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Related Concept Videos

Inductively Coupled Plasma Atomic Emission Spectroscopy: Principle01:19

Inductively Coupled Plasma Atomic Emission Spectroscopy: Principle

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Inductively coupled plasma (ICP) is the most widely used plasma source in atomic emission spectroscopy (AES), also known as Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES). The ICP source, or torch, consists of three concentric quartz tubes with argon gas flowing through them. A spark from a Tesla coil initiates the ionization of argon, generating a high-temperature plasma.
The ions and electrons produced interact with the fluctuating magnetic field created by a water-cooled...
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Transmission-based Precautions II: Airborne and Protective Environment01:25

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Transmission-based precautions are for patients infected or suspected to be infected (or colonized) with organisms posing a significant risk to others. The transmission precautions include airborne and protective environment precautions.
Airborne precautions:
Use airborne precautions when treating patients known or suspected to have diseases that spread through the air—for example, tuberculosis or measles. These organisms are present in smaller droplets expelled by an infected person and...
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Atomic Absorption Spectroscopy: Atomization Methods01:25

Atomic Absorption Spectroscopy: Atomization Methods

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Atomic Absorption Spectroscopy (AAS) atomizes samples through flame atomization or electrothermal atomization. Flame atomization typically involves a nebulizer and spray chamber assembly to combine the sample with a fuel–oxidant mixture, creating a fine aerosol mist that enters a burner. Typically, the fuel and oxidant are combined in an approximately stoichiometric ratio. However, for atoms that are easily oxidized, a fuel-rich mixture may be more advantageous. Only about 5% of the...
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Methods of Sterilization I: Physical Methods01:29

Methods of Sterilization I: Physical Methods

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As used in a healthcare facility, sterilization destroys all microorganisms through physical or chemical methods. The physical method includes steam, dry heat, boiling water, and radiation.
Steam sterilization uses non-toxic, low-cost moist heat in the form of saturated steam under pressure, which is fast, microbicidal, and sporicidal, and quickly warms and penetrates fabrics. Autoclaves, or steam sterilizers, expose each item to direct steam contact for a predetermined time at the necessary...
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Atomic Emission Spectroscopy: Overview01:20

Atomic Emission Spectroscopy: Overview

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Atomic emission spectroscopy (AES) is an analytical technique used to determine the elemental composition of a sample by analyzing the light emitted from excited atoms. In AES, atoms in a sample are excited to higher energy levels by thermal energy from high-temperature sources, such as plasma, arcs, or sparks. When these excited atoms return to lower energy states, they emit light at specific wavelengths characteristic of each element. The resulting atomic emission spectrum, which consists of...
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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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Updated: Jun 11, 2025

Detection of Viruses from Bioaerosols Using Anion Exchange Resin
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Bioaerosol Inactivation by a Cold Plasma Ionizer Coupled with an Electrostatic Precipitator.

Samuel Wei Yang Lim1, Sian Yang Ow1, Laura Sutarlie1

  • 1Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, Innovis, #08-03, Singapore 138634, Singapore.

Microorganisms
|September 28, 2024
PubMed
Summary

Cold plasma technology, coupled with electrostatic precipitators, effectively inactivates airborne viruses and bacteria. This bioaerosol inactivation offers a promising approach to prevent the spread of infectious diseases.

Keywords:
Escherichia colibioaerosolscold plasma ionizerelectrostatic precipitatorinactivationnon-thermal plasmaporcine respiratory coronavirus

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Last Updated: Jun 11, 2025

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Area of Science:

  • Environmental Science
  • Microbiology
  • Engineering

Background:

  • Airborne infectious diseases spread via bioaerosols, necessitating new control strategies beyond air purification.
  • Cold plasma technology presents a potential solution for bioaerosol inactivation.

Purpose of the Study:

  • To evaluate the efficacy of cold plasma ionizer (CPI) and CPI-ESP devices in inactivating airborne microorganisms.
  • To investigate the mechanism of bacterial cell membrane damage by cold plasma.

Main Methods:

  • Testing CPI and CPI-ESP devices against surface-spread porcine respiratory coronavirus and Escherichia coli.
  • Assessing CPI-ESP efficacy on aerosolized E. coli and naturally occurring airborne microbes in various indoor settings.
  • Utilizing fluorescence microscopy to examine bacterial cell membrane damage.

Main Results:

  • CPI-ESP effectively inactivated surface-spread viruses and bacteria.
  • CPI-ESP demonstrated efficacy in reducing aerosolized E. coli and airborne microbes.
  • Cold plasma treatment caused varying degrees of E. coli cell membrane damage.

Conclusions:

  • Cold plasma technology, particularly CPI-ESP, shows significant potential for controlling airborne infectious diseases.
  • The technology is effective against both surface and airborne microbes in diverse environments.
  • Understanding the disinfection mechanism aids in optimizing cold plasma applications for public health.