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임채규,박경수,김홍섭,노영복 조선대학교 기초과학연구소 1988 自然科學硏究 Vol.11 No.1
This experiment was conducted to fine out the rapid composting method and the effects microorganism agent. The results were summarilized as follows; 1. Each temperatures of every composts highest rised at the 5 days during the experiment composting. 2. Composting temperature of the more 60℃ was killed the harmful lavar and pathogenic microorganisms. 3. The lowest C/N ratio was No.2, among the each treatments. 4. C/N ratio of the each treatments were same results of the general compost C/N ratio. 5. The synthesized of these results were recognized the effects of microorganism agent and the each treatments were showed the more rapid composting then general compost.
Chae, Young-Bae,Joeng, Soo-Bok,Koh, Won-Sik,Park, Je-Shin,Yang, Shi-Young 한국자원리싸이클링학회 1996 資源 리싸이클링 Vol.5 No.4
유용광물의 유실과 자연환경 훼손의 원인이 되는 석회석 광산 폐석을 자체 제작한 회전식 스크린 선별기를 이용하여 시멘트 제조용 원료로의 재활용방법의 개발을 시도하였다. 자체 제작한 회전식 선별기의 분리 조작에서는 시료의 수분함유량 6wt%이하, 시료의 선별기내 체류시간 15sec, 선별기의 회전수 600rpm의 조건에서 분리된 조대산물중의 CaO 품위는 37.36wt%에서 $42pm$2wt%로 상승하였다. 따라서, 광범위한 입도범위(수십Cm에서 1.0mm까지)를 가지는 시료를 효과적으로 분리 회수하기 위한 분리 공정을 수립하여 실험한 결과 분리된 조대산물중의 CaO 품위는 46.85wt%까지 상승하였다. 이 결과는 시멘트 제조용 원료로서 직접사용품위에는 불충분하지만 광산에서 폐석중의 dolomite의 선별이 가능하므로 직접 재활용이 가능할 것으로 추측된다. 한편 분리된 미립산물(점토류, 20mm이하)등은 전 공정에 걸쳐 안정적인 화학조성을 유지하고 있기 때문에 시멘트 제조용 부원료로서 직접 재활용이 가능할 것으로 판단된다. The wastes ot l~mestone mines have been cause the extrar.ngance of the valuablz m e r a l s and destruction of the environment. Therefore, \\-c tied ta separation of calcite illid clay from the limestone mine wastes by rotntmg screen type separator made by ourselves in order to recyding such us a raw matcriala for cement maimfacture. CaO amtents in the separated coarse products increased from 37.36 wt% to 42+2 wt% at the condition ihat water content in wastes was lzss than 6wt%, the passing time of specimen in &amber was 15 semnds and the rotation speed was 6OLl qm. A process in order lo separate wastes effectively to having wide range aI part~dcs ize was cstablishcd and CaO contents of coarsc products through this process increased to 46.85 wt%. Tbis rcsult is insuEiicient to directly rcusing as a raw malerials for cement. However, it is supposed that coarse products would be able to be reuscd as a raw materials uf cement, if only it rs sclected dolomite in wastes, and really it may be possible in fields Othenvise, undcrsize products(less than 20 mm) would be able to recycling as a raw of cement bccause chcmicrl campasitions of thosc is kept almost constant v&cs on the overall process.
P096 : A study of the results of patch test: the 5-year experience of 2009-2014
( Young Bok Lee ),( Hyun Jee Kim ),( Hye Rim Ko ),( So Min Kim ),( Chae Young Won ),( Hyung Jin Hahn ),( Jin Wou Kim ),( Dong Soo Yu ) 대한피부과학회 2014 대한피부과학회 학술발표대회집 Vol.66 No.2
Background: Allergic contact dermatitis is a hypersensitivity reaction to a sensitized allergen. The first step in diagnosing allergic contact dermatitis would be a careful history taking, but to identify the cause of allergic contact dermatitis, patch test is an essential method. However, there has been no recent study regarding the results of patch test in Korea. Objectives: The purpose of this study was to analyze the type, frequency of the common contact allergens in Korea. Methods: From June, 2009 to June, 2014, 330 patients with suspected contact dermatitis who visited our clinic were tested with 25 different allergens. Patient’s demographic findings and patch test results were evaluated. Patch test reading was performed after 48 hours. Results: A total of 330 patch tested cases were analyzed. The highest age distribution was 3rd decade in males and 5th decade in females. The most common affected sites were hands(31%), trunk(24%), and arms(22%) in male, but in female, the face, including eye, ear and lip, was the most frequently affected site comprising 51.7%. The next common sites in female were trunk(19.6%) and hands(17.4%), in order of frequency. In patients with strong or extreme positive reactions, the highest sensitization rates were found with: nickel sulfate(27.9%), cobalt chloride(14.2%), 4-phenylenediamine(9.2%), respectively. Conclusion: These results provide the basis for the presumption of the route of allergen exposure and prevention of contact dermatitis in Korea.
