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이재현,이헌주,Lee, J.H.,Lee, H.J. Korean Society of Electron Microscopy 1984 Applied microscopy Vol.14 No.2
난소절제한 흰쥐에서 $17{\beta}$-estradiol과 progesterone을 장기간 주사햐여 자궁상피의 형태적 변화를 전자현미경으로 관찰하였다. 난소절제 후 자궁상피는 막성구조물과 지방구 기타의 구조물을 포함하는 vacuole의 출현이 특이적으로 나타났다. 상피는 낮은 입방형이며 세포 유리면에 소수의 짧은 microvilli를 볼 수 있었다. Estradiol투여시 상피는 높은 윈주형을 나타내며, 분비계는 비교적 잘 발달되고, 세포 유리면에 소수의 긴 microvilli도 관찰되었다. Progesterone 처리시의 상피는 세포 첨단부에 다수의 vacuole과 핵하부에 다수의 지방구의 집적이 관찰되었다. 이상의 결과로 보아 자궁상피는 형태학적 및 기능적인 상태에서 estrogen과 Progesterone 양자에 의해 변화를 받으며 이들 호르몬은 상피세포에 대해 독특한 영향을 나타낸다고 생각된다. Morphological changes of the epithelium of the endometrium by prolonged treatment of $17{\beta}$-estradiol or progesterone in ovariectomized rats was studied at the ultrastructural level. The epithelium of the endometrium in ovariectomized rats was characterized by the appearance of a number of vacuoles which was contained with the membraneous structures, lipid droplets and the others. The epithelium was low cuboidal, and a few short microvilli were present at the cell surface. Secretory granules are rarely found. After estradiol treatment, the epithelium was high columnar in shape. The mitochondria was appeared throughout the cytoplasm, however, long or swelling mitochondria was often found. Golgi apparatus and rER were relatively well-developed. Relatively long and sparse microvilli were present at the cell surface. After progesterone treatment, the epithelium was characterized by the appearance of numerous vesicles at the apical region and numerous lipid droplets at the subnuclear region. At the cell surface a number of short and blunt microvilli were found. These data indicated that the endometrium was dependent on estrogen and progesterone for changes in both its morphological and functional state and suggested that each hormone exerted a unique effect on the epithelial cells.
이재현,Lee, J.H. 한국현미경학회 1982 Applied microscopy Vol.12 No.2
The parotid glands of squirrels(Tamias sibiricus asiaticus) were observed by the electron microscope. According to the characteristics of secretory granules and the morphology of cell organelles, the acinar cells could be distinguished into five types of cells(Type I , Type II, Type III, Type IV and Type V cell). Among these, Type III, Type IV and Type V cell were not identified up to date. The morphologic characteristics of the intercalated and striated ducts were the appearance of numerous long slender mitochondria which are located between the numerous basal infoldings, and the epithelium were consisted of light and dark cells. The desmosomes were also observed, and could not found the secretory granules in the cytoplasm of the both epithelium.
풍력 발전 블레이드 Trailing Edge 부에서의 손상 감지 기법
이재현(J.H. Lee),허용학(Y.H. Huh),김동진(D.J. Kim),김종일(J.I. Kim),이건창(G.C. Lee),이영신(Y.S. Lee) 대한기계학회 2010 대한기계학회 춘추학술대회 Vol.2010 No.11
In this Study, in order to monitor the operational safety in wind turbine blade, damage detection technique was developed. The damage occurred in the blade was detected with measurement of local strain which was sensed with PVDF strain sensor. The blade components including trailing edge were manufactured. To detect the local damage, lots of strain gages and PVDF film sensors were mounted on the shear web and skin of the blade component. From the test, optimal location for detecting the occurrence of damage with static loading was investigated and sensitivity of the PVDF sensors location to the damage was examined. With increasing the applied load, pop-ins were happened. The strain variation of the PVDF sensors was characterized. From this study, PVDF strain sensor was found to be very useful in detecting the damage in wind turbine blade.