dna chips for detecting genetic variations abound. Typically, a processed biological sample is placed on a chip, which then must be loaded into a separate, expensive device for reading. Now, Yoshiaki Yazawa and colleagues at Hitachi have designed a tiny chip that not only detects DNA variation but can report it wirelessly from the inside of a sealed sample container. These chips could be dropped directly into a solution containing copies of patient DNA and should be cheap enough to be disposable.
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