J. Braz. Chem. Soc. vol.18 número8

Herein, we communicate our results on the characterization and utilization of Bentonit Brasgel ™ , a commercial Brazilian clay, as an effective catalyst for the preparation of

in the aromatic ring, OH6, acts as an intermolecular H- bond donor to the carbonyl group C2=O3 and also as intramolecular H-bond acceptor from aromatic hydroxyl group OH5..

It can be observed that the substitution of Mn by Mo caused a significant increase in the onset oxidation temperature, which means a decrease in the catalytic activity of

The usefulness of the device is demonstrated by the retention of copper(II) ions adsorbed to the modified surface followed by amperometric detection at the gold microelectrode placed

Based on the importance of these food as mineral source and the necessity to characterize their mineral composition, the goal of this study was to access the distribution of Cu, Fe,

In addition, these flavonoids ( 1-4 ) and the methanol fraction FF were evaluated for cytotoxic activities against Ehrlich carcinoma cells and DNA topoisomerase I and II- α

The present investigation, which adds to the knowledge of this species, led to the isolation of alkaloids, sesquiterpenoids and other constituents from different extracts obtained

The analytical features (precision, limit of detection and accuracy) demonstrated the feasibility of the proposed procedure using microemulsions for the direct determination of