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324 Aktuelle Fachpublikationen zum Thema temperature

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Suppression of phase separation and giant enhancement of superconducting transition temperature in FeSe1-xTex thin films [Applied Physical Sciences]

17.02.2015 | Yoshinori Imai; Yuichi Sawada; Fuyuki Nabeshima; Atsutaka Maeda, Proceedings of the National Academy of Sciences current issue, 2015

We demonstrate the successful fabrication on CaF2 substrates of FeSe1−xTex films with 0≤x≤1, including the region of 0.1≤x≤0.4, which is well known to be the “phase-separation region,” via pulsed laser deposition that is a thermodynamically nonequilibrium method. In the resulting films, we ...

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Short time interval for condensation of high-temperature silicates in the solar accretion disk [Earth, Atmospheric, and Planetary Sciences]

03.02.2015 | Tu-Han Luu; Edward D. Young; Matthieu Gounelle; Marc Chaussidon, Proceedings of the National Academy of Sciences current issue, 2015

Chondritic meteorites are made of primitive components that record the first steps of formation of solids in our Solar System. Chondrules are the major component of chondrites, yet little is known about their formation mechanisms and history within the solar protoplanetary disk (SPD). We use the ...

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Neuronal UCP1 expression suggests a mechanism for local thermogenesis during hibernation [Physiology]

03.02.2015 | Willem J. Laursen; Marco Mastrotto; Dominik Pesta; Owen H. Funk; Jena B. Goodman; Dana K. Merriman; Nicholas Ingolia ..., Proceedings of the National Academy of Sciences current issue, 2015

Hibernating mammals possess a unique ability to reduce their body temperature to ambient levels, which can be as low as −2.9 °C, by active down-regulation of metabolism. Despite such a depressed physiologic phenotype, hibernators still maintain activity in their nervous systems, as evidenced by ...

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Giant reversible, facet-dependent, structural changes in a correlated-electron insulator induced by ionic liquid gating [Physics]

27.01.2015 | Jaewoo Jeong; Nagaphani B. Aetukuri; Donata Passarello; Steven D. Conradson; Mahesh G. Samant; Stuart S. P. Parkin, Proceedings of the National Academy of Sciences current issue, 2015

The use of electric fields to alter the conductivity of correlated electron oxides is a powerful tool to probe their fundamental nature as well as for the possibility of developing novel electronic devices. Vanadium dioxide (VO2) is an archetypical correlated electron system that displays a ...

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Temperature-dependent innate defense against the common cold virus limits viral replication at warm temperature in mouse airway cells [Immunology and Inflammation]

20.01.2015 | Ellen F. Foxman; James A. Storer; Megan E. Fitzgerald; Bethany R. Wasik; Lin Hou; Hongyu Zhao; Paul E. Turner; Anna ..., Proceedings of the National Academy of Sciences current issue, 2015

Most isolates of human rhinovirus, the common cold virus, replicate more robustly at the cool temperatures found in the nasal cavity (33–35 °C) than at core body temperature (37 °C). To gain insight into the mechanism of temperature-dependent growth, we compared the transcriptional response of ...

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Fermi surface reconstruction and multiple quantum phase transitions in the antiferromagnet CeRhIn5 [Applied Physical Sciences]

20.01.2015 | Lin Jiao; Ye Chen; Yoshimitsu Kohama; David Graf; E. D. Bauer; John Singleton; Jian-Xin Zhu; Zongfa Weng; Guiming Pa ..., Proceedings of the National Academy of Sciences current issue, 2015

Conventional, thermally driven continuous phase transitions are described by universal critical behavior that is independent of the specific microscopic details of a material. However, many current studies focus on materials that exhibit quantum-driven continuous phase transitions (quantum ...

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Sensory determinants of behavioral dynamics in Drosophila thermotaxis [Neuroscience]

13.01.2015 | Mason Klein; Bruno Afonso; Ashley J. Vonner; Luis Hernandez-Nunez; Matthew Berck; Christopher J. Tabone; Elizabeth A ..., Proceedings of the National Academy of Sciences current issue, 2015

Complex animal behaviors are built from dynamical relationships between sensory inputs, neuronal activity, and motor outputs in patterns with strategic value. Connecting these patterns illuminates how nervous systems compute behavior. Here, we study Drosophila larva navigation up temperature ...

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Core Concept: Quantum turbulence [Core Concepts]

06.01.2015 | Maggie McKee, Proceedings of the National Academy of Sciences current issue, 2015

Something strange happens when the helium in a balloon approaches a temperature close to absolute zero. It liquefies and becomes a mixture of a normal fluid and a superfluid, flowing without friction. Touch it and it will start moving, and once it does, the superfluid component will never stop ...

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High-pressure superconducting phase diagram of 6Li: Isotope effects in dense lithium [Physics]

06.01.2015 | Anne Marie Schaeffer; Scott R. Temple; Jasmine K. Bishop; Shanti Deemyad, Proceedings of the National Academy of Sciences current issue, 2015

We measured the superconducting transition temperature of 6Li between 16 and 26 GPa, and report the lightest system to exhibit superconductivity to date. The superconducting phase diagram of 6Li is compared with that of 7Li through simultaneous measurement in a diamond anvil cell (DAC). Below 21 ...

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Maternal temperature history activates Flowering Locus T in fruits to control progeny dormancy according to time of year [Plant Biology]

30.12.2014 | Min Chen; Dana R. MacGregor; Anuja Dave; Hannah Florance; Karen Moore; Konrad Paszkiewicz; Nicholas Smirnoff; Ian A. ..., Proceedings of the National Academy of Sciences current issue, 2014

Seasonal behavior is important for fitness in temperate environments but it is unclear how progeny gain their initial seasonal entrainment. Plants use temperature signals to measure time of year, and changes to life histories are therefore an important consequence of climate change. Here we show ...

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