ABSTRACT

Monofloral Ulmo honey is a very appreciated product in the international market but more information is needed in order to support their health properties. Total phenolic and flavonoid contents, antioxidant capacity and antibacterial activity of monofloral Ulmo (Eucryphia cordifolia) honey samples were determined. The samples contained between 176 and 208 mg gallic acid eq (GAE)/100 g for total phenolic content (TPC) and 43–90 mg Quercetin eq/100 g for total flavonoid content (TFC). The antioxidant activity ranged between 91 and 152 mM eq Trolox/g and 28–49 mM eq Trolox/g for DPPH and ABTS assays, respectively. All phenolic extracts from honey samples inhibited Staphylococcus aureus, Streptococcus pyogenes, Pseudomonas aeruginosa and Escherichia coli by plate assays. The chromatographic profile showed that Ulmo honey contained the polyphenolic gallic, caffeic, and coumaric acids, the flavonoids pinocembrin, chrysin, quercetin, luteolin and apigenin, and abscisic acid.

摘要

单花Ulmo蜂蜜是国际市场上非常受赞赏的产品，但需要更多信息以支持其健康特性。测定了单花Ulmo（Eucryphia cordifolia）蜂蜜样品中的总酚和类黄酮含量，抗氧化能力和抗菌活性。样品中总酚含量（TPC）为176至208 mg没食子酸当量（GAE）/ 100 g，总黄酮含量（TFC）为43-90 mg槲皮素当量/ 100 g。对于DPPH和ABTS分析，抗氧化剂活性分别在91至152 mM eq Trolox / g和28-49 mM eq Trolox / g之间。蜂蜜样品中的所有酚类提取物均能抑制金黄色葡萄球菌，化脓性链球菌，铜绿假单胞菌a和大肠杆菌通过板分析。色谱图表明，Ulmo蜂蜜中含有多酚没食子酸，咖啡酸和香豆酸，黄酮类pinocembrin，菊花，槲皮素，木犀草素和芹菜素以及脱落酸。