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Date of Publication:2015-01-01

Journal:应用与环境生物学报

Volume:21

Issue:3

Page Number:483-488

ISSN No.:1006-687X

Abstract:With the extensive production and application of single-walled carbon
   nanotubes (SWCNTs), their potential effects on biological systems and
   human health have attracted much research attention. Most researches
   used Escherichia coli as model strain and observed strong antimicrobial
   activity of SWCNTs, rarely paying attention to the effects of SWCNTs on
   functional microorganisms. This research investigated the growth curves
   and degradation curves of a phenoldegrading bacterium Arthrobacter sp.
   W1 influenced by different concentrations of SWCNTs, through scanning
   electron microscopic observation, viability test, cellular integrity
   analysis and reactive oxidative stress analysis. The results showed that
   0.5-5.0 mg/L SWCNTs would accelerate phenol degrading process, and
   1.5-2.0 mg/L SWCNTs had no antibacterial effects on strain W1. SWCNTs
   aggregates would adsorb cells with the toxicity mainly caused by
   physical piercing. While in systems with certain concentrations of
   SWCNTs, the SWCNTs-cells-phenol coexisting systems would create a
   suitable microenvironment for W1 growth and phenol degradation. This
   study would provide theoretical foundation for revealing the microbial
   effects of SWCNTs.

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