TY - JOUR A1 - Chipman, Ariel D. A1 - Ferrier, David E. K. A1 - Brena, Carlo A1 - Qu, Jiaxin A1 - Hughes, Daniel S. T. A1 - Schroeder, Reinhard A1 - Torres-Oliva, Montserrat A1 - Znassi, Nadia A1 - Jiang, Huaiyang A1 - Almeida, Francisca C. A1 - Alonso, Claudio R. A1 - Apostolou, Zivkos A1 - Aqrawi, Peshtewani A1 - Arthur, Wallace A1 - Barna, Jennifer C. J. A1 - Blankenburg, Kerstin P. A1 - Brites, Daniela A1 - Capella-Gutierrez, Salvador A1 - Coyle, Marcus A1 - Dearden, Peter K. A1 - Du Pasquier, Louis A1 - Duncan, Elizabeth J. A1 - Ebert, Dieter A1 - Eibner, Cornelius A1 - Erikson, Galina A1 - Evans, Peter D. A1 - Extavour, Cassandra G. A1 - Francisco, Liezl A1 - Gabaldon, Toni A1 - Gillis, William J. A1 - Goodwin-Horn, Elizabeth A. A1 - Green, Jack E. A1 - Griffiths-Jones, Sam A1 - Grimmelikhuijzen, Cornelis J. P. A1 - Gubbala, Sai A1 - Guigo, Roderic A1 - Han, Yi A1 - Hauser, Frank A1 - Havlak, Paul A1 - Hayden, Luke A1 - Helbing, Sophie A1 - Holder, Michael A1 - Hui, Jerome H. L. A1 - Hunn, Julia P. A1 - Hunnekuhl, Vera S. A1 - Jackson, LaRonda A1 - Javaid, Mehwish A1 - Jhangiani, Shalini N. A1 - Jiggins, Francis M. A1 - Jones, Tamsin E. A1 - Kaiser, Tobias S. A1 - Kalra, Divya A1 - Kenny, Nathan J. A1 - Korchina, Viktoriya A1 - Kovar, Christie L. A1 - Kraus, F. Bernhard A1 - Lapraz, Francois A1 - Lee, Sandra L. A1 - Lv, Jie A1 - Mandapat, Christigale A1 - Manning, Gerard A1 - Mariotti, Marco A1 - Mata, Robert A1 - Mathew, Tittu A1 - Neumann, Tobias A1 - Newsham, Irene A1 - Ngo, Dinh N. A1 - Ninova, Maria A1 - Okwuonu, Geoffrey A1 - Ongeri, Fiona A1 - Palmer, William J. A1 - Patil, Shobha A1 - Patraquim, Pedro A1 - Pham, Christopher A1 - Pu, Ling-Ling A1 - Putman, Nicholas H. A1 - Rabouille, Catherine A1 - Ramos, Olivia Mendivil A1 - Rhodes, Adelaide C. A1 - Robertson, Helen E. A1 - Robertson, Hugh M. A1 - Ronshaugen, Matthew A1 - Rozas, Julio A1 - Saada, Nehad A1 - Sanchez-Gracia, Alejandro A1 - Scherer, Steven E. A1 - Schurko, Andrew M. A1 - Siggens, Kenneth W. A1 - Simmons, DeNard A1 - Stief, Anna A1 - Stolle, Eckart A1 - Telford, Maximilian J. A1 - Tessmar-Raible, Kristin A1 - Thornton, Rebecca A1 - van der Zee, Maurijn A1 - von Haeseler, Arndt A1 - Williams, James M. A1 - Willis, Judith H. A1 - Wu, Yuanqing A1 - Zou, Xiaoyan A1 - Lawson, Daniel A1 - Muzny, Donna M. A1 - Worley, Kim C. A1 - Gibbs, Richard A. A1 - Akam, Michael A1 - Richards, Stephen T1 - The first myriapod genome sequence reveals conservative arthropod gene content and genome organisation in the centipede Strigamia maritima JF - PLoS biology N2 - Myriapods (e. g., centipedes and millipedes) display a simple homonomous body plan relative to other arthropods. All members of the class are terrestrial, but they attained terrestriality independently of insects. Myriapoda is the only arthropod class not represented by a sequenced genome. We present an analysis of the genome of the centipede Strigamia maritima. It retains a compact genome that has undergone less gene loss and shuffling than previously sequenced arthropods, and many orthologues of genes conserved from the bilaterian ancestor that have been lost in insects. Our analysis locates many genes in conserved macro-synteny contexts, and many small-scale examples of gene clustering. We describe several examples where S. maritima shows different solutions from insects to similar problems. The insect olfactory receptor gene family is absent from S. maritima, and olfaction in air is likely effected by expansion of other receptor gene families. For some genes S. maritima has evolved paralogues to generate coding sequence diversity, where insects