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總膽管 結紮에 의한 膽管增殖性 變化의 超微形態學的 硏究
張大聖,郭精植,孫泰重 慶北大學校 醫科大學 1987 慶北醫大誌 Vol.28 No.2
저자는 증식된 신생담세관 상피세포 기원을 초미형태학적으로 규명하기 위해 체중 250gm 정도의 Sprague-Dawley계 흰쥐 수컷의 총담관을 결찰한 후 간조직을 2, 4, 6 및 8주에 각각 3마리씩 광학현미경과 전자현미경적으로 관찰하였다. 광학현미경적으로는 증식된 담세관의 상피세포들 사이에서 간세포와 같은 형태를 가진 상피세포들이 있었다. 전자현미경적으로는 첫째, 기저막에 둘러싸인 담세관 상피세포의 일부는 RER 및 mitochondria가 풍부하고 세포질의 전자밀도가 높아 그 미세구조가 간세포와 매우 유사했으며, 둘째, 담세관의 내강을 공유하는 간세포의 일부에서 불완전하나 기저막이 형성되었으며, 세째, 세포소기관의 발달로 보아 간세포와 담세관 상피세포의 중간구조를 가진 세포들이 있었다. 이러한 소견들은 간세포가 담세관 상피세포로 이행하는 중간세포의 존재를 강력히 시사해 주며 따라서 담세관의 증식시에 신생상피세포는 담관이나 담세관 상피세포 뿐만 아니라 간세포에서도 유래될 것이라고 생각된다. The author studied ultrastructural changes on the proliferated bile ductules after ligation of common bile duct. Male Sprague-Dawley rats averaging 250 gm were ligated common bile duct and observed liver by light and electron microscope at 2, 4, 6, and 8 weeks after ligation. On light microscopy, hepatocytic cells were interposed between ductular epithelial cells in proliferated bile ductules. On electron microscopy, there were epithelial cells having abundant RER and mitochondria, which is similar to that in hepatocytes, in the proliferated ductules. But these cells were surrounded by basement membrane. The hepatocytes occupying common lumen with ductular epithelial cells had partial or discontinuous basement membrane. There were intermediate cells having ultrastructural characteristics both ductular epithelial cells and hepatocytes. Based on above results, it was strongly suggestive of presence of intermediate cells between ductular epithelial cells and hepatocytes in proliferated ductular lining. It would be considered that epithelial cells of newly formed bile ductules could be originated from the hepatocytes.
항공사 여승무원의 외적용모 품질 구성요인과 고객만족 및 서비스 재이용 의도에 관한 연구
장대성,김민수 대한경영학회 2003 大韓經營學會誌 Vol.16 No.7
The service quality of airliners has been regarded as crucial to get the competitive advantages due to increasing competition in the airline industry. Parasuraman, Zeithaml and Berry(1988) identified the appearance of service providers as one of the important factors of tangible quality. This study tried to contribute to both academic and practical issues concerning the impact of flight attendant's appearance on customers' satisfaction with the appearance image of the flight attendants. Data was collected from a Korean airliners' customers. Factor analysis was conducted to identify the major factors of flight attendants' appearance and multiple regression analysis was employed to examine the impact of flight attendant's appearance on customers' satisfaction and repurchase intention. The results of the analyses show that several factors of flight attendants' appearance influence the customers' satisfaction with the appearance image of the flight attendants and repurchase intention.