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相关概念视频

Variability: Analysis01:11

Variability: Analysis

125
Measures of variability are statistical metrics that reveal the dispersion pattern within a dataset. They are pivotal in biostatistics, providing insights into the heterogeneity within health and biological data. Variability signifies the degree to which data points diverge from one another, helping researchers understand the potential range of values and associated uncertainty within the data.
The range is a simple measure of variability, indicating the difference between the highest and...
125
Tandem Mass Spectrometry01:21

Tandem Mass Spectrometry

862
Tandem mass spectrometry is a technique that uses multiple mass analyzers in series to obtain a higher selectivity and signal-to-noise ratio for the analyte. 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 collision-induced...
862
Genetic Variation01:25

Genetic Variation

256
Genetic variation is the diversity in DNA sequences found among individuals of the same species. This diversity is crucial for a species' survival because it helps organisms adapt to environmental changes. Genetic variation begins with fertilization, where an egg and sperm cell merge. Each of these cells carries 23 chromosomes, up to 46 in the fertilized egg. Chromosomes are long DNA strands that contain genes, the basic units of heredity.
Genes exist in different versions called alleles,...
256
High-Resolution Mass Spectrometry (HRMS)01:15

High-Resolution Mass Spectrometry (HRMS)

1.2K
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...
1.2K
Volatilization01:10

Volatilization

339
Volatilization gravimetry is an analytical technique that measures the mass lost due to the volatilization of the substance. This technique is used to estimate the amount of volatile material in a sample. To perform this method, heat a known amount of the sample to a high temperature in a crucible or other suitable vessel. The volatile substance in the sample evaporates, and the vapor is completely expelled from the crucible either by heating the sample or bubbling a stream of inert gas through...
339
Extraction: Partition and Distribution Coefficients01:14

Extraction: Partition and Distribution Coefficients

1.7K
The distribution law or Nernst's distribution law is the law that governs the distribution of a solute between two immiscible solvents. This law, also known as the partition law, states that if a solute is added to the mixture of two immiscible solvents at a constant temperature, the solute is distributed between the two solvents in such a way that the ratio of solute concentrations in the solvents remains constant at equilibrium.
For extracting a solute from an aqueous phase into an...
1.7K

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相关实验视频

Updated: May 26, 2025

PTR-ToF-MS Coupled with an Automated Sampling System and Tailored Data Analysis for Food Studies: Bioprocess Monitoring, Screening and Nose-space Analysis
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PTR-ToF-MS Coupled with an Automated Sampling System and Tailored Data Analysis for Food Studies: Bioprocess Monitoring, Screening and Nose-space Analysis

Published on: May 11, 2017

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解开使用JIVE的多平台子挥发学中共享和独特的变异.

Maria Mazzucotelli1, Iuliia Khomenko2, Emanuela Betta2

  • 1Research and Innovation Centre, Fondazione Edmund Mach, San Michele all'Adige, Trento, Italy; C3A - Center Agriculture Food Environment, University of Trento, San Michele all'Adige, Trento, Italy.

Talanta
|February 21, 2025
PubMed
概括

整合来自多种分析技术 (如GC-MS,PTR-ToF-MS和GC-IMS) 的数据是一项挑战. 联合和个体变异解释 (JIVE) 方法有效地将共享和独特的信息与挥发性数据分开,有助于食品质量分析.

关键词:
在GC-IMSS中.在GC-MS中使用GC-MS.在PTR-ToF-MS中使用.烤 在烤.挥发性有机化合物 挥发性有机化合物挥发性 挥发性 挥发性

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Pure Shift Nuclear Magnetic Resonance: a New Tool for Plant Metabolomics
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相关实验视频

Last Updated: May 26, 2025

PTR-ToF-MS Coupled with an Automated Sampling System and Tailored Data Analysis for Food Studies: Bioprocess Monitoring, Screening and Nose-space Analysis
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科学领域:

  • 食品科学与技术 食品科学与技术
  • 分析化学 分析化学
  • 化学测量 化学测量 化学测量

背景情况:

  • 挥发性代谢物是食物感官质量,可接受性和可追溯性的关键指标.
  • 综合性挥发性体征通常需要整合多种分析技术.
  • 整合来自独立分析平台的数据以识别共享和独特的信息是一个重大挑战.

研究的目的:

  • 展示多变量联合和个体变化解释 (JIVE) 方法的应用,以集成多平台的挥发性数据.
  • 用气色谱-质谱法 (GC-MS),飞行质谱法 (PTR-ToF-MS) 的质子转移反应时间和气色谱-离子移动谱法 (GC-IMS) 来分析粉的挥发量.
  • 评估不同分析技术的互补性,并指导选择最佳方法.

主要方法:

  • 使用GC-MS,PTR-ToF-MS和GC-IMS进行花糊挥发体的表征.
  • 从GC-IMS数据中开发一个自动化管道,用于从GC-IMS数据中提取非目标的峰值表.
  • 应用联合和个体变化解释 (JIVE) 多变量方法用于数据集成和分析.

主要成果:

  • JIVE成功地将每个数据集中的可变性分解为联合和单独的组件.
  • 高级比较证实了基于变异分解和变量分布的GC-MS,PTR-ToF-MS和GC-IMS的互补性.
  • 来自JIVE的潜在变量促进了共享和平台特定分析模式的可视化和关键变量趋势的识别.

结论:

  • JIVE方法为无监督探索和解释多平台挥发性数据提供了一个强大的策略.
  • JIVE提供了对共享和技术特定信息的更清晰的见解,支持客观评估多平台分析.
  • 该方法有助于理解组合分析技术的潜力,并指导选择适合特定研究问题的方法.