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분리대두단백 첨가에 의한 쌀 압출성형물의 물리화학적 특성 변화
이찬,Lee, Chan 한국식품영양학회 2010 韓國食品營養學會誌 Vol.23 No.1
The effects of isolated soy protein(ISP) content on the physicochemical properties of extrudates from rice flour produced by a single-screw extruder were evaluated. The integrity index(II), nitrogen solubility index(NSI), rehydration ratio(RR), and density were measured as indices of the changes of physicochemical properties of rice extrudates. Increased amounts of ISP resulted in increased II but decreased RR and density. There was no change in the NSI value. It was concluded that the addition of ISP to the raw material could be helpful in texturization of rice extrudate.
중발열량 석탄 가스를 사용하는 복합발전 사이클의 성능 및 NOx 배출 특성
이찬,윤용승,Lee, Chan,Yun, Yong-Seong 한국에너지학회 2000 에너지공학 Vol.9 No.4
증발열량 석탄가스 연료를 사용하는 석탄가스와 복합 발전 플랜트의 성능 및 NOx 배출량을 동시에 예측하기 위한 모사 방법을 제시하였다. 본 방법은 복합 사이클의 열역학적 해석 기법을 토대로, 석탄가스화 복합발전 플랜트의 시스템 연계 및 석탄가스 연소에 의한 탈설계점 효과를 예측하는 모델들을 포함하고 있다. 본 방법에 의한 전산 모사 결과와 천연가스를 사용하는 복합발전소의 실제 시험 결과를 비교함으로써, 본 방법의 예측정확도를 검증하였다. 본 모사 방법을 이용하여, 서로 다른 4가지 석탄가스 연료에 대해, 공기 분리장치와의 다양한 연계 설계 조건에 따른 석탄가스화 복합발전 플랜트의 전체 성능, 운전 안전성 및 NOx 배출 특성들을 비교, 검토하였다.
Nitrous Oxide - Oxygen 의 장기노출이 백서 혈구세포에 미치는 영향에 관한 실험적 연구
이찬일(Chan Il Lee) 대한악안면성형재건외과학회 1984 Maxillofacial Plastic Reconstructive Surgery Vol.6 No.1
N/A The purpose of this study was to observe hematologic alterations following prolonged inhalation of the nitrous oxide-oxygen in rats. For this study, 56rats weighing an average of 150gm were selected and devided into control and experimental groups. The experimental groups were then categorized as fallows: 1. 20 percent nitrous oxide-80 percent oxygen group. 2. 50 percent nitrous oxide-50 percent oxygen group. 3. 70 percent nitrous oxide-30 percent oxygen group. The experimental groups were exposed within closed chamber to an atmosphere of above concentrations at a flow of 2L.fminute for either 8 hours (Intermittent group) or 24 hours (Continuous group) daily for various period. Carbon dioxide was absorbed by soda 1ime. Whenever the chamber was opened for addition of food and water or removal of animals the inflow rate of nitrous oxide-oxygen was increased m 10L./minute for 5 minutes, At the 1st, 3rd, 6th, and 7th days, experimental groups were sacrificed by giving Ketamine HCL of 1mg/100gm of body weight with intramuscular injection. When the animals anesthetized, the thoraces were opened and blood samples were drawn into a 5ml disposable syringe from the heart then placed in a bottle containing E.D.T.A. This blood samples were used for counts of red blood cell, white blood cell, hematocrit, hemoglobin, and used to make a smear for white blood cell differential counts and studies. These counts were immediately performed en the sacrificed time. The red blood cell and white blood cell counts were made by standard method and the differential leukocyte counts were conducted by examination of blood films stained with Wrights stain. The hemoglobin concentration was determined with Corning 950 Hemoglobinmeter (Corning Co., U.S.A.) and the hematocrit value was determined by the method of capillary hematocrit. The mean corpusclar volume (M.C.V.), mean corpuscular hemoglobin (M.C.H.), and mean corpuscular hemoglobin concentration (M.C.H.C.) were calculated by the method of Wintrobe. The following results were obtained: 1. The significant eviedence of leukopoietic depression was found on the 5th and 7th days of continuous exposure groups to 50%, 70% nitrous oxide. (0.82±0.18 -2.65±0.15 10(3)/Cu, mm., p<0.01) 2. Red blood cell counts were within normal limits. 