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UV-Vis absorption spectra of MMC (a) and FU (b) and its mix solutions with HA. (a) MMC or HA 6 × 10−5 mol/L. MMC: HA = 1:9 (1); 2:8 (2); 3:7 (3); 4:6 (4); 5:5 (5); 6:4 (6); 7:3 (7); 8:2 (8); 9:1 (9); 10:0 (10); 0:10 (11). (b) FU or HA = 3 × 10−4 mol/L. HA: FU = 1:9 (1); 2:8 (2); 3:7 (3); 4:6 (4); 5:5 (5); 6:4 (6); 7:3 (7); 8:2 (8); 0:10 (9); 10:0 (10). Solvent: saline buffer.
