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• W1999301504 abstract "Propolis is a resinous substance collected by honeybees from various plant sources. The composition of propolis depends on time, vegetation, and the area of collection. This study examined the antioxidant activity of propolis from various areas of Korea: Chilgok, Cheongju, Geochang, Muju, Pocheon, and Sangju. Ethanol extracts of propolis (EEP) were prepared and evaluated for their antioxidant activity by β-carotene bleaching, 1,1-diphenyl-2-picrylhydrazyl free radical scavenging, and 2,2‘-azinobis(3-ethylbenzothiazoline-6-sulfonic acid) radical cation decolorization assays. Furthermore, the major constituents in EEP were identified by high-performance liquid chromatography analysis with a photodiode array and mass spectrometric detection, and each component was quantitatively analyzed. EEP from Cheongju and Muju had relatively strong antioxidant activity accompanied by high total polyphenol contents. Propolis from Cheongju contained large amounts of antioxidative compounds, such as caffeic acid, kaempferol, and phenethyl caffeate. On the other hand, propolis from Pocheon had compounds not seen in propolis from other areas. Keywords: Antioxidant activity; propolis; free radical-scavenging activity; PDA; Korea" @default.
• W1999301504 created "2016-06-24" @default.
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• W1999301504 date "2004-11-02" @default.
• W1999301504 modified "2023-10-06" @default.
• W1999301504 title "Antioxidant Activity and Constituents of Propolis Collected in Various Areas of Korea" @default.
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• W1999301504 doi "https://doi.org/10.1021/jf048726s" @default.
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