J. Braz. Chem. Soc. vol.25 número5

Based on the UV absorption spectra, chemiluminescent spectra and the results of the free radical trapping experiment performed in this study, possible reaction mechanisms for the

The niobium pentachloride activity as a catalyst was investigated in Diels-Alder reactions between furan ( 1 ) and several reactive dienophiles – methyl acrylate ( 2a ),

3,5 As part of our studies on ketene dithioacetal for the synthesis of heterocycles, we have found that microwave irradiation accelerates the vinylic substitution of

29-32 At high percentages of water (> 70%) we verified the disappearance of the Q III band, the increase of aggregate band at 380 nm, and the appearance of another band at

In this work, a micro-flow-batch analyzer (µFBA) using webcam for spectrophotometric determination of ortho -phosphate and aluminium(III) in tap water is proposed.. PO 4 3–

Flavonoid Glycosides from Hosta longipes , Their Inhibition on NO Production, and Nerve Growth Factor Inductive Effects.. Chung Sub Kim, a Oh Wook Kwon, b Sun Yeou Kim c,d and

In this paper, we present a simple and low-cost capillary electrophoresis method for ultra- fast determination of active ingredients present in three different

This adsorptive character of the molecule was used to develop a novel, fully validated, rapid, selective and simple differential pulse cathodic adsorptive stripping