Repositorio Académico de la Universidad de Chile: Recent submissions
Now showing items 44721-44740 of 98940
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Surface-enhanced Raman scattering and theoretical study of the bilichromes biliverdin and bilirubin (Taylor and Francis Inc., 2016)© 2016, Copyright © Taylor & Francis Group, LLC. The surface-enhanced Raman scattering spectra of biliverdin and bilirubin were obtained and analyzed; a physical silver ligand interaction was inferred. The structural ...
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(Sociedad Chilena de Pediatria, 2016)© 2016 Sociedad Chilena de Pediatría. Children with special health care needs" (CSHCN) is an emerging and heterogeneous group of paediatric patients, with a wide variety of medical conditions and with different uses of ...
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(Taylor and Francis Inc., 2016)© 2016, Copyright © Taylor & Francis Group, LLC. The natural dyes lawsone and plumbagin (1,4-naphthoquinones) were studied by using fluorescence, Raman, infrared (IR), surface-enhanced Raman scattering (SERS), and ...
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(Springer Tokyo, 2016)© 2016, Springer Japan. The study of the yeasts that inhabit cold environments, such as Antarctica, is an active field of investigation oriented toward understanding their ecological roles in these ecosystems. In a great ...
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(Scholars Research Library, 2016)We employed a formal QSAR method to find the main interactions regulating the variation of the ability to inhibit the germination of Lactuca sativa seeds by a small group of phenolic acids. The same techique was employed ...
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(1990)The IR spectra of nitrobenzene-do and -ds were recorded in gas and liquid phases at 25° C and in amorphous solid phase at -170°C. The appearance of new bands and intensity changes going from liquid to solid phase spectrum, ...
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(1992)S-O stretching force constants in a series of synmetrical sulfoxide compounds were calculated from quantum chemical methods. Molecular geometries were obtained from experimental data and from MNDO and PM3 calculations. S-O ...
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(1992)A comparison of some structural aspects of these complexes with Cp Re(CO)3 are also discussed. Additionally, the preparation and characterization of the trimethyl phosphite derivative is reported. A complete vibrationalassignment ...
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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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(Universidad de Concepcion, 2015)© 2015, Universidad de Concepcion. All rights reserved. This study examines the limnology and ecology of two high altitude wetlands, Lirima (19°51’24 S; 68°55’02 W; 4000 m asl) and Caya (20°37’21 S; 68°58’28 W; 3700 m asl), ...
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(John Wiley and Sons Ltd, 2004)Theoretical electrophilicity and nucleophilicity scales, defined in terms of electronic reactivity indices, were tested for the reaction of a series of carbonates with neutral and charged reagents of varying nucleophilicity. ...
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(American Chemical Society, 2003)In this paper we describe a method to obtain estimates of the relative nucleophilicity for a series of neutral and charged electron donors from their solution phase ionization potential (Is). The relationship between ...
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(1994)A Kohn-Sham (KS) like formalism for the calculation of solvation energies of singly charged ions is presented. The approximate theory is based on a simple model that represents embedding an atomic ion into a polarizable ...
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(Springer Verlag, 2014)© 2014, Springer-Verlag Berlin Heidelberg.The mechanism of Menshutkin reaction, NH3 + CH3Cl = [CH3–NH3]+ + Cl-, has been thoroughly studied in both gas and solvent (H2O and cyclohexane) phase. It has been found that solvents ...
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(American Chemical Society, 2001)A thorough quantitative analysis of the HSAB principle is performed. Complex formation reactions of a typical soft acid, Ag+, and typical hard acid, HF, with the bases XH3 (X = N, P, As) are studied using the DFT/B3LYP ...
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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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(BioMed Central Ltd., 2016)© 2016 Mardones et al. Background: In the adult hippocampus new neurons are continuously generated from neural stem cells (NSCs) present at the subgranular zone of the dentate gyrus. This process is controlled by Wnt ...
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(Springer Verlag, 2017)© 2016, Springer-Verlag Berlin Heidelberg. This paper is a pioneering analysis of past climates in southern South America combining multiproxy reconstructions and the state-of-the-art CMIP5/PMIP3 paleoclimatic models to ...
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(Universiti Putra Malaysia, 2016)© 2008 IFRJ.The prevalence of metabolic syndrome, hypertension, heart disease and diabetes has been increasing rapidly in Chile in recent years. The rate of increase has paralleled the replacement of traditional Mediterranean ...
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(Archivos Latinoamericanos Nutricion, 2015)Cardiovascular diseases (CVD) are the main causes of morbidity and mortality in Latin America (LA). A high sodium intake is one of main risk factors for CVD. Strategies aiming to decrease sodium intake has been shown health ...
