Roughness and wettability of biofilm carriers: A systematic review

Al‐Amshawee, Sajjad Khudhur Abbas; Yunus, Mohd Yusri Bin Mohd; Lynam, Joan G.; Lee, Woo Hyoung; Dai, Fei; Dakhil, Ihsan Habib

doi:10.1016/j.eti.2020.101233

Cited by 84 publications

(35 citation statements)

References 72 publications

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“…55 Highly hydrophobic cells adhere strongly to hydrophobic materials, while hydrophilic cells show the same affinity for hydrophilic surfaces. 56 In this study, both bacterial strains adhered to the neat PVDF-co-HFP membrane, although this adherence was significantly reduced in the presence of the MAG 12 additive. The MAG membranes significantly inhibited biofouling by the Gram-positive and Gram-negative bacteria (Figure 8).…”

Section: Resultsmentioning

confidence: 56%

Antibacterial Filtration Membranes Based on PVDF-co-HFP Nanofibers with the Addition of Medium-Chain 1-Monoacylglycerols

Peer

Janalíková

Sedlaříková

et al. 2021

ACS Appl. Mater. Interfaces

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The efficiency of filtration membranes is substantially lowered by bacterial attachments and potential fouling processes, which reduce their durability and lifecycle. The antibacterial and antifouling properties exhibited by the added materials play a substantial role in their application. We tested a material poly(vinylidene fluoride)-co-hexafluoropropylene (PDVFco-HFP) based on an electrospun copolymer, where an agent was incorporated with a small amount of ester of glycerol consecutively with caprylic, capric, and lauric acids. Each of these three materials differing in the esters (1-monoacylglycerol, 1-MAG) used was prepared with three weighted concentrations of 1-MAG (1, 2, and 3 wt %). The presence of 1-MAG with an amphiphilic structure resulted in the hydrophilic character of the prepared materials that contributed to the filtration performance. The tested materials (membranes) were characterized with rheological, optical (scanning electron microscopy, SEM), Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), and other methods to evaluate antibacterial and antifouling activities. The pure water flux was 6 times higher than that of the neat PVDF-co-HFP membrane when the added 1-MAG attained only 1 wt %. It was experimentally shown that the PVDF-co-HFP/1-MAG membrane with high wettability improved antibacterial activity and antifouling ability. This membrane is highly promising for water treatment due to the safety of antibacterial 1-MAG additives.

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Section: Resultsmentioning

confidence: 56%

Antibacterial Filtration Membranes Based on PVDF-co-HFP Nanofibers with the Addition of Medium-Chain 1-Monoacylglycerols

Peer

Janalíková

Sedlaříková

et al. 2021

ACS Appl. Mater. Interfaces

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“…In this work, planktonic cells had more basic surface charge and stronger hydrophobicity than biofilm cells, implying that planktonic cells still had good auto-aggregating ability and adhesive properties. In addition, better hydrophilicity of biofilm cells might be attributed to the existence of hydrophilic polysaccharides in the biofilm matrix and coverage of hydrophobic membrane components by the biofilm matrix ( Flemming and Wingender, 2010 ; Piwat et al, 2015 ; Al-Amshawee et al, 2021 ).…”

Section: Resultsmentioning

confidence: 99%

Formation of Biofilm by Tetragenococcus halophilus Benefited Stress Tolerance and Anti-biofilm Activity Against S. aureus and S. Typhimurium

et al. 2022

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Tetragenococcus halophilus, a halophilic lactic acid bacterium (LAB), plays an important role in the production of high-salt fermented foods. Generally, formation of biofilm benefits the fitness of cells when faced with competitive and increasingly hostile fermented environments. In this work, the biofilm-forming capacity of T. halophilus was investigated. The results showed that the optimal conditions for biofilm formation by T. halophilus were at 3–9% salt content, 0–6% ethanol content, pH 7.0, 30°C, and on the surface of stainless steel. Confocal laser scanning microscopy (CLSM) analysis presented a dense and flat biofilm with a thickness of about 24 μm, and higher amounts of live cells were located near the surface of biofilm and more dead cells located at the bottom. Proteins, polysaccharides, extracellular-DNA (eDNA), and humic-like substances were all proved to take part in biofilm formation. Higher basic surface charge, greater hydrophilicity, and lower intracellular lactate dehydrogenase (LDH) activities were detected in T. halophilus grown in biofilms. Atomic force microscopy (AFM) imaging revealed that biofilm cultures of T. halophilus had stronger surface adhesion forces than planktonic cells. Cells in biofilm exhibited higher cell viability under acid stress, ethanol stress, heat stress, and oxidative stress. In addition, T. halophilus biofilms exhibited aggregation activity and anti-biofilm activity against Staphylococcus aureus and Salmonella Typhimurium. Results presented in the study may contribute to enhancing stress tolerance of T. halophilus and utilize their antagonistic activities against foodborne pathogens during the production of fermented foods.

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“…This capability of clay chips is likely due to the roughness and porosity of their surface that supports microbial adhesion to the porous structure, which concurred with a number of reports (Yakub and Soboyejo 2012 , Al-Amshawee et al . 2021 ). Taoka et al .…”

Section: Discussionmentioning

confidence: 99%

Clay chips and beads capture in situ barley root microbiota and facilitate in vitro long-term preservation of microbial strains

Abdelfadil

Taha

El-Hadidi

et al. 2022

FEMS Microbiology Ecology

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Capturing the diverse microbiota from healthy and/or stress resilient plants for further preservation and transfer to unproductive and pathogen overloaded soils, might be a tool to restore disturbed plant-microbe interactions. Here, we introduce Aswan Pink Clay as a low-cost technology for capturing and storing the living root microbiota. Clay chips were incorporated into the growth milieu of barley plants and developed under gnotobiotic conditions, to capture and host the rhizospheric microbiota. Afterwards it was tested by both a culture-independent (16S rRNA gene metabarcoding) and -dependent approach. Both methods revealed no significant differences between roots and adjacent clay chips in regard total abundance and structure of the present microbiota. Clay shaped as beads adequately supported the long-term preservation of viable pure isolates of typical rhizospheric microbes, i.e. Bacillus circulans, Klebsiella oxytoca, Sinorhizobium meliloti, and Saccharomyces sp., up to 11 months stored at -20 °C, 4 °C and ambient temperature. The used clay chips and beads have the capacity to capture the root microbiota and to long-term preserve pure isolates. Hence, the developed approach is qualified to build on it a comprehensive strategy to transfer and store complex and living environmental microbiota of rhizosphere towards biotechnological application in sustainable plant production and environmental rehabilitation.

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Roughness and wettability of biofilm carriers: A systematic review

Cited by 84 publications

References 72 publications

Antibacterial Filtration Membranes Based on PVDF-co-HFP Nanofibers with the Addition of Medium-Chain 1-Monoacylglycerols

Antibacterial Filtration Membranes Based on PVDF-co-HFP Nanofibers with the Addition of Medium-Chain 1-Monoacylglycerols

Formation of Biofilm by Tetragenococcus halophilus Benefited Stress Tolerance and Anti-biofilm Activity Against S. aureus and S. Typhimurium

Clay chips and beads capture in situ barley root microbiota and facilitate in vitro long-term preservation of microbial strains

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