고농도 Manitol용액의 관류에 의한 흰쥐 뇌혈관의 미세구조의 변화

엄순길,김경용,이원복,김동창 대한해부학회 1993 Anatomy & Cell Biology Vol.26 No.4

재발한 가와사끼병(Kawasaki disease) 1례

길홍량,한헌석,하태선,이경희,박범수 충북대학교 의과대학 충북대학교 의학연구소 1995 忠北醫大學術誌 Vol.5 No.1

가와사끼병은 5세 미만의 영유아에서 호발하는 급성 전신성 혈관염으로 아직 원인이 밝혀지지는 않았으나 감염성질환 또는 자가면역질환 등으로 추정되고 있다. 1967년 일본의 Tomisaku Kawasaki에 의해 처음 보고되었으며 국내에서도 많은 증례보고가 있어왔다. 가와사끼병은 발열, 발진, 안결막 충혈, 사지말단의 변화, 구강과 입술의 변화, 경부 림프선증 등을 특징으로 하며, 치료로는 면역글로블린의 대량 정주요법과 아스피린이 사용되고 있으며 합병증에는 관상동맥류를 비롯한 심혈관질환이 있고 이로 인한 사망율이 1-2%정도인 것으로 보고되고 있다. 이 질환의 재발은 드문 것으로 되어 있고 일본의 한 보고에 의하면 2-3%로 추정된다. 환아는 6세 남아로 14개월 전 처음 가와사끼병으로 진단받고 감마글로블린과 아스피린을 투약 받았고 당시 심혈관질환은 없었으며 본원 내원시에는 발열, 발진, 안결막 충혈, 붉고 갈라진 입술, 좌측 림프선병증과 손, 발의 부종이 있어 가와사끼병의 진단기준을 만족하였다. 환아는 역시 감마글로블린과 아스피린으로 치료받고 증세가 호전되었으며, 심초음파 검사상 관상동맥의 확장이나 관상동맥류의 증거는 없었다. 저자들은 가와사끼병의 재발 1례를 경험하였기에 보고하는 바이다. Kawasaki disease, acute systemic vasculitis, that usually occurs in infant and young children. The etiology is unknown, but is supposed to be infectious disease or autoimmune disease. Kawasaki disease was first reprted by Tomisaku Kawasaki at 1967 and then many cases have been reported in Korea. Kawasaki disease was characterized by fever, rash, conjunctival injection, changes of extremities, changes of oral cavity and lips, lymphadenopathy and has been treated with intravenous gammaglobulin and aspirin. The complications are cardiovascular lesions including coronary aneurysm and coronary thrombosis. Mortality is approximately 1-2%. Recurrence is rare and 2-3% in Japanese reports. A 6-year-old boy presented with the fever, rash, conjunctivitis, red fissured lips, left lymphadenapathy, and hands and feet edema. He had been treated with intravenous gammaglobulin and aspirin for Kawasaki disease 14 months ago. At that time, he didn't have cardiovascular lesion. He was also treated with intravenous gammaglobulin and aspirin at this episode. We didn't detect coronary artery dilatation or coronary aneurysm. So, authors report a case of recurrent Kawasaki disease.

위상수학에 관한 연구 : 리이만다양체에서의 임계사상에 관하여 On the Critical Mappings of the Riemannian Manifolds

전길웅,강명경 충남대학교 자연과학연구소 1982 忠南科學硏究誌 Vol.9 No.1

There are many defined functional on the space of smooth maps of one Riemannian manifold to another. Maps that are critical for every defined functional are called critical. This paper shows that the fibers of critical maps are minimal submanifolds. Also, it provides a characterization of hypercritical maps and shows that the inverse of the hypercritical map is hypercritical.

남·서해의 계절 순환과 여름철 난류수의 서해 유입

현경훈,방익찬,노홍길 제주대학교 해양연구소 1996 해양자원연구소연구보고 Vol.20 No.-

In order to study on the seasonal circulation in the South and West Seas of Korean Peninsula and the inflow of warm waters into the West Sea(eastern Yellow Sea) in summer, water mass analysis is used with temperature and salinity data observed by National Fisheries Research & Development Agency du-ring 1970~1990. In the West Sea, warm waters are majorly mixed by the mixing rate of 40~60% in summer, while cold waters are dominant in winter. In the central region of the Yellow Sea. warm waters are distributed linked with the northwestern sea of Cheju Islands in winter but cold waters are distribu-ted in the lower layer in summer. The reverse of water mass distributions in winter and summer could be explained only by the seasonal circulations. In winter, warm waters are intruded to the central region and cold waters flow southward along the west coast of Korea. In summer, warm waters flow northward along the west coast of Korea and cold waters flow southward in the central region. Therefore, Yellow Sea Warm Waters can be defined as the northward flow of warm waters toward the central region of the Yellow Sea in winter and along the west coast of Korea in summer.

