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University of Vienna Phaidra (215.976 recursos)

Is a publication service run by the University of Vienna. It is an institutional repository whose aim is to collect and present the research results of university staff. This includes journal articles and monographs as well as congress and working papers. In principle it is possible to use u:scholar to also archive research data.

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Mostrando recursos 1 - 20 de 239

  1. Shifts in species richness, herbivore specialization, and plant resistance along elevation gradients

    Pellissier, Loïc; Department of Ecology and Evolution, University of Lausanne; Fiedler, Konrad; Department fur Botanik und Biodiversitatsforschung, Fakultat fur Lebenswissenschaften, University of Vienna; Department fur Botanik und Biodiversitatsforschung, Fakultat fur Lebenswissenschaften, University of Vienna; Ndribe, Charlotte; Department of Ecology and Evolution, University of Lausanne; Dubuis, Anne; Department of Ecology and Evolution, University of Lausanne; Pradervand, Jean-Nicolas; Department of Ecology and Evolution, University of Lausanne; Guisan, Antoine; Department of Ecology and Evolution, University of Lausanne; Rasmann, Sergio; Department of Ecology and Evolution, University of Lausanne

  2. Spatial and temporal determinants of genetic structure in Gentianella bohemica

    Königer, Julia; Faculty of Agricultural Sciences and Landscape Architecture, University of Applied Sciences Osnabrück; Rebernig, Carolin A.; Department of Plant Biology and Forest Genetics, Swedish University of Agricultural Sciences; Brabec, Jiří; Muzeum Cheb; Kiehl, Kathrin; Faculty of Agricultural Sciences and Landscape Architecture, University of Applied Sciences Osnabrück; Greimler, Josef; Department fur Botanik und Biodiversitatsforschung, Fakultat fur Lebenswissenschaften, University of Vienna; Department fur Botanik und Biodiversitatsforschung, Fakultat fur Lebenswissenschaften, University of Vienna

  3. Carnap’s Non-Cognitivism as an Alternative to Both Value-Absolutism and Value-Relativism

    Damböck, C. (Christian)
    No abstract available.

  4. Zur Rolle Kants in Cohens Frühwerk

    Damböck, Christian; Institut Wiener Kreis, Fakultat fur Philosophie und Bildungswissenschaft, University of Vienna; Institut Wiener Kreis, Fakultat fur Philosophie und Bildungswissenschaft, University of Vienna

  5. Zur Rolle Kants in Cohens Frühwerk

    Damböck, C. (Christian)
    Kein Abstract verfügbar.

  6. Detailed wavefunction analysis for multireference methods: Implementation in the Molcas program package and applications to tetracene

    Plasser, Felix; Institut fur Theoretische Chemie, Fakultat fur Chemie, University of Vienna; Institut fur Theoretische Chemie, Fakultat fur Chemie, University of Vienna; Mewes, Stefanie A.; Heidelberg University; Dreuw, Andreas; Heidelberg University; Gonzalez, Leticia; Institut fur Theoretische Chemie, Fakultat fur Chemie, University of Vienna; Institut fur Theoretische Chemie, Fakultat fur Chemie, University of Vienna
    High-level multireference computations on electronically excited and charged states of tetracene are performed, and the results are analyzed using an extensive wavefunction analysis toolbox that has been newly implemented in the Molcas program package. Aside from verifying the strong effect of dynamic correlation, this study reveals an unexpected critical influence of the atomic orbital basis set. It is shown that different polarized double-ζ basis sets produce significantly different results for energies, densities and overall wavefunctions, with the best performance obtained for the atomic natural orbital (ANO) basis set by Pierloot et al. Strikingly, the ANO basis set does not only...

  7. Translation practice in the field. Current research on socio-cognitive processes

    Risku, Hanna; Universität Graz; Institut fur Translationswissenschaft, Zentrum fur Translationswissenschaft, University of Vienna; Institut fur Translationswissenschaft, Zentrum fur Translationswissenschaft, University of Vienna; Rogl, Regina; Universität Graz; Institut fur Translationswissenschaft, Zentrum fur Translationswissenschaft, University of Vienna; Institut fur Translationswissenschaft, Zentrum fur Translationswissenschaft, University of Vienna; Milosevic, Jelena; Universität Graz; Institut fur Translationswissenschaft, Zentrum fur Translationswissenschaft, University of Vienna; Institut fur Translationswissenschaft, Zentrum fur Translationswissenschaft, University of Vienna
    kein Abstract verfügbar

