Please use this identifier to cite or link to this item:
Title: Toxicity and genotoxicity of organic and inorganic nanoparticles to the bacteria Vibrio fischeri and Salmonella typhimurium
Author: Lopes, I.
Ribeiro, R.
Antunes, F. E.
Rocha-Santos, T. A. P.
Rasteiro, M. G.
Soares, A. M. V. M.
Gonçalves, F.
Pereira, R.
Keywords: Microtox test
Ames test
Zeta potential
Issue Date: Apr-2012
Publisher: Springer
Abstract: The present work aimed at evaluating the toxicity and genotoxicity of two organic (vesicles composed of sodium dodecyl sulphate/didodecyl dimethylammonium bromide-SDS/DDAB and of monoolein and sodium oelate-Mo/NaO) and four inorganic (titanium oxide-TiO₂, silicon titanium-TiSiO₄, Lumidot-CdSe/ZnS, and gold nanorods) nanoparticles (NP), suspended in two aqueous media (Milli Q water and American Society for Testing and Materials (ASTM) hardwater), to the bacteria Vibrio fischeri (Microtox test) and Salmonella typhimurium-his⁻ (Ames test with strains TA98 and TA100). Aiming a better understanding of these biological responses physical and chemical characterization of the studied NP suspensions was carried out. Results denoted a high aggregation state of the NP in the aqueous suspensions, with the exception of SDS/DDAB and Mo/NaO vesicles, and of nanogold suspended in Milli Q water. This higher aggregation was consistent with the low values of zeta potential, revealing the instability of the suspensions. Regarding toxicity data, except for nano TiO₂, the tested NP significantly inhibited bioluminescence of V. fischeri. Genotoxic effects were only induced by SDS/DDAB and TiO₂ for the strain TA98. A wide range of toxicity responses was observed for the six tested NP, differing by more than 5 orders of magnitude, and suggesting different modes of action of the tested NP.
Peer review: yes
DOI: 10.1007/s10646-011-0808-9
ISSN: 0963-9292
Appears in Collections:CESAM - Artigos
DBio - Artigos
DQ - Artigos

Files in This Item:
File Description SizeFormat 
Lopes et al. - 2012 - Toxicity and genotoxicity of organic and inorganic.pdf342.9 kBAdobe PDFrestrictedAccess

Formato BibTex MendeleyEndnote Degois 

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.