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세포대사 기능 분석을 위한 광학센서 기반 용존산소와 pH 측정 시스템의 제작 및 특성 분석
장지운 ( Ji Woon Jang ),황인숙 ( In Sook Hwang ),이종목 ( Jong Mok Lee ),이선민 ( Sun Min Lee ),강소라 ( So Ra Kang ),김영미 ( Young Mi Kim ),김나영 ( Na Young Kim ) 한국센서학회 2016 센서학회지 Vol.25 No.1
This study evaluates the performance of an optical sensor and measurement system (CMA-24) which can analyze the fluctuation of dissolved oxygen and pH simultaneously. In the optical sensor system, the fluorescent materials, Rudpp and HPTS which are sensitive to dissolved oxygen and pH, respectively, are coated on the bottom of a 24-well -plate by the sol-gel technology. The detection times of the emission light of the oxygen sensor were 4,186±13.90 μs and 4,452±36.68 μs for the dissolved oxygen of 17% O2 and 7.6% O2, respectively. On the other hand, the detection times of the pH sensor were 6,699.43 ± 14.64 μs, 6,722.24±6.21 μs, and 6,748.52 ±2.63 μs using pH 6, 7, and 8, respectively. When we determined cellular respiration levels of C2C12 myocytes with CMA-24, O2/ pH measurement system, the ratio of the uncoupled to coupled OCR (oxygen consumption rate) was 1.41. The results mean that this CMA-24 system shows almost the same sensitiveness as the commercial system.
PWR 사용후핵연료의 Li 환원과정 모사 프로그램 개발
이윤희,신희성,장지운,김호동,윤지섭,Lee, Yun-Hee,Shin, Hee-Sung,Jang, Ji-Woon,Kim, Ho-Dong,Yoon, Ji-Sup 한국방사성폐기물학회 2006 방사성폐기물학회지 Vol.4 No.4
In this paper a computer program was developed, which simulates the Li reduction process of PWR spent fuel, and the amount of a produced metal or chloride compound was calculated at the various amount of Li with the program. It establishes a database, which is composed of some characteristics related to a chemical reaction equation and thermodynamic data, and it calculates the transformed rate of PWR spent fuel oxide at the certain amount of Li by using the database as input data. As the results of the performance test of the program, it was validated that the transformed values of oxides, except for $Eu_2O_3$ and $Sm_2O_3$, were almost the same to within about a 6 % error with those calculated by the previous code and that the calculated amount of Li was also exactly consistent with the theoretical one, which is used for a complete reaction of each oxide in a single chemical reaction. A relationship between Li and the transformed metal of each oxide was analyzed on the basis of the quantities calculated with the verified development program. Of the results, when the amount of Li was given to be 250 mole, the 83.73 percentage of $UO_2$ was transformed into U while the remainder was still to be $UO_2$. In addition, it was appeared that the 297 mole of Li was needed to completely convert $UO_2$ into U.