  8. Challenging Participation in Sustainability Research

    Felt, Ulrike; Institut fur Wissenschafts- und Technikforschung, Fakultat fur Sozialwissenschaften, University of Vienna; Institut fur Wissenschafts- und Technikforschung, Fakultat fur Sozialwissenschaften, University of Vienna; Igelsböck, Judith; Institut fur Wissenschafts- und Technikforschung, Fakultat fur Sozialwissenschaften, University of Vienna; Institut fur Wissenschafts- und Technikforschung, Fakultat fur Sozialwissenschaften, University of Vienna; Schikowitz, Andrea; Institut fur Wissenschafts- und Technikforschung, Fakultat fur Sozialwissenschaften, University of Vienna; Institut fur Wissenschafts- und Technikforschung, Fakultat fur Sozialwissenschaften, University of Vienna
    If we take the rhetoric of recent academic and policy discourse at face value, crossing disciplinary and institutional boundaries and engaging extra-scientific actors in the production and distribution of knowledge has become a kind of ‘gold standard’ . This is particularly true for fields like sustainability research, which is supposed to address the complexity of so-called ‘grand challenges’ of contemporary societies. Investigating the projects of a funding scheme for participatory sustainability research, this paper explores how researchers frame participatory research practices in their prospective narrations in research proposals and in their retrospective reflections in the framework of interviews. Thereby we...

  9. "OAE 3" - regional Atlantic organic carbon burial during the Coniacian–Santonian

    Wagreich, M.; Department fur Geodynamik und Sedimentologie, Fakultat fur Geowissenschaften, Geographie und Astronomie, University of Vienna; Department fur Geodynamik und Sedimentologie, Fakultat fur Geowissenschaften, Geographie und Astronomie, University of Vienna
    The Coniacian–Santonian time interval is the inferred time of oceanic anoxic event 3 (OAE 3), the last of the Cretaceous OAEs. A detailed look on the temporal and spatial distribution of organic-rich deposits attributed to OAE 3 suggests that black shale occurrences are restricted to the equatorial to mid-latitudinal Atlantic and adjacent basins, shelves and epicontinental seas like parts of the Caribbean, the Maracaibo Basin and the Western Interior Basin, and are largely absent in the Tethys, the North Atlantic, the southern South Atlantic, and the Pacific. Here, oxic bottom waters prevailed as indicated by the widespread occurrence of red...

  10. Convergent Evolution of Sodium Ion Selectivity in Metazoan Neuronal Signaling

    Gur Barzilai, Maya; Department of Molecular Biology and Ecology of Plants, George S. Wise Faculty of Life Sciences, Tel-Aviv University; Reitzel, Adam M.; Biology Department, Woods Hole Oceanographic Institution; Kraus, Johanna E.M.; Department fur Molekulare Evolution und Entwicklung, Fakultat fur Lebenswissenschaften, University of Vienna; Department fur Molekulare Evolution und Entwicklung, Fakultat fur Lebenswissenschaften, University of Vienna; Gordon, Dalia; Department of Molecular Biology and Ecology of Plants, George S. Wise Faculty of Life Sciences, Tel-Aviv University; Technau, Ulrich; Department fur Molekulare Evolution und Entwicklung, Fakultat fur Lebenswissenschaften, University of Vienna; Department fur Molekulare Evolution und Entwicklung, Fakultat fur Lebenswissenschaften, University of Vienna; Gurevitz, Michael; Department of Molecular Biology and Ecology of Plants, George S. Wise Faculty of Life Sciences, Tel-Aviv University; Moran, Yehu; Department fur Molekulare Evolution und Entwicklung, Fakultat fur Lebenswissenschaften, University of Vienna; Department fur Molekulare Evolution und Entwicklung, Fakultat fur Lebenswissenschaften, University of Vienna
    Ion selectivity of metazoan voltage-gated Na+ channels is critical for neuronal signaling and has long been attributed to a ring of four conserved amino acids that constitute the ion selectivity filter (SF) at the channel pore. Yet, in addition to channels with a preference for Ca2+ ions, the expression and characterization of Na+ channel homologs from the sea anemone Nematostella vectensis, a member of the early-branching metazoan phylum Cnidaria, revealed a sodium-selective channel bearing a noncanonical SF. Mutagenesis and physiological assays suggest that pore elements additional to the SF determine the preference for Na+ in this channel. Phylogenetic analysis assigns...

