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이미지 분석법을 이용한 소프트 콘택트렌즈용 다목적용액의각막상피세포 독성 평가
김남열,이군자 한국안광학회 2015 한국안광학회지 Vol.20 No.1
Purpose: To determine the effect of marketed multipurpose contact lens solutions (MPSs) on human cornealepithelial cells (HCEpiCs) toxicity by using image analysis. Methods: HCEpiCs were exposed six MPSs (productA-F) at 0.05~50% for 2h, 12h, 24h, and 48h respectively. HCEpiCs were fixed and stained with Draq5 afterexposure with MPSs, and the cell viability and apoptosis were evaluated by using confocal microscope andImageXpress UltraTM. Results: Viabilities of HCEpiCs exposed to MPS A-F for a 2h were not affected, whilereductions (52~75%) in cell viability over a 12h exposure of MPS B, MPS C, MPS D and MPS F, and significantmore reductions (29~73%) over a 24h and 48h-exposure. Apoptosis of HCEpiC was not affect over a 12h MPSexposure, however was significantly increased (199~526%) over 24h and 48h MPS exposure. Among theproducts MPS D, E and F reduced viability of HCEpiCs and apoptosis increased more than MPS A (p<0.05). Conclusions: Lower concentration of MPSs have not an cytotoxic effect on HCEpiCs, however higherconcentration of MPSs induce apoptosis and reduce viability of HCEpiCs. Therefore, it need to develop MPShaving antimicrobial effectiveness with low cytotoxicity. 목적: 시판되고 있는 소프트콘택트렌즈용 다목적용액이 사람의 각막상피세포에 미치는 세포독성을 이미지 분석법을 이용하여 평가하고자 하였다. 방법: 각막상피세포를 6종류의 다목적용액(A~F)이 0.05~50% 포함된 배양액에서각각 2시간, 12시간, 24시간, 48시간 동안 배양하였다. 배양 후 각막상피세포를 고정한 다음 Draq 5로 염색하고 공초점현미경과 ImageXpress UltraTM를 이용하여 세포형태를 관찰하고 세포생존율과 세포자살(apoptosis)을 비교하였다. 결과: 각막상피세포 생존율과 세포자살은 다목적용액을 2시간 처리한 경우에는 모든 제품에서 대조군과 차이가없었으나, 12시간 이상 처리한 경우에는 B~F 제품에서 대조군의 52~75% 수준으로 감소하였고, 세포자살은 모든 제품에서 차이가 없었다. 24~48시간 처리한 경우에는 생존율이 29~73% 수준으로 감소하였고(p<0.05), 세포자살은199~526% 증가하였다. 제품별로는 다목적용액 D, E, F가 A보다 각막상피세포 생존율을 감소시켰고 세포자살을 증가시켰다(p<0.05). 결론: 저농도의 다목적용액은 각막상피세포 독성에 영향을 미치지 않지만 고농도의 다목적용액은각막상피세포의 자살을 유도하고 세포생존율을 저하시킬 수 있으므로 다목적용액의 성분은 소독기능이 우수하고 독성이 없는 성분으로 개발되어야 할 것으로 사료된다.
대인관계로 인한 적응장애로 유발된 심신증 환자 치험 1례
김남열,유종호,김근우,배재익 대한한방신경정신과학회 2012 동의신경정신과학회지 Vol.23 No.4
Objectives :This study aims to research the effect of oriental psychotherapy and treatments for reduction of Psychosomatic disorder symptoms caused by maladjustment of interpersonal relationship. Methods :We treat a patient with Oriental medical treatment (acupuncture, moxibustion, cupping and aroma therapy, oriental psychotherapy and Herb-medication) and follow up the changes of stress index for 3 times per 8 days. Results & Conclusions :After oriental psychotherapy and treatments, clinical symptoms of the patient were improved and the patient overcoming psychosomatic disorder can go back to the workplace. It is suggested that oriental psychotherapy and treatments are effective on psychosomatic disorder.
수소를 연료로 하는 소형 파워팩 개발에 관한 연구 ( I )
김남열,김강출,임옥택 한국수소및신에너지학회 2010 한국수소 및 신에너지학회논문집 Vol.21 No.4
Current rechargeable battery cannot provide high energy density and the operational durations required. But linear engine/generators provide high energy density for portable power applications because fuel is more high density. In this paper, we suggest that basic design of powerpack using linear engine for assisting power output. Efficiency is relatively high because linear engine don't have crank mechanism compared with rotary engine.We made prototype engine and had experiments to know moving characteristic about the Linear Engine. It was possible to operate velocity at 50 Hz at the firing and pressure in cylinder was 16bar.
