Fig. 8

HPLC chromatogram of the glucosamine derivatives and XTT�@reducibility of the fractionated eluate (�œ absorbance at 492nm).Glucosamine (0.5 M) in a 50 mM sodium phosphate buffer (pH7.4) containing 5 ƒÊM DTPA was incubated at 37�Ž for 4 h. The XTT reducibility was measured after the eluate had been fractionated from 3.00 to 10.00 min at intervals of 5 s.