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相关概念视频

Applications of IR Spectroscopy: Overview01:11

Applications of IR Spectroscopy: Overview

2.0K
The non-destructive nature and ability to provide valuable chemical information make IR spectroscopy a versatile technique with broad applications in various scientific and industrial fields. IR spectroscopy is commonly used to identify and characterize organic and inorganic compounds. It provides information about the functional groups present in a molecule and the bonding between atoms. This helps in the structural elucidation of compounds during organic synthesis, pharmaceutical research,...
2.0K
Infrared (IR) Spectroscopy: Overview01:09

Infrared (IR) Spectroscopy: Overview

4.6K
When electromagnetic radiation passes through a material, atoms or molecules transition from a lower to a higher energy state by absorbing radiation corresponding to the energy difference between the two states. The absorption of infrared (IR) radiation causes transitions between vibrational energy levels in a molecule. Therefore, IR spectroscopy is a useful analytical tool for determining the molecular structure of molecules.
Different compounds display unique properties due to their...
4.6K
IR Spectrometers01:25

IR Spectrometers

2.3K
There are two main infrared (IR) spectrophotometers: dispersive IR spectrometers and Fourier transform infrared (FTIR) spectrometers. In a dispersive IR spectrometer, a beam of infrared radiation produced by a hot wire is divided into two parallel equal-intensity beams using mirrors. One beam passes through the sample, while another is a reference beam. The beams then move through the monochromator, which separates the radiations into a continuous spectrum of different frequencies. The...
2.3K
IR Frequency Region: Fingerprint Region01:03

IR Frequency Region: Fingerprint Region

1.8K
IR spectra are divided into two main regions: the diagnostic region and the fingerprint region. The diagnostic region of the spectrum lies above 1500 cm−1. The absorptions resulting from single-bond vibrations of the N–H, C–H, and O–H stretch at higher wavenumbers and appear on the left side of the spectrum. The stretching absorptions of the C≡C and C≡N occur between 2100–2300 cm−1. In contrast, those arising from stretching absorptions of the...
1.8K
IR and UV–Vis Spectroscopy of Aldehydes and Ketones01:29

IR and UV–Vis Spectroscopy of Aldehydes and Ketones

7.3K
Infrared spectroscopy, also known as vibrational spectroscopy, is mainly used to determine the types of bonds and functional groups in molecules. In aldehydes and ketones, the carbonyl (C=O) bond shows an absorption around 1710 cm-1. The C=O bond vibration of an aldehyde occurs at lower frequencies than that of a ketone. In addition to the C=O absorption in an aldehyde, the aldehydic C–H bond also gives two peaks in the 2700–2800 cm-1 range. This absorption, coupled with the...
7.3K
IR Spectrum01:19

IR Spectrum

2.0K
When infrared (IR) radiation passes through a molecule, the bonds stretch or bend by absorbing the radiation. This absorption creates the molecule's absorption spectrum, which is the plot of its percentage transmittance versus wavenumber.
Transmittance is defined as the ratio of the radiant power passing through a sample to that from the radiation's source. Multiplying the transmittance by 100 gives the percent transmittance (%T), which varies between 100% (no absorption) and 0%...
2.0K

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High-definition Fourier Transform Infrared FT-IR Spectroscopic Imaging of Human Tissue Sections towards Improving Pathology
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一个用于红外光谱分析的软件框架,用于降低危害,检查药物.

Lea Gozdzialski1, Oscar Sandford1, Zoe Riell1

  • 1Department of Chemistry, University of Victoria, Victoria, British Columbia, Canada.

The American journal of drug and alcohol abuse
|October 29, 2025
PubMed
概括

一个用于药物检查的新软件框架显著扩大了对这种减少危害干预的访问. 该技术降低了技术障碍,使更多使用毒品的人能够获得关键的安全信息.

关键词:
药物检查 药物检查 药物检查减少伤害 减少伤害红外吸收光谱学 红外吸收光谱学预防过量服用 预防过量服用医疗点的分析分析

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Diffuse Reflectance Infrared Spectroscopic Identification of Dispersant/Particle Bonding Mechanisms in Functional Inks
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科学领域:

  • 分析化学 分析化学
  • 公共卫生技术 公共卫生技术
  • 减少伤害的干预措施 减少伤害的干预

背景情况:

  • 药物检查是利用化学分析识别非法药物成分的重要危害降低策略.
  • 扩大药物检查服务对于危险人群中过量预防至关重要.
  • 现有药物检查软件的技术挑战限制了服务的可访问性.

研究的目的:

  • 开发和部署一个用户友好的,定制的基于FTIR的软件框架,用于药物检查.
  • 创建一个可扩展的技术基础设施,支持扩展药物检查服务.
  • 改善客户和公共卫生利益相关者对数据的可访问性.

主要方法:

  • 开发一个与光谱仪集成的信息亭应用程序,用于数据收集.
  • 实施一个集中式数据库,用于光谱和调查数据的存储.
  • 创建一个分析套件,包含用于光谱解释的库和工具.
  • 个人结果的在线可访问性和用于汇总数据分析的内部仪表板.
  • 为社区传播提供量身定制的面向公众的报告.

主要成果:

  • 到2024年,在6个远程服务站点成功部署软件框架.
  • 在2022年5月至2024年12月期间,对1926名客户进行了2673个药物样本的分析.
  • 数百名客户首次访问药物检查服务.
  • 建立了每周和每月生成综合药物数据报告的系统.

结论:

  • 开发的软件框架成功地减少了对药物检查的技术障碍.
  • 改善服务获取,并为社区和公共卫生官员提供实时可操作的数据.
  • 这种技术进步对于维持和扩大必要的药物检查举措至关重要.