Ricardo Stefani

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The Asteraceae, one of the largest families among angiosperms, is chemically characterised by the production of sesquiterpene lactones (SLs). A total of 1,111 SLs, which were extracted from 658 species, 161 genera, 63 subtribes and 15 tribes of Asteraceae, were represented and registered in two dimensions in the SISTEMATX, an in-house software system, and(More)
  • Rayzah Teodoro De Oliveira, Jair Marques Junior, Diego Vinicius Do Nascimento, Ricardo Stefani, Mato Grosso, Barra Do Garcas +1 other
  • 2014
A phytochemical screening of commercial samples of roasted coffee, soluble coffee and yerba maté prepared as tereré and chimarrão consumed in South America was evaluated. All samples were subjected to a qualitative assay for phytochemical screening in order to detect classes of phenolic compounds, as well as FT-IR analysis of the dried crude extracts,(More)
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  • Vicente De, Paulo Emerenciano, Marcus Tullius, Scotti, Ricardo Stefani, Sandra A V Alvarenga +8 others
  • 2006
Motivation. Kohonen Self–Organizing Feature Map (SOM Kohonen map) is a technique used for pattern classification. The method can be applied to classify different classes of organic compounds based on 13 C NMR chemical shift data. This can be a very useful tool in structure validation, which is one of the steps of automated structure elucidation process. In(More)
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