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Kyu-shik Jeong,정원일,Jae-yong Chung,Mi-young An,Chae-yong Jung,Gyoung-jae Lee,Jong-soo Kang,Byeong-cheol Kang,Young-heun Jee,Bruce H Williams,Young-oh Kwon,Da-hee Jeong 대한수의학회 2003 Journal of Veterinary Science Vol.4 No.2
Cirrhosis Occurring in a Young Woodchuck (Marmota monax) Due to Vertical Transmission of Woodchuck Hepatitis Virus (WHV)Da-hee Jeong, Won-il Jeong, Jae-yong Chung, Mi-young An, Chae-yong Jung, Gyoung-jae Lee1, Jong-soo Kang1, Byeong-cheol Kang2, Young-heun Jee3, Bruce H Williams4, Young-oh Kwon5 and Kyu-shik Jeong*College of Veterinary Medicine, Kyungpook National University, Daegu 702-701, Korea1Shinwon Scientific Co., LTD, Research Institute, Suwon, Korea2Clinical Research Institute, Seoul National University, Seoul 110-744, Korea3College of Veterinary Medicine, Jeju National University, Jeju 690-756, Korea
SMR 컨버터를 이용한 자연 회생형 소프트 스위칭에 관한 연구
권순걸,시거영,구헌회 경남대학교 공업기술연구소 2000 硏究論文集 Vol.18 No.-
전원 장치의 소형화와 전력 변환 효율의 증가를 위하여 고주파 스위칭 기술이 적용되고 있지만 이에 따른 스위칭 손실과 고주파 노이즈 증가의 문제가 발생한다. 이런 고주파 스위칭 손실은 스위칭 소자의 기생 커패시터에 의한 스위칭 턴-온 손실이 주요한 요인이다. 이러한 손실을 줄이기 위하여 소프트 스위칭 방법을 이용한다. 소프트 스위칭 회로는 주회로 전류를 공진시켜 공진파형을 이용하여 출력 파형을 형성하는 공진형과 스위칭 기간만 공진현상을 이용하고 다른 부분은 전압과 전류를 일정한 값에 클램프하는 부분 공진형이 있다. 이에 본 논문에서는 이러한 부분 공진형 회로에서 신뢰성을 향상시키고 회생에너지를 주 스위칭에 이용하여 회생하는 전압 입력형 소프트 스위칭 회로에 관하여 연구하였다. High frequency switching technique is suitable for making power conversion System. However, it causes switching loss and increasing high frequency noise. To improve this problem, resonant circuit is usually used. Especially, partial resonant circuit is well suited for high power demanding. This paper proposes SMR converter circuit, which consists of frequency conversion circuit, isolated transformer, and snubber circuit. Main circuit has center tap in transformer and use it as one line of AC input. Therefore, snubber voltage could be clamped constant voltage and this snubber circuit act as energy recovery. Thus, it has small loss and improves power efficiency.
Heun Young Kwon,Tae Un Kim 대한의생명과학회 2004 Biomedical Science Letters Vol.10 No.4
Maggot fibrolase (MsMg-1) was purified from the maggots of Mimela splendems using ammonium sulfate fractionation, DEAE Affi-gel affinity chromatography. This protease had a molecular weight of 85 kDa as determined by SDS-polyacrylamide gel electrophoresis under reducing conditions. It showed strong proteolytic and fibrinolytic activities. The purified enzyme was strongly inhibited by phenylmethanesulfonyl fluoride, Mn²?, and Zn²? but it was not by EDTA, EGT, Mg²?, Ca²?, and Li²? ions. In these experimental results, we have speculated that MsMg-1 is a serine protease with a strong fibrinolytic activity.
Kwon Heun Young,Kim Tae Un The Korean Society for Biomedical Laboratory Scien 2004 Journal of biomedical laboratory sciences Vol.10 No.4
Maggot fibrolase (MsMg-1) was purified from the maggots of Mimela splendems using ammonium sulfate fractionation, DEAE Affi-gel affinity chromatography. This protease had a molecular weight of 85 kDa as determined by SDS-polyacrylarnide gel electrophoresis under reducing conditions. It showed strong proteolytic and fibrinolytic activities. The purified enzyme was strongly inhibited by phenylmethanesulfonyl fluoride, Mn/sup 2+/, and Zn/sup 2+/ but it was not by EDTA, EGT, Mg/sup 2+/, Ca/sup 2+/, and Li/sup 2+/ ions. In these experimental results, we have speculated that MsMg-1 is a serine protease with a strong fibrinolytic activity.
