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Veröffentlichung Celebrating 20 years of SETAC German Language Branch (GLB)(2019) Zubrod, Jochen P.; Düring, Rolf-Alexander; Ebke, Klaus P.; Frische, Tobias; Kehrer, AnjaThis editorial presents the objectives and achievements of the German Language Branch of the Society of Environmental Toxicology and Chemistry Europe (SETAC GLB), a regional branch of SETAC Europe, of the last 20 years. SETAC GLB serves Germany, Austria, and Switzerland, by providing an open forum for research related to ecotoxicology and environmental chemistry, to the sustainable management and regulation of natural resources, to education in environmental sciences, as well as to issues related to research and development, and manufacturing of chemicals and products. The editorial serves as an introduction for an article collection published in the journal Environmental Sciences Europe, providing an overview of the current state of ecotoxicology and environmental chemistry in German-speaking countries and of the main developments and key topics within SETAC GLB. The article collection was developed on the occasion of the 20th anniversary of the regional branch of SETAC Europe. Quelle: https://enveurope.springeropen.comVeröffentlichung Validation of a method to determine transformation of chemicals in anaerobic liquid pig and cattle manure for the OECD test guideline programme(2022) Berkner, Silvia; Anke, Julia Margaretha; Düring, Rolf-Alexander; Walter-Rohde, SusanneManure is widely used as a fertilizer and applied to agricultural land. It may contain highly active chemicals like veterinary medicinal products or biocides, which enter into the environment by this pathway. This is recognized by several regulatory frameworks, however, a detailed method for examining the transformation of chemicals in manure was lacking. This article describes the validation of a method for studying the anaerobic transformation of chemicals in pig and cattle liquid manure. Different steps are covered with an emphasis on the validation ring test and the OECD (Organisation for Economic Cooperation and Development) process that led to the recent adoption of the method as OECD Test Guideline (TG) 320. © 2022 The Authors.