조류제거를 위한 구리이온 발생 반응기의 특성 연구

이선영,김혜연,주재백,Lee, Sun-Young,Kim, Hae-Yon,Ju, Jeh-Beck 한국전기화학회 2012 한국전기화학회지 Vol.15 No.1

조류제거를 위한 구리이온을 생성하기 위한 환형 흐름 구리 전기분해 반응기 시스템을 구성하고 그 가동특성에 대하여 고찰하였다. 또한 구리이온이 조류에 미치는 영향도 살펴보았다. 인가전류를 증가하면 균등조로부터 배출되는 구리 이온 농도가 비례적으로 증가함을 알 수 있었다. 전류 밀도를 조절하여 원하는 구리농도를 얻을 수 있음을 알았으며 패러데이 효율은 90% 이상임을 알 수 있었다. 유량을 증가시키면 구리이온농도는 감소하였으며 이는 전극에서의 반응속도와는 상관없이 물의 증가량에 따른 희석 때문임을 알 수 있었으며 농도 과전위 영향은 미미하였다. pH가 증가할수록 생성되는 구리이온 농도는 이에 반비례하여 감소하였고 전기전도도의 변화는 배출되는 구리이온 농도에 별 영향을 미치지 않았다. 구리이온 농도가 증가시킬 경우 Chlorophyll-a 농도가 크게 감소함을 볼 수 있으며, 구리 이온 농도가 0.2 ppm 이상일 때 조류가 효과적으로 제거됨을 알 수 있다. 황산구리를 용해시킨 구리이온이나 전기분해를 통해 얻은 구리이온을 투여한 경우 별차이가 없었으며 5일 후 조류 제거효율은 0.4 ppm이상의 농도에서는 90%이상이었다. An annular flow type of copper electrolysis reactor was setup in order to generate the copper ions to remove algae in water. The operating characteristics of the reactor and the effect of copper ion on algae have been considered. By controling the applied current, the copper ion concentration could be obtained as desired level and the faradaic efficiency was above 90%. When the flow rate was increased, the copper ion concentration was linearly decreased due to the dilution effect and the effect of concentration overpotential was insignificant. With the increase of pH in water, the copper ion concentration was linearly decreased and not affected by the conductivity of the water. The concentration of chlorophyll-a was sharply decreased with the increase of copper ion concentration. The algae was effectively removed as the copper ion concentration was above 0.2 ppm. There was no difference between the copper ions obtained by dissolving copper sulfate and those produced by copper electrolysis. The algae removal efficiency was above 90% after 5 days as the copper ion concentration was above 0.4 ppm.

에틸렌옥사이드(Ethylene oxide)에 노출된 병원 근로자들의 소핵 빈도와 유전적 감수성 지표와의 연관성

이선영,김양지,최영주,이중원,이영현,신미연,김원,윤충식,김성균,정해원,Lee, Sun-Yeong,Kim, Yang-Jee,Choi, Young-Joo,Lee, Joong-Won,Lee, Young-Hyun,Shin, Mi-Yeon,Kim, Won,Yoon, Chung-Sik,Kim, Sung-Kyoon,Chung, Hai-Won 한국환경보건학회 2011 한국환경보건학회지 Vol.37 No.6

Objectives: Ethylene oxide (EtO) is classified as a human carcinogen, but EtO is still widely used to sterilize heat-sensitive materials in hospitals. Employees working around sterilizers are exposed to EtO after sterilization. The aim of the present study was to assess the exposure of EtO level, coupled with occupationally induced micronuclei from hospital workers. The influence of genetic polymorphisms of detoxifying genes (GSTT1 and GSTM1) and DNA repair genes (XRCC1 and XRCC3) on the frequencies of micronuclei in relation to exposure of EtO was also investigated. Methods: The study population was composed of 35 occupationally exposed workers to EtO, 18 student controls and 44 unexposed hospital controls in Korea. Exposure to EtO is measured by passive personal samplers. We analyzed the frequencies of micronuclei by performing cytokinesis-block micronucleus assay (CBMN assay) and GSTM1, GSTT1, XRCC1, and XRCC3 were also genotyped by performing polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP). Results: The frequencies of micronuclei in EtO exposure group, student controls and hospital controls were $18.00{\pm}7.73$, $10.47{\pm}7.96$ and $13.86{\pm}6.35$ respectively and their differences were statistically significant, but no significant differences according to the level of EtO were observed. There was a dose-response relationship between the frequencies of micronuclei and cumulative dose of EtO, but no significantly differences were observed. We also investigated the influence of genetic polymorphisms (GSTM1, GSTT1, XRCC1, and XRCC3) on the frequencies of micronuclei, but there were no differences in the frequencies of micronuclei by genetic polymorphisms. Conclusions: The frequencies of micronuclei in EtO exposure group was significantly higher than control groups. A dose-response relationship was found between the level of EtO exposure and the frequencies of micronuclei, but no statistically differences were observed. We also found that the frequencies of micronuclei were increased according to cumulative EtO level. There was no association of the genetic GSTM1, GSTT1, XRCC1, and XRCC3 state with the frequency of micronuclei induced by EtO exposure.

