“NICOTINE DEGRADATION: EFFECT OF PROTONATION OF THE PYRROLIDINE NITROGEN ON THE ENERGETICS OF THE REACTION PATHWAY FOR N-DEMETHYLATION” Renata A Kwiecień, Emilie Pihan, Nicolas Galland, Jean-Yves Le Questel, Marcel Delaforge, François André, Piotr Paneth, Richard J Robins, Isotopes 2011, Gréoux-Les-Bains, Francja, 20-24 czerwca 2011