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385 Aktuelle Fachpublikationen zum Thema temperature

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Species interactions slow warming-induced upward shifts of treelines on the Tibetan Plateau [Ecology]

19.04.2016 | Eryuan Liang; Yafeng Wang; Shilong Piao; Xiaoming Lu; Jesús Julio Camarero; Haifeng Zhu; Liping Zhu; Aaron M. Elliso ..., Proceedings of the National Academy of Sciences current issue, 2016

The alpine treeline is commonly regarded as being sensitive to climatic warming because regeneration and growth of trees at treeline generally are limited by low temperature. The alpine treelines of the Tibetan Plateau (TP) occur at the highest elevations (4,900 m above sea level) in the Northern ...

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Kinetic selection vs. free energy of DNA base pairing in control of polymerase fidelity [Biochemistry]

19.04.2016 | Keriann Oertell; Emily M. Harcourt; Michael G. Mohsen; John Petruska; Eric T. Kool; Myron F. Goodman, Proceedings of the National Academy of Sciences current issue, 2016

What is the free energy source enabling high-fidelity DNA polymerases (pols) to favor incorporation of correct over incorrect base pairs by 103- to 104-fold, corresponding to free energy differences of ΔΔGinc ∼ 5.5–7 kcal/mol? Standard ΔΔG° values (∼0.3 kcal/mol) calculated from melting ...

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Ancestral genetic diversity associated with the rapid spread of stress-tolerant coral symbionts in response to Holocene climate change [Evolution]

19.04.2016 | Benjamin C. C. Hume; Christian R. Voolstra; Chatchanit Arif; Cecilia D’Angelo; John A. Burt; Gal Eyal; Yossi Loya; J ..., Proceedings of the National Academy of Sciences current issue, 2016

Coral communities in the Persian/Arabian Gulf (PAG) withstand unusually high salinity levels and regular summer temperature maxima of up to ∼35 °C that kill conspecifics elsewhere. Due to the recent formation of the PAG and its subsequent shift to a hot climate, these corals have had ...

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Accumulation of formamide in hydrothermal pores to form prebiotic nucleobases [Earth, Atmospheric, and Planetary Sciences]

19.04.2016 | Doreen Niether; Dzmitry Afanasenkau; Jan K. G. Dhont; Simone Wiegand, Proceedings of the National Academy of Sciences current issue, 2016

Formamide is one of the important compounds from which prebiotic molecules can be synthesized, provided that its concentration is sufficiently high. For nucleotides and short DNA strands, it has been shown that a high degree of accumulation in hydrothermal pores occurs, so that temperature ...

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Reply to Yu et al.: Global temperature change as the ultimate driver of the shift in the summer monsoon rain belt in East Asia [Physical Sciences]

19.04.2016 | Shiling Yang; Zhongli Ding; Yangyang Li; Xu Wang; Wenying Jiang; Xiaofang Huang, Proceedings of the National Academy of Sciences current issue, 2016

In reference to our recent paper (1), Yu et al. (2) maintain that (i) increased anthropogenic aerosols caused a weakening of the East Asian summer monsoon (EASM) over the past few decades, together with a concomitant “southern-flood-northern-drought” (SFND) pattern in China, and (ii) our finding ...

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Electric field-induced superconducting transition of insulating FeSe thin film at 35 K [Physics]

12.04.2016 | Kota Hanzawa; Hikaru Sato; Hidenori Hiramatsu; Toshio Kamiya; Hideo Hosono, Proceedings of the National Academy of Sciences current issue, 2016

It is thought that strong electron correlation in an insulating parent phase would enhance a critical temperature (Tc) of superconductivity in a doped phase via enhancement of the binding energy of a Cooper pair as known in high-Tc cuprates. To induce a superconductor transition in an insulating ...

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DELAY OF GERMINATION1 (DOG1) regulates both seed dormancy and flowering time through microRNA pathways [Plant Biology]

12.04.2016 | Heqiang Huo; Shouhui Wei; Kent J. Bradford, Proceedings of the National Academy of Sciences current issue, 2016

Seed germination and flowering, two critical developmental transitions in plant life cycles, are coordinately regulated by genetic and environmental factors to match plant establishment and reproduction to seasonal cues. The DELAY OF GERMINATION1 (DOG1) gene is involved in regulating seed ...

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Convergence in the temperature response of leaf respiration across biomes and plant functional types [Ecology]

05.04.2016 | Mary A. Heskel; Odhran S. O’Sullivan; Peter B. Reich; Mark G. Tjoelker; Lasantha K. Weerasinghe; Aurore Penillard; J ..., Proceedings of the National Academy of Sciences current issue, 2016

Plant respiration constitutes a massive carbon flux to the atmosphere, and a major control on the evolution of the global carbon cycle. It therefore has the potential to modulate levels of climate change due to the human burning of fossil fuels. Neither current physiological nor terrestrial ...

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Energy landscape in protein folding and unfolding [Biophysics and Computational Biology]

22.03.2016 | Francesco Mallamace; Carmelo Corsaro; Domenico Mallamace; Sebastiano Vasi; Cirino Vasi; Piero Baglioni; Sergey V. Bu ..., Proceedings of the National Academy of Sciences current issue, 2016

We use 1H NMR to probe the energy landscape in the protein folding and unfolding process. Using the scheme ⇄ reversible unfolded (intermediate) → irreversible unfolded (denatured) state, we study the thermal denaturation of hydrated lysozyme that occurs when the temperature is increased. Using ...

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Pressure-induced superconductivity in a three-dimensional topological material ZrTe5 [Physics]

15.03.2016 | Yonghui Zhou; Juefei Wu; Wei Ning; Nana Li; Yongping Du; Xuliang Chen; Ranran Zhang; Zhenhua Chi; Xuefei Wang; Xiang ..., Proceedings of the National Academy of Sciences current issue, 2016

As a new type of topological materials, ZrTe5 shows many exotic properties under extreme conditions. Using resistance and ac magnetic susceptibility measurements under high pressure, while the resistance anomaly near 128 K is completely suppressed at 6.2 GPa, a fully superconducting transition ...

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