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생약재 추출물로부터 분리한 α-Glucosidase 저해활성물질 탐색
최길용 ( Gil Yong Choi ),한갑조 ( Gab Jo Han ),하상철 ( Sang Chul Ha ) 한국식품저장유통학회(구 한국농산물저장유통학회) 2011 한국식품저장유통학회지 Vol.18 No.4
This is a part of the study on the food materials that are effective for diabetes treatment and for use in the development of functional bread products. In this study, various commercially available Oriental medicines with the intestinal absorption enzyme called α-glucosidase, which is known to be effective for diabetes treatment, were explored. According to the research results on the water and methanol in 200 kinds of Oriental medicines, which were separated by layer to investigate the inhibitory activity of α-glucosidase, Astragalus membranaceus (70.9%) in the water layer and Pericaeta communissima (72.9%) in the MeOH layer showed a strong inhibitory effect of over 70%. Myristica fragrans (69%), Morus alba (66.9%), Schisandra chinensis (65%), Panax notoginsens (63.9%), Anthriscus sylvestris (62.9%), Asparagus cochinchinensis (62.1%), Erycibe obtusifolia (60.9%), Polygonum cuspidatum (60.7%), Atractylodes lancea (60.2%), and Perilla frutescens (60.2%) in the water layer, and Codonopsis pilosula (67.8%), Prunus persica batsch (67.6%), Sinomenium acutum (63.5%), and Malvae semen (61.6%) in the MeOH layer, showed a more than 60% inhibitory effect. Thirty one species, including Polygonatum sibiricum (59.8%), Medicata fementata (59.7%), Alisma canaliculatum (59.5%), Coix lacryma-jobi (59.2%), Asiasarum sieboldi (59.0%), and Bupleurum falcatum (53.0%), in the water layer, and 10 species [Quisqualis indica (58.8%), Lycium chinense (58.3%), Trichosanthes kirilowii (58.0%), Thuja orientalis (55.9%), Bombyx mori (55.6%), Gallus domesticus (55.4%), Aralia continentalis (55.3%), Cibotium barometz (52.7%), Euphorbia pekinensis (52.7%), and Dolichos lablab (52.5%)] in the MeOHlayer, showed a more than 50% inhibitory effect. Therefore, such materials are expected to be the basic materials that will be used for the development of functional materials for diabetes treatment.
유효열(Yoo Hyo Yol),심은용(Shim Eun Yong),강재봉(Kang Jae Bong),고창순(Go Chang soon),최길용(Choi Gil Yong),김형복(Kim Hyoung Bok) 전력전자학회 2010 전력전자학술대회 논문집 Vol.2010 No.7
The Induction Heating equipment is widely used for steel plate heating in the surface treatment process of steel industries. In the case of thin steel plate, for high efficiency We need the high frequency induction heating equipment more than 100㎑. But it is difficult to realize the high frequency and high power at the same time. That's why most high frequency equipment more than 100㎑ has been imported from advanced Manufacturer. This paper will describe the development of 100㎑/5㎹A inverter module for 100㎑/20㎹A induction heating. We used the LCL resonance topology and ZVS/ZCS switching technology. And we also developed the low loss gate drive board and plate busbar inverter stack. We proved the performance by various experiment.
컴퓨터 모의실험을 이용한 Stop-and-wait ARQ 기법 성능 평가
이용학,이호준,최길용,장재신 인제대학교 2012 仁濟論叢 Vol.27 No.1
ARQ schemes are commonly used in various communication areas, for instance TCP protocol, to combat communication packet errors and there are three different types of ARQ protocol. In this paper, the performance of stop-and-wait ARQ scheme is evaluated with computer simulation and then compared with analytical results. Two different traffic generation modes are considered: the first one is the saturated traffic model and the other one is periodic arrival model based on exponential distribution. For performance measures, link utilization and average packet delay are used in this paper. According to numerical results, it is known that performance results from computer simulations coincide well with those by mathematical analysis. For the further study, we will continue to carry performance evaluations of two other ARQ schemes, go-back-N ARQ and selective repeat ARQ schemes.