Metal fixation by bacterial cell walls

Beveridge, Terry J.; Fyfe, W. S.

doi:10.1139/e85-204

Cited by 320 publications

(165 citation statements)

References 19 publications

Supporting

Mentioning

161

Contrasting

Unclassified

Order By: Relevance

“…Other authors (Beveridge and Fyfe, 1985;Ferris et al, 1991) state that the molecular components of the bacterial envelope can bind a signi®cant amount of soluble metal cations. Rivadeneyra et al (1996Rivadeneyra et al ( , 1998 suggest that the process of carbonate crystals formation by Deleya halophila and Halomonas eurihalina involves the adsorption of Ca 2 and Mg 2 and the production of CO 2 and ammonium ions during the metabolization of the nitrogenated organic materials.…”

Section: Resultsmentioning

confidence: 99%

Precipitation of carbonates by Nesterenkonia halobia in liquid media

et al. 2000

View full text Add to dashboard Cite

We investigated the precipitation of carbonates by Nesterenkonia halobia in a liquid medium at di erent concentrations of salts and incubation times. N. halobia only produced crystals at salt concentrations of 2.5%, 7.5% and 15%. At 20% salt concentration no crystal formation was observed. Calcite, aragonite and dolomite were precipitated in di erent quantities, depending on the salinity of the medium and incubation time. Scanning and transmission electron microscopy, microanalysis and electron di raction were all used to study in detail the morphology, composition and internal structure of the bioliths. We propose a mechanism for biolith formation involving both biological and inorganic processes. Ó

show abstract

Section: Resultsmentioning

confidence: 99%

Precipitation of carbonates by Nesterenkonia halobia in liquid media

et al. 2000

View full text Add to dashboard Cite

show abstract

“…The cell wall acts as a barrier against Pb ions. Especially in Gram-positive bacteria, Pb will bind to the peptidoglycan layer as well as the teichoic and teichuronic acids found on the cell wall [51]. Furthermore, bacteria may also produce extracellular polymers such as exopolysaccharide to which Pb will bind, therefore protecting the whole cell from heavy metal contamination [52].…”

Section: Resultsmentioning

confidence: 99%

Bioremediation of heavy metals from aquatic environment through microbial processes: A potential role for probiotics?

2017

J App Biol Biotech

View full text Add to dashboard Cite

Heavy metals can cause disastrous effects on any living organisms. Probiotics have the ability to reduce metal toxicity. Bioremediation of polluted waters using these bacteria could be an alternative to conventional remediation methods. The aim of this study was to isolate and characterize heavy metal resistant probiotics. Soil samples were collected for the isolation of probiotics. Morphological, biochemical, and molecular characterization was performed for the isolates. In addition, a preliminary heavy metal minimum inhibitory concentration test was done followed by atomic absorption spectrometry (AAS) analysis analysis. Four Enterococci (BT1, BT2, MC1, and MC2) and Bacillus acidiproducens (SM1 and SM2) were isolated. Moreover, all the isolates demonstrated probiotic characteristics. BT1 and BT2 were able to tolerate mercury (Hg), cadmium (Cd), lead (Pb), and chromium (Cr) but they demonstrated poor Hg removal abilities (0.75-1.42%). MC1 and MC2 isolates could grow in medium supplemented with Cd, Pb, and Cr, respectively. MC1 showed the highest level of Pb removal (43.00% ± 0.776%) and Cd removal (46.19% ± 7.651%) from broth media. Yet, SM1 and SM2 isolates tolerated only Pb and Cr. SM2 had the ability to remove the highest amount of Cr (43.06% ± 7.991%). These reasonable heavy metal removal abilities could be further studied for efficient use in bioremediation.

show abstract

“…This is due to the fact that more Ag-NPs accumulate over cell walls of Gram positive bacteria of metals than that of Gram negative bacteria 46 . Another factor that plays a major bactericidal role is the size of Ag-NPs where small size Ag-NPs is more effective than larger one.…”

Section: Discussionmentioning

confidence: 99%

Silver Nanoweapons: A novel Tool against Multidrug Resistant Bacteria

Arafat¹,

El-Sayed²,

Askora³

2016

Biosci., Biotech. Res. Asia

View full text Add to dashboard Cite

Antibacterial activities of Ag-NPs have received much attention due to their effective killing and cost-effectiveness. Biosynthesis is an attractive and eco-friendly method to produce silver nanoparticles (Ag-NPs). Ag-NPs are considered a promising tool to overcome the emergence of multi-drug resistant bacteria. In this study, bio-synthesis of Ag-NPs was attempted using plant extracts of peppermint. Characterization of Ag-NPs was achieved by UV-visible spectrophotometer and TEM. Monodispersed Ag-NPs were obtained with different sizes ranged from 6 to 88 nm. Antibacterial activities of Ag-NPs against pathogenic bacteria were evaluated using disc diffusion method. Our results indicated that Gram positive bacteria were more susceptible than Gram negative. The current study offers a cost-effective and eco-friendly method for biosynthesis of potent bactericidal Ag-NPs and their use against human pathogenic bacteria.

show abstract

Metal fixation by bacterial cell walls

Cited by 320 publications

References 19 publications

Precipitation of carbonates by Nesterenkonia halobia in liquid media

Precipitation of carbonates by Nesterenkonia halobia in liquid media

Bioremediation of heavy metals from aquatic environment through microbial processes: A potential role for probiotics?

Silver Nanoweapons: A novel Tool against Multidrug Resistant Bacteria

Contact Info

Product

Resources

About