Browsing by Title Facultad de Ciencias
Now showing items 4101-4120 of 8177
-
(BLACKWELL, 2008-01)Increasingly, biogeographical knowledge and analysis are playing a fundamental role in assessing the representativeness of biodiversity in protected areas, and in identifying critical areas for conservation. With almost ...
-
(Universidad de Chile, 2023)El glioblastoma es el tumor cerebral más agresivo, invasivo e indiferenciado entre los gliomas, designado grado IV por la OMS. Hasta la fecha, no se han desarrollado terapias efectivas para su erradicación, por lo que el ...
-
(Universidad de Chile, 2023)El glioblastoma es el tumor cerebral más agresivo, invasivo e indiferenciado entre los gliomas, designado grado IV por la OMS. Hasta la fecha, no se han desarrollado terapias efectivas para su erradicación, por lo que el ...
-
(MDPI AG, 2014)© 2014 by the authors; licensee MDPI.Peels and edible pulp from three species of citrus including Citrus aurantifolia (varieties pica and sutil) and Citrus x lemon var. Genova widely cultivated and consumed in Northern ...
-
HSAB analysis of charge transfer in the gas-phase acid-base equilibria of alkyl-substituted alcohols (American Chemical Society, 1999)A simple model to analyze charge redistribution associated with proton transfer (PT) reaction is derived from a classical ion transport model. The model is applied to the gas-phase acid-base equilibria of alkyl alcohols. ...
-
(Universidad de Chile, 2023)La población urbana hoy en día constituye la mayoría de la población mundial, por lo tanto, estudiar la composición de la contaminación y como las desigualdades socioeconómicas varían en estos entornos, resulta clave para ...
-
(Elsevier Ltd., 2007-05-22)Abstract—Four enantiomerically pure (S)-4-alkylthioamphetamine derivatives were evaluated as monoamine oxidase (MAO) inhibitors using the human and rat isoforms of the enzyme. Molecular dockings were performed in order ...
-
Human-Xenopus chimeras of Gsα reveal a new region important for its activation of adenylyl cyclase (1994)G proteins are heterotrimeric GTPases that play a key role in signal transduction. The α subunit of Gs bound to GTP is capable of activating adenylyl cyclase. The amino acid sequences derived from two X. laevis cDNA clones ...
-
(Universidad de Chile, 2023)El conocimiento de la dieta de los triatominos silvestres proporciona evidencia indirecta sobre las especies hospederas involucradas en la mantención del protozoo Trypanosoma cruzi, parásito que causa la enfermedad de ...
-
(ELSEVIER, 2008-03-11)A humic acid (HA) extracted from lignite was successfully used in surface-enhanced Raman scattering SERS experiments as molecular occlusion assembler deposited onto a Ag colloidal surface to detect the polycyclic aromatic ...
-
(1993)In the present study a copper mixed valence (MV) compound has been generated photochemically from the (CH3COO)2Cu(II)Cu(II)(OOCCH3)2 dimeric species in 95/5% (vol./vol.) methanol/acetic acid mixture as solvent. The MV ...
-
(2012)Flexible and transparent polymer complexes prepared by blending chitosan (CS) with about 1 M of oligo-mercaptopropilsiloxane were functionalized by incorporating silver or gold nanoparticles in a concentration range of ...
-
(TAYLOR & FRANCIS LTD, 2010)A series of new Chitosan=poly(mercaptopropysiloxane) hybrid films were obtained by blending mercaptopropylsiloxane oligomers (pMPS) with chitosan (CHI). The MPS oligomers were prepared by sol-gel using as precursor ...
-
(TAYLOR & FRANCIS, 2012)Hybrid two-dimensional nanocomposites of transition metal semiconductors based on molybdenum disulfide, zinc oxide, and vanadium pentoxide, in which ultra-thin sheets of the inorganic component are stabilized by insertion ...
-
(The Royal Society of Chemistry, 2016)A novel hybrid nanocomposite constituted of single TiO2 nanosheets sandwiched between stearic acid self-assembled monolayers was synthesized and tested in the photodegradation of methylene blue under sunlight. The product ...
-
(1991)On morphological, chemical composition and field distribution studies, the hybrid condition of Baccharis χ intermedia DC. is discussed. B. linearis (Ruiz et Pavón) Pers. and B. macraei Hook, et Arn. are the parental species. ...
-
(ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD, 2008-05)Hydraulic lift is defined as the passive movement of water through roots from wetter, deeper soil layers into drier shallower layers along a gradient in soil water potential. This process is generally found in plant species ...
-
(Nature Publishing Group, 2018)A harmful algal bloom (HAB) of the raphidophyta alga Pseudochattonella cf. verruculosa during the 2016 austral summer (February-March) killed nearly 12% of the Chilean salmon production, causing the worst mass mortality ...
-
(American Chemical Society, 2013)Preferential solvation in aromatic nucleophilic substitution reactions is discussed using a kinetic study complemented with quantum chemical calculations. The model system is the reaction of a series of secondary ...
-
(Springer New York LLC, 1998)© Springer-Verlag 1998. Recently, the proton affinity (PA) of ozone was experimentally determined by Cacace and Speranza [Science (1994) 265: 208] using a bracketing technique that involved the proton transfer (PT) reactions: ...