Buscar
Mostrando ítems 31-40 de 102
Shedding light on the free radical nature of sulfonated melanins
(2020-11-19)
Melanin, an important class of natural pigment found in the human body, has stood out as a promising bioelectronic material due to its rather unique collection of electrical properties and biocompatibility. Among the ...
Mechanism of action of novel naphthofuranquinones on rat liver microsomal peroxidation
(Elsevier Ireland, 2009-12)
In order to elucidate the effect on mammal systems of new derivatives from 2-hydroxy-3-allyl-naphthoquinone, á-iodinated naphthofuranquinone (NPPN-3223), â-iodinated naphthofuranquinone (NPPN-3222) and â-methyl naphthofuranquinone ...
Electron spin resonance and electrochemical studies of oxidation products derivates of apomorphine in aprotic solvents.
(SOCIEDAD CHILENA DE QUIMICA, 2002-12)
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 ...
Mechanistic Implications of Zinc(II) Ions on the Degradation of Phenol by the Fenton Reaction
(SOC BRASILEIRA QUIMICASAO PAULO, 2013-08-02)
A study of the interference of Zn2+ ions on phenol degradation by Fenton reaction (Fe2+/Fe3(+) + H2O2) is reported. One of the first intermediates formed in the reaction, catechol, can reduce Fe3+ to Fe2+ and, in the ...
Mechanistic implications of zinc(II) ions on the degradation of phenol by the fenton reaction
(Sociedade Brasileira de Química, 2012)
A study of the interference of Zn2+ ions on phenol degradation by Fenton reaction (Fe2+/Fe3+ + H2O2) is reported. One of the first intermediates formed in the reaction, catechol, can reduce Fe3+ to Fe2+ and, in the presence ...
Electron Spin Resonance and electrochemical studies of oxidation products derivates of apomorphine in aprotic solvents
(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 ...
Antioxidant activity of gallates: an electrochemical study in aqueous media
(ELSEVIER SCI IRELAND, 1998-07-03)
The electron-donating ability of gallates, which are food and pharmaceutical antioxidants, is quantitatively assessed on the basis of their electrochemical characteristics. Gallic acid and the propyl, i-propyl, butyl, ...
Decolourization of anthraquinone reactive dye by electrochemical reduction on reticulated glassy carbon electrode
(2004-07-01)
The electrochemistry reduction for the removal of Reactive Blue 4 (RB4) dye from aqueous solution using reticulated glassy carbon electrode is investigated. At pH < 8.0 the anthraquinone group of the RB4 dye are reduced ...
The influence of seasonalness on the structural characteristics of aquatic humic substances extracted from Negro River (Amazon state) waters: Interactions with Hg(II)
(2007-09-06)
In this work, humic substances were extracted from water samples collected monthly from the Negro River basin in the Amazon state (Brazil) to study their properties in the Amazonian environment and interactions with the ...
The influence of seasonalness on the structural characteristics of aquatic humic substances extracted from Negro River (Amazon state) waters: Interactions with Hg(II)
(2007-09-06)
In this work, humic substances were extracted from water samples collected monthly from the Negro River basin in the Amazon state (Brazil) to study their properties in the Amazonian environment and interactions with the ...