단무지 공장에서 발생한 질식 사고의 원인과 방사선학적 소견: 중례보고 및 가스분석 결과

박충기,김만구,김흥철,안범규,박만수,황우철,최철순,강익원 江原大學校 附設 環境硏究所 1994 環境硏究 Vol.11 No.-

목 적:단무지 공장에서 질식사고를 일으켰던 가스의 종류를 알아내고, 이러한 가스중독의 방서선학적 소견을 소개하기 위하여 본 연구를 하였다. 대상 및 방법:단무지 공장에서 발생한 질식 사고자 3예중 생존자 1예를 대상으로 단순흥부X-선검사와 CT 소견을 분석하였으며, 가스의 종류를 알아내기 위하여 단무지를 유리병에 넣어 발생된 가스를 가스크로마토그래픽을 이용하여 분석하였다. 결 과:단무지 공장에서 발생한 질식사고자중 생존한 1명의 방사선학적 검사에서 신속히 호전되는 폐경결(consolidation)을 볼 수 있었으며 이는 폐부종의 소견임을 알 수 있었다. 협기성 상태에서 단무지를 담은 유리병의 상층부 가스를 실험 분석한 결과 이산화탄소, 에칠알코올이 다량으로 검출되었으나 독성가스는 주로 황화수소이였다. 결 론:단무지 공장의 질식 사고자에서 폐방사선학적 소견은 폐경결을 보이는 폐부증으로서 이는 실험을 통해 단무지에서 발생되는 유독가스인 황화수소 때문임을 입증하였다. Purpose: To identify the main toxic gas released from salted radish in rice bran(Dan-M-Ji) and to introduce the radiological findings of the patient who was exposed to the gas. Materials and Methods: Chest radiographs and CT scans of one survivor among three men who were exposed to the gas from Dan-Mu-Ji were reviewed. Gas obtained from the closed bottle containing Dan-Mu-Ji was analized by using the gas chromatography. Results: The radiographlc examinations of the survivor were suggestive of pulmonary edema with it's rapidly improving consolidations in both lung. The headapace gas within the bottle containing Dan-Mu-Ji was mainly composed with carbon dioxide, ethyl alcohol and hydrogen sulfide, of which hydrogen sulfide was considered the main toxic gas released. Conclusion: Under the anaerobic condition, Dan-Mu-Ji released toxic hydrogen sulfide. Inhalation of hydrogen sulfide might produce non-cardiogenic pulmonary edema.

經營意思決定을 爲한 計量分析/O.R의 接近方式과 그 適用

鄭忠泳,李東萬 慶北大學校 1979 論文集 Vol.27 No.-

Modern Management is concentrated on the decision-making theory. This paper tells about Quantitative Analysis/O.R., tools of the evaluation for decision-making whose procedure is consisted of a set of problem definition, evaluation, and selection of alternatives. Definition and feature of Quantitative Analysis/O.R and model buildings are involved in this paper and methods of Q.A/O.R are compared with scietific method, decision-making procedure and model building procedure. In addition, main models of Q.A/O.R are analyzed into objective, assumption, constraints, and formulars. Then the fields of management to which Q.A/O.R is well applied are introduced.

