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  • Articles  (165)
  • Biology  (159)
  • Technology  (3)
  • Electrical Engineering, Measurement and Control Technology  (3)
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  • Articles  (165)
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  • 1
    Electronic Resource
    Electronic Resource
    Rapid release of free arachidonic acid in the central nervous system due to stimulation
    Amsterdam : Elsevier
    Progress in Lipid Research 20 (1981), S. 523-529 
    Details
    ISSN: 0163-7827
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0163-7827(81)90092-8
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    Paper (German National Licenses)
    Fulltext
  • 2
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    BioModels: ten-year anniversary (2015)
    Oxford University Press
    Details
    Publication Date: 2015-01-16
    Description: BioModels ( http://www.ebi.ac.uk/biomodels/ ) is a repository of mathematical models of biological processes. A large set of models is curated to verify both correspondence to the biological process that the model seeks to represent, and reproducibility of the simulation results as described in the corresponding peer-reviewed publication. Many models submitted to the database are annotated, cross-referencing its components to external resources such as database records, and terms from controlled vocabularies and ontologies. BioModels comprises two main branches: one is composed of models derived from literature, while the second is generated through automated processes. BioModels currently hosts over 1200 models derived directly from the literature, as well as in excess of 140 000 models automatically generated from pathway resources. This represents an approximate 60-fold growth for literature-based model numbers alone, since BioModels’ first release a decade ago. This article describes updates to the resource over this period, which include changes to the user interface, the annotation profiles of models in the curation pipeline, major infrastructure changes, ability to perform online simulations and the availability of model content in Linked Data form. We also outline planned improvements to cope with a diverse array of new challenges.
    Print ISSN: 0305-1048
    Electronic ISSN: 1362-4962
    Topics: Biology
    Published by Oxford University Press
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  • 3
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    H2 accumulation and N2 fixation variation by Ni limitation in Cyanothece (2019)
    Wiley
    Details
    Publication Date: 2019
    Description: Abstract Ni is an essential cofactor in NiFe‐uptake hydrogenase, an enzyme regulating H2 metabolism in diazotrophic cyanobacteria, the major H2 producers in the surface ocean globally. Here, we investigated the effect of Ni supply on H2 production and N2 fixation by using a model marine cyanobacterial diazotroph, Cyanothece. By mediating total dissolved Ni concentrations from 100 to 0.03 nmol L−1 in a trace metal‐defined culture medium, we demonstrated that Ni deficiency results in H2 accumulation, coupled with decreasing Ni quotas, growth rates, and occasionally relatively low N2 fixation rates. These results indicate that Ni deficiency limits the growth of the Cyanothece to some extent, considerably decreases H2 uptake by hydrogenase and leads to H2 accumulation and N2 fixation variation in the diazotroph. The findings show that Ni availability is a critical factor on controlling H2 production and N2 fixation in marine diazotrophic cyanobacteria. The information of Ni bioavailability for diazotrophic cyanobacteria is thus essential to evaluate the importance of Ni for H2 cycling and N2 fixation in oceanic surface waters.
    Print ISSN: 0024-3590
    Electronic ISSN: 1939-5590
    Topics: Biology , Geosciences , Physics
    Published by Wiley on behalf of The Association for the Sciences of Limnology and Oceanography (ASLO).
