http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
LaFe₁хMхO₃산화물의 CO산화 촉매 활성 및 감지 특성
林炳五,梁千會,劉一增 弘益大學校 1985 弘大論叢 Vol.17 No.2
Correlation of catalytic activity for the oxidation of CO and sensor response to CO was investigated. The perovskite-type oxides prepared by partial substitution of LaFeO₃with other 3d transition metal M to give LaFe₁_хMхO₃. The catalytic activity of LaFe₁_хCOхO₃(x=0 to 0.2) increase in X, but the highest sensor response was achieved at x=0.1. It was found that the sensor response increased in proportion to the catalytic activity, provided that the apparent activation energy for electrical conduction was unaffected by the substitution.
북한이탈주민의 외상 후 스트레스 장애와 자연살해세포 활성
김병창,정성훈,임효덕,최종혁,전정희,전양환 大韓神經精神醫學會 2008 신경정신의학 Vol.47 No.5
Objectives : The objective of this study was to evaluate an association between posttraumatic stress disorder (PTSD) and altered immunity m North Korean defectors who were more likely to develop medical conditions and other stress-related psychiatric disorders. Methods : Twenty-four North Korean defectors with PTSD and twenty-two controls without PTSD were recruited from the resettlement and training center for North Korean defectors in South Korea. Peripheral T lymphocyte subsets, natural killer(NK) cells, NK cell activity and plasma hormones (ACTH and cortisol) were obtained from all subjects. We also applied the Hamilton Rating Scale for Depression (HAM-D) and Hamilton Rating Scale for Anxiety (HAM-A) for all subjects. Results : We found NK cell activity was relatively lower than number of NK cells in North Korean defectors with PTSD. Subjects with PTSD had higher HAM-D and HAM-A scores than controls. However, there were no statistical differences in ACTH. cortisol, CD3, CD4, CD8, CD4/CD8 ratio, CD19 and CD56 between the two groups. Conclusion : These findings suggest North Korean defectors with PTSD show higher levels of depression, anxiety and impaired or weak immune function in NK cells.
양천회,홍필선,유일증,임병오 한국산업안전학회 1986 한국안전학회지 Vol.1 No.1
Gas sensing materials for detecting inflammable gas such as alcohol, propane, acetic acid, carbon monoxide, hydrogen were developed by utilizing MgO-Cr₂O₃-TiO₂ system. Between 300℃ and 500℃, reversible chemisorption becomes dominant and the electrical canduction of P-type semiconductive with the gas chemisorption. The ceramic sensor exhibits a high sensitivity to particular reducing gas such as alcohol, whereas propane and butane have little effect on the resistivity. The time response of adsorption is estimated to be about 20 sec. On the other hand, the desorption process, which corresponds to oxidation due to oxygen adsorption, take more than 60 sec. Thus the ceramic sensor can be used as a alcohol sensor in an ambient atmosphere. As the oxygen concentration is increased from 0.1 to 10 precent(10³-10^6ppm), the resistance decreases rapidly but stabilizes at higher concentration.
LaCoO3 산화물의 에탄올 감지특성에 미치는 CaO 의 영향
양천회,임병오,손태원 한국산업안전학회 1988 한국안전학회지 Vol.3 No.2
The perovskite-type compounds La(1-x)Ca_xCoO₃ were synthesized, their thermochemical properties and the gaseous sensitivity were investigated in ethanol vapor. The maximum response for detecting gas corresponded with the exothermic peak of DTA experiment. In any case the substituent was increased, the responsive ratio for detecting gas was grown upon, However, the needed time for response was later, and the operating temperature was elevated. The mechanism of this electrical conductivity was explained by the oxygen ionic diffusion through oxygen vacancy produced by the substituent.
CO2 분해용 촉매 CuO - Magnetite 및 ZnO - Magnenetite 합성
임병오,양천모 한국유화학회 1998 한국응용과학기술학회지 Vol.15 No.2
The Cuo-Magnetite and ZnO-Magnetite catalysts with various of Cuo and ZnO mole% for Carbon Dioxide decomposed reaction synthesized. The catalysts were reduced by H_2 at 350℃ for 3 hours. The temperature was obtained by TGA and DSC experiments. The structures of catalysts were confirmed by X-ray diffraction experimnt. The surface area of catalysts is 15∼27 ㎡/g. The results of Carbon Dioxide decomposed ability was better H_2-reduced magnetite catalysts with 0.03 mole% CuO and 0.03 mole% ZnO than others catalysts. After Carbon Dioxide decomposed reaction, catalysts were reacted H_2 and created only methane.
Development and Grid Operation of Superconducting Fault Current Limiters in KEPCO
Hye-Rim Kim,Seong-Eun Yang,Seung-Duck Yu,Heesun Kim,Byung-Jun Park,Young-Hee Han,Kijun Park,Jaeun Yu Institute of Electrical and Electronics Engineers 2014 IEEE transactions on applied superconductivity Vol.24 No.5
<P>Development and grid operation of superconducting fault current limiters (SFCLs) have been carried out in Korea Electric Power Corporation (KEPCO), as a possible measure to handle the increasing fault current in Korea. A 22.9 kV SFCL has been successfully operated unmanned on a distribution line of Icheon Substation. It has been very stable throughout the operation of more than 1.5 year. Temperatures and level of liquid nitrogen that cools the superconducting element have been maintained constant. Performance of the SFCL maintained the initial level. The SFCL was modified so that it can limit the fault current within the first half cycle. A short-circuit test on the modified SFCL showed it started limiting the current within 2 ms. In parallel, a 154 kV SFCL has been also developed. A superconducting element was designed and fabricated. A short-circuit test was performed on a superconducting unit module, and showed that the module limited the current effectively. The element is planned to be integrated into a single-phase 154 kV SFCL together with the cooling system and other components, and tested soon.</P>
CO₂ 분해용 촉매 CuO-Magnetite 및 ZnO-Magnenetite 합성
양천모(Yang Chun Mo),임병오(Rim Byung O) 한국유화학회 1998 한국응용과학기술학회지 Vol.15 No.2
The Cuo-Magnetite and ZnO-Magnetite catalysts with various of Cuo and ZnO mole% for Carbon Dioxide decomposed reaction synthesized. The catalysts were reduced by H₂ at 350℃ for 3 hours. The temperature was obtained by TGA and DSC experiments. The structures of catalysts were confirmed by X-ray diffraction experiment. The surface area of catalysts is 15~27 m²/g. The results of Carbon Dioxide decomposed ability was better H₂-reduced magnetite catalysts with 0.03 mole% CuO and 0.03 mole% ZnO than others catalysts. After Carbon Dioxide decomposed reaction, catalysts were reacted H₂ and created only methane.