  Sabeth Verpoorte is professor at the University of Groningen. In this
contribution she describes the development of a microfluidic incubation system
for drug metabolism studies using a "top-down" precision-cut tissue slice
model. She also outlines a fundamental particle separation concept, which
relies on the generation of controlled bi-directional flow in microchannels
having variable cross-sectional dimensions, by opposing pressure-driven and
electrokinetic flows.
