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Hans Wesselingh (1937) has worked for Shell on development of large scale equipment and as professor in chemical engineering at the Technical University of Delft, the University of Groningen and the Technical University of Denmark. He has worked on multicomponent mass transfer in in chemical reactors and separation processes and on industrial product development. Hans de Waard (1982) is a post-doctoral researcher at the Department of Pharmaceutical Technology and Biopharmacy (University of Groningen). He has master degrees in pharmaceutical sciences and chemical engineering. Hans finished his PhD research on the development of a novel bottom-up process to prepare drug nano-crystals in 2010.