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건칠(乾漆) 추출물(Nexia)의 Quality Control을 위한 기시법 및 안정성 연구
박상재,김경석,정현식,최원철,윤성우,Park, Sang-Jae,Kim, Kyung-Suk,Jung, Hyun-Sik,Choi, Won-Cheol,Yoon, Seong-Woo 대한암한의학회 2006 大韓癌韓醫學會誌 Vol.11 No.1
Rhus Verniciflua Stokes has been used for long history to treat blood stasis and cancer in Oriental Medicine. But urushiol, a constituent of Rhus Verniciflua Stokes has T-cell mediated allergic reaction, so it has made clinical limitation. Nexia is allergen removed extract of Rhus Verniciflua Stokes and its extraction process as well as quality control is needed to be standardized. The optimized extraction condition is as follow; temperature is $90{\sim}95^{\circ}C$, volume of slovent 10 times, extraction time >6 hours, pressure $<lkg/cm^2$, slovnet water or EtOH(60%), yield 8.1${\sim}$9.8(w/w). HPLC pattern and isolation study showed Nexia contain fisetin(>13.0%), fustin(>7.0%) and no urushiol.
고해상도 상용카메라를 사용하는 영상변환을 이용한 탄착점 좌표획득
박상재,하석운,Park, Sang-Jae,Ha, Seok-Wun 대한임베디드공학회 2011 대한임베디드공학회논문지 Vol.6 No.1
In the bomb impact test, to acquire the bomb impact point location the high-priced embedded equipments such as the Bomb Scoring System or the EOTS are needed. Recently, a high-resolution image processing could be possible since the resolution of the commercial camera is growing rapidly. In this paper we first propose an image transformation method for acquiring the real bomb impact image using a high-resolution commercial camera, and then present the process calculating the real bomb impact point location coordinate from the transformed image. Based on the experimental results we found the possibilities that the real bomb impact point information could be effectively earned just using the commercial camera.
20년간 수술받은 담석증 환자에 대한 역학적 및 임상적 분석
박상재 ( Park Sang Jae ),김선회 ( Kim Seon Hoe ),박윤찬 ( Park Yun Chan ),김용태 ( Kim Yong Tae ),윤용범 ( Yun Yong Beom ),박용현 ( Park Yong Hyeon ) 대한소화기학회 2003 대한소화기학회지 Vol.42 No.5
The aim of this study was to investigate the epidemiological characteristics and changing patterns of gallstone disease over the last 20 years. Methods: Four thousands and twenty gallstone patients who had received surgery at Seoul National University Hospital (1981~2000) were analyzed according to time of treatment; period I: 1981~1985 (831 cases), period II: 1986~1990 (888 cases), period III: 1991~1995 (1,040 cases) and period IV: 1996~2000 (1,261 cases). Data from 13 institutes in Korea reporting 13,101 gallstone cases were also reviewed with literature to elucidate the nation-wide trends. Results: The number of gallstone cases has gradually increased. A female-predominance was not observed (F/M=1.17-1.37). The CBD stone patients were older than the GB and the IHD stone patients. Over the study period, the relative portion of the GB stone group increased. The portion of CBD stone group decreased, while that of the IHD stone group was unchanged. The rural pattern of gallstone disease (low GB stone, high CBD and IHD stone) has become similar to the urban pattern. Such patterns are well agreed with the other literature reported in Korea. Conclusions: The pattern of gallstone disease in Korea has become similar to that in Western countries except a high prevalence of hepatolithiasis. (Korean J Gastroenterol 2003;42:415-422)