Films of bacteria at interfaces

Vaccari, Liana; Molaei, Mehdi; Niepa, Tagbo H. R.; Lee, Daeyeon; Leheny, Robert L.; Stebe, Kathleen J.

doi:10.1016/j.cis.2017.07.016

Cited by 61 publications

(39 citation statements)

References 148 publications

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“…Biocides often target microorganisms that create the original biofilm, usually bacteria. Once the bacteria die, their membranes are not developed and then detached from the surface . Many of the biocidal products are toxic to larger biofouling organisms, such as bivalves and algae.…”

Section: Introductionmentioning

confidence: 99%

“…A few years ago, tributyltin compound (TBT; (C4H9) 3Sn) was used as an antifoulant incorporated into marine paints but was banned in 2008 due to their toxicity against marine organisms. Today, the market requires antifouling compounds consisting of natural substances that are environmentally friendly . Great effort has been directed at identifying these natural compounds that may act as an antifoulant .…”

Section: Introductionmentioning

confidence: 99%

“…Once the bacteria die, their membranes are not developed and then detached from the surface. 9,10 Many of the biocidal products are toxic to larger biofouling organisms, such as bivalves and algae. Biocidal products are incorporated in the coating of antifouling surfaces usually through the incorporation into paints.…”

Section: Introductionmentioning

confidence: 99%

“…Today, the market requires antifouling compounds consisting of natural substances that are environmentally friendly. [5][6][7][8][9][10][11][12][13][14][15] Great effort has been directed at identifying these natural compounds that may act as an antifoulant. [16][17][18][19][20][21][22] In the marine environment, a number of organisms are equipped with natural or chemical defense mechanisms.…”

Section: Introductionmentioning

confidence: 99%

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CuO (Bromosphaerol) and CeMo (8 Hydroxyquinoline) microcontainers incorporated into commercial marine paints

Κορδάς

2019

J Am Ceram Soc

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We developed CuO and CeMo microcontainers, which were filled with Bromosphaerol (CuO (BR)), Sea-Nine 211 (CuO (SN)) and 8-Hydroxyquinoline (CeMo (8-HQ)).We created coatings on metals using the basic resins we took from the WILKENS and Re-Turn companies without additives of the companies. The coatings were studied in the laboratory after exposure to marine environment in Mikrolimano harbor in a distance of 12 km southwest from the city of Piraeus in the east coast of the Saronic Gulf (WILKENS) and Singapore harbor (Re-Turn). Laboratory measurements showed that CeMo (8-HQ) coatings exhibit better anticorrosion stability of paints in sea water than commercial paints. With regard to the incorporation of CuO (BR) into commercial paints, the results showed a drastic improvement in antifouling behavior from that resulting from commercial paints. The contact angle with water is improved by Θ = 70° to Θ = 115° possible through morphology of the surface due to the effect of the incorporation of microcontainers ensuring a better cruising behavior of the ship. This entails a dramatic rise in cruising speed, reducing fuel consumption and reducing air pollution. The technology was tested by the partial painting of two ships with our technology, one ship which traveled for a year in the Adriatic Sea (Sea Anemos) and the other traveled over a year in the Nord Sea (Berge Arzew). K E Y W O R D Sbioactivity, corrosion/corrosion resistance, nanoparticles, nanospheres, sol-gel | 2349 KORDAS WILKENS, Re-Turn and FORKYS companies for providing the chemicals. ORCID George Kordashttps://orcid.org/0000-0002-8078-0929

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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CuO (Bromosphaerol) and CeMo (8 Hydroxyquinoline) microcontainers incorporated into commercial marine paints

Κορδάς

2019

J Am Ceram Soc

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“…For example, flagellar motility and extracellular polysaccharides are important for colonization of both solid surfaces and air-liquid interfaces. In many cases, protein polymers such as pili and curli, or extracellular DNA also play a role in surface attachment and/or biofilm development (for reviews see (12)(13)(14)(15)(16)(17)).…”

Section: Introductionmentioning

confidence: 99%

The role ofCaulobactercell surface structures in colonization of the air-liquid interface

Fiebig

2019

Preprint

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In aquatic environments, Caulobacter spp. are often present at the boundary between liquid and air known as the neuston. I report an approach to study temporal features of Caulobacter crescentus colonization and pellicle biofilm development at the air-liquid interface, and have defined the role of cell surface structures in this process. The flagellum enables motile swarmer cells to efficiently reach the oxygenated surface. Here, cells form a monolayer enriched in stalked cells bearing a surface adhesin known as a holdfast. When excised from the liquid surface, this monolayer strongly adheres to glass. The monolayer subsequently develops into a three-dimensional structure that is highly enriched in clusters of stalked cells known as rosettes. As the pellicle film matures, it becomes more cohesive and less adherent to a glass surface. A mutant strain lacking a flagellum does not efficiently reach the surface, and strains lacking type IV pili exhibit defects in organization of the three-dimensional pellicle. Strains unable to synthesize holdfast fail to accumulate at the air-liquid interface and do not form a pellicle. Phase contrast images support a model whereby the holdfast functions to trap C. crescentus cells at the air-liquid boundary. Unlike the holdfast, neither the flagellum nor pili are required for C. crescentus to partition to the air-liquid interface. While it is well established that the holdfast enables adherence to solid surfaces, this study provides evidence that the holdfast has physicochemical properties that enable partitioning of non-motile mother cells to the air-liquid interface, which facilitates colonization of this microenvironment. ImportanceIn aquatic environments the boundary at the air interface is often highly enriched with nutrients and oxygen. The ability of microbial cells to colonize this niche likely confers a significant fitness advantage in many cases. This study provides evidence that the cell surface adhesin known as a holdfast enables Caulobacter crescentus to partition to and colonize the air-liquid interface. Additional surface structures including the flagellum and pili are important determinants of colonization and biofilm formation at this boundary. Considering that holdfast-like adhesins are broadly conserved in Caulobacter spp. and other members of the diverse class Alphaproteobacteria, these surface structures may function broadly to facilitate colonization of air-liquid boundaries in a range of ecological contexts including freshwater, marine, and soil ecosystems.

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