  We extend the application of the adaptive resolution technique (AdResS) to
liquid systems composed of alkane chains of different lengths. The aim of the
study is to develop and test the modifications of AdResS required in order to
handle the change of representation of large molecules. The robustness of the
approach is shown by calculating several relevant structural properties and
comparing them with the results of full atomistic simulations. The extended
scheme represents a robust prototype for the simulation of macromolecular
systems of interest in several fields, from material science to biophysics.
