2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/142511We present new evolutionary synthesis models for Single Stellar Populations covering a wide range in age and metallicity. The most important difference with existing models is the use of NLTE atmosphere models for the hot stars (O, B, WR, post-AGB stars, and planetary nebulae) that have an important impact in the stellar cluster's ionizing spectra.2 pages, 1 figure, proceedings of the conference Pathways Through an Eclectic Universe, Eds. T.Mahoney, A. Vazdekis & J. Knapen, Tenerife 2007Astrophysicstext