Consideration of some implications of the resistance of biofilms to biocides

Morton, L.H.G.; Greenway, D. L. A.; Gaylarde, Christine C.; Surman, Susanne

doi:10.1016/s0964-8305(98)00026-2

Cited by 125 publications

(81 citation statements)

References 116 publications

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“…The extent of microbial colonization appears to increase as the surface roughness increases. This is because shear forces are diminished, and total surface area is higher on rougher surfaces (Morton et al, 1998;Donlan, 2002). Tomaselli et al (2000a) showed that high stone porosity and rough surface, together with environmental factors, played a greater role than mineral composition in promoting microbial establishment.…”

Section: Survival Strategies Of Cyanobacteria and Algae On Stonementioning

confidence: 99%

Biodiversity of cyanobacteria and green algae on monuments in the Mediterranean Basin: an overview

Macedo

Miller

Dionísio³

et al. 2009

Microbiology

235

130

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The presence and deteriorating action of micro-organisms on monuments and stone works of art have received considerable attention in the last few years. Knowledge of the microbial populations living on stone materials is the starting point for successful conservation treatment and control. This paper reviews the literature on cyanobacteria and chlorophyta that cause deterioration of stone cultural heritage (outdoor monuments and stone works of art) in European countries of the Mediterranean Basin. Some 45 case studies from 32 scientific papers published between 1976 and 2009 were analysed. Six lithotypes were considered: marble, limestone, travertine, dolomite, sandstone and granite. A wide range of stone monuments in the Mediterranean Basin support considerable colonization of cyanobacteria and chlorophyta, showing notable biodiversity. About 172 taxa have been described by different authors, including 37 genera of cyanobacteria and 48 genera of chlorophyta. The most widespread and commonly reported taxa on the stone cultural heritage in the Mediterranean Basin are, among cyanobacteria, Gloeocapsa, Phormidium and Chroococcus and, among chlorophyta, Chlorella, Stichococcus and Chlorococcum. The results suggest that cyanobacteria and chlorophyta colonize a wide variety of substrata and that this is related primarily to the physical characteristics of the stone surface, microclimate and environmental conditions and secondarily to the lithotype. IntroductionStone monuments, statues and historic buildings are exposed to the effects of physical, chemical and biological deteriorating factors. This review will focus on the damage caused by micro-organisms, in a process referred to as biodeterioration. Stone works of art can be colonized by different groups of micro-organisms, including bacteria, cyanobacteria, algae and fungi. Microbial populations present in a stone substratum are usually the result of successive colonization by different micro-organisms that has taken place over several years. It is a process that relies upon the capacity of a substratum to provide a protective niche on which micro-organisms can develop. According to several authors, cyanobacteria and chlorophyta (green algae) are considered the pioneering inhabitants in the colonization of stone (Ortega-Calvo et al., 1991;Tiano et al., 1995; Cecchi et al., 2000;Lamenti et al., 2000;Tomaselli et al., 2000b;Crispim & Gaylarde, 2005). Due to their photoautotrophic nature, these micro-organisms develop easily on stone surfaces, giving rise to coloured patinas and incrustations ( Fig. 1) (Tomaselli et al., 2000b). Identifying the micro-organisms involved in biodeterioration is one of the most important steps in the study of the microbial ecology of monumental stones. It can help us to understand the microbial biodiversity, the phases of colonization and the relationship among populations on the surfaces and between micro-organisms and substrata.Here we review the occurrence of cyanobacteria and green algae identified on stone monuments, statues and histo...

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Section: Survival Strategies Of Cyanobacteria and Algae On Stonementioning

confidence: 99%

Biodiversity of cyanobacteria and green algae on monuments in the Mediterranean Basin: an overview

Macedo

Miller

Dionísio³

et al. 2009

Microbiology

235

130

View full text Add to dashboard Cite

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“…These organisms can coexist in naturally occurring biofilms, often forming synergistic communities (consortia) that are able to affect electrochemical processes through co-operative metabolism not seen in the individual species (34). Much recent research activity has centered on the role of quorum sensing molecules, such as acylhomoserine lactones, in control of microbial activities in biofilms (29,83), with the aim of using this knowledge to reduce problematical biofilm formation in industry (115).…”

