Radial Gradients of abundances
  We have computed a set of multiphase chemical evolution models in which the radial mass distribution of each theoretical galaxy is calculated using the Universal Rotation Curve from Persic, Salucci & Steel (1996). We obtain the chemical evolution for galaxies of different masses and morphological types by changing the efficiencies to form molecular clouds and stars according these types.   We obtain the radial distribution of diffuse and molecular gas, the star formation rate, and abundances for 15 elements for each galaxy. 
M. Molla (1), A.I. Diaz (1), F. Ferrini (2) (1)(Universidad Autonoma   de Madrid, Spain) (2)(INTAS, Belgium)