Repositorio Académico de la Universidad de Chile: Recent submissions
Now showing items 32541-32560 of 98940
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(Elsevier B.V., 2019)In this work, precipitation and sol-gel mixed procedures were used to prepare a TiO2@Fe3O4 nanocomposite. The X-ray diffraction (XRD)and selected area electron diffraction (SAED)results unmistakably elucidated the tetragonal ...
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(Academic Press, 2019)In the hyperarid Atacama Desert (Northern Chile), the economic and social development is supported using fossil groundwater. The groundwater extraction (GWE)has significantly increased over the last 30 years, reaching ∼4.2 ...
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(Taylor and Francis Ltd., 2019)A rapid screening method is described for the determination of paralytic shellfish toxins (PST), in fresh marine vectors (bivalves and gastropods), at levels ranging from 0.05 to 5.0 mg STX-eq kg−1. PST are extracted from ...
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(Routledge, 2019)This article is concerned with the influences that are brought to bear on the design of school buildings and the effects that the design of these buildings have on those who teach and learn in them. The article also focuses ...
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(Pontificia Universidad Catolica de Chile, 2019)This study was aimed at analyzing, based on the participating teachers' emotional experience, the meanings constructed by them regarding the task of responding to diversity. To do this, the researchers analyzed 12 interviews ...
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Graphene/nickel oxide nanocomposites against isolated ESBL producing bacteria and A549 cancer cells (Elsevier Ltd, 2019)The synthesis of nickel oxide nanoparticles (NiO NPs)and graphene/nickel oxide nanocomposites (Gr/NiO NCs)was performed using a simple chemical reduction method. Powder X-ray diffraction (XRD)and thermogravimetric analysis ...
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(Society for Industrial and Applied Mathematics Publications, 2019)We characterize the subdifferential of the supremum function of finitely and infinitely indexed families of convex functions. The main contribution of this paper consists of providing formulas for such a subdifferential ...
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(Sociedad Chilena de Obstetricia y Ginecologia, 2019)Background: Adolescents who engage in sexual activity in a non-romantic relationship may develop patterns of sexual activity that lead to negative health outcomes such as unplanned pregnancy, sexually transmitted infections, ...
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(Elsevier Ltd, 2019)Aggregation operators consist of mathematical functions that enable the combining and processing of different types of information. The aim of this work is to present the main contributions in this field by a bibliometric ...
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(Frontiers Media S.A., 2019)Copyright © 2019 Robledo, Gutiérrez, Barría, Lhorente, Houston and Yáñez.Sea lice (Caligus rogercresseyi) are ectoparasitic copepods which have a large negative economic and welfare impact in Atlantic salmon (Salmo salar) ...
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(AIDEP, 2019)Early identification of children who may have a mental health problem is essential to implement preventive and treatment actions. In order to do this, it is necessary to have valid instruments adapted to the characteristics ...
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(Cambridge University Press, 2019)The study of the stone sculpture production process is subject to the preservation and visibility of tool traces and surface finishes. In this article it is proposed that the parameters developed in conservation for the ...
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(NLM (Medline), 2019)Hypoxia, a common condition of the tumor microenvironment, induces changes in the proteome of cancer cells, mainly via HIF-1, a transcription factor conformed by a constitutively expressed β-subunit and an oxygen-regulated ...
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(MDPI AG, 2019)Nitric oxide-releasing aspirins (NO-aspirins) are aspirin derivatives that are safer than the parent drug in the gastrointestinal context and have shown superior cytotoxic effects in several cancer models. Despite the ...
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(Springer Verlag, 2019)We consider the Cauchy problem for the energy critical heat equation {ut=Δu+|u|4n−2uinRn×(0,T)u(⋅,0)=u0inRn in dimension n = 5. More precisely we find that for given points q 1 ,q 2 ,..,q k and any sufficiently small T ...
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(Springer Verlag, 2019)Extreme environments are a unique source of microorganisms encoding metabolic capacities that remain largely unexplored. In this work, we isolated two Antarctic bacterial strains able to produce poly(3-hydroxyalkanoates) ...
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(MDPI AG, 2019)This paper proposes a low-complexity small signal model for a 3-leg converter connected to a balanced three-phase, three-wire weak grid and synchronised to this grid using a PLL implemented in a synchronous rotating d-q ...
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(Magnolia Press, 2019)A new fossil cycad species, Sueria laxinervis, is described from the Upper Cretaceous (Maastrichtian) Quiriquina Formation in Cocholgüe, Bíobío Region, Chile. The generic assignment is supported by the taeniopterid-type ...
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(Wiley-Blackwell, 2019)Background: Encapsulation of Porphyromonas gingivalis has been demonstrated as responsible of several host immunological changes, which have been associated with the pathogenesis of periodontitis. Using a murine model of ...
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(Palgrave Macmillan Ltd., 2019)Using a panel data set for international corporate bonds and capital account restrictions in advanced and emerging economies, we show that restrictions on capital inflows produce a substantial and economically meaningful ...
