Browsing by Title Facultad de Ciencias
Now showing items 3698-3717 of 8178
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(2003)We investigated the effects of forest patch size on the behaviour of birds feeding on the fower nectar of the proteaceous tree Embothrium coccineum J. R. et G. Forster, which is typically restricted to forest edges in ...
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(Nature, 2020)Fatty acids have been widely used as trophic biomarkers in marine mammals. However, for the South American sea lion, the most abundant otariid in the eastern South Pacific, there is no information about blubber fatty acids ...
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(2008)This paper analyzes recursive and rolling neural network models to forecast one-step-ahead sign variations in gold price. Different combinations of techniques and sample sizes are studied for feed forward and ward neural ...
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(AAGR Aerosol and Air Quality Research, 2018)© Taiwan Association for Aerosol Research. We present the results of a neural network model designed for the forecasting of hourly PM2.5 concentrations in Santiago, Chile. The study focuses on the observed values at two ...
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(Asociacion Paleontologica Argentina, 2017)Many dinosaur skeletons show evidence of behavior, including feeding, predation, nesting, and parental care. The resting posture of the forelimbs has been studied in some theropod species, in relation to the acquisition ...
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(Elsevier, 2003)Fragmentation of forest landscapes can raise the intensity of nest predation by increasing the abundance and richness of generalist or introduced predators. Understory foraging birds, such as rhinocryptids, can be highly ...
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(Wiley, 2018-07)The diversity and distribution of the genetic variation in forest phytophagous insect populations can be highly sensitive to forest fragmentation. This should be particularly evident for monophagous insects living on ...
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(2012)The need for conservation outside protected areas has prompted the modifi cation of productive practices to allow the maintenance of wild biota in productive landscapes such as those associated to timber production. Forest ...
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Foreword (Taylor & Francis Group, 2010)
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(Universidad de Chile, 2015)
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(Universidad de Chile, 2010)
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Formación de nanoestructuras de Au y Ag por pirolisis de cristales de compuestos de inclusión de ... (Universidad de Chile, 2017)
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(Universidad de Chile, 2008)El estudio establece evidencias sobre la presencia del fenómeno de fin de semana basadas en información recopilada por la red oficial de monitoreo de calidad del aire de Santiago, A partir de estos análisis, se encontró ...
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(TAYLOR & FRANCIS LTD, 2010)This work presents the preparation of copper nanoparticles (CuNPs), using as support, inclusion compounds (ICs) formed by a-cyclodextrin (a-CD) with alkylamines as guests. These ICs provide a suitable environment to ...
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(Springer, 2016)In the last decades, nanoparticles have been of great research interest due to their unique quantum size effect and optical, electronic, magnetic, and supramolecular properties. In recent year, the face-selective adhesion ...
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(1998)Segregation and proliferation of mitochondria, leading to formation of the teloplasms (pole plasms), were studied in eggs of the leech T. rude by immunocytochemistry, fluorescent time lapse video imaging, confocal and ...
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Formation of posterior cranial placode derivatives requires the Iroquois transcription factor irx4a (ACADEMIC PRESS INC ELSEVIER SCIENCE, 2008-12-06)Members of the Iroquois (Irx) homeodomain transcription factor gene family have been implicated in a variety of early developmental processes, including neural pre-patterning, tissue differentiation, neural crest development ...
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(Universidad de Chile, 1979)El propósito de este trabajo es generalizar la trasformada de Fourier clásica sobre R+
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(Universidad de Chile, 1976)
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(Universisdad de Chile, 1999)La mantencion del balance entre adquisición y gasto de energía es critico para la sobre vivencia y éxito reproducido de los organismos. Este balance depende de la interacción entre adquisición de materia u energía, su ...