M.Sc. in Food Chemistry and Nutrition, Greece
*Corresponding Author: Patramanis Nikolaos, M.Sc. in Food Chemistry and Nutrition, Greece.
Received: December 28, 2022; Published: January 06, 2023
Objective: The aim of this study was to determine the effect of the extraction method on the yield of phenolics and flavonoids, as well as the profile of the main antioxidant components found in hybrid cultures of Sideritis scardica and Sideritis syriaca. In addition, the antioxidant and antimicrobial capacity of Sideritis syriaca extracts was studied.
Methodology: The methods used for the extraction of phenolic and flavonoid components were the following: wetting of the solid sample, ultrasonic assisted extraction, USAE (Ultrasonic Assisted Extraction) and microwave assisted extraction, MAE (Microwave Assisted Extraction). Also, bioactive components of the extracts were identified by liquid chromatography LC UVDAD/ESI-MS method. The presence of phenolic components was determined by the FolinCiocalteu method. Finally, DPPH and FRAP tests were performed to quantify the antioxidant capacity of the extracts, as well as tests against bacterial strains (S.aureus, E.feacalis, E.coli) to check their antimicrobial capacity.
Result: The most effective extraction method of the phenolic and flavonoid components of Sideritis scardica and Sideritis syriaca extracts, was the ultrasonic assisted method (USAE). Some of the bioactive compounds identified in the extracts were chlorogenic acid, phenyltannoic glycosides as well as flavonoid glycosides. Antioxidant and antimicrobial activities were found, which are related to the phenolic concentration of the extracts.
Conclusion: From the findings of the study, mountain tea can be considered a potential functional beverage and a valuable source of bioactive ingredients in a wide range of products.
Keywords: Mountain Tea (Sideritis); Phenolics; Antioxidant; Bioactive
Citation: Patramanis Nikolaos. “Bioactive Compounds and Evaluation of Antioxidant and Antimicrobial Activity of Mountain Tea Extracts (Sideritis)". Acta Scientific Nutritional Health 7.2 (2023): 26-30.
Copyright: © 2023 Patramanis Nikolaos. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.