  11. Acute Reversible Heart Failure Caused by Coronary Vasoconstriction due to Continuous 5-Fluorouracil Combination Chemotherapy

    Dechant, Cornelia; Department of Cardiology, Kaiser Franz Josef Hospital; Baur, Martina; LBI-ACR VIEnna and ACR-ITR VIEnna Centre for Oncology and Haematology, Kaiser Franz Josef Hospital; Böck, Rudolf; Department of Cardiology, Kaiser Franz Josef Hospital; Czejka, Martin; Fakultat fur Lebenswissenschaften, University of Vienna; Fakultat fur Lebenswissenschaften, University of Vienna; Podczeck-Schweighofer, Andrea; Department of Cardiology, Kaiser Franz Josef Hospital; Dittrich, Christian; LBI-ACR VIEnna and ACR-ITR VIEnna Centre for Oncology and Haematology, Kaiser Franz Josef Hospital; Christ, Günter; Department of Cardiology, Kaiser Franz Josef Hospital
    We present the case of a 51-year-old male patient who received adjuvant chemotherapy consisting of oxaliplatin, bolus and continuous 5-fluorouracil (5-FU) and leucovorin after anterior resection because of locally advanced rectal cancer. Preoperative chemotherapy with capecitabine (an oral 5-FU prodrug) had been well tolerated. Two days after initiation of the first course of chemotherapy, the patient reported typical chest pain. The ECG showed ST elevations and prominent T waves in almost all leads. Due to suspicion of a high-risk acute coronary syndrome, an urgent cardiac catheterization was performed. It showed a generally reduced coronary flow with multiple significant stenoses (including...

  12. Unconscious Cueing via the Superior Colliculi: Evidence from Searching for Onset and Color Targets

    Fuchs, Isabella; Fakultat fur Psychologie, University of Vienna; Fakultat fur Psychologie, University of Vienna; Ansorge, Ulrich; Fakultat fur Psychologie, University of Vienna; Fakultat fur Psychologie, University of Vienna
    According to the bottom-up theory of attention, unconscious abrupt onsets are highly salient and capture attention via the Superior Colliculi (SC). Crucially, abrupt onsets increase the perceived contrast. In line with the SC hypothesis, unconscious abrupt-onset cues capture attention regardless of the cue color when participants search for abrupt-onset targets (Experiment 1). Also, stronger cueing effects occur for higher than lower contrast cues (Experiment 2) and for temporally, rather than nasally, presented stimuli (Experiment 3). However, in line with the known color-insensitivity of the SC, the SC pathway is shunted and unconscious abrupt-onset cues no longer capture attention when the...

  13. Vitamin and antioxidant rich diet increases MLH1 promoter DNA methylation in DMT2 subjects

    Switzeny, Olivier J; Department fur Ernahrungswissenschaften, Fakultat fur Lebenswissenschaften, University of Vienna; Department fur Ernahrungswissenschaften, Fakultat fur Lebenswissenschaften, University of Vienna; Müllner, Elisabeth; Department fur Ernahrungswissenschaften, Fakultat fur Lebenswissenschaften, University of Vienna; Department fur Ernahrungswissenschaften, Fakultat fur Lebenswissenschaften, University of Vienna; Wagner, Karl-Heinz; Department fur Ernahrungswissenschaften, Fakultat fur Lebenswissenschaften, University of Vienna; Department fur Ernahrungswissenschaften, Fakultat fur Lebenswissenschaften, University of Vienna; Brath, Helmut; Diabetes Outpatient Clinics, Health Centre South Vienna; Aumüller, Eva; Department fur Ernahrungswissenschaften, Fakultat fur Lebenswissenschaften, University of Vienna; Department fur Ernahrungswissenschaften, Fakultat fur Lebenswissenschaften, University of Vienna; Haslberger, Alexander G; Department fur Ernahrungswissenschaften, Fakultat fur Lebenswissenschaften, University of Vienna; Department fur Ernahrungswissenschaften, Fakultat fur Lebenswissenschaften, University of Vienna
    Background: Oxidative stress may lead to an increased level of unrepaired cellular DNA damage, which is discussed as one risk for tumor initiation. Mismatch repair (MMR) enzymes act as proofreading complexes that maintain the genomic integrity and MMR-deficient cells show an increased mutation rate. One important gene in the MMR complex is the MutL homolog 1 (MLH1) gene. Since a diet rich in antioxidants has the potential to counteract harmful effects by reactive oxygen species (ROS), we investigated the impact of an antioxidant, folate, and vitamin rich diet on the epigenetic pattern of MLH1. These effects were analyzed in individuals...