제주해협의 해류와 월별 유량변화

노홍길,방익찬,김상현,현경훈,김준택,양영진,홍창수 제주대학교 해양연구소 1997 해양자원연구소연구보고 Vol.21 No.-

Currents are measured in the Straits of Cheju by detecting surface buoy tracks and mooring current meters in 1996-1997. As a result, north-eastward currents are decteted in the Straits of Cheju all the year round, which is weak in spring and strong in summer and fall. Average speeds of 20 cm/s to the east. 7 cm/s to the north and 22 cm/s to the north-east appeared in the surface. Currents are fast in the middle of the strait and slow near Cheju Island. East-west components of the currents are about 3 times faster than the north-south ones. Also. it is shown that surface buoys released within the distance of 6 miles away from Cheju do not drift out of the Straits of Cheju because of tongue-like warm waters appeared in the eastern entrance of the strait. Volume transports calculated by geostrophic calculation are shown to be 0.05-0.2 Sv in winter and 0.4-0.5 Sv in summer.

Phytochrome이 보리잎 Protoplast의 팽윤에 미치는 영향

홍경애,송성준,송필순,유장걸,문두길 제주대학교 방사능이용연구소 1986 연구보고 Vol.2 No.-

암조건에서 생육시킨 보리(Hordeum valgare)잎의 생장점 부근에서 분리한 Protoplast가 적색광 처리에 의해서 팽윤되었고 적외선광에 의해서는 적색광 효과과 소멸되었다. 이 사실은 Protoplast의 팽윤이 Phytochrome에 의해서 조절됨을 시사하는 것이나 Phytochrome의 작용기작을 알기 위해서는 다각적인 연구가 필요하다. 실험결과로 부터 적색광 처리시간은 2분 적색광 처리후 배양시간은 2시간이 적당함을 알았다. Protoplast 배양액의 Sorbitol 농도에 따른 크기변화는 농도가 낮을수록 커졌으며 0.4M 이하에서는 Protoplast가 파괴되었다. Light effect on the size of protoplasts isolated from etiolated barley leaves was studied. Red light irradiation caused a swelling of protoplasts while little change in size found under the dark condition. Photoreversibility by red light and far-red light was found in protoplast swelling, indicating the involvement of phytochrome. Action mechanism of phytochrome on protoplast swelling should be clarified in aspect of growth regulators and intermediates involved. Two minute irradiation time and two hour incubation after red light treatment were found sufficient to induce protoplast swelling. The protoplasts were swollen according to the sorbitol concentration of incubation media but destroyed below 0.4M-sorbitol concentration.

소흑산도 주변해역의 계절별 난류수의 분포

오경희,방익찬,노홍길 제주대학교 해양연구소 1998 해양자원연구소연구보고 Vol.22 No.-

정상 및 당뇨병 환자에서 포도당 정주에 따른 혈중 포도당과 인슐린 반응에 관한 연구

임경호,구도서,유동준,최영길 대한의학협회 1990 대한의학협회지 Vol.33 No.9

CO₂레이저빔에 의한 이종재질 및 이종두께의 Tailored Blank 용접에 관한 연구

이경돈,유병길,김도훈,황창선 한국레이저가공학회 1999 한국레이저가공학회지 Vol.2 No.3

This research was conducted as a fundamental study to apply tailored blank welding technique into automotive production process. The materials used in this study were 2.0mm thickness low carbon steel sheets and 1.2mm Zn-coated low carbon steel sheets. To ensure the reproducibility and to consider various factors, experiments were conducted by applying Taguchi experimental method with 6 factors. Every welding process was repeated 3 times to offset the effect of uncontrolled factors. Elongation and LDH(Limited Dome Height) were measured to evaluate formability of specimens and Optical microscopy, XRD, SEM, and EDS analysis were performed to observe the microstructures and to determine the solidification mode in the weld. The elongation of specimen welded with optimum condition was 83% of base metal, and LDH was 84% of base metal. In case of laser treated specimen where Zn coating was removed, elongation was 85% of base metal, and LDH was 85% of base metal. In fusion zone, phases were consisted of quasi-polygonal ferrite, banitic ferrite, and martensite.

자기공명영상용 라디오주파수 코일의 제작에 있어서 동조 및 매칭에 영향을 미치는 전기 용량 값들의 실험적 측정

양경승,신용진,김영섭,한재진,이성길,김승국,김영근,지연상 조선대학교 기초과학연구소 2003 自然科學硏究 Vol.26 No.-

Radio frequency coil which is capable of transmit and receive the signal has been used for image production in magnetic resonance imaging(MRI). Tuning and matching characteristic of radio frequency coil is major factor determining the image quality. In experiment the used coil was called a staircase type coil which is simplified the birdcage coil and referred to a simple LC resonant circuit. Because the inductance values of the coils are fixed coil performance was examined by changing of the capacitance values. In this study capacitance values were experimentally determined to increase of-tuning and matching effect in junction of the coil between coil endring and BNC cable to obtain the high quality of image.