Fig. 5

B3LYP/6-31G(d, p) calculated TDOS plots of a) glycine and glycine interacted with hydrated ZnO, MgO, and CaO through: b), d), and f) NH2 functional group and c), e), and g) COOH functional group.
B3LYP/6-31G(d, p) calculated TDOS plots of a) glycine and glycine interacted with hydrated ZnO, MgO, and CaO through: b), d), and f) NH2 functional group and c), e), and g) COOH functional group.