  14. Spiral cleavage and early embryology of a loxosomatid entoproct and the usefulness of spiralian apical cross patterns for phylogenetic inferences

    Merkel, Julia; Institute of Zoology, Johannes Gutenberg University; Wollesen, Tim; Department fur Integrative Zoologie, Fakultat fur Lebenswissenschaften, University of Vienna; Department fur Integrative Zoologie, Fakultat fur Lebenswissenschaften, University of Vienna; Lieb, Bernhard; Institute of Zoology, Johannes Gutenberg University; Wanninger, Andreas; Department fur Integrative Zoologie, Fakultat fur Lebenswissenschaften, University of Vienna; Department fur Integrative Zoologie, Fakultat fur Lebenswissenschaften, University of Vienna
    Background: Among the four major bilaterian clades, Deuterostomia, Acoelomorpha, Ecdysozoa, and Lophotrochozoa, the latter shows an astonishing diversity of bodyplans. While the largest lophotrochozoan assemblage, the Spiralia, which at least comprises Annelida, Mollusca, Entoprocta, Platyhelminthes, and Nemertea, show a spiral cleavage pattern, Ectoprocta, Brachiopoda and Phoronida (the Lophophorata) cleave radially. Despite a vast amount of recent molecular phylogenetic analyses, the interrelationships of lophotrochozoan phyla remain largely unresolved. Thereby, Entoprocta play a key role, because they have frequently been assigned to the Ectoprocta, despite their differently cleaving embryos. However, developmental data on entoprocts employing modern methods are virtually non-existent and the...

  15. Hidden genetic diversity in the green alga Spirogyra (Zygnematophyceae, Streptophyta)

    Chen, Charlotte; Department fur Limnologie und Bio-Ozeanographie, Fakultat fur Lebenswissenschaften, University of Vienna; Department fur Limnologie und Bio-Ozeanographie, Fakultat fur Lebenswissenschaften, University of Vienna; Barfuss, Michael HJ; Department fur Botanik und Biodiversitatsforschung, Fakultat fur Lebenswissenschaften, University of Vienna; Department fur Botanik und Biodiversitatsforschung, Fakultat fur Lebenswissenschaften, University of Vienna; Pröschold, Thomas; Department fur Limnologie und Bio-Ozeanographie, Fakultat fur Lebenswissenschaften, University of Vienna; Department fur Limnologie und Bio-Ozeanographie, Fakultat fur Lebenswissenschaften, University of Vienna; Schagerl, Michael; Department fur Limnologie und Bio-Ozeanographie, Fakultat fur Lebenswissenschaften, University of Vienna; Department fur Limnologie und Bio-Ozeanographie, Fakultat fur Lebenswissenschaften, University of Vienna
    Background: The unbranched filamentous green alga Spirogyra (Streptophyta, Zygnemataceae) is easily recognizable based on its vegetative morphology, which shows one to several spiral chloroplasts. This simple structure falsely points to a low genetic diversity: Spirogyra is commonly excluded from phylogenetic analyses because the genus is known as a long-branch taxon caused by a high evolutionary rate. Results: We focused on this genetic diversity and sequenced 130 Spirogyra small subunit nuclear ribosomal DNA (SSU rDNA) strands of different origin. The resulting SSU rDNA sequences were used for phylogenetic analyses using complex evolutionary models (posterior probability, maximum likelihood, neighbor joining, and maximum parsimony...

  16. From event-labeled gene trees to species trees

    Hernandez-Rosales, Maribel; Max-Planck-Institute for Mathematics in the Sciences; Hellmuth, Marc; Center for Bioinformatics, Saarland University; Wieseke, Nicolas; High Throughput Bioinformatics, Faculty of Mathematics and Computer Science, Friedrich Schiller Universität Jena; Huber, Katharina T; School of Computing Sciences, University of East Anglia; Moulton, Vincent; School of Computing Sciences, University of East Anglia; Stadler, Peter F; Institut fur Theoretische Chemie, Fakultat fur Chemie, University of Vienna; Institut fur Theoretische Chemie, Fakultat fur Chemie, University of Vienna
    Background: Tree reconciliation problems have long been studied in phylogenetics. A particular variant of the reconciliation problem for a gene tree T and a species tree S assumes that for each interior vertex x of T it is known whether x represents a speciation or a duplication. This problem appears in the context of analyzing orthology data. Results: We show that S is a species tree for T if and only if S displays all rooted triples of T that have three distinct species as their leaves and are rooted in a speciation vertex. A valid reconciliation map can then be...

