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PMN / PT[0.9 Pb(Mg⅓Nb⅔)O₃-0.1 PbTiO₃]에 La이 첨가된 광섬유 전왜변환기를 이용한 간섭계형 광섬유 전계센서의 특성분석
강원석(W. S. Kang),이영탁(Y. T. Lee),강현서(H. S. Kang),정래성(R. S. Jung),이경식(K. S. Lee),장현명(H. M. Jang) 한국광학회 1996 한국광학회지 Vol.7 No.2
전왜재질 0.9 PMN/0.1 PT에 각각 조성비율이 1%, 2%, 3%의 La이 첨가된 3종류의 재질을 광섬유에 부착하여 광섬유 전왜변환기를 제작하였다. 실험결과 La 3% 첨가된 재질의 전왜계수가 3.38㎑에서 3.87×10^(-16)(m/V)²로 가장 크다는 것을 알 수 있었으며 La을 첨가함으로 해서 이력이 줄어듬을 알 수 있었다. La 3%인 재질로 구현된 광섬유 전계센서의 최소감지전계는 2.08(V/m)/√㎐였으며 가변영역 40㏈ 이상에 걸쳐서 선형성이 우수하였다. We report a fiber optic interferometric electric field sensor that utilizes electrostrictive ceramics-1%, 2%, 3%, La-doped 0.9PMN/0.1PT, respectively-as the transducing elements. It is also experimentally observed that 3% La-doped PMN/PT among the three elements has the largest electrostrictive coefficient M=3.87×10^(-16)(m/V)² at 3.38 ㎑ and displays small hysteresis. The optical fiber sensor with the 3% La-doped PMN/PT exhibits minimum detectable field of 2.08(V/m)/√㎐ and has a good linearity over the dynamic range 40 ㏈.
Encephalomyocarditis Virus 표면항원의 단일항체 생산세포주의 크론과 이의 면역학 및 생화학적 연구(Ⅱ)
양종대,박종수,이영탁,김화영,김영래,이인수,조영준,박재윤,차종희,윤지원,고광삼 朝鮮大學校 附設 醫學硏究所 1987 The Medical Journal of Chosun University Vol.12 No.1
To see whether there is any differencies in RNA dependent DNA polymerase activities between monoclonal antibody-producing hydridoma cells and non-producing hybridoma cells, Balb/c female mice were immunized with the purified viral surface protein of D-variant of encephalomyocarditis virus and then fused with myeloma cells (NR-1). After cloring, monoclonal antibody-producing hybridoma cell lines were separated from non-producing hydridoma cell lines. RNA-dependent DNA polymerase activities were measured in the supernatant of monoclonal antibody-producing hybridoma clones and non-producing hybr idoma clones, and myeloma cells as control, Monoclonal antibody-producing hybridoma cells showed statistically significant higher activity as compar compare to that of nonproducing hybridoma cells. To find whether RNA-dependent DNA polymerase releasing cells aware secreting or budding C-type virus particles, those cells were examined with electron microscope. The hybridoma cell which secrete large amount of RNA-dependent DNA polymerase shows significant number of extracellular C-type virus particles. In constrast, non-producing hydridoma cells contains a lot of intracellular C-type virus particles. It is concluded that monoclonal antibody-producing hydridoma cells released particles. It is concluded that monoclonal antibody-producing hydridoma cells released significant amount of RNA-dependent DNA polymerase land extracellular C-type virus particles, while non-producing hydridoma cells showed less release of RNA-dependent DNA polymerase and contains intracellular C-type virus particles.
배양한 가토신장세포에서 TPA에 의한 인지질대사변화에 대한 연구
박충식,박종수,이병래,이인수,이영탁,김화영,김영래,조영준,박재윤,차종희,고광삼 朝鮮大學校 附設 醫學硏究所 1987 The Medical Journal of Chosun University Vol.12 No.1
The effects of the tumor promoter 12-0-tetradecanoylphorbol-13 acetate(TPA) on the phospholipid metabolism were studied. As measured by incorporation of ^(32)P and labeled precursors of the polar head groups, and enhanced stimulation of phosphollpid metabolism could be detected within 4 hr after treatment of cells with the TPA. The stimulating effect of TPA on phospholipid metabolism may in part be due to an increase in intracellular inorganic phosphate.
배양한 가토신장세포에서 TPA에 의한 지방대사변화에 대한 연구
김성봉,박종수,박주홍,이인수,차종희,김화영,김영래,조영준,이영탁,박재윤,고광삼 朝鮮大學校 附設 醫學硏究所 1987 The Medical Journal of Chosun University Vol.12 No.1
The effect of the tumor promoter 12-0-tetradecanoyl-phorbol-13-acetate on the lipid metabolism of rabbit kidney cells was studied. Modification accompanying the phorbol ester-induced differentiation include an increase in the amount of neutral glycerolipids, and a selective incorporation of long-chain fatty alcohols into triacyglycerols and ether-linked akyldiacylglycerols. There is a possibility that the commitment of cells toward inhibition of differentiation characteristics depends on the predisposition of the cells for alteration in lipid metabolism caused by 12-0-tetradecanoylphorbol-13-acetate.