J. Braz. Chem. Soc. vol.27 número7

Response surface methodology was used to optimize the total phenolic content (TPC) result in white rice, using a new methodology that employed Fast Blue BB (FBBB) reagent, which

The contribution of irradiation and the dihydroxybenzenes (DHB), catechol (CAT) and hydroquinone (HQ), added or formed as phenol oxidation intermediates, was evaluated for the

Calculated free energy barriers and reaction free energies (kcal mol -1 ) obtained at 298 K for the second cycloaddition, in the gas phase and THF, using CPCM as solvent model..

Then, the reaction was extracted with ethyl acetate (4 × 100 mL), organic phase was dried over anhydrous MgSO 4 and the solvent was removed under reduced pressure.

Results for the analysis of solutions prepared by microwave-assisted nitric acid digestion of these samples were compared to those obtained by formic acid extraction so as

In this study, a series of diphenyl amines were synthesized and evaluated for in vitro antibacterial activity against Gram-positive ( Staphylococcus aureus , Bacillus subtilis ,

Derivatives of steviol, isosteviol and betulinic acid were prepared and tested in vitro against Plasmodium falciparum W2 (chloroquine-resistant) and Trypanosoma cruzi.. The

Group I (extracts of binary or ternary mixtures of acetone and dichloromethane) (Figure 5a) is located on the right of the dendrogram whereas Group II extracts of binary or ternary