Fig. 4From: Gellan residues on paper: quantification and implication for paper conservationRhamnose concentrations in the three sample papers before and after poultice application of gellan gel according to methanolysis (duplicate analyses). The brackets are the p-values obtained with a one-sided t-test, which evaluates the probability of equality between untreated and treated samples; the smaller the number, the more certain the presence of gellan residuesBack to article page