Lee, Young Bok,Kim, Su Young,Park, Yong Gyu,Han, Kyung Do,Kim, Jin-Wou,Chae, Hiun Suk,Lee, Young Chun Williams & Wilkins Co 2017 Medicine Vol.96 No.11
<P><B>Abstract</B></P><P>Pterygium is a common conjunctival disorder. The socioeconomic risk factors of pterygium have not been systematically evaluated in Korea. The study investigated risk factors of pterygium considering socioeconomic status.</P><P>Participants were 9839 adults aged 19 to 74 years, who underwent ophthalmic slit-lamp examinations as part of the Korean National Health and Nutrition Examination Survey 2010 to 2011. Pterygium was diagnosed as a growth of fibrovascular tissue over the cornea. The socioeconomic risk factors were analyzed in association with the presence of pterygium. Multiple logistic regression analysis was used to evaluate the odds ratios for differences in socioeconomic status.</P><P>The presence of pterygium was associated with diabetes mellitus, hypertension, metabolic syndrome, and sun exposure time (>5 h/d). The blood level of 25-hydroxyvitamin D was higher in the pterygium group than in the control group, but both groups were deficient in 25-hydroxyvitamin D compared with the normal reference level. Pterygium was almost 3 times as frequent among persons who worked outdoors, such as skilled agricultural, forestry, and fishery workers, than among those who worked indoors (odds ratio 3.061, 95% confidence interval 1.946–4.813). Low educational status and longer working hours were also significantly associated with pterygium.</P><P>This study used a nationwide population-based survey conducted by the Korean Centers for Disease Control and Prevention to reveal that pterygium is associated with low socioeconomic status. Efforts should be made to reduce the risk of pterygium by changing modifiable risk factors, especially among people with low socioeconomic status.</P>
전남 홍도를 통과하는 벌매(Pernis ptilorhynchus)의 이동 양상
최영복 ( Young Bok Choi ),채희영 ( Hee Young Chae ),김성현 ( Sung Hyun Kim ) 한국환경생태학회 2009 한국환경생태학회지 Vol.23 No.1
본 연구는 2005년 9월부터 2007년 10월까지 3년간 봄과 가을에 전남 홍도를 통과하는 벌매(Pernis ptilorynchus)의 이동 규모를 조사함으로써, 기상에 따른 이동의 영향을 분석하고, 벌매의 이동생태에 대한 특성을 파악하기 위하여 실시되었다. 홍도에서 기록되어진 벌매의 개체수를 살펴보면 2005년 702개체, 2006년 404개체, 2007년 659개체로 나타났고, 이중 봄철에 관찰된 개체수는 2006년 2개체, 2007년 8개체에 불과하여 홍도는 벌매의 가을철 이동경로 상에 존재하는 것으로 나타났다. 또한 9월 20일에서 10월 5일 사이에 많은 이동이 확인 되었다. 벌매는 2007년 가을 시간대별로 조사된 538개체의 벌매 중에서는 216개체(40.1%)가 오전 7시에서 8시 사이에 이동을 하는 것으로 나타났다. 이동시 풍향 선호도는 이동 방향의 오른쪽 뒤쪽에서 불어오는 북서풍을 선호하는 것으로 나타났으며, 풍속이 5m/s 미만일 때 벌매의 이동이 더 활발하였지만, 5m/s 이상의 강한 바람일 경우에는 이동의 수가 감소하였다. 따라서 풍속과 풍향은 벌매의 이동에 있어서 중요한 영향을 주는 요소라고 판단된다. 한반도의 벌매 이동경로를 파악하기 위해서는 각 지역별로 지속적인 이동 개체군의 규모 파악이 선행되어야 할 것이며, 특히 자료 부족으로 인하여 국내 가을철 이동 집단의 이동경로를 예측하기 어렵기 때문에 향후 국내 위성추적을 통한 이동경로 연구가 병행되어야 할 것으로 판단된다. To understand the status of the migrating Oriental Honey Buzzard (Pernis ptilorynchus) in Korea, we carried out a preliminary study on the number and local movements of the Honey Buzzard from September 2005 to October 2007 at Hongdo Island, Jeonnam Province, Korea. A total of 702 Honey Buzzards in 2005, 404 individuals in 2006, and 659 individuals in 2007 were recorded during the fall migration season, but during the spring migration season only two and eight birds were observed in 2006 and 2007 respectively. The migrating Honey Buzzard showed peak numbers from 20 September to 5 October at the study site. According to observation of arrival time of 538 Honey Buzzard in October 2007, a total of 216 birds(40.1%) were passing over Hongdo Island between 7:00 AM to 8:00 AM, rising skyward on columns of warm air. This suggests the use of thermal currents and avoidance of nocturnal movement for crossing water. They preferred moderate winds(<5 m/s in speed) from northwest, but the migrating number apparently decreased in case of strong winds (≥5 m/s). This suggests that wind speed and direction are important environmental factors for migration of the Oriental Honey Buzzard. At present, it is unclear which breeding population (from north-eastern China or Japan) passes over Hongdo Island. Moreover, it is difficult to prove migration route and to understand migratory behaviors of the Oriental Honey Buzzard in Korea. To prove the breeding sites and routes of the migrants over the study site, we need more detailed and further studies such as satellite tracking researches.