Browsing by Title Facultad de Ciencias
Now showing items 168-187 of 8173
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(1997)The population dynamics of Calanus chilensis (Copepoda: Crustacea) was analyzed using a mixture of field data and mathematical models. Field data were obtained in the Humboldt Current upwelling area, at Mejillones del Sur ...
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(2013)A small, new species of gerbil rodents of the genus Eligmodontia from the southwestern dunes of the Atacama Desert in northern Chile is described; the genus had not been reported for this western lowland region. Our ...
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(2012)Opuntia scrublands are important socio-ecological systems (SESs) in the Andean area. Opuntia provides a variety of products employed in the human diet and in animal feed, as well as cochineal insects, a highly valued source ...
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(Elsevier, 2020)In this article we introduce a nonautonomous version of the Markus-Yamabe conjecture from an exponential dichotomy spectrum point of view. We prove the validity of this conjecture for the scalar and triangular case. ...
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(1983)The preferential solvation of a solute molecule in mixed solvents is analysed in terms of the spectral solvent shifts. A spectroscopic model is developed in order to know the preferential solvation degree in the ground ...
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A statistical thermodynamics interpretation of the solvations energy within the continuum approach (Sociedad Chilena de Química, 1989-03-14)En este trabajo, se presenta una discusión sobre la naturaleza fisica de la energia de solvatación basada en un modelo termodinámico estadistico. A partir de él se puede obtener una partición completa de la energia libre ...
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(MDPI AG, 2017)A theoretical exploration about hydrogen bonding in a series of synthetic regioisomeric antitumor tricyclic hydroquinones is presented. The stabilization energy for the intramolecular hydrogen bond (IHB) formation in four ...
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(Elsevier, 1998)Atmospheric aerosol samples collected in five sites in the Metropolitan Area of Mexico City were analyzed with proton induced X-ray emission (PIXE). Stacked Filter Units (SFU) of the Davis design were employed to obtain ...
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(Elsevier, 2004)Inhalable particulate matter (PM10) concentrations were measured over 24-h intervals at six different urban sites in the city of Chill an from September 2001 to April 2003. Sampling locations were selected to represent ...
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(Elsevier, 2020)In this work, we present a solid silicon substrate functionalized with modified beta-cyclodextrin monolayers as an optimal surface for organic contaminant uptake. The inclusion and capture of three potential pollutants, ...
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(Sociedade Brasileira de Quimica, 2009)An apparatus which allows the direct measurement of the antioxidant capacity of volatiles compounds emitted from some herbs and culinary spices is described. The device comprises: a sample chamber, a mixing chamber, a pump ...
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(Springer New York LLC, 2018)© 2018, Springer-Verlag GmbH Germany, part of Springer Nature. Hydroxyl radical reduction and peroxide bond breaking in hydrogen peroxide are reactions involved in various processes such as the Fenton reaction, which has ...
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(Scholars Research Library, 2016)An analysis of the relationships between electronic structure and the inhibition of the kinase activity of VEGFR-2 was carried out for a series of 1-(4-((2-oxoindolin-3-ylidene)amino)phenyl)-3-arylureas. A similar study ...
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(Research Journal of Pharmaceutical, Biological and Chemical Sciences, 2016)Allelopathic effects of a chemical compound strongly depends on the target species, dose or concentration employed, structure of the molecule and physical properties, such as water solubility, lipophilicity and others. In ...
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(John Wiley and Sons Inc., 2009)A theoretical study of the electronic structure of the first members of the alkali metal atomic clusters series Lin to Csn (n = 2-8) has been done. The geometries of some isomers of the neutral, positive, and negative ...
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(1990)The relative thermodynamic stabilities of several ion-pair structures, including intimate and solvent-separated forms, in solution have been studied for the allyl+/F- and allyl-/Li+ model systems. The electrostatic part ...
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(Scholars Research Library, 2016)A Density Functional Theory study was carried out to find relationships between the electronic/molecular structure of a group of pyrazalone-quinazolone hybrids and their inhibition of human 4-hydroxyphenylpyruvate dioxygenase ...
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(Sociedad Chilena de Química, 2007-05-02)We present the results of a quantum chemical study of the relationship between the electronic-conformational structure of a group of thiazolidenebenzenesulfo namide derivatives (TBS) and their Immunodeficiency Type 1 Virus ...
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(Sociedad Chilena de Quimica, 2007)We present the results of a quantum chemical study of the relationship between the electronic-conformational structure of a group of thiazolidenebenzenesulfo namide derivatives (TBS) and their Immunodeficiency Type 1 Virus ...
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(2005)The reaction mechanism associated with the Bergman cyclization of the (Z)-hexa-1,5-diyne-3-ene to render p-benzyne has been analyzed by means of a combined use of the electron localization function (ELF) and the catastrophe ...