Antioxidant Activity and Constituents of Propolis Collected in Various Areas of Korea
2004; American Chemical Society; Volume: 52; Issue: 24 Linguagem: Inglês
10.1021/jf048726s
ISSN1520-5118
AutoresMok‐Ryeon Ahn, Shigenori Kumazawa, Tomoko Hamasaka, Keuk-Seung Bang, Tsutomu Nakayama,
Tópico(s)Healthcare and Venom Research
ResumoPropolis 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
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