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  • 4
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    Biodiversity and biogeography of phages in modern stromatolites and thrombolites (2008)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2008-03-04
    Description: Viruses, and more particularly phages (viruses that infect bacteria), represent one of the most abundant living entities in aquatic and terrestrial environments. The biogeography of phages has only recently been investigated and so far reveals a cosmopolitan distribution of phage genetic material (or genotypes). Here we address this cosmopolitan distribution through the analysis of phage communities in modern microbialites, the living representatives of one of the most ancient life forms on Earth. On the basis of a comparative metagenomic analysis of viral communities associated with marine (Highborne Cay, Bahamas) and freshwater (Pozas Azules II and Rio Mesquites, Mexico) microbialites, we show that some phage genotypes are geographically restricted. The high percentage of unknown sequences recovered from the three metagenomes (〉97%), the low percentage similarities with sequences from other environmental viral (n = 42) and microbial (n = 36) metagenomes, and the absence of viral genotypes shared among microbialites indicate that viruses are genetically unique in these environments. Identifiable sequences in the Highborne Cay metagenome were dominated by single-stranded DNA microphages that were not detected in any other samples examined, including sea water, fresh water, sediment, terrestrial, extreme, metazoan-associated and marine microbial mats. Finally, a marine signature was present in the phage community of the Pozas Azules II microbialites, even though this environment has not been in contact with the ocean for tens of millions of years. Taken together, these results prove that viruses in modern microbialites display biogeographical variability and suggest that they may be derived from an ancient community.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Desnues, Christelle -- Rodriguez-Brito, Beltran -- Rayhawk, Steve -- Kelley, Scott -- Tran, Tuong -- Haynes, Matthew -- Liu, Hong -- Furlan, Mike -- Wegley, Linda -- Chau, Betty -- Ruan, Yijun -- Hall, Dana -- Angly, Florent E -- Edwards, Robert A -- Li, Linlin -- Thurber, Rebecca Vega -- Reid, R Pamela -- Siefert, Janet -- Souza, Valeria -- Valentine, David L -- Swan, Brandon K -- Breitbart, Mya -- Rohwer, Forest -- England -- Nature. 2008 Mar 20;452(7185):340-3. doi: 10.1038/nature06735. Epub 2008 Mar 2.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biology, San Diego State University, San Diego, California 92182, USA. cdesnues@yahoo.fr〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18311127" target="_blank"〉PubMed〈/a〉
    Keywords: Bacteriophages/classification/genetics/*isolation & purification/*physiology ; Bahamas ; *Biodiversity ; Capsid/chemistry ; Computational Biology ; DNA, Viral/analysis/genetics ; *Ecosystem ; Fresh Water/microbiology/virology ; Genome, Viral/genetics ; Genomics ; *Geography ; Geologic Sediments/microbiology/virology ; Mexico ; Molecular Sequence Data ; Phylogeny ; Proteome/metabolism ; Seawater/microbiology/virology ; *Water Microbiology
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Published by Nature Publishing Group (NPG)
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  • 5
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    Prevention of vaginal SHIV transmission in rhesus macaques through inhibition of CCR5 (2004)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2004-10-16
    Description: Topical agents, such as microbicides, that can protect against human immunodeficiency virus (HIV) transmission are urgently needed. Using a chimeric simian/human immunodeficiency virus (SHIV SF162), which is tropic for the chemokine receptor CCR5, we report that topical application of high doses of PSC-RANTES, an amino terminus-modified analog of the chemokine RANTES, provided potent protection against vaginal challenge in rhesus macaques. These experimental findings have potentially important implications for understanding vaginal transmission of HIV and the design of strategies for its prevention.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lederman, Michael M -- Veazey, Ronald S -- Offord, Robin -- Mosier, Donald E -- Dufour, Jason -- Mefford, Megan -- Piatak, Michael Jr -- Lifson, Jeffrey D -- Salkowitz, Janelle R -- Rodriguez, Benigno -- Blauvelt, Andrew -- Hartley, Oliver -- AI 36219/AI/NIAID NIH HHS/ -- AI 51649/AI/NIAID NIH HHS/ -- N01-CO-124000/CO/NCI NIH HHS/ -- New York, N.Y. -- Science. 2004 Oct 15;306(5695):485-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Medicine, Case Western Reserve University, University Hospitals, 2061 Cornell Road, Cleveland, OH 44106, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15486300" target="_blank"〉PubMed〈/a〉
