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Science
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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
1880-
Cobertura temática
Tabla de contenidos
Pebbles on Mars
Douglas J. Jerolmack
<jats:p> The observation of conglomerates by the Mars rover Curiosity provides the most definitive proof yet of ancient river flow. <jats:named-content content-type="related-content"> [Also see Research Article by <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6136" page="1068" related-article-type="in-this-issue" vol="340" xlink:href="10.1126/science.1237317"> Williams <jats:italic>et al.</jats:italic> </jats:related-article> ] </jats:named-content> </jats:p>
Palabras clave: Multidisciplinary.
Pp. 1055-1056
GATORs Take a Bite Out of mTOR
Reuben J. Shaw
<jats:p> A negative regulator of amino acid sensing by the mTOR signaling pathway is identified and discovered to be inactivated in cancers. <jats:named-content content-type="related-content"> [Also see Report by <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6136" page="1100" related-article-type="in-this-issue" vol="340" xlink:href="10.1126/science.1232044"> Bar-Peled <jats:italic>et al.</jats:italic> </jats:related-article> ] </jats:named-content> </jats:p>
Palabras clave: Multidisciplinary.
Pp. 1056-1057
Neuronal Birth to Cortical Circuitry
Stewart Anderson; Douglas Coulter
<jats:p>Developmental genetics of single neuron populations can reveal how cortical circuits are built and how neuropsychiatric diseases arise.</jats:p>
Palabras clave: Multidisciplinary.
Pp. 1058-1059
Structural MS Pulls Its Weight
Michal Sharon
<jats:p>Mass spectrometry provides insights into the structure and dynamics of ever-larger protein assemblies and associated biomolecules.</jats:p>
Palabras clave: Multidisciplinary.
Pp. 1059-1060
Students as Collaborators in Systems Biology Research
Susan McClatchy; Deborah McGann; Robert Gotwals; Amanda Baskett; Gary Churchill
<jats:p>Quantitative Trait Mapping, an IBI prize–winning module, immerses students in the role of a systems biology researcher.</jats:p>
Palabras clave: Multidisciplinary.
Pp. 1061-1062
AAAS News and Notes
<jats:p> A monthly roundup of recent news and projects of <jats:italic>Science</jats:italic> 's publisher, the American Association for the Advancement of Science. </jats:p>
Palabras clave: Multidisciplinary.
Pp. 1063-1063
Enantio- and Diastereodivergent Dual Catalysis: α-Allylation of Branched Aldehydes
Simon Krautwald; David Sarlah; Michael A. Schafroth; Erick M. Carreira
<jats:title>Independent Chiral Catalysts</jats:title> <jats:p> Synthetic catalysts can be prepared in their mirror-image form and thereby furnish the mirror-image (enantiomer) of the reaction product. In practice, however, this versatility is largely limited to products featuring a single stereocenter that accounts for the dissymmetry. <jats:bold> Krautwald <jats:italic>et al.</jats:italic> </jats:bold> (p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6136" page="1065" related-article-type="in-this-issue" vol="340" xlink:href="10.1126/science.1237068">1065</jats:related-article> ; see the Perspective by <jats:bold> <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6136" page="1052" related-article-type="in-this-issue" vol="340" xlink:href="10.1126/science.1238769">Schindler and Jacobsen</jats:related-article> </jats:bold> ) now report a pair of chiral catalysts—an iridium complex and an amine—that operate in concert to facilitate carbon-carbon bond formation, while retaining independent stereoselectivity toward their respective sides of the bond. </jats:p>
Palabras clave: Multidisciplinary.