기능성 Zeolite-KCIO₃ 복합체에 의한 Chlorothalonil의 분해

최충렬,박만,이동훈,이병묵,이인구,최정,김장억 한국환경농학회 2004 한국환경농학회지 Vol.23 No.2

Salt occlusion in zeolite is a unique phenomenon that takes place only when the salt size is similar to the window size of host zeolite. KClO₃-occluded zeolite, as an environment-friendly oxidant, has a high potential for effective removal of various organic pollutants. This study was carried to investigate the characteristics and the removal kinetics of fungicide chlorothalonil by zeolite-KClO₃ complex. About 10% of KClO₃ was occluded in zeolite pores synthesized by salt-thermal method from fly ash, although the occlusion amount was relatively less compared to that of nitrate salts. By occlusion with KClO₃, no remarkable changes were found in X-ray diffraction patterns of cancrinite, whereas some decrease of overall peak intensities was found with those of sodalite. Different releasing kinetics of ClO^(-)₃ ion were observed in distilled water and soil solution from zeolite-KClO₃ complex. Two reactions, hydration and diffusion, seem to be related with the release of KClO₃. Therefore, the release isotherm of ClO^(-)₃ ion well fitted to the power function model which indicate the release was made by hydration and diffusion. The removal of chlorothalonil by zeolite and KClO₃ reached at reaction equilibrium within 6 hours by 18% and 47%, respectively. However, the chlorothalonil removal by the zeolite-KClO₃ complex increased slowly and steadily up to 92% in 96 hours. These findings suggested that zeolite-KClO₃ complex could be applied for effective removal of organic contaminants in the soil and aqueous environment.

시스템 成果的 次元에서의 DSS 機能에 관한 硏究

李東萬,鄭忠泳 慶北大學校 1982 論文集 Vol.33 No.-

In this paper, we'll argue the foundations of Decision Support Systems(DSS) at system performance dimension. Because its concept has not been established yet, the development process is examined in order to establish its concept, and then its definition would be able to be made. It was supposed that DSS is ideologically different from MIS in the intended object sphere of study, so we'll study its sphere and the differences between DSS and MIS, and try to make a model of DSS. DSS is studied in terms of data processing and of information value with a view to examining its fumctions and to examining how it plays a role in system improvement. Then a case-analysis in undertaking on performance improvement of data processing to make its function clrear. Inevitably, DSS concept has to be got influential along with the development of information techniques. So more continuous researches are needed on this subject.

밀폐된 복도 공간의 화재시 연기 유동에 관한연구

이만수,유홍선,김충익 중앙대학교 생산공학연구소 1999 생산공학연구소 논문집 Vol.8 No.1

본 연구에서는 화재연구분야에서 실제크기실험의 대안으로써 사용되어지는 Field model, Zone model, 축소모델실험을 복도공간내의 화재시 발생되는 연기유동에 대해서 수행하였다. 유한체적법을 이용한 Field model 에서는 새롭게 구해낸 입구조건을 이용하여 차분화 된 이산화방정식의 수렴해를 구하여 Zone model 과 이전의 실제크기실험 결과와 비교하였다. 열발생률과 특성길이를 사용하여 온도와 속도에 대한 차원해석을 통해 무차원수를 유도하여 실제실험에 대한 상사성을 확인하였다. In this study, the numerical calculation method, field model and zone model and reduced-scale experiments as the alternative to a real-scale fire test were conducted to predict the smoke movement induced by the fire in a corridor. The field model obtains temperature, folw and concentration fo smoke by using 3D unsteady finite volume method with newly given inlet boundary condition to solve the governing equations(continuity,conservation of momentum and conservation of energy) and a comparison was made with results calculated using CFAST, one of the zone model and obtained by the previous real-scale fire experiment. The laws of scaling for unsteady smoke movement were derived by dimensional analysis and scale factors involving the two dominant parameter exist. Considering many assumptions, the similarity of temperature profile and smoke movement was lamost preserved.

