J. Braz. Chem. Soc. vol.14 número3

The method involves analyte conversion to SO 2 , gas diffusion through a Teflon ® semi- permeable membrane, collection into an alkaline stream (pH 8), reaction with Malachite

magnifica , Murraya paniculata , Citrus sinensis graft (Rutaceae), Lonchocarpus montanus (Leguminosae) were evaluated for their ability to inhibit the enzymatic activity of

Independent of coating composition, after correction of the Tafel curves for IR -drop, a single linear segment is obtained (see Figure 3) showing deviation from linearity of the

was collected in January 1990 at Serra da Moeda, Minas Gerais State, Brazil and identified by Professor José Badini of the Universidade Federal de Ouro Preto, Minas Gerais, where

All these results suggest that the ionic liquid act, at least using [Co(acac) 2 ] as catalyst precursor, as a simple immobilizing solvent and the reaction occurs preferentially in

Successive column chromatography over silica gel of the more polar fraction obtained by ethyl acetate elution from TFRH followed by rotational planar chromatography yielded.. 1 ,

The statistical comparison of hops of the Saaz variety (14 and 16) and Perle (15) which have strong aroma charac- teristics, with the other samples allowed the selection of

At the intermediate range of the titration curve, the simulated Cu(II) concentrations computed from Scatchard parameters presented an inflection that was not followed by