  17. Do we still need supertrees?

    Haeseler, Arndt; Department fur Strukturbiologie und Computational Biology, Zentrum fur Molekulare Biologie, University of Vienna; Department fur Strukturbiologie und Computational Biology, Zentrum fur Molekulare Biologie, University of Vienna
    The up-dated species level phylogeny for the carnivores using a supertree approach provides new insights into the evolutionary origin and relationships of carnivores. While the gain in biological knowledge is substantial, the supertree approach is not undisputed. I discuss the principles of supertree methods and the competitor supermatrix approaches. I argue that both methods are important to infer phylogenetic relationships.

  18. Nuclear and plastid haplotypes suggest rapid diploid and polyploid speciation in the N Hemisphere Achillea millefolium complex (Asteraceae)

    Guo, Yan-Ping; College of Life Sciences, Beijing Normal University; Wang, Shuai-Zhen; College of Life Sciences, Beijing Normal University; Vogl, Claus; Institute of Animal Breeding and Genetics, University of Veterinary Medicine; Ehrendorfer, Friedrich; Department fur Botanik und Biodiversitatsforschung, Fakultat fur Lebenswissenschaften, University of Vienna; Department fur Botanik und Biodiversitatsforschung, Fakultat fur Lebenswissenschaften, University of Vienna
    Background: Species complexes or aggregates consist of a set of closely related species often of different ploidy levels, whose relationships are difficult to reconstruct. The N Hemisphere Achillea millefolium aggregate exhibits complex morphological and genetic variation and a broad ecological amplitude. To understand its evolutionary history, we study sequence variation at two nuclear genes and three plastid loci across the natural distribution of this species complex and compare the patterns of such variations to the species tree inferred earlier from AFLP data. Results: Among the diploid species of A. millefolium agg., gene trees of the two nuclear loci, ncpGS and SBP,...

  19. Implications of hybridisation and cytotypic differentiation in speciation assessed by AFLP and plastid haplotypes - a case study of Potentilla alpicola La Soie

    Paule, Juraj; Department of Biodiversity and Plant Systematics, Centre for Organismal Studies (COS) Heidelberg, Heidelberg University; Scherbantin, Antonia; Department fur Pharmakognosie, Fakultat fur Lebenswissenschaften, University of Vienna; Department fur Pharmakognosie, Fakultat fur Lebenswissenschaften, University of Vienna; Dobeš, Christoph; Department fur Pharmakognosie, Fakultat fur Lebenswissenschaften, University of Vienna; Department fur Pharmakognosie, Fakultat fur Lebenswissenschaften, University of Vienna
    Background: Hybridisation is presumed to be an important mechanism in plant speciation and a creative evolutionary force often accompanied by polyploidisation and in some cases by apomixis. The Potentilla collina group constitutes a particularly suitable model system to study these phenomena as it is morphologically extensively variable, exclusively polyploid and expresses apomixis. In the present study, the alpine taxon Potentilla alpicola has been chosen in order to study its presumed hybrid origin, identify underlying evolutionary processes and infer the discreteness or taxonomic value of hybrid forms. Results: Combined analysis of AFLP, cpDNA sequences and ploidy level variation revealed a hybrid origin...

  20. Usability of therapy controllers in elderly patients with deep brain stimulation

    Kaiser, Iris; Fakultat fur Psychologie, University of Vienna; Fakultat fur Psychologie, University of Vienna; Kryspin-Exner, Ilse; Fakultat fur Psychologie, University of Vienna; Fakultat fur Psychologie, University of Vienna; Czech, Thomas; Department of Neurosurgery, Medical University of Vienna; Alesch, Francois; Department of Neurosurgery, Medical University of Vienna
    Background: Technical devices are becoming more prevalent in society and also in medical care. Older adults need more support to learn new technologies than younger subjects. So far, no research has been done on the usability of patient controllers in deep brain stimulation in an elderly population. The aim of the study was to investigate the factors influencing the performance of elderly DBS patients with respect to usability aspects of Medtronic Access therapy controllers. Methods: Time, mistakes and frequency of use of the controller were compared in 41 elderly DBS patients who prior to the study had already owned a therapy...

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