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Chemical Agents for Microbial Control01:27

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Chemicals play important roles in controlling microbial growth by targeting microbial structures and functions as sanitizers, antiseptics, disinfectants, and sterilants.Alcohols are commonly used sanitizers, effectively disrupting lipid membranes, which compromises cell integrity. They are also used as antiseptics and disinfectants due to their rapid action and versatility.Phenols and their derivatives phenolics , known for denaturing proteins and disrupting cell membranes, are particularly...
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Radiation and filtration are essential tools for microbial control, targeting microorganisms through distinct mechanisms. Radiation eliminates microbes by damaging their DNA, either killing them or inhibiting their growth. Based on wavelength, radiation is classified into two types: nonionizing and ionizing radiation.Non-ionizing radiation, such as UV radiation (200–400 nm), is absorbed by DNA, causing defects that effectively disinfect surfaces, air, and water, including safety cabinets.
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Microbial growth control refers to various methods employed to inhibit, reduce, or eliminate microorganisms to ensure safety and hygiene across different settings. These methods are categorized based on the target environment and the level of microbial control required.Biocides are versatile agents designed to control microorganisms by either inhibiting their growth or outright killing them. These agents work through various physical, chemical, mechanical, or biological mechanisms. The...
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Plasma-Activated Hydrogels for Microbial Disinfection.

Jinkun Chen1, Zifeng Wang1, Jiachen Sun1

  • 1State Key Laboratory of Electrical Insulation and Power Equipment, Centre for Plasma Biomedicine, Xi'an Jiaotong University, Xi'an City, 710049, People's Republic of China.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|March 17, 2023
PubMed
Summary
This summary is machine-generated.

Plasma-activated hydrogels offer a novel solution for long-term antibacterial effects by storing reactive species. The acryloyldimethylammonium taurate/VP copolymer hydrogel demonstrated superior antimicrobial activity and stability for over 14 days.

Keywords:
antibacterial effectlong-term activityplasma-activated hydrogelreactive species

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Area of Science:

  • Biomaterials Science
  • Microbiology
  • Plasma Physics

Background:

  • Microbial infections present a persistent environmental and public health threat.
  • Plasma-activated water (PAW) shows promise as an eco-friendly antimicrobial agent but suffers from short reactive species lifetime and limited applicability.
  • Developing stable carriers for reactive species is crucial for sustained antimicrobial action.

Purpose of the Study:

  • To develop and evaluate plasma-activated hydrogels (PAHs) as long-term carriers for reactive oxygen and nitrogen species (RONS).
  • To investigate the antibacterial efficacy of PAHs based on different hydrogel compositions.
  • To elucidate the mechanisms behind the sustained antimicrobial activity of PAHs.

Main Methods:

  • Three hydrogel materials (HEC, Carbomer, AVC) were synthesized and activated using plasma.
  • The antibacterial performance of PAHs was assessed against a broad range of microorganisms.
  • The stability and RONS storage capacity of PAHs were evaluated over time.
  • Mechanistic studies were performed to identify the key reactive species responsible for antimicrobial activity.

Main Results:

  • The acryloyldimethylammonium taurate/VP copolymer (AVC) hydrogel exhibited significantly enhanced antimicrobial performance compared to PAW and other tested hydrogels.
  • AVC-based PAHs demonstrated excellent stability, maintaining antimicrobial activity for over 14 days.
  • The study identified a unique combination of short-lived RONS (singlet oxygen, hydroxyl radical, peroxynitrite, superoxide radical) stored within the hydrogels as key contributors to antibacterial effects.

Conclusions:

  • Plasma-activated hydrogels, particularly AVC-based formulations, are effective and stable long-term disinfectants.
  • PAHs offer a promising platform for controlled delivery and preservation of antibacterial chemistries.
  • This technology has significant potential for various biomedical applications requiring sustained antimicrobial action.