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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.1211649

Ultralight Metallic Microlattices

T. A. Schaedler; A. J. Jacobsen; A. Torrents; A. E. Sorensen; J. Lian; J. R. Greer; L. Valdevit; W. B. Carter

<jats:p>A route is developed for fabricating extremely low-density, hollow-strut metallic lattices.</jats:p>

Palabras clave: Multidisciplinary.

Pp. 962-965

doi: 10.1126/science.1212648

Silica-Like Malleable Materials from Permanent Organic Networks

Damien Montarnal; Mathieu Capelot; François Tournilhac; Ludwik Leibler

<jats:p>A polymer shows thermoset-like stability while displaying melt processability like that of a thermopolymer.</jats:p>

Palabras clave: Multidisciplinary.

Pp. 965-968

doi: 10.1126/science.1206980

Domain Dynamics During Ferroelectric Switching

Christopher T. Nelson; Peng Gao; Jacob R. Jokisaari; Colin Heikes; Carolina Adamo; Alexander Melville; Seung-Hyub Baek; Chad M. Folkman; Benjamin Winchester; Yijia Gu; Yuanming Liu; Kui Zhang; Enge Wang; Jiangyu Li; Long-Qing Chen; Chang-Beom Eom; Darrell G. Schlom; Xiaoqing Pan

<jats:p>The role of defects and interfaces on switching in ferroelectric materials is observed with high-resolution microscopy.</jats:p>

Palabras clave: Multidisciplinary.

Pp. 968-971

doi: 10.1126/science.1208708

Negative Frequency-Dependent Selection of Sexually Antagonistic Alleles in Myodes glareolus

Mikael Mokkonen; Hanna Kokko; Esa Koskela; Jussi Lehtonen; Tapio Mappes; Henna Martiskainen; Suzanne C. Mills

<jats:p>Selection of rare-male types in a population can maintain genetic variation that benefits one sex but harms the other.</jats:p>

Palabras clave: Multidisciplinary.

Pp. 972-974

doi: 10.1126/science.1206445

X-ray Emission Spectroscopy Evidences a Central Carbon in the Nitrogenase Iron-Molybdenum Cofactor

Kyle M. Lancaster; Michael Roemelt; Patrick Ettenhuber; Yilin Hu; Markus W. Ribbe; Frank Neese; Uwe Bergmann; Serena DeBeer

<jats:p>A central light atom in a cofactor at the nitrogenase active site is identified as a carbon.</jats:p>

Palabras clave: Multidisciplinary.

Pp. 974-977

doi: 10.1126/science.1210915

Structural Basis of Silencing: Sir3 BAH Domain in Complex with a Nucleosome at 3.0 Ã… Resolution

Karim-Jean Armache; Joseph D. Garlick; Daniele Canzio; Geeta J. Narlikar; Robert E. Kingston

<jats:p>A regulatory protein forms extensive interactions with the nucleosome core particle to create the basis for gene silencing.</jats:p>

Palabras clave: Multidisciplinary.

Pp. 977-982

doi: 10.1126/science.1211037

Active Starvation Responses Mediate Antibiotic Tolerance in Biofilms and Nutrient-Limited Bacteria

Dao Nguyen; Amruta Joshi-Datar; Francois Lepine; Elizabeth Bauerle; Oyebode Olakanmi; Karlyn Beer; Geoffrey McKay; Richard Siehnel; James Schafhauser; Yun Wang; Bradley E. Britigan; Pradeep K. Singh

<jats:p>During growth arrest, bacteria tolerate the presence of antibiotics, thanks to mechanisms that protect against oxidant stress.</jats:p>

Palabras clave: Multidisciplinary.

Pp. 982-986

doi: 10.1126/science.1209855

H 2 S: A Universal Defense Against Antibiotics in Bacteria

Konstantin Shatalin; Elena Shatalina; Alexander Mironov; Evgeny Nudler

<jats:p>Sulfide formation helps to protect various bacteria from antibiotic toxicity.</jats:p>

Palabras clave: Multidisciplinary.

Pp. 986-990

doi: 10.1126/science.1209609

Wolbachia Enhance Drosophila Stem Cell Proliferation and Target the Germline Stem Cell Niche

Eva M. Fast; Michelle E. Toomey; Kanchana Panaram; Danielle Desjardins; Eric D. Kolaczyk; Horacio M. Frydman

<jats:p> A bacterial endosymbiont up-regulates mitosis of <jats:italic>Drosophila</jats:italic> germline stem cells and blocks programmed cell death. </jats:p>

Palabras clave: Multidisciplinary.

Pp. 990-992

doi: 10.1126/science.1211053

Correction of Sickle Cell Disease in Adult Mice by Interference with Fetal Hemoglobin Silencing

Jian Xu; Cong Peng; Vijay G. Sankaran; Zhen Shao; Erica B. Esrick; Bryan G. Chong; Gregory C. Ippolito; Yuko Fujiwara; Benjamin L. Ebert; Philip W. Tucker; Stuart H. Orkin

<jats:p>Manipulation of a transcriptional repressor promotes expression of protective fetal globin genes.</jats:p>

Palabras clave: Multidisciplinary.

Pp. 993-996