Insignificant acute toxicity of TiO2 nanoparticles to willow trees Seeger, Eva Mareike ; Baun, Anders ; Kästner, Matthias ; Trapp, Stefan Abstract Publication: Journal of Soils and Sediments Pub Date: February 2009 DOI: 10.1007/s11368-008-0034-0 Bibcode: 2009JSoSe...9...46S