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| Study on the Antioxidant and Antibacterial Activities of Different Extracts from Sunflower Disk Extract#br#
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| Zhang Bairong, Liu Hanxuan
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| (College of Biotechnology and Food Engineering, Jilin Institute of Chemical Technology, Jilin City,132022, China) |
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Abstract Using sunflower heads as raw material, this study investigated the total phenolic and total flavonoid contents in different solvent extracts of ethanol extracts, along with the antioxidant and antibacterial activities of each extract. Antioxidant activity was evaluated using DPPH and ABTS radical scavenging capacities and total reducing power as indicators, while the correlation between total phenolic and flavonoid contents and antioxidant activity was analyzed. The results showed that: Antibacterial activity was studied by measuring inhibition zone diameter, minimum inhibitory concentration (MIC), and minimum lethal concentration (MBC). The ethyl acetate extract exhibited the highest total phenolic and flavonoid contents at 9.04±0.92 mg/g and 4.30±0.021 mg/g, respectively. All solvent extracts demonstrated antioxidant and antibacterial activity, with the ethyl acetate extract exhibiting the strongest antioxidant and antibacterial effects. Total phenolic and flavonoid content in different sunflower head extracts showed extremely significant correlations (P<0.01) with DPPH and ABTS radical scavenging capacities and total reducing power. These findings provide a practical foundation for the development and utilization of sunflower heads.
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Published: 13 March 2026
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