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Turbidity curves for titrations of solutions of chitosans with different molecular weights with (a) CNC-18 suspensions and (b) CNC-33 suspensions. (The dashed lines are merely visual guides. Each data point is a mean of three measurements. The error bars correspond to ± one standard deviation.) The inset shows the averaged data for CNC-18 and CNC-33. S/N ratio = number of CNC sulfate groups divided by number of chitosan amino groups, 100 − Transmittance of deionized water = 0%.
