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An asymmetric SMC–kleisin bridge in prokaryotic condensin
Bü,rmann, Frank,Shin, Ho-Chul,Basquin, Jé,rô,me,Soh, Young-Min,Gimé,nez-Oya, Victor,Kim, Yeon-Gil,Oh, Byung-Ha,Gruber, Stephan Nature Publishing Group, a division of Macmillan P 2013 Nature structural & molecular biology Vol.20 No.3
Eukaryotic structural maintenance of chromosomes (SMC)–kleisin complexes form large, ring-shaped assemblies that promote accurate chromosome segregation. Their asymmetric structural core comprises SMC heterodimers that associate with both ends of a kleisin subunit. However, prokaryotic condensin Smc–ScpAB is composed of symmetric Smc homodimers associated with the kleisin ScpA in a postulated symmetrical manner. Here, we demonstrate that Smc molecules have two distinct binding sites for ScpA. The N terminus of ScpA binds the Smc coiled coil, whereas the C terminus binds the Smc ATPase domain. We show that in Bacillus subtilis cells, an Smc dimer is bridged by a single ScpAB to generate asymmetric tripartite rings analogous to eukaryotic SMC complexes. We define a molecular mechanism that ensures asymmetric assembly, and we conclude that the basic architecture of SMC–kleisin rings evolved before the emergence of eukaryotes.
Gim, B.,Yoon, W.L. Pergamon Press ; Elsevier Science Ltd 2012 INTERNATIONAL JOURNAL OF HYDROGEN ENERGY - Vol.37 No.24
This paper deals with the analysis of the economy of scale at on-site hydrogen refueling stations which produce hydrogen through steam methane reforming or water electrolysis, in order to identify the optimum energy mix as well as the total construction cost of hydrogen refueling stations in Korea. To assess the economy of scale at on-site hydrogen stations, the unit hydrogen costs at hydrogen stations with capacities of 30 Nm<SUP>3</SUP>/h, 100 Nm<SUP>3</SUP>/h, 300 Nm<SUP>3</SUP>/h, and 700 Nm<SUP>3</SUP>/h were estimated. Due to the relatively high price of natural gas compared to the cost of electricity in Korea, water electrolysis is more economical than steam methane reforming if the hydrogen production capacity is small. It seems to be the best strategy for Korea to construct small water electrolysis hydrogen stations with production capacities of 100 Nm<SUP>3</SUP>/h or less until 2020, and to construct steam methane reforming hydrogen stations with production capacities of 300 Nm<SUP>3</SUP>/h or more after 2025.
HDP-CVD를 이용한 OLED용 수분침투 방지막에 대한 연구
김창조(T.J. Gim),신백균(P.K. Shin),최윤(Y. Choi),이붕주(B.J. Lee),김병수(B.S. Kim),이병수(B.S. Lee),최창락(C.R. Choi) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.7
현재 상용화된 OLED 소자는 최대 단접인 수분 취약성의 원인으로 top emission과 flexible 타입으로 제조되는데 장애가 되고 있다. 따라서 top emission 방식과 flexible한 소자를 실현하기 위해 수분 및 산소 침투를 망지하기 위한 유전체 막의 실험이 진행되고 있는데, 본 실험에서는 기존의 PECVD보다 plasma의 density가 높은 HDP(High Density Plasma)-CVD를 사용해 SiOx 및 SiNx 유전체 film을 증착하였고 MOCON 테스트를 통한 수분침투 방지막으로써의 가능성을 검증하였다.
김경남(G.M. Gim),손서빈(S.B. Son),남화진(H.J. Nam),이성진(S.J. Lee),김창민(C.M. Kim),김병수(B.S. Kim) 한국전산유체공학회 2013 한국전산유체공학회 학술대회논문집 Vol.2013 No.10
In this paper, surface grid generation program for aerodynamic analysis using panel method is described. This program can be used to generate Panel-grid along the body surfaces which are defined as STL data. STL format is one of those standard neutral formats for model data exchange. The program allows its user to define surface patches either interactively by manual mode or semi-automatically by automatic mode with proper amount of user-specified parameters. Users create the Panel-grid that there are no flow girds in order to quickly analyze aerodynamics. A panel method requires much less wall-clock time and human resources compared to conventional CFD approaches for flow analysis, and it is still widely used in the preliminary design stage for airplane design process. This research would suggest an efficient way of surface panel-generation for aircraft aerodynamic analysis.