Browsing by Title Facultad de Ciencias
Now showing items 8138-8157 of 8280
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(Universidad de Chile, 2004)Se ha desarrollado un experimento de Jardín Común de la planta anual Chaetanthera moenchioides, a partir de semillas provenientes desde un gradiente latitudinal-climático dentro del ambiente mediterráneo chileno (30oS-36°S), ...
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(Universidad de Chile., 2010)La variación geográfica fenotipicas es el resultado de la interacción de factores históricos y ecológicos, cuyo efecto diferenciadores pueden ser influidos por la geografía y los ambientes desde las poblaciones se distribuyen. ...
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(Universidad de Chile, 2024)A un nivel intraespecífico, la variación geográfica entre individuos de distintas poblaciones puede asociarse a las interacciones entre distintos factores ambientales. De este modo rangos de distribución amplios se ...
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Variación morfológica y de rasgos de historia de vida en post-metamórficos de Rhinella spinulosa ... (Universidad de Chile, 2014)
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(Universidad de Chile, 2019-09)Los ambientes urbanos poseen características particulares en comparación con los hábitats silvestres que limitan la sobrevivencia de ciertas especies. Sin embargo, algunas aves han logrado persistir dentro de los ambientes ...
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(Universidad de Chile, 2003)Bufo spinulosus es un anfibio que se distribuye ampliamente en los Andes Peruano-Boliviano y Argentino, mientras que en Chile se pueden encontrar poblaciones distribuidas en el Norte Grande y Centro del país, presentando ...
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(Universidad de Chile, 1990)
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(Universidad de Chile, 2011)
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(Universidad de Chile, 2019)The activity patterns of bats are determined by various environmental factors, including the intensity of moonlight. In this regard, some species reduce their levels of activity during brighter nights, a phenomenon known ...
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(Wiley, 2017)The distribution of suitable habitat influences natal and breeding dispersal at small spatial scales, resulting in strong microgeographic genetic structure. Although environmental variation can promote interpopulation ...
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(Frontiers Media, 2022)The giant kelp Macrocystis pyrifera is a cosmopolitan species of cold-temperate coasts. Its South-American distribution ranges from Peru to Cape Horn and Argentina, encompassing a considerable temperature gradient, from ...
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(Universidad de Chile, 2018-10)Las invasiones biológicas son una de las principales amenazas para la biodiversidad en todo el mundo; una forma de entender por qué algunas especies son más invasoras que otras, es analizando sus rasgos fenotípicos (o ...
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(2003)A study was performed on the variation of the electrophilicity index along the reaction path. Implications within the widely used finite difference approximation for density-functional based reactivity descriptors, their ...
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(Elsevier Ltd, 1997)
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(Springer, 2013)This study investigates the variations in the chemical profile, free radical scavenging, antioxidant and gastroprotective activities of licorice extracts (LE) from plants harvested during the months of February to November. ...
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(1986)Examination of six samples of the red alga P. cartilagineum collected along 1600 km of Central Chilean coast yielded a number of polyhalogenated monocyclic monoterpenes. Acyclic compounds were not found. Two common compounds ...
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(Natural Product Incorporation, 2014)Ethanol extracts from dried leaves of wild Lepechinia salvia (Lindl) Epling, collected during the flowering period (September-November), contained 15% to 25% carnosic acid and 2 to 8% carnosol, depending on the month of ...
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(1974)The inversion of Rayleigh wave dispersion data for the Pacific Ocean shows that lithospheric thickness increases systematically with age. The lid to the low-velocity channel is very thin or absent near the ridge crest; the ...
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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 ...
