Browsing by Title Facultad de Ciencias
Now showing items 6380-6399 of 8177
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(2002)This study evaluated the antioxidant defense system of the rat kidney following chronic exposure to red wine rich in flavonols. Both ethanol and antioxidant non-alcoholic wine components, mainly polyphenols, could contribute ...
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(Academic Press, 2001)Fast kinetic methods are used to measure reactions that take place in less time than required to mix the reagents manually and to measure the reaction by usual methods, like UV-visible spectrophotometry and fluorescence. ...
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(Taylor and Francis, 2020)Gomortega keuleis an endangered tree species, the single extant species of a monotypic family. It is safeguarded only in one protected area. Its recruitment and germination are low, possibly in part because rodents prey ...
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(1996)In this work we propose a kinetic model for the reaction between the neutral and anionic species in the first singlet electronic excited state of salicylamide in aqueous solution. The radiative rate constants (k01, k02) ...
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(Universidad de Chile., 1973)En el presente trabajo se estudian las reacciones entre algunos carbonilos metálicos (v.g.: carbonilos de fierro, molibdeno, tugsteno etc.) con el pseudohalogeno ditiocianogeno.
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(Universidad de Chile., 1979)En este trabajo se estudia 81 comportamiento como 1igant~s de las molecul~s P4S3X2 (X: CIt Sr. I). las cuales presentan una estructu ra que permite clasificarlas bajo un grupo puntual C2• ElIas poseen cuatro atomos da ...
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(Wiley-Hindawi, 2021)Endosymbiosis is a type of symbiosis where one species of microscopic scale inhabits the cell of another species of a larger scale, such that the exchange of metabolic byproducts produces mutual benefit. These benefits can ...
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(1982)An insect inhibitor isolated from maize extracts, 2,4-dihydroxy-7-methoxy-1,4-benzoxazin-3-one (DIMBOA), reacted with cysteine, mercaptoethanol, ethane. © 1982.
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(1989)DIMBOA (2,4-dihydroxy-7-methoxy-1,4-benzoxazin-3-one), a hydroxamic acid from cereals, reacted with primary amines to give an addition compound with two imino groups. Kinetic studies with DIMBOA and with the DIMBOA analogues ...
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(Springer-Verlag, 1983)Reactions of bis(diethylamino) and dimorpholinosulfane with [Cu(H2O)6](ClO4)2 in acetonitrile and with CuCl2·2H2O in ethanol yield Cu(I) compounds and SO2. The reaction product of dimorpholinosulfane and CuCl2 in ethanol ...
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(Elsevier, 2018)The transcription factor STAT3 has a crucial role in the development and maintenance of the nervous system. In this work, we treated astrocytes with oligomers of the amyloid beta peptide (A beta Os), which display potent ...
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(Elsevier, 1998)The hardness and softness quantities defined in density functional theory are discussed. A new scheme to calculate the hardness and softness hierarchies without resorting to the finite difference approximation is outlined. ...
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(American Chemical Society, 2013)We herein report on the usefulness of the reactivity indices profiles along a reaction coordinate. The model is tested to fully describe the reaction mechanism of the title reactions. Group nucleophilicity and electrophilicity ...
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(Elsevier, 2010)We herein report an experimental and theoretical study on the acetylation reaction of benzohydrazide derivatives towards p-nitrophenyl acetate (NPA). The kinetic data are consistent with a stepwise mechanism with the ...
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(PERGAMON-ELSEVIER SCIENCE LTD, 2004-07-26)The global and local electrophilicity indexes have been used to characterize the reactivity pattern of the C=C double bond towards nucleophilic addition reactions. A wide family of molecules including ketones, esters, ...
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(AMER CHEMICAL SOC, 2012)Photoisomerization of a protein bound chromophore is the basis of the light sensing and signaling responses of many photoreceptors. Z-to-E photoisomerization of the Pr Cph1 Delta 2 phytochrome has been investigated by ...
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(1994)Seven new diterpenoids, a labdane, three isopimarenes and three rearranged isopimarenes, have been isolated from the flowering tops of Satureja gilliesii. Their structures are based on their spectroscopic properties and, ...
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(American Chemical Society, 1986)Acid-catalyzed conversion of linalool into geraniol, nerol, and a-terpineol is slower than the corresponding reactions of geraniol and nerol, because the tertiary linalyl carbocation reverts to linalool rather than going ...
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(Magnolia Press, 2015)The hairy long-nosed armadillo, currently referred as Dasypus (Cryptophractus) pilosus, is an enigmatic species endemic to montane cloud forests and subparamo of Peruvian Andes. Its strikingly different external features, ...
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(ELSEVIER, 2006-07)This paper describes the main characteristics of the ion beam facility based on a 3.75 MeV Van de Graaff accelerator model KN3750 of HVE at the University of Chile. Recent setup improvements on three beam lines available, ...
