2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/182590Gluonic degrees of freedom play an important role in the masses of the eta and etaprime mesons. We discuss eta- and etaprime-nucleon and nucleus interactions where this glue may be manifest. Interesting processes being studied in experiments are etaprime production in proton-nucleon collisions close to threshold and possible eta-nucleus bound-states.6 pages, invited talk at ETA05, Cracow 2005High Energy Physics - Phenomenologytext