Nanoparticles: Zinc Oxide Nanoparticles Induce Cell Filamentation in <i>Escherichia coli</i> (Part. Part. Syst. Charact. 4/2013)

Gunawan, Cindy; Teoh, Wey Yang; ricardo,; Marquis, Christopher; Amal, Rose

doi:10.1002/ppsc.201370014

Cited by 2 publications

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“…This journal is © The Royal Society of Chemistry 2014 to result in complexation-assisted leaching of zinc from ZnO. 34,40 A so Lewis acid, zinc has been known to have high affinity for donor group of the amino acids Cys (-(S À ), pK a ¼ 8.18) and His (À(NH + ), pK a ¼ 6). 41 The majority of the dissolved zinc species in TSB and LB media exist as zinc-peptide complexes.…”

Section: Changes In Morphology and Chemical Composition Of Zno Thin ...mentioning

confidence: 99%

The effect of common bacterial growth media on zinc oxide thin films: identification of reaction products and implications for the toxicology of ZnO

et al. 2014

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This study provides a thorough investigation on the effects of the commonly-employed microbial growth medium, namely the peptide-containing luria-bertani broth, tryptic soy broth, the glucose-containing M9 Minimal Salts Media as well as phosphate-buffered saline solution on the dissolution and microstructural transformation of zinc oxide thin film. Morphology and chemical composition of the ZnO film after incubation in the media was thoroughly characterised. In addition, the amount and rate of soluble zinc released by the ZnO thin films was quantified. Exposure of ZnO thin film in the different growth media saw formation of new zinc compounds, resulting from various chemical reactions of zinc with the medium components. Deposition of the new zinc compounds on top of the thin film caused morphological transformation of the film. Zinc leaching was observed in all of the tested media, with significantly higher extent of dissolution observed in peptide-containing organic media, such as luria bertani and tryptic soy broth. Complex organic components, such as amino acids and peptides form complexes with zinc oxide coatings, resulting in complexation-mediated leaching of zinc. Soluble zinc re-precipitates with components in the media, and therefore substantially reduced the amount of dissolved zinc. The results suggest strong influence of solution chemistry on ZnO speciation in a test medium, which have important implications for the mechanistic interpretation of ZnO toxicity.

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Section: Changes In Morphology and Chemical Composition Of Zno Thin ...mentioning

confidence: 99%

The effect of common bacterial growth media on zinc oxide thin films: identification of reaction products and implications for the toxicology of ZnO

et al. 2014

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“…Surface modification of nanostructures can improve stability, compatibility, and cell-selectivity of nanostructures [9]. Various metal (Ag) and metal oxide (ZnO, CuO, CeO 2 , MgO, Fe 2 O 3 , AgO) nanoparticles have been studied for their antibacterial properties, and the mechanisms behind the antibacterial activity have been investigated [10][11][12][13][14]. Nanoparticles can be incorporated into bacteria by surface or intracellular uptake.…”

Section: Introductionmentioning

confidence: 99%

Antibacterial activity of silver and titania nanoparticles on glass surfaces

Kummala¹,

Brobbey²,

Haapanen³

et al. 2019

Adv. Nat. Sci: Nanosci. Nanotechnol.

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A liquid flame spray (LFS) nanoparticle deposition process was used to generate glass surfaces with silver (Ag) and titania (TiO2) nanoparticles for antibacterial activity against two common pathogenic bacteria causing community-associated and hospital-acquired infections, gram positive Staphylococcus aureus (S. aureus) and gram negative Escherichia coli (E. coli). All nanoparticle coatings increased antibacterial activity compared to a reference glass surface. The silver nanoparticle coatings showed the highest antibacterial activity with E. coli. On contrary, TiO2 nanoparticle coatings were found to have a higher antibacterial activity against S. aureus than E. coli. No significant differences in antibacterial activity were observed between the two used nanoparticle deposition amounts.

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Nanoparticles: Zinc Oxide Nanoparticles Induce Cell Filamentation in Escherichia coli (Part. Part. Syst. Charact. 4/2013)

Cited by 2 publications

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The effect of common bacterial growth media on zinc oxide thin films: identification of reaction products and implications for the toxicology of ZnO

The effect of common bacterial growth media on zinc oxide thin films: identification of reaction products and implications for the toxicology of ZnO

Antibacterial activity of silver and titania nanoparticles on glass surfaces

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