  The rational parts of 5-gluon one-loop amplitudes are computed by using the
newly developed method for computing the rational parts directly from Feynman
integrals. We found complete agreement with the previously well-known results
of Bern, Dixon and Kosower obtained by using the string theory method.
Intermediate results for some combinations of Feynman diagrams are presented in
order to show the efficiency of the method and the local cancellation between
different contributions.
