Fig. 4From: Metabolic fingerprinting of Lactobacillus paracasei: the optimal quenching strategyThe normalized abundance of alanine, glutamic acid, lactic acid and tartaric acid as function of increasing concentrations of glycerol for both alkylation and silylation (n = 5). The data is normalized to the signal intensity obtained with 0 mM of glycerol. A value of 1 indicates that derivatization of the metabolite is unaffected by the increasing concentrations of glycerolBack to article page