Browsing by Title
Now showing items 69552-69571 of 92773
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(WILEY-BLACKWELL, 2010-05-20)1. While many studies of flower evolution have relied on the assessment of selection coefficients, these estimates represent correlative evidence of selection. Few studies have combined correlative with experimental ...
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(WILEY-BLACKWELL PUBLISHING, 2010-06-17)Most studies on pollinator-mediated selection have been performed in generalized rather than specialized pollination systems. This situation has impeded evaluation of the extent to which selection acts on attraction ...
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(Ecological Society of America, 2003)Mimulus luteus (Scrophulariaceae) is a perennial herb occurring in the South American Andes that shows a wide variation in the size and shape of a red spot on the lower lobe of the yellow flower. We describe the preference ...
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(Springer, 2017)Pollinator species are widely accepted as an important factor in plant reproductive isolation. Although mostly investigated in plants visited by different groups of pollinators (e.g., hummingbirds vs bees), few studies ...
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(AGU Publications, 2015)This article is a review of the science goals and activities initiated within the framework of the Pollution and its Impacts on the South American Cryosphere (PISAC) initiative. Air pollution associated with biomass burning ...
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(Elsevier Science publishes, 2014)This paper integrates the scale, composition, and technique effects of economic growth on pollution using a multi-output endogenous growth framework. Under certain empirically verifiable parameter conditions economic ...
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(Universidad de Chile, 2016)
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(Pontificia Universidad Javeriana 1, 2014)En este artículo se proponen e ilustran los conceptos de polo epistemológico I (cercano a los marcos teóricos del investigador) y polo epistemológico II (cercano a la perspectiva de los participantes de una realidad ...
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(Universidad de ChileCyberDocs, 2010)
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(2006)The synthesis, characterization and electrochemistry of a novel nanocomposite based on the co-intercalation of lithium and poly(acrylonitrile) (PAN) in molybdenum disulfide [Li0.6MoS2(PAN) 1.2·0.5H2O] is described. The ...
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(ELSEVIER, 2010)In this work, a series of composite polymer electrolytes (CPEs) basically constituted by polyacrylonitrile (PAN) and a clay, montmorillonite (Bentonite), as filler have been developed, in which the clay in its lithiated ...
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(2010)In this work, a series of composite polymer electrolytes (CPEs) basically constituted by polyacrylonitrile (PAN) and a clay, montmorillonite (Bentonite), as filler have been developed, in which the clay in its lithiated ...
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(Taylor and Francis Inc., 1998)Interpolymer complex (IC) formation between poly(ethylene-co-maleic acid) and poly(4-vinylpiridine) (P4VPy) has been observed and characterized. Data from viscosity, infrared spectroscopy and thermogravimetric analysis ...
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(2012)Intramolecular charge transfer interaction between the electron donor and electro acceptor units within the polymeric structure and its optoelectronic properties were studied. The monomer, 9H-fluorene-2,7-dicarboxylic acid, ...
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Poly(ethylene oxide)s hydrophobically modified. Adsorption and spreading at the air-water interface (ACADEMIC PRESS INC ELSEVIER SCIENCE, 2006-07-01)A comparative study of spread and adsorbed monolayer of poly(ethylene oxide)s of different molecular weight hydrophobically modified with alkyl isocyanates of different length chain is reported. The modification of the ...
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(AME Publishing Company, 2017)
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(Wiley, 2018)Poly(lactic acid) (PLA) is a biodegradable and biocompatible polyester widely used in biomedical applications. Unfortunately, this biomaterial suffers from some shortcomings related with the absence of both bioactivity and ...
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(Elsevier Ltd, 2015)Poly(lactic acid) (PLA) composites with titanium oxide (TiO2) ~ 10-nm nanoparticles were produced by the melting process and their main properties were evaluated. The nanoparticles are homogeneously dispersed in the matrix ...
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(Elsevier, 2015)Poly(lactic acid) (PLA) composites with titanium oxide (TiO2) similar to 10-nm nanoparticles were produced by the melting process and their main properties were evaluated. The nanoparticles are homogeneously dispersed in ...
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(0887-624X, 2005-10-15)The free-radical copolymerization of N-phenylmaleimide (N-PhMI) with acrylic acid was studied in the range of 25-75 mol % in the feed. The interactions of these copolymers with Cu(H) and Co(H) ions were investigated as a ...
