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자체촉매로 성장된 주석 도핑된 인듐산화물 나노선의 모폴로지 조절
김수호,김도형,노용석,도중회,이의완,이일수,이형락,장훈식 한국물리학회 2007 새물리 Vol.55 No.5
In this report, we investigate the in-situ doping and morphology control of self-catalytic Sn-doped indium-oxide nanowires. The oxygen exposure during the growth affects the morphology of the nanowires, needled-like an pin-like structures. For longer of growth times, branched nanowires were epitaxially grown perpendicular to the backbone nanowires due to the self-catalytic VLS mechanism. Our approach has potential for extension to other nanowires of binary or ternary metal oxides grown based on self-catalytic growth. 본 논문에서는 자체촉매로 성장된 주석 도핑된 인듐 산화물 (ITO) 나노선의 실시간 도핑 및 모폴로지 조절에 대해 연구하였다. 나노선 성장 시 산소의 추가는 침구조 (needle-like) 및 핀구조 (pin-like)와 같은 나노선들의 모폴리지에 영향을 미쳤다. 성장시간이 지남에 따라 먼저 성장된 기둥 나노선에 수직하게 가지 (branch) 나노선들이 에피성장 되었다. 본 연구결과는 자체촉매작용에 의한 삼상 (ternary) 산화물 나노선의 성장에 효과적으로 이용 될 수 있을 것이다.
김수호,정동진,여동명,손동완,한성태 대한영상의학회 2015 대한영상의학회지 Vol.73 No.3
Emphysematous pyelonephritis (EPN), caused by extracorporeal shock wave lithotripsy (ESWL), has not been reported in the literature; and the mechanism of this disease is unknown. Although many studies have conjectured about the various causes of EPN, ESWL was not one of them. The patient in this report was a 65-year-old woman with a past medical history of diabetes; the patient underwent an ESWL that caused the EPN. To the best of our knowledge, this is the first report of an EPN case that was caused by ESWL.
햄스터에서 전염된 것으로 생각되는 Microsporum canis 에 의한 백선종창 1예
김수호,서무규,김재홍,하경임,김정란 대한의진균학회 2009 대한의진균학회지 Vol.14 No.1
Kerion celsi is an inflammatory type of tinea capitis. It is usually seen with zoophilic pathogens, with common examples being Microsporum(M.) canis, Trichophyton(T.) mentagrophytes and T. verrucosum. Hamster is the mammal which belongs to the rodent family, usually small in size and frequently nocturnal in their habits and small pet kept in many countries today. We report a case of kerion celsi caused by M. canis probably transmitted from hamster in a 8-year-old boy. The patient had various sized, erythematous boggy nodules and pustules with irregular hair loss on the scalp for 2 months. Culture from a scalp lesion of patient on Sabouraud's dextrose agar showed M. canis. He was treated with 125 mg of terbinafine daily for 12 weeks and short term therapy of low dose of prednisolone. Skin lesions were cured without recurrence. Kerion celsi is an inflammatory type of tinea capitis. It is usually seen with zoophilic pathogens, with common examples being Microsporum(M.) canis, Trichophyton(T.) mentagrophytes and T. verrucosum. Hamster is the mammal which belongs to the rodent family, usually small in size and frequently nocturnal in their habits and small pet kept in many countries today. We report a case of kerion celsi caused by M. canis probably transmitted from hamster in a 8-year-old boy. The patient had various sized, erythematous boggy nodules and pustules with irregular hair loss on the scalp for 2 months. Culture from a scalp lesion of patient on Sabouraud's dextrose agar showed M. canis. He was treated with 125 mg of terbinafine daily for 12 weeks and short term therapy of low dose of prednisolone. Skin lesions were cured without recurrence.
항산화 필터 제조 및 주류연중 free radicals 제거 효과
김수호,차성제,심원택,정봉수,서만석,송인범,장행현,신창호,김종열,김정열,최윤주,Kim, Soo-Ho,Cha, Sung-Je,Shim, Weon-Tack,Cheong, Bong-Su,Seo, Man-Seok,Song, In-Beom,Jang, Hang-Hyun,Shin, Chang-Ho,Kim, Jong-Yeol,Kim, Chung-Ryul,Choi, Yoo 한국연초학회 2009 한국연초학회지 Vol.31 No.1
This study describes the manufacturing method of antioxidant filter and evaluate the reduction of free radical and biological activity from mainstream smoke. When we used spray-brush for the application of antioxidant solution to the filter, cv(coefficient of variation) levels of antioxidant added to filter ranged within 3 %, which means stable and constant feeding process. 0.3~0.5mg per cigarette of antioxidant were sprayed to acetate and active carbon part in the filter plug, respectively. It was considered that the use of antioxidant added filter resulted in the reduction of the gaseous compounds of free radicals from 17 % to 19 % in the mainstream smoke. Variation for removal efficiency of free radical in antioxidant filter added to acetate part was more pronounced than that of filter added to active carbon part. Smoking deliveries of tar, nicotine for the antioxidant added filters were similar when comparing to the non-antioxidant added filter, but the delivering amounts of isoprene were significantly reduced. The estimation of consumed GSH(glutathion) showed that the gaseous toxicity of the antioxidant added filter was 14 % ~ 23 % lower than that of non-antioxidant added filter. No significant differences were observed for the total taste quality in sensory evaluation.
김수호,윤영수,고재환,지승현 한국물리학회 2006 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.49 No.1
AlN thin films are deposited by using RF reactive magnetron sputtering at room temperature to investigate the possibility of AlN/IDT/Si surface acoustic wave structures with single and double interdigital transducer (IDT) patterns. Of the AlN films with different deposition conditions, the as-deposited AlN film at an RF power of 300 W and a working pressure of 5 mTorr has the most highly textured structure. Its textured structure is indicated by the following characteristics: the narrowest full width at half maximum (FWHM) of the X-ray diffraction (XRD) -rocking curve, namely, 1.52, and a high intensity value of the (002) plane of the wide-angle XRD pattern. The as-deposited AlN film at working pressure of 20 mTorr shows a relatively wide FWHM, 2.41, and a low intensity value for the (002) plane of the wide-angle XRD pattern, thereby indicating a structure with a low degree of texture. The grains of the as-deposited films have almost the same sizes and shapes at various working pressure. In the frequency response measurements, better frequency properties are observed in the as-deposited AlN film at a working pressure of 5 mTorr. For example, the band width of the as-deposited AlN film at a working pressure of 5 mTorr is 12.5 MHz, which is larger than the theoretical value; in contrast, the band width of the as-deposited AlN film at a working pressure of 20 mTorr is 12.8 MHz. From the frequency response analysis, the grain boundary is found to affect the electromechanical coupling factor and the insertion loss. These results indicate that a high-performance AlN/IDT/Si device might be possible if a much better textured or epitaxial AlN film with a high grain boundary quality can be deposited on an IDT/Si substrate.