티타늄 표면에 대한 배양 골수세포와 치은 섬유아세포의 생체적합성

오충영,박준봉,권영혁,이만섭 慶熙大學校 齒科大學 1995 慶熙齒大論文集 Vol.17 No.2

The purpose of this study was to evaluate the response in aspect of attachment and growth rate of osteablasts and human gingival fibroblasts to the commercially pure titanium(CP titanium) and titanium alloy(Ti-6A1-4V) that are used widely as implant materials, and to obtain the basic information to ideal implant materials. In this study, commercially pure titanium in first test group, titanium alloy(Ti-6A1-4V) in second test group, cobalt-chromemolybdenum alloy(Co-Cr-Mo alloy) in positive control group, and tissue culture polystyrene plate in negative control group were used. The results of this study were as follows. 1. Bone marrow cells cultured on CP titanium and Ti-6A1-4V showed significantly greater attachment and growth rate(p<0.05) compared to Co-Cr-Mo alloy in each time. 2. There were no significant differences(p>0.05) in attachment and growth rate of bone marrow cells cultured on GP titanium and Ti-6A1-4V or tissue culture plate. 3."Most bone marrow cells cultured on CP titanium, Ti-6A1-4V and tissue culture plate were attached well to each substratum in first 2days, and then, grew at higher growth rate. On the other hand, some cells cultured on Co-Cr-Mo alloy failed to attach in first 2 days, and then, attached cells grew at lower growth rate than other groups. 4. Attachment and growth rates of gingival fibroblasts cultured on CP titanium and Ti-6A1-4V showed no significant differences(p>0.05) compared to Co-Cr-Mo alloy in 2 days, but significantly greater increase(p<0.05) in 5 and 9 days. 5. There were no significantly differences(p>0.05) between growth rates on gingival fibroblasts cultured on CP titanium, Ti-6A1-4V and tissue culture plate in 2 and 5 days, but a significant lower growth rate(p<0.05) on CP titanium and Ti-6A.1-4V versus tissue culture plate. 6. Some gingival fibroblasts cultured on all specimen groups failed to attach, but attached cells grew well especially on CP titanium, Ti-6A1-4V and tissue culture plate. 7. There were no significant differences(p>0.05) between growth rates of both bone marrow cells and gingival fibroblasts cultured on CP titanium and Ti-6A1-4V. As a result of this study, both commercially pure titanium and Ti-6AI-4V showed excellent biocompatibility and there was no significant difference in the cellular response to the both metals. Bone marrow cells cultured on each substratum showed significantly greater growth rate and responded sensitively to cytotoxic effects of metal surfaces compared to gingival fibroblasts. Considering cell response to the substrate, it was likely that the composition itself of titanium metals have no significant effects on the biocompatibility. Further study need to be done to evaluate the influence of surface characteristics on cellular responses.

만성폐쇄성 폐질환 환자에서 적혈구 항산화효소의 변화

국기용,이만재,조희충,임영국,박일,김원식,이승일,이병래 朝鮮大學校 附設 醫學硏究所 1993 The Medical Journal of Chosun University Vol.18 No.1

Toxic oxygen free radicals have been implicated as important pathologic mediators in many clinical disordesrs. Enhandng the intracellular content of antioxidant enzymes can provide means of limiting biological damage caused by oxygen free radicals. Many investigations have examined the potential of various oxyradical scavengers to modulate oxyradical injury. The oxygen free radicals play a role in the pathogenesis of chronic obstructive pulmonary disease. To investigate the pulmonary oxyradical injury and the protective role of antioxidant enzymes, author measured the amount of thiobarbituric acid reactants, the activiteies of antioxidant enzymes (superoxide dismutase, glutathione peroxidase, and catalase) and the sulfhydryl groups in serum and red blood cells from the chronic obstructive pulmonary disease groups and the normal controls. The thiobarbituric acid reactant in chronic obstructive pulmonary disease groups was increased than the controls in both serum and red blood cells, and the superoxide dismutase activity in red blood cells was no statistically difference in both groups. But, the glutathione peroxidase and catalase activities were lowered in chronic obstructive pulmonary disease groups than the controls. The sulfhydryl groups in serum and red blood cells were no statistically difference in both groups. These results suggest that the increased thiobarbituric acid reactant in chronic obstructive pulmonary disease groups mean oxygen radical toxicity, and the decreased glutathione peroxidase and catalase activities may play a role in cellular injury.

