Prognostic value of terminal ileal inflammation in patients with ulcerative colitis in remission

유종욱,현혜경,천재희 대한내과학회 2020 대한내과학회 추계학술대회 Vol.2020 No.1

S-670 Anaphylaxis to abalone: a case report

유종욱,손은숙,이상민,이상표 대한내과학회 2016 대한내과학회 추계학술대회 Vol.2016 No.1

Introduction: Abalone is a popular seafood in Asia, however anaphylaxis to abalone was rarely reported. We report a case of anaphylaxis after ingestion of abalone. Case presentation: A 24-year-old female visited an emergency department in Jeju island complaining of cough, dyspnea, rhinorrhea, generalized urticaria, facial edema and wheezing that had developed an hour after ingestion of abalone. She was discharged when her symptoms were subsided. One month later, she was referred to our outpatient clinic. We performed skin prick test, measurement of serum specific IgE antibody level, and SDS-PAGE with IgE immunoblotting. Both skin prick test and specific IgE antibody test were positive for abalone crude extract (Table 1 & Fig 1). In SDS-PAGE with IgE immunoblotting, we identified possible antigens sized 55 kDa, 100 kDa, and 25 kDa, respectively (Fig 2 & 3). Conclusions: This is the first case report of anaphylaxis induced by abalone in South Korea. This was documented by history taking, physical examination, and skin prick test. We also identified possible antigenic protein bands using SDS-PAGE and immunoblot tests.

중합시간과 중합방법에 따른 자가중합형 상교정용 레진의 중합률의 비교에 관한 연구

유종욱,장기택,김종철,Yoo, Jong-Wook,Jang, Ki-Taeg,Kim, Chong-Chul 대한소아치과학회 1999 大韓小兒齒科學會誌 Vol.26 No.2

가철성 상교정 장치에 많이 사용되는 자가중합형 상교정용 레진의 미반응 단량체는 레진의 물성과 생물학적인 면에 많은 영향을 끼친다. 따라서 미반응 단량체를 최소화하고 중합률을 최대로 하는 중합방법에 대한 연구는 중요한 의의를 갖는다. 저자는 자가중합형 상교정용 레진의 중합시간과 중합방법에 따른 중합률을 비교해보기 위해 시편을 다음과 같이 5군으로 나누어 연구를 진행하였다. 상교정용 레진의 분말과 용액을 혼합하여 제 1군은 $28^{\circ}C$의 공기중에 보관하였고, 제 2군은 $28^{\circ}C$의 물에, 제 3군은 $28^{\circ}C$의 물과 30psi의 압력에, 제 4군은 $43^{\circ}C$의 물에, 제 5군은 $43^{\circ}C$의 물과 30psi의 압력하에 각각 보관하였고, 10분, 1시간, 12시간, 1일, 3일 경과 후에 각 시편을 Fourier 변환적외선분광법을 이용하여 중합률을 측정하여 다음과 같은 결론을 얻었다. 1. 모든 군에서 중합시간이 경과함에 따라 중합률도 지속적으로 증가하는 양상을 보였다. 10분 경과 후의 결과와 비교하여 볼 때, 제 1군은 12시간 경과 후부터 중합률의 증가가 유의성이 있었고, 제 2군과 3군, 4군, 5군은 1시간 경과 후부터 유의성이 있었다(p<0.05). 2. 10분과 1일, 3일 경과 후에 제 5군, 제 4군, 제 3군, 제 2군, 제 1군의 순서대로 중합률이 높았다. 3. 