스펀본드 부직포의 흡음성에 대한 구조적 요인 효과 연구

이선영,이지은,변태웅,이승구,Lee, Sun Young,Lee, Ji Eun,Byun, Tae Woong,Lee, Seung Goo 한국섬유공학회 2015 한국섬유공학회지 Vol.52 No.6

Nonwovens have been proposed as a sound absorber in applications of home interior textile industry for effective noise control. Honeycomb cell blind textiles have been increasingly used in window covering for noise reduction. In this study, the effect of structural parameters of honeycomb cell-structured spunbond nonwoven on the sound absorption property was investigated. Spunbond nonwovens with various thicknesses, areal densities, and porosities were used, and they were joined in the form of a honeycomb cell structure with various cell widths and cell layering. The sound absorption property of the nonwoven improved with increasing thickness. The porosity of the nonwoven was shown to be proportional to the noise reduction coefficient (NRC). An increased air gap between two layers of the nonwoven shifted the maximum sound absorption coefficient toward a lower frequency range. The honeycomb cell structure was confirmed to contribute to an improvement of the sound absorption property. Layering of the honeycomb cell structure was also shown to be a critical factor in controlling the sound absorption property of the nonwoven.

초등학교시설의 유니버설 디자인에 관한 연구 - 설계지침 분석을 중심으로 -

이선영,이민우,Rieh, Sun-Young,Lee, Min-Woo 한국교육시설학회 2016 敎育施設 Vol.23 No.2

In the context of lifelong education program for an aging society and information age, elementary school facilities are expected to accommodate various people in diverse age group and diverse physical abilities. Introduction of the 'Universal Design' concept seems inevitable in school environment in terms of public infra structure for community. However, in architectural point of view, unlike foreign examples, simply applied barrier-free and safety standards of domestic guidelines based on dimensional data does not function enough to achieve universal design in authentic manner. This study is focused on this issue and suggests the direction of improvement for architectural design guidelines. Through the comparative analysis of foreign and domestic design guidelines, two principles of universal design-'Flexibility in Use', 'Perceptile Information'- are found to be lacking in the domestic design guidelines for elementary school facilities. It is expected for government authority to develop more concrete guidelines to achieve universal design for school as a basic public space in the community.

무농약·유기재배 사과원에서 교미교란제를 이용한 복숭아순나방과 복숭아심식나방의 방제

이선영,최경희,도윤수,이순원,윤창만,김길하,Lee, Sun-Young,Choi, Kyung-Hee,Do, Yun-Su,Lee, Soon-Won,Yoon, Changmann,Kim, Gil-Hah 한국응용곤충학회 2014 한국응용곤충학회지 Vol.53 No.2

