Browsing by Title Artículos de revistas
Now showing items 2516-2535 of 4968
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(Sociedad de Neurología, Psiquiatría y Neurocirugía, 2010-03-03)El constante aumento en la expectativa de vida en la población mundial ha incrementado la preocupación hacia la búsqueda de la comprensión de la Enfermedad de Alzheimer (EA), así como de su diagnóstico temprano y tratamiento. ...
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(1990)The extract of the aerial parts of Gutierrezia espinosae gave 11 new and two known labdanes as well as five new nerylgeraniol derivatives. The structures were elucidated by high field 1H NMR spectroscopy. The chemotaxonomic ...
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(2002)A chemical study of aerial parts of Haplopappus illinitus afforded five labdane diterpenoids whose structures were elucidated by high field NMR spectroscopy and 2D techniques. Four of them are dicarboxylic acids previously ...
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(Natl Research Council of Canada, 1996)The marine gastropod mollusk *Trimusculus peruvianus collected on the coast of Central Chile yielded four new labdane metabolites. The structural elucidation of all compounds was accomplished by spectral analysis. One ...
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(Blackwell Publishing Ltd, 1997)Aphid infestation triggered a significant induction of hydroxamic acids (Hx) in wild wheat Triticum uniaristatum seedlings in comparison to control seedlings. We hypothesized that indirect costs of Hx induction (expressed ...
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(Soc Int Odonatologica, 2017-06)Pantala flavescens is the most widespread odonate on Earth, absent only in Antarctica and parts of Europe. A recent study performed with sequences of mtDNA suggested the presence of one panmictic population of the species ...
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(2007)We analyze the surface circulation of the coastal waters of the Humboldt Current system based on five Lagrangian satellite-tracked drifters (three launched on January 2005 and two on January 2006) deployed at 30{ring ...
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(1992)In this work the inverse problem of the variational calculus for systems of differential equations of any order is analyzed. It is shown that, if a Lagrangian exists for a given regular system of differential equations, ...
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(Wiley Periodicals, 2013)The isthmic complex is part of a visual midbrain circuit thought to be involved in stimulus selection and spatial attention. In birds, this circuit is composed of the nuclei isthmi pars magnocellularis (Imc), pars ...
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(Springer Netherlands, 2018)© 2017, Springer Science+Business Media B.V. Landfill fires are relatively frequent incidents that can result in severe environmental impacts. On the morning of January 15, 2016, a fire occurred at the Santa Marta landfill ...
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(Frontiers Media, 2016)In this paper we address a frontier topic in the humanities, namely how the cultural and natural construction that we call landscape affects well-being and health. Following an updated review of evidence-based literature ...
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(Chunli BAI, Sishen XIE, Xing ZHU, 2007-03-15)
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(2009)Complexes of Europium(III) and Terbium(III) with 2,2-bipyridine and 1,10-phenanthroline were inserted into Na-bentonite by ion exchange reactions at room temperature. The products display interlaminar distances and ...
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(Elsevier , Science Ltd., 2008-09-28)Complexes of Europium(III) and Terbium(III) with 2,2-bipyridine and 1,10-phenanthroline were inserted into Na-bentonite by ion exchange reactions at room temperature. The products display interlaminar distances and ...
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(European Geosciences Union&the American Geophysical Union, 2014)Abstract. Propagation of large-amplitude waves in plasmas is subject to several sources of nonlinearity due to relativistic effects, either when particle quiver velocities in the wave field are large, or when thermal ...
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(ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD, 2004-09)Although many factors have been shown to influence the evolution of species recognition signals in a wide variety of taxa, it is difficult to draw general conclusions because of fundamental differences in the morphologies ...
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(PeerJ, 2017-05-31)While large mass mortality events (MMEs) are well known for toothed whales, they have been rare in baleen whales due to their less gregarious behavior. Although in most cases the cause of mortality has not been conclusively ...
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Las instituciones religiosas en la transformación normativa contemporánea en la sexualidad en Chile (2008)Este texto analiza la relación entre orientaciones normativas de las instituciones religiosas y las prácticas sexuales de los sujetos, más precisamente los efectos de la adscripción y la observancia en contexto de ...
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(ACADEMIC PRESS INC ELSEVIER SCIENCE, 2003-11)We report multiproxy analyses of a sediment core obtained from Laguna Aculeo that spans the past 7500 years. Laguna Aculeo (33degrees50'S, 70degrees55'W) is one of the few natural inland lakes located in the Mediterranean ...
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(Elsevier B.V., 2016)© 2016 Elsevier B.V. We present a reconstruction of environmental changes from sediments of high-altitude Laguna Chepical in the subtropical Andes of Central Chile (32°16′S; 70°30′W, 3050 m a.s.l.) for the past 3100 years. ...
