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Perilesional Steatosis in Ectopic Pancreas Mimicking Exogastric Mass : A Case Report
남미연,김미영,김여주,서창해,최석진,조재성 대한자기공명의과학회 2013 Investigative Magnetic Resonance Imaging Vol.17 No.2
We report an unusual case of ectopic pancreas that appeared on radiologic images as a lobulated, submucosal mass enclosed by fat component in the gastric lower body. Although, ectopic pancreas including fat component is extremely rare, in the setting of gastric submucosal mass with containing perilesional fat, these findings should be considered in ectopic pancreas as part of the differential diagnosis.
김상현,서창균,조호찬,이승현,윤태승,허지안,조주연,박재호 啓明大學校 醫科大學 2002 계명의대학술지 Vol.21 No.1
Statin이 혈중 근효소에 미치는 영향을 알아보기 위하여 이 연구를 시행하였으며, cerivastatin을 사용한 환자 군에서 다른 statin 사용 군보다 의미 있는 CK 및 AST치의 상승을 보였다(p<0.05). 또한 CK가 기준치보다 3배 이상 증가된 환자도 cerivastatin을 사용한 환자 군에서는 발생하였으나, 다른 statin 사용 군에서는 발생하지 않았다(p<0.05). Hypercholesterolemia is firmly established as a risk factor for the development of atherosclerosis. Cerivastatin is a third generation statin, a synthetic HMG-CoA reductase inhibitor which lowers plasma cholesterol level by inhibiting endogenous cholesterol synthesis. It has also been reported that cerivastatin is relatively well tolerated and has a low incidence of adverse effects. It has been also reported that less than 1% of the patients treated with cerivastatin experienced clinically significant elevation of muscle enzymes. The purpose of this study was to investigate the effect of cerivastatin on serum muscle enzymes. The patients with primary hypercholesterolemia were treated with statin at least 4 weeks in Keimyung University Dongsan Medical Center. We compared the effect of Cerivastatin treatment (group A, 33 patients) on changes of muscle enzymes including creatine kinase (CK), aspartate transaminase (AST) and lac-tate dehydrogenase (LDH) with other statin treatment group (group B, 46 patients). The group A produced statistically significant elevation of CK and AST (p<0.05) after treatment with cerivastatin when compared to the group B. More than three fold elevation of CK level was developed only in the group A (p=0.02). These results indicate that cerivastatin induces higher incidence of muscle enzymes elevation than other statins.
머시닝센터를 이용한 내면 스러스트 연삭가공에 관한 연구
최환,서창연,박원규,이충석 한국기계가공학회 2015 한국기계가공학회지 Vol.14 No.4
In this paper, the grinding characteristics of internal thrust grinding were studied with vitreous CBN wheels using a machining center. Grinding experiments were performed according to grinding conditions, such as wheel feed speed and depth of cut, workpiece speed, and rate of grinding width. Additionally, the grinding force and grinding ratio were investigated though these experiments. Based on the experimental results, the grinding characteristics of internal thrust grinding were discussed.
최환(Hwan Choi),서창연(Chang-Yeon Seo),서영일(Young-Il Seo),이충석(Choong-Seok Lee) 한국기계가공학회 2016 한국기계가공학회지 Vol.15 No.5
In this paper, the grinding characteristics in thrust internal grinding have been studied using vitreous CBN wheels with a machining center. Grinding experiments have been performed according to grinding conditions such as wheel feed speed, cut depth, workpiece speed, rate of grinding width and number of grinding passes. The machining error, shape of machined surfaces, grinding force, and surface roughness have been investigated though these experiments. Based on the experimental results, the grinding characteristics on the machined surface in the internal thrust grinding are discussed.
