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김성배(Sung Bae Kim),김상희(Sang Hee Kim),김상위(Sang We Kim),서철원(Cheol Won Suh),이규형(Kyoo Hyung Lee),이정신(Jung Shin Lee),김해련(Hae Ryun Kim),민영일(Young Il Min),송호영(Ho Young Song),최은경(Eun Kyung Choi),이재원(Jae Won Le 대한내과학회 1995 대한내과학회지 Vol.48 No.5
N/A Objectives: Patients with esophageal cancer and a malignant tracheoesophageal fistula(TEF)have an extremely poor prognosis, with or without treatment. However, the presence of a TEF has historically been considered a relative contraindication to radiation therapy. Methods: To determine the appropriate treatmement(use of radiation therapy)for patients with esophageal cancer and malignant TEF, a review was performed of all such cases, obeserved at Asan Medical Center between 1989 and 1993. Results: 1) Six patients with malignant TEF were seen in total 130 esophageal cancer patients, so the incidence was 4.6%. 2) All of the patients were male, had squamous cell histologies. 3) Dysphagia as initial presenting symptom was a chief complaint in all six patients. 4) The number of TEF formation was one in five of six patients, two in the rest. 5) Three TEFs were developed during radiotherapy, two of them stopped radiation therapy, and one patient continued to treat with hyperfractionated radiation and cured. 6) The median survival length was 33(3-60) weeks after initial tumor diagnosis and 16(2-39) weeks after the first TEF occurred. The duration between initial tumor diagnosis and TEF formation was 17.6(0.6-22) weeks. 7) As a pllliative aim, gastrostomy was done in two patients, jejunostomy in one patient, and stent insertion in the other two patients. Associated symptoms with TEF were markedly improved after stent insertion. 8) The cause of death was sepsis as a resulf of aspiration pnenumonia and lung abscess in five of six patients, and advanced esophageal cancer with lung metastasis in the rest. Conclusion: Early detection and proper management were essential in malignant TEF and esophageal cancer. Stent insertion was good palliation. Radiation therapy might be initiated or continued in the presence of a TEF, and eventual resolution of the fistula might occur. Prospective randomized trials are necessary to define the role of radiation treatment, and further attempts to improve the malignt TEF are required.
불포화 다공성 매질체의 공기-물 경계면 비표면적 계산모델 분석
김민규 ( Kim Min-kyu ),김성배 ( Kim Song-bae ),박성직 ( Park Seong-jik ) 한국농공학회 2006 한국농공학회논문집 Vol.48 No.5
In unsaturated porous media, the air-water interface (AWI) plays an important role in removing of biocolloids such as bacteria, viruses, and protozoan (oo)cysts. In this study, four models related to calculation of specific AWI area are analyzed to determine the appropriate model, and the selected models are verified using the previously reported experimental data. The results indicate that the modified model from Niemet et al. (2002) is the most appropriate tool for calculating the specific AWI area using the van Genuchten (1980) parameters obtained from the water retention curve. Hence, it is expected that this model could be used to quantitatively determine the attachment of biocolloids to AWI in the transport modeling of biocolloids in unsaturated porous media.
김현정 ( Kim Hyon-chong ),박성직 ( Park Seong-jik ),이창구 ( Lee Chang-gu ),한용운 ( Han Yong-un ),김성배 ( Kim Song-bae ) 한국농공학회 2008 한국농공학회 학술대회초록집 Vol.2008 No.-
In this study, attachment of bacteria in granular activated carbon (GAC) was investigated using column experiments. Bacterial species used in the study was Enterococcus faecalis ATCC 10100. The experiments were performed with coconut-based GAC and iron-impregnated GAC under two different ionic strength conditions. In coconut-based GAC, about 77.3% of bacteria was attached in 1 mM while in 10 mM about 61.6% was attached. In iron-impregnated GAC, about 62.6% was attached in 1 mM ionic strength while about 53.3% was attached in 10 mM. Results showed that ionic strength and iron-impregnation could enhance the bacterial attachment in GAC.