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함침 - 환원법에 의한 고분자 전해질형 연료전지 막 / 전극 어셈블리의 제조 및 특성화
박대진(Dae Jin Park),최경환(Kyoung Hwan Choi),이승재(Seung Jae Lee),설용건(Yong Gun Shul),이태희(Tae Hee Lee) 한국화학공학회 1997 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.35 No.1
Membrane/electrode assemblies for polymer electrolyte membrane fuel cell were fabricated by impregnation-reduction method, and effects of fabrication conditions and assembly structures on the cell performance were investigated in a single cell. The optimal fabrication condition of the membrane/electrode assembly was 1 mM Pt(NH₃)₄Cl₂ impregnation for 60 minutes and 1 mM NaOH₄ reduction for 2 hours in this experiment. The fuel cell performance could be improved by making the electrode structure not to have large particle creation and thick catalyst layer formation on the membrane. The AC impedance measurement showed that high cell performance corresponded to low interfacial resistance of the oxygen electrode and to high double layer capacitance.
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모야모야 병, 관상동맥 협착 및 확장형 심근병증을 동반한 말단비대증
이대호(Dae Ho Lee),김용주(Yong Joo Kim),이대배(Dae Bae Lee),박재홍(Jae Hong Park),정동진(Dong Jin Chung),정민영(Min Young Chung),이태희(Tai Hee Lee) 대한내과학회 2000 대한내과학회지 Vol.58 No.2
A 19-year-old girl with typical features of acromegaly, duration of which was thought to be above 10 years, presented with dyspnea. After serial studies, dilated cardiomyopathy and critical stenosis of left anterior descending coronary artery were demonstrated. Brain MRI revealed the following changes: the pituitary gland was enlarged and its upper margin was upwardly convex; severe cerebral atrophy and multiple signs of vascular abnormalities were present. Cerebral angiographic studies demonstrated the presence of complete occlusion of left carotid artery and severe stenosis of right carotid artery with the formation of collateral networks of vessels. The patient was thus diagnosed as having moyamoya disease that was thought to be congenital according to her past histories. Her cardiac function was slightly improved after percutaneous transluminal coronary angioplasty. Operation for the pituitary lesion and moyamoya disease was not performed due to poor general condition, but serum growth hormone concentration was adequately suppressed after octreotide therapy. We consider that this is a very rare case of acromegaly associated with moyamoya disease, coronary arterial disease and dilated cardiomyopathy.(Korean J Med 58:227-233, 2000)
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열 사이클에 따른 고체산화물 연료전지의 기계적 및 전기적 특성
양수용,박재근,이태희,유정대,유영성,박진우,Yang, Su-Yong,Park, Jae-Keun,Lee, Tae-Hee,Yu, Jung-Dae,Yoo, Young-Sung,Park, Jin-Woo 한국세라믹학회 2006 한국세라믹학회지 Vol.43 No.12
Mechanical and electrical performance of anode-supported SOFC single cells were analyzed after thermal cyclic operation. The experiments of thermal cyclic cell-operation were carried out four times and performance of each cell was measured at different temperatures of 650, 700, and $750^{\circ}C$, respectively. As increasing the number of thermal cycle test, single cells showed poor I-V characteristics and lower 4-point bending strength. The anode polarization was also measured by AC-impedance analysis. The observation of the microstructure of the anodes in single cells proved that the average particle size of Ni decreased and the porosity of anode increased. It is thought that the thermal cycle caused the degradation of performance of single cells by reducing the density of three-phase boundary region.
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권순대 ( Sun Dae Kwon ),이태희 ( Tae He Lee ),권진경 ( Jin Kyung Kwon ),박성배 ( Sung Bae Park ),김현철 ( Hyun Chul Kim ) 대한류마티스학회 1997 대한류마티스학회지 Vol.4 No.2
Systemic lupus erythematosus is a systemic disorder which has frequent involvement of gastrointestinal tract. Non-specific symptoms such as anorexia, nausea, diarrhea and abdominal pain are well known symptoms when the gastrointestinal tract is involved. The most feared gastrointestinal complication of systemic lupus erythematosus is lupus enteritis. The pathological change in lupus enteritis is usually a result of mesenteric vasculitis. Major complications such as intestinal bleeding and perforation may occur and sometimes result in sugery. Because of high mortality rate in case of major complications, early diagnosis and appropriate treatment is very important. We experienced three patients with lupus enteritis who presented with severe abdominal pain and dirrhea. They were diagnosed by characteristic radiographical findings of small bowel series and barium study. All radiographical findings has been resolved completely with the steroid therapy. Conclusively we can induce complete remission by steroid therapy alone, if we diagnose lupus enteritis in the early period of disease course.
