  Identified $b\overline{b}g$ and $q\overline{q}\gamma$ events from DELPHI are
used to measure the ratio of the mean charged particle multiplicity
distribution between gluon and quark jets. The dependence of this ratio with
the jet energy is established using about three million Z$^0$ decays. Results
from all other detectors are discussed and compared. A nice agreement is found
among all them. The ratio between the normalized total three-jet cross sections
of $b\overline{b}g$ and $q\overline{q}g, q \equiv u,d,s$ events is also
determined. The preliminary value obtained indicates that $b$ quarks are
experimentaly seen to radiate less than light quarks due to their higher mass.
The suggested experimental error is $\sim$300 MeV for the $b$ mass
determination at the M$_Z$ scale.