3. Hemoglobin concentration suggested a significant decrease on the 7th day dxperimental groups. (10.5±0.2 -11.6±Omg/100ml., p<0.01) 4. Hematocrit values suggested a significant decrease on the 3rd, 5th and 7th days of continuous exposure to 70% nitrous oxide. (29.0±1.0 -31.25±0.5%, p< 0.01) 5. Mean corpuscular volume (M.C.V.) values suggested a significant decrease on the 5th and 7th days of all experimental groups. (39.6±1.29 -52.78±2.46 Cu. μ., p<0.01) 6. Mean corpuscular hemoglobin (M.C.H.) values suggested a significant decrease on the 1st, 7th days of continuous exposure groups to 20%, 50% nitrous oxide. (13.13±0.05 -16.61±0.2 μμg., p<0.01) 7. The significant evidence of neutropenia was found on the 3rd day to 20% continuous, 70% intermittent exposure groups and the 5th, 7th days all experimental groups. (0-8.75± 5.29%. p<0.01) 8. Lymphocytes were relatively resistant to nitrous oxide in the all experimental groups.
저 발열량 석탄가스 연료의 화염 안정성 및 NOx 발생 특성에 관한 실험적 연구
이찬,김용철,Lee, Chan,Kim, Yong-Chul 한국에너지학회 2000 에너지공학 Vol.9 No.2
저발열량 석탄가스의 thermal/fuel NOx 생성특성과 화염 안정성을 규명하기 위한 실험적 연구를 수행하였다. 저발열량 합성 연료 가스는 일산화탄소, 수소, 질소 및 암모니아를 천연가스 연료와 동일한 입열량을 가지도록 혼합하여 만들었고 , 합성가스는 평면 화염 버너를 공급하여 태웠다. 특정한 합성가스에 대해 당량비를 변화시켜 가며, 비화 또는 역화에 의한 화염안정성을 규명하였고 안정된 화염 영역을 정의하였다. 저발열향 합성가스의 연소시 발생하는 thermal 및 fuel NOx를 측정하여 천연가스 연소시의 경우와 비교하였다.
이찬,정명균,Lee, Chan,Chung, Myung-Kyoon 대한기계학회 1991 대한기계학회논문집 Vol.15 No.1
본 연구에서는 로켓노즐로 부터 분출되는 고온의 초음속제트가 45˚로 경사진 평판으로 분사되는 경우의 열전달을 측정하였다.고온의 제트가 충돌하는 평판표면 의 고온과 열유속을 측정하는 것이 거의 불가능하므로, 국소적열전달은 국소적 준 1차 원 열전도모형을 평판표면 아래에서 측정한 온도자료에 적용하여 구하였다. An experiment was conducted to determine the local heat transfer from a supersonic hot jet impinging at 45.deg. to a plate surface. A semi-analytic method was used to determine the Nusselt number from experimental data. The results indicates that the location of the peak heat transfer is displaced from the geometric center of the axisymmetric jet and that the radial variation of the local heat transfer is steeper than that in the subsonic impinging jet. In the stagnation region, the heat transfer from the supersonic impinging jet is about 10 times larger than that from the subsonic one, while the heat transer away from the stagnation region is of the same magnitude as that of the in compressible turbulent radial wall jet.
이찬,성형진,권장혁,정명균,Lee, Chan,Sung, Hyung-Jin,Kwon, Jang-Hyuk,Chung, Myung-Kyoon 대한기계학회 1991 대한기계학회논문집 Vol.15 No.2
A performance of a regenerative pump has been analyzed using various pressure loss correlations. The predicted head and efficiency agree favorably with experimental data, which confirms the validity of the present analysis. In addition, performance improvement is made through the optimization of the open channel geometry configuration and the capacity of the regenerative pump. The optimized pump has better efficiency, higher head and larger flow coefficient. Moreover, its operation range is wider than that of the conventional unit.