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Fibronectin과 성장인자의 단독 혹은 복합투여가 배양 인체 치은섬유모세포 및 치은인대세포의 활성에 미치는 효과
김응태,한두석,유형근,신형식,Kim, Eung-Tae,Han, Du-Seok,Yoo, Hyung-Keun,Shin, Hyung-Shik 대한치주과학회 1995 Journal of Periodontal & Implant Science Vol.25 No.2
The selective migration, attachment and proliferation of periodontal ligament cells are the desired goal of periodontal regeneration therapy. Fibronectin is well known for an attachment protein for dentin surface. Also, Fibroblast growth factor (FGF) is well known to enhance the periodontal regeneration. The purpose of this study was to evaluation the effect of fibronection and FGF on the attachment rate and the cellular activity. Human gingival fibroblast and periodontal ligament cells were cultured from the teeth extracted for non-periodontal reson. Cultured human gingival fibroblast and periodontal ligament cells in vitro were treated with fibronectin and FGF a various dosage and culture times. Cellular activity was examined by MTT assay. The results of this study was demonstrated that cell attachment rate of experimental group was under the control value at 1st, 2nd, 3rd incubation day. But, at 3rd incubation day, attchment value tended to return to the control value. In case of fibronectin alone application, cellular activity was decreased than that of control at 1st, 2nd incubation day. But 3rd day, cellular activity was returned to the control value. The activity of gingival fibroblast in FGF alone application was decreased thatn that of control at each incubation day. But activity of periodontal cell group was increased cell activities at 2nd, 3rd day. Additionally cellular activity of fibronectin & FGF combined application on gingival fibroblast group was similar to control value at incubation day. But activity of periodontal ligament cell group was increased at 2nd, 3rd day compared with control group.This study demonstrated that combined application of fibronectin & FGF induced the selective chemotaxis for periodontal ligament cell in vitro.
김응태(Eung-Tae Kim),고성호(Sung-Ho Ko),김현(Hyun Kim),정용채(Yong-Chae Jeong),최성필(Seong-Pil Choi) 한국유체기계학회 2006 유체기계 연구개발 발표회 논문집 Vol.- No.-
The purpose of this study is to explain the importance of Vibration Monitoring Device by introducing an example of Predictive Maintenance System using Condition Monitoring System of Hydro-turbine generator. Confirming vibration of generation equipment is commissioning procedure during equipment completion for checking guaranteed items. Data from Generator output range are used to determine output band to continue the performance of equipment. The Vibration Monitoring System is not absolute method of maintenance, but if it is used well with expert, it will be visible, data-analyzed, scientific maintenance more than others. And also, Condition Monitoring System is very important for remote controlled small hydro-power plant although most of it is installed in Large hydro-power plant.
김응태(Eung-Tae Kim),정용채(Yong-Chea Jung),박장원(Jang-Won Park) 한국유체기계학회 2005 유체기계 연구개발 발표회 논문집 Vol.- No.-
The Purpose of this writing is a presentation of small turbine efficiency measuring method, applicable new technology, and several analysis result for real turbine. Measurement methods of hydraulic efficiency written in here are extracted from small turbine applicable international code(IEC, ASME). It includes brief synopsis of 'Current meter method' and 4 other methods and ASFM as a new small turbine applicable technology. And several analysis of test result are for recently performed domestic small turbine result in korea. Through this presentation of extracted code, I hope that it make other small turbine concerner be familiar to perform an efficiency test for small turbine. And, some analysis of that, make other to feel the importance of efficiency test.
김응태(Kim Eung Tae),정용채(Jeong Yong Chea),박장원(Park Jang Won) 한국유체기계학회 2006 유체기계 연구개발 발표회 논문집 Vol.- No.-
Abstract should be in English. A make out an economical, reliable and easy to adoptable instrument in turbine discharge measurement was restricted from lots of it's foundational condition. Not with standing the brilliant progress in new technology of these day, useful instrument for flow measurement in turbine is still ongoing. Nowaday, the increasing importance of renewable energy makes it more important that the measuring turbine efficiency as a decision making index of old turbines' replacement. In Turbine performance diagnosis, Kwater(Korea Water Corporation) got an enough ability and decent reputation for who has invested lots of time and effort for buildup and development. In Korea as a public corporation who should take a crucial roll in Turbine business, Kwater has introduced some developed new technology for other domestic concerned one. With this writing, I'd like to introduce ASFM system as a newly developed instrument that can cope with lots restriction in discharge measurement in turbine. Kwater adopted the system in 2005, and performed 2 times of trial test. The test result was good enough to use the system as a reference test method.