Department of Food Science and Technology, Federal University of Santa Catarina, Florianópolis, SC, Brazil.
Department of Food Science and Technology, Federal University of Santa Catarina, Florianópolis, SC, Brazil.
Food Res Int. 2019 Dec;126:108683. doi: 10.1016/j.foodres.2019.108683. Epub 2019 Sep 14.
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.
蜂胶是一种由土壤组成的无刺蜂产品，其成分复杂，含有生物活性化合物，这些化合物的化学和生物性质取决于地理位置和蜜蜂种类。因此，本研究旨在通过自由基捕获能力和还原能力来评估蜂胶提取物的溶解度和化学稳定性。此外，还分析了游离和结合酚类化合物以及矿物质组成。对 Melipona mondury、Melipona quadrifasciata、Melipona scutellaris、Melipona seminigra 和 Tetragonisca angustula 的蜂胶样品进行了分析。在 30 天的储存时间内，还原化合物的最大值增加了 2.96% GAE，自由基清除能力的最大值增加了 5.84% AAE 和 8.58% TE。此外，与乙醇提取物相比，甲醇提取物释放的还原化合物至少多 51%，且具有至少 27%更高的自由基清除能力。多酚谱显示经过酸和碱水解后有 31 种化合物，如肉桂酸、阿魏酸、对香豆酸、橙皮素、香草醛。对于矿物质组成，在必需和非必需矿物质中发现了十六种矿物质，根据地理位置通过化学计量 PCA 和 HCA 分析对每个样品进行区分。蜂胶是天然化合物的潜在来源，可提高食品质量，增加生物活性成分，防止食品中的氧损伤，也可用于医疗保健的药理学应用。
