Saturday, 27 February 2016

New Trigger For Self-Powered Mechanical Movement


This animation illustrates an enzyme pump pushing particles away, then drawing them in. It shows a top-down view of the simulated fluidic chamber containing an enzyme pump (represented by a yellow circle in the center). The pump causes a fluid flow that carries small, green particles, which are located near the bottom surface of the chamber. The direction of flow near the bottom of the chamber (indicated by arrows) changes over time. Initially, the flow pushes particles away from the pump (in the blue region). Later, the flow direction reverses and draws particles toward the pump (in the red region). Source: University of PittsburghA new way to use the chemical reactions of certain enzymes to trigger self-powered mechanical movement has been developed by a team of researchers at Penn State University and the University of Pittsburgh. A paper describing the team’s research, titled “Convective flow reversal in self-powered enzyme micropumps,” is published this week in the journal Proceedings of the National Academy of Sciences.


“These pumps provide precise control over flow rate without the aid of an external power source and are capable of turning…



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New Trigger For Self-Powered Mechanical Movement
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