Browsing by Title Facultad de Ciencias
Now showing items 4077-4096 of 8178
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(SAGE, 2009)The historical behaviour of Cipreses glacier from the nineteenth through the early twentieth century is described based on written records, cartography, iconography and photographs. These data allow us to infer that the ...
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(Andean Geology, 2016)Two Holocene tephras encountered in outcrops, cores and trenches in bogs, and lake cores in the area around Cochrane, southern Chile, are identified (based on their age, tephra glass color and morphology, mineralogy, and ...
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(Universidad de Chile, 1992)
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(Universidad de Chile, 2012)La identidad de Los tres dígitos del ala de las aves ha sido un tema de gran discusión entre biólogos del desarrollo y paleontólogos durante más de 140 años. por una parte, basándose en el patrón de desarrollo de los ...
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(Universisdad de Chile, 2003)Todos los organismos vivos requieren cobre para su crecimiento y normal desarrollo.Por su alto potencial redox, el cobre es un factor esencial para una gran variedad de proteínas metabólicas. Debido al escaso conocimiento ...
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(ELSEVIER, 2006-06-24)We propose and test a new reactivity index tentatively called homofugality, to quantitatively rank the leaving group ability of radical fragments present in homolytic substitution reactions. The model is validated for a ...
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(European Mathematical Society, Suiza, 2022)Let q be a non-negative integer. We prove that a perfect field K has cohomological dimension at most q + 1 if, and only if, for any finite extension L of K and for any homogeneous space Z under a smooth linear connected ...
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(Universidad de ChileUniversidad de Chile, 2014)
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(Universidad de Chile, 2014)
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(2002)Competition between phytophagous insects could be mediated by differential impact of natural enemies or by induced changes in host plant quality. The interaction between the aphids Sipha flava and Rhopalosiphum maidis on ...
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(2002)Induced plant responses may affect the behaviour and growth of the attacking herbivore insect. The aphid Sipha flava (Forbes) produces reddish spots on the infested leaf of its host plant Sorghum halepense (L.). In order ...
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(2012)The mistletoe Tristerix verticillatus (Loranthaceae) parasitizes within a small area of the Yerba Loca Nature Sanctuary near Santiago, Chile, three co-occurring hosts: Schinus montanus (Anacardiaceae), Fabiana imbricata ...
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(2005)Decision-making during host selection by phytophagous insects has proved to be related to host range, with specialists taking faster decisions than generalists; however, this pattern fails to materialize in some host ...
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(Springer, 2010)Host-plants can mediate the interactions between herbivores and their mutualists and also between parasitic plants and their mutualists. The present study reveals how a hemiparasitic plant parasitizing three host species ...
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(Kluwer Academic/Plenum Publishers, 1999)Extractable metabolites from leaves (EM) and volatiles released from six Nothofagus species were analyzed by TLC and GC-MS, respectively. Aphids of the genus Neuquenaphis, closely associated to Nothofagus, were sampled on ...
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(Wiley, 2018)In recent decades, there has been a significant increase in economic losses caused by flood events on the coastal region of south-eastern Spain. The increase of extreme rainfall events forecast by the climate change models ...
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(Springer, 2014)Habitat fragmentation and degradation are important biodiversity change drivers worldwide. Their effects have been described for many animal groups, but little is known about marsupials. We conducted a meta-analysis ...
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(American Chemical Society, 2018)© 2018 American Chemical Society. We report on several parameters that can be used to describe the 1-ethyl-3-methyl-4,5-(X2)imidazolium cations (where X = H, Br, and I) within the Canongia-Lopez and Padua Force Field (CL&P) ...
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(Royal Society Chemistry, 2017)The chemical space contains all possible compounds that can be imagined. Its size easily equals the number of fundamental particles in the observable universe. Rational design of compounds aims to find those sectors of the ...