Spectral evolution of and radiation energy generation by coeval stellar   populations with different initial composition and chemical enrichment
  The results, obtained with evolutionary synthesis code package, developed by the author, for spectral properties of stellar populations with different initial metallicities Z, are presented and discussed . Also, their contributions to the production of most common nucleosynthesis elements He, C and O were followed. These computations have been performed on the basis of two available but different homogeneous multicomposition stellar evolutionary tracks grids by Geneva and Padova groups and the Kurucz model atmospheres.   Next to the discussion of overall effects and evelutionary differences, caused by chemical composition, we also present and comment the normalized per stellar mass unit standard tables of the detailed radiation energy output from stellar populations, integrated over the whole lifetime of their stars, in function of metallicity, likewise the tables on He, C and O production. They might serve as useful tools for studies of cosmological problems as well as for studies of buildup of heavy elements in the Universe and galactic enrichment. from stellar populations in dependence 
Peeter Traat