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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

naturales

Ciencias naturales

Tabla de contenidos

doi: 10.1126/science.1198458

Solvent-Free Oxidation of Primary Carbon-Hydrogen Bonds in Toluene Using Au-Pd Alloy Nanoparticles

Lokesh Kesavan; Ramchandra Tiruvalam; Mohd Hasbi Ab Rahim; Mohd Izham bin Saiman; Dan I. Enache; Robert L. Jenkins; Nikolaos Dimitratos; Jose A. Lopez-Sanchez; Stuart H. Taylor; David W. Knight; Christopher J. Kiely; Graham J. Hutchings

<jats:p>A gold- and palladium-based catalyst can be used to oxidize toluene and form a commercially useful ester.</jats:p>

Palabras clave: Multidisciplinary.

Pp. 195-199

doi: 10.1126/science.1197451

Supracolloidal Reaction Kinetics of Janus Spheres

Qian Chen; Jonathan K. Whitmer; Shan Jiang; Sung Chul Bae; Erik Luijten; Steve Granick

<jats:p>Colloidal particles that are charged on one side and hydrophobic on the other can form chiral helices in salt solutions.</jats:p>

Palabras clave: Multidisciplinary.

Pp. 199-202

doi: 10.1126/science.1196812

The Deglacial Evolution of North Atlantic Deep Convection

David J. R. Thornalley; Stephen Barker; Wallace S. Broecker; Henry Elderfield; I. Nick McCave

<jats:p>Radiocarbon data reveal changes in the timing and strength of deep ocean convection during the last glacial termination.</jats:p>

Palabras clave: Multidisciplinary.

Pp. 202-205

doi: 10.1126/science.1198467

A Basal Dinosaur from the Dawn of the Dinosaur Era in Southwestern Pangaea

Ricardo N. Martinez; Paul C. Sereno; Oscar A. Alcober; Carina E. Colombi; Paul R. Renne; Isabel P. Montañez; Brian S. Currie

<jats:p>Two hundred thirty million years ago, in what is now Argentina, dinosaurs could be found as the dominant carnivores or as small herbivores.</jats:p>

Palabras clave: Multidisciplinary.

Pp. 206-210

doi: 10.1126/science.1199427

Writing About Testing Worries Boosts Exam Performance in the Classroom

Gerardo Ramirez; Sian L. Beilock

<jats:title>Write Your Worries Away</jats:title> <jats:p> Tests and exams are stressful for many people. Students who “choke” at an exam may perform less well than their knowledge base warrants. Such results can accumulate to generate reduced educational achievements and expectations. Studying young adults performing math tests, <jats:bold>Ramirez and Beilock</jats:bold> (p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" page="211" related-article-type="in-this-issue" vol="331" xlink:href="10.1126/science.1199427">211</jats:related-article> ) found that a brief intervention—writing about their anxiety about the upcoming exam—helped students to do better in the exam. Perhaps by acknowledging their fears, students were able to tame distracting emotions. </jats:p>

Palabras clave: Multidisciplinary.

Pp. 211-213

doi: 10.1126/science.1196901

Genomic Signatures Predict Migration and Spawning Failure in Wild Canadian Salmon

Kristina M. Miller; Shaorong Li; Karia H. Kaukinen; Norma Ginther; Edd Hammill; Janelle M. R. Curtis; David A. Patterson; Thomas Sierocinski; Louise Donnison; Paul Pavlidis; Scott G. Hinch; Kimberly A. Hruska; Steven J. Cooke; Karl K. English; Anthony P. Farrell

<jats:p>High mortality of sockeye salmon in the Fraser River is associated with signals of metabolic and immune stress.</jats:p>

Palabras clave: Multidisciplinary.

Pp. 214-217

doi: 10.1126/science.1197203

The Structure of Human 5-Lipoxygenase

Nathaniel C. Gilbert; Sue G. Bartlett; Maria T. Waight; David B. Neau; William E. Boeglin; Alan R. Brash; Marcia E. Newcomer

<jats:p>Substitution of a destabilizing sequence has allowed crystallization of a key enzyme of the inflammatory response.</jats:p>

Palabras clave: Multidisciplinary.

Pp. 217-219

doi: 10.1126/science.1197243

Light-Driven Changes in Energy Metabolism Directly Entrain the Cyanobacterial Circadian Oscillator

Michael J. Rust; Susan S. Golden; Erin K. O’Shea

<jats:p>Cyanobacterial circadian clock components are directly coupled to the metabolic status of the cell through interactions with adenine nucleotides.</jats:p>

Palabras clave: Multidisciplinary.

Pp. 220-223

doi: 10.1126/science.1198020

Suppression of Avian Influenza Transmission in Genetically Modified Chickens

Jon Lyall; Richard M. Irvine; Adrian Sherman; Trevelyan J. McKinley; Alejandro Núñez; Auriol Purdie; Linzy Outtrim; Ian H. Brown; Genevieve Rolleston-Smith; Helen Sang; Laurence Tiley

<jats:p>Transgenic birds expressing a short hairpin RNA that blocks viral polymerase hinder influenza transmission.</jats:p>

Palabras clave: Multidisciplinary.

Pp. 223-226

doi: 10.1126/science.1198331

Human Tears Contain a Chemosignal

Shani Gelstein; Yaara Yeshurun; Liron Rozenkrantz; Sagit Shushan; Idan Frumin; Yehudah Roth; Noam Sobel

<jats:p>Merely sniffing women's negative emotional tears reduces sexual arousal in men.</jats:p>

Palabras clave: Multidisciplinary.

Pp. 226-230