Tuyển tập các báo cáo nghiên cứu về hóa học được đăng trên tạp chí hóa hoc quốc tế đề tài : Laudation to Prof. Dr. Hans-Toni Ratte–towards conceptual, theory-based ecological science and its transfer to the applied field of ecotoxicology | Brock et al. Environmental Sciences Europe 2011 23 34 http content 23 1 34 o Environmental Sciences Europe a SpringerOpen Journal EDITORIAL Open Access Laudation to Prof. Dr. Hans-Toni Ratte-towards conceptual theory-based ecological science and its transfer to the applied field of ecotoxicology Tbciri Rrr tr lz1 D L icic 2 Rrcir l l-laimtarh3 HiantìQr I lr Jlorf 4M2rfin2 Rr tR-Mif Izr JI4 Qt H ffor4 fiiH IIIcU Brock Join P Giesy Fred HeimbacH ncllllcl Hollert Martina nUlj Nickoll Andreas sClldllel and Klaus Gunther SteinHduser5 Abstract In order to tHank Prof. Dr. Hans-Toni Rdtte OH tHe occasion of His retirement for His outstanding experimental and modelling merits in tHe field of ecotoxicology and ecology and His personal 65tH anniversary on November 25tH tHis article will present a laudation. Keywords ecology ecotoxicity modelling Laudation Theo . Brock Dr. Theo C. M. Brock Alterra Wageningen University and Research Centre . Box 47 6700 AA Wageningen The Netherlands Prof. Dr. Hans Toni Ratte A pioneer in mechanistic effect modelling and an excellent lecturer. More than 20 years ago Drs. Hans Toni Ratte and Peter Leeu-wangh organized a German-Dutch meeting in Ecotoxicology that took place at RWTH Aachen University. As a junior scientist with a PhD degree in Aquatic Ecology and hardly no international network in the field of environmental risk assessment I was honoured with the invitation to present my post-doc research on the ecological impact of the insecticide chlorpyrifos in indoor freshwater microcosms. I considered this meeting as a milestone of my beginning career as aquatic ecotoxicologist. At this German-Dutch meeting representatives of different stakeholder groups academia regulators industry consultants were present many involved with the environmental risk assessment of pesticides. Here I realized the importance of applied environmental research and its direct use in decision making. Here I also met for the first time Hans Toni