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Submission + - Detect any chemical with a personal glucose meter (nature.com)

Freddybear writes: Via MAKE magazine's blog, researchers at the University of Illinois at Urbana have developed a method of using an ordinary glucose meter to selectively detect and quantify a wide range of chemicals. The method involves custom-tailored DNA coupled to the enzyme invertase. When the DNA detects the specific chemical which it is designed to react with, it releases the invertase which converts ordinary table sugar to fructose and glucose, which can be measured by a standard glucose meter.
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Detect any chemical with a personal glucose meter

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... though his invention worked superbly -- his theory was a crock of sewage from beginning to end. -- Vernor Vinge, "The Peace War"