A microfluidic device for preparing a mixture, has a mixer. The mixer includes a plurality of chambers, each chamber having a volume of at most 1 microliter, a first plurality of channels, each channel fluidly connecting 2 chambers, a plurality of chamber valves, each chamber valve controlling fluid...http://www.google.es/patents/US7976789?utm_source=gb-gplus-sharePatente US7976789 - Microfluidic device for preparing mixtures
