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Methods of Sterilization II: Chemical Methods01:30

Methods of Sterilization II: Chemical Methods

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In healthcare, the chemical method of sterilization uses chemical sterilants to treat surgical instruments and medical supplies to help prevent the transmission of infectious pathogens to patients. Due to heat sensitivity, most medical supplies and equipment should not be exposed to high temperatures. These parts include rubber, plastic, glass, and other similar elements.
Using chemical sterilization rather than heat to clean out equipment is recommended. It eradicates and removes all bacteria,...
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Physical Methods for Controlling Microbial Growth: Temperature01:23

Physical Methods for Controlling Microbial Growth: Temperature

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Heat is a widely used method to control microbial growth by targeting and denaturing cellular proteins, thereby killing or inactivating microbes. This method's effectiveness is quantified using parameters such as the thermal death point (TDP), thermal death time (TDT), and decimal reduction time (D value). TDP represents the lowest temperature at which all microorganisms in a liquid suspension are eliminated within 10 minutes, whereas TDT is the time necessary to achieve sterilization at a...
1.7K

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Correction to "High-Resolution Photoelectron Spectroscopy of the X<sup>+</sup> <sup>2</sup>Σ<sup>+</sup> Ground State of CaAr<sup>+</sup>".

The journal of physical chemistry. A·2026
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Competition between electron transfer and reactive capture in ion-molecule reactions at low collision energies: isotopic and stereodynamic effects in the reactions of CH<sub>3</sub>F with H<sub>2</sub><sup>+</sup>, HD<sup>+</sup> and D<sub>2</sub><sup></sup>.

Physical chemistry chemical physics : PCCP·2025
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High-Resolution Photoelectron Spectroscopy of the X<sup>+ 2</sup>Σ<sup>+</sup> Ground State of CaAr<sup></sup>.

The journal of physical chemistry. A·2025
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Ionization Energy of Metastable ^{3}He (2 ^{3}S_{1}) and the Alpha- and Helion-Particle Charge-Radius Difference from Precision Spectroscopy of the np Rydberg Series.

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Cold reactions of He<sup>+</sup> with OCS and CO<sub>2</sub>: competitive kinetics and the effects of the molecular multipole moments.

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相关实验视频

Updated: May 5, 2026

Non-equilibrium Microwave Plasma for Efficient High Temperature Chemistry
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Non-equilibrium Microwave Plasma for Efficient High Temperature Chemistry

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微波控制冷化学 微波控制冷化学

Fernanda B V Martins1, Hansjürg Schmutz1, Josef A Agner1

  • 1ETH Zürich, Institute of Molecular Physical Science, Zürich, Switzerland.

Physical review letters
|April 11, 2025
PubMed
概括

微波可以通过改变分子旋转来控制冷离子-分子反应. 这项研究使用共振微波脉冲证明了高达40%的反应抑制,揭示了非热控制机制.

科学领域:

  • 化学动力学 化学动力学
  • 物理化学 物理化学
  • 量子控制是一种量子控制.

背景情况:

  • 离子-分子反应是化学和天体物理学的基础.
  • 在低温下控制这些反应对于理解反应动态至关重要.
  • 分子的旋转状态显著影响反应路径和速率.

研究的目的:

  • 引入一种新的方法来控制冷离子分子化学使用微波.
  • 研究分子旋转状态种群对反应速率的影响.
  • 为了证明微波辅助化学控制的非热机制.

主要方法:

  • 利用合并束方法研究He+和旋转冷的CO分子之间的反应.
  • 达成的碰撞能量大约在0到10K之间.
  • 使用共振微波脉冲操纵了CO分子的旋转状态群体.

主要成果:

  • 在离子-分子反应速率中达到高达40%的抑制.
  • 证明微波脉冲与CO中的纯旋转转变共振显著影响反应结果.
  • 为推动微波辅助化学的非热机制提供了明确的证据.

结论:

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  • 旋转状态群体的微波控制为引导离子-分子反应提供了一个强大的工具.
  • 这种技术可以在低温下精确操纵化学反应性.
  • 这些发现为使用量子效应控制化学过程开辟了新的途径.