Browsing by Title Artículos de revistas
Now showing items 979-998 of 2801
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(Electrochemical Soc Inc, 2020)The present studies reveal superoxide radical anion reactivity against synthesized coumarins. Free radicals play an important role in many diseases and they have a protective function also. Therefore, we must keep a balance ...
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(Springer, 2016)We report that glassy carbon electrodes (GCE) modified with multi-walled carbon nanotubes (MWCNTs) can be derivatized with 2,7-dinitro-9-fluorenone (2,7-NFN). The derivatization procedure involves simple immersion of the ...
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(2010)In this study the interaction between new benzimidazole molecules, 2-(2-nitrophenyl)-1H-benzimidazole (NB) and N-benzoyl-2-(2-nitrophenyl)-benzimidazole (BNB), with dsDNA and ssDNA was assessed at pH 7.4. Using differential ...
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(SPRINGER VERLAG, 1998-05)The activity of Pt-Ir deposits on titanium for the reduction of the nitrate ion in 0.5 M perchloric acid was studied. The electrodes were characterized by SEM-EDAX, XPS and cyclic voltammetry. The activity of the electrodes ...
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Electrogeneration of nitranion species from nitrofuryl substituted 1,4-dihydropyridine derivatives (ELSEVIER SCIENCE, 2005-01)We have synthesized and studied the electroreduction of 1,4-dihydropyridine derivatives with a nitrofuryl substituent at 4-position. The one-electron reduction of these compounds in non-aqueous medium generates the ...
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(1970)The effect of electrolytes upon aqueous solutions of nonionic detergents is studied by examining the distribution of the three components between the conjugate phases in the corresponding ternary diagrams. NaSCN and NaCl ...
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(1973)The unimolecular decarboxylation of 6-nitrobenzisoxazole-3-carboxylate ion is strongly catalyzed by micelles of cationic and nonionic surfactants. The catalysis by cationic micelles can be enhanced by adding some electrolytes ...
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(ELECTROCHEMICAL SOC, 2007)A study of the electrolytic oxidation of three new C-4 nitrofuryl 1,4-dihydropyridines in nonaqueous aprotic medium is presented. Controlled-potential electrolysis (CPE) in dimethylformamide +0.1 M tetrabutyl-ammonium ...
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(MARCEL DEKKER INC, 2002)Electron Spin Resonance spectra were obtained of the salicyliden-2-imino-5-nitropyrimidine (1(.-)), N,N-bis(5-nitro-salicyliden). ethylendiamine (2(.-)), 2-hydroxy-5-nitro-benziliden-5-iminoquinoline (3(.-)) anion I radicals ...
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(Sociedad Chilena de Quimica, 2002)Apomorphine acts as contractile muscular agent through an extra cellular calcium mechanism dependent. This activity is accompanied with autoxidacion process producing o-quinone derivates. o-Quinone is also obtained by ...
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(PERGAMON-ELSEVIER SCIENCE LTD, 2001-08)The ESR spectra of radicals obtained by electrolytic reduction of 4,4-dimethylanthracene- 1,9,10 (4H)-trione (1) and the regioisomeric quinones 8-acetyloxymethyl-4,4,5-trimethyl- (2), and 5-acetyloxy-methyl-4,4,8-trimeth ...
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(SOCIEDAD CHILENA DE QUIMICA, 2002-09)Acrylamide can be polymerized using new catalytic systems. These are based on rhenium complexes as photosensitizers with triethylamine (TEA). Electron Spin Resonance (ESR) was used for the detection of radicals species ...
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(2004)A series of dinuclear iron (III) complexes with carboxylate bridges, of the type [Fe2L2(H20)4](NO 3)2(H2O)m (m=1-3), where L=Schiff base derived from L-α-amino acids and salicylaldehyde have been prepared and characterised ...
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(American Chemical Society, 2019)The direct reaction of a series of substituted (1H-pyrazol-1-yl)pyridazine (L I : 6-(1H-pyrazolyl)pyridazine; L II : 3-chloro-6-(1H-pyrazole-1-yl)-pyridazine; L III : 6-(1H-3,5-dimethylpyrazolyl)pyridazine-3-carboxylic ...
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(PERGAMON-ELSEVIER SCIENCE LTD, 2006-06-19)Mixed valence dinuclear iron(II,III) complexes of the type [Fe2L2(H2O)(4)](NO3)(H2O)(3), where L is the dianion of a Schiff base ligand derived from alpha-amino acids (glycine and L-isolecine) and 5-bromosalicylaldehyde, ...
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(Sociedad Chilena de Química, 2014)For the first time, the study of the effect of length and degree of oxidation of multi-walled carbon nanotubes (CNTs) on the electroanalytical DNA sensing properties of modified glassy carbon electrodes (GCEs) is reported. ...
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(WILEY-V C H VERLAG GMBH, 2007-04)We report on the analytical performance of glassy carbon (GCE) electrodes modified with a dispersion of multiwall carbon nanotubes (CNT) in chitosan (CHIT) for the quantification of DNA. The electroanalytical response of ...
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(2011)This work reports the electrochemical response of the complex between dsDNA and PEI formed in solution and at the surface of glassy carbon electrodes (GCE) modified with a dispersion of multi-walled carbon nanotubes in ...
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(ELSEVIER SCIENCE SA, 2003-01-16)The electrooxidation of primary alcohols with four to eight carbon atoms on black Pt electrodeposits on gold/quartz, and on commercial bright platinum/quartz electrodes in perchloric acid solution, was studied by cyclic ...
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(Elsevier Ltd, 1997)Electrochemical studies on 4-(nitrophenyl) substituted 1,4-dihydropyridines of pharmacological importance have allowed us to generate the one-electron reduction product, the nitro radical anion, ArNȮ- 2 , in aprotic media. ...