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Related Concept Videos

Surface Membrane Barriers01:18

Surface Membrane Barriers

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The skin and mucous membranes serve as the primary line of defense against pathogens by providing both physical and chemical protection. These barriers are essential in preventing the entry and establishment of microbes, thereby maintaining the integrity of the host.
The outer layer of the skin, the epidermis, is a robust barrier comprising layers of closely packed keratinized cells. This dense arrangement prevents microbes from penetrating the body. The periodic shedding of epidermal cells...
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Preparation and Reactions of Sulfides02:26

Preparation and Reactions of Sulfides

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Sulfides are the sulfur analog of ethers, just as thiols are the sulfur analog of alcohol. Like ethers, sulfides also consist of two hydrocarbon groups bonded to the central sulfur atom. Depending upon the type of groups present, sulfides can be symmetrical or asymmetrical. Symmetrical sulfides can be prepared via an SN2 reaction between 2 equivalents of an alkyl halide and one equivalent of sodium sulfide.
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Updated: May 20, 2025

Antimicrobial Characterization of Advanced Materials for Bioengineering Applications
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Water-Soluble Sulfur-Ylide-Functionalized Polyacrylamides for Antibacterial Surface Applications.

Bela B Berking1, Dimitrios Karagrigoriou1, Daria R Galimberti2

  • 1Systems Chemistry Department, Institute for Molecules and Materials, Radboud University, Heyendaalseweg 135, 6525 AJ Nijmegen, The Netherlands.

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|March 24, 2025
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Summary

New water-soluble poly(sulfur ylides) offer effective surface antimicrobial properties without solution cytotoxicity. These advanced materials show promise for developing safer antifouling coatings in healthcare applications.

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Synthesis of Hydrogels with Antifouling Properties As Membranes for Water Purification
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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Biomedical Engineering

Background:

  • Surface fouling by biomolecules and microbes is a major challenge in healthcare, leading to infections and antimicrobial resistance.
  • Current antifouling strategies often involve hydration layers or cytotoxic agents.
  • Zwitterionic polymers from ylides present a novel approach, with sulfur ylides being less explored than N-oxide ylides.

Purpose of the Study:

  • To develop and characterize a water-soluble poly(sulfur ylide) for antifouling and antimicrobial applications.
  • To compare its properties with hydrophobic polystyrene-derived analogues.
  • To elucidate the mechanisms behind its antifouling and antimicrobial actions.

Main Methods:

  • Synthesis of a water-soluble acrylamide-based poly(sulfur ylide).
  • Comparative analysis with hydrophobic polystyrene-derived poly(sulfur ylides).
  • Computational modeling and genetic analysis to investigate interaction mechanisms.

Main Results:

  • Water-soluble poly(sulfur ylides) exhibit surface antimicrobial activity but lack solution cytotoxicity.
  • Hydrophobic analogues show stronger interactions and enhanced antimicrobial effects due to backbone hydrophobicity.
  • Computational and genetic data indicate outer membrane destabilization by both polymer types.

Conclusions:

  • Water-soluble poly(sulfur ylides) offer a safer alternative with retained surface antimicrobial efficacy.
  • Hydrophobicity plays a key role in the interaction strength and efficacy of these polymers.
  • Further research into supramolecular behavior is needed to optimize antifouling and antimicrobial properties.