Pp. 1065-1068
Martian Fluvial Conglomerates at Gale Crater
R. M. E. Williams; J. P. Grotzinger; W. E. Dietrich; S. Gupta; D. Y. Sumner; R. C. Wiens; N. Mangold; M. C. Malin; K. S. Edgett; S. Maurice; O. Forni; O. Gasnault; A. Ollila; H. E. Newsom; G. Dromart; M. C. Palucis; R. A. Yingst; R. B. Anderson; K. E. Herkenhoff; S. Le Mouélic; W. Goetz; M. B. Madsen; A. Koefoed; J. K. Jensen; J. C. Bridges; S. P. Schwenzer; K. W. Lewis; K. M. Stack; D. Rubin; L. C. Kah; J. F. Bell; J. D. Farmer; R. Sullivan; T. Van Beek; D. L. Blaney; O. Pariser; R. G. Deen; Osku Kemppinen; Nathan Bridges; Jeffrey R. Johnson; Michelle Minitti; David Cremers; Lauren Edgar; Austin Godber; Meenakshi Wadhwa; Danika Wellington; Ian McEwan; Claire Newman; Mark Richardson; Antoine Charpentier; Laurent Peret; Penelope King; Jennifer Blank; Gerald Weigle; Mariek Schmidt; Shuai Li; Ralph Milliken; Kevin Robertson; Vivian Sun; Michael Baker; Christopher Edwards; Bethany Ehlmann; Kenneth Farley; Jennifer Griffes; Hayden Miller; Megan Newcombe; Cedric Pilorget; Melissa Rice; Kirsten Siebach; Edward Stolper; Claude Brunet; Victoria Hipkin; Richard Léveillé; Geneviève Marchand; Pablo Sobrón Sánchez; Laurent Favot; George Cody; Andrew Steele; Lorenzo Flückiger; David Lees; Ara Nefian; Mildred Martin; Marc Gailhanou; Frances Westall; Guy Israël; Christophe Agard; Julien Baroukh; Christophe Donny; Alain Gaboriaud; Philippe Guillemot; Vivian Lafaille; Eric Lorigny; Alexis Paillet; René Pérez; Muriel Saccoccio; Charles Yana; Carlos Armiens Aparicio; Javier Caride Rodríguez; Isaías Carrasco Blázquez; Felipe Gómez Gómez; Javier Gómez Elvira; Sebastian Hettrich; Alain Lepinette Malvitte; Mercedes Marín Jiménez; Jesús Martínez Frías; Javier Martín Soler; F. Javier Martín Torres; Antonio Molina Jurado; Luis Mora Sotomayor; Guillermo Muñoz Caro; Sara Navarro López; Verónica Peinado González; Jorge Pla García; José Antonio Rodriguez Manfredi; Julio José Romeral Planelló; Sara Alejandra Sans Fuentes; Eduardo Sebastian Martinez; Josefina Torres Redondo; Roser Urqui O'Callaghan; María-Paz Zorzano Mier; Steve Chipera; Jean-Luc Lacour; Patrick Mauchien; Jean-Baptiste Sirven; Heidi Manning; Alberto Fairén; Alexander Hayes; Jonathan Joseph; Steven Squyres; Peter Thomas; Audrey Dupont; Angela Lundberg; Noureddine Melikechi; Alissa Mezzacappa; Julia DeMarines; David Grinspoon; Günther Reitz; Benito Prats; Evgeny Atlaskin; Maria Genzer; Ari-Matti Harri; Harri Haukka; Henrik Kahanpää; Janne Kauhanen; Mark Paton; Jouni Polkko; Walter Schmidt; Tero Siili; Cécile Fabre; James Wray; Mary Beth Wilhelm; Franck Poitrasson; Kiran Patel; Stephen Gorevan; Stephen Indyk; Gale Paulsen; David Bish; Juergen Schieber; Brigitte Gondet; Yves Langevin; Claude Geffroy; David Baratoux; Gilles Berger; Alain Cros; Claude d Uston; Jérémie Lasue; Qiu-Mei Lee; Pierre-Yves Meslin; Etienne Pallier; Yann Parot; Patrick Pinet; Susanne Schröder; Mike Toplis; Éric Lewin; Will Brunner; Ezat Heydari; Cherie Achilles; Dorothy Oehler; Brad Sutter; Michel Cabane; David Coscia; Cyril Szopa; François Robert; Violaine Sautter; Marion Nachon; Arnaud Buch; Fabien Stalport; Patrice Coll; Pascaline François; François Raulin; Samuel Teinturier; James Cameron; Sam Clegg; Agnès Cousin; Dorothea DeLapp; Robert Dingler; Ryan Steele Jackson; Stephen Johnstone; Nina Lanza; Cynthia Little; Tony Nelson; Richard B. Williams; Andrea Jones; Laurel Kirkland; Allan Treiman; Burt Baker; Bruce Cantor; Michael Caplinger; Scott Davis; Brian Duston; Donald Fay; Craig Hardgrove; David Harker; Paul Herrera; Elsa Jensen; Megan R. Kennedy; Gillian Krezoski; Daniel Krysak; Leslie Lipkaman; Elaina McCartney; Sean McNair; Brian