Browsing by Title Facultad de Ciencias Químicas y Farmacéuticas
Now showing items 4015-4034 of 4849
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(ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD, 2004-01)We reported earlier that the production of 0 antigen lipopolysaccharide (LPS) by Salmonella enterica serovar Typhi (Salmonella typhi) increases at the onset of stationary phase and correlates with a growth-regulated ...
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(2001)Ruthenium (II) complexes of the type RuL(CO)(2)Cl-2, [RuL(CO)(2)L-2'](2+) and [RuL(CO)(2)Cl L'](+) [L=bipyridine (bpy), phenanthroline (phen), biquinoline (biq) and L'=pyridine (py), 4-chloropyridine (Cl-py), 4-methoxypyridine ...
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(1995)The catalytic activity of Ru3(CO)9 L3 (L = arylphosphine) in the WGSR and in the reduction of nitro derivatives to amines is studied. The same complex is supported in polystyrene‐divinylbenzene copolymer (PSDVB) and the ...
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(2012)The synthesis and characterization of ruthenium complexes containing polypyridine ligands: Ru(dppz)(PPh3)(2)Cl-2. Ru(bpy)(PPh3)(2)Cl-2, Ru(phen)(PPh3)(2)Cl-2. Ru(dppz-Cl)(PPh3)(2)Cl-2, Ru(phen)(CO)(2)Cl-2, Ru(bpy)(CO)(2)Cl-2 ...
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(Wiley-Blackwell, 2018)The reaction of 2-aminonicotinaldehyde with 2- or 4-methoxyacetophenone in basic media leads to the new ligands 2-(4-methoxyphenyl)-1,8-naphthyridine and 2-(2-methoxyphenyl)-1,8-naphthyridine, respectively, in high yield. ...
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(1996)Boldine (5,6,6a,7-tetrahydro- 1,10-dimethoxy-6-methyl- 4H-dibenzo[de,g]quinoline-2,9-diol) is an aporphine alkaloid noted for its antioxidant properties. A salient feature of the molecule is the non-planarity of ...
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(2000)The reaction of CpFe(dppe)I (Cp, cyclopentadienyl; dppe, Ph2P(CH2)(2)PPh2) with biologically active RSH molecules (L-cysteine hydrochloride, dithiothereitol and 2-mercaptoethanol) in the presence of NH4PF6 and in methanol ...
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(Microbiology Society, 1997)By using MudJ (Kan, lac)-directed operon fusion technology, mutants of Salmonella typhi whose gene expression is induced under anaerobic growth conditions were isolated. Characterization of their phenotypes and regulatory ...
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(Universidad de Chile, 2013-01)Recientemente, se demostró que la metabolización de etanol a acetaldehído es indispensable para que su consumo sea reforzante; sin embargo, no se conoce el mecanismo cerebral por el cual se produce este efecto. Se ha ...
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(Universidad de Chile, 2010)El quillay, Quillaja saponaria Mol., Quillajaceae, es un árbol de la zona central de Chile usado desde tiempos precolombinos como detergente. Sus saponinas crudas se utilizan como agentes espumantes y emulsificantes; y ...
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(Elsevier, 2020)The sarco/endoplasmic reticulum is an extensive, dynamic and heterogeneous membranous network that fulfills multiple homeostatic functions. Among them, it compartmentalizes, stores and releases calcium within the intracellular ...
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(ELSEVIER SCIENCE SA, 2005-04-01)A scanning electrochemical microscope (SECM), in the tip generation substrate collection and feedback modes, was used in a method to characterize the electrode mechanism of the O-2/O-2*(-) couple in dimethylsulphoxide ...
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(Elsevier, 2018-05-01)In this article, we review the application of fluorescence correlation spectroscopy (FCS) methods to studies on live cells. We begin with a brief overview of the theory underlying FCS, highlighting the type of information ...
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(1998)Purpose. To determine the formation of the one-electron reduction product from nisoldipine and its reactivity with relevant thiols in mixed medium. Methods. Cyclic voltammetry (CV) and electron paramagnetic resonance (EPR) ...
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(ELSEVIER SCIENCE BV, 2003-04-25)In the present work the efficiency of water under subcritical conditions for the extraction of pesticides having a broad spectrum of polarities from soils was evaluated. The pesticides under study were carbofuran, ...
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Screening fitoquímico, antimicrobiano y antioxidante de plantas pre-andinas y del altiplano chileno (Universidad de ChileCyberDocs, 2009)El altiplano o puna por sus características ambientales, es una región natural única en América del Sur, abarca el centro y sur del Perú, el norte de Chile, parte de Bolivia, y el noreste de Argentina. En el altiplano ...
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(SOC BRASILEIRA QUIMICA, 2007)A rapid and simple method was developed for screening polychlorinated biphenyls in transformer oil. The method is based on liquid-liquid extraction in methanol and subsequent direct gas chromatography-mass spectrometric ...
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(2012)The potential of microwave-assisted liquid-liquid and solid phase extraction coupled with fluorescence spectroscopy and employing one- to three-way spectral data was assessed in terms of their capacity for the rapid detection ...
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(Elsevier Science Publ. B.V., 1991)A simple, rapid and accurate direct method has been developed for the determination of bromazepam in pharmaceutical formulations using second-derivative absorption spectrophotometry. Methanol was used as the solvent for ...
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(Universidad de Chile, 2021)El consumo no controlado de opioides se ha convertido en un grave problema de salud pública en el mundo, debido a la dependencia física que estos generan. Las tasas de adicción, recaída al consumo y muertes por sobredosis ...