Liquid-crystalline ordering in bacterial cellulose produced by Gluconacetobaсter hansenii on glucose-containing media

Zefirov, Vadim V.; Садыкова, В. С.; Ivanenko, I. P.; Kuznetsova, O. P.; Butenko, I. E.; Громовых, Т. И.; Kiselyova, Olga I.

doi:10.1016/j.carbpol.2022.119692

Cited by 3 publications

(4 citation statements)

References 57 publications

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“…It was shown [46,47] that during cellulose cultivation, thin primary layers are first formed and then new thicker secondary layers are formed on top, the density of which is not uniform due to a decrease in the concentration of the carbon source over time [48]. It was found that primary layers with a diameter of about 1.3 µm are present in the structures of the obtained BCF, which are at a distance of 4-5 µm from each other, forming areas with a low density of fibrils.…”

Section: Resultsmentioning

confidence: 98%

Hybrid Silver-Containing Materials Based on Various Forms of Bacterial Cellulose: Synthesis, Structure, and Biological Activity

Vasil’kov

Butenko

Naumkin

et al. 2023

IJMS

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Sustained interest in the use of renewable resources for the production of medical materials has stimulated research on bacterial cellulose (BC) and nanocomposites based on it. New Ag-containing nanocomposites were obtained by modifying various forms of BC with Ag nanoparticles prepared by metal–vapor synthesis (MVS). Bacterial cellulose was obtained in the form of films (BCF) and spherical BC beads (SBCB) by the Gluconacetobacter hansenii GH-1/2008 strain under static and dynamic conditions. The Ag nanoparticles synthesized in 2-propanol were incorporated into the polymer matrix using metal-containing organosol. MVS is based on the interaction of extremely reactive atomic metals formed by evaporation in vacuum at a pressure of 10−2 Pa with organic substances during their co-condensation on the cooled walls of a reaction vessel. The composition, structure, and electronic state of the metal in the materials were characterized by transmission and scanning electron microscopy (TEM, SEM), powder X-ray diffraction (XRD), small-angle X-ray scattering (SAXS) and X-ray photoelectron spectroscopy (XPS). Since antimicrobial activity is largely determined by the surface composition, much attention was paid to studying its properties by XPS, a surface-sensitive method, at a sampling depth about 10 nm. C 1s and O 1s spectra were analyzed self-consistently. XPS C 1s spectra of the original and Ag-containing celluloses showed an increase in the intensity of the C-C/C-H groups in the latter, which are associated with carbon shell surrounding metal in Ag nanoparticles (Ag NPs). The size effect observed in Ag 3d spectra evidenced on a large proportion of silver nanoparticles with a size of less than 3 nm in the near-surface region. Ag NPs in the BC films and spherical beads were mainly in the zerovalent state. BC-based nanocomposites with Ag nanoparticles exhibited antimicrobial activity against Bacillus subtilis, Staphylococcus aureus, Escherichia coli bacteria and Candida albicans and Aspergillus niger fungi. It was found that AgNPs/SBCB nanocomposites are more active than Ag NPs/BCF samples, especially against Candida albicans and Aspergillus niger fungi. These results increase the possibility of their medical application.

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Section: Resultsmentioning

confidence: 98%

Hybrid Silver-Containing Materials Based on Various Forms of Bacterial Cellulose: Synthesis, Structure, and Biological Activity

Vasil’kov

Butenko

Naumkin

et al. 2023

IJMS

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“…[48][49][50] EPS are primarily comprised of exopolysaccharides, proteins, and extracellular DNA (eDNA), [51][52][53] although the species of bacteria and biofilm formation conditions are different (Table 2). [54,56] Exopolysaccharides, including glucans, fructans, galactans, mannans, and so on, are perfect molecules for promoting primary bacterial adhesion on surfaces and formatting 3D scaffold in biofilms. [52,[57][58][59][60][61] Proteins benefit stabilization of the matrix network formed by polysaccharides, and increase binding between bacterial cells.…”

