Browsing by Title Facultad de Ciencias Químicas y Farmacéuticas
Now showing items 3795-3814 of 4842
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(2012)This article presents the most recent research in analytical chemistry concerning the development of rapid methodologies covering the period from 2009 up until today. In this context, different useful analytical methods ...
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(Springer New York LLC, 2019)Antioxidant compounds have the ability to trap free radicals; in honey, this capacity is related to the botanical origin of the sample, and therefore, there has been a growing interest in verifying the floral origin of ...
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(1988)The kinetics of the quenching of excited pyrene by several molecules in a variety of hydrocarbon solvents and in a diol are reported. The rate constants for reaction of the excited pyrene are, for the most part, ...
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(MDPI AG, 2018)© 2018 by the authors. Licensee MDPI, Basel, Switzerland. This study describes the in-silico rational design, synthesis and evaluation of cross-linked polyvinyl alcohol hydrogels containing γ-cyclodextrin (γ-CDHSAs) as ...
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Rational development of a novel hydrogel as a pH-sensitive controlled release system for nifedipine (MDPI AG, 2018)© 2018 by the authors. This work depicts the rational development (in-silico design, synthesis, characterization and in-vitro evaluation) of polyvinyl alcohol hydrogels (PVAH) cross-linked with maleic acid (MA) and linked ...
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(1996)The azomethin ylide of the 2-p-methoxyphenyl-4-phenyl-2-oxazolin-5-one underwent 1,3-dipolar cycloaddition to both tautomers of the 1-nitroso-2-naphthol. The reaction yields two naphthoxazoles: 2-phenylnaphtho[1,2-d]oxazole, ...
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(Universidad de Chile, 2023)Antecedentes: La farmacovigilancia (FV) es una actividad indispensable para conseguir terapias farmacológicas seguras y efectivas. Esta disciplina incluye el análisis de las notificaciones de reacciones adversas a medicamentos ...
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(Sociedad Chilena de Química, 1989)Se estudió la reacción de condensación de di-2-piridilmatano con los compuestos carbonílicos: benzaldehido, 2, piridilcarboxaldehido, acetona y di-2-piridilcetona, catalizada por sales de los metales de la primera serie ...
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(Sociedad Chilena de Química, 1996)El azometin-ilido de la 2-p-metoxifenil-4-fenil-2-oxazolin-5-ona reacciona por ciclo adición 1,3-dipolar con ambos tautómeros del 1-nitroso-2-naftol. La reacción forma dos naftoxazoles: 2-fenilnafto[1,2-d]oxazol,2-p-met ...
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(KeAi Publishing Communications Ltd., 2019)Typically, a Lewis acid and a Lewis base can react with each other and form a classical Lewis adduct. The neutralization reaction can however be prevented by ligating the acid and base with bulky substituents and the ...
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(HeteroCorporation, 2000)Several new 6-amino- and 6,8-diamino-4-aryl-2,3-dihydropyrimido[4,5- b][1,4]diazepines were obtained from the reaction of 4,5,6-triaminopyrimidine 1a and 2,4,5,6-tetraaminopyrimidine 1b with one equivalent of 3- ...
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(HETERO CORPORATION, 2000-03)Several new 6-amino- and 6,8-dinmino-4-aryl-2,3-dihydropyrimido[4,5-b][1,4]diazepines were obtained from the reaction of 4,5,6-triaminopyrimidine 1a and 2,4,5,6-tetraaminopyrimidine 1b with one equivalent of 3-dimethylam ...
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(HeteroCorporation, 1999)New 4-Aryl-6-methyl-8-phenyl-2,3-dihydropyrazolo[3,4-b]diazepines and 4- aryl-8-methyl-6-phenyl-2,3-dihydropyrazolo[4,3-b]diazepines were obtained from the reaction of 4,5-diamino-3-methyl-1-phenylpyrazole 1 with one ...
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(HETERO CORPORATION, 1999-05)New 4-Aryl-6-methyl-8-phenyl-2,3-dihydropyrazolo[3,4-b]diazepines and 4-aryl-8-methyl-6-phenyl-2,3-dihydropyrazolo[4,3-b]diazepines were obtained from the reaction of 4,5-diamino-3-methyl-1-phenylpyrazole 1 with one ...
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(SPRINGER/PLENUM PUBLISHERS, 2005-10)Purpose. The aims of the study are to analyze the interaction between 5-aminosalicylic acid (5-ASA) and peroxyl radicals and to evaluate the effect of some endogenous compounds such as ascorbic acid and amino acids on the ...
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(ELSEVIER SCIENCE, 2005-10-31)Detection of O-2((1)Delta(g)) emission, lambda(max) = 1270 nm, following laser excitation and steady-state methods were employed to measure the total reaction rate constant, k(T), and the reactive reaction rate constant, ...
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(2005)Detection of O2(1Δg) emission, λmax = 1270 nm, following laser excitation and steady-state methods were employed to measure the total reaction rate constant, kT, and the reactive reaction rate constant, kR, for the reaction ...
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(1978)Kinetic studies of the [Co(phen)3] (ClO4)3 2H2O nitromethane pyridine reaction were made spectrophotometrically, by recording the appearance of a new absorption band at 474 nm. The reaction is first order with respect to ...
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(ACADEMIC PRESS INC ELSEVIER SCIENCE, 2006-12-01)Cells have developed compensatory mechanisms to restore cell volume, and the ability to resist osmotic swelling or shrinkage parallels their resistance to necrosis or apoptosis. There are several mechanisms by which cells ...
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(Universidad de Chile, 2020)En este trabajo se midió la reactividad de los flavonoides quercetina, morina, 3–hidroxiflavona, luteolina y catequina frente a O2(1Δg), en presencia de los iones metálicos Ca+2, Cu+2, Zn+2 y Fe+2, en medio homogéneo y ...