http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
유동층을 이용한 유 , 무연탄 혼합 연소로에서 대기오염물질 생성과 연소효율 연구
조상원,민병철 ( Sang Won Cho,Byoung Chul Min ) 한국공업화학회 1997 공업화학 Vol.8 No.3
본 연구는 유동충연소로에서 유,무연탄 혼합연소시 대기오염물질 발생과 연소효율에 관하여 실험하였으며, 실험결과는 다음과 같다. 유동층연소로 높이가 증가할수록 이산화황과 질소산화물의 농도는 증가하는 것으로 나타났으며, 무연탄 혼합비가 증가할수록 이산화황의 농도는 증가하였으나 질소산화물농도는 큰 변화가 없었다. 무연탄 혼합비가 증가할수록 비산유출율도 증가하였고 주입 가연성분에 대한 유출 가연성분비도 증가하였다. 또한, 무연탄 혼합비에 관계없이 비산유출입자의 평균입경에 따른 미연분 함량은 미세입자에서 대체로 높게 나타났다. 한편, 연소효율은 층온도 850℃ 이상과 과잉공기 20% 이상에서 큰 차이를 보이지 않았으므로 유속 0.3m/s, 층온도 850℃, 과잉공기비 20%의 조건으로 혼합연소시키는 것이 적절한 것으로 나타났다. We have been studied that combustion efficiency and the production of air pollution of anthracite-bituminous coal blend in a fluidized bed coal combustor. Also, the reaching time of steady state condition have been studied. This experimental results are presented as follows. As the height of fluidized bed combustor becomes higher, the concentrations of SO₂ and NO_x mainly increased. Also, as anthracite fraction increased, the emission of SO₂ concentration was increased but, the variation of NOx concentration was negligible according to anthracite fraction. When anthracite fraction ratio was increased, elutriation rate was increased and exit combustible content over feeding combustible content was increased. Regardless of anthracite fraction ratio the uncombustible weight percentage according to average diameter of elutriation particles were approximately high in the case of fine particles. Over bed temperature 850℃ and excess air 20%, the difference of combution efficiencies were little. It is estimate that the combustion condition in anthracite-bituminous coal blend combustion is suitable at the velocity 0.3 m/s, bed temperature 850℃, the excess air 20 %.
나노 윤활유를 이용한 스크롤 압축기 스러스트 베어링의 윤활특성 평가
조상원(Sang Won Cho),김홍석(Hong Seok Kim),안영철(Young Chull Ahn),이정언(Jung Eun Lee),이재근(Jae Keun Lee),이형국(Hyeong Kook Lee),이병철(Byeong Chul Lee),김동한(Dong Han Kim),박진성(Jin Sung Park) 대한설비공학회 2006 대한설비공학회 학술발표대회논문집 Vol.2006 No.4
This paper presents the friction and anti-wear characteristics of nano-oil with a mixture of a refrigerant oil and carbon nano-particles in the thrust slide-bearing of scroll compressors. Frictional loss in the thrust slide-bearing occupies a large part of total mechanical loss in scroll compressors. The characteristics of friction and anti-wear using nano-oil is evaluated using the thrust bearing tester for measuring friction surface temperature and the coefficient of friction at the thrust slide-bearing as a function of normal loads up to 4,000 N and orbiting speed up to 3,200 rpm. It is found that the coefficient of friction increases with decreasing orbiting speed and normal force. The friction coefficient of carbon nano-oil is 0.015, while that of pure oil is 0.023 under the conditions of refrigerant gas R-22 at the pressure of 5 bars. It is believed that carbon nano-particles can be coated on the friction surfaces and the interaction of nano-particles between surfaces can be improved the lubrication in the friction surfaces. Carbon nano-oilenhances the characteristics of the anti-wear and friction at the thrust slide-bearing of scroll compressors.
조상원 ( Sang Won Cho ),이근무 ( Gun Moo Lee ),박진성 ( Jin Sung Park ),권재우 ( Jae Woo Kwon ),김자경 ( Ja Kyoung Kim ) 대한천식알레르기학회(구 대한알레르기학회) 2017 Allergy Asthma & Respiratory Disease Vol.5 No.6
Purpose: Ultrarush immunotherapy (ultra-RIT) is more convenient and higher compliant than conventional immunotherapy, but it has rarely used in clinical practice due to severe systemic reactions. This study aimed to determine the safety of ultra-RIT in children and adolescents. Methods: We investigated 19 patients who received ultra-RIT with the same schedule between January 2011 and May 2016. They were sensitized to house dust mites (HDMs) and/or pollen and had their symptoms associated with positive allergens. Over a 1-day hospitalization period, all patients received ultra-RIT subcutaneously 3 times, increasing at hourly intervals. Systemic reactions were classified according to the World Allergy Organization grade system. Results: Systemic reactions occurred in 14 patients (73.7%). The mean time to adverse reactions after the last injection was 36 minutes, and the majority of systemic reactions were pruritus and urticaria. In addition, the injection of HDM alone or HDM plus pollen caused more than grade 2 systemic reactions in about 50% each of the patients. Conclusion: Since ultra-RIT caused a higher incidence of systemic reactions in children and adolescents, it should be carried out cautiously in the hospitalization rather than the office. (Allergy Asthma Respir Dis 2017;5:336-343)
육미지황탕증(六味地黃湯證)의 병인론(病因論)적 분석을 위한 설문문항(說問問項) 개발(開發)
조상원 ( Sang-won Cho ),박영재 ( Young-jae Park ),김민용 ( Min-yong Kim ),오환섭 ( Hwan-sup Oh ),박영배 ( Young-bae Park ) 대한한의진단학회 2008 大韓韓醫診斷學會誌 Vol.12 No.2
Background: Yukmijiwhang-tang is one of the most common herbal formulas in Oriental Medicine. Yukmijiwhang-tang has been widely used as a herbal medicine to replenish Yin and tonify the kidneys for hundred years in Asian countries. Because of insufficiency in data, objective judgements about remedial effects have been difficult. In order to make objectivity diagnostic data, this research is developed. Purpose: The aim of the research is to make a pilot questionnaire for clinical use of Yukmijiwhang-tang. Methods: The questionnaire which includes symptoms and signs for Yukmijiwhang-tang is studied by the Delphi method. Results: By the Delphi method and score evaluation, 30 items of the initial copy of questionnaire are chosen for the research. Conclusions: By the Delphic survey among clinicians, a reference questionnaire for Yukmijiwhang-tang applications was suggested. Further research is necessary for modification of questionnaire by statistics and certification by clinical trial. research.