    Keywords: Administration, Intravaginal ; Animals ; Anti-HIV Agents/administration & dosage/*therapeutic use ; Anti-Infective Agents, Local/administration & dosage/*therapeutic use ; Antibodies, Viral/blood ; *CCR5 Receptor Antagonists ; Chemokine CCL5/administration & dosage/*analogs & derivatives/*therapeutic use ; Dose-Response Relationship, Drug ; Drug Evaluation, Preclinical ; Female ; HIV Infections/*prevention & control/transmission ; HIV-1/drug effects ; Macaca mulatta ; Receptors, CCR5/metabolism ; Simian Acquired Immunodeficiency Syndrome/*prevention & control/transmission ; Simian Immunodeficiency Virus/drug effects/immunology ; Vagina/*virology
    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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  • 6
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    Ecology: Change is in the air (2016)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2016-04-30
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rodriguez, Barbra -- England -- Nature. 2016 Apr 21;532(7599):403-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/27127819" target="_blank"〉PubMed〈/a〉
    Keywords: Adaptation, Physiological ; Animal Migration ; Animals ; Biodiversity ; Climate Change/economics/*statistics & numerical data ; Ecology/economics/manpower/*methods/*trends ; *Ecosystem ; Plants ; Research/economics/manpower/*trends ; *Research Design ; Research Personnel ; *Uncertainty ; Ursidae ; *Weather
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Published by Nature Publishing Group (NPG)
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  • 7
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    Differential adult survival at close seabird colonies: the importance of spatial foraging segregation and bycatch risk during the breeding season (2017)
    Wiley
    Details
    Publication Date: 2017-11-28
    Description: Marine megafauna, including seabirds, are critically affected by fisheries bycatch. However, bycatch risk may differ on temporal and spatial scales due to the uneven distribution and effort of fleets operating different fishing gear, and to focal species distribution and foraging behaviour. Scopoli's shearwater Calonectris diomedea is a long-lived seabird that experiences high bycatch rates in longline fisheries and strong population-level impacts due to this type of anthropogenic mortality. Analyzing a long-term data set on individual monitoring, we compared adult survival (by means of multi-event capture-recapture models) among three close predator-free Mediterranean colonies of the species. Unexpectedly for a long-lived organism, adult survival varied among colonies. We explored potential causes of this differential survival, by: (1) measuring egg volume as a proxy of food availability and parental condition; (2) building a specific longline bycatch risk map for the species; and (3) assessing the distribution patterns of breeding birds from the three study colonies via GPS tracking. Egg volume was very similar between colonies over time, suggesting that environmental variability related to habitat foraging suitability was not the main cause of differential survival. On the other hand, differences in foraging movements among individuals from the three colonies expose them to differential mortality risk, which likely influenced the observed differences in adult survival. The overlap of information obtained by the generation of specific bycatch risk maps, the quantification of population demographic parameters and the foraging spatial analysis should inform managers about differential sensitivity to the anthropogenic impact at mesoscale level and guide decisions depending on the spatial configuration of local populations. The approach would apply and should be considered in any species where foraging distribution is colony-specific and mortality risk varies spatially. This article is protected by copyright. All rights reserved.
    Print ISSN: 1354-1013
    Electronic ISSN: 1365-2486
    Topics: Biology , Energy, Environment Protection, Nuclear Power Engineering , Geography
    Published by Wiley
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  • 8
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    Evidence of exceptional oyster-reef resilience to fluctuations in sea level (2017)
    Wiley
    Details
    Publication Date: 2017-11-02
    Description: Ecosystems at the land–sea interface are vulnerable to rising sea level. Intertidal habitats must maintain their surface elevations with respect to sea level to persist via vertical growth or landward retreat, but projected rates of sea-level rise may exceed the accretion rates of many biogenic habitats. While considerable attention is focused on climate change over centennial timescales, relative sea level also fluctuates dramatically (10–30 cm) over month-to-year timescales due to interacting oceanic and atmospheric processes. To assess the response of oyster-reef ( Crassostrea virginica ) growth to interannual variations in mean sea level (MSL) and improve long-term forecasts of reef response to rising seas, we monitored the morphology of constructed and natural intertidal