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6 장 상피세포에서 Lactobacillus casei가 대장균 리포다당질 유도에 의한 Toll-like receptor 4와 IL-8 mRNA 발현에 미치는 영향
박준용 ( J. Y. Park ),한동수 ( D. S. Han ),이항락 ( H. L. Lee ),김진배 ( J. B. Kim ),이오영 ( O. Y. Lee ),손주현 ( J. H. Sohn ),최호순 ( H. S. Choi ),박윤경 ( Y. K. Park ),함경수 ( K. S. Hahm ),함준수 ( J. S. Hahm ) 대한소화기학회 2002 대한소화기학회 추계학술대회 Vol.2002 No.-
문경덕,김무섭,정치윤,박윤경,신승용,오창목,박준석,신형철,Moon, K.D.,Kim, M.S.,Jeong, C.Y.,Park, Y.K.,Shin, S.Y.,Oh, C.M.,Park, J.S.,Shin, H.C. 한국전자통신연구원 2019 전자통신동향분석 Vol.34 No.4
Sensory substitution involves mapping the characteristics of one sensory modality to the stimuli of another sensory modality. In general, when a person is visually impaired or deaf, they do not actually lose their ability to see or hear completely; however, they only lose their ability to transmit sensory signals from the periphery to the brain. It has been experimentally proven that a person who has lost the ability to retrieve data from the retina can still visualize subjective images by using data transferred from other sensory modalities such as tactile or auditory modalities. This is because vision processing pathways are still intact in most cases. Therefore, sensory substitution uses human perception and the plasticity of the human brain to transmit sensory signals through pathways that have not been lost. In this study, we analyze the characteristics and problems of various devices used for sensory substitution and summarize the recent technological trends in these devices.
탄소화합물/Polymer Binder 복합체를 이용한 기체확산층 제조 및 성능 평가
이지정(Lee, J.J.),최범철(Choi, Bum-Choul),박윤경(Park, Y.K.),이재영(Lee, Jae-Young),이홍기(Lee, Hong-Ki) 한국신재생에너지학회 2011 한국신재생에너지학회 학술대회논문집 Vol.2011 No.05
고분자전해질 연료전지 (PEMFC)의 가격 결정 요인 중 막 전극 접합체 (MEA)가 차지하는 비중은 약 45%정도이며, 이것을 구성하는 주요 부품인 기체 확산층 (GDL)은 carbon paper나 carbon cloth 형태가 사용되고 있다. 그렇지만 GDL을 제조하는 공정은 매우 복잡하고, 그 가격이 너무 높은 단점이 있다. 본 연구에서는 카본블랙, 흑연 등의 탄소화합물과 polymer binder를 이용하여 단순화된 공정으로 GDL을 제조하였다. 또한, GDL의 물리적 특성이 전극 성능에 미치는 영향을 분석하기 위하여 표면 morphology, 접촉각 및 표면에너지, 전기전도도, 기체투과도, porosity, pore distrivution 등을 측정하였고, 각각의 GDL 표면에 동량의 Pt 촉매를 도포하여 MEA를 제작한 후 그 성능을 평가하였다.
색소환원시간에 의한 우육의 신속 미생물 검사법에 관한 연구
임상동,김기성,박윤경 한국동물자원과학회 2001 한국축산학회지 Vol.43 No.2
In order to investigate a reliable and rapid evaluation method in estimating the microbial contents in beef, the resazurin color reduction method was adopted and investigated in views of analysis cost; lavor-savings, time-consumption. and accuracy. The results were summarized as follows; Regression equation(RE) between resazurin reduction time(X) from blue color to bluish purple color during incubation at 25℃, 30℃ and 35℃ and initial bacterial log count(Y) was Y = -0.1337X + 4.6387, Y = -0.2661X + 4.8435 and Y = -0.2405X + 4.4971, with a correlation coefficient of -0.25, -0.44 and -0.32, respectively. The times required to obtain results were 4.8 to 19.7hr, 3.2 to 10.7hr and 2.1 to 10.4hr, respectively. RE between resazurin reduction time(X) from blue color to purple color during incubation at 25℃, 30℃ and 35℃ and initial bacterial log count(Y) was Y = -0.2434X + 5.7529. Y = -0.3161X + 5.8029 and Y = -0.3853X + 5.8168, with a correlation coefficient of -0.68, -0.73 and -0.66, respectively. The times required to obtain results were 7.2 to 15.4hr, 5.7 to 12.0hr and 4.7 to 9.9hr, respectively. RE between resazurin reduction time(X) from blue color to pink color during incubation at 25℃. 30℃ and 35℃ and initial bacterial log count(Y) was Y = -0.3066X + 6.9948, Y = -0.3759X + 7.1319 and Y = -0.3324X + 6.2307, with a correlation coefficient of -0.92. -0.93 and -0.69, respectively. The times required to obtain results were 9.8 to 16.3hr. 8.3 to 13.7hr and 6.7 to 12.7hr, respectively.