  A recently proposed modified perturbative expansion for QCD incorporating
gluon condensation is employed to evaluate the quark and gluon self-energy
corrections in the first approximations. The results predict mass values of 1/3
of the nucleon mass for the light quarks u, d, and s and a monotonously growing
variation with the current mass. The only phenomenological input consists in
that <G^2> is evaluated up to order g^2 as a function of the unique parameter C
defining the modified propagator and then C is fixed to give a current estimate
of <g^2 G^2>. The light quarks u and d result to be confined and the s, c, b
and t ones show damped propagation modes, then suggesting a model for the large
differences in stability between the nucleons and the higher resonances. The
above properties of quark modes diverge from the fully confinement result
following from the similar gluon propagator previously considered by Munczek
and Nemirovski. On another hand, the condensate effects on the gluon
self-energy furnish a tachionic mass shell as predicted by the Fukuda analysis
of gluon condensation in QCD.
