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Type: Artigo de periódico
Title: Evalution of phenolic compounds in Brazilian propolis from different geographic regions
Author: Marcucci, MC
Ferreres, F
Custodio, AR
Ferreira, MMC
Bankova, VS
Garcia-Viguera, C
Bretz, WA
Abstract: Chemometrics has been shown quite efficient to uncover relationships between chemical composition of a sample and its geographical origin. Forty propolis samples originated from the the South and South East of Brazil were analyzed by HPLC and 18 compounds of interest were studied which included: caffeic, p-coumaric and ferulic acids, and some of their derivatives, pinobanksin, a derivative of kaempferol and five phenolic compounds (assigned as 3-prenyl-4-hydroxycinnamic acid (PHCA); 2,2-dimethyl-6-carboxyethnyl-2H-1-benzopyran (DCBE); 3,5-diprenyl-4-hydroxycinnamic acid (DHCA); compound E (still unknown) and 6-propenoic-2,2-dimethyl-8-prenyl-2H-1-benzopyran acid (DPB). Principal Component Analysis (PCA) indicated three different groups of propolis samples, having the same typical chromatogram evaluated by HPLC. Samples from the South East group were rich in derivatives of kaempferol. Samples from the South group I had a high content of DPB compound, but a low concentration of kaempferol derivatives and of DCBEN compound. Samples from the South group II were characterized by a high concentration of DCBEN, DHCA, p-coumaric and DPB compounds. Therefore, the identification of new compounds in Brazilian propolis can give useful information about the plant sources of a given geographic region.
Subject: propolis
high performance liquid chromatography
phenolic compounds
principal components
Country: Alemanha
Editor: Verlag Z Naturforsch
Citation: Zeitschrift Fur Naturforschung C-a Journal Of Biosciences. Verlag Z Naturforsch, v. 55, n. 41671, n. 76, n. 81, 2000.
Rights: fechado
Date Issue: 2000
Appears in Collections:Unicamp - Artigos e Outros Documentos

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