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  • 1
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    A histone mutant reproduces the phenotype caused by loss of histone-modifying factor Polycomb (2013)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2013-02-09
    Description: Although many metazoan enzymes that add or remove specific modifications on histone proteins are essential transcriptional regulators, the functional significance of posttranslational modifications on histone proteins is not well understood. Here, we show in Drosophila that a point mutation in lysine 27 of histone H3 (H3-K27) fails to repress transcription of genes that are normally repressed by Polycomb repressive complex 2 (PRC2), the methyltransferase that modifies H3-K27. Moreover, differentiated H3-K27 mutant cells show homeotic transformations like those seen in PRC2 mutant cells. Taken together, these analyses demonstrate that H3-K27 is the crucial physiological substrate that PRC2 modifies for Polycomb repression.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pengelly, Ana Raquel -- Copur, Omer -- Jackle, Herbert -- Herzig, Alf -- Muller, Jurg -- New York, N.Y. -- Science. 2013 Feb 8;339(6120):698-9. doi: 10.1126/science.1231382.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Chromatin and Chromosome Biology Research Group, Max Planck Institute of Biochemistry, Am Klopferspitz 18, 82152 Martinsried, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23393264" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Differentiation ; Drosophila Proteins/chemistry/*genetics/*metabolism ; Drosophila melanogaster/*genetics/growth & development/metabolism ; *Gene Expression Regulation ; Genes, Homeobox ; Genes, Insect ; Histones/chemistry/*genetics/*metabolism ; Lysine ; Mutant Proteins/chemistry/metabolism ; Nucleosomes/metabolism ; Phenotype ; Point Mutation ; Polycomb Repressive Complex 2/*metabolism ; Protein Processing, Post-Translational ; Transcription, Genetic ; Transgenes
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 2
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    Mitocellular communication: Shaping health and disease (2019)
    American Association for the Advancement of Science (AAAS)
    In: Science
    Details
    Publication Date: 2019
    Description: 〈p〉Throughout the animal kingdom, mitochondria are the only organelles that retain their own genome and the transcription and translation machineries that are all essential for energy harvesting. Mitochondria have developed a complex communication network, allowing them to stay in tune with cellular needs and nuclear transcriptional programs and to alleviate mitochondrial dysfunction. Here, we review recent findings on the wide array of mechanisms that contribute to these mitocellular communication networks, spanning from well-studied messenger molecules to mitonuclear genetic interactions. Based on these observations and developments, we advocate a broad and inclusive view on mitocellular interactions, which can have profound impacts on physiological, pathological, and evolutionary processes.〈/p〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 3
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    Spatial and temporal variability of microbial activity in the reed of Lake Neusiedl (Austria) (2000)
    In:  EPIC37th European Marine Microbiology Symposium (EMMS), Noordwijkerhout, Netherlands.-22.09.2000., 17
    Details
    Publication Date: 2019-07-17
    Repository Name: EPIC Alfred Wegener Institut
    Type: Conference , notRev
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  • 4
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    The vertical distribution of zooplankton in the Goggausee (the influence of algae and Chaoborus flavicans) [Translation from: Carinthia II 166/186 373-385, 1976] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4882 | 1256 | 2011-09-29 15:46:20 | 4882 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-07
    Description: The Goggausee, a small, shallow, meromictic lake(700m long, 150m wide, max. depth=12m, mean depth=6m), was the site of a week long study (19-26 May 1974) of the limnology department of the University of Vienna. The study comprised pollen analysis and palaeolimnological studies on the one hand, as well as a stock- taking of physiochemical factors, primary production, bacteria, zooplankton, zoo benthos and fish on the other. This paper studies the zooplankton of the lake. The Goggausee is a meromictic lake, with its anoxic deep water, that restricts the vertical distribution of most zooplankton. The aim of the study was to pursue the vertical distribution of the rotifers and Crustacea. Density of individuals, biomass, percentages of zooplankton together and crustaceans and rotifers as groups. Special consideration is given to the the Dipteran Chaoborus flavicans.
