Browsing by Title Facultad de Ciencias
Now showing items 3658-3677 of 8178
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(Universidad de Chile, 2008)lntroducción: La fisura labiopalatina no sindrómica (FLPNS) es una malformación congénita, producida por alteraciones en la fusión de procesos faciales y/o palatinos durante la vida intrauterina. Se ha postulado que en ...
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(Universidad de Chile, 2006)La variación de caracteres entre individuos de una población es un tema central en la teoría darwiniana de la Selección Natural, aún cuando los procesos involucrados en el origen de estas variaciones han recibido menor ...
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(Universitaria, 2005)
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(Universidad de Chile., 1976)E este estudio fotoquímico de la familia de los licopodaceas se ha centrado principalmente en los alcaloides y compuestos neutros (Triterpenos), debido a las características especiales que presentan.
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(Wiley Periodicals, Inc., 2013)A new procedure is described to visualize the spatial pattern of expression of proteins and mRNAs in cryosections or whole-mounted leech, Drosophila, zebrafish, and chick embryos. Our principal contribution is in the use ...
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(Nature Publishing Group, 2017)We experimentally study a Stub photonic lattice and excite their localized linear states originated from an isolated Flat Band at the center of the linear spectrum. By exciting these modes in different regions of the ...
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(American Physical Society, 2015)We examine the effect of adding PT-symmetric gain and loss terms to quasi-one-dimensional lattices (ribbons) that possess flat bands. We focus on three representative cases: the Lieb ribbon, the kagome ribbon, and the stub ...
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(Pergamon Press Ltd., 1992-08-21)The rare dihydroquercetin 3-0-/3-0-xyloside, caryatin 7-0-/3-0-glucoside and the previously unknown 6-methoxylated flavonoid glycoside jaceidin 5-0-/3-0-glucoside were isolated from twigs of Eucryphia glutinosa where they ...
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(1982)
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(Universisdad de Chile, 2006)Tradicionalmente se ha sostenido que el principal desecho nitrogenado de aves es el ácido úrico, constituyendo entre 55-72% del total del nitrógeno excretado en la orina, mientras que el amonio, entre 6-23% y la urea, entre ...
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(Universidad de Chile.Universidad de Chile., 2013)La plasticidad fenotipica, podría ser fundamental para la persistencia de la poblaciones y/o especies, especialmente cuando las condiciones ambientales cambian en el curso de vida de los organismos, y/o cuando los rangos ...
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(AMER ORNITHOLOGISTS UNION, 2011-01)We assessed how individual foraging preferences and cognitive performance affect foraging bout interval and the flexibility of foraging behavior in the nectarivorous Green-backed Firecrown (Sephanoides sephaniodes). Our ...
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(Swiss Botanical Society, 2012-11-20)In the alpine life-zone, increasingly slower and unpredictable pollination at the higher altitudes predict an increase in floral investment in strongly outcrossing, pollenlimited biotically pollinated plant species, but ...
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(2011)Floral damage can reduce flower attractiveness for pollinator service. However, the reproductive impact of flower herbivory may be contingent on a petal that is damaged. Flowers having nectar guides are expected to suffer ...
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(Springer, 2014)Floral integration may result from the combined effects of pollinator-mediated selection, genetic correlations and abiotic factors. Thus, by sampling a set of populations in the field and examining their variation of floral ...
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(Universidad de Chile, 1970)
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(2008)Peatlands are globally known as major deposits of fresh water and carbon, affecting the planet's weather and local hydrology; for bearing unique plant and animal species, contributing to biodiversity; and because they ...
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(Blackwell Publishing Ltd, 1994)
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(MDPI, 2021)Delayed flowering due to later snowmelt and colder temperatures at higher elevations in the alpine are expected to lead to flowering phenological adjustment to prevent decoupling of peak flowering from the warmest time of ...