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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
Planarian Pluripotency
Jonathan M. W. Slack
<jats:p>Cellular and molecular details underlying tissue regeneration are revealed in the flatworm.</jats:p>
Palabras clave: Multidisciplinary.
Pp. 799-800
From Computational Design to a Protein That Binds
Bryan S. Der; Brian Kuhlman
<jats:p>Researchers use computational approaches to design two proteins from scratch that bind to the flu virus.</jats:p>
Palabras clave: Multidisciplinary.
Pp. 801-802
Brownian Motion Goes Ballistic
Peter N. Pusey
<jats:p>Measurements of the Brownian motion of particles in air and in water reveal a smooth “ballistic†motion at very short times.</jats:p>
Palabras clave: Multidisciplinary.
Pp. 802-803
Walter M. Fitch (1929–2011)
William R. Atchley
<jats:p>A meticulous biologist developed fundamental tools for the field of molecular evolution.</jats:p>
Palabras clave: Multidisciplinary.
Pp. 804-804
Comparing Photosynthetic and Photovoltaic Efficiencies and Recognizing the Potential for Improvement
Robert E. Blankenship; David M. Tiede; James Barber; Gary W. Brudvig; Graham Fleming; Maria Ghirardi; M. R. Gunner; Wolfgang Junge; David M. Kramer; Anastasios Melis; Thomas A. Moore; Christopher C. Moser; Daniel G. Nocera; Arthur J. Nozik; Donald R. Ort; William W. Parson; Roger C. Prince; Richard T. Sayre
<jats:p>Comparing photosynthetic and photovoltaic efficiencies is not a simple issue. Although both processes harvest the energy in sunlight, they operate in distinctly different ways and produce different types of products: biomass or chemical fuels in the case of natural photosynthesis and nonstored electrical current in the case of photovoltaics. In order to find common ground for evaluating energy-conversion efficiency, we compare natural photosynthesis with present technologies for photovoltaic-driven electrolysis of water to produce hydrogen. Photovoltaic-driven electrolysis is the more efficient process when measured on an annual basis, yet short-term yields for photosynthetic conversion under optimal conditions come within a factor of 2 or 3 of the photovoltaic benchmark. We consider opportunities in which the frontiers of synthetic biology might be used to enhance natural photosynthesis for improved solar energy conversion efficiency.</jats:p>
Palabras clave: Multidisciplinary.
Pp. 805-809
Clonogenic Neoblasts Are Pluripotent Adult Stem Cells That Underlie Planarian Regeneration
Daniel E. Wagner; Irving E. Wang; Peter W. Reddien
<jats:p>A pluripotent adult stem cell underlies flatworms’ amazing regenerative ability.</jats:p>
Palabras clave: Multidisciplinary.
Pp. 811-816
Computational Design of Proteins Targeting the Conserved Stem Region of Influenza Hemagglutinin
Sarel J. Fleishman; Timothy A. Whitehead; Damian C. Ekiert; Cyrille Dreyfus; Jacob E. Corn; Eva-Maria Strauch; Ian A. Wilson; David Baker
<jats:p>Proteins can be designed that bind to specific patches on target proteins to alter their subsequent interactions.</jats:p>
Palabras clave: Multidisciplinary.
Pp. 816-821
Interplay of Rotational, Relaxational, and Shear Dynamics in Solid 4 He
E. J. Pratt; B. Hunt; V. Gadagkar; M. Yamashita; M. J. Graf; A. V. Balatsky; J. C. Davis
<jats:p>Comprehensive measurements argue against the existence of the exotic supersolid quantum state of frozen helium.</jats:p>
Palabras clave: Multidisciplinary.
Pp. 821-824
Very Large Capacitance Enhancement in a Two-Dimensional Electron System
Lu Li; C. Richter; S. Paetel; T. Kopp; J. Mannhart; R. C. Ashoori
<jats:p>Electron correlation effects at the interface of two metal oxides lead to a lower chemical potential and enhance capacitance.</jats:p>
Palabras clave: Multidisciplinary.
Pp. 825-828
Beating Crystallization in Glass-Forming Metals by Millisecond Heating and Processing
William L. Johnson; Georg Kaltenboeck; Marios D. Demetriou; Joseph P. Schramm; Xiao Liu; Konrad Samwer; C. Paul Kim; Douglas C. Hofmann
<jats:p>Resistive heating can be used to rapidly heat a bulk metallic glass without inducing crystallization.</jats:p>
Palabras clave: Multidisciplinary.
Pp. 828-833