Physico-chemistry from initial bacterial adhesion to surface-programmed biofilm growth

Carniello, Vera; Peterson, Brandon W.; Mei, Henny C. van der; Busscher, Henk J.

doi:10.1016/j.cis.2018.10.005

Cited by 301 publications

(236 citation statements)

References 153 publications

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“…Recent studies have shown that the sessile bacteria can secrete exopolymeric substances (EPS), such as proteins, DNA, and polysaccharides, to embed sessile cells to withstand adverse external conditions. Moreover, there is the exchange and transmission of mass, energy, and information among different species in the bio film (Vera et al, 2018), which makes the bio film an ecosystem different from the bulk fluid of the leaching solution. It is in this micro-ecological environment underneath a bio film, there are a lower pH and higher iron ion concentrations due to a higher volumetric sessile cell density than the planktonic cell density, so that acidophilic microorganisms can maintain a strong bioleaching activity.…”

Section: Bio Film Under the Condition Of Stress By LI Ion And Cobalt Ionmentioning

confidence: 99%

Oxidative Stress Induced by Metal Ions in Bioleaching of LiCoO2 by an Acidophilic Microbial Consortium

Liu

Líu

et al. 2020

Front. Microbiol.

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An acidophilic microbial consortium (AMC) was used to investigate the fundamental mechanism behind the adverse effects of pulp density increase in the bioleaching of waste lithium ion batteries (WLIBs). Results showed that there existed the effect of metal-ion stress on the bio-oxidative activity of AMC. The Li + and Co 2+ accumulated in the leachate were the direct cause for the decrease in lithium and cobalt recovery yields under a high pulp density. In a simulated bioleaching system with 4.0% (w •v −1) LiCoO 2 , the intracellular reactive oxygen species (ROS) content in AMC increased from 0.82 to 6.02 within 24 h, which was almost three times higher than that of the control (2.04). After the supplementation of 0.30 g•L −1 of exogenous glutathione (GSH), the bacterial intracellular ROS content decreased by 40% within 24 h and the activities of intracellular ROS scavenging enzymes, including glutathione peroxidase (GSH-Px) and catalase (CAT), were 1.4-and 2.0-folds higher in comparison with the control within 24 h. In the biofilms formed on pyrite in the bioleaching of WLIBs, it was found that metal-ion stress had a great influence on the 3-D structure and the amount of biomass of the biofilms. After the exogenous addition of GSH, the structure and the amount of biomass of the biofilms were restored to some extent. Eventually, through ROS regulation by the exogenous addition of GSH, very high metal recovery yields of 98.1% Li and 96.3% Co were obtained at 5.0% pulp density.

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Section: Bio Film Under the Condition Of Stress By LI Ion And Cobalt Ionmentioning

confidence: 99%

Oxidative Stress Induced by Metal Ions in Bioleaching of LiCoO2 by an Acidophilic Microbial Consortium

Liu

Líu

et al. 2020

Front. Microbiol.

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“…This result, however, indicates a beneficial mechanism of antibacterial activity of Zn doped coatings, which reduce the number of bacteria colonizing the surface more than only contributing to their death. In the absence of the reduction of colonization intensity on the surface, dead bacteria would create a layer isolating newly settled cells from the coating containing an antibacterial agent, which would promote the formation of a bacterial biofilm [3,42]. Prevention of bacterial biofilm formation, observed in the case of Zn doped coatings, is a key feature of antibacterial touch surfaces [1,6,43].…”

Section: Coatings 2019 9 X For Peer Review 12 Of 14mentioning

confidence: 99%

“…Microorganisms living on the touch surfaces can transfer onto the human body during interaction and contribute to the spread of infections [2]. One of the preconditions for the presence of microorganisms on the surfaces of materials is their ability to adhere, which allows the colonization of the surface and the development of a bacterial biofilm [3,4], that is, a source of potential infection associated with the use of materials [5,6]. In addition, microorganisms colonizing surfaces of materials may change their functionality and structure, and even cause degradation (biocorrosion phenomenon) [7].…”

