J. Braz. Chem. Soc. vol.14 número3

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

High resolution gas chromatography-olfactometry-mass spectrometry and aroma extract dilution analysis identified the most potent substances in its aroma as ethyl butanoate

In order to establish the best conditions for orange juice sample preparation by using the proposed on-line flow digestion system, the optimum sample and reagent loops volume,

Conformers of the radical esters in the furanose ring forms and the corresponding δ -lactones obtained from the cyclization of the least crowded conformer I .... formed