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  1. Health & Medicine

    Coffee beans, cavity-causing germs

    Compounds in coffee loosen the grip of bacteria that cause tooth decay.

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  2. Tech

    Littlest catalysts get a lot of support

    Tiny metal clusters used as catalysts are getting so small that presumably inert carrier materials that host them are also getting involved in the reactions.

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  3. 18993

    Just a simple question from an avid subscriber. Is the homocysteine in this article the same as the l-cysteine or acetyl-l-cysteine that people take for health reasons in pill form? Paul A. PagnatoMcLean, Va. L-cysteine and acetyl-l-cysteine are quite different from homocysteine. l-cysteine is a detoxifying agent and free radical scavenger that’s the mirror image […]

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  4. Health & Medicine

    High homocysteine tied to Alzheimer’s

    Research has linked the incidence of Alzheimer's disease and other forms of dementia to elevated blood concentrations of the amino acid homocysteine.