• PNAS Chemistry Ad
  • Science Sessions: The PNAS Podcast Program
November 11, 2008; 105 (45)

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Cover image expansion

Cover image: Negative charges on the rims of carbon nanotubes exclude ions such as ferricyanide while selectively transporting water at a high rate. The system is a convenient experimental mimic of aquaporin, the biological pore. See the article by Francesco Fornasiero et al. on pages 17250–17255. The special feature on nanomaterials in medicine begins on page 17217. Image courtesy of Scott Dougherty (Lawrence Livermore National Laboratory, Livermore, CA).

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