Browsing by Title Facultad de Ciencias
Now showing items 3798-3817 of 8178
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(ELSEVIER, 2008-08-29)Organochlorine pesticide endosulfan has been detected for the first time by using surface-enhanced Raman scattering (SERS) at trace concentrations. The bis-acridinium dication lucigenine was successfully used as a molecular ...
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(TAYLOR & FRANCIS, 2006)The functionalization of bentonite by intercalation of surfactants dodecylamine, hexadecylamine, octadecylamine, and the octadecyltrimethylammonium cation is described. Products are characterized by elemental analysis, ...
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(MDPI, 2021)Gold nanostars (AuNSs) exhibit modulated plasmon resonance and have a high SERS enhancement factor. However, their low colloidal stability limits their biomedical application as a nanomaterial. Cationic beta-cyclodextrin-based ...
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(Elsevier B.V., 2006-08-22)This work explores the functionalization of an organic–inorganic MoS2 lamellar compound, prepared by a chemical liquid deposition method (CLD), that has an interlamellar distance of 5.2 nm, using clusters of gold ...
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(Universidad de Chile., 1982)El Presente trabajo, tiene por objetivo: exponer en forma sencilla los elementos de lo que constituyen los procesos aleatorios generalizados; según el enfoque de los autores Gelfand – Vilenkin.
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(Elsevier, 2016)Darwin's naturalization hypothesis suggests that the success of an invasive species will be lower when colonizing communities are formed by phylogenetically related rather than unrelated species due to increased competition. ...
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(Elsevier Masson SAS, 2016)© 2015 Institut Pasteur.Darwin's naturalization hypothesis suggests that the success of an invasive species will be lower when colonizing communities are formed by phylogenetically related rather than unrelated species due ...
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(1991)Investigation of five further Chilean Senecio species afforded, in addition to known compounds, four new furoeremophilanes, four eremophilanes, a germacratrienol and an acylpyrrol derivative. Structures were elucidated by ...
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(1991)In addition to known compounds, a new furoeremophilane and two pairs of epimeric acetals with an eremophilane skeleton have been isolated from Senecio pachyphyllos. The structures were elucidated by high field 1H NMR ...
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(1992)The aerial parts of Gutierrezia resinosa gave 15 new diterpenes including 12 labdanes and three nerylgeraniol derivatives. The structures were elucidated by high field NMR spectroscopy. © 1992.
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(2007)The Fukui function, hardness, and other reactivity indices defined in the context of the Kohn-Sham scheme have been further examined following up previous developments. An equation analogue to the Berkowitz-Parr relationship ...
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(Royal Pharmaceutical Society, 2013-04-11)The chemical study of a dichloromethane extract from Azorella compacta was directed to the isolation of characteristic mulinane and azorellane diterpenoids in order to determine their gastroprotective activity. Methods ...
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(NLM (Medline), 2019)The chemical reactivity of the first- and second-generation Grubbs catalysts has always been a significant issue in olefin metathesis. In the present work, we study the [2+2] cycloreversion/cycloaddition and the alkylidene ...
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(Universidad de Chile, 2022)La plasticidad metabólica de las células cancerosas es el principal factor limitante de la eficacia de fármacos quimioterápicos, siendo uno de los mayores obstáculos en el tratamiento clínico. Las mitocondrias participan ...
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(1996)The avian nucleus rotundus, a nucleus that appears to be homologous to the inferior1 caudal pulvinar of mammals, is the major target of an ascending retino-tecto-thalamic pathway. Further clarification of the inputs to ...
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(2005)We evaluated experimentally the effect of a gall-maker insect on vegetative and reproductive traits of the shrub Colliguaja integerrima (Euphorbiaceae). We performed two experiments: (1) a chemical (insecticide) exclusion ...
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(1998)The gametogenesis of a 2-year-old coho salmon broodstock population cultured in a fish farm in southern Chile was studied. Gonadosomatic index (GSI), microscopic gonadal traits, and serum levels of estradiol-17b(E2), ...
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(AMER ASSOC IMMUNOLOGISTS, 2009-04-30)The acquired immune response begins with Ag presentation by dendritic cells (DCs) to naive T cells in a heterocellular cell-cell contact-dependent process. Although both DCs and T cells are known to express connexin43, a ...
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(BLACKWELL PUBLISHING, 2008-09)Aim A major question with regard to the ecology of temperate rain forests in south-central Chile is how pioneer and shade-tolerant tree species coexist in old-growth forests. We explored the correspondence between tree ...
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(Elsevier, 2020)A pilot study was initiated in 2018 under the Global Atmospheric Passive Sampling (GAPS) Network named GAPS-Megacities. This study included 20 megacities/major cities across the globe with the goal of better understanding ...
