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한국산 인삼의 Polyphenol 분획물의 항산화, Phospholipase A2 및 암세포증식 억제효과
최희진 ( Choe Hui Jin ),한호석 ( Han Ho Seog ),박정혜 ( Park Jeong Hye ),손준호 ( Son Jun Ho ),배종호 ( Bae Jong Ho ),성태수 ( Seong Tae Su ),최청 ( Choe Cheong ) 한국응용생명화학회 2003 Applied Biological Chemistry (Appl Biol Chem) Vol.46 No.3
The polyphenol fractions of Korean ginseng were purified using Sephadex LH-20, MCI gel, Bondapak C_(18), TLC, and HPLC from the 60% acetone soluble fraction. Fraction I showed 48.16%, 79.71% and 43.55% inhibition at 150 ppm against lipid oxidation in the presence of copper ion, superoxide and hydrogen peroxidation. Electron donating abilities of fraction Ⅱ showed 35.17% inhibition at 200 ppm. Fraction Ⅲ showed 48.49% and 25% inhibition at 150 ppm against lipid oxidation in the presence of ferrous ion and hydroxy radical ion. The phospholipase A₂ inhibitory effect of fraction Ⅲ was 48.9% at the concentration of 60 ㎍/m/. The cytotoxic effects of fraction Ⅱ was the highest (73.29% at 0.25 ㎎/m/) among the tested polyphenol fractions.
유해성 조류 Microcystis aeruginosa의 생물학적 제어를 위한 미소생물제재의 적용 실험
김백호 ( Kim Baeg Ho ),최희진 ( Choe Hui Jin ),한명수 ( Han Myeong Su ) 한국하천호수학회 2004 생태와 환경 Vol.37 No.1
Growth inhibition of Microcystis aeruginosa was examined with single-or mixed treatment of algicidal bacterium Streptomyces neyagawensis and heterotrich ciliate Stentor roeseli, which isolated from natural freshwater. The harmful Cyanobacterium, Microcystis aeruginosa density was effectively suppressed by the algicidal bacterium Streptomyces neyagawensis, and the bacterial biomass was few chaged. The heterotrich cilitate S. roeseli isolated from the eutrophic Pal`tang riverine, Korea suppressed the algal biomass effectively. But mixed-treatment of both bio-agents was less effective, leading to an increase in algal density.
식품 : 반응표면분석을 이용한 들깨잎차 볶음처리의 최적화
한호석 ( Han Ho Seog ),박정혜 ( Park Jeong Hye ),최희진 ( Choe Hui Jin ),성태수 ( Seong Tae Su ),우희섭 ( U Hui Seob ),최청 ( Choe Cheong ) 한국응용생명화학회 2004 Applied Biological Chemistry (Appl Biol Chem) Vol.47 No.1
Response surface methodology (RSM) was applied in roasting processes of perilla leaves to develop a high quality perilla leaf tea. The Hunter color parameters and electron donating ability were monitored to optimize organoleptic properties of perilla leaf tea. The roasting processes were based on the central composite design with primary variables-roasting temperature (140~220℃), time (5~25 min), and reaction variables-sensory test, electron donating ability. From the variables, the roasting condition was optimized using statistical analysis system (SAS) program as developing the functional tea using perilla leaf. Hunter color L and b values of the powdered samples increased with the roasting processes, but Hunter color a value decreased. Electron donating ability was influenced by roasting temperature (p<0.01) and time (p<0.01), and optimum condition selected was at 220℃ for 15 min with coefficient of determinations (R²) above 0.98. After preference test of perilla leaf tea using parameter of taste, color, and flavor, we can estimate that the optimal roasting condition of preilla leaf for function tea manufacturing are 210~220℃ for 10~20 min by response surface methodology (RSM). Tyrosinase, xanthine oxidase and electron donating ability were 10.14, 14.37 and 59.19% of perilla leaf tea.