Section: Targets In Biofilmsmentioning

confidence: 99%

“…[ 48–50 ] EPS are primarily comprised of exopolysaccharides, proteins, and extracellular DNA (eDNA), [ 51–53 ] although the species of bacteria and biofilm formation conditions are different ( Table 2 ). [ 54,56 ]…”

Section: Targeting Biofilmsmentioning

confidence: 99%

Strategies to Promote the Journey of Nanoparticles Against Biofilm‐Associated Infections

Wang,

et al. 2024

Small

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Biofilm‐associated infections are one of the most challenging healthcare threats for humans, accounting for 80% of bacterial infections, leading to persistent and chronic infections. The conventional antibiotics still face their dilemma of poor therapeutic effects due to the high tolerance and resistance led by bacterial biofilm barriers. Nanotechnology‐based antimicrobials, nanoparticles (NPs), are paid attention extensively and considered as promising alternative. This review focuses on the whole journey of NPs against biofilm‐associated infections, and to clarify it clearly, the journey is divided into four processes in sequence as 1) Targeting biofilms, 2) Penetrating biofilm barrier, 3) Attaching to bacterial cells, and 4) Translocating through bacterial cell envelope. Through outlining the compositions and properties of biofilms and bacteria cells, recent advances and present the strategies of each process are comprehensively discussed to combat biofilm‐associated infections, as well as the combined strategies against these infections with drug resistance, aiming to guide the rational design and facilitate wide application of NPs in biofilm‐associated infections.

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“…During the exploration of wound dressings, bacterial cellulose (BC) has gradually become one of the focal points due to its ideal characteristics. Since the first report of BC, [ 3 ] researchers have successively discovered a series of BC‐producing strains, such as Gluconacetobacter , [ 4 ] Acetobacter , [ 5 ] Komagataeibacter , [ 6 ] Agrobacterium , [ 7 ] Aerobacter , [ 8 ] Azotobacter , [ 9 ] Achromobacter , [ 10 ] Rhizobium , [ 11 ] Salmonella , [ 12 ] and some Gram‐positive bacteria. [ 13 ] BC is a linear polymer composed of β‐ d ‐glucose linked by β‐1,4‐glycosidic bonds, and its chemical structure is similar to that of plant cellulose.…”

Section: Introductionmentioning

confidence: 99%

Bacterial Cellulose Applied in Wound Dressing Materials: Production and Functional Modification – A Review

Hou,

Xia,

Pan

et al. 2023

Macromolecular Bioscience

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In recent years, the development of new type wound dressings has gradually attracted more attention. Bacterial cellulose (BC) is a natural polymer material with various unique properties, such as ultrafine three‐dimensional nano‐network structure, high water retention capacity and biocompatibility. These properties allow BC to be used independently or in combination with different components (such as biopolymers and nanoparticles) to achieve diverse effects. This means that BC has great potential as a wound dressing. However, systematic summaries for the production and commercial application of BC‐based wound dressings are still lacked. Therefore, this review provides a detailed introduction to the production fermentation process of BC, including various production strains and their biosynthetic mechanisms. Subsequently, with regard to the functional deficiencies of bacterial cellulose as a wound dressing, recent research progress in this area are enumerated. Finally, prospects are discussed for the low‐cost production and high‐value‐added product development of BC‐based wound dressings.This article is protected by copyright. All rights reserved

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Liquid-crystalline ordering in bacterial cellulose produced by Gluconacetobaсter hansenii on glucose-containing media

Cited by 3 publications

References 57 publications

Hybrid Silver-Containing Materials Based on Various Forms of Bacterial Cellulose: Synthesis, Structure, and Biological Activity

Hybrid Silver-Containing Materials Based on Various Forms of Bacterial Cellulose: Synthesis, Structure, and Biological Activity

Strategies to Promote the Journey of Nanoparticles Against Biofilm‐Associated Infections

Bacterial Cellulose Applied in Wound Dressing Materials: Production and Functional Modification – A Review

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