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26.446 Aktuelle Fachpublikationen von Proceedings of the National Academy of Sciences

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Zero-field magnetic response functions in Landau levels [Physics]

11.07.2017 | Yang Gao; Qian Niu, Proceedings of the National Academy of Sciences current issue, 2017

We present a fresh perspective on the Landau level quantization rule; that is, by successively including zero-field magnetic response functions at zero temperature, such as zero-field magnetization and susceptibility, the Onsager’s rule can be corrected order by order. Such a perspective is ...

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Correction to Supporting Information for Mao et al., Disruption of quercetin metabolism by fungicide affects energy production in honey bees (Apis mellifera) [SI Corrections]

11.07.2017 | Proceedings of the National Academy of Sciences current issue, 2017

AGRICULTURAL SCIENCES Correction to Supporting Information for “Disruption of quercetin metabolism by fungicide affects energy production in honey bees (Apis mellifera),” by Wenfu Mao, Mary A. Schuler, and May R. Berenbaum, which appeared in issue 10, March 7, 2017, of Proc Natl Acad Sci USA ...

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Intact piRNA pathway prevents L1 mobilization in male meiosis [Genetics]

11.07.2017 | Simon J. Newkirk; Suman Lee; Fiorella C. Grandi; Valeriya Gaysinskaya; James M. Rosser; Nicole Vanden Berg; Cathryn ..., Proceedings of the National Academy of Sciences current issue, 2017

The PIWI-interacting RNA (piRNA) pathway is essential for retrotransposon silencing. In piRNA-deficient mice, L1-overexpressing male germ cells exhibit excessive DNA damage and meiotic defects. It remains unknown whether L1 expression simply highlights piRNA deficiency or actually drives the ...

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Confined in-fiber solidification and structural control of silicon and silicon-germanium microparticles [Applied Physical Sciences]

11.07.2017 | Alexander Gumennik; Etgar C. Levy; Benjamin Grena; Chong Hou; Michael Rein; Ayman F. Abouraddy; John D. Joannopoulos ..., Proceedings of the National Academy of Sciences current issue, 2017

Crystallization of microdroplets of molten alloys could, in principle, present a number of possible morphological outcomes, depending on the symmetry of the propagating solidification front and its velocity, such as axial or spherically symmetric species segregation. However, because of thermal ...

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Limitations and challenges of using Raman spectroscopy to detect the abiotic plant stress response [Biological Sciences]

11.07.2017 | Daming Dong; Chunjiang Zhao, Proceedings of the National Academy of Sciences current issue, 2017

Altangerel et al. (1) suggest that Raman spectroscopy can be used to detect the early abiotic stress response in plants through the measurement of anthocyanins and carotenoids in plant tissues. However, we believe there are some problems that need to be considered. First, there is insufficient ...

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Exploiting the synthetic lethality between terminal respiratory oxidases to kill Mycobacterium tuberculosis and clear host infection [Microbiology]

11.07.2017 | Nitin P. Kalia; Erik J. Hasenoehrl; Nurlilah B. Ab Rahman; Vanessa H. Koh; Michelle L. T. Ang; Dannah R. Sajorda; Ki ..., Proceedings of the National Academy of Sciences current issue, 2017

The recent discovery of small molecules targeting the cytochrome bc1:aa3 in Mycobacterium tuberculosis triggered interest in the terminal respiratory oxidases for antituberculosis drug development. The mycobacterial cytochrome bc1:aa3 consists of a menaquinone:cytochrome c reductase (bc1) and a ...

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Protect coastal wetlands in China to save endangered migratory birds [Biological Sciences]

11.07.2017 | Hong Yang; Mingguo Ma; Julian R. Thompson; Roger J. Flower, Proceedings of the National Academy of Sciences current issue, 2017

Evaluating the significance of protected areas for biodiversity and ecosystem services is important for nature conservation. In a recent issue of PNAS, Xu et al. (1) present valuable information on provision of biodiversity and ecosystem services by China’s nature reserves. They conclude that ...

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Simulating tactile signals from the whole hand with millisecond precision [Neuroscience]

11.07.2017 | Hannes P. Saal; Benoit P. Delhaye; Brandon C. Rayhaun; Sliman J. Bensmaia, Proceedings of the National Academy of Sciences current issue, 2017

When we grasp and manipulate an object, populations of tactile nerve fibers become activated and convey information about the shape, size, and texture of the object and its motion across the skin. The response properties of tactile fibers have been extensively characterized in single-unit ...

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Transmembrane features governing Fc receptor CD16A assembly with CD16A signaling adaptor molecules [Immunology and Inflammation]

11.07.2017 | Alfonso Blázquez-Moreno; Soohyung Park; Wonpil Im; Melissa J. Call; Matthew E. Call; Hugh T. Reyburn, Proceedings of the National Academy of Sciences current issue, 2017

Many activating immunoreceptors associate with signaling adaptor molecules like FcεR1γ or CD247. FcεR1γ and CD247 share high sequence homology and form disulphide-linked homodimers that contain a pair of acidic aspartic acid residues in their transmembrane (TM) domains that mediate assembly, via ...

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Insect outbreak shifts the direction of selection from fast to slow growth rates in the long-lived conifer Pinus ponderosa [Evolution]

11.07.2017 | Raul de la Mata; Sharon Hood; Anna Sala, Proceedings of the National Academy of Sciences current issue, 2017

Long generation times limit species’ rapid evolution to changing environments. Trees provide critical global ecosystem services, but are under increasing risk of mortality because of climate change-mediated disturbances, such as insect outbreaks. The extent to which disturbance changes the ...

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