We calculate the yields of a variety of hadrons for RHIC and LHC energies a
ssuming thermodynamical equilibration of the minijets produced, and using a
s input results from pQCD for the energy densities at midrapidity. In the c
alculation of the production of partons and of transverse energy one has to
account for nuclear shadowing. By using two parametrizations for the gluon
shadowing one derives energy densities differing strongly in magnitude. We
link those perturbatively calculated energy densities of partons via entro
py conservation in an ideal fluid to the hadron multiplicities at chemical
freeze-out.