Section: Introductionmentioning

confidence: 99%

“…These properties, especially increased resistance to colonization and multiplication by bacteria, can be obtained by modifying the surface layer of the material [1,[10][11][12] or by depositing antibacterial coatings with appropriate chemical and physical properties [13][14][15][16]. Particularly important, along with free surface energy and surface charge [3,4,17], are hydrophobic properties of the surface, preventing bacterial adhesion and precluding their multiplication. Very important is the degree of surface hydrophobicity [17] and the hydrophobic or hydrophilic properties of the cell walls of the bacteria themselves [18].…”

Section: Introductionmentioning

confidence: 99%

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Antibacterial Properties of Zn Doped Hydrophobic SiO2 Coatings Produced by Sol-Gel Method

et al. 2019

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Bacteria existing on the surfaces of various materials can be both a source of infection and an obstacle to the proper functioning of structures. Increased resistance to colonization by microorganisms can be obtained by applying antibacterial coatings. This paper describes the influence of surface wettability and amount of antibacterial additive (Zn) on bacteria settlement on modified SiO2-based coatings. The coatings were made by sol-gel method. The sols were prepared on the basis of tetraethoxysilane (TEOS), modified with methyltrimethoxysilane (MTMS), hexamethyldisilazane (HMDS) and the addition of zinc nitrate or zinc acetate. Roughness and surface wettability tests, as well as study of the chemical structure of the coatings were carried out. The antibacterial properties of the coatings were checked by examining their susceptibility to colonization by Escherichia coli. It was found that the addition of zinc compound reduced the susceptibility to colonization by E. coli, while in the studied range, roughness and hydrophobicity did not affect the level of bacteria adhesion to the coatings.

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“…Surface properties of Ti implants are known as key factors for biofilm formation [14]. Indeed, surface chemistry and functional groups on the surface also influence bacterial adhesion [15]. Decreased bacterial colonization on TiO 2 coatings is observed even though these surfaces promote osteoblast adhesion and differentiation [14].…”

Section: Introductionmentioning

confidence: 99%

Advanced surface treatment techniques counteract biofilm-associated infections on dental implants

Koopaie

Bordbar‐Khiabani

Kolahdooz

et al. 2020

Mater. Res. Express

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Topography and surface chemistry can significantly affect biofilm formation on dental implants. Recently, the γ-TiAl alloy was considered as the most reliable candidates for the preparation of dental implants because of its excellent mechanical strength, chemical stability and biocompatibility. The emphasis of this study lies in the effects of high-speed milling assisted the minimum quantity of lubrication (HSM-MQL), micro-current wire electrical discharge machining (mWEDM), Er,Cr:YSGG laser and sandblasting/largegrit/acid-etching (SLA) treatments on surface morphology, topography, chemical composition, wettability and biofilm-associated infections on the surface of each group. The surface-treated samples were analyzed using a scanning electron microscope (SEM), SEM surface reconstruction, energy dispersive x-ray spectroscopy (EDS) and water contact angle measuring system. SEM and topography images of mWEDM and laser-treated surfaces showed more irregular surfaces compared to SLA and HSM-MQL surfaces. Results showed that mWEDM and laser-treated surfaces revealed hydrophobic behavior. A significant decrease of biofilm formation was observed on mWEDM treated surface due to the hydrophobicity and existence of the copper element in the recast layer chemical composition. Moreover, EDS confirmed that the zirconium, silicon, and fluorine elements were decorated onto the SLA treated γ-TiAl surface that can have a direct effect on the anti-bacterial activity.

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Physico-chemistry from initial bacterial adhesion to surface-programmed biofilm growth

Cited by 301 publications

References 153 publications

Oxidative Stress Induced by Metal Ions in Bioleaching of LiCoO2 by an Acidophilic Microbial Consortium

Oxidative Stress Induced by Metal Ions in Bioleaching of LiCoO2 by an Acidophilic Microbial Consortium

Antibacterial Properties of Zn Doped Hydrophobic SiO2 Coatings Produced by Sol-Gel Method

Advanced surface treatment techniques counteract biofilm-associated infections on dental implants

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