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相关概念视频

Matrix-Assisted Laser Desorption Ionization (MALDI)01:08

Matrix-Assisted Laser Desorption Ionization (MALDI)

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Matrix-assisted laser desorption ionization (MALDI) is a powerful analytical technique used in mass spectrometry. It enables the identification and characterization of various biomolecules, including proteins, peptides, nucleic acids, and carbohydrates. MALDI is an ionization technique, widely employed in biological and medical research, as well as in fields like pharmacology and biochemistry.The analyte of interest, a biomolecule or a mixture of biomolecules, is mixed with a suitable matrix...
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MALDI-TOF Mass Spectrometry01:19

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Mass spectrometry is a powerful characterization technique that can identify and separate a wide variety of compounds ranging from chemical to biological entities, based on their mass-to-charge ratio (m/z). The instruments that allow this detection, known as mass spectrometers, have three components: an ion source, a mass analyzer, and a detector. These spectrometers differ based on the nature of their ion source and analyzers.Matrix-assisted laser desorption ionization (MALDI) is a commonly...
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Inductively Coupled Plasma–Mass Spectrometry (ICP–MS): Overview01:19

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In inductively coupled plasma–mass spectrometry (ICP–MS), an inductively coupled plasma (ICP) torch is used as an atomizer and ionizer. Solid samples are dissolved and volatilized before being introduced into the high-temperature argon plasma, while solution samples are nebulized and passed through the high-temperature argon plasma. Plasma dissociates the analytes and ionizes their component atoms to form a mixture of positive ions and molecular species. The positive ions are then...
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Tandem Mass Spectrometry01:21

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Tandem mass spectrometry is a technique that uses multiple mass analyzers in series to obtain a higher selectivity and reduce chemical noise during analyte detection. Instruments with multiple analyzers separated by an interaction cell enable secondary fragmentation and selected study of the fragment ions.Secondary fragmentations occur in the interaction cell and can be induced by various factors. Fragmentation induced by collision with inert gases, such as N2, Ar, He, etc., is called...
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Mass Spectrometers01:16

Mass Spectrometers

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This lesson details the instrumentation of a mass spectrometer—a physical instrument to perform mass spectrometry on analyte molecules and record the characteristic mass spectra. This is achieved via three chief functions:
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Peptide Identification Using Tandem Mass Spectrometry01:33

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Tandem mass spectrometry, also known as MS/MS or MS2, is an analytical technique that employs two mass analyzers. Essentially it is a series of mass spectrometers that helps isolate a particular biomolecule and then helps study its chemical properties.
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Whole-body Mass Spectrometry Imaging by Infrared Matrix-assisted Laser Desorption Electrospray Ionization IR-MALDESI
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将离子束控制集成到商业平台中,用于改进多模式SIMS/MALDI成像.

Kasper Krijnen1, Sebastian Böhm2, Jens Höhndorf2

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概括

这项研究通过整合C60离子枪来提高空间分辨率和灵敏度来增强多式质谱成像 (MSI). 新的平台可实现无数据采集和共同注册,用于生物研究中先进的化学分析.

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科学领域:

  • 分析化学 分析化学
  • 生物医学成像技术 生物医学成像技术
  • 材料科学 材料科学 材料科学

背景情况:

  • 质谱成像 (MSI) 对于生物和生物医学领域的空间分辨化学分析至关重要.
  • 多模式MSI结合了二次离子质谱 (SIMS) 和矩阵辅助激光脱吸/离子 (MALDI) 等技术进行综合分析.
  • 从单独的仪器中获取多式联网MSI数据在图像同登记和样本完整性方面存在挑战.

研究的目的:

  • 通过实施视野 (FoV) 模式SIMS来增强单一平台的MSI仪器.
  • 提高多式联运MSI中的空间分辨率和灵敏度.
  • 为了促进高空间分辨率图像与其他成像模式的同步注册.

主要方法:

  • 将C60离子枪集成到商用MSI仪器中,用于SIMS,MALDI和二次电子成像.
  • 实现了FoV模式SIMS与离子束拉斯特化,以提高空间分辨率.
  • 使用碰撞诱导解离 (CID) 优化了元素离子信号,并利用二次电子进行MALDI激光评估.

主要成果:

  • 在FoV模式SIMS中实现了2μm的空间分辨率,超过了样本阶段的分辨率.
  • 通过CID.证明了对特定物种的增强敏感性.
  • 成功地刻了用于光学图像协同注册的信任标记,并使用二次电子评估了MALDI激光器设置.

结论:

  • 开发的单平台MSI仪器为多式联络分析提供了更好的空间分辨率和灵敏度.
  • 整合方便了无的数据采集和联合注册,克服了单独的仪器方法的局限性.
  • 这一进步为生命科学及其他领域的化学成像提供了更强大,更有效的工具.