Buscar
Mostrando ítems 1-10 de 26
Evaluation of the electrochemical behavior of carbon paste electrode (CPE) with chalcopyrite (CuFeS2) in the presence of ferrous ions
(Trans Tech Publications Ltd, 2013-01-01)
In this work we present an electrochemical study using carbon paste electrode (CPE) with CuFeS2 in solutions with different concentrations of Fe2+ ions in order to evaluate the possible interaction between these ions and ...
Study of the influence of the rare earth elements (Ce3+ and Ce4+) concentration on the siloxanes coating applied on the copper surface
(2012-12-01)
This work studied the influence of the rare earth (Ce3+ and Ce4+) elements concentration in polysiloxane flints deposited on copper by dip-coating process, and evaluated their resistance in a 3.5 wt.% NaCl medium. Classical ...
A techno-economic analysis for MCFC cogeneration system
(2003-12-01)
In this paper, a methodology for the study of a fuel cell cogeneration system and applied to a university campus is developed. The cogeneration system consists of a molten carbonate fuel cell associated to an absorption ...
Um estudo sobre a corrosão aquosa de ligas de alumínio 7xxx submetidas a diferentes tratamentos térmicos
(2002-12-01)
This job aim has been to study the aqueous corrosion of the 7xxx heattreatable aluminium alloys, used in the aeronautical industry. The 7010, 7050 and 7475 alloys, have been supplied in the T7 condition and submitted to ...
Efeito do nitrato e nitrito na corrosão das ligas de alumínio 2024 e 7050 em soluções de NaCl
(2002-12-01)
The 2024-T3 and 7050-T7 aluminium alloys electrochemical behavior has been studied in NaCl 5% neutral solutions and 0,1M concentration containing NO 3 - or NO 2 -. The current job supports corrosion research on aluminium ...
Formation of silver chloride nanocrystals as a corrosion product of silver in H2SO4 solution
(2012-12-01)
The purpose of this study is to characterize the corrosion product on the surface of silver, employing H2SO4 (0.5M) as electrolyte. The electrochemical parameters, Ecor, Icor, V cor and Rp were obtained after analyzing the ...
Electrochemical determination of antimalarial drug amodiaquine in maternal milk using a hemin-based electrode
(2012-12-01)
Voltammetric analysis of amodiaquine using a hemin biosensor revealed a well-defined peak at 0.14 V (vs. Ag/AgCl), corresponding to the oxidation of amodiaquine at pH 7.0. The electrodic behavior indicated that the oxidation ...
Contribuição e retrospecto do projeto de extensão universitária Laboratório Móvel de Química
(Universidade Estadual Paulista (Unesp), 2015-09-23)
With the difficulties faced in Education in Brazil, especially in disadvantaged regions, as in the Vale do Ribeira, students and Unesp Campus Experimental of Registro Professor of Chemistry, Patricia S. Santiago, they ...
Electrocatalytic and voltammetric determination of sulfhydryl compounds through iron nitroprusside modified graphite paste electrode
(2003-10-02)
Iron nitroprusside Fe(II)NP was incorporated into a carbon paste electrode and the electrochemical studies were performed with cyclic voltammetry. The cyclic voltammogram of Fe(II)NP exhibits two redox couple with formal ...