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간 흡충의 영양물 섭취에 관한 연구 특히 숙주 적혈구 섭취, 소화 및 흡수 과정에 eogku
김장우 現代醫學社 1968 現代醫學 Vol.9 No.1
Experimental studies were carried out to observe the intestinal contents and the distribution of `hemoglobin and visible iron in Clonorchis sinensis. The worms were obtained from the rabbits artificially infected with metacercariae of Clonorchis sinensis. The author also observed hemoglobin consumption of the worm in vitro, and intake of rabbit red blood cells by the worm autoradiographically. The experimental results were discussed .and the following conclusions were obtained. 1. Clonorchis sinensis takes up the host red blood cells by the oral sucker. The red blood cells are transfered through the esophagus to the intestinal canal. Within the canal they are destroyed and their contents are liberated. 2. Clonorchis sinensis utilizes hemoglobin as a nutrient. A part of the hemoglobin is absorbed in the wall of the digestive tract, but it cannot go into the deep tissues beyond the digestive tract. 3. The intestinal wall as well as the intestinal contents reveals significant . amounts of visible iron, while the subcuticular layer, reticular tissues and reproductive organs show traces of this mineral. The author would like to state on the basis of the above that a part of visible iron originated from the hemoglobin is absorbed through the intestine and is stored in some tissues of the worm and the excessive iron produced in the intestinal canal seems to be carried backward to excrete through the oral sucker.
축소-확대 유로에서의 가열에 의한 비정상 유동의 특성에 관한 연구
김장우,정진도,Kim, Jang-Woo,Chung, Jin-Do 대한기계학회 2002 大韓機械學會論文集B Vol.26 No.6
This Paper presents numerical solutions of two-dimensional Euler equations for supersonic steady and unsteady flows with heat addition in a convergent-divergent duct, The Van Leer FVS (flux vector splitting) method in generalized coordinates is employed in order to calculate the inviscid strong shock waves caused by thermal choking. We discuss on transient characteristics, start and unstart phenomena caused by thermal choking, limit of equivalence ratio to avoid thermal choking and fluctuation of specific thrust caused by thermal choking. We prove that thermal choking is a serious problem in view of engine performance.