사과 추출물의 구취억제효과에 대한 Polyphenol Oxidase의 영향
조상원(Sang-Won Cho),곽기석(Ki-Suk Kwak),이주항(Joo-Hang Lee),윤영수(Young-Soo Yun),구연숙(Yeun-Suk Gu),지청일(Cheong-Il Ji),이두석(Doo-Seog Lee),이양봉(Yang-Bong Lee),김선봉(Seon-Bong Kim) 한국식품영양과학회 2001 한국식품영양과학회지 Vol.30 No.6
본 연구는 사과의 구취억제인자를 구명하기 위한 기초자료로써 사과 추출물의 획분에 따른 사과에서 추출한 PPO의 methyl mercaptan에 대한 구취억제활성을 조사하였다. 사과를 착즙하여 구취억제활성을 측정해 본 결과, 사과 고형분의 농도가 증가함에 따라 구취억제활성이 증가하는 경향을 나타내었다. 사과의 저분자획분에 PPO를 첨가한 경우, 저분자획분의 농도증가 및 반응시간에 따른 methyl mercaptan에 대한 구취억제활성이 증가하는 경향을 나타내었다. 이상의 결과는 사과에서 추출한 PPO에 의한 갈변반응의 중간체로 생성되는 o-quinone이 methyl mercaptan과 결합하여 methyl mercaptan을 비휘발성으로 전환시켜 구취억제활성을 나타내는 것으로 생각된다. Deodorizing activity of polyphenol oxidase (PPO) extracted from apples was investigated by measuring the changes of methyl mercaptan as an indicator of halitosis in human mouths. In the studies of apple extracts on deodorizing activity, the deodorizing activity was increased with the amount of apple extracts. In the cases of adding PPO to the low molecular fraction of apple extracts, the deodorizing activities were increased with the amount of the low molecular fraction of apple extracts and the reaction time of the extracts with PPO. Deodorizing activities of PPO is thought that o-quinone as an intermidiate produced by an oxidative reaction of PPO during enzymatic browning reactions may react with methyl mercaptan to form a non-volatile and sulfur-containing compound.
고온용융 열분해를 위한 도시 고형폐기물의 쓰레기 특성과 압축에 관한 연구
조상원(Sang Won Cho),오광중(Kwang Joong Oh) 한국환경보건학회 1999 한국환경보건학회지 Vol.25 No.1
In Korea, most of M.S.W. is disposed by landfill. But, it is limited because of problems as small land, leachate, odor etc. And, direction combustion has some problems like secondary air pollution. In comparison with landfill and direction combustion, Thermoselect Process should have solved these problems. The experimental results were as follows ; The heating value of M.S.W in this study was 1,543 kcal/kg. And, according to the compression of M.S.W., moisture contents reduced from 75% compression ratio and the maintenance of compressed shape was possible from 80% compression ratio.
육미지황탕증(六味地黃湯證) 변증설문지(辨證設問紙)의 신뢰도(信賴度) 타당도(妥當度) 연구(硏究)
조상원 ( Sang-won Cho ),박영재 ( Young-jae Park ),박영배 ( Young-bae Park ),김민용 ( Min-yong Kim ),이상철 ( Sang-chul Lee ) 대한한의진단학회 2009 大韓韓醫診斷學會誌 Vol.13 No.1
Background and purpose : We previously developed questionnaire of Yukmijiwhang-tang symptom on the Delphi method. But developed a questionnaire was not verified in the clinical. So, to ensure objectivity, quantification and validity, verification is needed for questionnaire items before applying a clinical. On this study, we looked at whether questionnaire items had been validity in the clinical. Methods : The previously developed questionnaire of Yukmijiwhang-tang symptom was applied to 200 patients who visited 12 local oriental medicine clinics. Item data were analyzed by factor analysis and reliability test. Results : The developed questionnaire showed remarkable reliability.(Cronbach`s α=0.869) In factor analysis, items were clustered to 6 factors. Conclusions : The results of this study indicate that the developed quetionnaire is reliable and valid for Yukmijiwhang-tang symptom. It can be used to evaluate Yukmijiwhang-tang symptom objectively.