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346 Aktuelle Fachpublikationen zum Thema temperature

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Photodrive of magnetic bubbles via magnetoelastic waves [Physics]

21.07.2015 | Naoki Ogawa; Wataru Koshibae; Aron Jonathan Beekman; Naoto Nagaosa; Masashi Kubota; Masashi Kawasaki; Yoshinori Tokura, Proceedings of the National Academy of Sciences current issue, 2015

Precise control of magnetic domain walls continues to be a central topic in the field of spintronics to boost infotech, logic, and memory applications. One way is to drive the domain wall by current in metals. In insulators, the incoherent flow of phonons and magnons induced by the temperature ...

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Supercooled spin liquid state in the frustrated pyrochlore Dy2Ti2O7 [Physics]

14.07.2015 | Ethan R. Kassner; Azar B. Eyvazov; Benjamin Pichler; Timothy J. S. Munsie; Hanna A. Dabkowska; Graeme M. Luke; J. C. ..., Proceedings of the National Academy of Sciences current issue, 2015

A “supercooled” liquid develops when a fluid does not crystallize upon cooling below its ordering temperature. Instead, the microscopic relaxation times diverge so rapidly that, upon further cooling, equilibration eventually becomes impossible and glass formation occurs. Classic supercooled ...

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Drosophila circadian rhythms in seminatural environments: Summer afternoon component is not an artifact and requires TrpA1 channels [Genetics]

14.07.2015 | Edward W. Green; Emma K. O’Callaghan; Celia N. Hansen; Stefano Bastianello; Supriya Bhutani; Stefano Vanin; James Do ..., Proceedings of the National Academy of Sciences current issue, 2015

Under standard laboratory conditions of rectangular light/dark cycles and constant warm temperature, Drosophila melanogaster show bursts of morning (M) and evening (E) locomotor activity and a “siesta” in the middle of the day. These M and E components have been critical for developing the ...

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Epidermal TRPM8 channel isoform controls the balance between keratinocyte proliferation and differentiation in a cold-dependent manner [Cell Biology]

30.06.2015 | Gabriel Bidaux; Anne-sophie Borowiec; Dmitri Gordienko; Benjamin Beck; George G. Shapovalov; Loïc Lemonnier; Matthie ..., Proceedings of the National Academy of Sciences current issue, 2015

Deviation of the ambient temperature is one of the most ubiquitous stimuli that continuously affect mammals’ skin. Although the role of the warmth receptors in epidermal homeostasis (EH) was elucidated in recent years, the mystery of the keratinocyte mild-cold sensor remains unsolved. Here we ...

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Temperature dependence of amino acid hydrophobicities [Chemistry]

16.06.2015 | Richard Wolfenden; Charles A. Lewis Jr.; Yang Yuan; Charles W. Carter Jr., Proceedings of the National Academy of Sciences current issue, 2015

The hydrophobicities of the 20 common amino acids are reflected in their tendencies to appear in interior positions in globular proteins and in deeply buried positions of membrane proteins. To determine whether these relationships might also have been valid in the warm surroundings where life may ...

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Equilibrium phase diagram of a randomly pinned glass-former [Physics]

02.06.2015 | Misaki Ozawa; Walter Kob; Atsushi Ikeda; Kunimasa Miyazaki, Proceedings of the National Academy of Sciences current issue, 2015

We use computer simulations to study the thermodynamic properties of a glass-former in which a fraction c of the particles has been permanently frozen. By thermodynamic integration, we determine the Kauzmann, or ideal glass transition, temperature TK(c) at which the configurational entropy ...

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Effect of warming temperatures on US wheat yields [Economic Sciences]

02.06.2015 | Jesse Tack; Andrew Barkley; Lawton Lanier Nalley, Proceedings of the National Academy of Sciences current issue, 2015

Climate change is expected to increase future temperatures, potentially resulting in reduced crop production in many key production regions. Research quantifying the complex relationship between weather variables and wheat yields is rapidly growing, and recent advances have used a variety of ...

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Giant thermal spin-torque-assisted magnetic tunnel ȷunction switching [Physics]

26.05.2015 | Aakash Pushp; Timothy Phung; Charles Rettner; Brian P. Hughes; See-Hun Yang; Stuart S. P. Parkin, Proceedings of the National Academy of Sciences current issue, 2015

Spin-polarized charge currents induce magnetic tunnel junction (MTJ) switching by virtue of spin-transfer torque (STT). Recently, by taking advantage of the spin-dependent thermoelectric properties of magnetic materials, novel means of generating spin currents from temperature gradients, and ...

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Thermodynamics of formation of coffinite, USiO4 [Chemistry]

26.05.2015 | Xiaofeng Guo; Stéphanie Szenknect; Adel Mesbah; Sabrina Labs; Nicolas Clavier; Christophe Poinssot; Sergey V. Ushako ..., Proceedings of the National Academy of Sciences current issue, 2015

Coffinite, USiO4, is an important U(IV) mineral, but its thermodynamic properties are not well-constrained. In this work, two different coffinite samples were synthesized under hydrothermal conditions and purified from a mixture of products. The enthalpy of formation was obtained by ...

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Activation of the bacterial thermosensor DesK involves a serine zipper dimerization motif that is modulated by bilayer thickness [Biochemistry]

19.05.2015 | Larisa Estefanía Cybulski; Joost Ballering; Anastassiia Moussatova; Maria Eugenia Inda; Daniela B. Vazquez; Tsjerk A ..., Proceedings of the National Academy of Sciences current issue, 2015

DesK is a bacterial thermosensor protein involved in maintaining membrane fluidity in response to changes in environmental temperature. Most likely, the protein is activated by changes in membrane thickness, but the molecular mechanism of sensing and signaling is still poorly understood. Here we ...

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