기관골 신생증 1예

오영상,이은우,정종혁,문승원,김수현,김동한,양혁승,박정환,박경옥,강성수,이영직 朝鮮大學校 附設 醫學硏究所 2006 The Medical Journal of Chosun University Vol.31 No.2

Tracheobronchopathia osteoplastica is a rare disorder of unknown cause characterized by the projection of numerous bony or cartilaginous submucosal nodules into the tracheobronchial lumen with sparing of the posterior membranous portion of tracheobronchial tree. In the past, most of the cases were diagnosed as secondary finding at autopsy. Nowaday, the key component of the evaluation is flexible fiberoptic laryngoscopy and bronchoscopy, which typically demonstrates irregular spicules of subrnucosal bone and cartilage projecting into the tracheobronchial lumen and causing various degrees of airway obstruction. A 45 years old man was visited Sunchon St. Carollo hospital due to discomfort on throat. We saw several nodules just below vocal cord via laryngoscope. The computed tomography revealed multiple small calcified nqdules on trachea and both main bronchi. Pathologic finding of bronchoscopic biopsy showed abnormal proliferation of bony and cartilagious nodules in the tracheal submucosa. These fingdings were consistent with tracheobronchopathia osteoplastica. We report here on a case of tracheobronchopathia osteoplastica with review of literature.

Ring-on-ring 강도시험법을 이용한 200mm 반도체 실리콘 웨이퍼의 파괴강도 분석

정성민,박성은,오한석,이홍림 연세대학교 산업기술연구소 2000 논문집 Vol.32 No.2

Biaxial fracture strength of the commercial 200mm Czochralski single crystal silicon wafer was measured by the ring-on-ring technique and was compared with theoretical strength of Si single crystal. The ring-on-ring apparatus was newly designed and manufactured after analyzing stress distribution in ring-on-ring test with FEM(Finite Element Method) computerized simulation. Weibull modulus of the silicon wafer was also calculated from the measured fracture strength.

Young의 간섭실험에서 이중슬릿 앞에 놓인 단일슬릿의 기능에 대한 연구

정성오,김학수 釜山大學校 師範大學 科學敎育硏究所 2009 科學敎育硏究報 Vol.36 No.-

A double-slit experiment was done by using two kinds of single-slits. The light sources were a halogen lamp, Na-lamp and sun light. The interference fringes were observed by photographing the fringes on the screen and exposing a film on the screen position without lens of the camera. The visibility was better when the width of the single-slit was narrower. The distance between the single-slit and the double-slit was varied. As they were closer, the visibility was decreased. In the experiment using a prism, we could observe the interference patterns of all wavelengths in one picture. From this experiment we can suggest that this experiment might be used in the introductory physics laboratory for understanding interference and diffraction of light.

無等山 標高에 따른 季節別 昆蟲相에 關한 硏究(Ⅰ) : -春季分布相-

丁聖淑,金美蓮,金奎眞,吳貞子 全南大學校 農漁村開發硏究所 1992 農業科學技術硏究 Vol.27 No.-

無等山 標高에 따른 季節別 昆蟲相을 調査하기 위해 1991-1992年 2個年에 걸쳐 調査한 結果를 要約하면 다음과 같다. 1. 無等山의 봄에 分布하는 昆蟲種類는 總 10目 39科 120種이 調査되었다. 2. 標高別 調査에서는 100-500M에서 10目 37科 110種이, 500-900m에서는 9目 35科 101種이, 900-1200m에서는 5目 12科 18種이 調査되었다. 3. 표고에 따른 출현빈도가 높고 발생량이 많은 種은 100-500m 에서는 흰나비科의 줄흰나비(Artogeia napi), 배추흰나비 (Artogeia rapae), 배추흰나비 (Artogeia rapae), 네발나비科의 청띠신선나비 (kanisha canace), 애기세줄나비 (Neptis dsppho), 풍뎅이科의 검정풍뎅이 (Holotrichia kiotensis), 꿀벌科의 꿀벌(Apis melica), 뒤영벌科의 어리호박벌(Xylocopa appendiculata)로 밝혀졌고, 500-900m 사이에서는 네발나비科의 애기세줄나비(Neptis dssppho), 허리노린재科의 큰허리노린재(Molipteryz fulignosa), 집게벌레科의 노란다리민집게벌리(Euborellia pallopes), 꿀벌科의 꿀벌(Apis melifica)이었고 900-1200m에서는 부전나비科의 부전나비(Pelbejus angus), 꿀벌科의 꿀벌 Apis melifica), 길앞잡이科의 아이누길앞잡이(Cicindela gemmata)等이었다. 4. 무등산 정상인 1,000-1,200m 지대에서 봄에만 볼수있는 종으로서 호랑나비科의 이른봄애호랑나비(Luehdorfia puzilor), 흰나비과의 갈고리나비(Anthocharis scolymus) 2種이 관찰되었다. This study was carried out to investigate the insects fauna of Mt. Mudeung in spring season from 1991 to 1992. The results obtain summaries as follows. 1. The total of 120 species belongs to 39 families of 10 orders were investigated. 2. In different sea levels,10 orders 37 families 110 species at 100-500m. 9 orders 35 families 101 species at 500-900m and 5 orders 12 families 18 species at 900-1200m in sea level investigated respectively. 3. High grequency and population density of Insects by sea level were investigated : Artogeia rapae, Kanisha canace, Neotis dspho, Holotrichia kiotensis, Apis melifica and Xylocopa appendiculata in 100-500m. Plebejus angus, Apis melifica and Cicinedela gemmata in 900-1200m above sea level. 4. Both species of Luehdorfia puzilor and Anthocharis solymus were observed at 1000-1200m of Mt.Mudeung as species appeared only spring season.

