2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/204560A QCD analysis of the nuclear parton distributions and structure functions in the NLO is performed by using the world data. By having bounded parton distributions for a nuclear with atomic number A, we can obtain the nuclear structure function in x space. Our results for nuclear structure function ratio $F^A_2 /F^D_2$ for some different values of A, are in good agreement with the experimental data. We compare our results for LO and NLO approximation.4 pages, 2 figures,talk given at 11th International Conference on Meson-Nucleon Physics and the Structure of the Nucleon (MENU2007), September 10-14 (2007), JuelichHigh Energy Physics - Phenomenologytext