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CONSTRUCTION, ASSEMBLY AND COMMISSIONING OF KSTAR MAIN STRUCTURES
Yang, Hyung-Lyeol,Bak, Joo-Shik,Kim, Byung-Chul,Choi, Chang-Ho,Kim, Woong-Chae,Her, Nam-Il,Hong, Kwon-Hee,Kim, Geung-Hong,Kim, Hak-Kun,Sa, Jeong-Woo,Kim, Hong-Tack,Kim, Kyung-Min,Kim, Sang-Tae Korean Nuclear Society 2008 Nuclear Engineering and Technology Vol.40 No.6
The KSTAR device succeeded in first plasma generation on $13^{th}$ June of 2008 through comprehensive system test and commissioning. Among various kinds of the key factors that decisively affected the project, success in the construction and assembly of the major tokamak structure was most important one. Every engineering aspects of each structure were finally confirmed in the integrated commissioning period, and there were no severe troubles and failures prevented the KSTAR device from operating during the commissioning and the first plasma experiments. As a result, all of the experiences and technologies achieved through the KSTAR construction process are expected to be important fundamentals for future construction projects of superconducting fusion devices. This paper summarizes key engineering features of the major structures and of the machine assembly.
Yang, Yi,Bae, Woo Kyun,Nam, Sang-Jip,Jeong, Min-Hye,Zhou, Rui,Park, So-Yeon,Taş,, İ,sa,Hwang, Yun-Ho,Park, Myong-Suk,Chung, Ik Joo,Kim, Kyung Keun,Hur, Jae-Seoun,Kim, Hangun Elsevier 2018 Phytomedicine Vol.40 No.-
<P>Conclusion: The endolichenic fungus EL002332 has potential anticancer activity in gastric cancer and peritoneal carcinomatosis.</P>
Sa, Young Jin,Seo, Dong-Jun,Woo, Jinwoo,Lim, Jung Tae,Cheon, Jae Yeong,Yang, Seung Yong,Lee, Jae Myeong,Kang, Dongwoo,Shin, Tae Joo,Shin, Hyeon Suk,Jeong, Hu Young,Kim, Chul Sung,Kim, Min Gyu,Kim, Tae American Chemical Society 2016 JOURNAL OF THE AMERICAN CHEMICAL SOCIETY - Vol.138 No.45
<P>Iron-nitrogen on carbon (Fe-N/C) catalysts have emerged as promising nonprecious metal catalysts (NPMCs) for oxygen reduction reaction (ORR) in energy conversion and storage devices. It has been widely suggested that an active site structure for Fe-N/C catalysts contains Fe-N-x coordination. However, the preparation of high-performance Fe-N/C catalysts mostly involves a high-temperature pyrolysis step, which generates not only catalytically active Fe-N-x sites, but also less active large iron-based particles. Herein, we report a general 'silica-protective-layer-assisted' approach that can preferentially generate the catalytically active Fe-N-x sites in Fe-N/C catalysts while suppressing the formation of large Fe-based particles. The catalyst preparation consisted of an adsorption of iron porphyrin precursor on carbon nanotube (CNT), silica layer overcoating, high-temperature pyrolysis, and silica layer etching, which yielded CNTs coated with thin layer of porphyrinic carbon (CNT/PC) catalysts. Temperature-controlled in situ X-ray absorption spectroscopy during the preparation of CNT/PC catalyst revealed the coordination of silica layer to stabilize the Fe-N-4 sites. The CNT/PC catalyst contained higher density of active Fe-N-x sites compared to the CNT/PC prepared without silica coating. The CNT/PC showed very high ORR activity and excellent stability in alkaline media. Importantly, an alkaline anion exchange membrane fuel cell (AEMFC) with a CNT/PC-based cathode exhibited record high current and power densities among NPMC-based AEMFCs. In addition, a CNT/PC-based cathode exhibited a high volumetric current density of 320 A cm(3) in acidic proton exchange membrane fuel cell. We further demonstrated the generality of this synthetic strategy to other carbon supports.</P>
Woo, Jinwoo,Yang, Seung Yong,Sa, Young Jin,Choi, Won-Young,Lee, Myeong-Hwa,Lee, Hyun-Wook,Shin, Tae Joo,Kim, Tae-Young,Joo, Sang Hoon American Chemical Society 2018 Chemistry of materials Vol.30 No.19
