Some inputs on galaxy formation and its observational consequences

We report on the implementation of chemical evolution in cosmological simulations and some of its applications. First, following observers, we classify the (simulated) thin and thick disk components of LTGs in terms of their [alpha/Fe] content, analyze their properties, and briefly discuss the origin of the thin and thick disk of these galaxies. Particular attention has been paid to the comparison to the MW disk Metal Distribution Functions, recently reported by the SDSS-III/APOGEE DR12. Second, chemical implementation allows the study of dust emission in simulated galaxies. We also present an analysis of the IR-submm emission of a sample of simulated dwarf galaxies from the CLUES project, focusing on the surprising diversity of these galaxies, that nicely recover observational data from DGES and HAPLESS samples.