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相关概念视频

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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相关实验视频

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:高压显微镜学

Zhongwu Wang, Yusheng Zhao

    Science (New York, N.Y.)
    |May 30, 2006
    PubMed
    概括
    此摘要是机器生成的。

    电子轰炸导致碳纳米管收缩,产生显著的内部压力. 这种现象允许在狭窄的空间内对分子行为进行原子分辨率研究.

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

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

    High Pressure Single Crystal Diffraction at PX^2

    Published on: January 16, 2017

    相关实验视频

    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

    科学领域:

    • 材料科学 材料科学 材料科学
    • 纳米技术 纳米技术
    • 物理 物理学 物理

    背景情况:

    • 碳纳米管 (CNTs) 是具有独特机械和电气性能的圆柱形分子.
    • 了解物质在极端条件下的行为对于开发新材料和新技术至关重要.

    研究的目的:

    • 为了研究电子轰炸对碳纳米管的影响.
    • 探索由此产生的内部压力及其对封装分子的影响.

    主要方法:

    • 用电子轰炸CNT.
    • 原子分辨率成像技术用于观察结构变化.
    • 在纳米管内测量压力.

    主要成果:

    • 在电子轰炸时观察到碳纳米管的收缩.
    • 在纳米管内产生高内部压力.
    • 证明了在原子分辨率下研究分子效应的能力.

    结论:

    • 电子诱导的CNT收缩是创建高压环境的可行方法.
    • 这种技术使得分子对压力反应的详细原子级分析成为可能.