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  1. Chemistry

    Microbes Make the Switch: Tailored bacteria need caffeine product to survive

    Bacteria that rely on a chemical derived from the breakdown of caffeine for their survival could help lead to the development of decaffeinated coffee plants.

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  2. Plants

    Green Red-Alert: Plant fights invaders with animal-like trick

    Mustard plants' immune systems can react to traces of bacteria with a burst of nitric oxide, much as an animal's immune system does.

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  3. Physics

    Graphite in Flatland: Carbon sheets may rival nanotubes

    Researchers have created freestanding carbon films as thin as one atom.

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  4. Medical Decisions in Question: Mental incapacity missed by docs

    A substantial minority of medical patients treated for acute conditions at a British hospital lacked the ability to make informed decisions about their care, although their physicians usually didn't recognize it.