군위지역 오이 시설 재배지의 토양특성 변화

이동훈,최충렬,김광섭,김평열,서정우,박만 경북대학교 농업과학기술연구소 2006 慶北大農學誌 Vol.24 No.-

군위군 오이재배지역을 정밀토양도를 이용하며 토양특성을 조사하구 군위군 노지 및 시설오이 재배지토양의 물리화학적 특성을 조사하여, 연작과 관행적인 토양관리로 인하여 저하된 토양의 이화학적 특성을 오이재배에 적합한 토양으로 개량하기 위한 기초자료로 이용하고자 토양조사를 실시하였다. 조사지역은 군위군 군위읍 외랑리 오이재배단지로서 주요토양통은 토양토에 나타난 단북통과 신정들이 가장 넓게 분포하였으며, 점토함량은 시설재배지내 토양의 경우 양토이었으며, 시설재배지의 외부 토양의 경우 23.8%로 높게 나타났다. 오이 재배지 토양의 화학적 특성 결과에 대한 오이재배지 토양의 적정범위와비교하여 보면 일반적인 화학적 성질에서 서는 유효인산의 함량이 적정범위보다 높은 것을 알 수 있으며, 치환성 양이온 함량은 시설재배지의 외부토양은 적정범위에 속하나 시설재배지 내부토양은 모두 높은 것으로 나타났으며, 최상부 토양은 매우 높으나 l0cm이하는 깊이에 따라 뚜렷한 차이는 없었다. 오이 재배지 토양 중 중금속 함량은 모두 기준치보다 높게 나타났는데, 구리의 함량이 시설재배지가 노지재배지보다 높게 나타났다. The soils of plastic film houses in which intensive cultivation takes place suffer from the serious problems such as severe salinity and accumulation of heavy metals etc. The objective of this research was to examine the change in soil properties with repeated cucumber cultivation under plastic film house at Gunwi-Gun area. The soils were classified mainly to Danbuk and SinJung series. Clay content is lower in the soils of plastic film house than in the field soil. Available P205 and exchangeable cations were accumulated at the level higher than the optimum range. The content of extractable heavy metals were higher in the soils of plastic film house than in those of the field. For optimum yield, much attention should be paied to the management of soils by the pre-soil survey.

Capsaicin으로 유도된 신경성 염증반응에 미치는 상백피의 영향

윤창용,신동환,홍충만,이원규,장동덕,채옥희,강경진,이무삼 대한해부학회 1999 Anatomy & Cell Biology Vol.32 No.1

역상 액체 크로마토그래피에 의한 금속-N-Benzylisonitrosoacetylacetone Imine 킬레이트의 분리에 관한 연구

金仁煥,李忠壎,李萬浩 대구대학교 기초과학연구소 1989 基礎科學硏究 Vol.6 No.-

Liquid chromatographic behavior of Pd(Ⅱ) and Co(Ⅲ) in N-benzylisonitrosoacetylacetone imine(HIAA-NBz) chelates were investigated by reversed phase high performance Liquid chromatography (HPLC) on Novapak C_(18) and μ-Bondapak C_(18) Columns. The optimum conditions for the separation of the above metal chelates with respect to column, flow rate, sample solvent and mobile phase strength were determined. The metal ions chelated with HIAA-NBz were successfully separated on Novapak C_(18) Column using acetonitrile/methanol/water/(55/10/35) as mobile phase. The capacity factors(k') of Pd(Ⅱ), Co(Ⅲ)-HIAA-NBz chelates were measured as a function of the mobile phase composition. It was found that metal HIAA-NBz chelates were eluted properly in the acceptable range of capacity factor values(0≤log k'≤1) The Iinear calibration curves were obtained in the concentration range of 0∼20㎍/ml of Co(Ⅲ) and 0∼30㎍/ml of Pd(Ⅱ). The recovery and the coefficient of variation of this proposed method were obtained in the range of 101.4∼102.7% and 3.0∼6.7% respectively.