중합시 온도에 따른 비교에서, 1일 경과 후를 제외하고는 모든 시간에서 $43^{\circ}C$에서 중합시킨 군의 중합률이 $28^{\circ}C$에서 중합시킨 군의 중합률 보다 유의성 있게 높았다(p<0.05). 4. 압력은 12시간 경과 후를(p<0.05) 제외하고는 중합률에 영향을 주지 못했다. 5. 보관방법은 1시간 경과 후를(p<0.05) 제외하고는 중합률에 영향을 주지 못했다. Autopolymerized resin facilitates a more rapid and easier means for the construction of removable orthodontic appliances than heat cured resin. But many reports reveal that more unreacted monomer is found in autopolymerized resin. It is very important to achieve maximum degree of polymerization because if polymerization is inadequate, high level of unreacted monomer has been shown to adversely affect mechanical and physical properties, and also the question of allergy or toxicity to methylmethacrylate must be considered. The purpose of this study was to compare the degree of polymerization according to curing method and curing time. Five groups were desinged ; Group 1 was polymerizied at room temperature($28^{\circ}C$) ; Group 2 in $28^{\circ}C$ water ; Group 3 in $28^{\circ}C$ water under 30psi pressure ; Group 4 in $43^{\circ}C$ water ; Group 5 in $43^{\circ}C$ water under 30psi pressure for 10 minutes, 1 hour 12 hours, 1 day and 3 days. The degree of polymerization was measured by means of Fourier Transform Infrared spectroscopy. The results were as follows: 1. The degree of polymerization increased constantly in accordance with curing time in all groups and after curing for 10 minutes, Group 1 showed significantly higher degree of polymerization after 12 hours and Group 2, Group 3, Group 4, Group 5 after 1 hour(p<0.05). 2. The degree of polymerization decreased in the order of Group 5, Group 4, Group 3, Group 2, Group 1 except when the curing time was 1 hour and 12 hours(p<0.05). 3. The degree of polymerization of Group 4, Group 5 cured at $43^{\circ}C$ showed significantly higher degree of polymerization than Group 2, Group 3 at $28^{\circ}C$ except when the curing time was 1 day(p<0.05). 4. Among Group 2, Group 3 and Group 4, Group 5, the pressure had no effect on polymerization except when the curing time was 12 hours(p<0.05). 5. Between Group 1 and Group 2, the method of storage had no effect on polymerization except when the curing time was 1 hour(p<0.05).

