We investigate how two-particle interactions affect the electronic
transport through several meso- and nanoscopic systems made of
two building blocks: quasi one-dimensional quantum wires of interacting
electrons and quantum dots with local Coulomb correlations.
A recently developed functional renormalization group scheme
is used that includes the essential aspects of Tomonaga-Luttinger
liquid physics (one-dimensional wires) as well as of the physics
of local correlations, with the Kondo effect being an important example.
We describe the appearance of a variety of surprising correlation effects.