reefs over 5 years using terrestrial lidar. Timing of reef scans created distinct periods of high and low relative water level for decade-old reefs ( n  = 3) constructed in 1997 and 2000, young reefs ( n  = 11) constructed in 2011 and one natural reef (approximately 100 years old). Changes in surface elevation were related to MSL trends. Decade-old reefs achieved 2 cm/year growth, which occurred along higher elevations when MSL increased. Young reefs experienced peak growth (6.7 cm/year) at a lower elevation that coincided with a drop in MSL. The natural reef exhibited considerable loss during the low MSL of the first time step but grew substantially during higher MSL through the second time step, with growth peaking (4.3 cm/year) at MSL, reoccupying the elevations previously lost. Oyster reefs appear to be in dynamic equilibrium with short-term (month-to-year) fluctuations in sea level, evidencing notable resilience to future changes to sea level that surpasses other coastal biogenic habitat types. These growth patterns support the presence of a previously defined optimal growth zone that shifts correspondingly with changes in MSL, which can help guide oyster-reef conservation and restoration. To assess the response of oyster-reef ( Crassostrea virginica ) growth to interannual variations in mean sea level (MSL) and improve long-term forecasts of reef response to rising seas, we monitored the morphology of constructed and natural intertidal reefs over 5 years using terrestrial lidar. Timing of reef scans created distinct periods of high and low relative water level for each generation of reefs, and changes in surface elevation followed trends in MSL during the two sampling periods. Oyster reefs appear to be in dynamic equilibrium with short-term (month-to-year) fluctuations in sea level, evidencing notable resilience to future changes to sea level that surpasses other coastal biogenic habitats.
    Electronic ISSN: 2045-7758
    Topics: Biology
    Published by Wiley
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  • 9
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    TMEM106B drives lung cancer metastasis by inducing TFEB -dependent lysosome synthesis and secretion of cathepsins (2018)
    Springer Nature
    Details
    Publication Date: 2018-07-17
    Description: TMEM106B drives lung cancer metastasis by inducing TFEB -dependent lysosome synthesis and secretion of cathepsins 〈i〉TMEM106B〈/i〉 drives lung cancer metastasis by inducing 〈i〉TFEB〈/i〉-dependent lysosome synthesis and secretion of cathepsins, Published online: 16 July 2018; doi:10.1038/s41467-018-05013-x One of the major causes of cancer-related mortality is represented by metastatic lung cancer. Here the authors characterize the role of TMEM106B in driving metastatic lung adenocarcinoma and suggest that TMEM106B-mediated secretion of cathespin impacts cell migration and invasion of lung cancer cells, increasing metastatic spreading.
    Electronic ISSN: 2041-1723
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General , Physics
    Published by Springer Nature
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  • 10
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    Anti-inflammatory effects of melatonin in a rat model of caerulein-induced acute pancreatitis (2013)
    Wiley
    Details
    Publication Date: 2013-01-26
    Description: The purpose of our study was to evaluate the protective effect of melatonin in a rat model of caerulein-induced acute pancreatitis. For the induction of experimental acute pancreatitis, four subcutaneous injections of caerulein (20 µg kg –1 body weight) were given to Wistar rats at 2-h intervals. Melatonin was injected intraperitoneally (25 mg kg –1 body weight) 30 min before each caerulein injection. After 12 h, rats were sacrificed by decapitation. Blood and pancreas samples were collected and processed for serological and histopathological studies, respectively. Lipase, α-amylase, corticosterone, total antioxidant power and cytokines interleukin (IL)-1β, IL-4 and tumour necrosis factor (TNF)-α were determined using commercial kits. ANOVA and Tukey tests ( P  〈 0.05) were performed for the statistical analysis of the results. Results showed that the administration of melatonin reduced histological damage induced by caerulein treatment as well as the hyperamylasemia and hyperlipidemia. Corticosterone and antioxidant total power were also reverted to basal activities. Furthermore, melatonin pre-treatment reduced pro-inflammatory cytokines IL-1β and TNF-α and increased the serum levels of anti-inflammatory cytokine IL-4. In conclusion, the findings suggest that the protective effect of melatonin in caerulein-induced acute pancreatitis is mediated by the anti-inflammatory ability of this indolamine. Thus, melatonin may have a protective effect against acute pancreatitis. Copyright © 2013 John Wiley & Sons, Ltd.
    Print ISSN: 0263-6484
    Electronic ISSN: 1099-0844
    Topics: Biology , Medicine
    Published by Wiley
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