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정하원,Louis Hamenu,이해수,Mohammed Latifatu,김광만,고장면 한국물리학회 2015 Current Applied Physics Vol.15 No.4
In this work, lithium-modified silica nanosalt (Li202) is solution-synthesized and used as a gel-forming additive in 1.5 M tetraethylammonium tetrafluoroborate (TEABF4)/acetonitrile (ACN) electrolyte solution for the supercapacitor with activated carbon electrode. The electrochemical properties of the supercapacitor adopting the Li202 (5 wt.%) are investigated using linear sweep voltammetry, cyclic voltammetry, and complex impedance spectroscopy. By the addition of the Li202, the electrochemical stability of the electrolyte is improved over 4.0 V (corresponding to the current density below 0.6 mA cm-2) and higher specific capacitances at the scan rates of 10e500 mV s-1 are obtained. Thus, the Li202 can be considered as a promising electrolyte additive to enhance the supercapacitive properties of activated carbon electrode.
Repair of Nasal Septal Perforation with Autologous Auricular Cartilage in Rabbits
정하원,김영기,민양기 대한비과학회 1995 Journal of rhinology Vol.2 No.1
This study was designed to evaluate the feasibility of auricular cartilage implantation for the treatment of nasal septal perforation. A perforation was made in the nasal septal cartilage in 5 rabbits and auricular cartilage with intact perichondrium on either side was implanted septum. The implanted tissue was taken 4 weeks later, and examined grossly and histologically. The implanted site was completely epithelialized, and scar formation was minimal. The implanted cartilage was completely lined by ciliated columnar epithelium. Proliferation of the implanted cartilage and scattered ossification were observed, which indicated the proliferating potential of chondrocytes of the implanted perichondrium. The results of this study suggest that auricular cartilage implantation may be one of acceptable surgical procedures for the repair of nasal septal perforation.