Soo Kwon Park,이중로,이승식,손효진,Ji Young Yoo,문정찬,Heun Young Kwon,임채오,박정동,조무제,이상열 한국분자세포생물학회 2002 Molecules and cells Vol.13 No.3
Three soluble enzyme fractions (F-I, F-II, and F-III) that hydrolyze phophoinositides were separated from soybean sprouts by using Matrex green gel column chromatography. Among the three phosphatidylinositol (PI)-specific phopholipsase C (PLC) enzymes, only the third fraction (F-III) was able to hydrolyze phosphatidylinositol 4,5-bisphosphate (PIP2) as well as phosphatidylinositol (PI) and phosphatidylinositol phosphate (PIP) as substrates. The F-I and F-II fractions only showed enzymatic activities for PI and PIP. The PIP2-hydrolyzing PLC protein, F-III, was partially purified using the chromatographic steps of the Matrex green gel, phenyl Toyopearl, Matrex orange gel, Mono S cation exchange, and superose 6 gel filtration columns. The molecular weight of the F-III protein was estimated to be about 64 kDa on SDS-PAGE. The protein showed immunocross-reactivity with a polyclonal antibody that was prepared against the X and Y motifs of animal PLC enzymes, the conserved catalytic domains. Ca2+ ion critically affected the PIP2- hydrolyzing PLC activity of the F-III protein, representing maximal activity at 10 M Ca2+ concentration. The PIP2-hydrolyzing PLC activity of the protein was also significantly increased by sodium deoxycholate (SDC) from 0.05 to 0.08%. However, the activity was greatly reduced above the concentration, and no activity was detected at 0.3% SDC. In addition, the protein exhibited maximal PIP2-hydrolyzing PLC activity at pH, in the range of 6.5−7.5.
권영진(Young-Jin Kwon),이병흔(Byeong-Heun Lee),최윤주(Yun-Ju Choi),이영재(Young-Jae Lee) 한국화재소방학회 2022 한국화재소방학회 학술대회 논문집 Vol.2022 No.춘계
2017년 12월 21일 15시 53분 충청북도 제천시 하소동 9층짜리 스포츠센터 주차장에 있는 천장에서 화재가 발생했다. 제천소방서 소속 출동대가 16시에 도착했으나, 1층의 차량과 LP가스통의 폭발 위험성 때문에 접근하지 못하다가 16시 30분에 내부로 진입하였다. 이 사고로 29명이 사망하고, 40여명이 부상을 입은 대형화재사례였다. 15시 53분에 신고를 받은 제천소방서는 16시에 현장에 도착해 16시 5분에 대응 1단계를, 17시 20분에 대응 2단계를 발령해 소방인력을 동원하였다. 소방청은 17시 9분에 중앙사고수습본부와 중앙긴급구조통제단을 가동했으며, 제천시는 17시 40분에 지역재난대책본부를 설치해 재난에 대응하였다. 행정안전부 장관은 17시 42분에 상황판단을 위한 회의를 진행한 다음 19시 40분에 사고 현장에 도착했으며, 20시 30분에 범정부현장대책지원단이 가동되었다. 본 화재사건의 주요 논점으로서 초기 대응 문제와 건축물의 문제 및 비상전원의 상실의 문제점 등 다양한 문제점이 주요 이슈가 되었다, 특히 건축물의 문제점으로 건물이 필로티 구조로 건축되어 1층 주차장에 화재가 발생하면 주입구로 탈출할 수 없어 인명구조가 힘들었다는 지적이 있다. 건물의 외장재를 드라이비트 재질로 하여 화재가 외벽의 스티로폼을 타고 급속도로 번졌다는 주장도 제기되었다. 또한 소방시설관리업체에서 진행한 소방안전점검에서 자동화재탐지설비가 제대로 작동하지 않았다는 지적이 있으며 스프링클러의 알람밸브가 잠겨 스프링클러가 작동하지 않았다. 또한 정전에 이은 비상전원 공급이 되지 않았고, 여성 사우나의 출입문이 제대로 작동하지 않았으며, 비상구가 창고로 이용되는 등 대피가 용이하지 않았다. 또한 이 건물은 7층짜리로 되어 있는 것을, 9층으로 테라스를 불법으로 증축한 것은 물론, 옥상 기계실을 주거용도로 불법으로 사용한 문제도 있다. 또한 비상발전기 미 작동으로 인한 비상전원 상실의 문제점도 큰 이슈가 되었다. 본 내용은 이러한 주요논점을 백서로 정리하고 그 주요 문제점 등에 대한 개선방안을 정리한 것이다.
