J. Braz. Chem. Soc. vol.13 número2

When the cellulose tris (3,5-dimethylphenylcarbamate) stationary phase was used under reversed phase conditions (CHIRALCEL OD-R), the chiral discrimination behavior also changed,

Diethyl ether (10ml) and water (25ml) were added, and the viscous organic layer separated. The white residue was insoluble in most organic solvents

The surface morphology of the samples, before and after use under extensive oxygen evolution (Tafel experiment), was characterized by Scanning Electron Microscopy and the

Despite all the investigations of steroids in the marine environment, the current analytical methodologies for steroids in marine sediments are laborious and time- consuming,

In order to obtain these aggregation pheromones, which present the 6,8-dioxabicyclo[3.2.1]octane structure, the synthetic strategies utilized in this work had as key steps the

The first peak of the g OuHu (r) plots, shown in Figure 4b, indicates that hydrogen bonds between urea molecules are centered at about 0.20 nm and the first peak of the g CuCu (r)

Ground-state diffuse reflectance proved to be by itself a good technique for the evaluation of total PAH content of urban particulate matter, since results directly correlate with

The observed small dependence of the tautomeric energy barriers on the nature of the substituents was rationalized by a mechanism of tautomerism, which involves a