  We studied the chemical enrichment of the interstellar medium and stellar
population of the building blocks of current typical galaxies in the field, in
cosmological hydrodynamics simulations. The simulations include detail modeling
of chemical enrichment by SNIa and SNII. In our simulations the metal missing
problem is caused by chemical elements being locked upon in the central regions
(or bulges) mainly, in stars.
  Supernova energy feedback could help to reduce this concentration by
expelling metals to the intergalactic medium.
