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- 저자 : 이수현 (검색결과 1,046 건) 검색분석정보 보기
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타인을 위한 생명보험에서의 서면동의[토론문] / 이수현
이수현 한국보험법학회 2015 한국보험법학회 학술발표회 논문집 Vol.2015 No.3
'스콜라' 이용 시 소속기관이 구독 중이 아닌 경우, 오후 4시부터 익일 오전 7시까지 원문보기가 가능합니다.
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이수현,김응주,Dong-Hyoung Lee,이원용,정봉철,서홍석,최만호 대한진단검사의학회 2016 Annals of Laboratory Medicine Vol.36 No.4
Background: Eicosanoids are metabolites of arachidonic acid that are rapidly biosynthesized and degraded during inflammation, and their metabolic changes reveal altered enzyme expression following drug treatment. We developed an eicosanoid profiling method and evaluated their changes on drug treatment. Methods: Simultaneous quantitative profiling of 32 eicosanoids in liver S9 fractions obtained from rabbits with carrageenan-induced inflammation was performed and validated by liquid chromatography-mass spectrometry coupled to anion-exchange solid-phase purification. Results: The limit of quantification for the devised method ranged from 0.5 to 20.0 ng/mg protein, and calibration linearity was achieved (R2>0.99). The precision (% CV) and accuracy (% bias) ranged from 4.7 to 10.3% and 88.4 to 110.9%, respectively, and overall recoveries ranged from 58.0 to 105.3%. Our method was then applied and showed that epitestosterone treatment reduced the levels of all eicosanoids that were generated by cyclooxygenases and lipoxygenases. Conclusions: Quantitative eicosanoid profiling combined with in vitro metabolic assays may be useful for evaluating metabolic changes affected by drugs during eicosanoid metabolism.
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Elementary Students’ Clothing Color Preferences and the Colors of Clothes Worn at School
이수현,진현정 한국패션비즈니스학회 2019 패션 비즈니스 Vol.23 No.6
This study analyzed the clothing color preferences of elementary students and the colors of clothes actually worn at school in terms of hue and tone. The sample consisted of 385 students enrolled at a public elementary school in Seoul. In this study, 120 color cards were used to guide the hue and tone. Descriptive statistics and chi-square analysis were used to analyze the data. The results were as follows. First, the most preferred clothing colors were achromatic, purple blue, red, and blue, while the most preferred tones were vivid, and pale. Second, the largest percentage of top colors worn at school were achromatic and vivid tones, while the largest percentage of bottom colors at school were achromatic and dark tones. Third, elementary boys preferred vivid and strong tones, while girls preferred pale and vivid tones. Fourth, students at higher grades preferred deeper and darker tones compared with students in lower grades.
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상온 이온성 액체로 활성화시킨 고온 작동 가능한 Nafion 고분자 전해질
이수현,임태은,박영돈,문준영 한국고분자학회 2018 폴리머 Vol.42 No.4
Nafion polymer electrolyte, which is essential material of polymer fuel cells, is activated by water and shows conductivity. However, such aqueous electrolyte is volatile at room temperature, and the operating temperature is limited to 100 oC. In order to overcome this problem, we tried to activate Nafion polymer electrolyte by using room temperature ionic liquids. The influence of the molecular structure of room temperature ionic liquid on conductivity is evaluated by controlling ethyl, butyl, and iso-butyl groups into an alkyl group of alkylmethylimidazolium cation. Also their anion structure is controlled with tetrafluoroborate and bis[(trifluoromethyl)sulfonyl]imide. For the high conductivity of Nafion polymer electrolytes, Nafion polymer electrolytes with high conductivity and high temperature operation are studied by mixing 60-120 wt% of room temperature ionic liquids during casting of Nafion solution. 고분자 연료전지의 핵심 소재 중 하나인 Nafion 고분자 전해질은 전도성을 부여하기 위해 물을 이용하여 활성화하여 사용한다. 그러나 수용액은 상온에서도 휘발성이 있고, 끓는점이 100 oC로 제한되어 고분자 연료 전지의작동 온도 범위를 제한하는 가장 큰 이유로 지적되고 있다. 이를 극복하기 위하여, 상온에서 휘발성이 없으면서도전도성을 띠는 상온 이온성 액체를 이용하여 Nafion 고분자 전해질을 활성화하고자 하였다. 상온 이온성 액체의 구조가 전도도에 미치는 영향성을 파악하기 위해, 상온 이온성 액체의 alkyl-methylimidazolium 양이온을 기준으로alkyl기에 ethyl, butyl, iso-butyl 기를 각각 도입하고, 음이온을 tetrafluoroborate, bis[(trifluoromethyl)sulfonyl]imide) 로 제어하여, Nafion 고분자 전해질을 활성화하였다. 또한 Nafion 고분자 전해액 내에 높은 상온 이온성 액체 함침(impregnation)을 통한 높은 전도성 구현을 위하여, Nafion 용액의 casting 시 60-120 wt%의 상온 이온성 액체를 혼합하여, 높은 전도도와 고온 작동성을 갖는 Nafion 고분자 전해질을 연구하였다.