Section: Activities Of Microorganisms As the Driving Force For Biocormentioning

confidence: 99%

“…Mössbauer spectroscopy can be applied to iron-containing compounds. It has been used to detect green rust 2 among corrosion products of steel exposed to marine sediments containing SRB (88) and subsequent, controlled laboratory studies showed that this corrosion product was exclusively associated with SRB-induced corrosion (83).…”

Section: Qualitative and Semi-quantitative Evaluation Of Micmentioning

confidence: 99%

Recent advances in the study of biocorrosion: an overview

1999

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Biocorrosion processes at metal surfaces are associated with microorganisms, or the products of their metabolic activities including enzymes, exopolymers, organic and inorganic acids, as well as volatile compounds such as ammonia or hydrogen sulfide. These can affect cathodic and/or anodic reactions, thus altering electrochemistry at the biofilm/metal interface. Various mechanisms of biocorrosion, reflecting the variety of physiological activities carried out by different types of microorganisms, are identified and recent insights into these mechanisms reviewed. Many modern investigations have centered on the microbially-influenced corrosion of ferrous and copper alloys and particular microorganisms of interest have been the sulfate-reducing bacteria and metal (especially manganese)-depositing bacteria. The importance of microbial consortia and the role of extracellular polymeric substances in biocorrosion are emphasized. The contribution to the study of biocorrosion of modern analytical techniques, such as atomic force microscopy, Auger electron, X-ray photoelectron and Mössbauer spectroscopy, attenuated total reflectance Fourier transform infrared spectroscopy and microsensors, is discussed.

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“…Biofilms are close to omnipresent in benthic aquatic systems and important in many scientific disciplines including medical research (Guo et al 2008, Jain et al 2007, Morton et al 1998, wastewater treatment Fang 2003, Raszka et al 2006), toxicant removal (Sheng et al 2008), and biotechnology (Flemming andWingender 2001, Sutherland et al 1998). Considerable interest has focused on the importance of biofilms for increasing sediment stability through the mechanical effects of the microbially produced matrix of extracellular polymeric substances (EPS, reviewed in Stal 2003, Underwood andPaterson 2003).…”

Section: Introductionmentioning

confidence: 99%

Surface adhesion measurements in aquatic biofilms using magnetic particle induction: MagPI

Larson¹,

Lubarsky²,

Gerbersdorf³

et al. 2009

Limnology & Ocean Methods

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Natural sediment stability is a product of interacting physical and biological factors, and whereas stability can be measured, few techniques allow sensitive assessment of the sediment surface as conditions change. For example, stability gradually increases as a biofilm develops or as salinity rises, or it might be influenced by toxic compounds. This article introduces a new technique (magnetic particle induction: MagPI) based on the magnetic attraction of specially produced fluorescent ferrous particles. The test particles are added to a surface and subjected to an incrementally increasing magnetic field produced by permanent magnets or electromagnets. There is a strong correlation between magnetic flux density (mTesla) and distance from the surface (r 2 = 0.99) for permanent magnets and between magnetic flux density and the current supplied to an electromagnet (r 2 > 0.95). The magnetic force at which the particles are recaptured is determined as a measure of surface adhesion. MagPI therefore determines the "stickiness" of the surface, whether a biofilm, sediment, or other material. The average magnetic flux density required to remove test particles from diatom biofilms (15.5 mTesla) was significantly greater than from cyanobacterial biofilms (10 mTesla). Controls of fine glass beads showed little adhesion (2.2 mTesla). Surface adhesion is an important bed property reflecting the sediment system's potential to capture and retain new particles and accumulate material. MagPI offers a straightforward and economic way to determine the surface adhesion of a variety of surfaces rapidly and with precision. The technique may have applications in physical, environmental, and biomedical research.

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Consideration of some implications of the resistance of biofilms to biocides

Cited by 125 publications

References 116 publications

Biodiversity of cyanobacteria and green algae on monuments in the Mediterranean Basin: an overview

Biodiversity of cyanobacteria and green algae on monuments in the Mediterranean Basin: an overview

Recent advances in the study of biocorrosion: an overview

Surface adhesion measurements in aquatic biofilms using magnetic particle induction: MagPI

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