U
Urs Welz-Biermann
Researcher at Merck & Co.
Publications - 77
Citations - 2165
Urs Welz-Biermann is an academic researcher from Merck & Co.. The author has contributed to research in topics: Ionic liquid & Onium. The author has an hindex of 13, co-authored 77 publications receiving 2047 citations. Previous affiliations of Urs Welz-Biermann include University of Göttingen & University of Bremen.
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Journal ArticleDOI
Effects of different head groups and functionalised side chains on the aquatic toxicity of ionic liquids
Stefan Stolte,Jürgen Arning,Ulrike Bottin-Weber,Anja Müller,William-Robert Pitner,Urs Welz-Biermann,Bernd Jastorff,Johannes Ranke +7 more
TL;DR: In this article, the influence of different head groups, functionalised side chains and anions of ionic liquids on the marine bacteria Vibrio fischeri, the limnic green algae Scenedesmus vacuolatus and the fresh water plant Lemna minor was investigated.
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The influence of anion species on the toxicity of 1-alkyl-3-methylimidazolium ionic liquids observed in an (eco)toxicological test battery
Marianne Matzke,Stefan Stolte,Karen Thiele,Tanja Juffernholz,Jürgen Arning,Johannes Ranke,Urs Welz-Biermann,Bernd Jastorff +7 more
TL;DR: In this paper, the anion effect of six different anion moieties and the influence of the side chain length at the cation on (eco)toxicity was investigated. And the results showed that side chain effect was consistent in all used test systems from the molecular up to the organismic level.
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Anion effects on the cytotoxicity of ionic liquids
Stefan Stolte,Jürgen Arning,Ulrike Bottin-Weber,Marianne Matzke,Frauke Stock,Karen Thiele,Marc Uerdingen,Urs Welz-Biermann,Bernd Jastorff,Johannes Ranke +9 more
TL;DR: It is concluded that the model of concentration addition may be useful to estimate the EC50 values of ionic liquids that have not been tested or even synthesised yet, and seems to be the key structural features leading to the observed anion cytotoxicity.
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New ionic liquids with tris(perfluoroalkyl)trifluorophosphate (FAP) anions
TL;DR: In this paper, the synthesis of new ionic liquids with tris(perfluoroalkyl)trifluorophosphate (FAP) anions is described.
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Progress in evaluation of risk potential of ionic liquids—basis for an eco-design of sustainable products
Bernd Jastorff,Kerstin Mölter,Peter Behrend,Ulrike Bottin-Weber,Juliane Filser,Anna Heimers,Bernd Ondruschka,Johannes Ranke,Maike Schaefer,Heike Schröder,Annegret Stark,Piotr Stepnowski,Frauke Stock,Reinhold Störmann,Stefan Stolte,Urs Welz-Biermann,Susanne Ziegert,Jorg Thöming +17 more
TL;DR: In this paper, the authors describe new and updated findings regarding a sustainable product design for ionic liquids, focusing on environmental risk, and illustrate the complex nature of the development processes ionic liquid are currently undergoing and provide guidance on which aspects have to be kept in mind.