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관중속 3종의 메탄올 추출물 및 참지네고사리 분획물의 α-glucosidase 억제 활성
지래원(Lai Won Chi),이철희(Cheol Hee Lee) 인간식물환경학회 2015 인간식물환경학회지 Vol.18 No.2
This study was performed to analyze the α-glucosidase inhibitory activity in fronds of 3 Dryopteris species, D. crassirhizoma, D. nipponensis and D. fragrans var. remotiuscula, and in rhizomes of D. crassirhizoma and D. nipponensis, and then to explore the natural materials for developing natural α-glucosidase inhibitors. An analysis was performed using the crude extract of fronds and rhizomes obtained through 30 minutes ultra sonification extraction in 42 kHz ultrasonic water tank with 100% methanol, as a solvent, after the freeze drying and grinding. As a result of the analysis of α-glucosidase inhibitory activity, in respect of IC₅₀ values of fronds and rhizomes, D. nipponensis was the highest as 4.13 and 2.19μgㆍmL⁻¹ respectively among 3 Dryopteris species and their inhibitory activities were 342 and 646 times higher than acarbose(IC₅₀=1413.70μgㆍmL⁻¹) used as control group, respectively. In respect of the biomass required to inhibit 50% of α-glucosidase activity, the fronds and rhizomes of D. nipponensis required the least as 0.04 and 0.05mg, respectively. From the crude extract, D. nipponensis with high α-glucosidase activity and less required biomass was selected. And then the crude extract was subdivided by the solution in the order of n-hexane, chloroform, ethyl acetate, n-butanol and water in order to analyze α-glucosidase inhibitory activity as well as the biomass required for each fraction comparatively. The fronds of D. nipponensis was high in n-butanol fraction(1.09μgㆍmL⁻¹), and the rhizome was high in water fraction(9.36μgㆍmL⁻¹), indicating the inhibitory activity 1297 and 151 times higher than acarbose, respectively. The required biomass of the fronds and rhizomes of D. nipponensis were highest in n-butanol and water fraction. As a result of this study, the crude extract of D. nipponensis showed high α-glucosidase inhibitory activity requiring a small amount of biomass. Thus, its value for the development to antidiabetic agent is considered very high.
지래원 ( Lai Won Chi ),윤평섭 ( Pyung Sub Yoon ),김양희 ( Yang Hee Kim ) 한국화예디자인학회 2009 한국화예디자인학 연구 Vol.20 No.-
The criteria and regulations are examined by comparing the awarded works in recent years. The section of flower design competitions consist of practical works such as the production or installation of hand-tied bouquet, arrangement cut flower, bridal work, table decoration, planting, wall decoration, hanging decoration, flower jewel, object decoration, wreath, etc. Each section should be implemented according to requirements. ut of the foreign flower design competitions, it was discovered that the 2006 Competition in Koeln, Germany, applied the different weight of composition, colors, ideas, and technologies in screening for each of projects of bridal decoration, table decoration, cinerary urn decoration, and theme decoration. Another survey has showed that Overseas Flower Design Competition, 2005 World Skills Competition, Domestic Flower Design Competition, and 2007 42nd National Skills Competition allocated 40% in composition, 20% in colors, 30% in technology, and 10% in idea respectively for judgement. The 9th 2007 Korea Cup Flower Design Competition, among domestic flower design competitions. Technologies, skills, design forms and composition, colors, originality, and appropriateness respectively with 25% proportional weight.
지래원 ( Lai Won Chi ),김양희 ( Yang Hee Kim ) 한국화예디자인학회 2009 한국화예디자인학 연구 Vol.20 No.-
The aim of this study is to investigate the criteria of the Flower Design Competition and to evaluate the objectivity of judgment in order for applicants to reflect on their performance. Problems in judgment trends and the criteria will be analyzed to establish fair standards. The survey research into the analysis of regulations of a screening assessment in the flower design competition discovered that items to improve in the screening were the lobby 15.4%, the partiality 31.6%, the stereotype 28.2%, and the nepotism 24.8%. In case of judge selection for flower design competitions, twenty or more judge candidates should be selected from each professional areas for fair judgement. A preliminary committee should be organized with 20 or more candidates from flower design-related associations, flower design professors, and 10 candidates among nationally recognized expertises. This study has found that the judge committee consists of seven members including President selected by the lottery system and, if necessary, extra members. The judge committee consisted of male (32%) and female (68%) members, which is twice as many as their counterpart. It is believed that, social awareness and history considered, the role of female judges are more grave than male judges. Age distribution featured 3% in twenties, 21% in thirties, 24% in forties, 40% in fifties, and 12% in sixties or older group, which means that they are mostly in fifties. Career groups consisted of 34% in 2-5 years and 27% in 5-7 years. Only 4% of them had 10 year or longer career, which means that the history of flower design competitions is still short. The judgement should be made in both subjective and objective ways. A mixed judgement method is used in flower design competition: Judgement on composition, colors, and idea is independently made by each judges and judgement on technique made by the unanimous consensus of judges including President. The screening criteria should be accurately suggested and in order to exclude any subjective criterion, the review needs to secure fairness by introducing segmented review items.