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A systematic procedure to enhance reproducibility of SWASV cycles in the determ...
Silva, Nelson A. F.; Leitão, Ruben A. E.; Matos, Manuel J.This work presents for the first time a systematic study on the optimization of the electrochemical cleaning time of a mercury film when it is used as a working electrode material in the analysis of toxic metals, such as Pb2+, used as model metal, in real samples by SWASV. The optimization study for the film’s cleaning time aimed at attaining a Pb2+ minimum value in the film after the re-oxidation step of the p...
Simultaneous monitoring of toxic metals on white poplar (populus) by SWASV
Silva,Nelson A. F.; Lopes,Maria I.; Leitão,Ruben A. E.; Silva,Hugo F. A.; Matos,Manuel J.Square wave anodic stripping voltammetry (SWASV) was applied to the simultaneous determination of trace amounts of toxic metals Pb(II), Cd(II) and Cu(II) in white poplar (populus) leaves, used as bio indicator and gathered in a chosen area of the city of Lisbon with very high traffic intensity. The leaves were dried and subsequently exposed to an acid digestion microwave process. Square wave parameters were opt...
Lipid composition and dynamics of cell membranes of Bacillus stearothermophilus...
Rosa, Sónia M. L. J.; Antunes-Madeira, Maria do Carmo; Matos, Manuel J.; Jurado, Amália S.; Madeira, Vítor M. C.Bacillus stearothermophilus, a useful model to evaluate membrane interactions of lipophilic drugs, adapts to the presence of amiodarone in the growth medium. Drug concentrations in the range of 1-2 [mu]M depress growth and 3 [mu]M completely suppresses growth. Adaptation to the presence of amiodarone is reflected in lipid composition changes either in the phospholipid classes or in the acyl chain moieties. Sign...
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