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315 Aktuelle Fachpublikationen zum Thema temperature

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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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Reply to Abatzoglou et al.: Atmospheric controls on northwest United States air temperatures, 1948-2012 [Physical Sciences]

30.12.2014 | James A. Johnstone; Nathan J. Mantua, Proceedings of the National Academy of Sciences current issue, 2014

We recently documented a strong relationship between northeast Pacific sea-level pressure (SLP) and coastal North American sea surface temperature (SSTs) and surface air temperatures (SATs), concluding that atmospheric circulation changes produced nearly all observed coastal warming from 1900 to ...

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Electronic evidence of an insulator-superconductor crossover in single-layer FeSe/SrTiO3 films [Physics]

30.12.2014 | Junfeng He; Xu Liu; Wenhao Zhang; Lin Zhao; Defa Liu; Shaolong He; Daixiang Mou; Fangsen Li; Chenjia Tang; Zhi Li; L ..., Proceedings of the National Academy of Sciences current issue, 2014

In high-temperature cuprate superconductors, it is now generally agreed that superconductivity is realized by doping an antiferromagnetic Mott (charge transfer) insulator. The doping-induced insulator-to-superconductor transition has been widely observed in cuprates, which provides important ...

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Questionable evidence of natural warming of the northwestern United States [Physical Sciences]

30.12.2014 | John T. Abatzoglou; David E. Rupp; Philip W. Mote, Proceedings of the National Academy of Sciences current issue, 2014

Johnstone and Mantua (1) claim that changes in atmospheric circulation were the primary cause of the observed warming of sea surface temperature around the northeastern Pacific margins and surface air temperature (SAT) in Northern California, Oregon, and Washington from 1901 to 2012. The results ...

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Emergence of superconductivity in heavy-electron materials [Physics]

23.12.2014 | Yi-feng Yang; David Pines, Proceedings of the National Academy of Sciences current issue, 2014

Although the pairing glue for the attractive quasiparticle interaction responsible for unconventional superconductivity in heavy-electron materials has been identified as the spin fluctuations that arise from their proximity to a magnetic quantum critical point, there has been no model to ...

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Observation of ice-like water layers at an aqueous protein surface [Biophysics and Computational Biology]

16.12.2014 | Konrad Meister; Simona Strazdaite; Arthur L. DeVries; Stephan Lotze; Luuk L. C. Olijve; Ilja K. Voets; Huib J. Bakker, Proceedings of the National Academy of Sciences current issue, 2014

We study the properties of water at the surface of an antifreeze protein with femtosecond surface sum frequency generation spectroscopy. We find clear evidence for the presence of ice-like water layers at the ice-binding site of the protein in aqueous solution at temperatures above the freezing ...

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Energetics of metastudtite and implications for nuclear waste alteration [Chemistry]

16.12.2014 | Xiaofeng Guo; Sergey V. Ushakov; Sabrina Labs; Hildegard Curtius; Dirk Bosbach; Alexandra Navrotsky, Proceedings of the National Academy of Sciences current issue, 2014

Metastudtite, (UO2)O2(H2O)2, is one of two known natural peroxide minerals, but little is established about its thermodynamic stability. In this work, its standard enthalpy of formation, −1,779.6 ± 1.9 kJ/mol, was obtained by high temperature oxide melt drop solution calorimetry. Decomposition of ...

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Rational design and synthesis of an orally bioavailable peptide guided by NMR amide temperature coefficients [Biophysics and Computational Biology]

09.12.2014 | Conan K. Wang; Susan E. Northfield; Barbara Colless; Stephanie Chaousis; Ingrid Hamernig; Rink-Jan Lohman; Daniel S. ..., Proceedings of the National Academy of Sciences current issue, 2014

Enhancing the oral bioavailability of peptide drug leads is a major challenge in drug design. As such, methods to address this challenge are highly sought after by the pharmaceutical industry. Here, we propose a strategy to identify appropriate amides for N-methylation using temperature ...

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Force distribution affects vibrational properties in hard-sphere glasses [Physics]

02.12.2014 | Eric DeGiuli; Edan Lerner; Carolina Brito; Matthieu Wyart, Proceedings of the National Academy of Sciences current issue, 2014

We theoretically and numerically study the elastic properties of hard-sphere glasses and provide a real-space description of their mechanical stability. In contrast to repulsive particles at zero temperature, we argue that the presence of certain pairs of particles interacting with a small force ...

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Charging-free electrochemical system for harvesting low-grade thermal energy [Applied Physical Sciences]

02.12.2014 | Yuan Yang; Seok Woo Lee; Hadi Ghasemi; James Loomis; Xiaobo Li; Daniel Kraemer; Guangyuan Zheng; Yi Cui; Gang Chen, Proceedings of the National Academy of Sciences current issue, 2014

Efficient and low-cost systems are needed to harvest the tremendous amount of energy stored in low-grade heat sources ...

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