Evaluation of Antioxidant and Antimicrobial Activities of Ethanol Extracts of Three Kinds of Strawberries
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The antioxidant and antimicrobial activities of three kinds of strawberry ethanol extracts from L. f. (RCL), L. var. parvifolius (RPL), and Miq. (DCM) were investigated. The RPL was highest (<0.05) in phenolic, flavonoid, and anthocyanin contents. 2,2-Diphenyl-1-picrylhydrazyl and 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid) radical scavenging activities of RPL and DCM extracts were higher than that of RCL (<0.05). Hydrogen peroxide scavenging activity of RPL was high compared to DCM and RCL (<0.05). RCL exhibited a significant (<0.05) potent antioxidant activity in nitric oxide radical inhibition. Inhibition diameter zone (nearest mm) of extracts against the test bacteria ranged from 11.5 in RCL to 12.5 in DCM against , from 10.5 in RCL to 13.5 in DCM against , from 8.5 in DCM to 10.5 in RCL against , and the same inhibition of 10 mm in three of the extracts against . However, there was no inhibition against fungi and . Three of the extracts had the same minimum inhibitory concentration values of 12.50, 12.50, and 6.25 μg/mL against , , and , respectively. On the other hand, MIC values of 12.50, 12.50, and 6.50 μg/mL were recorded for RPL, DCM, and RCL against , respectively. The result of present study revealed that extracts from three kinds of strawberries could be potential candidates as antioxidant and antimicrobial sources for functional food industries.
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