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|Type:||Artigo de periódico|
|Title:||Comparison of the flavonoid aglycone contents of Apis mellifera propolis from various regions of Brazil|
|Abstract:||Forty-six specimens of propolis which were collected by Apis mellifera were obtained from various regions of Brazil and extracted with 80% aqueous ethanol (ethanolic extract of propolis, EEP). The extracts were analysed by using determination of total flavonoid concentrations using the aluminum nitrate method, UV-spectrophotometry, reversed phase-high performance thin layer chromatography (HPTLC), and reversed phase-HPLC. Six samples of EEP, which contained high total flavonoid concentrations, were selected for further investigation. HPTLC indicated that the quality of flavonoid aglycones of EEP from the States of Minas Gerais and Sao Paulo (Southeastern Brazil), Goias and Mate Grosso do Sul (closely to Southeastern) were similar, but were different compared to those of EEP's from Parana and Rio Grande do Sul, which are located in Southern Brazil. Reversed Phase-HPLC analysis of EEP's from Southern Brazil identified 7 flavonoid aglycones, whereas there were 9 from Sao Paulo and Minas Gerais and 7 from Goias and Mate Grosso do Sul. These results indicate that the plant ecology of Southeastern and Southern Brazil are different. It was also observed that all samples of EEP's demonstrated inhibition of growth of Staphylococcus aureus coagulase positive, whereas Escherichia coli was not inhibited.|
|Editor:||Inst Tecnologia Parana|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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