The Korean Journal of Community Living Science (한국지역사회생활과학회지)

The Korean Society of Community Living Science (한국지역사회생활과학회)
권호 표지

Effects of Harvesting Time, Aging Period and Extracting Temperature of Wild Green Tea (Camell sinesis) Leaves on Physiological Activity of Don Tea

찻잎의 수확시기, 돈차의 숙성기간 및 추출온도가 돈차의 생리활성에 미치는 영향

  • Park, Yong-Seo (Dept. of Horticulture, Mokpo National University) ;
  • Ryu, Hyeun-Hee (Institute of Regional Crop Research, Mokpo National University) ;
  • Lee, Mi-Kyung (Institute of Regional Crop Research, Mokpo National University) ;
  • Heo, Buk-Gu (Naju Foundation of Natural Dyeing Culture)
  • 박용서 (목포대학교 원예과학과) ;
  • 유현희 (목포대학교 지역특화작목산업화센터) ;
  • 이미경 (목포대학교 지역특화작목산업화센터) ;
  • 허북구 ((재)나주시천연염색문화재단)
  • Published : 2008.09.30
Download PDF
⟨ Previous Next ⟩

Abstract

This study was conducted to determine the potent physiological activity of traditional wild tea ("Don tea"; coin-shaped tea) as affected by different harvesting times, aging periods and extracting temperatures, No difference in anti-oxidative activities in the harvesting time and extracting temperature of tea leaves was observed. However, short aging periods of Don tea showed high ABTS {2-2-azonobis (3-ethylbenzothiazolin-6-sulphonic acid)} activity, ranging from 71.52 to 79.96%. DPPH (${\alpha},\;{\alpha}-diphenyl-{\beta}-picryl-hydrazyl$) radical scavenging activity of Don tea was 71.10 to 91.40%. Especially, longer aging period and an extracting temperature of $100^{\circ}C$ showed higher DPPH radical scavenging activity. With longer aging periods and an extraction at $90^{\circ}C$, nitrite radical scavenging activity of Don tea ranged from 74.04 to 94.92%. On the other hand, angiotensin 1-converting enzyme (ACE) inhibition activity of Don tea was 59.77-81.97%. It showed higher activity when harvested in June and August, aged for longer periods, and extracted at $100^{\circ}C$. These results suggested Korean traditional Don tea exhibited the highest physiological activity when aged over 8 months.

Keywords