Program of Pharmaceutical Science, Faculty of Pharmaceutical Science, UNICAMP, Campinas, SP.
Universidade São Francisco, Campinas, SP, Brazil.
Nat Prod Res. 2022 Mar;36(6):1626-1630. doi: 10.1080/14786419.2021.1892101. Epub 2021 Mar 10.
Stingless bees are responsible for pollinating up to 90% of Brazilian flora, so their study is of commercial and ecological importance. Stingless bees mix plant resins with wax and soil, forming geopropolis. Studies of the variability in composition and activity due to species, place and season of collection are lacking. Yield, total phenolic and flavonoid content, and antioxidant activity (via DPPH) of the extracts of fifteen () geopropolis samples collected over a year in the State of São Paulo, Brazil, as well as two samples from different regions of the state of Minas Gerais in Brazil were compared. Composition was determined by ultra-high-resolution liquid chromatography and mass spectrometry, identifying 16 compounds. The month and region of collection affected the available plant resins and influenced their yield, composition and antioxidant capacity. Depending on the place of collection, geopropolis is a promising natural source of antioxidant phenolic compounds.
无刺蜂对巴西植物群的授粉率高达 90%，因此它们的研究具有商业和生态意义。无刺蜂将植物树脂与蜡和土壤混合，形成地胶。目前缺乏关于由于物种、收集地点和季节的不同而导致的组成和活性变化的研究。本研究比较了巴西圣保罗州一年中采集的 15 个（）地胶样本和巴西米纳斯吉拉斯州两个不同地区样本的产率、总酚和类黄酮含量以及抗氧化活性（通过 DPPH 法）。通过超高效液相色谱和质谱法确定了组成，共鉴定出 16 种化合物。收集月份和地区影响可用植物树脂，并影响其产率、组成和抗氧化能力。根据收集地点的不同，地胶是一种有前途的天然抗氧化酚类化合物来源。
