2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/10238The impact of nuclear physics uncertaintites on the abundances predicted to emerge from the cold CNO, NeNa and MgAl modes of hydrostatic hydrogen burning is discussed in the framework of a simple parametric model. In addition of being able to mimic qualitatively detailed stellar model predictions, these parametric calculations have the virtue of isolating in a crystal-clear way abundance uncertainties of purely nuclear physics origin.13 pages, ps file (gziped + uuencoded), figures included. Review paper presented at the 32nd Liege Int. Astroph. Coll., "Stellar evolution: What Should Be Done?"Astrophysicstext