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Institución detectada Período Navegá Descargá Solicitá
No detectada desde mar. 1997 / hasta dic. 2023 Science Journals

Información

Tipo de recurso:

revistas

ISSN impreso

0036-8075

ISSN electrónico

1095-9203

Editor responsable

American Association for the Advancement of Science (AAAS)

País de edición

Estados Unidos

Fecha de publicación

Cobertura temática

Tabla de contenidos

Panel Approves Gene Trial for ‘Normals’

Eliot Marshall

<jats:p>The panel that for more than a decade has vetted safety and ethical issues in U.S. human gene-therapy research—the Recombinant DNA Advisory Committee (RAC) of the National Institutes of Health (NIH)—ended its role as gatekeeper with a bang last week, grilling a researcher who had proposed a clinical trial that would inject engineered genes for the first time into normal, healthy volunteers. RAC's final act as enforcer also gave a preview of how it might handle the new role that NIH director Harold Varmus has envisioned for the committee—as a forum for debates on ethical issues.</jats:p>

Palabras clave: Multidisciplinary.

Pp. 1561-1561

New Institute Seen as Brains Behind Big Boost in Spending

Dennis Normile

<jats:p> <jats:bold>TOKYO</jats:bold> —A new $61 million Brain Science Institute at the Institute of Physical and Chemical Research is the centerpiece for an ambitious program to boost Japan's international profile in neuroscience and to better coordinate efforts at home. </jats:p>

Palabras clave: Multidisciplinary.

Pp. 1562-1563

Domain Names Windfall Causes Flap

Jeffrey Mervis

<jats:p>A $50-a-year fee to register Internet domain names has netted a pot of money that could grow to $60 million a year—and has triggered a free-for-all over who should manage the Internet. It has also sparked an internal debate within NSF over whether the agency should continue to oversee a medium that it helped create.</jats:p>

Palabras clave: Multidisciplinary.

Pp. 1563-1563

Why the West Stands Tall

Richard A. Kerr

<jats:p>From Denver, the “Mile-High City,” to California's Sierra Nevada, the American West stands high above sea level. For years, geologists thought that a thick, buoyant continental crust raised the West's spectacular scenery, but new geophysical surveys suggest that the forces holding up many Western mountains and plateaus come from much deeper, in Earth's mantle.</jats:p>

Palabras clave: Multidisciplinary.

Pp. 1564-1565

Is a Great Plateau Slip-Sliding Away?

Richard A. Kerr

<jats:p>The American West may be high, but it's slowly sinking—and sliding northwest toward the Oregon coast, according to a new geophysical theory.</jats:p>

Palabras clave: Multidisciplinary.

Pp. 1565-1565

Quantum Squeeze Wrings Uncertainty From Atom Waves

Daniel Clery

<jats:p>Quantum “noise” gets in the way of ultraprecise measurements of any physical quantity, such as a particle's location or a wave's frequency. In this issue, however, a team of physicists reports finding a way around this quantum limit for the wavelike vibrations of atoms in solids called phonons. By delivering ultrafast pulses of light to a sample of potassium tantalate, they squeezed quantum noise out of the phonons at certain times while making them noisier at others.</jats:p>

Palabras clave: Multidisciplinary.

Pp. 1566-1566

Superoxides Relay Ras Protein's Oncogenic Message

Elizabeth Pennisi

<jats:p> Health-conscious consumers may now have another reason for thinking that antioxidants might help protect against cancer. On page <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" page="1649" related-article-type="in-this-issue" vol="275" xlink:href="10.1126/science.275.5306.1649" xlink:type="simple">1649</jats:related-article> , researchers report new results suggesting that superoxide-—a free radical consisting of an oxygen molecule with an extra electron—helps a protein called Ras transmit its growth-stimulating signals to the nucleus. Because overactivity of this pathway is thought to contribute to the development of a wide variety of cancers, the work provides further support for the idea that reactive oxygen species such as superoxide are good targets for anticancer drugs. George Bush, eat your broccoli! </jats:p>

Palabras clave: Multidisciplinary.

Pp. 1567-1568

HOX Gene Links Limb, Genital Defects

Steven Dickman

<jats:p>The HOX gene family has helped to unlock the intricacies of development in animals from flies to mammals, but its role in humans has been a mystery. Now the second human HOX gene mutation has been found in a Michigan family. It causes abnormalities in both limbs and genitals—and raises some intriguing evolutionary ideas.</jats:p>

Palabras clave: Multidisciplinary.

Pp. 1568-1568

Labs Take Aim at Rapid-Fire Lasers for Fusion Power

Peter Weiss

<jats:p> <jats:bold>LIVERMORE, CALIFORNIA</jats:bold> —Laser researchers at Lawrence Livermore National Laboratory here and at the Naval Research Laboratory in Washington, D.C., are setting out to challenge the view that lasers can't live up to the demands of an inertial-confinement fusion power plant. Such a plant would have to blast a pellet of fuel with powerful beams many times a second‐a pace thousands of times faster than existing lasers can manage. New laser technology, however, could change all that. </jats:p>

Palabras clave: Multidisciplinary.

Pp. 1569-1569

The Weighty Matter of Names

Erik Stokstad

<jats:p>Signaling an end to pitched battles between rival labs, an international commission of chemists last month presented a revised list of names for elements 104 to 109 to chemistry's high court, the International Union of Pure and Applied Chemistry. IUPAC will rule on the names this August.</jats:p>

Palabras clave: Multidisciplinary.

Pp. 1570-1570