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정현채(Jung Hyun Chai),선경호(Sun Kyung Ho),조재선(Jo Jae Sun),남상열(Nam Sang Yul) 한국태양에너지학회 1991 한국태양에너지학회 논문집 Vol.11 No.3
태양열 온수기로부터 획득한 50~60℃의 온수를 이용하여 수온이 낮은 3, 4, 10, 11월은 물론 한 겨울철에서도 미꾸리의 최적 성장온도를 유지시켰던 바 다음과 같은 결과를 얻었다.<br/> 가. 전장 4~5㎝, 체중 1~2g 정도의 미꾸리의 최적 성장수은은 18~20℃이고 5~7㎝, 2~3g인 것은 20~22℃이고 7~9㎝, 4~6g 인 것은 22~24℃의 수온임을 알아냈다.<br/> 나. 1~3g의 개체는 서서히 성장하나 4~8g의 것은 성장이 빠르고 총개체수의 무게 총량은 1개월간에 약 30~50g 증가하였다. We have maintained the optimum water temperature for misgurnus in winter season by solar thermal heating energy.<br/> The optimum temperatures for the misgurnus anguillicaudatus were experimentally estimated, i.e. for the total length 4~5㎝ and body weight 1~2g, the optimum temperature was 18~20℃. For the total length 5~7㎝, body weight 2~3g was 20~22℃ and for the total length 7~9㎝, body weight 4~6g was 22~24℃.<br/> The smaller misgurnas(1~3g) grows relatively slow but the bigger one(4~8g) grows relatively fast and total average body weight increment was about 30~50g per month.
만성 염증성 장질환 및 감염성 대장염 환자의 대장상피 세포에서의 HLA - DR 항원 발현 양상
정현채(Hyun Chae Jung),이준혁(Joon Hyeok Lee),김우호(Woo Ho Kim),송인성(In Sung Song),최규완(Kyoo Wan Choi),김정룡(Chung Yong Kim),김정목(Jung Mogg Kim) 대한내과학회 1995 대한내과학회지 Vol.48 No.5
Objective: Since it was reported that expression of HLA-DR antigen by colonic epithelial cells was observed in inflammatory bowel disease, whether this phenomenon is specific for idiopathic inflammatory bowel disease has been controversial. Furthermore, studies concerning the expression of HLA-DR antigen in tuberculous colitis, one of the most common diseases which need differential diagnosis with idioapthic inflammatory bowel diseases in Korea, and Behcet's colitis, rare in Western countries, have not been reported as yet. The purposes of this study are to test the hypothesis that the expression of HLA-DR antigen by colonic epithelium is specific for idiopathic inflammatory bowel disease, and to observe the pattern of the colonic expression of HLA-DR antigen in Behcet's colitis and to compare with ulcerative colitis and Crohn's disease. Methods: Multiple colonoscopic biopsies were performed on fifty eight patients(twenty seven ulcerative colitis, four Crohn's disease, nine Behcet's colitis, nine infectious colitis, and nine normal control). Immunohistochemical staining using mouse monoclonal anti-HLA-DR antibody was performed on each biopsy specimens, and was compared according to its histologic activity. Results: 1) In the ulcerative colitis group, 77.2% of specimens with histologically active inflammation expressed HLA-DR antigen, whereas only 15.6% of specimens without active inflammation did, showing significant difference(p<0.005). 2) In the Crohn's disease group and the infectious colitis group, specimens with histologically active inflammation(58.3% and 60.0%) showed higher positive rate than specimens without histologically active inflammation(12.5% and 40.0%), but statistical significance was not observed(p>0.05). 3) Colonic epithelial cells of the Behcet's disease group expressed HLA-DR antigen only in 18.8% of specimens with histologically active inflammation, showing significantly lower rate of positive expression than other inflammatory bowel diseases with active inflammation(67.3%, p<0.005). 4) Overall, 52.2% of specimens with active inflammation expressed epithelial HLA-DR antigen, showing significantly higher rate of positive expression than specimens without active inflammation(19.8%, p<0.005). Conclusion: The epithelial expression of HLA-DR antigen in inflammatory bowel disease seems to be a nonspecific parameter indicating active histologic inflammation, especially in ulcerative colitis, and cannot be used in differential diagnosis of tuberculous colitis and Crohn's disease. However, in Behcet's colitis, the frequency of HLA-DR antigen expression by colonic epithelium is significantly lower than other inflammatory bowel disease, therefore a different immunopathophysiologic mechanism is suggested, which needs further investigation.
꽃 저장용 냉장시스템과 태양열 복합형 급탕기 개발연구(1)
정현채(Jung Hyun Chai),김기선(Kim Ki Sun),선경호(Sun Kyung Ho) 한국태양에너지학회 1992 한국태양에너지학회 논문집 Vol.12 No.3
본 연구에서는 꽃저장용 냉장시스템 등에 태양열을 이용할 수 있는 난방시스템을 조합하여 충분한 양의 고온을 확득하여 주택의 난방을 가능케 하는 시스템을 설계, 제작했다. 압축기는 기존의 압축기 냉각방식을 공냉식에서 수냉식으로 전환시켜 적절한 냉각효과의 증대는 물론 냉열을 회수하여 고온의 온수를 빠른 시간 내에 획득할 수 있는 시스템을 개발했다. Solar assisted heat pump with Freon circulating system has been developed. Revising the cool chamber (flower storage) with the solar thermal hot water producing system, the more amount of hot water can be produced, which can be even used for room panel heating. The compressor was cooled by water jaket instead of air cooled so that the system energy efficiency was improved quite well.