TiO₂분말의 현탁액에서 광에 의한 수소와 과산화수소의 생성에 관한 연구

오형식,성정섭 木浦大學校基礎科學硏究所 1985 基礎科學硏究誌 Vol.3 No.-

TiO₂/water suspension에 UV광을 조사하여 생성되는 H₂와 H₂O₂를 연구했다. H₂와 H₂O₂의 생성속도는 GC와 요오드 적정법으로 측정했다. 여기서는 반도체의 양을 세가지로 나누어 실험한 결과 H₂의 극한속도는 조사시간이 약 2시간일때 였고 H₂O₂의 극한농도는 3시간 이후 일때 였으며 시간이 증가 할 수록 점차로 O 에 접근함을 알 수 있었다. H₂와 H₂O₂의 생성에 대한 양자효율은 각각??과 ??이었다. Photosynthetic generation of H₂and H₂O₂is demonstrated on UV-irradiated TiO₂/water suspensions. The rate of H₂and H₂O₂generation were monitored by a combined analytical-gas chromatographic procedure as a function of irradiation time and solid content. The rate of H₂evolution of TiO₂for three levels of solid content in the reaction mixture. A limiting rate of H₂generation is attained after∼2h of illuminations. This limiting rate is directly proportional to the concentration of TiO₂. A limiting concentration of H₂O₂is attained after ∼3th of illumination, and concomitantly the rate drops gradually to zero. The apparent quantum yields for generation of H₂and H₂O₂on TiO₂were calculated to be ?? and ??, respectively.

단결정 n-TiO₂광전극에 대한 Flatband Potentials와 Mott-Schottky 그림

오형식,성정섭 木浦大學校基礎科學硏究所 1986 基礎科學硏究誌 Vol.4 No.-

단 결정 TiO₂양극에 대한 표면제조 처리는 이상적인 Mott-Schottky 그림이 보인 바와 같이 매우 작은 주기분산을 나타냈다. Rutile boules의 세 형태(Prism, Al-free, optical grade)에서의 실험은 flatband potential에서 현저한 차이를 나타냈다. Prism grade, optical grade와 Al-free에서의 pH에 대한 flatband potential의 의존성은 각각 65, 62, 58mV/pH Unit였다. 즉, prism grade와 Al-free에서의 flatband potential의 차는 pH=1.0 에서 50mV, pH=12.1에서 160mV였다. 마지막으로 특별히 처리된 TiO₂시료는 전해질의 농도가 1.1M일때 이상 적인 Mott-Schottky 그림이 나타났으며 전해질의 농도가 0.25M보다 작으면 큰 주기 분산효과를 나타냈다. We have found a surface preparation treatment for single crystal TiO₂ photoanodes that produces ideal Mott-Schottky plots showing very little frequency dispersion. The special preparation procedure permitted precise determination of flatband potentials, and experiments with three types (prism grade, optical grade, and Al-free) of rutile boules showed significant difference in their flatband potentials. The average pH dependence of flatband potential for prism, optical grade and Al-free boules were 65, 62, 58mV/pH unit, respectively. For the prism grade and Al-free boules this represented flatband potential differences of 50mV at ph=1.0 and 160mV at ph=12.1. Finally, we observed that the specially treated TiO₂samples would only yield ideal Mott-Schottky plots if the concentration of the electroyte was about 1M. The use of electrolyte concentrations less than 0.25M produced large frequency dispersion effects.

초등학교 화단에 대한 교사들의 인식과 운영실태에 관한 연구

김오성,정연옥,박중춘 韓國植物ㆍ人間ㆍ環境學會 2001 인간식물환경학회지 Vol.4 No.3

The purpose of this study was to provide basic data for inquiring effective use of school garden by researching the recognition and practical management on school garden of elementary school teachers. The teachers recognized that school garden was contributing to students' emotional cultivation, cultural learning and feeling on importance of life. The more teaching career recognized that school garden was a great help to students on learning attitude. The teachers recognized that the garden structure and plants, planting design were in harmony. Teachers have more than 31 teaching years recognized that they knew kinds of plants in school garden well. The more teaching career were more interest in practical classes in school garden. When panting trees or flowers in a school garden, teachers thought their opinions were considered well. Especially female teachers in thirties and having teaching career between 11 years and 20 years recognized that acceptance degree of their opinions was very high. Most of teachers recognized that they knew considerably the name of plants in school garden, especially female teacher and the lower career teacher were so.

