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337 Aktuelle Fachpublikationen zum Thema temperature

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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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Signature properties of water: Their molecular electronic origins [Physics]

19.05.2015 | Vlad P. Sokhan; Andrew P. Jones; Flaviu S. Cipcigan; Jason Crain; Glenn J. Martyna, Proceedings of the National Academy of Sciences current issue, 2015

Water challenges our fundamental understanding of emergent materials properties from a molecular perspective. It exhibits a uniquely rich phenomenology including dramatic variations in behavior over the wide temperature range of the liquid into water’s crystalline phases and amorphous states. We ...

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Specific heat and sound velocity at the relevant competing phase of high-temperature superconductors [Physics]

19.05.2015 | Chandra M. Varma; Lijun Zhu, Proceedings of the National Academy of Sciences current issue, 2015

Recent highly accurate sound velocity measurements reveal a phase transition to a competing phase in YBa2Cu3O6+δ that is not identified in available specific heat measurements. We show that this signature is consistent with the universality class of the loop current-ordered state when the ...

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Molecular singlet fission in pentacene dimers [Chemistry]

28.04.2015 | Johannes Zirzlmeier; Dan Lehnherr; Pedro B. Coto; Erin T. Chernick; Rubén Casillas; Bettina S. Basel; Michael Thoss; ..., Proceedings of the National Academy of Sciences current issue, 2015

Singlet fission (SF) has the potential to supersede the traditional solar energy conversion scheme by means of boosting the photon-to-current conversion efficiencies beyond the 30% Shockley–Queisser limit. Here, we show unambiguous and compelling evidence for unprecedented intramolecular SF ...

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Plant nanobionic materials with a giant temperature response mediated by pectin-Ca2+ [Plant Biology]

14.04.2015 | Raffaele Di Giacomo; Chiara Daraio; Bruno Maresca, Proceedings of the National Academy of Sciences current issue, 2015

Conventional approaches to create biomaterials rely on reverse engineering of biological structures, on biomimicking, and on bioinspiration. Plant nanobionics is a recent approach to engineer new materials combining plant organelles with synthetic nanoparticles to enhance, for example, ...

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Reply to Liu et al.: Loss of TGF-{beta} signaling in CARASIL pathogenesis [Biological Sciences]

07.04.2015 | Nathalie Beaufort; Eva Scharrer; Vanda Lux; Michael Ehrmann; Christof Haffner; Martin Dichgans, Proceedings of the National Academy of Sciences current issue, 2015

We thank Liu et al. (1) for their comments on our work on the link between the cerebral autosomal recessive arteriopathy with subcortical infarcts and leukoencephalopathy (CARASIL)-related protease high temperature requirement protein A1 (HtrA1) and the TGF-β signaling pathway. To advance our ...

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Loss of HtrA1-induced attenuation of TGF-{beta} signaling in fibroblasts might not be the main mechanism of CARASIL pathogenesis [Biological Sciences]

07.04.2015 | Ju Liu; Fengyun Dong; Josephine Hoh, Proceedings of the National Academy of Sciences current issue, 2015

In their contribution to PNAS, Beaufort et al. demonstrate that high temperature requirement protein A1 (HtrA1) facilitates TGF-β signaling through processing latent TGF-β binding protein 1 (LTBP-1) (1). Then the authors suggest the down-regulation of TGF-β signaling by lack of HtrA1-mediated ...

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Toward a mineral physics reference model for the Moon's core [Earth, Atmospheric, and Planetary Sciences]

31.03.2015 | Daniele Antonangeli; Guillaume Morard; Nicholas C. Schmerr; Tetsuya Komabayashi; Michael Krisch; Guillaume Fiquet; Y ..., Proceedings of the National Academy of Sciences current issue, 2015

The physical properties of iron (Fe) at high pressure and high temperature are crucial for understanding the chemical composition, evolution, and dynamics of planetary interiors. Indeed, the inner structures of the telluric planets all share a similar layered nature: a central metallic core ...

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Anthropogenic warming has increased drought risk in California [Sustainability Science]

31.03.2015 | Noah S. Diffenbaugh; Daniel L. Swain; Danielle Touma, Proceedings of the National Academy of Sciences current issue, 2015

California is currently in the midst of a record-setting drought. The drought began in 2012 and now includes the lowest calendar-year and 12-mo precipitation, the highest annual temperature, and the most extreme drought indicators on record. The extremely warm and dry conditions have led to acute ...

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Allelic polymorphism of GIGANTEA is responsible for naturally occurring variation in circadian period in Brassica rapa [Plant Biology]

24.03.2015 | Qiguang Xie; Ping Lou; Victor Hermand; Rashid Aman; Hee Jin Park; Dae-Jin Yun; Woe Yeon Kim; Matti Juhani Salmela; B ..., Proceedings of the National Academy of Sciences current issue, 2015

GIGANTEA (GI) was originally identified by a late-flowering mutant in Arabidopsis, but subsequently has been shown to act in circadian period determination, light inhibition of hypocotyl elongation, and responses to multiple abiotic stresses, including tolerance to high salt and cold (freezing) ...

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