Catálogo de publicaciones - revistas
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
Comment on “Active sites for CO 2 hydrogenation to methanol on Cu/ZnO catalysts”
Junji Nakamura
; Tadahiro Fujitani
; Sebastian Kuld
; Stig Helveg; Ib Chorkendorff
; Jens Sehested
<jats:p> Kattel <jats:italic>et al</jats:italic> . (Reports, 24 March 2017, p. 1296) report that a zinc on copper (Zn/Cu) surface undergoes oxidation to zinc oxide/copper (ZnO/Cu) during carbon dioxide (CO <jats:sub>2</jats:sub> ) hydrogenation to methanol and conclude that the Cu-ZnO interface is the active site for methanol synthesis. Similar experiments conducted two decades ago by Fujitani and Nakamura <jats:italic>et al</jats:italic> . demonstrated that Zn is attached to formate rather than being fully oxidized. </jats:p>
Palabras clave: Multidisciplinary.
Pp. No disponible
Island biogeography: Taking the long view of nature’s laboratories
Robert J. Whittaker
; José María Fernández-Palacios
; Thomas J. Matthews
; Michael K. Borregaard
; Kostas A. Triantis
<jats:title>Dynamics of island biodiversity</jats:title> <jats:p> Fifty years ago, MacArthur and Wilson published their influential book, <jats:italic>The Theory of Island Biogeography</jats:italic> . This work provided a quantitative framework for understanding the ecological processes governing the diversity of species on oceanic islands. Whittaker <jats:italic>et al.</jats:italic> review the subsequent progress in the field, focusing particularly on the integration of the ecological model with island geophysical dynamics. Recent work is showing how immigration, speciation, and extinction respond to the phases of emergence, development, and submergence in oceanic islands. </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="6354" page="eaam8326" related-article-type="in-this-issue" vol="357" xlink:href="10.1126/science.aam8326">eaam8326</jats:related-article> </jats:p>
Palabras clave: Multidisciplinary.
Pp. No disponible
Response to Comment on “Active sites for CO 2 hydrogenation to methanol on Cu/ZnO catalysts”
Shyam Kattel
; Pedro J. Ramírez
; Jingguang G. Chen
; José A. Rodriguez
; Ping Liu
<jats:p> In their Comment on the our recent Report, Nakamura <jats:italic>et al</jats:italic> . argue that our x-ray photoelectron spectroscopy (XPS) analysis was affected by the presence of formate species on the catalyst surface. This argument is not valid because the reactant gases were evacuated at temperatures from 525 to 575 kelvin, conditions under which formate is not stable on the catalyst surface. An analysis of the XPS results obtained after exposing zinc oxide/copper (111) [ZnO/Cu(111)] surfaces to hydrogen (H <jats:sub>2</jats:sub> ) and mixtures of carbon dioxide (CO <jats:sub>2</jats:sub> )/H <jats:sub>2</jats:sub> show an absence of carbon (C) 1s signal, no asymmetries in the oxygen (O) 1s peak, and a Zn:O intensity close to 1:1. Thus, the most active phase of these catalysts contained a ZnO-Cu interface. </jats:p>
Palabras clave: Multidisciplinary.
Pp. No disponible
Measuring and managing bias
Jeremy Berg
<jats:p>As someone who grew up with a mother who was a medical researcher, who has been married to a woman very active in scientific research for more than 30 years, and who has had many female colleagues and students, I was surprised when I first took a test to measure implicit gender bias and found that I have a strong automatic association between being male and being involved in science. We all carry a range of biases that are products of our culture and experiences or, in some cases, of outcomes that we desire. Fortunately, many such biases can be measured and, in some cases, effectively managed. A key is to first acknowledge their presence and then to take steps to minimize their influence on important decisions and results.</jats:p>
Palabras clave: Multidisciplinary.
Pp. 849-849
News at a glance
Carolyn Gramling
<jats:p>A roundup of weekly science policy and related news.</jats:p>
Palabras clave: Multidisciplinary.
Pp. 850-852
How an ocean climate cycle favored Harvey
Julia Rosen
<jats:p>Human factors may prolong storm-boosting Atlantic Multidecadal Oscillation phase.</jats:p>
Palabras clave: Multidisciplinary.
Pp. 853-854
Hurricane Harvey provides lab for U.S. forecast experiments
Paul Voosen
<jats:p>New model and satellites test their mettle against the storm.</jats:p>
Palabras clave: Multidisciplinary.
Pp. 854-854
Anti-inflammatory prevents heart attacks
Jennifer Couzin-Frankel
<jats:p>By vindicating theory, antibody result points to new approaches to protecting the heart.</jats:p>
Palabras clave: Multidisciplinary.
Pp. 855-855
Science suffers as China plugs holes in Great Firewall
Dennis Normile
<jats:p>New restrictions hamper access to sites useful for research.</jats:p>
Palabras clave: Multidisciplinary.
Pp. 856-856
India's dark matter quest
Pallava Bagla
<jats:p>Underground physics laboratory opens this week.</jats:p>
Palabras clave: Multidisciplinary.
Pp. 857-857