( Se Young Jang ),( Go Heun Kim ),( Soo Young Park ),( Chang Min Cho ),( Won Young Tak ),( Jeong Han Kim ),( Won Hyeok Choe ),( So Young Kwon ),( Jae Myeong Lee ),( Sang Gyune Kim ),( Dae Yong Kim ),( 대한간학회 2012 Clinical and Molecular Hepatology(대한간학회지) Vol.18 No.4
Background/Aims: This study evaluated the clinical outcomes of balloon-occluded retrograde transvenous obliteration (BRTO) for the treatment of hemorrhage from gastric varices (GV) in Korean patients with liver cirrhosis (LC). Methods: We retrospectively analyzed data from 183 LC patients who underwent BRTO for GV bleeding in 6 university-based hospitals between January 2001 and December 2010. Results: Of the 183 enrolled patients, 49 patients had Child-Pugh (CP) class A LC, 105 had CP class B, and 30 had CP class C at the time of BRTO. BRTO was successfully performed in 177 patients (96.7%). Procedure-related complications (e.g., pulmonary thromboembolism and renal infarction) occurred in eight patients (4.4%). Among 151 patients who underwent follow-up examinations of GV, 79 patients (52.3%) achieved eradication of GV, and 110 patients (72.8%) exhibited marked shrinkage of the treated GV to grade 0 or I. Meanwhile, new-appearance or aggravation of esophageal varices (EV) occurred in 54 out of 136 patients who underwent follow-up endoscopy (41.2%). During the 36.0±29.2 months (mean±SD) of follow-up, 39 patients rebled (hemorrhage from GV in 7, EV in 18, nonvariceal origin in 4, and unknown in 10 patients). The estimated 3-year rebleeding-free rate was 74.8%, and multivariate analysis showed that CP class C was associated with rebleeding (odds ratio, 2.404; 95% confidence-interval, 1.013-5.704; P=0.047). Conclusions: BRTO can be performed safely and effectively for the treatment of GV bleeding. However, aggravation of EV or bleeding from EV is not uncommon after BRTO; thus, periodic endoscopy to follow-up of EV with or without prophylactic treatment might be necessary in LC patients undergoing BRTO. (Clin Mol Hepatol 2012;18:368-374)
가임녀성(可姙女性)의 월경주기(月經周期)에 따르는 말초혈액상(末稍血液象) 및 L.A.P.의 변동(變動)
권헌영 ( Heun Young Kwon ),한석종 ( Suk Jong Han ) 대한임상검사과학회 1977 대한임상검사과학회지(KJCLS) Vol.9 No.1
Menstruation is the cycle uterine bleeding which occurs at regular intervals during the reproductive period in women``s life. During the active reproductive era menstruation occurs at approximately 28-30 day intervals. The clinical menifestation of menstruation in flow from the uterus, the mucosa of which being shed off. The uterus, however, has no endocrine function of its own, it function is entirely dependent upon physiologically active substances which are carried to the organ by the blood stream. These substances are hormones secreted by two endocrine organs, the ovary and the anterior lobe of the hypophysis, these hormones are the so called sex hormones. These variations in hematological parameters are in good agreement with present knowledge of the hormonal changes during menstrual cycle. In a series of 30 blood samples were tested for Hemoglobin, W.B.C., Lymphocyte, Platelet, L.A.P. and the results plotted against a hormal menstrual cycle.
Park, Soo-Kwon,Lee, Jung-Ro,Lee, Seung-Sik,Son, Hyo-Jin,Yoo, Ji-Young,Moon, Jeong-Chan,Kwon, Heun-Young,Lim, Chae-Oh,Bahk, Jeong-Dong,Cho, Moo-Je,Lee, Sang-Yeol Plant molecular biology and biotechnology research 2002 Plant molecular biology and biotechnology research Vol.2002 No.-
Three soluble enzyme fractions (F-Ⅰ, F-Ⅱand F-Ⅲ)that hydrolyze phophoinositides were separated from soybean sprouts by using Matrex green gel column chromatography. Among the three phosphatidylinositol (PI)-specific phopholipsase C (PLC) enzymes, only the third fraction (F-Ⅲ) was able to hydrolyze phosphatidylinositol 4,5-bisphosphate (PIP_(2)) as well as phosphatidylinositol (PI) and phosphatidylinositol phosphate(PIP) as substrates. The F-Ⅰand F-Ⅱ fraction only showed enzymatic activities for PI and PIP. The PIP_(2)-hydrolyzing PLC protein, F-Ⅲ, was partially purified using the chromatographic steps of the Matrex green gel, phenyl Toyopearl, Matrex orange gel, Mono S cation exchange, and superose 6 gel filtration columns. The molecular weight of the F-Ⅲ protein was estimated to be about 64 kDa on SDS-PAGE. The protein showed immunocross-reactivity with a polyclonal antibody that was prepared against the X and Y motifs of animal PLC enzymes, the conserved catalytic domains. Ca^(2+) ion critically affected the PIP_(2)-hydrolyzing PLC activity of F-Ⅲ protein, representing maximal activity at 10㎛ Ca^(2+) concentration. The PIP_(2)-hydrolyzing PLC activity of the protein was also significantly increased by sodium deoxycholate (SDC) from 0.05 to 0.08%. However, the activity was greatly reduced above the concentration, and no activity was detected at 0.3% SDC. In addition, the protein exhibited maximal PIP_(2)-hydrolyzing PLC activity at pH, in the range of 6.5-7.5.