期刊
FOOD RESEARCH INTERNATIONAL
卷 116, 期 -, 页码 312-319出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.foodres.2018.08.041
关键词
Phenolic profile/bioactivities; Thymus algeriensis; Ephedra alata; Infusion/decoction/hydroethanolic extract
资金
- Foundation for Science and Technology (FCT, Portugal)
- FEDER [UID/AGR/00690/2013, SFRH/BPD/101413/2014]
- Interreg Espana-Portugal [0377_Iberphenol_6_E]
Scientific research has been focused on finding natural occurring molecules from plant origin. Herein, infusion, decoction and hydroethanolic extracts of Thymus algeriensis Boiss. & Reut. and Ephedra data Decne. from Algeria were phytochemically characterized by LC-DAD-ESI-MSn, and evaluated regarding bioactive properties (antioxidant and antibacterial). Flavonol and flavone glycoside derivatives and phenolic acids, specially rosmarinic acid and kaempferol-O-glucuronide were the major compounds in T. algeriensis extracts. Otherwise, E. alata presented isoflavones and flavonol derivatives as main compounds, being hydroxypuerarin isomer 1 the major molecule. Aqueous extracts had significantly higher antioxidant activity, being this activity correlated with the amount of phenolic compounds. Antimicrobial activity of the extracts was tested against multi-resistant bacteria strains from clinical isolates. The obtained MIC values indicate that the hydroethanolic extracts revealed the highest effect, especially the one of T. algeriensis against Gram-positive bacteria. Hence, these plant extracts could be used in the development of bioactive ingredients.
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