| http://www.w3.org/ns/prov#value | - Fluid flow (and flow of materials suspended or solubilized within the fluid, including cells or other particles) is optionally regulated by pressure based mechanisms such as those based upon fluid displacement, e.g., using a piston, pressure diaphragm, vacuum pump, probe, or the like, to displace liquid and thereby raise or lower the pressure at a site in the microfluidic system.
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