    Description: Translated from German into English
    Keywords: Biology ; Ecology ; Limnology ; Zooplankton ; Environmental surveys ; Freshwater crustaceans ; Biomass ; Freshwater lakes ; Population density ; Austria ; Chaoborus flavicans
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
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  • 5
    Electronic Resource
    Electronic Resource
    The influence of temperature on the embryonic development of three cyprinid fishes, Abramis brama, Chalcalburnus chalcoides mento and Vimba vimba (1986)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 28 (1986), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: The influence of temperature on the embryonic development of three European cyprinid fishes, Abramis brama, Chalcalburnus chalcoides mento and Vimba vimba, was studied with respect to hatching efficiency and the functional relationship with the duration of development. The functional dependance of the duration of development on temperature is well described by a power function with a correcting constant for temperature. Comparison with published data for other cyprinids shows that the response of embryos to temperature, together with the various temperature controlled responses of adult fishes, is a valuable aid for the ecological characterization of the different species.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1095-8649.1986.tb05155.x
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Quantifying the effects of distance and conspecifics on colonization: experiments and models using the loosestrife leaf beetle, Galerucella calmariensis (1997)
    Springer
    Oecologia 110 (1997), S. 60-68 
    Details
    ISSN: 1432-1939
    Keywords: Key wordsGalerucella calmariensis  ;  Lythrum salicaria  ;  Dispersal  ;  Biological control  ;  Aggregation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The ability of an insect to disperse to new habitat patches is difficult to quantify, but key to the establishment and persistence of populations. In this study, we examined dispersal of the phytophagous chrysomelid beetle, Galerucella calmariensis, which is currently being introduced into North America for the biological control of purple loosestrife (Lythrum salicaria), an aggressive wetland weed. We used a mark, release, and recapture approach to determine how rates of colonization of host patches by this beetle are influenced by the distance of the patch from the source of dispersers, and by the presence of conspecifics at the patch. We released color-coded beetles at six distances from a long, linear patch of purple loosestrife that was divided into segments with and without conspecifics. We observed initial flight directions as beetles left the release points and collected all beetles that settled at the target patch. We found a bias in initial flight toward the target for distances up to 50 m. Over the 7 days of the experiment, beetles arrived at the target from all release points, including the farthest release point, 847 m away. G. calmariensis was strongly attracted to conspecifics when settling after dispersal; 86% of the 582 recovered beetles came from the segments inhabited by conspecifics. The probability of an individual arriving at the patch declined steeply with release distance. This relationship fits a model in which beetles move in a random direction and stop if they intercept the target patch, and where beetles are lost at a constant rate with distance travelled. The dispersal and patch-colonizing behavior of G. calmariensis is likely to have important consequences for the biological control program against purple loosestrife.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004420050133
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  • 7
    Electronic Resource
    Electronic Resource
    Ten years quantitative data on a population of rhinoglena fertöensis (brachionidae, monogononta) (1980)
    Springer
    Hydrobiologia 73 (1980), S. 161-167 
    Details
    ISSN: 1573-5117
    Keywords: Rhinoglena ; winter plankton ; shallow lake ; abundance ; resting eggs ; distribution
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Some information, based upon a ten years study, is given on the ecology of Rhinoglena fertöensis, a cold stenothermic rotifer. The largest numbers were always found during winter months under ice. A remarkable increase in population density is recorded throughout the investigation and is explained by the good quality of the food supply and a parallel increase in its abundance. The dynamics of this species appear to be closely connected with water temperature gradients. The distribution of Rhinoglena fertöensis is discussed in connection with water chemistry.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00019442
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  • 8
    Electronic Resource
    Electronic Resource
    Effect of habitat structure on the feeding efficiency of young stages of razor fish (Pelecus cultratus (L.)): an experimental approach (1995)
    Springer
    Hydrobiologia 299 (1995), S. 75-81 
    Details
    ISSN: 1573-5117
    Keywords: razor fish ; feeding ; zooplankton ; habitat complexity ; prey selection
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The effects of a submerged macrophyte (Potamogeton pectinatus), turbidity (produced by 50 mg l−1 kaolin), and their combination on the feeding rate of young razor fish (Pelecus cultratus (L.)) were studied in the laboratory. Young razor fish showed preference for Copepoda in most of the simulated habitats. Razor fish fed more efficiently in the absence of any environmental structure, but the more structured habitats, 3 g wet wt l−1 of simulated submerged macrophyte and turbidity combined with vegetation, had a negative impact on food consumption rates.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00016887
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  • 9
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    Early growth response 1 protein, an upstream gatekeeper of the p53 tumor suppressor, controls replicative senescence (2003)
    National Academy of Sciences
    Details
    Publication Date: 2003-03-10
    Print ISSN: 0027-8424
    Electronic ISSN: 1091-6490
    Topics: Biology , Medicine , Natural Sciences in General
    Published by National Academy of Sciences
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  • 10
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    A formal account of dishonesty (2015)
    Oxford University Press
    Details
    Publication Date: 2015-03-28
    Description: This article provides formal accounts of dishonest attitudes of agents. We introduce a propositional multi-modal logic that can represent an agent's belief and intention as well as communication between agents. Using the language, we formulate different categories of dishonesty. We first provide two different definitions of lies and provide their logical properties. We then consider an incentive behind the act of lying and introduce lying with objectives. We subsequently define bullshit , withholding information and half-truths , and analyse their formal properties. We compare different categories of dishonesty in a systematic manner, and examine their connection to deception . We also propose maxims for dishonest communication that agents should ideally try to satisfy.
    Print ISSN: 1367-0751
    Electronic ISSN: 1368-9894
    Topics: Mathematics
    Published by Oxford University Press
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