use alternate splicing. This is most striking for the Dscam gene, which in Drosophila generates more than 100,000 alternate splice forms, but in S. maritima is encoded by over 100 paralogues. We see an intriguing linkage between the absence of any known photosensory proteins in a blind organism and the additional absence of canonical circadian clock genes. The phylogenetic position of myriapods allows us to identify where in arthropod phylogeny several particular molecular mechanisms and traits emerged. For example, we conclude that juvenile hormone signalling evolved with the emergence of the exoskeleton in the arthropods and that RR-1 containing cuticle proteins evolved in the lineage leading to Mandibulata. We also identify when various gene expansions and losses occurred. The genome of S. maritima offers us a unique glimpse into the ancestral arthropod genome, while also displaying many adaptations to its specific life history. Y1 - 2014 U6 - https://doi.org/10.1371/journal.pbio.1002005 SN - 1545-7885 VL - 12 IS - 11 PB - PLoS CY - San Fransisco ER - TY - JOUR A1 - Rienks, Emile D. L. A1 - Wimmer, S. A1 - Sanchez-Barriga, Jaime A1 - Caha, O. A1 - Mandal, Partha Sarathi A1 - Ruzicka, J. A1 - Ney, A. A1 - Steiner, H. A1 - Volobuev, V. V. A1 - Groiss, H. A1 - Albu, M. A1 - Kothleitner, G. A1 - Michalicka, J. A1 - Khan, S. A. A1 - Minar, J. A1 - Ebert, H. A1 - Bauer, G. A1 - Freyse, Friedrich A1 - Varykhalov, Andrei A1 - Rader, Oliver A1 - Springholz, Gunther T1 - Large magnetic gap at the Dirac point in Bi2Te3/MnBi2Te4 heterostructures JF - Nature : the international weekly journal of science N2 - Magnetically doped topological insulators enable the quantum anomalous Hall effect (QAHE), which provides quantized edge states for lossless charge-transport applications(1-8). The edge states are hosted by a magnetic energy gap at the Dirac point(2), but hitherto all attempts to observe this gap directly have been unsuccessful. Observing the gap is considered to be essential to overcoming the limitations of the QAHE, which so far occurs only at temperatures that are one to two orders of magnitude below the ferromagnetic Curie temperature, T-C (ref. (8)). Here we use low-temperature photoelectron spectroscopy to unambiguously reveal the magnetic gap of Mn-doped Bi2Te3, which displays ferromagnetic out-of-plane spin texture and opens up only below T-C. Surprisingly, our analysis reveals large gap sizes at 1 kelvin of up to 90 millielectronvolts, which is five times larger than theoretically predicted(9). Using multiscale analysis we show that this enhancement is due to a remarkable structure modification induced by Mn doping: instead of a disordered impurity system, a self-organized alternating sequence of MnBi2Te4 septuple and Bi2Te3 quintuple layers is formed. This enhances the wavefunction overlap and size of the magnetic gap(10). Mn-doped Bi2Se3 (ref. (11)) and Mn-doped Sb2Te3 form similar heterostructures, but for Bi2Se3 only a nonmagnetic gap is formed and the magnetization is in the surface plane. This is explained by the smaller spin-orbit interaction by comparison with Mn-doped Bi2Te3. Our findings provide insights that will be crucial in pushing lossless transport in topological insulators towards room-temperature applications. Y1 - 2019 U6 - https://doi.org/10.1038/s41586-019-1826-7 SN - 0028-0836 SN - 1476-4687 VL - 576 IS - 7787 SP - 423 EP - 428 PB - Nature Publ. Group CY - London ER - TY - JOUR A1 - Arridge, Christopher S. A1 - Achilleos, N. A1 - Agarwal, Jessica A1 - Agnor, C. B. A1 - Ambrosi, R. A1 - Andre, N. A1 - Badman, S. V. A1 - Baines, K. A1 - Banfield, D. A1 - Barthelemy, M. A1 - Bisi, M. M. A1 - Blum, J. A1 - Bocanegra-Bahamon, T. A1 - Bonfond, B. A1 - Bracken, C. A1 - Brandt, P. A1 - Briand, C. A1 - Briois, C. A1 - Brooks, S. A1 - Castillo-Rogez, J. A1 - Cavalie, T. A1 - Christophe, B. A1 - Coates, Andrew J. A1 - Collinson, G. A1 - Cooper, John F. A1 - Costa-Sitja, M. A1 - Courtin, R. A1 - Daglis, I. A. A1 - De Pater, Imke A1 - Desai, M. A1 - Dirkx, D. A1 - Dougherty, M. K. A1 - Ebert, R. W. A1 - Filacchione, Gianrico A1 - Fletcher, Leigh N. A1 - Fortney, J. A1 - Gerth, I. A1 - Grassi, D. A1 - Grodent, D. A1 - GrĂ¼n, Eberhard A1 - Gustin, J. A1 - Hedman, M. A1 - Helled, R. A1 - Henri, P. A1 - Hess, Sebastien A1 - Hillier, J. K. A1 - Hofstadter, M. H. A1 - Holme, R. A1 - Horanyi, M. A1 - Hospodarsky, George B. A1 - Hsu, S. A1 - Irwin, P. A1 - Jackman, C. M. A1 - Karatekin, O. A1 - Kempf, Sascha A1 - Khalisi, E. A1 - Konstantinidis, K. A1 - Kruger, H. A1 - Kurth, William S. A1 - Labrianidis, C. A1 - Lainey, V. A1 - Lamy, L. L. A1 - Laneuville, Matthieu A1 - Lucchesi, D. A1 - Luntzer, A. A1 - MacArthur, J. A1 - Maier, A. A1 - Masters, A. A1 - McKenna-Lawlor, S. A1 - Melin, H. A1 - Milillo, A. A1 - Moragas-Klostermeyer, Georg A1 - Morschhauser, Achim A1 - Moses, J. I. A1 - Mousis, O. A1 - Nettelmann, N. A1 - Neubauer, F. M. A1 - Nordheim, T. A1 - Noyelles, B. A1 - Orton, G. S. A1 - Owens, Mathew A1 - Peron, R. A1 - Plainaki, C. A1 - Postberg, F. A1 - Rambaux, N. A1 - Retherford, K. A1 - Reynaud, Serge A1 - Roussos, Elias A1 - Russell, C. T. A1 - Rymer, Am. A1 - Sallantin, R. A1 - Sanchez-Lavega, A. A1 - Santolik, O. A1 - Saur, J. A1 - Sayanagi, Km. A1 - Schenk, P. A1 - Schubert, J. A1 - Sergis, N. A1 - Sittler, E. C. A1 - Smith, A. A1 - Spahn, Frank A1 - Srama, Ralf A1 - Stallard, T. A1 - Sterken, V. A1 - Sternovsky, Zoltan A1 - Tiscareno, M. A1 - Tobie, G. A1 - Tosi, F. A1 - Trieloff, M. A1 - Turrini, D. A1 - Turtle, E. P. A1 - Vinatier, S. A1 - Wilson, R. A1 - Zarkat, P. T1 - The science case for an orbital mission to Uranus: Exploring the origins and evolution of ice giant planets JF - Planetary and space science N2 - Giant planets helped to shape the conditions we see in the Solar System today and they account for more than 99% of the mass of the Sun's planetary system. They can be subdivided into the Ice Giants (Uranus and Neptune) and the Gas Giants (Jupiter and Saturn), which differ from each other in a number of fundamental ways. Uranus, in particular is the most challenging to our understanding of planetary formation and evolution, with its large obliquity, low self-luminosity, highly asymmetrical internal field, and puzzling internal structure. Uranus also has a rich planetary system consisting of a system of inner natural satellites and complex ring system, five major natural icy satellites, a system of irregular moons with varied dynamical histories, and a highly asymmetrical magnetosphere. Voyager 2 is the only spacecraft to have explored Uranus, with a flyby in 1986, and no mission is currently planned to this enigmatic system. However, a mission to the uranian system would open a new window on the origin and evolution of the Solar System and would provide crucial information on a wide variety of physicochemical processes in our Solar System. These have clear implications for understanding exoplanetary systems. In this paper we describe the science case for an orbital mission to Uranus with an atmospheric entry probe to sample the composition and atmospheric physics in Uranus' atmosphere. The characteristics of such an orbiter and a strawman scientific payload are described and we discuss