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36 Aktuelle Fachpublikationen zum Thema Addition

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[In Depth] Web billionaire bankrolls search for alien signals

24.07.2015 | Daniel Clery, Science , 2015

Are we alone in the universe? Russian internet entrepreneur Yuri Milner wants to know—and he's willing to pay for an answer. Milner has donated $100 million for a 10-year effort to detect signals from other civilizations in the universe, an effort that has drawn high-profile support from ...

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[Report] Exceptionally low daily energy expenditure in the bamboo-eating giant panda

10.07.2015 | Yonggang Nie; John R. Speakman; Qi Wu; Chenglin Zhang; Yibo Hu; Maohua Xia; Li Yan; Catherine Hambly; Lu Wang; Wei W ..., Science , 2015

The carnivoran giant panda has a specialized bamboo diet, to which its alimentary tract is poorly adapted. Measurements of daily energy expenditure across five captive and three wild pandas averaged 5.2 megajoules (MJ)/day, only 37.7% of the predicted value (13.8 MJ/day). For the wild pandas, the ...

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[Report] Gas phase observation and microwave spectroscopic characterization of formic sulfuric anhydride

03.07.2015 | Rebecca B. Mackenzie; Christopher T. Dewberry; Kenneth R. Leopold, Science , 2015

We report the observation of a covalently bound species, formic sulfuric anhydride (FSA), that is produced from formic acid and sulfur trioxide under supersonic jet conditions. FSA has been structurally characterized by means of microwave spectroscopy and further investigated by using density ...

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[Research Article] Integration of Bmp and Wnt signaling by Hopx specifies commitment of cardiomyoblasts

26.06.2015 | Rajan Jain; Deqiang Li; Mudit Gupta; Lauren J. Manderfield; Jamie L. Ifkovits; Qiaohong Wang; Feiyan Liu; Ying Liu; ..., Science , 2015

Cardiac progenitor cells are multipotent and give rise to cardiac endothelium, smooth muscle, and cardiomyocytes. Here, we define and characterize the cardiomyoblast intermediate that is committed to the cardiomyocyte fate, and we characterize the niche signals that regulate commitment. ...

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[Report] Recruitment of RNA polymerase II by the pioneer transcription factor PHA-4

19.06.2015 | H.‐T. Hsu; H.‐M. Chen; Z. Yang; J. Wang; N. K. Lee; A. Burger; K. Zaret; T. Liu; E. Levine; S. E. Mango, Science , 2015

Pioneer transcription factors initiate cell-fate changes by binding to silent target genes. They are among the first factors to bind key regulatory sites and facilitate chromatin opening. Here, we identify an additional role for pioneer factors. In early Caenorhabditis elegans foregut ...

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[Perspective] Slippery when dry

05.06.2015 | James Hone; Robert W. Carpick, Science , 2015

Friction and wear account for massive amounts of wasted energy annually (estimates run in the hundreds of billions of dollars in the United States), in addition to unwanted and even unsafe failures of vehicles, machines, and devices (1). For example, nearly one-third of a vehicle's fuel energy is ...

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[Review] Function-led design of new porous materials

29.05.2015 | Anna G. Slater; Andrew I. Cooper, Science , 2015

Porous solids are important as membranes, adsorbents, catalysts, and in other chemical applications. But for these materials to find greater use at an industrial scale, it is necessary to optimize multiple functions in addition to pore structure and surface area, such as stability, sorption ...

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[In Depth] Leaf bacteria fertilize trees, researchers claim

22.05.2015 | Elizabeth Pennisi, Science , 2015

One of the fastest growing trees, poplars, may rely on tiny microbes in their leaves to fuel their growth. For more than a decade, a lone researcher has been building a case for nitrogen fixation by bacteria living in poplar leaves. There have been many claims of nitrogen fixation in plants ...

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[Perspective] More than just bugs in spit

08.05.2015 | Clifton Barry, Science , 2015

The development of new drugs for tuberculosis (TB) is not for the faint of heart. In addition to all the typical hurdles to developing a new anti-infective, additional complications result from the complex pathology induced by the disease. Because the bacillus is surrounded by a thick, waxy coat, ...

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[Report] Creating and probing electron whispering-gallery modes in graphene

08.05.2015 | Yue Zhao; Jonathan Wyrick; Fabian D. Natterer; Joaquin F. Rodriguez-Nieva; Cyprian Lewandowski; Kenji Watanabe; Taka ..., Science , 2015

The design of high-finesse resonant cavities for electronic waves faces challenges due to short electron coherence lengths in solids. Complementing previous approaches to confine electronic waves by carefully positioned adatoms at clean metallic surfaces, we demonstrate an approach inspired by ...

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