• Title/Summary/Keyword: Phenyl radical

Search Result 61, Processing Time 0.014 seconds

Screening of Effective Extraction Conditions for Increasing Antioxidant Activities of Licorice Extracts from Various Countries of Origin (원산지별 감초추출물의 항산화활성 증가를 위한 효율적인 추출조건 탐색)

  • Ha, Ji Hoon;Lee, Hye Mi;Kwon, Soon Sik;Kim, Hae Soo;Kim, Moon Jin;Jeon, So Ha;Jeong, Yoo Min;Hwang, Jun Pil;Park, Jong-Ho;Choi, Yung-Key;Park, Jino;Park, Soo Nam;Park, Dong-Sik
    • Journal of the Society of Cosmetic Scientists of Korea
    • /
    • v.39 no.4
    • /
    • pp.259-269
    • /
    • 2013
  • In this work, licorice extracts were prepared using various extraction conditions such as extraction solvent, temperature, and time from Glycyrrhiza uralensis (G. uralensis) produced in Korea and China and Glycyrrhiza glabra (G. glabra) in Uzbekistan. The optimum extraction condition was selected from the extraction yields and antioxidative activities of extracts. Korea licorice extracts showed the highest free radical (1,1-diphenyl-2-picrylhydrazyl, DPPH) scavenging activity (46.05%) under the extraction condition of 85% ethanol at $60^{\circ}C$ for 6 hours. The prominent ROS (reactive oxygen species) scavenging activity using luminol-dependent chemiluminescence assay and the cellular protective effect against $^1O_2$ induced cellular membrane damage were also shown from the extracts obtained from the same condition. Especially, Korea G. uralensis extracts exhibited the higher prominent protective effect (${\tau}_{50}$ = 116.4 min) than (+)-(+)-${\alpha}$-tocopherol (${\tau}_{50}$ = 28.5 min) and the extraction yield of Korea licorice extract was 18.75%, which is 1.2 times and 2.5 times higher than that of Uzbekistan and China, respectively. These results indicate that the extraction condition of 85% ethanol at $60^{\circ}C$ for 6 hours is optimal to prepare licorice extracts, which can be applicable as anti-oxidative cosmetic materials.