2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/148028The basic concepts and predictions of the `dynamical' GRV parton distributions for hadrons and photons are discussed. Comparisons of these predictions with recent experimental results, especially from HERA, are presented.4 Pages, LateX (qcdparis.sty is used), 6 figures (additional style file uuencoded together with the figures in order to allow for automatical postscript generation, no changes in the paper)High Energy Physics - Phenomenologytext