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권옥배(Kwon, Ok-Bae),신창훈(Sin, Chang-Hun),박승수(Park, Seung-Su),한정민(Han, Jeong-Min),이정환(Lee, Jeong-Hwan) 한국신재생에너지학회 2006 신재생에너지 Vol.2 No.2
In Japan, research and development were undertaken on gas hydrate-side industrial processes associated with power generation system connections that may particularly be necessary to develop gas hydrated technology-based industrial systems. In so doing, data and engineering technologies useful n formulating guidelines on design of practical process were accumulated. In addition, basic research into theoretical evidence were carried out to promote and support the development of technological elements for those processes. In basic research designed to promote and support the research and development of elemental technologies, microanalyses were conducted to understand the decomposition mechanism of mixed gas hydrate. Moreover, measurement technologies that can be applied in industrial processes, such as numerical analyses and concentration measurement, were examined. Japan has developed a highly efficient gas hydrate formation process using micro-bubbles with a tubular reactor. Higher formation rate over conventional systems has been obtained by the process. As mentioned above, the technical problems were clarified and the economics were studied from a view point of the NGH technology in this study. The results can be applied for utilization and must contribute to popularization of gas hydrate production.
Ultrastructural Effects of Irradiation on Squamous Cell Carcinoma of the Uterine Cervix
김진희(Jin Hee Kim),김옥배(Ok Bae Kim),최태진(Tae Jin Choi),이상숙(Sang Sook Lee),박관규(Kwan Kyu Park),권건영(Kun Young Kwon),서영욱(Young Wook Suh),이태성(Tae Sung Lee),이탁(Tak Lee),차순도(Soon Do Cha) 대한방사선종양학회 1991 Radiation Oncology Journal Vol.9 No.2
1990년 1월 22일부터 1991년 7월 31일까지 계명대학교 동산의료원 치료방사선과에 내원한 자궁경부의 편평상피암 환자 19명을 대상으로 방사선치료에 수반되는 조직병리학적 및 초미형태학적 변화를 보기 위해 체외방사선 치료전 후(방사선조사량 900cGy, 1800cGy, 2700cGy, 3600cGy, 4500cGy)에 조직생검을 시행하여 방사선 치료가 암조직에 미치는 효과, 즉 암세포의 퇴행성 변화에 따른 추이를 관찰하였다. 본 실험을 통하여 방사선 조사가 종양세포에 심한 상해를 미침을 알 수 있었다. 이는 종양세포에 퇴행성 변화를 초래할 뿐 아니라 각질의 형태에도 변화를 가져왔다. 방사선에 의한 핵의 퇴행성 변화는 현저하였고 종양의 침윤형태는 변화 없었으나 핵분열수와 종양세포수는 감소하였다. 염증세포의 침윤과 다핵거대세포의 수와 핵용해된 세포의 수는 방사선량이 증가될수록 증가하였다. 전자현미경적으로는 조직에 장세사의 양이 방사선 조사 후 증가하였으나 교소체 수는 감소하였다. 섬유아세포가 2700cGy 이상에서 나타나기 시작하였고 3600cGy 이상에서는 종양세포는 급격히 그수가 감소되고 진행된 섬유화 조직에 의해 대치되었다. 방사선량이 증가함에 따라 활성화된 섬유아세포의 수가 늘어나는 반면 염증세포는 줄어 들었고 간질조직내 교원질이 증가되었다. 미토콘드리아와 내형질 세망의 종창, 세포간교의 소실 및 2차 리소좀의 수는 방사선량이 증가함에 따라 증가되었다 Nineteen patients with previously untreated invasive squamous cell carcinoma of the uterine cervix were treated by irradiation alone at the Keimyung University Hospital from January, 1990 to July, 1991. The serial samplings of the tissue taken before and during radiation of the uterine cervix were studied by light and electron microscopic examination. Radiation-induced cellular changes, particularly nuclear degeneration was pronounced. The tumor invasion pattern remained unchanged but the number of mitosis and tumor cells decreased. The number of infiltrating inflammatory cells, multinucleated giant cells and karyolytic cells were increased with radiation. Fibrosis was also increased. Electron microscopically, the amount of tonofilament in the tissue samplings was increased in the postirradiated state, but the desmonsomes were decreased in numbers. Fibroblasts began to appear after an irradiation dose of 2700cGy. After an irradiation dose of 3600cGy or more, tumor cells were nearly completely degenerated and displaced with mature fibrotic tissue. There was an increase of activated fibroblasts and collagen fibers but a decrease of inflammatory cells in the interstitial tissue. Swelling of the mitochondria and endoplasmic reticulum, loss of intercellular bridges and an increased number of secondary lysosomes were also found with radiation.