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Coatings
Special Issues
Biofilms: Composition and Applications
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Biofilms: Composition and Applications

A special issue of Coatings (ISSN 2079-6412). This special issue belongs to the section "Bioactive Coatings and Biointerfaces".

Deadline for manuscript submissions: closed (31 December 2023) | Viewed by 6460

Special Issue Editors

Dr. Bindu Subhadra

E-Mail Website
Guest Editor
College of Veterinary Medicine, Long Island University, Brookville, NY 11548, USA
Interests: gene regulation; multidrug efflux pumps; quorum sensing; biofilms; virulence; pathogenesis; sRNA regulation; infectious diseases; carbohydrate metabolism; biocompatibility of biomaterials
Special Issues, Collections and Topics in MDPI journals
Dr. Andrei Vladislavovich Gannesen

E-Mail Website
Co-Guest Editor
Federal Research Centre “Fundamentals of Biotechnology” of the Russian Academy of Sciences, Moscow 117312, Russian Federation
Interests: biofilms; microorganisms

Special Issue Information

Dear Colleagues,

Biofilms are composed of a complex three-dimensional extracellular matrix in which bacteria are embedded. The matrix is composed of extracellular polymeric substances (EPSs) attributed to the unique lifestyle of bacterial biofilms. As biofilms provide mechanical cohesive stability, the microorganisms embedded in the biofilm matrix show a high survival rate and persistence. In addition, biofilm formation promotes the colonization of bacteria in almost all kinds of surfaces, including natural and synthetic surfaces. Recently, biofilms have been intentionally engineered for various applications exploiting their unique properties. In this Special Issue, we focus on the composition of biofilms (natural and artificial) and their application in different fields, including agricultural, environmental, medical, and industrial biotechnology. The topics of interest for this Special Issue include (but are not limited to):

  • Application of biofilms in industry;
  • Biofilms for improved enzymatic activity;
  • Nanoparticles and biofilm formation;
  • Biofilms and improved plant growth;
  • Biofilms and bioremediation;
  • Viscoelastic properties and surface topography of biofilms for biotechnological applications;
  • Biofilms coatings as anticorrosive tools;
  • Biofilms for erosion resistance;
  • Biofilms for medical applications;
  • Biofilms in construction materials;
  • Any other biofilm applications.

 

Dr. Bindu Subhadra
Guest Editor

Dr. Andrei Vladislavovich Gannesen
co-Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Coatings is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Biofilms
  • Extracellular polymeric substance (EPS)
  • Biofilms and bioremediation
  • Biofilms as anticorrosive tool
  • Biofilms for erosion resistance
  • Biofilms for medical applications
  • Biofilms in construction materials
  • Biofilms in industry
  • Biofilms and improved plant growth

Published Papers (4 papers)

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Editorial

Jump to: Research

4 pages, 196 KiB  
Editorial
Special Issue: Biofilm Composition and Applications
by Bindu Subhadra
Coatings 2022, 12(7), 1026; https://doi.org/10.3390/coatings12071026 - 20 Jul 2022
Viewed by 1342
Abstract
Biofilms can be formed on both biotic and abiotic surfaces, including on living tissues, indwelling medical devices, industrial or portable water system piping, and natural aquatic systems [...] Full article
(This article belongs to the Special Issue Biofilms: Composition and Applications)

