Catálogo de publicaciones - revistas

<jats:p>The final guidelines on research with human embryonic stem cells issued on Monday by the National Institutes of Health set out criteria for determining which ES cell lines can be used in federally funded experiments and give NIH discretion to approve old lines that don't meet stringent modern ethical requirements.</jats:p>

<jats:p>Three surveys conducted this spring by the Pew Research Center offer some fresh insights into what both the U.S. public and scientists think about science and its impact on society.</jats:p>

<jats:p> Highlights from <jats:italic>Science</jats:italic> 's online daily news site, <jats:italic>Science</jats:italic> NOW, this week include a way to guess a person's Social Security number, a fossil that may replace Ida as the "missing link," an average black hole, and a fossil that shows how the piranha got its teeth. </jats:p>

<jats:p> Biochemist Robert Tjian, 59, took the helm of the Howard Hughes Medical Institute in April at a challenging time, after its endowment, which had stood at $17.5 billion last August, had been battered by the economic recession. On 25 June, Tjian spoke with <jats:italic>Science</jats:italic> ; his comments have been edited for brevity and clarity. </jats:p>

<jats:p>A prominent member of the science advisory board for Autism Speaks, the largest private funder of autism research, resigned last week citing his disagreement with efforts to study vaccines as a possible cause of autism.</jats:p>

<jats:p> <jats:italic>Science</jats:italic> Insider this week reported on a third case of oseltamivir-resistant swine flu, "systemic work-force management problems" at the National Science Foundation, and a $50 million plan to bolster research capacity in Africa, among other stories. </jats:p>

<jats:p>To reconstruct our ancestors, paleoartists weave art and science together in a sometimes uneasy marriage. The result is lifelike models that influence how both researchers and the public view ancient humans.</jats:p>

<jats:p> Judging from the successful few whose work shapes our ideas of ancient humans ( <jats:ext-link xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="uri" xlink:href="http://www.sciencemag.org/cgi/content/short/325/5937/136">see main text</jats:ext-link> ), there's no standard career path, but hefty doses of both artistic talent and scientific knowledge are essential to become a paleoartist. </jats:p>

<jats:p>If the novel H1N1 virus behaves like its ancestors, humans may have a rough road ahead, especially if it takes hold on hog farms.</jats:p>

<jats:p>Geneticists used to think that important DNA sequences always reject mutations. Now they are not so sure what sequence conservation really means.</jats:p>