최환(Hwan Choi),서창연(Chang-Yeon Seo),서영일(Young-Il Seo),이충석(Choong-Seok Lee) 한국기계가공학회 2016 한국기계가공학회지 Vol.15 No.1
In this paper, the grinding characteristics in internal grinding methods(plunge, thrust) were studied with vitreous CBN wheels using machining center. Grinding experiments were performed according to the same material removal rate conditions such as a wheel speed, depth of cut and workpiece speed. And the grinding force, machining error and grinding ratio were investigated though these experiments. Based on the experimental results, the grinding characteristics on internal grinding methods were compared.
국내 유전용혈빈혈:1997년∼2006년간의 후향적 조사 -대한혈액학회 유전용혈빈혈연구회 보고-
조희순,하정옥,강임주,곽재용,구홍회,국훈,김병국,김순기,김승택,김영대,김지윤,김철수,김태형,김흥식,박상규,박선양,박준은,방수미,서종진,서창인,손상균,신호진,신희영,안효섭,오도연,유은선,유철주,윤성수,이건수,이광철,이기현,이순용,이영호,이정애,이종석,임영탁,임재영,임호준,정대철,정소영,정주섭,정혜림,조군제,조덕연,진종률,최은진,현명수,황평한,강형진 대한혈액학회 2007 Blood Research Vol.42 No.3
BACKGROUND: The aim of this study was to investigate the prevalence, clinical and laboratory findings of hereditary hemolytic anemia (HHA) in Korea from 1997 to 2006 and to develop the appropriate diagnostic approach for HHA.0aMETHODS: By the use of questionnaires, information on the clinical and laboratory findings ofHHA diagnosed from 1997 to 2006 in Korea was collected and analyzed retrospectively. A total of 431 cases were enrolled in this study from 46 departments of 35 hospitals.0aRESULTS: The overall frequency of HHA did not change through the 10-year period for pediatrics but did show an increasing tendency for internal medicine. The overall male to female sex ratio did not show sex predominance (1.17:1), but a significant male predominance with a ratio of 1.49:1 was seen for pediatrics while a significant female predominance with a ratio of 1:1.97 was seen forinternal medicine. Of the total cases, 74.2% (282/431) were diagnosed before the age of 15 years. The etiologies of HHA were classified as red cell membrane defects, hemoglobinopathies, red cell enzyme deficiencies and unknown causes. There were 382 cases (88.6%) of red cell membrane defects with 376 cases (87.2%) of hereditary spherocytosis and 6 cases (1.4%) of hereditary elliptocytosis, 20 cases (4.6%) of hemoglobinopathies with 18 cases (4.2%) of beta-thalassemia, a case (0.2%) of alpha-thalassemia and a case (0.2%) of Hemoglobin Madrid, 7 cases (1.6%) of red cell enzyme deficiencies with 5 cases (1.2%) of glucose-6- phosphate dehydrogenase (G-6-PD) deficiency, a case (0.2%) of pyruvate kinase (PK) deficiency and a case (0.2%) of enolase deficiency, and 22 cases (5.1%) of unknown causes. The most common chief complaint in pediatric patients was pallor and that in adult patients was jaundice. In the red cell membrane defect group of patients, the level of hemoglobin was significantly higher than in adult patients. The mean corpuscular volume, mean corpuscular hemoglobin, corrected reticulocyte count, total and indirect bilirubin level and lactate dehydrogenase levels in the hemoglobinopathy group of patients were significantly lower than the values in the red cell membrane defect group of patients. The mean concentration of G-6-PD was 0.81010 RBC in the PK deficient patient, and the level of enolase was 0.04U/g of Hb in the enolase deficient patient.0aCONCLUSION: The most prevalent cause of HHA in Korea during 1997 to 2006 was hereditary spherocytosis, but HHA by other causes such as hemoglobinopathy and red cell enzyme deficiency gradually increased with the development of molecular diagnostic methods and increasing general interest. However, the etiologies of HHA need to be pursued further in 5.1% of the patients. An systematic standard diagnostic approach is needed in a nationwide prospective study for correct diagnoses and appropriate management of HHA.