This thesis is devoted to the study of reaction-diffusion systems arising in population dynamics,
chemistry and electromigration theory. We investigate global existence issues for strong and
weak solutions, uniqueness, regularity, and study the fast reaction limit for systems from massaction
kinetics chemistry.
In this introduction, we first present the kind of evolution systems we are interested in. Next, we
give the outline of this work and explain how the results will be presented in three different chapters.
Finally, we describe in more detail the main results of each chapter
