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相关概念视频

Mass Analyzers: Overview01:13

Mass Analyzers: Overview

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...
Mass Analyzers: Common Types01:19

Mass Analyzers: Common Types

The quadrupole mass analyzer consists of four cylindrical metal rods arranged in a diamond carrying a DC voltage and a radio-frequency AC voltage. The motion of ions through the quadrupole depends on the field strength, causing only ions of a certain m/z to resonate successfully and strike the detector at a given field strength. Though the transmission rate for these analyzers is high, the exact elemental composition of the sample is not determined because of low resolution; however, they are...
Gas Chromatography: Types of Detectors-II01:19

Gas Chromatography: Types of Detectors-II

In gas chromatography, different detectors are employed to meet specific analytical needs. These detectors are often categorized based on their detection mechanisms and the types of compounds they are best suited to analyze. Thermal Conductivity Detectors (TCD), Flame Ionization Detectors (FID), and Electron Capture Detectors (ECD) represent common categories, each with unique operating principles and applications. However, beyond these, several other detectors are designed for more specialized...
Atomic Absorption Spectroscopy: Instrumentation01:22

Atomic Absorption Spectroscopy: Instrumentation

An atomic absorption spectrophotometer (AAS) comprises several components: a radiation source, an atomizer, a monochromator, and a detector. The radiation source can be a hollow-cathode lamp (HCL) or an electrodeless-discharge lamp (EDL), both of which provide a narrow emission line of the required wavelength. However, some instruments use continuum sources and high-resolution monochromators to achieve a narrow range of radiation.
The atomizer used in AAS can be either a flame atomizer or an...
Atomic Emission Spectroscopy: Instrumentation01:22

Atomic Emission Spectroscopy: Instrumentation

The instrumentation of atomic emission spectrometry (AES) involves various components, including atomization devices that convert samples into gas-phase atoms and ions. There are two main types of atomization devices: continuous and discrete atomizers.  Continuous atomizers, like plasmas and flames, introduce samples in a constant stream, while discrete atomizers inject individual samples using syringes or autosamplers. The most common discrete atomizer is the electrothermal atomizer.
Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation01:26

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation

Inductively coupled plasma (ICP) is the common plasma source used in atomic emission spectroscopy (AES), a technique that detects and analyzes various elements in a sample. This method is often called inductively coupled plasma atomic emission spectroscopy (ICP-AES).
There are three main types of inductively coupled plasma atomic emission spectroscopy  (ICP-AES) instruments: sequential, simultaneous multichannel, and Fourier transform instruments, with the latter being less commonly used.

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相关实验视频

Updated: Jun 17, 2026

Generation of Plasmid Vectors Expressing FLAG-tagged Proteins Under the Regulation of Human Elongation Factor-1&#945; Promoter Using Gibson Assembly
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ACCIO:一个基于装配的工具,可以检测等离子体.

Nathan J Raabe1,2,3, Marissa P Griffith1,2, Vatsala Rangachar Srinivasa1,2,3

  • 1Microbial Genomics Epidemiology Laboratory, Center for Genomic Epidemiology, University of Pittsburgh, 3507 Victoria Street, BST-10 E1000-4A, Pittsburgh, Pennsylvania 15213, USA.

medRxiv : the preprint server for health sciences
|November 24, 2025
PubMed
概括
此摘要是机器生成的。

ACCIO 是一种用于等离子体流行病学的新工具,它克服了测序数据的局限性,以准确识别等离子体及其组. 这有助于追踪由等离子体传播的抗微生物耐药性基因.

关键词:
这是一种等离子体.抗微生物耐药性 抗微生物耐药性基因组流行病学基因组流行病学与医疗保健相关的感染长时间阅读简短阅读 简短阅读

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科学领域:

  • 微生物学 微生物学
  • 基因组学就是基因组学.
  • 生物信息学是一种生物信息学.

背景情况:

  • 塑体是携带抗微生物耐药性基因的移动遗传元素,对于追踪疾病传播至关重要.
  • 目前的等离子体流行病学面临的挑战是由于全基因组序列数据分辨率的局限性.
  • 现有的基因组监测基础设施难以准确识别和跟踪完整的等离子体.

研究的目的:

  • 开发一个生物信息学工具,ACCIO,用于从各种测序数据类型中准确识别和分组等离子体.
  • 克服等离子体流行病学中的技术和基础设施障碍.
  • 改善对等离子体进化和传播的跟踪,特别是那些携带抗菌素耐药性基因的等离子体.

主要方法:

  • ACCIO创建了一个参考等离子体数据库,用于推断组合中的等离子体存在和相关分组.
  • 该工具处理Illumina,纳米孔和混合组件.
  • 验证涉及内部和外部数据集,并与MOB套件进行基准测试.

主要成果:

  • 在不同组件类型中,ACCIO表现出高灵敏度和正预测值 (PPV) (例如,100%的灵敏度,混合组件的92.1%PPV).
  • 该工具在外部数据集上始终表现出高性能.
  • 在各种组装类型和等离子体分组水平上,ACCIO在等离子体重建和打字方面表现优于MOB-suite.

结论:

  • ACCIO有效地解决了等离子体流行病学测序技术的局限性.
  • ACCIO的集成工作流支持所有主要的测序平台,促进更广泛的采用.
  • ACCIO已准备好推进等离子体流行病学和对抗菌素耐药性的监测.