복숭아순나방과 복숭아심식나방의 방제를 위해 교미교란제 MD-IKR (Isomate-KR)과 MD-CR (Confuser-R)의 효과를 무농약 유기재배 사과원에서 평가하였고 관행방제 사과원과 비교하였다. 2011년 칠곡지역의 복숭아순나방에 대한 두 종의 교미교란제에 대한 교미저해율은 99.8%였고, 상대적으로 청송지역의 교미저해율이 각각 99.8과 92.8%로 칠곡지역과 차이가 있었다. 2012년 칠곡지역의 교미저해율은 각각 92.4와 96.7%였다. 청송지역에서 교미저해율은 99.6%로 가장 높은 교미저해율을 보였다. 2011년 2012년의 복숭아심식나방에 대한 교미저해율은 두 교미교란제 모두 100%로 높게 나타났다. 두 교미교란제는 복숭아순나방과 복숭아심식나방이 방제효과에 대하여 무방제구 대비 방제효과가 월등하였고, 관행방제와 비교했을 때 통계적으로 유의성 없이 방제효과가 대등하였다. 두 종의 교미교란제와 관행재배구의 새순과 과실피해율은 무방제구 대비 유의성있는 방제효과를 보였다. 두 종의 교미교란제 간에는 효력의 차이가 없어 MD-IKR이 MD-CR을 충분히 대체할 수 있을 것으로 판단된다. The efficacy of mating disruptors MD-IKR (Isomate-KR) and MD-CR (Confuser-R) for controlling Grapholita molesta (Busck) and Carposina sasakii (Matsumura) was evaluated in non-chemical or organic apple orchards. For G. molesta, the efficacy of MD-IKR and MD-CR in Chilgok was 99.8 and 99.8% (2011) and 92.4 and 96.7% (2012), respectively, showing different mating reduction values. The efficacy of MD-IKR and MD-CR in Cheongsong was 99.1 and 92.8% (2011) and 99.6 and 99.6% (2012), respectively. For C. sasakii, the efficacy of MD-IKR and MD-CR was 100% at Chilgok and Cheongsong in 2011 and 2012. Evaluation of the shooting and fruit damage rates showed that the efficacy of the mating disruptors in controlling G. molesta and C. sasakii was better than that of the non-control. However, there was no significant control difference between using the mating disruptors and the conventional control. No difference in the efficacy of the two mating disruptors was observed. We believe that MD-IKR could be an alternative to MD-CR.

Sesaminol Glucosides의 기억력 회복능 및 ${\beta}$, ${\gamma}$-Secretase

이선영,손동주,하태열,홍진태,Lee, Sun-Young,Son, Dong-Ju,Ha, Tae-Youl,Hong, Jin-Tae 대한약학회 2005 약학회지 Vol.49 No.2

Alzheimers disease (AD) is the most prevalent form of neurodegenerations associated with aging in the human population. This disease is characterized by the extracellular deposition of beta-amyloid (A ${\beta}$) peptide in cerebral plaques. The A ${\beta}$ peptide is derived from the ${\beta}$-amyloid precursor protein ( ${\beta}$APP). Photolytic processing of ${\beta}$APP by ${\beta}$-secretase(beta-site APP-cleaving enzyme, BASE) and ${\gamma}$-secretase generates the A ${\beta}$ peptide. Several lines of evidence support that A ${\beta}$-induced neuronal cell death is major mechanisms of development of AD. Accordingly, the ${\beta}$-and ${\gamma}$-secretase have been implicated to be excellent targets for the treatment of AD. We previously found that sesaminol glucosides have improving effect on memory functions through anti-oxidative mechanism. In this study, to elucidate possible other mechanism (inhibition of ${\beta}$-and ${\gamma}$-secretase) of sesaminol glucosides, we examined the improving effect of sesaminol glucosides in the scopolamine (1 mg/kg/mouse)-induced memory dysfunction using water maze test in the mice. Sesaminol glucosides (3.75, 7.5 mg/kg/6ml/day p.o., for 3 weeks) reversed the latency time, distance and velocity by scopolamine in dose dependent manner. Next, ${\beta}$-and ${\gamma}$-secretase activities were determined in different regions of brain. Sesaminol glucosides dose-dependently attenuated scopolamine-induced ${\beta}$-secretase activities in cortex and hippocampous and ${\gamma}$-secretase in cortex. This study therefore suggests that sesaminol glucosides may be a useful agent for prevention of the development or progression of AD, and its inhibitory effect on secretase may play a role in the improving action of sesaminol glucosides on memory function.

탄소나노튜브와 하이퍼브랜치 폴리우레탄 혼합용액의 스프레이 코팅에 의한 직물의 전기발열 효과와 발수성

이선영,조재환,김영호,Lee, Sun-Young,Cho, Jae-Whan,Kim, Young-Ho 한국섬유공학회 2010 한국섬유공학회지 Vol.47 No.3

Cotton and polyester fabrics were coated with a hyperbranched polyurethane (HBPU) solution including multi-walled carbon nanotubes (MWNTs) using a spraying method. The MWNT-coated fabrics showed good water repelling properties at $70^{\circ}C$ and room temperature due to presence of well dispersed MWNTs on the fabric surface. The electrical heating effect of the MWNT-coated fabrics was demonstrated when a DC voltage of 10-30 V was applied to the fabrics, which was dependent on the electrical conductivity of the MWNT/HBPU composites. The MWNT coating on the fabric surface by spraying may be a good method for achieving electrical heating and water repellence.