the technical challenges for such a mission. This paper is based on a white paper submitted to the European Space Agency's call for science themes for its large-class mission programme in 2013. KW - Uranus KW - Magnetosphere KW - Atmosphere KW - Natural satellites KW - Rings KW - Planetary interior Y1 - 2014 U6 - https://doi.org/10.1016/j.pss.2014.08.009 SN - 0032-0633 VL - 104 SP - 122 EP - 140 PB - Elsevier CY - Oxford ER - TY - JOUR A1 - Ebert, Thomas A1 - Trauth, Martin H. T1 - Semi-automated detection of annual laminae (varves) in lake sediments using a fuzzy logic algorithm JF - Palaeogeography, palaeoclimatology, palaeoecology : an international journal for the geo-sciences N2 - Annual laminae (varves) in lake sediments are typically visually identified, measured and counted, although numerous attempts have been made to automate this process. The reason for the failure of most of these automated algorithms for varve counting is the complexity of the seasonal laminations, typically rich in lateral fades variations and internal heterogeneities. In the manual counting of varves, the investigator acquired and interpreted flexible numbers of complex decision criteria to understand whether a particular simple lamination is a varve or not. Fuzzy systems simulate the flexible decision making process in a computer by introducing a smooth transition between true varve and false varve. In our investigation, we use an adaptive neuro fuzzy inference system (ANFIS) to detect varves on the basis of a digital image of the sediment. The results of the application of the ANFIS to laminated sediments from the Meerfelder Maar (Eifel, Germany) and from a landslide-dammed lake in the Quebrada de Cafayate of Argentina are compared with manual varve counts and possible reasons for the differences are discussed. (C) 2015 Elsevier B.V. All rights reserved. KW - Varve KW - Lake sediment KW - Image processing KW - Fuzzy logic KW - MATLAB KW - Statistics Y1 - 2015 U6 - https://doi.org/10.1016/j.palaeo.2015.05.024 SN - 0031-0182 SN - 1872-616X VL - 435 SP - 272 EP - 282 PB - Elsevier CY - Amsterdam ER - TY - JOUR A1 - Witt, B. A1 - Bornhorst, Julia A1 - Mitze, H. A1 - Ebert, Franziska A1 - Meyer, S. A1 - Francesconi, Kevin A. A1 - Schwerdtle, Tanja T1 - Arsenolipids exert less toxicity in a human neuron astrocyte co-culture as compared to the respective monocultures JF - Metallomics : integrated biometal science N2 - Arsenic-containing hydrocarbons (AsHCs), natural products found in seafood, have recently been shown to exert toxic effects in human neurons. In this study we assessed the toxicity of three AsHCs in cultured human astrocytes. Due to the high cellular accessibility and substantial toxicity observed astrocytes were identified as further potential brain target cells for arsenolipids. Thereby, the AsHCs exerted a 5-19-fold higher cytotoxicity in astrocytes as compared to arsenite. Next we compared the toxicity of the arsenicals in a co-culture model of the respective human astrocytes and neurons. Notably the AsHCs did not show any substantial toxic effects in the co-culture, while arsenite did. The arsenic accessibility studies indicated that in the co-culture astrocytes protect neurons against cellular arsenic accumulation especially after incubation with arsenolipids. In summary, these data underline the importance of the glial-neuron interaction when assessing the in vitro neurotoxicity of new unclassified metal species. Y1 - 2017 U6 - https://doi.org/10.1039/c7mt00036g SN - 1756-5901 SN - 1756-591X VL - 9 SP - 442 EP - 446 PB - Royal Society of Chemistry CY - Cambridge ER -