Figure 5.
EDC-induced hydrazine addition is enhanced at higher gelatin concentration. (a) Moles of hydrazine per mole of gelatin. (b) Cross-linking during the hydrazine addition reaction. Hydrazine at 20× and EDC at 1.25×, gelatin carboxyl groups, reaction at pH 6 for 3 h. Mean ± SD (n = 3).