Monika Heiner monika.heiner@informatik.tu-cottbus.de 0 1 Brandenburg University of Technology at Cottbus Computer Science Institute , Germany Claudine Chaouiya Instituto Gulbenkian de Ci encia , IGC Oeiras , Portugal

This chapter contains the nine peer-reviewed contributions of the First International Workshop on Biological Processes & Petri Nets (BioPPN 2010), held as a satellite event of PETRI NETS 2010, in Braga, Portugal, at June 21, 2010. This workshop has been organised as a communication platform for researchers interested in the application of Petri nets in the broad eld of integrative biology. Integrative biology aims at deciphering essential biological processes that are driven by complex mechanisms, involving miscellaneous interacting molecular compounds. In this context, the need for appropriate mathematical and computational modelling tools is widely advocated. Petri nets have proved their usefulness for the modelling, analysis, and simulation of a diversity of biological networks, covering qualitative, stochastic, continuous and hybrid models. The deployment of Petri nets to study biological applications has not only generated original models, but has also motivated fundamental research.