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303 Aktuelle Fachpublikationen zum Thema temperature

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Recent climate and air pollution impacts on Indian agriculture [Sustainability Science]

18.11.2014 | Jennifer Burney; V. Ramanathan, Proceedings of the National Academy of Sciences current issue, 2014

Recent research on the agricultural impacts of climate change has primarily focused on the roles of temperature and precipitation. These studies show that India has already been negatively affected by recent climate trends. However, anthropogenic climate changes are a result of both global ...

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Cerebral small vessel disease-related protease HtrA1 processes latent TGF-{beta} binding protein 1 and facilitates TGF-{beta} signaling [Medical Sciences]

18.11.2014 | Nathalie Beaufort; Eva Scharrer; Elisabeth Kremmer; Vanda Lux; Michael Ehrmann; Robert Huber; Henry Houlden; David W ..., Proceedings of the National Academy of Sciences current issue, 2014

High temperature requirement protein A1 (HtrA1) is a primarily secreted serine protease involved in a variety of cellular processes including transforming growth factor β (TGF-β) signaling. Loss of its activity causes cerebral autosomal recessive arteriopathy with subcortical infarcts and ...

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Days to heading 7, a major quantitative locus determining photoperiod sensitivity and regional adaptation in rice [Agricultural Sciences]

18.11.2014 | He Gao; Mingna Jin; Xiao-Ming Zheng; Jun Chen; Dingyang Yuan; Yeyun Xin; Maoqing Wang; Dongyi Huang; Zhe Zhang; Kunn ..., Proceedings of the National Academy of Sciences current issue, 2014

Success of modern agriculture relies heavily on breeding of crops with maximal regional adaptability and yield potentials. A major limiting factor for crop cultivation is their flowering time, which is strongly regulated by day length (photoperiod) and temperature. Here we report identification ...

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Part-crystalline part-liquid state and rattling-like thermal damping in materials with chemical-bond hierarchy [Physics]

21.10.2014 | Wujie Qiu; Lili Xi; Ping Wei; Xuezhi Ke; Jihui Yang; Wenqing Zhang, Proceedings of the National Academy of Sciences current issue, 2014

Understanding thermal and phonon transport in solids has been of great importance in many disciplines such as thermoelectric materials, which usually requires an extremely low lattice thermal conductivity (LTC). By analyzing the finite-temperature structural and vibrational characteristics of ...

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Caenorhabditis elegans RSD-2 and RSD-6 promote germ cell immortality by maintaining small interfering RNA populations [Genetics]

14.10.2014 | Aisa Sakaguchi; Peter Sarkies; Matt Simon; Anna-Lisa Doebley; Leonard D. Goldstein; Ashley Hedges; Kohta Ikegami; St ..., Proceedings of the National Academy of Sciences current issue, 2014

Germ cells are maintained in a pristine non-aging state as they proliferate over generations. Here, we show that a novel function of the Caenorhabditis elegans RNA interference proteins RNAi spreading defective (RSD)-2 and RSD-6 is to promote germ cell immortality at high temperature. rsd mutants ...

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In This Issue [This Week in PNAS]

14.10.2014 | Proceedings of the National Academy of Sciences current issue, 2014

Rapid transitions in viral DNA packing during infection Top view (Left and Center) and side view (Right) schematics of encapsidated DNA transitions with increasing temperature. Viral replication can begin only after a virus successfully ejects its genome into a host cell. To investigate how a ...

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Scaling description of the yielding transition in soft amorphous solids at zero temperature [Physics]

07.10.2014 | Jie Lin; Edan Lerner; Alberto Rosso; Matthieu Wyart, Proceedings of the National Academy of Sciences current issue, 2014

Yield stress materials flow if a sufficiently large shear stress is applied. Although such materials are ubiquitous and relevant for industry, there is no accepted microscopic description of how they yield, even in the simplest situations in which temperature is negligible and in which flow ...

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Atmospheric controls on northeast Pacific temperature variability and change, 1900-2012 [Earth, Atmospheric, and Planetary Sciences]

07.10.2014 | James A. Johnstone; Nathan J. Mantua, Proceedings of the National Academy of Sciences current issue, 2014

Over the last century, northeast Pacific coastal sea surface temperatures (SSTs) and land-based surface air temperatures (SATs) display multidecadal variations associated with the Pacific Decadal Oscillation, in addition to a warming trend of ∼0.5–1 °C. Using independent records of sea-level ...

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FBH1 affects warm temperature responses in the Arabidopsis circadian clock [Plant Biology]

07.10.2014 | Dawn H. Nagel; Jose L. Pruneda-Paz; Steve A. Kay, Proceedings of the National Academy of Sciences current issue, 2014

In Arabidopsis, the circadian clock allows the plant to coordinate daily external signals with internal processes, conferring enhanced fitness and growth vigor. Although external cues such as temperature can entrain the clock, an important feature of the clock is the ability to maintain a ...

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Requirements and limits for life in the context of exoplanets [Astronomy]

02.09.2014 | Christopher P. McKay, Proceedings of the National Academy of Sciences current issue, 2014

The requirements for life on Earth, its elemental composition, and its environmental limits provide a way to assess the habitability of exoplanets. Temperature is key both because of its influence on liquid water and because it can be directly estimated from orbital and climate models of ...

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