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산업용 알루미늄 가공시 발생하는 분말의 자연발화 가능성에 관한 연구
한재철,정동혁 한국화재감식학회 2021 한국화재감식학회 학회지 Vol.12 No.3
The use of combustible metals in products in various industries such as automobiles is increasing significantly as the rare metal industry has recently developed and the industrial structure has shifted to a high-tech industry. Several fires, presumed to be spontaneous combustion, occurred at an automobile parts processing company in our area. Although it is known that combustible solids do not spontaneously ignite, this study was conducted to technically analyze and suggest the possibility of spontaneous ignition of mixtures generated during metal processing.
견적혈구(犬赤血球)에 감염(感染)된 Babesia gibsoni의 미세구조(微細構造)에 관한 연구(硏究)
한재철,이주묵,채준석,윤창모,Han, Jae-Cheol,Lee, Joo-Muk,Chae, Joon-Seok,Yoon, Chang-Mo 대한수의학회 1991 大韓獸醫學會誌 Vol.31 No.1
For the ultrastructural observation on Babesia gibsoni(B gibsoni), the protozoa were challenged experimentally to splectomized dog. To examine the ultrastructure of the B gibsoni in the erythrocyte, the infected erythrocytes were collected at the cephalic or jugular vein of the dog. The results obtained by TEM(transmission electron microscopy) were as follows; 1. The sizes of protozoa in erythrocytes are $0.92{\pm}0.36{\mu}m{\times}0.67{\pm}0.21{\mu}m$, the sizes of nucleus of the protozoa are $0.55{\pm}0.24{\mu}m{\times}0.38{\pm}0.26{\mu}m$, and sizes of rhoptries in plasma of the protozoa are $0.33{\pm}0.05{\mu}m{\times}0.25{\pm}0.07{\mu}m$, respectively. 2. The tropozoite membrane in the erythrocyte was one, and it's nuclear membrane was made up of double. But the protozoa of initial stage in infected erythrocyte had double clear mambranes, and distinguished from plasma membrane of red blood cell. 3. The mitochondrialike structures covered with two membranes were observed in the protozoa. 4. Mitochondria and vesicles of the reticulocyte were observed near protozoa in the erythrocyte. 5. There are rhoptry, coiled structure and single nucleous in the merozoite. 6. The shape of rhoptry was round or ovoid form and in occasionally, the content of rhoptry was lost partially. 7. There was able to observe the dividing process of the protozoa. 8. Maurer's cleft-like structure was observed.