Nixon; Liliya Posiolova; Michael Ravine; Andrew Salamon; Lee Saper; Kevin Stoiber; Kimberley Supulver; Jason Van Beek; Robert Zimdar; Katherine Louise French; Karl Iagnemma; Kristen Miller; Roger Summons; Fred Goesmann; Stubbe Hviid; Micah Johnson; Matthew Lefavor; Eric Lyness; Elly Breves; M. Darby Dyar; Caleb Fassett; David F. Blake; Thomas Bristow; David DesMarais; Laurence Edwards; Robert Haberle; Tori Hoehler; Jeff Hollingsworth; Melinda Kahre; Leslie Keely; Christopher McKay; Lora Bleacher; William Brinckerhoff; David Choi; Pamela Conrad; Jason P. Dworkin; Jennifer Eigenbrode; Melissa Floyd; Caroline Freissinet; James Garvin; Daniel Glavin; Daniel Harpold; Paul Mahaffy; David K. Martin; Amy McAdam; Alexander Pavlov; Eric Raaen; Michael D. Smith; Jennifer Stern; Florence Tan; Melissa Trainer; Michael Meyer; Arik Posner; Mary Voytek; Robert C. Anderson; Andrew Aubrey; Luther W. Beegle; Alberto Behar; David Brinza; Fred Calef; Lance Christensen; Joy A. Crisp; Lauren DeFlores; Jason Feldman; Sabrina Feldman; Gregory Flesch; Joel Hurowitz; Insoo Jun; Didier Keymeulen; Justin Maki; Michael Mischna; John Michael Morookian; Timothy Parker; Betina Pavri; Marcel Schoppers; Aaron Sengstacken; John J. Simmonds; Nicole Spanovich; Manuel de la Torre Juarez; Ashwin R. Vasavada; Christopher R. Webster; Albert Yen; Paul Douglas Archer; Francis Cucinotta; John H. Jones; Douglas Ming; Richard V. Morris; Paul Niles; Elizabeth Rampe; Thomas Nolan; Martin Fisk; Leon Radziemski; Bruce Barraclough; Steve Bender; Daniel Berman; Eldar Noe Dobrea; Robert Tokar; David Vaniman; Laurie Leshin; Timothy Cleghorn; Wesley Huntress; Gérard Manhès; Judy Hudgins; Timothy Olson; Noel Stewart; Philippe Sarrazin; John Grant; Edward Vicenzi; Sharon A. Wilson; Mark Bullock; Bent Ehresmann; Victoria Hamilton; Donald Hassler; Joseph Peterson; Scot Rafkin; Cary Zeitlin; Fedor Fedosov; Dmitry Golovin; Natalya Karpushkina; Alexander Kozyrev; Maxim Litvak; Alexey Malakhov; Igor Mitrofanov; Maxim Mokrousov; Sergey Nikiforov; Vasily Prokhorov; Anton Sanin; Vladislav Tretyakov; Alexey Varenikov; Andrey Vostrukhin; Ruslan Kuzmin; Benton Clark; Michael Wolff; Scott McLennan; Oliver Botta; Darrell Drake; Keri Bean; Mark Lemmon; Ella Mae Lee; Robert Sucharski; Miguel Ángel de Pablo Hernández; Juan José Blanco Ávalos; Miguel Ramos; Myung-Hee Kim; Charles Malespin; Ianik Plante; Jan-Peter Muller; Rafael Navarro González; Ryan Ewing; William Boynton; Robert Downs; Mike Fitzgibbon; Karl Harshman; Shaunna Morrison; Onno Kortmann; Amy Williams; Günter Lugmair; Michael A. Wilson; Bruce Jakosky; Tonci Balic Zunic; Jens Frydenvang; Kjartan Kinch; Susan Louise Svane Stipp; Nick Boyd; John L. Campbell; Ralf Gellert; Glynis Perrett; Irina Pradler; Scott VanBommel; Samantha Jacob; Tobias Owen; Scott Rowland; Hannu Savijärvi; Eckart Boehm; Stephan Böttcher; Sönke Burmeister; Jingnan Guo; Jan Köhler; César Martín García; Reinhold Mueller Mellin; Robert Wimmer Schweingruber; Timothy McConnochie; Mehdi Benna; Heather Franz; Hannah Bower; Anna Brunner; Hannah Blau; Thomas Boucher; Marco Carmosino; Sushil Atreya; Harvey Elliott; Douglas Halleaux; Nilton Rennó; Michael Wong; Robert Pepin; Beverley Elliott; John Spray; Lucy Thompson; Suzanne Gordon; Joshua Williams; Paulo Vasconcelos; Jennifer Bentz; Kenneth Nealson; Radu Popa; Jeffrey Moersch; Christopher Tate; Mackenzie Day; Gary Kocurek; Bernard Hallet; Ronald Sletten; Raymond Francis; Emily McCullough; Ed Cloutis; Inge Loes ten Kate; Raymond Arvidson; Abigail Fraeman; Daniel Scholes; Susan Slavney; Thomas Stein; Jennifer Ward; Jeffrey Berger; John E. Moores;
