Biofuel Cells

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Science  17 May 2002:
Vol. 296, Issue 5571, pp. 1223
DOI: 10.1126/science.296.5571.1223

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Researchers are looking to create rice-grain-sized fuel cells that run on chemicals inside our bodies. Such cells, they say, could someday power futuristic implantable sensors that monitor everything from blood glucose levels in diabetics to chemicals that signal the onset of heart disease or cancer.