2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/15462We present a summary of the main sites for nucleosynthesis in intermediate mass Asymptotic Giant Branch (AGB) stars. We then discuss some detailed evolutionary models and how these have been used to create a synthetic evolution code which calculates the nucleosynthesis very rapidly, enabling us to investigate changes in some uncertain parameters in AGB evolution, such as mass-loss and dredge-up. We then present results for C, C/O, Mg and Al. We also discuss the changes due to the recent NACRE compilation of reaction rates.8 pages, including figures. Paper presented at Workshop on "The Changes in Abundances in Asymptotic Giant Branch Stars", Rome, Sept 16-18, 1999Astrophysicstext