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신병철(B.C.Shin),김동인(D.I.Kim),이재기(J.K.Lee),김창수(C.S.Kim) 한국자동차공학회 1998 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1998 No.5_1
To reduce particulate matter(PM) effectively from diesel emissions, high pressure injection technique has been introduced. Electronic unit injector(EUI) differs from conventional fuel injection system, in that EUI assembles plunger, nozzle, and housing together and forms like a unit type. As getting rid of fuel pipe, dead volume can be decreased. So EUI generates high pressure over 1500bar. and make rapid spill possible at the same time. EUI employs solenoid valve, which can electronically control injection timing and fuel injection quentity. it doesn't need governor and timer anymore.<br/>
새로운 내부 방사선 치료용 166Ho - Chitosan 착물 및 그 응집입자의 제조에 관한 연구
박경배(K . B . Park),김영미(Y . M . Kim),신병철(B . C . Shin),김재록(J . R . Kim) 대한핵의학회 1996 핵의학 분자영상 Vol.30 No.3
N/A Chitosan is a polysaccharide of natural orgin obtained by full or partial deacetylation of chitin, a very abudant natural polymer, which has the properties of biocompatibilities, bioaffinities, and biodegradabilities. The free amino group of chitosan should be participated in forming chelate with holmium (β-emitter). Ho-166(NO3)3. 5H2O of high radionuclidic purity of upto 99.9% was made by neutron irradiation of naturally occuring Ho-165(NO3)3., 5H2O, and then reacted with the prepared chitosan solution. The effect of pH, reaction time, the concentration and viscosity of chitosan and the amount of Ho-166 on forming Ho-166-chitosan complex (Ho-166-CHICO) were investigated. Ho-166-chitosan macroaggregate(Ho-166-CHIMA) was made from Ho-166-CHICO. Their physical properties such as radionuclidic purity, particle size distribution, stability in vitro and vivo were examined. Their high in vitro and vive stability makes them attractive agents for interna1 radiotherapy by local administeration.