혼합 치열기 어린이의 치은 섬유종증

한효정,최병재,김진,김성오,손홍규 大韓小兒齒科學會 2004 大韓小兒齒科學會誌 Vol.31 No.4

치은 섬유종증은 유리 치은과 부착 치은이 점진적으로 증식되는 비염증성 질환이다. 대부분 가족력이 있으며 영구치 맹출과 함께 발병하지만 유치 맹출 시기에, 드물게 출생 시부터 나타나기도 한다. 본 6세 여아의 경우 태어날 때부터 치은의 일부가 증식되어 있었고 가족력 및 치은 증식을 유발하는 약물을 복용한 병력은 없었다. 구강 내 검진 시 섬유성 치은 증식이 관찰되어 절제 생검을 시행하였고 그 결과 치은 섬유종증으로 진단하였다. 치은 섬유종증의 치료는 치은 절제술과 철저한 구강 위생의 관리이다. 그러나 치료 후 재발성 때문에 치료 시기에 대해서는 논란 중이다. 일반적으로 영구치가 모두 맹출 한 이후에 치료할 것을 추천하지만 조기 치료는 구강의 기능 및 환아의 심미적, 심리적인 문제점을 개선시켜 주는 장점이 있다. Gingival fibromatosis is a non-inflammatory oral disease, characterized by slowly progress enlargement of the free and attached gingiva. Gingival fibromatosis may have familial tendency. Gingival enlargement usually begins with the eruption of the permanent dentition but can also develop with the eruption of the primary dentition. In this case, a 6-year-old female had gingival enlargement at birth. There was no familial, medical and pharmacologic history of gingival overgrowth. Treatment is gingivectomy with a rigorous program of oral hygiene. Recurrence of gingival fibromatosis may well be inevitable. Therefore there is no general aggrement as to the timing of surgical intervention. Generally the best time is when all the permanent teeth have erupted. However early intervention can improve oral function and esthetic and psychologic effect.

Pseudo-Gitelman씨 증후군 1예

김성렬,조영일,이해운,이정연,안해련,송종오,명승운 건국대학교 의과학연구소 2002 건국의과학학술지 Vol.12 No.-

Gitelman's syndrome is a rare disorder with a characteristic set of metabolic abnormalities. These include hypokalemia, metabolic alkalosis, hypocalciuria and hypomagnesemia. The clinical manifestations of Gitelman's syndrome are very similar with those of Bartter's syndrome and diuretic abuse. Gitelman' syndrome and Bartter's syndrome can be distinguished by renal clearance study after administration of furosemide and thiazide, since the primary defect in each of these disorders is an impairment in sodium reabsorption in the distal tubule and loop of Henle, respectively. Pseudo-Bartter's syndrome due to diuretic abuse can be distinguished by history of diuretic use and a positive urine assay for diuretics. We have experienced a case of pseudo-Gitelman's syndrome in 56-year old woman with unexplained hypokalemic metabolic alkalosis, hypocalciuria, and hypomagnesemia. The patient denied ingestion of diuretic medication. The results of renal clearance study using furosemide and thiazide in this case suggested the presence of the primary defect of sodium reabsorption in the distal tubule rather than in the loop of Henle. These clinical and laboratory findings were consistent with those of Gitelman's syndrome. But, this case was confirmed as pseudo-Gitelman's syndrome since diuretics were detected by a urine assay for diuretics. Furosemide and hydrochlorothiazide were contained in the pill that she had been taking due to constipation. Herein, we report the case of pseudo-Gitelman's syndrome by abuse of cathartics containig diuretics presented as Gitelman's syndrome in renal clearance study.

보존적 치료로 회복된 망경색에 의한 급성복증 1예

김정념,이숭환,김정식,김진호,배윤오,박성규,윤상정,한현영,이헌영 충남대학교 의과대학 의학연구소 2003 충남의대잡지 Vol.30 No.1

Omental infarction, the end result of impaired perfusion to the greater omentum, is a rare benign self-limiting clinical entity. The main clinical symptom is non-specific localized abdominal pain with a moderately raised white blood cell and erythrocyte sedimentation rate. These findings often mimic an abdominal surgical emergency. This condition is often misdiagnosed as acute appendicitis or cholecystitis. The characteristic feature of CT scan and ultrasonography provide non-invasive diagnosis in most patients with omental infarction. We report a case of patient whose CT scan showed the characteristic finding of omental infarction. The patient was improved spontaneously only with conservative care.