J. Braz. Chem. Soc. vol.24 número4

more operative intra-molecular ligand-to-metal energy transfer is observed in compounds presenting ligand donor states above the lanthanide acceptor energy levels,.. minimizing

The new clerodane diterpene methyl 3-oxo-12-epibarbascoate was isolated from the stem barks of Croton urucurana together with the known diterpene methyl 12-epibarbascoate.. The

Relative desorption ion yield curves as a function of the electron energy for selected ions in PT film using an extraction potential of +1200 V... intensely produced in the

The prepared sensing platform was characterized by transmission electron microscopy (TEM), cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS).

An efficient and sensitive method for simultaneous determination of the insecticide fipronil and its main metabolites fipronil desulfinyl, fipronil sulfide and fipronil sulfone

liquid-liquid extraction (HLLE) methods, solvents of higher density than water (i.e., chlorinated solvents) have been used, and there is no report to use low density miniaturized

Pattern recognition of the GC×GC-FID chromatograms was performed by parallel factor analysis (PARAFAC) and it was successfully applied for the differentiation of these

Effect of bias potential on the difference between phototocurrents of the Ti/TiO 2 electrode in the absence and the presence of 0.15 mmol L -1 hydrazine in phosphate buffer