Browsing by Title Facultad de Ciencias
Now showing items 4602-4621 of 8168
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(1976)Functional micelles of hexadecyl(2-hydroxyethyl)dimethylammonium bromide (I) are better catalysts than hexadecyltrimethylammonium bromide (CTABr) for the alkaline hydrolysis of diethyl and di-n-hexyl p-nitrophenyl phosphate ...
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(1965)Apyrase from potato extracts has been purified 200-fold by two different procedures; both procedures furnish an apyrase which splits ATP faster than ADP. By using P32-labeled substrates, it was possible to demonstrate that ...
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(2003)The kinetic mechanism of rat liver hexokinase D (‘ glucokinase’) was studied under non-co-operative conditions with 2- deoxyglucose as substrate, chosen to avoid uncertainties derived from the co-operativity observed ...
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(1984)The number and nature of glucose-phosphorylating enzymes of rat intestinal mucosa were investigated by chromatographic, electrophoretic, and kinetic methods. Three fractions with glucose-phosphorylating activity were ...
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Kinetics and mechanism of the reaction of a nitroxide radical (tempol) with a phenolic antioxidant (2003)In the absence of redox-active transition metal ions, the removal of Tempol by Trolox occurs by a simple bimolecular reaction that, most probably, involves a hydrogen transfer from phenol to nitroxide. The specific rate ...
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(PERGAMON-ELSEVIER SCIENCE LTD, 2005-11)Copper was removed from an acidic mine drainage (AMD) using a liquid emulsion membrane contactor. The acidic drainage was a harmful natural acidic solution generated by bioleaching and chemical leaching of copper and iron ...
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(1992)The ordering behaviour in quenched αCu-Al was investigated by differential scanning calorimetry (DSC) under rising temperature conditions and by electron diffraction. It was found that the ordering processes can be better ...
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(Frontiers Media, 2016)Due to the developing of multi-resistant and invasive hypervirulent strains, Klebsiella pneumoniae has become one of the most urgent bacterial pathogen threats in the last years. Genomic comparison of a growing number of ...
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(Royal Society of Chemistry, 2020)Lyotropic liquid crystals (LLCs) are mixtures of amphiphile molecules usually studied as mimetic of biological membrane. The equilibrium dynamics of tetradecyltrimethyl ammonium cation (TTA(+)) molecules forming nematic ...
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(2007)En este artículo se presenta diversos ejemplos concretos y estudio de casos que aportan evidencia sobre la manera en que la cognición hecha cuerpo “florece” principalmente mediante metáforas, que involucran cambios ...
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(Sociedad de Neurología, Psiquiatría y Neurocirugía, 2010-03-03)El constante aumento en la expectativa de vida en la población mundial ha incrementado la preocupación hacia la búsqueda de la comprensión de la Enfermedad de Alzheimer (EA), así como de su diagnóstico temprano y tratamiento. ...
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(1990)The extract of the aerial parts of Gutierrezia espinosae gave 11 new and two known labdanes as well as five new nerylgeraniol derivatives. The structures were elucidated by high field 1H NMR spectroscopy. The chemotaxonomic ...
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(2002)A chemical study of aerial parts of Haplopappus illinitus afforded five labdane diterpenoids whose structures were elucidated by high field NMR spectroscopy and 2D techniques. Four of them are dicarboxylic acids previously ...
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(Natl Research Council of Canada, 1996)The marine gastropod mollusk *Trimusculus peruvianus collected on the coast of Central Chile yielded four new labdane metabolites. The structural elucidation of all compounds was accomplished by spectral analysis. One ...
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(2018-08)La industria chilena hortofrutícola enfrenta grandes desafíos en el área de inocuidad alimentaria y bioseguridad. Garantizar el cumplimiento de los más altos estándares internacionales, le permite a empresas exportadoras, ...
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(Blackwell Publishing Ltd, 1997)Aphid infestation triggered a significant induction of hydroxamic acids (Hx) in wild wheat Triticum uniaristatum seedlings in comparison to control seedlings. We hypothesized that indirect costs of Hx induction (expressed ...
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(Soc Int Odonatologica, 2017-06)Pantala flavescens is the most widespread odonate on Earth, absent only in Antarctica and parts of Europe. A recent study performed with sequences of mtDNA suggested the presence of one panmictic population of the species ...
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(Universidad de Chile, 1989)En esta tesis se estudio la autoecología de dos especies simpátricas de lagartijas (Liolaemus curis y L. hernani) de la zona central de Chile, con el objeto de conocer los presuntos mecanismos puestos en juego que permite ...
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(2007)We analyze the surface circulation of the coastal waters of the Humboldt Current system based on five Lagrangian satellite-tracked drifters (three launched on January 2005 and two on January 2006) deployed at 30{ring ...