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RDE 를 이용한 구리이온의 환원속도 및 전착형태에 관한 고찰
남상철,엄성현,이충영,탁용석,남종우 ( Sang Cheol Nam,Sung Hyun Um,Choong Young Lee,Yongsug Tak,Chong Woo Nam ) 한국공업화학회 1997 공업화학 Vol.8 No.4
백금 회전전극을 이용하여 확산지배영역에서의 구리 착화합물의 환원에 대한 전기화학적 특성조사 및 이에 대한 속도인자들을 구하였다. 황산염 용액내에서 Cu(II)의 환원은 2전자, 1단계 반응이며, 염화물 용액내에서 의 Cu(II)는 1전자, 2단계 반응으로 환원된다. 환원반응에서의 전달계수는 황산염 용액내에서 Cu(II)가 가장 작으며, 할로겐염 중에서 Cu(I)의 전달계수는 1에 가까운 값을 나타내었다. 염화물 용액안에서 구리이온의 환원에 대한 표준속도상수는 Cu(II)의 환원이 Cu(I)을 출발물질로 할 경우보다 100배 정도 빠른 값을 나타내었다. 그리고 확산계수는 Cl^- 존재시의 Cu(II), I^-, Br^-, Cl^- 존재시의 Cu(I) 및 So₄^(-2) 존재시의 Cu(II)의 순으로 증가하였으며, 각 용액 내에서의 구리이온의 반지름 및 확산에 대한 활성화 에너지도 위의 순서와 동일하게 감소하였다. 회전전극상의 구리전착의 경우 전착전위 및 농도에 따라 불균일한 전착표면을 형성하였으며, 이러한 전착표면의 불균일성은 UV/VIS로 분석이 가능하였다. Electrochemical characteristics and kinetic parameters of copper ion reduction were investigated with a platinum rotating disk electrode (RDE) in a diffusion controlled region. Reduction of Cu(II) in sulfate solution had one-step two-xelectron process, while the reduction of Cu(II) in chloride solution was involved two one-electron processes. The transfer coefficient of Cu(II) in sulfate solution was lowest, and the transfer coefficient of Cu(I) in halide solutions had the value of nearly one. In chloride solutions, electrodeposition rate of Cu(II) was about one hundred times faster than Cu(I). Diffusion coefficient increased in the order of Cu(II) in chloride solution, Cu(I) in the iodide, bromide, chloride solution, Cu(II) in sulfate solution. The calculated ionic radii and activation energy for diffusion decreased in the same order as above. Morphological study on the copper electrodeposition indicated that the electrode surface became rougher as both concentration and reduction potential increases, and the roughness of the surface was analyzed with UV/VIS spectrophotometer.
일제치하(日帝治下)부터 1970년대까지의 한국(韓國) 침구학사(鍼灸學史)에 대한 고찰
서정철,남상수,안병철,Seo, Jung-Chul,Nam, Sang-Soo,Ahn, Byung-Cheol 대한침구의학회 2001 대한침구의학회지 Vol.18 No.4
Objective ; This Study was carried out to review the history of acupuncture & moxibustion in Korea under the control of imperialized Japan and to compare the history among Korea, China and Japan. Results ; Under the control of imperialized Japan the science of acupuncture & moxibustion in Korea has experienced the dark ages because of the momentary disordered medical laws made by Japan. As we compare the history of acupuncture & moxibustion among Korea, China and Japan, Korea was simple but systemic, China was complicate but complex and Japan was nearly surgical. Conclusion ; The science of acupuncture & moxibustion of Korea was mostly advanced in the late Chosun and did not just imitate that of China and has advanced uniquely.