Browsing by Title Facultad de Ciencias
Now showing items 7420-7439 of 8181
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(Universidad de Chile, 1990)
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(Universidad de Chile, 1986)Basándonos en una idea debida a Hirsch y Nazenko desarrollamos un método perturbativo aplicable al grupo de renormalización para sistemas definidos en redes a temperatura cero
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(Universidad de Chile, 1971)
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(2016)Esta publicación-Ensayo se relaciona con la Teoría de la Conexión o Relación entre el Espacio de Polinomios y las Series Infinitas. Y se refiere específicamente al Cálculo de los límites superiores e inferiores para ...
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(Springer, 2015)Correlations among and identification of the source volcanoes for over 60 Late Glacial and Holocene tephras preserved in eight lacustrine sediment cores taken from small lakes near Coyhaique, Chile (46 degrees S), were ...
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(Universisdad de Chile, 2012)Filamentous temperature sensitive strain Z (Ftsz) es una proteína citosoIica bacteriana que forma un anillo en la mitad longitudinal de la célula durante la división celular. Este anillo se ensambla junta a otras 10 ...
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(Universidad de Chile., 1990)La termoregulacion conductual asociada al agrupamiento de pequeños mamíferos (TCA) puede ser una respuesta eficiente a las bajas temperaturas, con importantes consecuencias en el ahorro y asignación de energía. Entre las ...
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(Springer, 2018)Life in saline environments represents a major physiological challenge for birds, particularly for passerines that lack nasal salt glands and hence are forced to live in environments that do not contain salty resources. ...
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Testing for functional convergence of temperate rainforest tree assemblages in Chile and New Zealand (Taylor & Francis, 2016)An important tenet of biogeography and comparative ecology is that disjunct assemblages in similar physical environments are functionally more similar to each other than to assemblages from other environments. Temperate ...
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(Springer, 2013)Nectar robbing may have an indirect negative effect on plant reproduction by discouraging legitimate pollinator species from visiting robbed flowers. In this study, we set up a 2 9 2 factorial design with nectar-robbing ...
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(Wiley, 2018-06)Heterozygosity has been positively associated with fitness and population survival. However, the relationship between heterozygosity and adaptive phenotypic plasticity (i.e., plasticity which results in fitness homeostasis ...
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(Springer, 2020)A dynamic thermal time model (DTTM) has been developed to predict cold-hardiness in dormant grapevine buds, which uses daily mean temperatures as the only input variable. However, it has been recently reported that ...
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(Ecological Society of America, 2017)The niche variation hypothesis (NVH) predicts that populations with broader niches should exhibit greater between- individual diet variation or individual specialization (IS) relative to populations with narrower niches. ...
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(Elsevier Ireland Ltd, 2013)Codons expanded by a silent position (quadruplet or tetracodons) may solve the conundrum that at life's origins, the weak tricodon-anticodon interactions could not promote translation in the absence of complex ribosomes. ...
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(Universisdad de Chile, 1990)El origen estadístico de la entropía de los agujeros en 4 dimensiones es un problema no resulto aun. Sin embargo en dimensiones 3, el problema puede enfrentarse usando el hecho que allí la gravitación es una teoría de ...
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(2013)Background: Odontoblasts are specialized cells that form dentin and they are believed to be sensors for tooth pain. Transforming growth factor-β1 (TGF-β1), a pro-inflammatory cytokine expressed early in odontoblasts, plays ...
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(American Chemical Society, 1986-07-29)
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(Copernicus Gesellschaft MBH, 2021)Glaciers and ice caps are thinning and retreating along the entire Andes ridge, and drivers of this mass loss vary between the different climate zones. The southern part of the Andes (Wet Andes) has the highest abundance ...
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(Pergamon Press Ltd., 1992-03-26)1. 2C-B [2-(4-bromo-2,5-dimethoxyphenyl)ethylamine] elicits concentration-dependent contraetion of the rat thoracic aorta (apparent pD2 = 4.55). The maximal contraction (Emax) attained wíth 2C-B is less than that produced ...
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(Blackwell Publishing Ltd, 1996)Microcin E492 is a polypeptide antibiotic that is produced and excreted by Klebsiella pneumoniae. Different growth conditions of the producer strain affect microcin activity. The production of a microcin antagonist is ...