Research

Jump to: Editorial

12 pages, 1590 KiB  
Article
Thin Cationic Polymer Coatings against Foodborne Infections
by Yuliya K. Yushina, Andrey V. Sybachin, Oksana A. Kuznecova, Anastasia A. Semenova, Eteri R. Tolordava, Vladislava A. Pigareva, Anastasiya V. Bolshakova, Vyacheslav M. Misin, Alexey A. Zezin, Alexander A. Yaroslavov, Dagmara S. Bataeva, Elena A. Kotenkova, Elena V. Demkina and Maksim D. Reshchikov
Coatings 2023, 13(8), 1389; https://doi.org/10.3390/coatings13081389 - 08 Aug 2023
Cited by 1 | Viewed by 995
Abstract
Biocidal coatings are known to minimize or terminate development of bacterial and fungicidal infections. In this paper, biocidal activity of seven cationic (co)polymers with amino groups—polyethyleneimine, polyallylamine, polydiallyldimethylammonium chloride/polyhexamethylene guanidine copolymer, diallyldimethylammonium chloride/SO2 copolymer, linear and hyperbranched epichlorohydrin/dimethylamine copolymers, polydiallyldimethylammonium chloride—were tested [...] Read more.
Biocidal coatings are known to minimize or terminate development of bacterial and fungicidal infections. In this paper, biocidal activity of seven cationic (co)polymers with amino groups—polyethyleneimine, polyallylamine, polydiallyldimethylammonium chloride/polyhexamethylene guanidine copolymer, diallyldimethylammonium chloride/SO2 copolymer, linear and hyperbranched epichlorohydrin/dimethylamine copolymers, polydiallyldimethylammonium chloride—were tested toward Gram-positive and Gram-negative cells. The polymers showed a significant biocidal effect in both aqueous solution and after formation of polymer films on the hydrophilic glass plates. Polymer films were almost completely removed by water during 10 wash-off cycles, that finally resulted in the ultrathin monolayers with a thickness of several nanometers. A polyethyleneimine film showed the most resistance to water with a 50% loss after three wash-off cycles and 75% loss after six wash-off cycles. Binding and subsequent deactivation of pathogenic microorganisms occurs on the outer surface of cationic polymer films. It is expected that a gradual polymer wash-off will allow renewal of the outer film surface and thereby restore the biocidal properties of the polycationic coatings, including those with a nanoscale thickness. Full article
(This article belongs to the Special Issue Biofilms: Composition and Applications)
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16 pages, 4798 KiB  
Article
New Approach to Improving the Efficiency of Disinfectants against Biofilms
by Elena V. Demkina, Ekaterina A. Ilicheva, Galina I. El-Registan, Timofey A. Pankratov, Yulia K. Yushina, Anastasia A. Semenova and Yuriy A. Nikolaev
Coatings 2023, 13(3), 582; https://doi.org/10.3390/coatings13030582 - 07 Mar 2023
Cited by 1 | Viewed by 1497
Abstract
The resistance of microorganisms’ biofilms to antibacterials is a problem both for medicine and for many industries. Increasing the effectiveness of antimicrobial agents is an urgent task. The goal of the present work was to develop a new approach to development of anti-biofilm [...] Read more.
The resistance of microorganisms’ biofilms to antibacterials is a problem both for medicine and for many industries. Increasing the effectiveness of antimicrobial agents is an urgent task. The goal of the present work was to develop a new approach to development of anti-biofilm compositions based on conventional disinfectants in combination with enhancers (adjuvants). Methods of microbiology (viable cells count, model biofilms) and electron microscopy were employed. This research formulates the principles for selection of adjuvants. The adjuvants should: (1) increase the efficiency of decomposition of the biofilm matrix or/and (2) suppress the microbial protective mechanisms. For testing anti-biofilm compositions, two models of biofilms have been developed, on a solid surface at the interface with air or liquid. It was demonstrated that hydrogen peroxide, ethanol, isopropanol, and 4-hexylresorcinol enhanced the biocidal effect of disinfectants based on oxidants (peroxides and chlorine-containing) and quaternary ammonium salts by three to six orders of magnitude. Mechanisms of adjuvant action were mechanical decomposition of the matrix (by oxygen bubbles formed inside a biofilm in the case of hydrogen peroxide), coagulation of matrix polymers (in the case of alcohols), and a decrease in metabolism (in the case of 4-hexylresorcinol). The use of approved chemicals as adjuvants will accelerate the design of effective anti-biofilm antiseptics for medicine, social hygiene, and food manufactures and other industries. Full article
(This article belongs to the Special Issue Biofilms: Composition and Applications)
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21 pages, 3422 KiB  
Article
Forms of Bacterial Survival in Model Biofilms
by Timofei A. Pankratov, Yuri A. Nikolaev, Yulia K. Yushina, Ekaterina N. Tikhonova and Galina I. El-Registan
Coatings 2022, 12(12), 1913; https://doi.org/10.3390/coatings12121913 - 07 Dec 2022
Cited by 2 | Viewed by 1616
Abstract
Bacterial survival upon sharp fluctuations of environmental parameters and exposure to lethal doses of stressors (antibiotics, disinfectants, heat shock, and others) is ensured by the use of different strategies of resistance, an important place among which is occupied by the forms with reduced [...] Read more.
Bacterial survival upon sharp fluctuations of environmental parameters and exposure to lethal doses of stressors (antibiotics, disinfectants, heat shock, and others) is ensured by the use of different strategies of resistance, an important place among which is occupied by the forms with reduced or stopped metabolism, antibiotic tolerant (AT) persister (P) cells, anabiotic dormant forms (DFs), and viable but non-culturable (VBNC) cells. Elucidating the role of these forms of bacterial resistance to an impact of chemical and biological toxicants and physical stressors is of great fundamental and practical interest. The aim of this research was to study the dynamics of the resistance forms in bacteria developing in biofilms and, for comparison in liquid media, upon exposure to lethal doses of antibiotics and heat shock (80 °C, 15 min). In the trials, the experimental model of the development of monospecies and binary forms of bacterial biofilms including contaminants of meat products (eight strains of genera Pseudomonas, Escherichia, Salmonella, Staphylococcus, and Kocuria) on the fiberglass filters was used. It was established that survival of populations in the presence of lethal doses of antibiotics and upon heating was ensured by persister cells forming in bacterial populations and, at the late stages of the development of biofilm or planktonic cultures (28 days of incubation), by anabiotic DFs. With that, the number of thermoresistant (TR) DFs (103–104 CFU/mL) in dying biofilms (28 days) developing in the standard conditions (composition and volume of a medium, pH, growth temperature) weakly depended on the bacterial taxonomic status. This study demonstrates the heterogeneity of DF populations of biofilm bacterial cultures in terms of the depth of dormancy, as a result of which the number of thermoresistant DFs after heating can exceed their total number before heating (due to the effect of DF revival, resuscitation). When studying the dynamics of TR cells and P cells in bacterial biofilm and planktonic cultures, it was found that their number (CFU/mL) in populations decreased up to the absence of TR cells and P cells on the 21st day of growth and was restored on the 28th day of growth. The revealed phenomenon can be explained only by cardinal changes in the ultrastructural organization of cells, namely, cytoplasm vitrification due to a sharp decrease in an amount of free water in a cell, which, according to the results obtained, occurs in the period between the 21st and 28th days of incubation. A high degree of correlation between the number of AT cells and TR cells (0.5–0.92) confirms the hypothesis that regards P cells as precursors of DFs. Full article
(This article belongs to the Special Issue Biofilms: Composition and Applications)
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