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12篇 您的检索式:作者名="Anna Fischer"
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1Support for the predictions of the pollinator-mediated stabilizing selection hypothesis显示文摘Aims Floral traits are frequently used in traditional plant systematics because of their assumed constancy.One potential reason for the apparent constancy of flower size is that effective pollen transfer between flowers depends on the accuracy of the physical fit between the flower and pollinator.Therefore,flowers are likely to be under stronger stabilizing selection for uniform size than vegetative plant parts.Moreover,as predicted by the pollinator-mediated stabilizing selection(PMSS)hypothesis,an accurate fit between flowers and their pollinators is likely to be more important for specialized pollination systems as found in many species with bilaterally symmetric(zygomorphic)flowers than for species with radially symmetric(actinomorphic)flowers.Methods In a comparative study of 15 zygomorphic and 13 actinomorphic species in Switzerland,we tested whether variation in flower size,among and within individuals,is smaller than variation in leaf size and whether variation in flower size is smaller in zygomorphic compared to actinomorphic species.Important findings Indeed,variation in leaf length was significantly larger than variation in flower length and width.Within-individual variation in flower and leaf sizes did not differ significantly between zygomorphic and actinomorphic species.In line with the predictions of the PMSS,among-individual variation in flower length and flower width was significantly smaller for zygomorphic species than for actinomorphic species,while the two groups did not differ in leaf length variation.This suggests that plants with zygomorphic flowers have undergone stronger selection for uniform flowers than plants with actinomorphic flowers.This supports that the relative uniformity of flowers compared to vegetative structures within species,as already observed in traditional plant systematics,is,at least in part,a consequence of the requirement for effective pollination.Mark van Kleunen Anna Meier Moritz Saxenhofer Markus Fischer 2008Journal of Plant Ecology2008,1,3:2
2Chemical synthesis of mesoporous carbon nitrides using hard templates and their use as a metal-free catalyst for friedel- crafts reaction of benzene 显示文摘Frederic Goettmarm Anna Fischer Markus Antonietti 2006Angewandte Chemic2006,45,:1
3Arsenic uptake, cytotoxicity and detoxification studied in mammalian cells in culture显示文摘Anna Barbara Fischer J. P. Buchet R. R. Lauwerys 1985Archives of Toxicology1985,,3:1
4Effects of long-term exposure to air pollution on natural-cause mortality: an analysis of 22 European cohorts within the multicentre ESCAPE project显示文摘Rob Beelen Ole Raaschou-Nielsen Massimo Stafoggia Zorana Jovanovic Andersen Gudrun Weinmayr Barbara Hoffmann Kathrin Wolf Evangelia Samoli Paul Fischer Mark Nieuwenhuijsen Paolo Vineis Wei W Xun Klea Katsouyanni Konstantina Dimakopoulou Anna Oudin Bertil 2013The Lancet2013,,:1
5Low-molecular-weight fucoidan enhances the proangiogenic phenotype of endothelial progenitor cells显示文摘Faouzia Zemani Danielle Benisvy Isabelle Galy-Fauroux Anna Lokajczyk Sylvia Colliec-Jouault Georges Uzan Anne Marie Fischer Catherine Boisson-Vidal 2005Biochemical Pharmacology2005,,:1
6Transmembrane 6 superfamily member 2 gene E167K variant impacts on steatosis and liver damage in chronic hepatitis C patients显示文摘Marta Milano Alessio Aghemo Rosellina Margherita Mancina Janett Fischer Paola Dongiovanni Stella De Nicola Anna Ludovica Fracanzani Roberta D’Ambrosio Marco Maggioni Raffaele De Francesco Silvia Fargion Thomas Berg Felix Stickel Jochen Hampe Stefano Romeo 2015Hepatology2015,,1:1
7Activation in striatum and medial temporal lobe during sequence learning in younger and older adults Relations to performance显示文摘Anna Rieckmann Hkan Fischer Lars Bickman 2010Neurolmage2010,50,:1
8Quality of life and out- comes in African Americans with CKD显示文摘Anna P Michael J Fischer K 2014J Am Soc Nephrol2014,25,8:1
9A dominant hepatitis B virus population defective in virus secretion because of several S-gene mutations from a patient with fulminant hepatitis显示文摘Tatyana Kalinina Anna Riu Lutz Fischer Hans Will Martina Sterneck 2001Hepatology2001,,2:1
10Diagnostic potential of neutrophil elastase inhibitor complex in the routine care of critically ill newborn infants显示文摘Joachim E. Fischer Anna Brunner Martin Janousek David Nadal Nenad Blau Sergio Fanconi 2000European Journal of Pediatrics2000,,9:1
11Prolonged Zona Glomerulosa Insufficiency Causing Hyperkalemia in Primary Aldosteronism after Adrenalectomy显示文摘Evelyn Fischer Gregor Hanslik Anna Pallauf Christoph Degenhart Ulrich Linsenmaier Felix Beuschlein Martin Bidlingmaier Thomas Mussack Roland Ladurner Klaus Hallfeldt Marcus Quinkler Martin Reincke 2012The Journal of Clinical Endocrinology & Metabolism2012,,11:1
12Graphitic carbon nitride materi-Ms:variation of structure and morphology andtheir use as metal-free catalysts 显示文摘Arne Thomas Anna Fischer 2008Materials Chemistry2008,18,:1
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