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코팅 방법에 따른 SnO<sub>2</sub>/Ti 전극의 제조 및 전기화학적 특성
김한주,손원근,홍지숙,김태일,박수길,Kim Han-Joo,Son Won-Keun,Hong Ji-Sook,Kim Tae-Il,Park Soo-Gil 한국전기화학회 2006 한국전기화학회지 Vol.9 No.2
전해코팅 법과 dip-coating 법을 이용해 산화주석(IV)을 티타늄 지지체에 코팅하여, 코팅 방법에 따른 코팅 전극의 물성과 전기화학적 특성에 대해여 연구하였다. HCl 로 전극 에칭 후, nitrate 용액에 $SnCl_2{\cdot}2H_2O$을 용해시켜 pulse technique를 이용하여 전해코팅 하였으며, dip-coating 법 또한 $SnCl_2{\cdot}2H_2O$를 사용하여 1:1V% HCl 용액에 용해시켜 코팅 소결 후 산화주석(IV)코팅 전극을 제작하였다. 두 가지 코팅 방법을 통해 제작된 산화주석(IV)코팅 전극은 전극의 물성을 비교하기 위해 x-ray diffraction (XRD), scanning election microscopy (SEM)를 관찰해보았고, 전기화학적 특성을 평가하기 위해 cyclic voltammetry (CV)를 측정하여 전위창을 비교해 보았다. The study is coated tin(IV) oxide coated on the titanium substrate electrodes by electrodepositon and dip-coating method and studied about that physical and electrochemical characterization by coating methods. After titanium substrate is etched in HCl, electrodespotion is coated $SnCl_2{\cdot}2H_2O$ in nitrate solution by pulse technique, dip-coating method is also used $SnCl_2{\cdot}2H_2O$ in 1;1V% HCl and coated by dipping and annealing process. tin(IV) oxide coated on titanium substrate electrodes by two coating methods are studied x-ray diffraction (XRD), scanning electron microscopy (SEM) to compare physical characterization of electrode and potential window by cyclic voltammetry (CV) to observe electrochemical characterization.
서정권 ( Jeong Kwon Suh ),홍지숙 ( Ji Sook Hong ),이창하 ( Chang Ha Lee ),이정민 ( Jung Min Lee ) 한국공업화학회 2003 공업화학 Vol.14 No.2
왕겨를 출발 원료로 하여 제올라이트 X/활성탄 복합체(제오카본)를 합성하였으며, 합성된 복합체와 제올라이트 13X애 대한 H_2O의 흡착 특성을 비교 하였다. 실천을 통해 얻어진 흡착 등온선에 Langmuir-Freundlict, Muilt-BET 및 Excess suface Work (ESW) 모델을 적용 시켰다. 결과에서 알수 있듯이, 제오카본의 경우에는 Langmuir-Freundlich 모델을 적용했을 경우에는 313.15 K (1.39%), Multi-BET 모델의 경우에는 313.15 K (2.29%), ESW 모델 적응시는 353.15 K (0.47%) 온도에서 가장 작은 오차를 보여주었다. 제올라이트 13X외 경우에는 Langmuir-Freundlich 모델을 적용했을 경우에는 353.15 K (0.10%), Multi-BET 모델의 경우에는 313.15 K (0.65%), ESW 모델 적용시는 353.15 K (0.68%) 온도에서 가장 작은 오차를 보여주었다. 특히, ESW 모델은 Langmuir-Freuntdlich Mulit-BET model에 비해서 저압영역에서는 단분자충 흡착과 고압 영역에서는 capillary condensation 현상 등이 고려된 결과, 모든 온도와 압력 범위에서 잘 적용되었다. Zeolite X/activated carbon composite (zeocarbon) was synthesized from rice hulls. The adsorption equilibrium of H_2O on zeocarbon was compared with that of zeolite 13X, Langmuir-Freundlich, Excess Surface Work (ESW) and Multi-BET isotherm models were used to fit the experimental data of H_2O adsorption on zeocarbon and zeolite 13X. In the case of zeocarbon, the minimum error of 1.39% resulted when the Langmuir-Freundlich model was applied at 313.15 K. In the cases of Multi-BET and ESW models, the minimum errors were 2.29% and 0.47% at 131.15 K and 353.15 K, respectively. In the case of zeolite 13X, the minimum error was 0.10% at 0.68%, at 313.15 K and 353.15 K, respectively. ESW model was found to be in better agreement with the experimental values than Langmuir-Freundlich model or Multi-BET model. Considering that monolayer adsorption occurs in low-pressure region, while the capillary condensation phenomenon prevails in high-pressure region, ESW model fitted well under all the temperature and pressure conditions.
이부 비대칭 치료를 위한 새로운 이부 성형술의 소개 - 전환 이부성형술: 증례보고
서현수,이영주,변광섭,홍순민,박준우,홍지숙,박양호,Seo, Hyun-Soo,Lee, Young-Joo,Byeon, Kwang-Seob,Hong, Soon-Min,Park, Jun-Woo,Hong, Ji-Sook,Park, Yang-Ho 대한악안면성형재건외과학회 2011 Maxillofacial Plastic Reconstructive Surgery Vol.33 No.1
Conventional slinding genioplsty has the risk of mental nerve injury after operation and difficult to correct vertical asymmetry of chin. So, authors propose a new genioplasty to correct asymmetry of chin. Switching genioplasty is a modification method of conventional genioplasty. Between mandibular right and left canine, osteotomy line of triangular shape make until mandibular lower border. In large side, osteotome line of wedge shape is added to reduction. After osteotomy, segment of wedge shape was separated from chin. Distal segment was rotated to reduction side. Because of rotation of distal segment, space is made in opposite side. Seperated segement of wedge shape from large side is switched this space to fill. So, stability of distal segment is achieved. Authors applied to swiching genioplasty the patients who was remained the chin asymmetry after both sagittal split ramus osteotome was done because mandible asymmetry. After operation, patient and operator were satisfied with excellent esthetic results without any other complication. The switching genioplasty is effective surgical technique for chin asymmetry because it has more advantages than conventional sliding genioplasty. First, other donor side does not need for bone graft. Second, the switching genioplasty can reduce infection, bone resroption, dehiscence, capsular contraction after allograft. Third, have little mental nerve damage. Forth, anteroposterior correction is possible. Fifth, operation time is less than other genioplasty for chin asymmetry.