Controlled infiltration profile of SiC coating layer on graphite by Si vapor deposition reaction

Kuk-Jin Hwang,Si-Young Bae,Kyoung-Ho Kim,Yoon-Cheol Lee,Jung-Tae Hwang,Heesoo Lee,Seong Min Jeong,Myung-Hyun Lee 한양대학교 세라믹연구소 2019 Journal of Ceramic Processing Research Vol.20 No.2

SiC-coated graphite was successfully fabricated at different temperatures (1300-1600 oC) through a silicon vapor depositionreaction (Si-VDR) process. Si powder was used for the Si source of the SiC coating layers. When Si powder was evaporatedat high temperature near the melting point of bulk Si, Si gases are moved and changed into Si liquid at the surface of thegraphite. The high-temperature process facilitated the formation of SiC coating layers on the graphite. The microstructural,mechanical, and thermal oxidation properties of the coated graphite were investigated.

고령자 급성 췌장염의 임상적 고찰

이진헌,강진경,박인서,송건훈,정재복,백용한,송시영,서정훈 대한소화기학회 1998 대한소화기학회지 Vol.32 No.3

Background/Aims: Inflammatory diseasas of the pancreas are not uncommon. The advanced age is one of the significant factors in assessing the severity of acute pancreatitis. It has been shown that the biliary tract disease is a more frequent cause of acute pancreatitis in the elderly than in the young. With the increased life span, the elderly are comprising a large proportion of the population. As a result, physicians are more often being faced with acute pancreatitis in the elderly. The purpose af this study was to evaluate clinical features of acute panereatitis in the elderly. Methods: A total of 188 patients with acute pancreatitis were reviewed. We investigated the differences of clinical characteristics between the elderly patients aged over 60 and the young patients aged under 60. Results: The sex distribution showed male preponderance in the young patients (M:F=2.4:1), but was nearly equal in the elderly patients (M:F=1.1:1). The most common cause of acute pancreatitis in the elderly was biliary tract disease (52.5%), while alcohol abuse was the most common cause in the young patients (38.8%), Local complications of acute pancreatitis, such as psuedocyst, necrosis, abscesses were not differently shown between the elderly (16.9%) and the young (20.2%) patients. Systemic complications including acute puhnonary failure occurred more frequently in the elderly patients than the young patients. The mortality rate of the elderly patients (5.1%) was not significantly different from that of the young patients (3.1%). Conclusions: To detect correctable underlying bihary tract diseases the elderly patients with acute pancreatitis should be completely investigated using endoscopic retrograde cholangiopancreatography (ERCP). In addition, the patient should be closely monitored for the development of the systemic complications during the disease process.

슬관절통 환자에서 초저온 냉기를 이용한 한냉치료후시각적상사척도값의 변화

이정권,김미정,박시복,김영호 大韓再活醫學會 1999 Annals of Rehabilitation Medicine Vol.23 No.1

항울제 및 항정신병 약물로 유발된 섬망상태 1례

정향균,김영철,이시형 大韓神經精神醫學會 1988 신경정신의학 Vol.27 No.2

The authors reported a case of tricyclic and antipsychotic agent induced delirium. The patient was a 64 years old man who had been treated by drugs with anticholinergic properties (amitriptyline-thioridazine combination) and showed the characteristic symptoms of delirium such as confused mentality, disorientation, auditory and visual hallucination, the change of diurnal cycle, attention disturbance and hyperactivity. Discontinued the administration of amitriptyline and thioridazine and substituted haloperidol and lorazepam, delirious symptoms were improved within 5 day.

중환자에서 중심정맥 산소포화도를 이용한 혈역학적 지표의 예측

김시영,민영기,이영주,정윤석 대한응급의학회 2003 대한응급의학회지 Vol.14 No.1

Purpose: Mixed venous oxygen saturation (Smvo_2) and other hemodynamic parameters are highly useful in the monitoring of critically ill patients, but the measurement of Smvo_2requires catheterization of the pulmonary artery. In contrast, central venous oxygen saturation (Scvo_2) can be easily obtained with a central venous catheter, which is less invasive. To assess if Scvo_2could be a useful value in the treatment of critically ill patients, we evaluated the agreement and the relationship between Scvo_2 and Smvo_2 Futhermore, the correlations of Scvo_2 with other additional parameters were investigated. Methods: During 18 months, 83 patients in the intensive care unit (ICU) of Ajou university hospital were included. Scvo_2, Smvo_2, the cardiac index (CI), the oxygen extraction ratio (OER), the oxygen uptake (Vo_2), and the oxygen delivery (Do_2) were obtained by using a pulmonary artery catheter. Results: There was a difference between Scvo_2and Smvo_2(76.32±7.86 vs 73.79±6.31, p<0.001). The relationship between the two measures showed a meaningful correlation (r=0.700, p<0.01). Scvo_2also had correlations with the Cl (r=0.326, p<0.05), the OER (r=-O.467, p<0.01), the Vo_2(r=-O.393, p<0.01), and the Do_2(r=0.422, p<0.01). Conclusion: Although the Scvo_2, value cannot replace the Smvo_2value, it shows a relation with Smvo_2 and other parameters. Thus, Scvo_2 is suggested as a hemodynamic value for use with critically ill patients.