천연광물의 양극성 표면개질을 이용한 상수원수 중 중금속제거 특성
김남열,김영희 한국환경보건학회 2019 한국환경보건학회지 Vol.45 No.6
Objectives: The most commonly detected heavy metals in rocks and soils, including Pb, Cd, Cu, Fe, Mn and As, are representative pollutants discharged from abandoned mines and have been listed as potential sources of contamination in drinking water. This study focused on increasing the removal efficiency of heavy metals from drinking water resources by surface modification of natural adsorbents to reduce potential health risks. Methods: Iron oxide coating and graft polymerization with zeolites and talc was conducted for bipolar surface modification to increase the combining capacity of heavy metals for their removal from water. The removal efficiency of heavy metals was measured before and after the surface modification. Results: The removal efficiency of Pb, Cu, and Cd by surface modified zeolite showed 100, 92, and 61.5%, respectively, increases compared to 64, 64, and 38% for non-modified zeolite. This implies that bipolar surface modified natural adsorbents have a good potential use in heavy metal removal. The more interesting finding is the removal increase for As, which has both cation and anion characteristics showing 27% removal efficiency where as non-modified zeolite showed only 2% removal. Conclusions: Zeolite is one of the most widely used adsorptive materials in water treatment processes and bipolar surface modification of zeolite increases its applicability in the removal of heavy metals, especially As.
보존제 PHMB(polyhexamethylene biguanide)-EGCG(epigallocatechin gallate) 혼합물의 각막상피세포 급성독성 평가
김남열,이군자 대한시과학회 2018 대한시과학회지 Vol.20 No.4
목적: 항균제 polyhexamethylene Biguanide(PHMB), epigallocatechin gallate(EGCG) 및 PHMB/EGCG 혼합물의 각막상피세포(primary human corneal epithelial cells, HCEpiCs)에 대한 급성독성을 평가하고자 하였다. 방법: 각막상피세포를 0.00001~0.005% PHMB, 0.001~5% EGCG 및 0.00005% PHMB/0.05% EGCG 혼합물이 각각 포함된 배양액에서 30분, 60분, 120분 및 240분 동안 배양하였다. 배양한 각막상피세포를 고정한 다음 Draq 5로 염색하고 공초점현미경과 ImageXpress UltraTM를 이용하여 세포형태를 관찰하여 세포 생존율과 세포자살(apoptosis)을 비교하였다. 결과: 배양된 각막상피세포는 0.00005% 이하의 PHMB 농도 및 0.05% 이하의 EGCG 농도에서는 세포 독성이 나타나지 않았다. 0.00005% PHMB/0.05% EGCG 혼합물이 포함된 배양액에서 급성 세포독성은 관찰되지 않았으나 240분 배양시킨 경우에는 손상된 각막상피세포 수가 증가하고 생존 세포의 수는 감소하였다. 결론: 항균 시너지 효과를 갖는다고 보고된 0.00005% PHMB/0.05% EGCG 혼합물의 경우 각막상피세포에 대한 급성독성은 없었으나 만성효과에 대해서는 추가적인 연구가 필요할 것으로 생각된다. Purpose : To evaluate the acute cytotoxic effect of polyhexamethylene biguanide (PHMB), epigallocatechin gallate (EGCG) and PHMB/EGCG mixture on the cultured human corneal epithelial cell (HCEpiC). Methods : HCEpiCs were cultured in the media of HCEpiC containing 0.00001~0.005% PHMB, 0.001~5% EGCG and 0.00005% PHMB/0.05% EGCG mixture respectively for 30, 60, 120 and 240 min. Cultured HCEpiCs were fixed and stained with Draq5 and cell viability and apoptosis were evaluated using confocal microscope and ImageXpress UltraTM. Results : Cultured HCEpiC did not show cytotoxic effect at below 0.00005% PHMB and below 0.05% EGCG concentration. In the media containing 0.00005% PHMB/0.05% EGCG, acute cytototoxic effect was not found, whereas damaged HCEpiCS were increased and survival cells were decreased in the media incubated for 240 min. Conclusion : The mixture of 0.00005% PHMB/0.05% EGCG showed non acute cytotoxic effect on the cultured HCEpiCs, however it is needed to investigate its chronic cytotoxic effect.