Radiative corrections to the structure functions and sum rules in polarized DIS

The one-loop NLO radiative corrections (RC) to the observables in polarized DIS using assumption that a quark is an essential massive particle are con sidered. If compared with classical QCD formulae the obtained results are i dentical for the unpolarized and different for polarized sum rules, that ca n be explained as the influence of the finite quark mass effects on NLO QCD corrections. The explicit expression for one-loop NLO QCD contribution to the structure function g(2) is presented.