중합시간과 중합방법에 따른 자가중합형 상교정용 레진의 중합률의 비교에 관한 연구

장기택,김종철,유종욱 大韓小兒齒科學會 1999 大韓小兒齒科學會誌 Vol.26 No.2

가찰성 상교정 장치에 많이 사용되는 자가중합형 상교정용 레진의 미반응 단량체는 레진의 물성과 생물학적인 면에 많은 영향을 끼친다. 다라서 미반은 단량체를 최소화하고 중합률을 최대로 하는 중합방법에 대한 연구는 중요한 의의를 갖는다. 저자는 자가중합형 상교정용 레진의 중합시간과 중합방법에 따른 중합률을 비교해보기 위해 시편을 다음과 같이 5군으로 나누어 연구를 진행하였다. 상교정용 레진의 분말과 용액을 혼합하여 제 1군은 28℃의 공기중에 보관하였고, 제 2군은 28℃의 물에, 제 3군은 28℃의 물과 30psi의 압력에, 제 4군은 43℃의 물에, 제 5군은 43℃의 물과 30psi 의 압력하에 각각 보관하였고, 10분, 1시간, 12시간, 1일, 3일 경과 후에 각 시편을 Fourier 변환적외선분광법을 이용하여 중합률을 측정하여 다음과 같은 결론을 얻었다. 1. 모든 군에서 중합시간이 경과함에 따라 중합률도 지속적으로 증가하는 양상을 보였다. 10분경과 후의 결과와 비교하여 볼 때, 제 1군은 12시간 경과 후부터 중합률의 증가가 유의성이 있었고, 제 2군과 3군, 4군, 5군은 1시간 경과 후부터 유의성이 있었다.(p<0.05) 2. 10분과 1일, 3일 경과 후에는 제 5군, 제 4군, 제 3군, 제 2군, 제 1군의 순서대로 중합률이 높았다. 3. 중합시 온도에 따른 비교에서, 1일 경과 후를 제외하고는 모든 시간에서 43℃에서 중합시킨 군의 중합률이 28℃에서 중합시킨 군의 중합률보다 유의성 있게 높았다.(p<0.05) 4. 압력은 12시간 경과 후를(p<0.05) 제외하고는 중합률에 영향을 주지 못했다. 5. 보관방법은 1시간 경과 후를(p<0.05) 제외하고는 중합률에 영향을 주지 못했다. Autopolymerized resin facilitates a more rapid and easier means for the construction of removable orthodonic appliances than heat cured resin. But many reports reveal that more unreacted monomer is found in autopolymerized resin. It is very important to achieve maximum degree of polymerization because if polymerization is inadequate, high level of unreacted monomer has been shown to adversely affect mechanical and physical properties, and also the question of allergy or toxicity to methylmethacrylate must be considered. The purpose of this study was to compare the degree of polymerization according to curing method and curing time. Five groups were desinged ; Group 1 was polymerizied at room temperature(28℃) ; Group 2 in 28℃ water ; Group 3 in 28℃ water under 30psi pressure ; Group 4 in 43℃ water ; Group 5 in 43℃ water under 30psi pressure for 10 minutes. 1 hour, 12 hour, 1 day and 3 day. The degree of polymerization was meaured by means of Fourier Transform Infrared spectroscopy. The results were as follows : 1. The degree of polymerization increased constantly in accordance with curing time in all groups and after curing for 10 minutes. Group 1 showed significantly higher degree of polymerization after 12 hours and Group 2, Group 3, Group 4, Group 5 after 1 hour (p<0.05). 2. The degree of polymerization decreased in the order of Group 5, Group 4, Group 3, Group 2, Group 1 except when the curing time was 1 hour and 12 hours(p<0.05). 3. The degree of polymerization Group 4, Group 5 cured at 43℃ showed significantly higher degree of polymerization than Group 2, Group 3 at 28℃ except when the curting time was 1 day(p<0.05) 4. Among Group 2, Group 3 and Group 4, Group 5, the pressure had no effect on polymerization except when the curing time was 12 hours(p<0.05) 5. Between Group 1 and Group 2, the method of storage had no effect on polymerization except when the curing time was 1 hour(p<0.05)

지상용 3차원 레이저 스캐너의 측정 위치 정확도 향상을 위한 서보 제어기의 연구

유종욱(Yu, Jong Wook),정중연(Jeong, Joong Yeon),김태형(Kim, Tae Hyung) 한국측량학회 2009 한국측량학회지 Vol.27 No.2

LLC 공진형 컨버터를 적용한 전기자동차 고압배터리 충전기 개발

유종욱(J. W. Yoo),김경만(G. M. Kim),김태권(T. K. Kim),강찬호(C. H. Kang),전태원(T. W. Chun) 전력전자학회 2011 전력전자학술대회 논문집 Vol.2011 No.7

전기자동차의 고압배터리는 차종과 배터리의 종류에 따라 다양한 공칭전압을 가지며, 하나의 모델에 적용된 배터리도 사용에 따라 충전전압의 범위가 넓기 때문에 충전기의 출력전압이 광범위한 특성을 가져야 한다. 본 논문에서는 단상 110/220V 입력전원에 대하여 250V ~ 450V 범위의 직류전압의 특성을 만족시키기 위하여 LLC 공진형 컨버터를 적용하였으며, 제작된 시제품을 통하여 실차 배터리 충전시험을 실시하여 그 성능을 확인한다.

