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Acute Toxicity of the Dissociating Veterinary Antibiotics Trimethoprim to Willow Trees at Varying pH

  • Ondrej Mikes
  • Stefan Trapp
Article

Abstract

The willow tree acute toxicity test was applied to determine the acute toxicity of the neutral and the ionic form of the antibiotic trimethoprim (TMP) to trees. The pKa of the weak base TMP is at 7.2, and the toxicity testing was done at low (pH 4.3), medium (pH 6.4) and high pH (pH 8.15). The test gave toxic effects, i.e. reduced transpiration at an external concentration of 100 mg/L TMP at medium and high pH, where the neutral form of TMP dominates. At an external concentration of 1,000 mg/L, also at low pH an effect occurred, but it was less pronounced than at medium pH.

Keywords

Base Ion Pharmaceuticals Plants 

Notes

Acknowledgements

This work received financial support from the European Union 6th Framework Program of Research, Thematic Priority 6 (Global change and ecosystems), contract number GOCE 037017, project OSIRIS, and the FP 7 project PHARMAS. This study was also supported by the CETOCOEN (project CZ.1.05/2.1.00/01.0001) of the EU Structural Funds, Operational programme “Research and development of Innovations”.

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Copyright information

© Springer Science+Business Media, LLC 2010

Authors and Affiliations

  1. 1.Masaryk University, Faculty of Science, Research Centre for Toxic Compounds in the Environment, RECETOXBrnoCzech Republic
  2. 2.Department of Environmental EngineeringTechnical University of DenmarkKgs. LyngbyDenmark

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