Physical activity and type of diet have been the key factors influencing the development of diabetes (Tuomilehto 2001). Studies conducted recently indicate that one in three Americans born in the year 2000 will suffer from diabetes (Narayan et al., 2003). Biosensors combine the exquisite selectivity of biology with the processing power of modern micro-electronics and opto-electronics to offer new powerful analytical tools with major applications in medicine, environmental diagnostics, and in the food and processing industries.
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