Nutritional Composition and Antioxidative Activity of Different Parts of Taraxacum coreanum according to Drying Methods

Abstract

This study compared the nutritional composition and antioxidative activity of different parts of Taraxacum coreanum (aerial parts and roots) according to different drying methods (natural drying and freeze-drying). There were no significant differences in vitamin C content in roots depending on the drying methods. However, vitamin A (P＜0.01), E (P＜0.001) and C (P＜0.001) content of aerial parts, and vitamin A (P＜0.001) and E (P＜0.05) content of roots were significantly higher after freeze-drying compared to natural drying. For organic acids, the oxalic acid content of the aerial parts and roots were the highest. The total polyphenol and total flavonoid content in extracts from the aerial parts (P＜0.01) and roots (P＜0.05) were significantly higher after freeze-drying compared to natural drying. In addition, the total polyphenol and flavonoid content, DPPH radical scavenging activity, and antioxidative index from the natural drying and freeze-drying of Taraxacum coreanum extracts were significantly higher in the aerial parts compared to the roots (P＜0.05). These results suggest that the nutritional composition and antioxidative activity of Taraxacum coreanum are higher in the aerial parts compared to the roots, and higher after freeze-drying compared to natural drying. Therefore, the aerial parts of Taraxacum coreanum could be suggested as an antioxidative functional food source.

An investigation of antioxidative and anti-inflammatory effects of Taraxacum coreanum (white dandelion) in lactating Holstein dairy cows

“…Furthermore, aerial parts of T. coreanum can be harvested approximately 5 times a year when the roots are left in the ground because the aerial parts regrow from the remaining roots. Moreover, the total polyphenol and flavonoid contents and antioxidative activity of T. coreanum extracts are higher in the aerial parts than in the roots [ 19 ]. In addition, the naturally dried form has a lower production cost than the extract form and can act as a coarse fiber for dairy cows.…”

The anti-inflammatory effect of Taraxacum coreanum on lipopolysaccharide induced inflammatory response on RAW 264.7 cells

“…서양의 학에서는 항산화, 항균, 담즙 분비 촉진, 항류마티스 및 이뇨 등에 사용할 수 있는 약재로 여러 질병에 오래전부터 널리 사 용되었다 [9][10][11][12][13][14] . 특히 흰민들레는 최근 연구에서 위암의 억제, 항산화 효과, 항균활성 등의 효능이 밝혀졌다 [15][16][17] . 흰민들레의 대표적인 생리 활성 성분들에는 n-hexane, trichloromethane, ethyl acetate, n-butanol 등이 있다고 알려져있다 [15][16][17] .…”

“…특히 흰민들레는 최근 연구에서 위암의 억제, 항산화 효과, 항균활성 등의 효능이 밝혀졌다 [15][16][17] . 흰민들레의 대표적인 생리 활성 성분들에는 n-hexane, trichloromethane, ethyl acetate, n-butanol 등이 있다고 알려져있다 [15][16][17] . (Fig.…”