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  • 1
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    Nature Publishing Group (NPG)
    Publication Date: 2013-06-26
    Description: The paper described a novel technique for semen collection in large psittacines (patent pending), a procedure which was not routinely possible before. For the first time, a large set of semen samples is now available for analysis as well as for artificial insemination. Semen samples of more than 100 psittacine taxa were collected and analysed; data demonstrate large differences in the spermatological parameters between families, indicating an ecological relationship with breeding behaviour (polygamous versus monogamous birds). Using semen samples for artificial insemination resulted in the production of offspring in various families, such as Macaws and Cockatoos, for the first time ever. The present technique represents a breakthrough in species conservation programs and will enable future research into the ecology and environmental factors influencing endangered species. Scientific Reports 3 doi: 10.1038/srep02066
    Electronic ISSN: 2045-2322
    Topics: Natural Sciences in General
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  • 2
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    Nature Publishing Group (NPG)
    Publication Date: 2015-01-21
    Description: Article Surface redox centres in metal oxides play a key role in catalytic performance, and the conventional view is that the transition-metal cations dominate this behaviour. Here, the authors perform an in operando spectroscopic study, and find that oxygen anions are a significant redox partner to molecular oxygen. Nature Communications doi: 10.1038/ncomms7097 Authors: David N. Mueller, Michael L. Machala, Hendrik Bluhm, William C. Chueh
    Electronic ISSN: 2041-1723
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General , Physics
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  • 3
    Publication Date: 2015-12-16
    Description: Article Pertussis toxin is used extensively for perturbing Gαi/o pathways in the study of physiology and disease, but an equivalent inhibitor of Gαq signalling is not currently available to the research community. Here the authors characterize FR900359 as a specific Gq inhibitor and demonstrate its utility to dissect GPCR signalling and its potential to inhibit melanoma cells. Nature Communications doi: 10.1038/ncomms10156 Authors: Ramona Schrage, Anna-Lena Schmitz, Evelyn Gaffal, Suvi Annala, Stefan Kehraus, Daniela Wenzel, Katrin M. Büllesbach, Tobias Bald, Asuka Inoue, Yuji Shinjo, Ségolène Galandrin, Naveen Shridhar, Michael Hesse, Manuel Grundmann, Nicole Merten, Thomas H. Charpentier, Matthew Martz, Adrian J. Butcher, Tanja Slodczyk, Sylvain Armando, Maike Effern, Yoon Namkung, Laura Jenkins, Velten Horn, Anne Stößel, Harald Dargatz, Daniel Tietze, Diana Imhof, Céline Galés, Christel Drewke, Christa E. Müller, Michael Hölzel, Graeme Milligan, Andrew B. Tobin, Jesús Gomeza, Henrik G. Dohlman, John Sondek, T. Kendall Harden, Michel Bouvier, Stéphane A. Laporte, Junken Aoki, Bernd K. Fleischmann, Klaus Mohr, Gabriele M. König, Thomas Tüting, Evi Kostenis
    Electronic ISSN: 2041-1723
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General , Physics
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  • 4
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    Nature Publishing Group (NPG)
    In: Nature
    Publication Date: 2016-05-12
    Description: A rapid burst in hotspot motion through the interaction of tectonics and deep mantle flow Nature 533, 7602 (2016). doi:10.1038/nature17422 Authors: Rakib Hassan, R. Dietmar Müller, Michael Gurnis, Simon E. Williams & Nicolas Flament Volcanic hotspot tracks featuring linear progressions in the age of volcanism are typical surface expressions of plate tectonic movement on top of narrow plumes of hot material within Earth’s mantle. Seismic imaging reveals that these plumes can be of deep origin—probably rooted on thermochemical structures in the lower mantle. Although palaeomagnetic and radiometric age data suggest that mantle flow can advect plume conduits laterally, the flow dynamics underlying the formation of the sharp bend occurring only in the Hawaiian–Emperor hotspot track in the Pacific Ocean remains enigmatic. Here we present palaeogeographically constrained numerical models of thermochemical convection and demonstrate that flow in the deep lower mantle under the north Pacific was anomalously vigorous between 100 million years ago and 50 million years ago as a consequence of long-lasting subduction systems, unlike those in the south Pacific. These models show a sharp bend in the Hawaiian–Emperor hotspot track arising from the interplay of plume tilt and the lateral advection of plume sources. The different trajectories of the Hawaiian and Louisville hotspot tracks arise from asymmetric deformation of thermochemical structures under the Pacific between 100 million years ago and 50 million years ago. This asymmetric deformation waned just before the Hawaiian–Emperor bend developed, owing to flow in the deepest lower mantle associated with slab descent in the north and south Pacific.
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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