Browsing by Title Facultad de Ciencias
Now showing items 8056-8075 of 8176
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(Elsevier GmbH, 2018)© 2018 Background: Xenophyllum poposum is an endemic species of the Andes Cordillera, popularly known as Popusa. Popusa is widely used by mountain communities as a folk medicine to treat altitude sickness and hypertension. ...
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(1995)1. 1. A novel vasorelaxant effect of clonixinate of l-lysine (Clx), analgesic and anti-inflammatory, was studied in rat aortic rings. 2. 2. Clx completely relaxed aortic rings contracted by KCl 70 mM and together with its ...
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(2009)The absolute configuration of the pentacyclic ichthyotoxin stypotriol, a constituent of Stypopodium zonale, was deduced to be 3S,5R,8R,9R,10S,13S,14S-(-) -1 by vibrational circular dichroism spectroscopy of the derived ...
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(Universidad de Chile, 2006)
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(Elsevier, 2015)Disentangling the roles of paleofires and explosive volcanism from climatic drivers of past vegetation change is a subject insufficiently addressed in the paleoecological literature. The coastal region of the Chilo e ...
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(Academic Press, 1999)We describe the changes in plant cover, species richness, and flowering after rainfall over an entire growing season (September 1989-January 1990) in a southern Atacama Desert site in Chile. One month after the rain, ...
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(2002)Research in pristine forests provides a necessary reference of energy and nutrient cycling in absence of anthropogenic influence. Therefore two unpolluted watersheds in the Cordillera de Piuchué of southern Chile (42°30′ ...
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(2012)Pollen and charcoal analysis from Laguna San Pedro (38°26'S, 71°19'W), a small closed-basin lake located within the present-day distribution of Araucaria- Nothofagus forest in the Temperate-Mediterranean Transition zone ...
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(Elsevier, 2014)We present a detailed record from Lago Lepué to examine vegetation, climate and fire-regime changes since the Last Glacial Maximum (LGM) in central-east Isla Grande de Chiloé (43°S), northwestern Patagonia. Precipitation ...
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(2011)Morus alba and Morus multicaulis, common ornamental species in Chile, were studied regarding their growth and dry matter production. In Santiago (Metropolitan Region), plants from vegetative propagation, one part growing ...
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Velocidad de invasión de la solución fundamental de una ecuación subdifusiva con término de reacción (Universidad de Chile, 2024)
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(Universidad de Chile, 2007)
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(Universidad de Chile, 2017)Este trabajo se desarrollé en la empresa manufacturera de ladrillos Cerámica Santiago S.A. Los objetivos fueron la verificación del cumplimiento de la norma vigente para gases y material particulado; regularizar el uso ...
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(Universidad de Chile, 2015)Se optimizó un método analítico para la determinación de metales pesados por espectrómetrometría de emisión óptica con plasma acoplado inductivamente (lCP-OES), la importancia del análisis de metales pesados se debe a que ...
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(Universidad de Chile., 1980)Se ha investigado la versión Epstein Neshet en teoría de perturbación de Rayleigh Schrodinger para el cálculo de la primera hiperpolarizabilidad dipolar eléctrica B en un conjunto de moléculas orgánicas mediante el método ...
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(Universidad de Chile, 1978)Este Trabajo se inspira en las ideas originales de pontryagin [1] y en el articulo de Kushner [5], pero su planteamiento y resultados son nuevos
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(2008)The structural elucidation of natural products and complex organic molecules relies heavily on the application of proton detected heteronuclear NMR. Among these techniques, the HMBC NMR experiment remains as the most popular ...
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(Universidad de Chile, 2013)Se desarrolla el estudio de tres teorías inspiradas en la gravedad de Eddington. La teoría Eddington-Born-Infeld (EBI) presenta singularidades en su curvatura cuando se modelan objetos compactos por materia descrita por ...
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(Universidad de Chile, 2022)Con una población global estimada en 2.000 individuos entre Argentina y Chile, menos del 1% de su población histórica, el huemul Hippocamelus bisulcus está categorizado como "En peligro". El objetivo de este estudio fue ...
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(Elsevier, 1999)The IR spectra of the M(mnt)(baba) where M = Ni and Pd, mnt = 1,2-maleonitrile and baba = biacetylbisanyline, were recorded in the high as well in the low energy region. A complete assignment of the observed bands was ...