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相关概念视频

Solvents01:12

Solvents

69.5K
A solvent is a substance, most often a liquid, that can dissolve other substances. Here, the substance being dissolved is called a solute. When a solvent and a solute combine, they form a solution - a homogenous mixture of both the solvent and the solute. Water is a universal biological solvent. Its polar structure allows it to dissolve many other polar compounds. The ability of water to dissolve is governed by a balance between water molecules binding to each other and binding to the solute.
A...
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Chemical Shift: Internal References and Solvent Effects01:17

Chemical Shift: Internal References and Solvent Effects

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In an NMR sample, precise measurement of the absolute absorption frequencies of nuclei is difficult. A standard internal reference compound is added, and the frequency difference between the reference signal and sample signals is measured.
The internal reference compound generally used in NMR spectroscopy is tetramethylsilane (TMS). TMS is preferred because it is chemically inert, soluble in NMR solvents, and easily removable. Also, the highly shielded methyl protons in TMS yield an intense...
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Titration in Nonaqueous Solvents01:16

Titration in Nonaqueous Solvents

1.3K
Most acid-base titrations are performed in an aqueous medium. In aqueous titrations, water competes with weaker acids or bases for proton donation or acceptance, leading to ambiguous endpoints in the titration curve. Water also affects the partial ionization of weak acids or bases. For example, water accepts a proton from acetic acid to form hydronium and acetate ions. The hydronium ion formed is a stronger acid than acetic acid, and the acetate ion is a stronger base than water. As a result,...
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相关实验视频

Updated: Jan 14, 2026

Analyzing Mixing Inhomogeneity in a Microfluidic Device by Microscale Schlieren Technique
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Analyzing Mixing Inhomogeneity in a Microfluidic Device by Microscale Schlieren Technique

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计算机视觉有助于实验性监测深层欧性溶剂中的混合效应.

Calum Fyfe1, Rhoda Duncan1, Timothy J D McCabe1

  • 1Department of Pure and Applied Chemistry, University of Strathclyde, Glasgow G1 1XL, U.K.

ACS sustainable chemistry & engineering
|October 24, 2025
PubMed
概括
此摘要是机器生成的。

计算机视觉量化混合在深度浸泡溶剂 (DESs),克服粘度的挑战. 使用这种技术优化温度和容器设计可以提高化学合成中可持续的溶剂应用.

关键词:
摄像机摄像机的摄像机是什么计算流体动力学的流体动力学.绿色化学是一种绿色化学.影像成像技术 影像成像技术质量转移是指质量转移.混合 混合 混合 混合反应优化反应的优化.可持续的合成可持续的合成粘度 粘度 粘度 粘度 粘度

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Microfluidic Mixers for Studying Protein Folding
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相关实验视频

Last Updated: Jan 14, 2026

Analyzing Mixing Inhomogeneity in a Microfluidic Device by Microscale Schlieren Technique
10:12

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科学领域:

  • 绿色化学和可持续的溶剂
  • 材料科学与工程 材料科学与工程
  • 化学过程监测和优化 化学过程监测和优化

背景情况:

  • 深度浸泡溶剂 (DES) 是石油溶剂的可持续替代品,但通常具有高粘度,阻碍了高效的混合.
  • 有效的混合对于优化DES介导合成中的反应动力学和产量至关重要.
  • 评估混合的传统方法可能具有侵入性或缺乏定量精度.

研究的目的:

  • 应用计算机视觉用于各种DES配方混合过程的定量,非侵入性监测和优化.
  • 为了研究温度和容器几何学对DES混合动力学的影响.
  • 展示基于计算机视觉的混合分析对可持续合成方法的实际实用性.

主要方法:

  • 使用Kineticolor视频分析软件来跟踪三个模型DES系统 (ChCl/EG,ChCl/G,ChCl/U) 中的混合动力.
  • 实验性变化的参数包括温度 (25-60°C) 和船体几何.
  • 使用计算流体动力学 (CFD) 模拟来验证实验结果并分析流场.

主要成果:

  • 混合时间因DES粘度和条件而异,从几秒钟到60分钟以上,变化很大.
  • 将温度从25°C提高到60°C,使混合时间减少了多达10倍.
  • CFD模拟证实了具有高度粘性DES的狭窄几何体中的受限流场,与实验观测相关.

结论:

  • 计算机视觉提供了一个强大的,非侵入性的方法来量化和优化在具有挑战性的DES系统中混合.
  • 通过视频分析了解混合现象对于在化学合成中推进可持续的DES应用至关重要.
  • 这种方法弥合了DES的潜力与其在工业过程中的实际实施之间的差距.