In this work thirteen new compounds were synthesized and characterized using the two acids, phenylseleninic (1) and 4-bromophenylseleninic (2) as ligands precursors. Reactions were carried out using ammonium salts of ...

The species selected for this study were: Pluchea sagittalis, Baccharis pentodonta and Baccharidastrum triplinervium, all belonging to the Asteraceae family. The extracts and fractions from leaves and roots of three species ...

Rice is socially and economically important because it is the main component of the diet of more than half of the world s population. Brazil is one of the main rice producers in the world and Rio Grande do Sul state yields ...

The patients' health under treatment by Parenteral Nutrition (PN) is directly associated to the quality of the solutions used during the procedures and thus, a rigorous quality control is necessary. Among possible contaminants, ...

The exploitation of rice husks through thermal conversion at low temperature, adding economical value through its pyrolysis products, may represent a solution to the current environmental problem of discharging this ...

β-Blockers are an important group of prescription drugs; as a consequence of the large and continuous use, they are commonly found in the environment. This study assessed, preliminary, the inherent risk of the β-blockers ...

This work describes the synthesis of a number of polyaza heterocycles and the mechanistic study to obtain these products. Furthermore, the characterization was performed by spectroscopic method and the structural study by ...

This work describes firstly the synthesis of a new series of 3-acyl-4-aryl-2-(trifluoromethyl)-2-hydroxy-3,4,7,8-tetrahydro-2H-chromen-5(6H)-ones (4) (thirty-four examples) through the methodology of multicomponent reactions ...

In this work is proposed a procedure for separation in laboratory scale of extra-heavy crude oil emulsions with high dissolved water and salt content, using microwave radiation in a closed system. The emulsion was ...

In the first part of this work, a series of organochalcogen propargyl aryl ethers (19 examples) was easily prepared by reaction of propargyl aryl ethers and different organochalcogen electrophilic species. In general, the ...