Browsing by Title Facultad de Ciencias
Now showing items 7993-8012 of 8178
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(Universidad de Chile, 2019)
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(Springer, 2013)Rationale Neuronal nicotinic acetylcholine receptors (nAChRs) are pharmacological targets that have recently been implicated in the reinforcing effects ofmany drugs of abuse, including ethanol. Varenicline and cytisine ...
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(Universidad de Chile, 2011)
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(Universidad de Chile., 1979)
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(Universidad de Chile, 2016)
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(Universidad de Chile, 2011)
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(Universidad de Chile, 2009)Esta tesis tubo como objetivo central estudiar en que medida las diferencias en temperaturas, precipitaciones y heterogeneidad temporal del ambiente (e.g., estacionalidad de la dieta) que enfrentan las poblaciones afecta ...
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(2017)En reptiles, los fenómenos de poliploidía se relacionan generalmente con hibridación interespecífica, en ocasiones asociada a poblaciones unisexuales partenogenéticas. En Chile, el lagarto Liolaemus chiliensis es una especie ...
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(Entomological Society of America, 1997)Aphid genotype has been shown to be a source of variability in the induction of phytochemical responses in wheat after aphid infestation as well as in their performance on wheat lines. Two clones of the aphid Sitobion ...
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(2012)Phylogenetic diversity (PD) is commonly calculated by adding together the branch lengths or ages of a subset of taxa present in an area, using a single phylogeny as a backbone. However, a phylogenetic hypothesis is the ...
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(BLACKWELL VERLAG GMBH, 2004-08)The ability to assess and respond to predation risk is a strong selective force. Detection of predators is carried out by one or more sensory modalities, but the use of chemoreception has significant advantages. This study ...
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(Universidad de Valparaíso, 2015)The chain of islands including Desertores, Apiao and Quemchi located in the Inner Sea of Chiloé, in northern Chilean Patagonia (41°- 44°S), acts as a natural barrier for the flux of water in the north-south direction, ...
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(2010-04-06)The aim of this study was to investigate, during the summer of the year 2008, the variation in leaf water and photosynthetic characteristics of Eucryphia cordifolia Cav. (Cunoniaceae) along its broad latitudinal ...
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(National Academic Sciences, 2016)Loss of megafauna, an aspect of defaunation, can precipitate many ecological changes over short time scales. We examine whether megafauna loss can also explain features of lasting ecological state shifts that occurred as ...
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(Elsevier, 2020)Antimicrobial compounds are found in a range of environments as pollutants. Here, we evaluated the influence of two common anions, NO3- and PO43-, on ciprofloxacin adsorption on humic acid/ferrihydrite composite (HADIG/Fh), ...
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(Universidad de Chile, 1995)
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(Universidad de Chile, 2010)El lago Budi (38" 52'S; 73" 18'W), se encuentra en la región de La AraucanÍa (lX) de nuestro país. En la comuna de Puerto Saavedra, se sitúa cerca de la costa y se conecta esporádicamente al mar mediante el río Budi. ...
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Variaciones de la vegetación y clima en Patagonia Norte y Centro desde el último máximo glacial (Universidad de Chile., 2014)En la siguente tesis presento dos registros de polen y carbon fosil a partir del analisis de testigos de sedimento obtenidos desde los lagos Teo (42°54´S, 72°42´0) y Edita (47°8´S72°25´0), ubicados en los sectores de ...
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(Universisdad de Chile, 2012)Las actuales variaciones climáticas y la actividad humana podrían estar alterando las condiciones ambientales en la península Antártica. Junto a esto, se ha documentando una reducción del tamaño poblacional del Krill ...
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(Universisdad de Chile, 2014)La estrategia reproductiva en una planta corresponde a la combinación de una serie de adaptaciones que dan cuenta de los mecanismos y procesos por medio los cuales se realiza la reproducción sexual. El sistema reproductivo ...