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Disponibilidad
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

Netrin-1 helps to get the blood flowing

Beverly A. Purnell

Palabras clave: Multidisciplinary.

Pp. 43.3-44

Blocking IL-22 to stop cancer spread

Kristen L. Mueller

Palabras clave: Multidisciplinary.

Pp. 43.4-44

Casting new shade onto ecosystem threshholds

Julia Fahrenkamp-Uppenbrink

Palabras clave: Multidisciplinary.

Pp. 43.5-44

Worming into host immune responses

Caroline Ash

Palabras clave: Multidisciplinary.

Pp. 43.6-44

A research paper in seven moves or less

Melissa McCartney

Palabras clave: Multidisciplinary.

Pp. 43.7-44

Nova seems shell-shocked after outburst

Margaret M. Moerchen

Palabras clave: Multidisciplinary.

Pp. 43.8-44

A terrestrial planet in a ~1-AU orbit around one member of a ∼15-AU binary

A. Gould; A. Udalski; I.-G. Shin; I. Porritt; J. Skowron; C. Han; J. C. Yee; S. Kozłowski; J.-Y. Choi; R. Poleski; Ł. Wyrzykowski; K. Ulaczyk; P. Pietrukowicz; P. Mróz; M. K. Szymański; M. Kubiak; I. Soszyński; G. Pietrzyński; B. S. Gaudi; G. W. Christie; J. Drummond; J. McCormick; T. Natusch; H. Ngan; T.-G. Tan; M. Albrow; D. L. DePoy; K.-H. Hwang; Y. K. Jung; C.-U. Lee; H. Park; R.W. Pogge; F. Abe; D. P. Bennett; I. A. Bond; C. S. Botzler; M. Freeman; A. Fukui; D. Fukunaga; Y. Itow; N. Koshimoto; P. Larsen; C. H. Ling; K. Masuda; Y. Matsubara; Y. Muraki; S. Namba; K. Ohnishi; L. Philpott; N. J. Rattenbury; To. Saito; D. J. Sullivan; T. Sumi; D. Suzuki; P. J. Tristram; N. Tsurumi; K. Wada; N. Yamai; P. C. M. Yock; A. Yonehara; Y. Shvartzvald; D. Maoz; S. Kaspi; M. Friedmann

<jats:title>Impolite planet ignores host's partner</jats:title> <jats:p> Many known exoplanets (planets outside our own solar system) are hosted by binary systems that contain two stars. These planets normally circle around both of their stars. Using microlensing data taken with a worldwide network of telescopes, Gould <jats:italic>et al.</jats:italic> found a planet twice the mass of Earth that circles just one of a pair of stars. The same approach has the potential to uncover other similar star systems and help to illuminate some of the mysteries of planet formation. </jats:p> <jats:p> <jats:italic>Science</jats:italic> , this issue p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6192" page="46" related-article-type="in-this-issue" vol="345" xlink:href="10.1126/science.1251527">46</jats:related-article> </jats:p>

Palabras clave: Multidisciplinary.

Pp. 46-49

Ras activation by SOS: Allosteric regulation by altered fluctuation dynamics

Lars Iversen; Hsiung-Lin Tu; Wan-Chen Lin; Sune M. Christensen; Steven M. Abel; Jeff Iwig; Hung-Jen Wu; Jodi Gureasko; Christopher Rhodes; Rebecca S. Petit; Scott D. Hansen; Peter Thill; Cheng-Han Yu; Dimitrios Stamou; Arup K. Chakraborty; John Kuriyan; Jay T. Groves

<jats:title>Outliers dominate signaling at cell membrane</jats:title> <jats:p> SOS enzymes act at cell membranes to activate Ras, a regulatory protein often overactive in cancer cells. Iversen <jats:italic>et al.</jats:italic> devised a system where they could observe the activity of individual enzymes at work. The single SOS molecules occupied stable states that varied greatly in their catalytic activity. Regulation appeared to occur by altering the time spent in active states. The overall activity of SOS was determined by just a few molecules that achieved the highest catalytic activity. The methods described should allow further detailed kinetic analysis of this and other signaling events that occur at the cell membrane — properties that it is not possible to discern from bulk biochemical measurements. </jats:p> <jats:p> <jats:italic>Science</jats:italic> , this issue p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6192" page="50" related-article-type="in-this-issue" vol="345" xlink:href="10.1126/science.1250373">50</jats:related-article> </jats:p>

Palabras clave: Multidisciplinary.

Pp. 50-54

Electron-hole asymmetric integer and fractional quantum Hall effect in bilayer graphene

A. Kou; B. E. Feldman; A. J. Levin; B. I. Halperin; K. Watanabe; T. Taniguchi; A. Yacoby

<jats:title>Breaking down graphene degeneracy</jats:title> <jats:p> Bilayer graphene has two layers of hexagonally arranged carbon atoms stacked on top of each other in a staggered configuration. This spatial arrangement results in degenerate electronic states: distinct states that have the same energy. Interaction between electrons can cause the states to separate in energy, and so can external fields (see the Perspective by LeRoy and Yankowitz). Kou <jats:italic>et al.</jats:italic> , Lee <jats:italic>et al.</jats:italic> , and Maher <jats:italic>et al.</jats:italic> used three distinct experimental setups that clarify different parameter regimes of bilayer graphene. </jats:p> <jats:p> <jats:italic>Science</jats:italic> , this issue p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6192" page="55" related-article-type="in-this-issue" vol="345" xlink:href="10.1126/science.1250270">55</jats:related-article> , p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6192" page="58" related-article-type="in-this-issue" vol="345" xlink:href="10.1126/science.1251003">58</jats:related-article> , p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6192" page="61" related-article-type="in-this-issue" vol="345" xlink:href="10.1126/science.1252875">61</jats:related-article> ; see also p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6192" page="31" related-article-type="in-this-issue" vol="345" xlink:href="10.1126/science.1256545">31</jats:related-article> </jats:p>

Palabras clave: Multidisciplinary.

Pp. 55-57

Chemical potential and quantum Hall ferromagnetism in bilayer graphene

Kayoung Lee; Babak Fallahazad; Jiamin Xue; David C. Dillen; Kyounghwan Kim; Takashi Taniguchi; Kenji Watanabe; Emanuel Tutuc

<jats:title>Breaking down graphene degeneracy</jats:title> <jats:p> Bilayer graphene has two layers of hexagonally arranged carbon atoms stacked on top of each other in a staggered configuration. This spatial arrangement results in degenerate electronic states: distinct states that have the same energy. Interaction between electrons can cause the states to separate in energy, and so can external fields (see the Perspective by LeRoy and Yankowitz). Kou <jats:italic>et al.</jats:italic> , Lee <jats:italic>et al.</jats:italic> , and Maher <jats:italic>et al.</jats:italic> used three distinct experimental setups that clarify different parameter regimes of bilayer graphene. </jats:p> <jats:p> <jats:italic>Science</jats:italic> , this issue p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6192" page="55" related-article-type="in-this-issue" vol="345" xlink:href="10.1126/science.1250270">55</jats:related-article> , p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6192" page="58" related-article-type="in-this-issue" vol="345" xlink:href="10.1126/science.1251003">58</jats:related-article> , p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6192" page="61" related-article-type="in-this-issue" vol="345" xlink:href="10.1126/science.1252875">61</jats:related-article> ; see also p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6192" page="31" related-article-type="in-this-issue" vol="345" xlink:href="10.1126/science.1256545">31</jats:related-article> </jats:p>

Palabras clave: Multidisciplinary.

Pp. 58-61