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相关概念视频

Mass Spectrometry: Complex Analysis01:21

Mass Spectrometry: Complex Analysis

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Mass spectrometry is an important technique for the identification of pure compounds. However, it has some limitations for the analysis of complex mixtures, often due to excessive fragmentation making the spectrum too complicated to decipher. Mass spectrometry can be combined with suitable separation methods in sequence, forming hyphenated methods, which are useful in the analysis of complex mixtures.
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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.
This technique helps gather information regarding the protein from which the peptide was obtained and to study the peptides’ amino acid sequence. Identifying peptides from a complex mixture is an important component of the growing field of...
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The mass analyzer is a crucial component of the mass spectrometer. In the ionization chamber, the vaporized sample is bombarded with a high-energy electron beam to generate a radical cation and further fragment into neutral molecules, radicals, and cations. A series of negatively charged accelerator plates accelerate the cations into the mass analyzer. The mass analyzer separates ions according to their mass-to-charge (m/z) ratios and then directs them to the detector. The common types of mass...
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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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Mass spectrometry is an analytical technique used to determine the molecular mass and molecular formula of a compound. The basic principle of mass spectrometry is to generate ions from the analyte molecule and measure these ion abundances against their molecular mass.  One common type of ionization, known as electrospray ionization or EI, bombards the analyte molecules in the gas phase with high-energy electron beams. The electron beams displace an electron from the molecule and leave...
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TopNEXt:用于多样本质谱实验的自动DDA排除框架

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此摘要是机器生成的。

TopNEXt通过改进数据采集来增强多样本液体染色学并列质谱. 这一框架提高了碎片化光谱的质量和数量,以更好地识别代谢物.

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科学领域:

  • 代谢学 代谢学 代谢学
  • 分析化学 分析化学
  • 生物信息学是一种生物信息学.

背景情况:

  • 液体色谱 双重质谱 (LC-MS/MS) 对于代谢物注释至关重要.
  • 目前LC-MS/MS中的数据依赖获取 (DDA) 方法往往产生不够的光谱质量和数量.
  • 现有的DDA方法难以进行多样本分析,缺乏信息共享,需要手动干预.

研究的目的:

  • 推出TopNEXt,一个新的实时扫描优先级框架,用于在多样本LC-MS/MS代谢学中增强数据采集.
  • 提高在代谢学实验中收集的碎片化光谱的质量和数量.
  • 为了促进在不同的实验环境中更准确和更全面地识别代谢物.

主要方法:

  • TopNEXt使用兴趣区域和基于强度的评分系统来扩展数据依赖获取排除方法.
  • 该框架在实时运行,在数据采集期间对扫描进行优先排序.
  • TopNEXt 集成到现有的 ViMMS 框架中.

主要成果:

  • TopNEXt成功地增加了对额外10%的目标峰值的碎片化光谱采集.
  • 该框架实现了收购强度额外增加20%.
  • 模拟和实验室实验验证实了TopNEXt在改善光谱数据方面的有效性.

结论:

  • TopNEXt显著提高了多样本LC-MS/MS代谢学中的数据采集.
  • 该框架对光谱质量和数量的改进直接有助于更好地识别代谢物.
  • TopNEXt提供了一个有价值的工具,在代谢学中的各种实验环境中具有广泛的适用性.