title: W.A. Arnold's inspiring experiments.
abstract: The impact is discussed here of some experiments by W.A. Aronld and coworkers on photosynthetic research, specifically on that at the Leiden Biophysics Department. These experiments involved the following topics: photosynthetic unit and electronic excitation transfer to a reaction center, chlorophyll luminescence and photosynthesis, and unexpected experimental results as a source of discoveries.
authors.affiliation: Department of Biophysics, Huygens Laboratory of the State University, P.O. Box 9504, 2300 RA, Leiden, The Netherlands.
authors.forename: L N
authors.initials: LN
authors.lastname: Duysens