Biofilm Highlights

Leckie, Maggie J.; Jenkins, Gavin R.; Khan, Jamey; Smith, Sunny; Walker, Christoph; Barnes, Peter J.; Hansel, Trevor T.

doi:10.1007/978-3-642-19940-0

Cited by 48 publications

(4 citation statements)

References 352 publications

(522 reference statements)

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“…The Acidovorax lineage was the second most dominant known IOB at Islevbro DWTP (Table 1). Although Leptothrix sequences, a known freshwater iron oxidizer (Szewzyk et al, 2011) were not detected in enrichment clones and sequencing results, E-SEM suggested its presence in after filters of Islevbro DWTP.…”

Section: Resultsmentioning

confidence: 87%

Diversity of Iron Oxidizers in Groundwater-Fed Rapid Sand Filters: Evidence of Fe(II)-Dependent Growth by Curvibacter and Undibacterium spp.

Gülay¹,

Cekic

Musovic

et al. 2018

Front. Microbiol.

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Although earlier circumstantial observations have suggested the presence of iron oxidizing bacteria (IOB) in groundwater-fed rapid sand filters (RSF), ferrous iron (Fe(II)) oxidation in this environment is often considered a chemical process due to the highly oxic and circumneutral pH conditions. The low water temperature (5–10°C), typical of groundwaters, on the other hand, may reduce the rates of chemical Fe(II) oxidation, which may allow IOB to grow and compete with chemical Fe(II) oxidation. Hence, we hypothesized that IOB are active and abundant in groundwater-fed RSFs. Here, we applied a combination of cultivation and molecular approaches to isolate, quantify, and confirm the growth of IOB from groundwater-fed RSFs, operated at different influent Fe(II) concentrations. Isolates related to Undibacterium and Curvibacter were identified as novel IOB lineages. Gallionella spp. were dominant in all waterworks, whereas Ferriphaselus and Undibacterium were dominant at pre-filters of waterworks receiving groundwaters with high (>2 mg/l) Fe(II) concentrations. The high density and diversity of IOB in groundwater-fed RSFs suggest that neutrophilic IOB may not be limited to oxic/anoxic interfaces.

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Section: Resultsmentioning

confidence: 87%

Diversity of Iron Oxidizers in Groundwater-Fed Rapid Sand Filters: Evidence of Fe(II)-Dependent Growth by Curvibacter and Undibacterium spp.

Gülay¹,

Cekic

Musovic

et al. 2018

Front. Microbiol.

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“…Several factors can contribute to persistence of bacteria in the soil environment including pH, nutrients, electron acceptors, osmotic stress, and temperature [14,15]. In addition to soil environment, the characteristics of the indigenous bacteria play a significant role in their existence, for example, some bacteria form biofilms which protects themselves from external stresses [16,17]. Another mechanism for bacteria to survive is to produce spores [18].…”

Section: Microorganisms-related Factorsmentioning

confidence: 99%

Enhancement of Bioremediation and Phytoremediation Using Electrokinetics

Hassan¹,

Mohamedelhassan²,

Yanful³

et al. 2018

Advances in Bioremediation and Phytoremediation

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This chapter discusses the use of bioremediation and phytoremediation coupled with electrokinetics and presents the elements contributing to the success of the remediation process. A deep discussion and an overview of the current advancement in the biotechnologies are outlined in details. Innovative solutions for challenges facing the field application of the new technology are presented and new directions are proposed. A careful review for contaminated site conditions including pH, temperature, and other factors influencing the behavior of microbial community are presented. Great deal of discussion is around overcoming the adverse effect of electrolysis reactions, which is a by-product of electrokinetics. The discussion includes prolonging the survival of the indigenous bacteria, increase of microbial enzyme secretion, improvement of the indigenous bacteria metabolism, and exploration of metagenomics resources from soil biota. The challenges facing the field application of bioremediation and phytoremediation including the delivery of the electron donors and/or acceptors and nutrients to microorganisms involved in the biodegradation, particularly in clay soils, which has very low hydraulic conductivity, is discussed. The use of electrokinetics in biostimulation application to enhanced degradation of organic pollutant is reviewed. The implementation of bioaugmentation in bioremediation coupled with electrokinetics to enhance the outcome of bioremediation is presented.

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“…The amyloids are extremely resistant proteins capable of withstanding physical (thermal), chemical and enzymatic denaturation (Gebbink, et al, 2005;Nielsen et al, 2011). These are extensively seen to be produced by microorganisms like fungi (Blanco et al, 2012), actinomycetes (Hammer, et al, 2008) and bacteria (Dueholm, et al, 2013) The amyloid fibre formation during food processing are considered rare.…”

Section: Nutritional Factors Affecting Amyloid Be-am1 Productionmentioning

confidence: 99%

Analysis of Nutritional Factors Influencing the Biosynthesis of Amyloid Bioemulsifier Be-Am1 Applicable in Food Industry

Markande

Nerurkar

2021

J microb biotech food sci

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Thermostable glycoprotein amyloid bioemulsifier BE-AM1 was reported from Solibacillus silvestris AM1. S. silvestris could produce better BE-AM1 in 1% inoculum size and 18h inoculum age. The BE-AM1 production by S. silvestris AM1 has been seen to be unaffected by amending the production and growth medium (Zobel Marine medium) with Carbon and Nitrogen sources. The effects of 16 nutrient factors (from ZM medium) were analyzed statistically by one factor at a time, Plackett-Burman and Response surface methodologies. Among the nutritive factors, yeast extract and peptone were found to be significant, increasing the production quantity of BE-AM1. The time course of production of BE-AM1 was affected significantly by altering the release of the biomolecule from the surface of the bacterium. This will be the first study to analyse the effect of factors influencing the production of industrially important functional amyloid protein from bacterial source having potential in environmental remediation and microbial interaction.

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Biofilm Highlights

Cited by 48 publications

References 352 publications

Diversity of Iron Oxidizers in Groundwater-Fed Rapid Sand Filters: Evidence of Fe(II)-Dependent Growth by Curvibacter and Undibacterium spp.

Diversity of Iron Oxidizers in Groundwater-Fed Rapid Sand Filters: Evidence of Fe(II)-Dependent Growth by Curvibacter and Undibacterium spp.

Enhancement of Bioremediation and Phytoremediation Using Electrokinetics

Analysis of Nutritional Factors Influencing the Biosynthesis of Amyloid Bioemulsifier Be-Am1 Applicable in Food Industry

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