  The ALICE Transition Radiation Detector (TRD) significantly enlarges the
scope of physics observables studied in ALICE, because it allows due to its
electron identification capability to measure open heavy-flavour production and
quarkonium states, which are essential probes to characterize the
Quark-Gluon-Plasma created in nucleus-nucleus collisions at LHC. In addition
the TRD enables to enhance rare probes due to its trigger contributions. We
report on the first results of the electron identification capability of the
ALICE Transition Radiation Detector (TRD) in pp collisions at $\sqrt{s}$ = 7
TeV using a one-dimensional likelihood method on integrated charge measured in
each TRD chamber. The analysis of heavy flavour production in pp collisions at
$\sqrt{s}$ = 7 TeV with this particle identification method, which extends the
$p_{t}$ range of the existing measurement from $p_{t}$ = 4 GeV/c to 10 GeV/c
and reduces the systematic uncertainty due to particle identification, is
presented. The performance of the application of the TRD electron
identification in the context of J/\psi measurements in Pb-Pb collisions is
also shown.
