Browsing by Title Facultad de Ciencias
Now showing items 796-815 of 8192
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(Universidad de Chile, 2024)El trabajo de esta tesis consiste en el estudio de la acción de los grupos de automorfismos de superficies de Riemann compactas sobre el conjunto de puntos de Weierstrass de las superficies. Se obtiene de esta acción, una ...
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(Marcel Dekker Inc., 1997)
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(2012)Most neurodegenerative diseases involve the accumulation of misfolded proteins in the nervous system. Impairment of protein degradation pathways such as autophagy is emerging as a consistent and transversal pathological ...
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(1979)Autoradiographic labelling has been employed to analyze the morphogenesis of the neostriatum. Pregnant rabbits received a single intraperitoneal injection of tritiated thymidine at different stages of gestation. Careful ...
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(Universidad de Chile, 2016)
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(2013)Background: Birds are important mobile link species that contribute to landscape-scale patterns by means of pollination, seed dispersal, and predation. Birds are often associated with habitats modified by small mammal ...
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(2004)Depending on the mosaic of habitats that is created, forest fragmentation can reduce the abundance and diversity of forest birds. Temperate deciduous forests in South America are rapidly being replaced by pine plantations, ...
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(ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD., 2016)The avifauna of Chile is relatively depauperate, comprising 469 extant species, of which 213 are terrestrial. However, the Coquimbo Region presents a broad ecological transition from the hyperarid Atacama Desert to the ...
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(Universidad de Chile, 2019-05)La invasión reciente de Harmonia axyridis (Coleoptera: Coccinellidae) a Chile ha generado problemas diversos, incluyendo la disminución de la diversidad de coccinélidos, específicamente la disminución de coccinélidos ...
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(Wiley & Sons, 2016)The optic tectum in birds and its homologue the superior colliculus in mammals both send major bilateral, nontopographic projections to the nucleus rotundus and caudal pulvinar, respectively. These projections originate ...
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(Pergamon Journals LId, 1986-11-11)The stem bark of Oxandra ef. major, whieh eontains large amounts of 7,7'-bisdehydroaporphine alkaloids, has also yielded three eommonplaee steroids, retieuline, four known aporphinoids and the new azafluorenones darienine, ...
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(Chemical Society, 1986-05-13)The structure elucidation of dragabine (1) and nordragabine (2), the first derivatives of the novel azahomoaporphine skeleton, isolated from Guatteria sagotiana and Meiogyne virgata (Ann¡onaceae), is reported.
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(Sociedad Chilena de Quimica, 2001)In addition to azorellanol a new diterpenoid 7-deacetylazorellanol, has been isolated from the aerial parts oiLaretia acaulis (Cav.) Gill et Hook (Umbelliferae). Its structure was based on spectroscopic comparison with ...
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(Elsevier Ltd, 1998)A new diterpenoid, azorellanol (5), was isolated from the whole plant of Azorella compacta (Umbelliferae). The stricture was established by using mainly one- and two-dimensional NMR techniques, whereas the absolute ...
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(Universidad de Chile, 1988)
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(Universidad de Chile., 1983)Se analizó, mediante colorimetría el contenido de Hx en extractos etéreos de maíz LH rinconada. Se encontró desde niveles no detectables (< 3 mg/Kg TF) en frutos no germinados hasta sobre un 20 % del peso seco en nomófilos ...
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(Universidad de Chile, 1983)
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(Universidad de Chile, 2008)
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(Universidad de Chile, 2004)
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(Universidad de Chile, 1994)En esta tesis se realizo un análisis critico del valor de muestras areas silvestres protegidas para la mantención de la diversidad de mamíferos. Específicamente, se analiza la representación de la mastofauna