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이온화방사선 피폭에 의한 골수세포의 Ornithine Decarboxylase 활성도의 변화에 대한 전계장의 영향에 관한 실험적 연구
정문호 한국환경보건학회 1995 한국환경보건학회지 Vol.21 No.1
Ornithine decarboxylase(ODC) is an indicate enzyme in carcinogenesis. We divided Sprague Dawley rats into six groups: control, electric field exposure, X-ray only irradiation, X-ray irradiation with electric field exposure group, Sr-90 injected group and Sr-90 and electric field complex exposure group. The ODC activity was measured in rat s bone marrow cell every week. The results were summarized as follows: The ODC activitied was increased in X-ray irradiated, Sr-90 injected and Sr-90 and electric field complex exposed group as compared with that of control(p<0.05). The ODC activity was increased comparing that of control neither in X-ray and electric field complex exposed group nor electric field only exposed group. This result suggests that the electric field doesn t have myeloid carcinogenicity and myeloid cancer incidence caused by ionized radiation is suppressed by electric field exposure.
鄭文鎬,金種石 대한보건협회 1981 대한보건연구 Vol.7 No.1
The survey was conducted on 299 Government employees who were 4th or 5th grade in Gangwon Province during the months of January and February, 1981. The findings are as follows: 1. 65.6% of the persons surveyed were smoking cigarettes. 2. 77.2% of them, whose father had smoked, were smoking cigarettes. 3. Most persons who were in 26~50 years of age began smoking first time when they were between 21 and 25 years old. 4. The most favorite brand of cigarette was Geobugseon (71.4%), the second most favorite is Hansando (10.2). 5. The No. of cigarettes consumed per person a day were 6~20. 6. 49.0% of the persons had experience of quitting smoking. 7. 56.5% of them opposed the smoking habit of young persons as parent and the major reason for objection was health. 8. 80.3% of them were drinking liquor. 9. 86.3% of them, whose father had drunk, were drinking liquor. 10. Most persons who were in 21~45 years of age began drinking liquors first time when they were between 21 and 25 years old. 11. The most favorite kind and the amount drunken once was Soju 1 bottle (640ml) (13.3%) and beer 1 bottle (640ml) (9.2%) in order. 12. 68.2% of the persons were for moderate drinking because it was supposed to be good for health. 13. 55.2% of them were smoking and drinking, 3.0% smoking only, and 27.8% drinking only. 14. 18.7% of them received medical service during 6 months in 1980. 15. 27.4% of them were playing tabletennis, 27.4%, riding a bicycle and 27.4% taking medicine for maintaining health respectively. 16. 27.9% of the persons who were smoking and drinking were troblesome in human relations, and 60.0% of the persons who were neither smoking nor drinking were troblesome.
Invariants with New Indexing Functions: Application to Welding Panel Recognition
정문호,이왕헌 제어·로봇·시스템학회 2011 International Journal of Control, Automation, and Vol.9 No.1
Many lines in a typical cluttered image incur a size explosion when invariants from every combination of the extracted lines are calculated. To solve this problem, we propose a new method of reducing the search space by introducing not only a line convex hull (LCH) but also an indexing logic filter (ILF). The LCH arranges five lines in a unique order and classifies a set of five lines into topological types. The ILF produces an integer indexing key from the acquired LCHs. The LCH and ILF are incorporated into a hierarchical database so that the model features can be retrieved efficiently. We achieved satisfactory results for synthetic welding panels used in shipbuilding.
폐금속광산 중금속오염토양에서 억새를 이용한 식물안정화공법을 위한 토양개량제 선정
정문호,지원현,이진수,양인재,Jung, Mun Ho,Ji, Won Hyun,Lee, Jin Soo,Yang, In Jae 대한자원환경지질학회 2020 자원환경지질 Vol.53 No.5
본 연구는 폐금속광산의 중금속 오염 토양에서 억새를 이용한 식물안정화공법을 적용하기 위해 토양개량제 처리에 따른 토양내 중금속 이동성과 억새내 중금속 축적형태 등을 분석하여 적정 토양개량제를 선발하고자 수행하였다. 이를 위해 중금속 오염토양을 바닥재 1, 2%, 비산재 1, 2%, 폐석회+굴패각 1, 2%, AMDS 10, 20%, 퇴비 3.4% 등으로 처리하고, 비교를 위해 아무 처리를 하지 않은 대조구에 억새를 식재한 후 6개월을 재배하였다. Mehlich-3에 의한 토양내 중금속 함량, 억새 체내 중금속 이동형태 등을 분석한 결과 AMDS 20%가 식물안정화공법에 가장 효과적인 개량제로 선정되었으며, 2순위는 AMDS 10%가 선정되었다. 폐석회+굴패각, 바닥재와 비산재도 식물안정화공법적용 효과가 대조구에 비해 개선된 것으로 나타났다. 개량제 처리에 따라 일부 중금속의 토양내 유동성이 증가하는 결과를 보여, 실제 사업 적용을 위해 사전에 대상지역의 토양오염 특성을 분석하여 현장특성에 적합하게 토양개량제를 선정해야 할 것으로 사료된다. The objectives of this study were to select optimal soil amendments through analysis of heavy metal availability in soil and uptake to Miscanthus sinensis Anderss. for phytostablization in heavy metal contaminated soil of abandoned metal mine. M. sinensis was cultivated for 6 months at contaminated soil with several soil treatments (bottom ash 1 and 2%, fly ash 1 and 2%, waste lime+oyster 1 and 2%, acid mine drainage sludge (AMDS) 10 and 20%, compost 3.4%, and control). The analysis results of heavy metal concentrations in the soil by Mehlich-3 mehthod, growth and heavy metal concentrations of M. sinensis showed that AMDS 20% was more effective than other amendments for phytostablization, and AMDS 10% showed second effectiveness. Waste lime+oyster, bottom ash and fly ash were also improved compared to control. Mobility of some heavy metal was increased by treatments. Therefore, it is necessary of preparatory investigation of soil condition to select soil amendment to apply on-site phytostablization.