http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
기상 증착된 비정질 실리콘 카바이드 박막질의 기판 온도 의존성
김주영,이백우,남호석,권동일 대한금속재료학회 2004 대한금속·재료학회지 Vol.42 No.3
The dramatic variations in structure and internal stress in an amorphous silicon carbide film (a-SiC) induced by forming process have been reported extensively. Vapor-depositions of a-SiC film were simulated by molecular dynamics simulation employing the Tersoff potential. To understand effect of substrate temperature that is one of the most important factors involved in the changes in structure and intrinsic stress, the vapor-depositions at various substrate temperatures (500-2500 K) were performed. Then, the MD simulations of cooling to 298 K were carried out. For both cooled and as-deposited a-SiC films, the analyses of structure and internal stress with deposition process parameters entailed the calculation of density, chemical order, and in-plane stress [(σ_(xx)+σ_(yy))/2].
Cadmium Chloride가 Mouse 의 췌장도 β-세포에 미치는 영향
전영희,백태경,정호삼,이규식,김영호 한양대학교 의과대학 1993 한양의대 학술지 Vol.13 No.1
As the industrial use of cadmium has become more common, the question of its toxicity has become more important. The present was undertaken to study effects of cadmium on the structure of β-cells in the Langerhans islet of the mouse pancreas. Healthy mice of ICR strain weighing around 39gm were used in this experiment. The each animal of the experimental group was interperitoneally administrated cadmium chloride 5.0mg/kg diluted in the water for injection. The experimental animals were sacrified at 3, 6, 12, 24, 48 and 72 hours after administration of cadmium chloride and pancreatic tissues was excised. Some specimens were stained with Halmi stain to observe the morphological changes in the endocrine portion of the pancreas, the islet of Langerhan, and the others were prefixed in the 2.5% glutaraldehyde-2% paraformaldehyde phosphate buffer solution (pH7.0) and postfixed in the 1% osmic acid. Ultrathin sections were made and double strained with uranyl acetate and lead citrate. These preparations were observed with light microscope and electron microscope as well. The results obtained were as follow; 1. The number of β-cells throughout the pancreatic islets were markedly reduced in the 12 hours group and the β-cells were increased slowly in the 24 hours group. 2. The cristae of mitochondria disappeared and electron-density of matrix in mitochondria is decreased in the 3 hours after treatment of animals with cadmium chloride. The mitochomdria appeared almost like normal group, in the 12 hours group. 3. The cisternae of rough endoplasmic reticulum were dilatated in the 3hours group and change in rough endoplasmic reticulum were completely restored to normal in the 24 hours group. 4. The Golgi complexes were very hypertophied in the 3 hours. The Golgi complexes were observed like normal group, in the 12 hours group. 5. The sectetory granules were hypertrophied a halo and loss a dense core and the electron dense core and the electron dense of core in secretory granules decreased in the 3 hours, 12 hours group. But the secretory granules were slightly restored in the 48 hours group and appeared almost like normal group in the 72 hours group. Consequently, it is concluded that cadmium chloride exerts several toxic effects to β-cells of Langerhan's islet, especially, the damage to secretory granule in mouse.
위암종과 Epstein-Barr 바이러스와의 연관성에 대한 연구
심광용,김호영,김효열,백순구,권상옥,조미연,이창훈,이종인 건국대학교 의과학연구소 2004 건국의과학학술지 Vol.14 No.-
Objectives: Epstein-Barr virus (EBV) has been known to be linked to a spectrum of neoplastic conditions, including nasopharyngeal carcinoma, Burkitt's lymphoma, peripheral T-cell lymphoma and Hodgkin's disease. This study aims to investigate the association of EBV with gastric carcinoma in Korea. Methods: Fifty-three cases of gastric adenocarcinoma were studied for evidence of EBV infection by EBV-encoded small RNA (EBER) in situ hybridization (ISH) on the paraffin sections and amplifying the EBV genome encoding envelop glycoprotein (gp220) with polymerase chain reaction (PCR) in fresh gastric cancer specimens. Results: EBER was detected in 7 (13.2%) of 53 gastric carcinomas and all cases were male. In 6 (85.7%) of 7 EBER-positive cases, the tumors were located in the upper and middle part of the stomach. EBER ISH study showed strong positivity in all the tumor cells, but negativity in surrouning lymphocytes, stromal cells and normal gastric mucosa. DNA PCR was positive in 23 (43.4%) of 53 gastric carcinomas, including all of 7 EBER-positive cases. Conclusion: We could observe some association of EBV with gastric carcinoma, and our findings about the charateristics of EBV-positive gastric cancers involving sex, site and histological type are similar to those in Japan. However, EBV-positive rate of gastric cancer is higher than in Japan and lower than in Western countries. Further studies to elucidate oncogenic mechanism of EBV in gastric cancer should be performed.
최남홍,곽호윤,송백용,배상욱,이인묵,김도현 대한골절학회 2003 대한골절학회지 Vol.16 No.3
목적: 이번 연구의 목적은 보조기를 이용하여 최소 전위된 족관절 외과 골절의 보존적 치료 결과를 알아보는 것이다. 대상 및 방법: 11명 (11예)의 환자들이 수상 후 8주간 전 체중 부하 보행으로 보존적 치료를 받았다. 적응증으로는 3㎜ 이하의 골절 전위, 내과 부분의 동통과 부종이 없거나 있어도 미약한 경우, 거골의 외측 전위가 없는 경우로 삼았다. 환자들은 AOFAS (the American Orthopedic Foor and Ankle Society) Ankle-Hindfoot Scale에 의해 평가받았다. 결과: 평균 103주 (36~192주)의 추시 관찰을 하였으며, 전례에서 발목 관절의 운동 범위는 정상이었다. 평균 AOFAS Ankle-Hindfoot Scale 점수는 95점이었다. 결론: 보조기를 이용한 보존적 치료의 장점은 조기에 전 체중 부하 보행을 하며 일상생활 및 사회생활을 영위할 수 있다는 것, 환자의 편안함, 그리고 재활 치료 기간의 단축이었다. 그러므로 최소 전위된 족관절 외과 골절에 보조기를 이용한 보존적 치료는 권할만하다. Purpose: The purpose of this study was to evaluate the outcome of conservative treatment for minimal displaced lateral mallolar fracture using ankle brace. Materials and Methods: Eleven patients (eleven ankles) underwent conservative treatment with ankle brace for 8 weeks with full weight bearing ambulation. Inclusion criteria were minimal displacement (<3㎜) of fracture, no or mild tenderness or swelling on medial malleolar area and no lateral shift of talus. The patients were evaluated with AOFAS (the American Orthopedic Foot and Ankle society) Ankle-Hindfoot scale. Result: Average follow up was 103 weeks (36~192). All cases had normal range of motion of ankle. The average score of AOFAS Ankle-Hindfoot scale was 95 points. Conclusion: The advantages of conservative treatment with ankle brace were early return to daily activity and work, comfort to the patients and a short period of rehabilitation. Conservative treatment with ankle brace for minimal displaced lateral malleolar fracture is recommended.