Microfluidic devices and methods that are useful for performing high-throughput screening assays. In particular, the devices and methods of the invention are useful in screening large numbers of different compounds for their effects on a variety of chemical, and preferably, biochemical systems....http://www.google.de/patents/US5942443?utm_source=gb-gplus-sharePatent US5942443 - High throughput screening assay systems in microscale fluidic devices