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Cellulose and Pectic Polysaccharides01:15

Cellulose and Pectic Polysaccharides

Every plant cell has a cell wall that protects the cell, provides structural support, and gives the cell shape. Cellulose, the main structural component of the plant cell wall, makes up over 30% of plant matter. It is the most abundant organic compound on earth.  Cellulose is an unbranched polysaccharide composed of linear chains of glucose molecules linked by β (1→4) glycosidic bonds.
As a cell matures, its cell wall specializes according to its type. For example, the parenchyma cells of...

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Microfluidic Co-culture of Epithelial Cells and Bacteria for Investigating Soluble Signal-mediated Interactions
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A Microbial Co-Culturing System for Producing Cellulose-Hyaluronic Acid Composites.

Marcello Brugnoli1, Ilaria Mazzini1, Salvatore La China1

  • 1Unimore Microbial Culture Collection Laboratory, Department of Life Sciences, University of Modena and Reggio Emilia, 42124 Reggio nell'Emilia, Italy.

Microorganisms
|June 28, 2023
PubMed
Summary

This study developed a co-culture system for bacterial cellulose (BC) and hyaluronic acid (HA) composites. The resulting BC-HA materials showed improved water holding capacity and antibacterial properties, suggesting potential cosmetic and pharmaceutical applications.

Keywords:
acetic acid bacteriabacterial celluloseco-culturehyaluronic acidlactic acid bacteriasustainable composites

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Area of Science:

  • Biotechnology
  • Materials Science
  • Microbiology

Background:

  • Bacterial cellulose (BC) and hyaluronic acid (HA) are valuable biopolymers with distinct properties.
  • Developing integrated systems for producing BC and HA composites can lead to novel biomaterials.

Purpose of the Study:

  • To create and characterize co-culture systems combining BC and HA producers.
  • To evaluate the structural, physical, and antibacterial properties of the resulting BC-HA composites.

Main Methods:

  • Co-culturing of *Komagataeibacter* sp. (BC producers) and *Lactocaseibacillus* sp. (HA producers) in four combinations.
  • Analysis of BC-HA composites using Fourier-transform infrared spectroscopy, scanning electron microscopy, and X-ray diffraction.
  • Assessment of water absorption, water uptake, and antibacterial activity, including a thymol-enriched composite.

Main Results:

  • Successful co-culture system yielding higher BC production and HA incorporation into the composite.
  • Hyaluronic acid increased fiber dimensions, leading to decreased composite crystallinity.
  • All BC-HA composites exhibited improved water holding capacity, while water uptake decreased.
  • A thymol-enriched BC-HA composite demonstrated significant antibacterial activity against *Escherichia coli* and *Staphylococcus aureus*.

Conclusions:

  • The co-culture approach effectively produced BC-HA composites with modified properties.
  • The presence of HA significantly influenced the structural and water-related characteristics of BC.
  • The developed BC-HA composites, especially when enriched with thymol, show promise for cosmetic and pharmaceutical applications.