From 7 to 11 July 2019, the FEMS Microbiology Congress has been held in Glasgow. Dr. Lesley Robertson presented the experiment, in which microscopical images were obtained with the Van Musschenbroek microscope, by a poster; the result of a collaborative project between the Science Center of the Delft University of Technology and the Foundation. The paper of this study has been published in the September issue of FEMS Microbiology Letters (2019, Vol. 366, No. 16).