Southern-Brazilian geopropolis: A potential source of polyphenolic compounds and assessment of mineral composition

Geopropolis is a stingless bee product compose mainly by soil, presenting complex composition geopropolis has bioactive compounds that will depend on geographical characteristics as well bee species, changing their chemical and biological properties. Thus the study aims to evaluate the solubility an...

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Veröffentlicht in:Food research international 2019-12, Vol.126, p.108683-108683, Article 108683
Hauptverfasser: Ferreira, Bruno Luís, Gonzaga, Luciano Valdemiro, Vitali, Luciano, Micke, Gustavo Amadeu, Maltez, Heloisa França, Ressureição, Carolina, Costa, Ana Carolina Oliveira, Fett, Roseane
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Sprache:eng
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Zusammenfassung:Geopropolis is a stingless bee product compose mainly by soil, presenting complex composition geopropolis has bioactive compounds that will depend on geographical characteristics as well bee species, changing their chemical and biological properties. Thus the study aims to evaluate the solubility and chemical stability of geopropolis extracts, through radical capture capacity and reducing capacity. Besides, analysis of free and bonded phenolic compounds, and mineral composition. Geopropolis samples of Melipona mondury, Melipona quadrifasciata, Melipona scutellaris, Melipona seminigra and Tetragonisca angustula were analyzed. Both reducing compounds with a maximum of 2.96% GAE and free radical scavenging potential with a maximum of 5.84% AAE and 8.58% TE increases over 30 days of storage time. Also, methanolic extracts released at least 51% more reducing compounds and exhibited at least 27% more free radical scavenging potential in comparison to ethanolic extracts. The polyphenolic profile shows 31 compounds after acid and alkaline hydrolysis as cinnamic acid, ferulic acid, p-coumaric acid, aromadendrin, vanillin. For the mineral composition, sixteen minerals were found among essential and non-essential, differentiating each sample by chemometric PCA and HCA analysis according to geographic region. Geopropolis is a potential source of natural compounds that could enhance food quality, increasing the bioactive content and preventing oxygen damages in foods, likewise for pharmacological application for healthcare. [Display omitted] •Geopropolis extracts are chemically stable over storage time of 30 days under 5 °C.•Each sample has an individual composition due to bee specie and vegetal resins.•Geopropolis samples has 31 phenolic compounds, some of them never cited until now.•The mineral composition of geopropolis is associated to geographical characteristics.•The elemental content of geopropolis reveal 16 essential and non-essential minerals.
ISSN:0963-9969
1873-7145
DOI:10.1016/j.foodres.2019.108683