\begin{chapter}{Introduction}
  % Reaction Systems (RSs) are a successful computational framework inspired by biological system.
  % The underlying idea is that the interactions between biochemical reactions as well as the functioning of single reactions are based on the mechanisms of facilitation and inhibition.

  % A Reaction System consists of a set of entities and a set of reactions over them. Each reaction produces some set of entities P (called products) if enabled, meaning if a set R (called reactants) is wholly present and if a set I (called inhibitors) of entities is completely absent.
  % The use of inhibitors induces non-monotonic behaviors that are difficult to analyze.
  % This work aims to build software that aids in the study and analysis of certain classes of Reaction Systems.

  % Entities can also be provided by an external context sequence to simulate \textit{in silico} biological experiment.

\end{chapter}
