when grouping was made in double decades , statistical evaluation using the duncan procedure indicates that sialic acid did not show significant differences between groups , whereas the sialyltransferase activity was significantly higher in the group aged 41-60 years as compared to the group aged 20-40 years and the group aged 61-80 years , both at the 0.05 level .
C0220825
evaluation
C0184661
procedure