<jats:title>Going to Mars</jats:title> <jats:p> The Mars Science Laboratory spacecraft containing the Curiosity rover, was launched from Earth in November 2011 and arrived at Gale crater on Mars in August 2012. <jats:bold> Zeitlin <jats:italic>et al.</jats:italic> </jats:bold> (p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6136" page="1080" related-article-type="in-this-issue" vol="340" xlink:href="10.1126/science.1235989">1080</jats:related-article> ) report measurements of the energetic particle radiation environment inside the spacecraft during its cruise to Mars, confirming the hazard likely to be posed by this radiation to astronauts on a future potential trip to Mars. <jats:bold> Williams <jats:italic>et al.</jats:italic> </jats:bold> (p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6136" page="1068" related-article-type="in-this-issue" vol="340" xlink:href="10.1126/science.1237317">1068</jats:related-article> , see the Perspective by <jats:bold> <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6136" page="1055" related-article-type="in-this-issue" vol="340" xlink:href="10.1126/science.1239343">Jerolmack</jats:related-article> </jats:bold> ) report the detection of sedimentary conglomerates (pebbles mixed with sand and turned to rock) at Gale crater. The rounding of the rocks suggests abrasion of the pebbles as they were transported by flowing water several kilometers or more from their source. </jats:p>
Palabras clave: Multidisciplinary.
Pp. 1068-1072
High-Strength Chemical-Vapor–Deposited Graphene and Grain Boundaries
Gwan-Hyoung Lee; Ryan C. Cooper; Sung Joo An; Sunwoo Lee; Arend van der Zande; Nicholas Petrone; Alexandra G. Hammerberg; Changgu Lee; Bryan Crawford; Warren Oliver; Jeffrey W. Kysar; James Hone
<jats:title>Graphene Staying Strong</jats:title> <jats:p> Although exfoliated graphene can be extremely strong, it is produced on too small a scale for materials application. Graphene can be produced on a more practical scale by chemical vapor deposition, but the presence of grain boundaries between crystallites apparently weakens the material. <jats:bold> Lee <jats:italic>et al.</jats:italic> </jats:bold> (p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6136" page="1073" related-article-type="in-this-issue" vol="340" xlink:href="10.1126/science.1235126">1073</jats:related-article> ) show that postprocessing steps during the removal of the graphene sheets can oxidize the grain boundaries and weaken them. If these steps are avoided, the material is comparable in strength to exfoliated graphene. </jats:p>
Palabras clave: Multidisciplinary.
Pp. 1073-1076
Unwinding of a Skyrmion Lattice by Magnetic Monopoles
P. Milde; D. Köhler; J. Seidel; L. M. Eng; A. Bauer; A. Chacon; J. Kindervater; S. Mühlbauer; C. Pfleiderer; S. Buhrandt; C. Schütte; A. Rosch
<jats:title>Hedgehogs, Whirls, and Zippers</jats:title> <jats:p> Topologically ordered materials at certain ranges of temperature and magnetic field can form a regular lattice of magnetic whirls called skyrmions. <jats:bold> Milde <jats:italic>et al.</jats:italic> </jats:bold> (p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6136" page="1076" related-article-type="in-this-issue" vol="340" xlink:href="10.1126/science.1234657">1076</jats:related-article> ) studied the destruction of a skyrmion lattice with varying magnetic fields by imaging the surface magnetic structure. Magnetic force microscopy revealed a pairwise merging of skyrmions on the surface. Furthermore, in the bulk, a hedgehog-like spin structure with the properties of the elusive magnetic monopole was needed to "zip" together the corresponding skyrmion lines. </jats:p>
Palabras clave: Multidisciplinary.
Pp. 1076-1080