published on: January 16, 2017

    関連する実験動画

    Last Updated: Jun 29, 2026

    Synthesis and Microdiffraction at Extreme Pressures and Temperatures
    07:26

    Synthesis and Microdiffraction at Extreme Pressures and Temperatures

    Published on: October 8, 2013

    High-Sensitivity Nuclear Magnetic Resonance at Giga-Pascal Pressures: A New Tool for Probing Electronic and Chemical Properties of Condensed Matter under Extreme Conditions
    08:42

    High-Sensitivity Nuclear Magnetic Resonance at Giga-Pascal Pressures: A New Tool for Probing Electronic and Chemical Properties of Condensed Matter under Extreme Conditions

    Published on: October 10, 2014

    High Pressure Single Crystal Diffraction at PX^2
    11:32

    High Pressure Single Crystal Diffraction at PX^2

    Published on: January 16, 2017

    科学分野:

    • マテリアルサイエンス 材料科学
    • ナノテクノロジー ナノテクノロジー
    • 物理 物理学 物理学とは

    背景:

    • 炭素ナノチューブ (CNT) は,ユニークな機械的および電気的性質を持つ円筒形の分子です.
    • 極端な条件下で物質の振る舞いを理解することは,新しい材料や技術の開発に不可欠です.

    研究 の 目的:

    • 炭素ナノチューブに対する電子爆撃の影響を調査する.
    • その結果生じる内部圧力と,その影響がカプセル化された分子に及ぼす影響を調査する.

    主な方法:

    • CNTを電子で爆撃する.
    • 構造変化を観察するための原子解像度の画像技術.
    • ナノチューブ内の圧力測定.

    主要な成果:

    • 電子爆撃で炭素ナノチューブの収縮が観察されました.
    • ナノチューブ内の高内部圧力の生成.
    • 原子解像度で分子効果を研究する能力を実証した.

    結論:

    • CNTの電子誘発収縮は,高圧環境を創造するための有効な方法です.
    • この技術は,圧力に対する分子反応の詳細な原子レベルの分析を可能にします.