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113 Aktuelle Fachpublikationen zum Thema temperature

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[Report] Topological defect dynamics in operando battery nanoparticles

19.06.2015 | A. Ulvestad; A. Singer; J. N. Clark; H. M. Cho; J. W. Kim; R. Harder; J. Maser; Y. S. Meng; O. G. Shpyrko, Science , 2015

Topological defects can markedly alter nanomaterial properties. This presents opportunities for “defect engineering,” where desired functionalities are generated through defect manipulation. However, imaging defects in working devices with nanoscale resolution remains elusive. We report ...

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[In Depth] The return of Philae

19.06.2015 | Eric Hand; Daniel Clery, Science , 2015

The Philae comet lander has woken up from a 7-month slumber; now the European Space Agency is trying to communicate with it and get it to embark on new experiments. Following an awkward landing in a heavily shadowed area on comet 67P/Churyumov-Gerasimenko in November, Philae's batteries quickly ...

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[Perspective] Can climate feel the pressure?

12.06.2015 | Daniel J. Peppe; Dana L. Royer, Science , 2015

Atmospheric carbon dioxide (CO2) concentrations are widely held to be the main driver of climate change through the Phanerozoic (the past 541 million years), with warm intervals corresponding to high CO2 concentrations and cold intervals having low CO2 concentrations (1) (see the figure). ...

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[Report] Long-term climate forcing by atmospheric oxygen concentrations

12.06.2015 | Christopher J. Poulsen; Clay Tabor; Joseph D. White, Science , 2015

The percentage of oxygen in Earth’s atmosphere varied between 10% and 35% throughout the Phanerozoic. These changes have been linked to the evolution, radiation, and size of animals but have not been considered to affect climate. We conducted simulations showing that modulation of the partial ...

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[In Depth] Lost and found: Earth's missing heat

05.06.2015 | Carolyn Gramling, Science , 2015

What if the missing heat has been there all along? In 2013, the Intergovernmental Panel on Climate Change flagged an odd phenomenon: Atmospheric temperature data collected over the past few decades suggested that global warming had slowed down beginning around 1998. Global warming skeptics ...

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[Perspective] Taming the temperamental metal transformation

29.05.2015 | Richard D. James, Science , 2015

One of the most delightful scientific demonstrations is the shape-memory effect in binary nickel-titanium (NiTi): Stretch out a spring of this alloy so it is apparently permanently deformed, drop it into a cup of hot coffee, and it literally jumps back to its original shape (1). However, looks ...

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[Special Issue Research Article] Structure and function of the global ocean microbiome

22.05.2015 | Shinichi Sunagawa; Luis Pedro Coelho; Samuel Chaffron; Jens Roat Kultima; Karine Labadie; Guillem Salazar; Bardya Dj ..., Science , 2015

Microbes are dominant drivers of biogeochemical processes, yet drawing a global picture of functional diversity, microbial community structure, and their ecological determinants remains a grand challenge. We analyzed 7.2 terabases of metagenomic data from 243 Tara Oceans samples from 68 locations ...

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[Report] The dominant role of semi-arid ecosystems in the trend and variability of the land CO2 sink

22.05.2015 | Anders Ahlström; Michael R. Raupach; Guy Schurgers; Benjamin Smith; Almut Arneth; Martin Jung; Markus Reichstein; Jo ..., Science , 2015

The growth rate of atmospheric carbon dioxide (CO2) concentrations since industrialization is characterized by large interannual variability, mostly resulting from variability in CO2 uptake by terrestrial ecosystems (typically termed carbon sink). However, the contributions of regional ecosystems ...

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[Report] A virus that infects a hyperthermophile encapsidates A-form DNA

22.05.2015 | Frank DiMaio; Xiong Yu; Elena Rensen; Mart Krupovic; David Prangishvili; Edward H. Egelman, Science , 2015

Extremophiles, microorganisms thriving in extreme environmental conditions, must have proteins and nucleic acids that are stable at extremes of temperature and pH. The nonenveloped, rod-shaped virus SIRV2 (Sulfolobus islandicus rod-shaped virus 2) infects the hyperthermophilic acidophile ...

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[Report] Whole-body endothermy in a mesopelagic fish, the opah, Lampris guttatus

15.05.2015 | Nicholas C. Wegner; Owyn E. Snodgrass; Heidi Dewar; John R. Hyde, Science , 2015

Endothermy (the metabolic production and retention of heat to warm body temperature above ambient) enhances physiological function, and whole-body endothermy generally sets mammals and birds apart from other animals. Here, we describe a whole-body form of endothermy in a fish, the opah (Lampris ...

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