Browsing by Title Facultad de Ciencias
Now showing items 8063-8082 of 8186
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(2004)We have studied the mechanism of action of three 6a(R)-1,2- methylenedioxyaporphines as vasorelaxant compounds. The alkaloids assayed showed different affinities for the three human cloned α1- adrenoceptor (AR) subtypes ...
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(2012)We compared the diversity of vines and vascular epiphytes among an evergreen forest fragment (Laureliopsis philippiana y Eucryphia cordifolia) and four fragments of secondary forest dominated for Nothofagus obliqua in an ...
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Vascular reactivity in intrapulmonary arteries of chicken embryos during transition to ex ovo life (2002)The present study aimed to characterize pulmonary vascular reactivity in the chicken embryo from the last stage of prenatal development and throughout the perinatal period. Isolated intrapulmonary arteries from noninternally ...
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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 ...