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Enantioselective sorption of alcohols in a homochiral metal–organic framework
Suh, Kyungwon,Yutkin, Maxim P.,Dybtsev, Danil N.,Fedin, Vladimir P.,Kim, Kimoon The Royal Society of Chemistry 2012 Chemical communications Vol.48 No.4
<p>Single-crystal X-ray diffraction study reveals the host–guest interactions between a homochiral metal–organic framework and two enantiomers of a chiral alcohol providing the key driving force for the enantioselective sorption of alcohols in the framework.</p> <P>Graphic Abstract</P><P>Single-crystal X-ray diffraction study reveals enantioselective recognition <I>via</I> H-bond interaction between a chiral substrate and an enantiopure porous metal–organic framework. <img src='http://pubs.rsc.org/ej/CC/2011/c1cc16209h/c1cc16209h-ga.gif'> </P>
Validation Result of Combustion Method for Simultaneous Analysis of 3H and 14C
Kyungwon Suh,Kwang Eun Lee,Jung Bo Yoo,Tae-Hong Park 한국방사성폐기물학회 2022 한국방사성폐기물학회 학술논문요약집 Vol.20 No.2
Combustion method has been widely used in the analysis of 3H and 14C in various types of radioactive wastes since X. Hou reported the analysis of 3H and 14C in graphite and concrete for decommissioning of nuclear reactor. In this work, it was demonstrated that the validation result of combustion method for the simultaneous analysis of 3H and 14C in non-combustible radioactive wastes. To validate the combustion method, 3H and 14C spiked to sea sand and soil were prepared and each simulated sample was combusted with the accordance to a combustion temperature program. The validation of combustion method was assessed by the radioactivity recovery, radioactivity deviation, and relative standard deviation of measured radioactivity. The results of radioactivity recovery, radioactivity deviation, and relative standard deviation of 14C were 100~105%, less than 7%, less than 5%, respectively. In addition, 3H showed about 90% of radioactivity recovery, less than 20% of radioactivity deviation, and less than 5% of relative standard deviation. It will be provided that the validation results of combustion method in detail.
Current Status on Laboratory Information Management System in KAERI
Kyungwon Suh,Kyunghun Jung,Jung Bo Yoo,Tae-Hong Park,Seung Ho Kim 한국방사성폐기물학회 2022 한국방사성폐기물학회 학술논문요약집 Vol.20 No.1
According to the article 18 of NSSC notice “Regulations on the delivery of low-and intermediatelevel radioactive wastes”, the consignor shall establish and implement the quality assurance program about waste management to ensure conformity with the criteria set forth in the regulations and detailed criteria proposed by the disposal facility operator, including matters related to characterization of the waste concerned. To meet the above requirement, commercially available laboratory information management system, STARLIMS from Abbott Informatics was introduced in the late of 2019 and was customized to our standardized test method in 2020. In that time, Electronic Lab Notebook (ELN), which is an electronic system to create, store, retrieve, and share fully electronic records, was tailored to replace paper lab notebook. Scientific Data Management System (SDMS), which is computer system used to capture, centrally store, catalog, and manage data, was installed. Due to the parsing ability of SDMS, human error like mistake while data entry was reduced by extracting data from measurement sheet and exporting measurement data to designated area of ELN and this feature made work efficiency improved. Afterward, validation of STARLIMS was conducted following the procedure of user acceptance testing including Operational Qualification and Performance Qualification. As a result of these activities, STARLIMS has been officially operated and applied to means to manage test results since 2021. In 2021, for user-friendly environment, updating STARLIMS was also conducted by applying SDMS to import data from other radiometric measurements including gas proportional counter (GPC), liquid scintillation counter (LSC), and low-energy Ge detector (LEGe) besides HPGe detector for gamma measurement. From implementation to operation, it is confirmed that STARLIMS has been providing reliable and stable platforms to manage laboratory information regarding measurement records and playing a significant role in tool to meet the quality assurance required.
서경원(Kyungwon Suh) 한국자동차공학회 2002 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2002 No.5_3
The life data analysis of the system and component are useful to describe the result of reliability test in the product validation area. In vehicle development procedure, various reliability tests evaluate product life to satisfy customer's growing needs and to change test specifications or design criteria by life data analysis. And vehicle durability test occurred at the final development stage ascertains product reliability in the proving ground resembled market environment.<br/> In this study, a statistical analysis and experiment for the wear life of brake pad linings helped perform correlation procedure between vehicle durability test and field. B-life values of the brake pad wear life data from both vehicle durability test and field usage were compared to determine acceleration of the test. The acceleration coefficient of the vehicle durability test can access to evaluate design criteria of product and test specification.
Suh, Borum,Bae, Il Kwon,Kim, Juwon,Jeong, Seok Hoon,Yong, Dongeun,Lee, Kyungwon American Society for Microbiology 2010 Antimicrobial Agents and Chemotherapy Vol.54 No.12
<B>ABSTRACT</B><P>The aim of this study was to investigate the mechanisms involved in the meropenem resistance of <I>Serratia marcescens</I> clinical isolates. Meropenem-resistant (MIC range, 16 to 32 μg/ml) <I>S. marcescens</I> isolates were recovered from nine patients in a tertiary hospital in Seoul, South Korea, from June to November 2005. All the isolates shared identical or similar (>85% similarity) SpeI macrorestriction patterns, indicating clonal spread. PCR experiments did not detect any carbapenemase in those isolates. They carried the <I>bla</I>CTX-M-22 gene located on a 150-kbp plasmid of the incompatibility group L/M; however, the addition of clavulanic acid exhibited few effects on meropenem MICs. Although meropenem MICs were reduced 4- to 16-fold with the addition of boronic acid, no plasmid-borne AmpC β-lactamase gene was detected in PCR experiments. Real-time quantitative PCR experiments showed that expression levels of the chromosomal <I>ampC</I> gene in those isolates were 87.06 to 155.76 times higher than that of the reference strain ATCC 8100. SDS-PAGE showed a lack of the 42-kDa outer membrane protein (OmpF). In combination with the overproduction of the chromosomal AmpC enzyme, the loss of OmpF may have played a role in the acquisition of meropenem resistance in our isolates.</P>