<P>Iron- and nitrogen-codoped carbon (Fe-N/C) catalysts have emerged as promising alternatives to Pt-based catalysts for the oxygen reduction reaction (ORR) owing to their prominent ORR activity among nonprecious metal catalysts (NPMCs). This high ORR activity originates from atomically dispersed Fe coordinated with nitrogen atoms (Fe-N<SUB><I>x</I></SUB> site). However, the rational design of Fe-N/C catalysts with abundant Fe-N<SUB><I>x</I></SUB> active sites remains a challenge. In this work, we demonstrate that a silica-coating-mediated synthetic strategy enables the preparation of Fe-N/C catalysts enriched with active Fe-N<SUB><I>x</I></SUB> sites while mitigating the formation of less active Fe and Fe<SUB>3</SUB>C species. The silica-coating-mediated strategy was generally applicable to various types of Fe and N precursors, including iron porphyrin, iron acetate/1,10-phenanthroline, and iron chloride/polyaniline. This strategy was also effective in the preparation of Fe-N/C catalysts with various carbon supports and a wide range of Fe contents and pyrolysis temperatures. The strategy could be further extended to S- or P-doped Fe-N/C catalysts, in which the formation of inactive FeS and Fe<SUB>2</SUB>P species was suppressed. As a result, Fe-N/C catalysts prepared with the silica coating exhibited improved ORR activity up to a factor of 11 compared to silica-uncoated counterparts. Significantly, the S-doped Fe-N/C catalyst exhibited very high ORR activity with half-wave potential at 0.91 V (vs RHE) in alkaline media. In anion-exchange membrane fuel cell (AEMFC) tests, the S-doped Fe-N/C-based cathode showed a current density of 977 mA cm<SUP>-2</SUP> at 0.6 V, which is the highest performance among reported AMEFCs with NPMC-based cathodes. The S-doped Fe-N/C-based cathode also demonstrated promising volumetric current density in an acidic proton exchange membrane fuel cell. Thus, the silica-coating-mediated strategy is generally effective in preparing atomically dispersed catalytic entities and may be applicable to other catalytic reactions whereby monatomic catalysts exhibit high catalytic activities.</P> [FIG OMISSION]</BR>
Pyrogallol Red Molybdate법에 의한 Total Urinary Protein 측정
양희주 ( Hoi Joo Yang ),한태진 ( Tae Jin Han ),조병철 ( Byung Chul Cho ),전사일 ( Sa Il Chun ),민원기 ( Won Ki Min ) 대한임상검사과학회 2000 대한임상검사과학회지(KJCLS) Vol.32 No.3
Many methods for measuring total urinary protein have been described and compared. We evaluated the analytical performance of pyrogallol red molybdate(PRM) and 12.5% trichloroacetic acid(TCA) turbidimeπy methods for total urinary protein according to NCCLS guidelines. The PRM method showed a wide range of linearity and good precision. Within-day CVs of 2.4 % and 1.0 % and between-day CVs of 3.7 % and 1.0 % were observed at mean protein concentrations of 18.6 mgldL and 68.5 mgldL, respectively. The PRM method is simple, rapid and accurate and was the wide range of linearity more than the TCA turbidimetry method`` So, we conc1ude that the automated PRM method is an acceptable and practical alternative to the 12.5 % TCA turbidimetη method for the quantitation of urine protein.
CONSTRUCTION, ASSEMBLY AND COMMISSIONING OF KSTAR MAIN STRUCTURES
HYUNG-LYEOL YANG,JOO-SHIK BAKa,BYUNG-CHUL KIM,CHANG-HO CHOI,WOONG-CHAE KIM,NAM-IL HER,KWON-HEE HONG,GEUNG-HONG KIM,HAK-KUN KIM,JEONG-WOO SA,HONG-TACK KIM,KYUNG-MIN KIM,SANG-TAE KIM,DONG-JIN KIM,KWANG- 한국원자력학회 2008 Nuclear Engineering and Technology Vol.40 No.6
The KSTAR device succeeded in first plasma generation on 13th June of 2008 through comprehensive system test and commissioning. Among various kinds of the key factors that decisively affected the project, success in the construction and assembly of the major tokamak structure was most important one. Every engineering aspects of each structure were finally confirmed in the integrated commissioning period, and there were no severe troubles and failures prevented the KSTAR device from operating during the commissioning and the first plasma experiments. As a result, all of the experiences and technologies achieved through the KSTAR construction process are expected to be important fundamentals for future construction projects of superconducting fusion devices. This paper summarizes key engineering features of the major structures and of the machine assembly.