Cover illustration
November 9, 2004; 101 (45)
Cover image: Microfluidic channels filled with green dye and superimposed on a grid of pins from a dynamically refreshable Braille display. Scale indicated by U.S. quarter dollar coin. These pins can be computer-controlled to push against channel sections enclosed by silicone rubber to function as integrated pumps and valves for the perfusion of miniaturized cell cultures (gray cells above channels). See the article by Gu et al. on pages 15861–15866. Photograph courtesy of Wei Gu.
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