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Bacterial toxicity comparison between nano- and micro-scaled oxide particles.
Environ Pollut. 2009 May; 157(5):1619-25.EP

Abstract

Toxicity of nano-scaled aluminum, silicon, titanium and zinc oxides to bacteria (Bacillus subtilis, Escherichia coli and Pseudomonas fluorescens) was examined and compared to that of their respective bulk (micro-scaled) counterparts. All nanoparticles but titanium oxide showed higher toxicity (at 20 mg/L) than their bulk counterparts. Toxicity of released metal ions was differentiated from that of the oxide particles. ZnO was the most toxic among the three nanoparticles, causing 100% mortality to the three tested bacteria. Al(2)O(3) nanoparticles had a mortality rate of 57% to B. subtilis, 36% to E. coli, and 70% to P. fluorescens. SiO(2) nanoparticles killed 40% of B. subtilis, 58% of E. coli, and 70% of P. fluorescens. TEM images showed attachment of nanoparticles to the bacteria, suggesting that the toxicity was affected by bacterial attachment. Bacterial responses to nanoparticles were different from their bulk counterparts; hence nanoparticle toxicity mechanisms need to be studied thoroughly.

Authors+Show Affiliations

Department of Plant, Soil and Insect Sciences, University of Massachusetts, Stockbridge Hall, Amherst, MA 01003, USA.No affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

19185963

Citation

Jiang, Wei, et al. "Bacterial Toxicity Comparison Between Nano- and Micro-scaled Oxide Particles." Environmental Pollution (Barking, Essex : 1987), vol. 157, no. 5, 2009, pp. 1619-25.
Jiang W, Mashayekhi H, Xing B. Bacterial toxicity comparison between nano- and micro-scaled oxide particles. Environ Pollut. 2009;157(5):1619-25.
Jiang, W., Mashayekhi, H., & Xing, B. (2009). Bacterial toxicity comparison between nano- and micro-scaled oxide particles. Environmental Pollution (Barking, Essex : 1987), 157(5), 1619-25. https://doi.org/10.1016/j.envpol.2008.12.025
Jiang W, Mashayekhi H, Xing B. Bacterial Toxicity Comparison Between Nano- and Micro-scaled Oxide Particles. Environ Pollut. 2009;157(5):1619-25. PubMed PMID: 19185963.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Bacterial toxicity comparison between nano- and micro-scaled oxide particles. AU - Jiang,Wei, AU - Mashayekhi,Hamid, AU - Xing,Baoshan, Y1 - 2009/01/30/ PY - 2008/9/12/received PY - 2008/12/13/revised PY - 2008/12/18/accepted PY - 2009/2/3/entrez PY - 2009/2/3/pubmed PY - 2009/5/22/medline SP - 1619 EP - 25 JF - Environmental pollution (Barking, Essex : 1987) JO - Environ Pollut VL - 157 IS - 5 N2 - Toxicity of nano-scaled aluminum, silicon, titanium and zinc oxides to bacteria (Bacillus subtilis, Escherichia coli and Pseudomonas fluorescens) was examined and compared to that of their respective bulk (micro-scaled) counterparts. All nanoparticles but titanium oxide showed higher toxicity (at 20 mg/L) than their bulk counterparts. Toxicity of released metal ions was differentiated from that of the oxide particles. ZnO was the most toxic among the three nanoparticles, causing 100% mortality to the three tested bacteria. Al(2)O(3) nanoparticles had a mortality rate of 57% to B. subtilis, 36% to E. coli, and 70% to P. fluorescens. SiO(2) nanoparticles killed 40% of B. subtilis, 58% of E. coli, and 70% of P. fluorescens. TEM images showed attachment of nanoparticles to the bacteria, suggesting that the toxicity was affected by bacterial attachment. Bacterial responses to nanoparticles were different from their bulk counterparts; hence nanoparticle toxicity mechanisms need to be studied thoroughly. SN - 1873-6424 UR - https://www.unboundmedicine.com/medline/citation/19185963/Bacterial_toxicity_comparison_between_nano__and_micro_scaled_oxide_particles_ DB - PRIME DP - Unbound Medicine ER -