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Stresses exerted by ZnO, CeO2 and anatase TiO2 nanoparticles on the Nitrosomonas europaea by Xiaohua Fang; Ran Yu; Bingquan Li; Ponisseril Somasundaran; Kartik Chandran is a Chemistry article available to read on EtoBox.

What is Stresses exerted by ZnO, CeO2 and anatase TiO2 nanoparticles on the Nitrosomonas europaea about?

Recent studies have shown that nano-bio interfaces are the most complex and the least understood. Notably, nanotoxicity of these nanoparticles is not even well recognized. In this work, we examined the toxic effects of different nanoparticles on bacteria cells (Nitrosomonas europaea). The four nanoparticles involved are: 25 nm anatase TiO(2), 200 nm anatase TiO(2), ZnO and CeO(2) particles. These particles will have different electrical charges in the cell cultivating media. It has been observed that even with only 4 h of dosing, all of the particles caused apparent morphological damage to the cells. Experimental results suggest that ZnO particles exert the stress on cells by its dissolution and releasing of Zn(2+) ions. The TEM and AUC (analytical ultracentrifuge) result suggest that cells become heavier in presence of CeO(2) and TiO(2) particles. No visible clear intrusions of bulk nanoparticles were observed. However, both the analytical ultracentrifuge and TEM results show that cells are heavier when being damaged.

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Author

Xiaohua Fang; Ran Yu; Bingquan Li; Ponisseril Somasundaran; Kartik Chandran

Publisher

Elsevier Science; Elsevier ; Elsevier Inc.; Elsevier BV (ISSN 0021-9797)

Published

2010

Language

EN

Field

Chemistry (Physical Sciences)