기저세포암의 bcl - 2 발현에 대한 면역조직화학적 연구

이선영,최규철 ( Sun Young Lee,Kyu Chul Choi ) 대한피부과학회 1997 大韓皮膚科學會誌 Vol.35 No.2

Background: Basal cell carcinoma(BCC) is the most common tumor of light-skinned people. Most of them are relatively innocuous, but some may cause extensive tissue destruction, and result in death by local infiltration of vital structure or metastatic disease. The bcl-2 is a protooncogene involved in tumorigenesis by blocking apoptosis or programmed cell death. Objective : To investigate whether there was a difference in bcl-2 expression in different histopathological types of BCC. Method: We performed immunohistochemical staining by using a monoclonal mouse anti-human bcl-2 oncoprotein in 28 BCC(nodular: 7 cases, micronodular; 3 cases, adenoid; 1 case, infiltrative; 9 cases, and mixed; 8 cases). Result: All 28 BCC expressed bcl-2, and the degree of staining was different according to histopathological types; poor prognostic micronodular(100%) and infiltrative(73.3%) types were relatively strong, and nodular(66.7% ) and adenoid(75.0%) types were moderate. Conclusion . These results suggest that the degree of bcl-2 expression in BCC seems to be dependent to the histopathological types together with clinical behavior. (Kor J Dermatol 1997;35(2): 242-248)

Hybrid Capacitor의 전기화학적 특성 및 Hybrid Capacitor / Li-ion Battery의 펄스 방전 특성

이선영,김익준,문성인,김현수,Lee, Sun-Young,Kim, Ick-Jun,Moon, Seong-In,Kim, Hyun-Soo 한국전기전자재료학회 2005 전기전자재료학회논문지 Vol.18 No.12

In this study, we have prepared, as the pluse power source, a commercially supplied Li-ion battery with a capacity of 700 mAh and AC resistivity of 60 md at 1 kHz and nonaqeous asymmetric hybrid capacitor composed of an activated carbon cathode and MCMB anode, and have examined the electrochemical characteristics of hybrid capacitor and the pulse performances of parallel connected hybrid capacitor/Li-ion battery source. The nonaqueous asymmetric hybrid capacitors constituted with each stack number of pairs composed of the cathode, the porous separator and the anode electrode were housed in Al-laminated film cell. The 10 stacked hybrid capacitor, which was charged and discharged at a constant current at 0.25 $mA/cm^2$ between 3 and 4.3 V, has exhibited the capacitance of 108F and the lowest equivalent series resistance was 32 $m{\Omega}$ at 1 kHz. On the other hand, the enhanced run time of Li-ion battery assisted by the hybrid capacitor was obtained with increasing of current density and pulse width in Pulse mode. The best improvement, $84\;\%$ for hybrid capacitor/Li-ion battery was obtained in the condition of a 7C-rate pulse (100 msec)/0.5C-rate standby/$10\;\%$ duty cycle.

폴리우레탄으로 가교화한 탄소나노튜브 나노복합체의 합성과 특성

이선영,정용채,조재환,전병철,Lee, Sun-Young,Jung, Yong-Chae,Cho, Jae-Whan,Chun, Byoung-Chul 한국섬유공학회 2008 한국섬유공학회지 Vol.45 No.4

Polyurethane(PU)-crosslinked multi-walled carbon nanotubes(MWNTs) with different MWNTs content were synthesized, and their morphology and crystallization were investigated. The crosslinking of MWNTs with PU was achieved by reacting MWNTs treated chemically in the mixed acids with prepolymer obtained from a reaction of diisocyanate and polyol. The functioanlization of MWNTs with PU was confirmed by FT-IR, Raman, and XPS measurements, and their morphology was observed by SEM and TEM measurements. Optimum content of MWNTs for PU-crosslinked MWNTs was dependent on an amount of prepolymer and concentration of -OH group in MWNTs. The crystallinity of poly($\varepsilon$-caprolactone)-based PU decreased with an increase of MWNTs content, and it was ascribed to the confinement of crystallization of PCL molecules due to the crosslinking of PU with MWNTs.