The aim of this paper is to give a set of central elements of the algebras
U'(q)(so(m)) and U-q(iso(m)) when q is a root of unity. They are suprisingl
y arise from a single polynomial Casimir element of the algebra U'(q)(so(3)
). It is conjectured that the Casimir elements of these algebras under any
values of q (not only for q a root of unity) and the central elements for q
a root of unity derived in this paper generate the centers of U'(q)(so(m))
and U-q(iso(m)) when q is a root of unity.