• FLOWER RESEARCH JOURNAL
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• v.17 no.4
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• pp.271-278
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• 2009

The attempts to develop natural antioxidants have been made with aerial part of 16 Compositae species by analyzing their phenolic compound contents, scavenging activities on 1,l-diphenyl-2-picrylhydrazyl (DPPH) and 2,2'-azino-bis-(3-ethylbenzthiazoline-6-sulphonic acid) (ABTS) radicals, ferrous ion chelating effects and inhibition effects on peroxidation of linoleic acids. Total polyphenol and flavonoid contents were highest in Matricaria recutica. Scavenging activity on DPPH and ABTS radicals were highest with extracts of Echinacea angustifolia and Serratula coronata var. insularis f. insularis, respectively. Aerial palt extracts of all species showed lower DPPH scavenging activity than ascorbic acid and 2,6-Di-tert-butyl-4-methylphenol (BHT). But Serratula coronata var. insularis f. insularis demonstrated higher ABTS scavenging activity than ascorbic acid and BHT. In Hieracium pilosella, Echinacea angustifolia, Matricaria reculica extracts showed higher ABTS scavenging activity than BHT. Ferrous ion chelating effects was highest with Matricaria recutica extract, but the effects were much lower than ethylenediaminetetraacetic acid (EDTA). The inhibition activity in lipid peroxidation of linoleic acids was highest in Eupatorium japonicum with 90.06% inhibition 4 days after reaction and 40.52% after 24 days. This demonstrated higher inhibition activity and longer lasting than BHT. Aerial part of Matricaria recutica for extraction source, rather than flower, has higher potential for antiox.idant material. In conclusion, development of natural antioxidants in Compositae is possible by studying antioxidant activity of each species.

• Journal of the Korean Society of Food Science and Nutrition
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• v.39 no.2
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• pp.159-164
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• 2010

The present experiments were carried out to develop new antioxidants from EtOH extract of flower resources of Compositae plant concerning total polyphenol and flavonoid content, scavenging activities on DPPH and ABTS radicals, ferrous ion chelating effects, and inhibition activity on lipid peroxidation of linoleic acid. EtOH extracts from Matricaria recutica, Cosmos bipinnatus, Synurus deltoides, and Aster pilosus showed higher level of total polyphenol content, and the flavonoid content was the highest in C. bipinnatus. However, scavenging activity on DPPH radicals was the highest in EtOH extract of Hieracium pilosella-1.1 times higher than BHT control. The activity on ABTS radical scavenging was the highest in EtOH extracts of M. recutica and S. deltoides-2.0 and 1.2 times higher than ascorbic acid, and 2.2 and 1.3 times higher than BHT, respectively. Ferrous ion chelating effects was also the highest in M. recutica, but the level was much lower than EDTA. Inhibition activity on lipid peroxidation of linoleic acid, measured at every 4 days for 32 days, was superior and longer lasting with M. recutica and Achillea alpina, compared to that of BHT. In conclusion, antioxidant activity was different depending on species, so selection of proper plant species for the development of potential antioxidant is very important.