Effects of Phenytoin and Diazepam on the Seizure Activity in the Cortical Dysplasia Animal Models

Kim, Si-Hyung,Choi, In-Sun,Cho, Jin-Hwa,Park, Eun-Ju,Jang, Il-Sung,Choi, Byung-Ju,Kim, Hyun-Jung,Kim, Young-Jin,Nam, Soon-Hyeun The Korean Academy of Oral Biology 2006 International Journal of Oral Biology Vol.31 No.2

Dysplasia-associated seizure disorders are markedly resistant to pharmacological intervention. Relatively little research has been conducted studying the effects of antiepileptic drugs(AEDs) on seizure activity in a rat model of dysplasia. We have used rats exposed to methylazoxymethanol acetate(MAM) in utero, an animal model featuring nodular heterotopia, to investigate the effects of AEDs in the dysplastic brain. Pilocarpine was used to induce acute seizure in MAM-exposed and age-matched vehicle-injucted control animals. Field potential recordings were used to monitor amplitude and numbers population spikes, and paired pulse inhibition in response to stimulation of commissural pathway. Two commonly used AEDs were tested: diazepam 5, 2.5mg/kg;phenytoin 40, 60mg/kg. Diazepam(DZP) and phenytoin(PHT) reduced the amplitude of population spike in control and MAM-exposed rats. However, the amplitude of population spike was nearly eliminated in control rats as compared to the MAM-exposed rats. Pharmaco-resistance was tested by measuring seizure latencies in awake rats after pilocarpine administration(320mg/kg, i.p.) with and without pretreatment with AEDs. Pre-treatment with PHT 60 mg prolonged seizure latency in control rats, but not in MAM-exposed animals. The main findings of this study are that acute seizures initiated in MAM-exposed rats are relatively resistant to standard AEDs assessed in vivo. These data suggest that animal model with cortical dysplasia can be used to screen the effects of potential AEDs.

내시경적 조임근절개술후에 발생한 췌십이지장 가성동맥류 1예

박수영,김윤정,박진한,전현수,박시형,이영진,이은지,김지현 仁濟大學校 白病院 2010 仁濟醫學 Vol.31 No.-

We reported a case of pancreatic pseudoaneurysm, involving pancreaticoduodenal artery, developed after endoscopic retrograde cholangiopancreatography(ERCP) with endoscopic sphinterotomy. A 54 year old woman was transferred to our hospital due to sustained hematochezia and hypovolemia. A week before admission, she underwent ERCP with endoscopic sphinterotomy for acute cholangitis in local clinics. She developed abdominal pain and hematochezia at 12 hours after the procedures. A post procedure contrast enhanced computed tomography of abdomen demonstrated a pseudoaneurysm in inferior portion of pancreatic head. This was not present on the pre procedure contrast enhanced computed tomography of abdomen and was thought to arise from the pancreaticoduodenal artery as a complication of the pre sphincterotomy. She was brought to our emergency room in a state of hypovolemia. A upper endoscopy showed active bleeding from ampula of vater. An celiac angiography demonstrated pancreatic pseudoaneurysm involving inferior pancreaticoduodenal artery and selective coil embolization of was performed.

기능성 위장관 장애에서 혈청 IL-1β, IL-2,IL-6의 변화 : 우울증 및 스트레스와의 상관성

박시성,이상신,박무인,구자영,박제민,김명정 한국정신신체의학회 2002 정신신체의학 Vol.10 No.2

곰팡이 오염된 사료를 섭취한 개에서 신부전과 calcium oxalate-like crystal

육현정,손화영,류시윤,조성환 충남대학교 수의과대학 동물의과학연구소 2004 動物醫科學硏究誌 Vol.12 No.-

In March and July 2004, 2-year-old female Yorkshire Terrier and 7-year-old female Shih-Tzu were referred to the College of Veterinary Medicine, Chungnam National University. Clinically, two dogs showed anorexia, vomiting and emaciation. The signs had occurred after the dogs were fed diets infected with oxalate-producing fungi. At necropsy, Shih Tzu had severe renal damage with the green-yellowish colored uroliths in the renal pelvis and the both kidneys were extremely reduced in sizes. Microscopically, Yorkshire Terrier had acute nephritis contained necrotized and degenerated tubular epithelial cells in cortex. Numerous calcium oxalate-like crystals were infiltrated into most tubules, especially the proximal convoluted tubules. Shih Tzu showed chronic nephritis with nephrosclerosis displaced by fibrous connective tissue in most areas. The glomeruli had undergone all stages of variation such as degeneration and fibrosis.

단체교섭의 메카니즘에 관한 연구

강정대,양시영 全北大學校 1996 論文集 Vol.42 No.-

With the democratization of industrial and labor relations in Korea, collective bargaining has emerged as the most important social phenomena. This study, through the examination of various bargaining power, style theories and comparison the model of bargaining partner of three countries, if aimed at finding out the sucessful bargaining model that can satisfy both labor and management. Bargaining partner model (1)Germany : The ability to conclude collective agreements (2)U.S.A. : Appropriate bargaining unit (3)Japan : Bargaining partner under the provisions of constitional law and trade union act Collective bargaining power various according to the viewpoint of bargaining power, collective bargaining power depends upon several complex requestes rather than a single one. The study on collective bargaining power theories has been made through several board approaches such as the economics approach, behavioral secience approach, integative approach(Kochan, T.A. & Katz, H.C.,). It is necessary to apply rigorous methodologies such as study on the bargaining partner in various types of bargaining, study on the bargaining power, and study on the strike-adjustment ability in order to expand the application of integrate collective bargaining study.