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Similarly, among current tobacco smokers, e-cigarette smokers, and controls, it was evidenced that urinary excretion of biomarkers of exposure in individuals who ceased regular and electronic cigarette smoking decreased by 6698%, including NNAL (4-(methylnitrosamino)-1-(3-pyridyl)-1-butanol), carboxyhemoglobin, nicotine, and its metabolites (52) (Table 3)

On entend par base de schiff , un groupement fonctionnel qui contient une double liaison C=N de formule gnrale R X1 R X2 -C=N-R X3 , avec R xl , R x2 et R x3 sont tels que dfinis prcdemment.The term "Schiff base", a functional group which contains a double bond C = N of the general formula R R X1 X2 X3 -C = NR, with R xl, x2 R x3 and R are as defined above