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안재수 ( An Jae Su ),최은진 ( Choe Eun Jin ),박상선 ( Park Sang Seon ),이대호 ( Lee Dae Ho ),정민영 ( Jeong Min Yeong ),이태희 ( Lee Tae Hui ) 대한내과학회 1993 대한내과학회지 Vol.44 No.1
Background : HbA_1C is formed slowly throughout the 120-day life span of the red blood cell by non-enzymatic glycosylation of HbA_O. HbA_1C concentrations reflect mean blood glucose levels over the previous several weeks, but we experienced the changes of hemoglobin A_1C values according to the short term changes of blood glucose levels. We investigated the changes of HbA_1C values with a HPLC technique according to the short term changes of blood glucose concentration. Method : HbA_1C values were measured at fasting and postprandial 2-hour state with a HPLC method in 166 NIDDM patients, and they are divided into three groups (Group Ⅰ : ??HbA_1C<-0.3%, Group Ⅱ : ??HbA_1C>0.3%, Group Ⅲ : -0.3%≤??HbA_1C≤0.3, ??HbA_1C : postprandial 2 hour HbAlc values-fasting HbA_1C values) and compared respectively. In 15 untreated NIDDM patients, blood glucose and HbA_1C were measured during the oral glucose tolerance test to exclude the influence of food and treatment on the HPLC method. Stable HbA_1C and labile HbA_1C were measured in 37 NIDDM patients to evaluate the influence of labile HbAlC on the HPLC method. Results : 1) In group Ⅰ, Ⅱ, Ⅲ, Postprandial 2-hour blood glucose levels (man±SEM) were 185.1±33.42mg/dl, 306. different respectively (p<0.01). fasting blood glucose levels, fasting HbA_1C values and postprandial 2-hour HbA_1C values were not significantly different among three gruops. 2) In group Ⅰ, Ⅱ, Ⅲ, the differences between postprandial 2-hour levels and fasting blood glucose levels were -79.8±43.79mg/dl, 103.2±14.61mg/dl, 42.9±11.17mg/dl, and the differences were highly significant (p<0.001). The mean ??HbA_1C values were -0.6±0.49%, 0.6±0.33, 0.08±0.01% respectively. 3) In 15 untreated NIDDM patients, HbA_1C values were significantly increased from 7.2±1.3% to 7.8±1.9% according to the increment of blood glucose levels from 164.1±9.61mg/dl to 285.3±14.42mg/dl (p<0.001), but stable HbA_1C values were not significantly changed. 5) Correlation between labile HbA_1C and blood glucose (r=0.41, p<0.001) was higher than that between stable HbA_1C and blood glucose (r=0.28, p<0.001). Conclusion :From the above results we can find that HbA_1C values measured with a HPLC technique change according to the short term changes of blood glucose levels, and the changes of HbA_1C values are caused by the short term changes of labile HbA_1C values.
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마제신과 장이상회전을 동반한 Turner 증후군 1 예
장현주(Hyun Ju Chang),강호철(Ho Cheol Kang),강유호(Yu Ho Kang),안재수(Jae Su Ahn),최은진(Eun Jin Choi),이대호(Dae Ho Lee),박상선(Sang Seon Park),조재현(Jae Hyun Cho),정민영(Min Young Chung),이태희(Tae Hee Lee) 대한내과학회 1992 대한내과학회지 Vol.43 No.5
We report a 32-year-old female of 45, XO Turner`s syndrome associated with horseshoe kidney and intestinal malrotation who was admitted due to abdominal discomfort, epigastralgia and excessive belching. We present this case with a review of the literature
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