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La finalidad de este ensayo es resumir y analizar la crítica a la metafísica que Hume lleva a cabo en el Enquiry concerning Human Understanding. Su tesis fundamental es que Hume acentúa fuertemente su crítica a la religión después del Treatise y que la religión que tiene en vista para su crítica ...


Velozo Farías, Raúl[La crítica a la metafísica en el First Enquiry de Hume; religión]La crítica a la metafísica en el First Enquiry de Hume; religión

Abstract. This paper deals with the so-called Stanley conjecture, which asks whether they are non-isomorphic trees with the same symmetric function generalization of the chromatic polynomial. By establishing a correspondence between caterpillars trees and integer compositions, we prove that cater...


Aliste Prieto, JoséZamora, José[Proper caterpillars are distinguished by their symmetric chromatic function]Proper caterpillars are distinguished by their symmetric chromatic function

A Density Functional microscopic model of C60, consisting of seven molecular orbitals (3 occupied and 4 empty), was employed to get the best values for the half-width and the scanning distance of the mathematical function used to obtain the theoretical DOS spectrum. It is found that the convoluti...


Gómez Jeria, Juan S.[On the use of the whole eigenvalue spectrum to obtain single molecule band structures and solid band gaps for molecular electronics studies]On the use of the whole eigenvalue spectrum to obtain single molecule band structures and solid band gaps for molecular electronics studies

Two medium-sized molecular systems X60 (X=C,N) were analyzed using Extended Hückel, Density Functional and ab initio Hartree-Fock methods. The aim of the work was to test the reliability of the EHT methodology to calculate the total Density of States distribution curve. The Extended Hückel method...


Gómez Jeria, Juan Sebastián[The limits of the extended hückel theory to calculate the total density of states of medium-sized molecules]The limits of the extended hückel theory to calculate the total density of states of medium-sized molecules

The problem of negative electronic populations and of occupation numbers greater than 2 has plagued Mulliken Population Analysis since the very beginning. Through the analysis of three model molecular systems, several basis sets and the relevant literature, we conclude that there is not enough ev...


Gómez-Jeria, Juan S.[An empirical way to correct some drawbacks of mulliken population analysis]An empirical way to correct some drawbacks of mulliken population analysis

Reactivity, selectivity and site activation are classical concepts in chemistry which are amenable to quantitative representation, in terms of static global, local and non local density response functions. The use of these electronic indexes describing chemical interconversion is developed in thi...


Pérez, PatriciaParra-Mouche, JuliaContreras, Renato R.[Quantitative representation of reactivity, selectivity and site activation concepts in organic chemistry]Quantitative representation of reactivity, selectivity and site activation concepts in organic chemistry

The photochemical behavior of nimodipine (NIMO) and felodipine (FELO), photolabile drugs widely used as antihypertensive calcium channel blockers, is studied in constrained media. Specifically, we are interested in the kinetic analysis of 4-aryl-1,4-dihydropyridine photodegradation processes when...


Brito, JulioPozo, AndrésGarcía, CristóbalNúñez-Vergara, Luis J.Morales, JavierGünther, GermánPizarro, Nancy[Photodegradation of nimodipine and felodipine in microheterogeneous systems]Photodegradation of nimodipine and felodipine in microheterogeneous systems

The lichen Pseudocyphellaria nudata is a species endemic to southern South América. From the lichen tallus, methyl orsellinate, 2-methoxy-3,6-dimethyl-4-hydroxybenzaldehyde, methyl-evernate, tenuiorin, hopan-6ß,22-diol and hopan-6α,76,22-triol were isolated and identified as the main lichen const...


Cuellar, M.Quilhot, W.Rubio, C.Soto, C.Espinoza, L.[Phenolics, depsides and triterpenes from the chilean lichen pseudocyphellaria nudata (zahlbr.) D.J. Galloway]Phenolics, depsides and triterpenes from the chilean lichen pseudocyphellaria nudata (zahlbr.) D.J. Galloway

The theoretical global and local electrophilicity patterns of substituted and chelated 4-oxo-4H-benzopyran-3-carbaldehydes (formylchromones) have been evaluated using the electrophilicity index proposed by Parr et al [J. Am. Chem. Soc. 1999, 121, 1922]. The complexation of formylchromones with al...


Araya Maturana, RamiroHeredia Moya, JorgeEscobar, Carlos A.Pérez, Patricia[On the reduction of 4-oxo-4h-benzopyran-3-carbaldehydes : global and local electrophilicity patterns]On the reduction of 4-oxo-4h-benzopyran-3-carbaldehydes : global and local electrophilicity patterns

Safrole from sassafras oil (Ocoteapretiosa Mez., Lauraceae), is an abundant natural product showing interesting functionality and chemical structure. Starting from safrole, nine derivatives were prepared and assessed for antiproliferative effect using different human cell lines. The in vitro grow...


Espinoza Catalán, LuisMadrid Villegas, AlejandroTaborga Liber, LautaroVillena García, JoanCuellar Fritis, MauricioCarrasco Altamirano, Héctor[Synthesis of nine safrole derivatives and their antiproliferative activity towards human cancer cells]Synthesis of nine safrole derivatives and their antiproliferative activity towards human cancer cells

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