전복 섭취 후 발생한 아나필락시스 1예

유종욱 ( Jongwook Yu ),손은숙 ( Eun Suk Son ),김준환 ( Joonhwan Kim ),박홍석 ( Hong Suk Park ),이소정 ( Sojung Lee ),이상민 ( Sang Min Lee ),박정웅 ( Jeong-woong Park ),이상표 ( Sang Pyo Lee ) 대한천식알레르기학회(구 대한알레르기학회) 2016 Allergy Asthma & Respiratory Disease Vol.4 No.6

Abalone is popular seafood in Asia; however, allergy to abalone was rarely reported. We report a case of anaphylaxis after consumption of abalone. A 24-year-old female visited an Emergency Department, complaining of cough, dyspnea, rhinorrhea, generalized urticaria, facial edema, and wheezing that had developed 1 hour after consumption of abalone. She was discharged when her symptoms subsided after antihistamine and dexamethasone were given. One month later, she was referred to our outpatient clinic. We performed skin prick tests, measurement of serum specific IgE antibody level, and sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) with IgE immunoblotting. Both skin prick and specific IgE antibody tests were positive for abalone crude extract. In SDS-PAGE with IgE immunoblotting, we identified possible antigens sized 55, 100, and 25 kDa, respectively. This is the first case of abalone-induced anaphylaxis in Korea. (Allergy Asthma Respir Dis 2016:4:449-452)

Cleidocranial Dysplasia를 가진 환자의 증례보고

유종욱,김정욱,김종철 大韓小兒齒科學會 1998 大韓小兒齒科學會誌 Vol.25 No.1

Cleidocranial dysplasia(CCD). which is accepted as an autosomal disorder, is a generalized disorder of bone with severe dental abnormalities. Among the most characteristic anomalies seen are hypoplasia of clavecles or aplasia of calvicles, permanant non-ossification of cranial sutures & fontanels, delayed eruption of the permanant dentition & the presence of unerupted supernumerary teeth. CCD may first be noted by dentist because of many dental problems, so we should diagnose the disorder earlier & understand the development of dentition in CCD to ensure timely intervention with proper periodic dental X-ray.

단상 및 3상 제어 가능한 전기차용 대용량 충전기 설계

유종욱(Jonguk Yoo),홍봉국(Bongkuk Hong),김헌희(Heonhee Kim),도영수(Youngsu Dow),김범렬(Bumyul Kim),김종철(Jongcheol Kim) 한국자동차공학회 2018 한국자동차공학회 학술대회 및 전시회 Vol.2018 No.11

Cardiac Structural or Functional Changes Associated with CHA2DS2-VASc Scores in Nonvalvular Atrial Fibrillation: A Cross-Sectional Study Using Echocardiography

장영우,유종욱,박예민,신미승,정욱진,문정근 한국심초음파학회 2018 Journal of Cardiovascular Imaging (J Cardiovasc Im Vol.26 No.3

BACKGROUND: CHA2DS2-VASc is the most widely accepted scoring system for atrialfibrillation (AF) to assess stroke risk, although little has been revealed regarding theaccompanying cardiac functional/structural changes. This echocardiography study wasundertaken to understand the changes related to CHA2DS2-VASc scores. METHODS: A total of 4,795 nonvalvular AF patients were enrolled for the cohort, from which591 were excluded as they did not meet the inclusion criteria. Based on the CHA2DS2-VAScscores, the remaining 4,204 patients included in the study were divided into 4 groups: 0 to 1(n = 991); 2 to 3 (n = 1,642); 4 to 6 (n = 1,407); 7 to 9 (n = 164). RESULTS: Increase in the left ventricular mass index and prevalence of left ventricularhypertrophy (LVH) were observed with elevating CHA2DS2-VASc scores (p < 0.05 for all). Diastolic parameters such as left atrial volume index (LAVI) and the ratio of early diastolic mitralinflow velocity to early diastolic velocity of the mitral annulus (E/E′) also increased significantlyin the higher CHA2DS2-VASc score groups (p < 0.001 for all), although two-way ANOVA analysisshowed that such incremental diastolic impairment was independent of hypertension. LVH(hazard ratio [HR], 3.609; confidence interval [CI], 2.426–5.369; p < 0.001) and E/E′ (HR, 1.087;CI, 1.054–1.121; p < 0.001) were independent risk factors for CHA2DS2-VASc scores 2 or higher. CONCLUSIONS: Our findings suggest that increasing CHA2DS2-VASc scores are associatedwith impaired diastolic function that may represent high left atrial pressure favoringthrombogenic propensity.