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  1. Health & Medicine

    Mixed Results: AIDS vaccine falters in whites, may help blacks

    In its first large test, an AIDS vaccine has failed to shield an at-risk population from acquiring AIDS.

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  2. 19226

    This article on waterproof coats was interesting, but the process used by the Turkish scientists would require evaporating the solvent. Should not possible harmful environmental side effects be considered before a new industrial process is created? Kenneth CrookSan Jose, Calif. I believe this same phenomenon occurs on the leaves of the common perennial lady’s mantle […]

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  3. Materials Science

    Waterproof Coats: Materials repel water with simplicity, style

    Researchers have produced new types of water-repelling surfaces, including one that's colorful and another made of inexpensive plastic.