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Nisin-Loaded Ulvan Particles: Preparation and Characterization.

Ruta Gruskiene1, Tatjana Kavleiskaja2, Ramune Staneviciene3

  • 1Department of Chemistry and Bioengineering, Vilnius Gediminas Technical University, 10221 Vilnius, Lithuania.

Foods (Basel, Switzerland)
|June 2, 2021
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Summary

Ulvan particles effectively encapsulate the antimicrobial peptide nisin, offering a stable biopreservative alternative. These nisin-loaded ulvan particles show comparable antimicrobial activity against Gram-positive bacteria, highlighting their food industry potential.

Keywords:
antimicrobial activityencapsulationnisinulvan

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Area of Science:

  • Food Science
  • Biotechnology
  • Materials Science

Background:

  • Nisin, a cationic peptide, is a natural antimicrobial agent effective against Gram-positive bacteria.
  • Chemical preservatives pose stability challenges in food matrices.
  • Developing stable, natural antimicrobial delivery systems is crucial for the food industry.

Purpose of the Study:

  • To develop novel nisin-loaded ulvan particles for enhanced stability and application as a biopreservative.
  • To characterize the interaction, encapsulation efficiency, and physical properties of nisin-ulvan complexes.
  • To evaluate the antimicrobial efficacy of the developed nisin-loaded ulvan particles.

Main Methods:

  • Complexation method used to create nisin-loaded ulvan particles.
  • Fourier-transform infrared (FT-IR) spectroscopy and differential scanning calorimetry (DSC) to confirm nisin-ulvan interaction.
  • Encapsulation efficiency determined at various pH levels (4.0-7.0).
  • Particle size and surface charge analyzed under different nisin concentrations and pH values.

Main Results:

  • Successful fabrication of nisin-loaded ulvan particles via complexation.
  • Confirmation of nisin-ulvan interaction using FT-IR and DSC.
  • Optimal encapsulation efficiency achieved at pH 7.0.
  • Nisin-loaded ulvan particles demonstrated comparable antimicrobial activity to free nisin against Gram-positive bacteria.

Conclusions:

  • Ulvan serves as a viable carrier for the antimicrobial peptide nisin.
  • Nisin-loaded ulvan particles offer a promising, stable biopreservative solution for the food industry.
  • This study demonstrates the novel potential of ulvan in encapsulating antimicrobial agents for food applications.