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Co^(60) 全身照射가 피부조직비반세포에 미치는 影響에 關한 實驗的硏究
韓鎭慶 고려대학교 의과대학 1966 고려대 의대 잡지 Vol.3 No.1
With the recent advance in nuclear medicine, radioactive isotope Co^(60) is playing an important role in the treatment of malignant tumor. The present study is to investigate the distribution of tissue mast cells (TMC) of mice skin under the influence of whole body irradition by Co^(60) and cortisone injection. In the control animals, the distribution of TMC was observed at the scalp, cheek, ear, abdomen, back, forelimb, hindlimb, foot sole and tail of infant and adult mice. In the cortisone treated animals, 2.5 gm of saline suspension of cortisone acetate was injected into the adult mice on two consecutive days, and the TMC were counted from the scalp at intervals of 30 minutes, 3-, 12-, 24-, 48-, 72-hours, I week, 2-and 3-weeks following injection. The irradiation animals were divided into two subgroups; one was irradiated 500 R or 1000 R without any pretreatment, the other was irradiated by the same doses with cortisone pretreatment, and then the TMC were observed at the same intervals as mentioned above. Cell count was done at fields of 4 mm square under 400 magnification foilowing toluidine blue staining. The results were as follows: 1. In the infant mice, the number of TMC was the highest in the scalp among the observed areas, and there was no appreciable difference between two sexes. 2. In the adult mice, similar results were obtained. The next in order was the skin of cheek and ear. 3. Generally the number of TMC in the adult mice was about 50% more than that of the infant. 4. In the cortisone treated animals, the number of TMC decreased at 30 minutes following injection, reaching the lowest at 12 hours, and it began to rise thereafter gradually, reaching the normal value in 2 weeks. 5. In the 500 R irradiated animals, the number of TMC decreased at 12 hours, reaching the lowest at 24 hours and resuming to the normal value in 3 weeks. In the animals which cortisone injection and 500 R irradiation were done, the decrease of TMC number was significantly inhibited, and the recovery of the cells was faster as the normal value was obtained in a week. 6. In the 1000 R irradiated animals, the number of TMC decreased at 30 minutes, reaching the lowest at 12 hours, resuming to the normal value in 3 weeks. In the animals which cortisone injection and 1000 R irradiation were done, the number of TMC was recovered to the normal value in 2 weeks, and its decrease was significantly inhibited than in the simple irradiated animals. These 1000 R irradiated animals showed more marked decrease in the TMC number than that of the 500 R irradiated animals. 7. When the total number of TMC decreased, the normal typed cells decreased, while the diffuse typed increased; when the number increased, the opposite was ture. 8. The decrease of TMC, induced by Co^(60) irradiation, were alleviated in the cortisone treated animals.
베트남 짜봉(Trabong) 지역의 열수 금 광화작용 : 광물 및 지화학적 연구
한진경 대한자원환경지질학회 1999 자원환경지질 Vol.32 No.2
베트남 짜봉 지역의 열수 금광상은 단일 광화 시기의 석영$\pm$방해석 맥으로 산출되며, 원생대의 Chulai Complex와 Kham Duc Formation을 이루는 ga 흑연 편마암 및 편암 내의 단층 열극을 충진하고 있다. 광석의 금 품위는 1.3~92.4g/ton 이다. 광석 광물은 매우 단순하여 주로 황철석 및 미량의 base-metal 황화물과 에렉트럼으로 구성된다. 금은 다음과 같은 두 유형의 공생군에서 산출된다. :1) 함철량이 풍부함 섬아연석+엘렉트럼 공생군으로서 황철석 내의 내포물로 산출되며 초기에 해당;2) 함철량이 낮은 섬아연석+방연석+엘렉트럼 공생군으로서 황철석의 단열을 따라 산출되며 후기에 해당. 유체포유물자료 및 공생광물군에 대한 열역학적 고찰에 의하면, 광화작용은 H\sub 2\O-CO\sub2\(-CH\sub 4\)-NaCl 계 유체로부터 230~42$0^{\circ}C$의 고온에서 진행되었으며 광화 유체의 황 분압은 10\sup -6\-10\sup -10\atm 이었다. 광석 광물의 침전은 주로 CO\sub 2\ 개스의 일탈을 수반한 유체 불혼화에 의해 진행되었다. 광화 유체 중 물의 산소 및 수소 동위원소 조성과 황화광물의 황 도위 원소 조성 및 유체포유물 CO\sub 2\ 의 탄소 동위원소 조성은 본 연구 지역의 중-고온형 금 광화작용이 마그마성 유체로부터 진행되었음을 지시한다. Hydrothermal gold deposits of the Trabong district in Vietnam occur as single-stage quartz $\pm$ calcite veins (0.3-1.2 m thick) which fill fault fractures in graphite-bearing gneiss and schist of the Chulai Complex and Kham Duc Formation of the Proterozoic age. Ore grades are 1.3 to 92.4 g/ton Au. Ore mineralogy is very simple, consisting mainly of pyrite with minor amounts of base-metal sulfides and electrum. Gold grains occur in two assemblages as follows: (1) early, Fe-rich (7.2-10.4 mole % FeS) sphalerite + electrum (50.4-64.3 atom % Au) assemblage occurring as inclusions in pyrite; (2) late, Fe-poor «4.7 mole % FeS) sphalerite + galena + electrum (47.6-81.7 atom % Au) assemblage occurring along fractures of pyrites. Based on fluid inclusion data and thermochemical considerations of ore mineral assemblages, ore minerals were formed at high temperatures (about $230^{\circ}C$ to $420^{\circ}C$) from $H_{2}O-CO_{2}(-CH_{4})$-NaCI fluids with the sulfur fugacity of about $10^{-6}$ to $10^{-10}$ atm. Fluid inclusion data also indicate that ore mineralization occurred mainly as a result of fluid unmixing accompanying $CO_2$ effervescence. Calculated oxygen and measured hydrogen isotope compositions of mineralizing waters (${\delta}^{18}O_{V-SMOW}$ values = 5.3 to 8.6$\textperthousand$, ${\delta}D_{V-SMOW}$ values = - 60 to - 52$\textperthousand$), along with the sulfur isotope compositions of vein sulfides (${\delta}^{34}S_{CDR}$ values = - 1.2 to 2.8$\textperthousand$) and carbon isotope compositions of inclusion $CO_2$ (${\delta}^{13}C_{PDB}$ values = - 4.7 to - 2.0$\textperthousand$) indicate that the high temperature (mesohypothermal) gold mineralization formed from a magmatic fluid.