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임준범 ( Joon Bum Lim ),이수범 ( Soo Beom Lee ),성정곤 ( Jung Gon Sung ),박준태 ( Jun Tae Park ) 한국안전학회(구 한국산업안전학회) 2012 한국안전학회지 Vol.27 No.4
This research has analyzed factors affecting customers` satisfaction when they use parking lots of big retailers so that, in case of constructing, operating or managing such retailers, proper measures can be come up with. The analysis has been implemented on the basis of survey, and influence factors including entry/exit lamp, parking cars`` traffic flow, parking type, pedestrians`` movement after parking and safety. Parking lot users`` satisfaction has been analyzed by using the Structural Equation Modelling and, as a result of it, in case of a detached or single building, pedestrians movement flow after parking contributed the most to the users`` satisfaction, while, in case of multipurpose complex, parking cars traffic flow has the most influential factor. It is interpreted that users of a single building put a bigger emphasis on entry to the shop and their way back to the parked area after their shopping while customers of multipurpose complex might have various purposes of visiting the place and there are relatively more cars so that they put more emphasis on traffic counterflow, other cars and pedestrians.
Park, Hyeon Soo,Hwang, Yong Hyeon,Kim, Mun Ki,Hong, Gyeong Eun,Lee, Ho Jeong,Nagappan, Arulkumar,Yumnam, Silvia,Kim, Eun Hee,Heo, Jeong Doo,Lee, Sang Joon,Won, Chung Kil,Kim, Gon Sup Japan Society for Bioscience, Biotechnology, and A 2015 Bioscience, Biotechnology, and Biochemistry Vol.79 No.1
<P>Grifola frondosa (GF), distributed widely in far east Asia including Korea, is popularly used as traditional medicines and health supplementary foods, especially for enhancing the immune functions of the body. To extend the application of GF polysaccharides (GFP) for atopic dermatitis (AD), we investigated the effects of GFP on the 2,4-dinitrochlorobenzene-induced AD-like skin lesion in NC/Nga mice. GFP treatment significantly reduced the dorsa skin dermatitis score and combination treatment with GFP, and dexamethasone has a synergistic effect in AD-like skin lesion by reduced Serum IgE, mast cells infiltration, and cytokines expression. These results indicate that GFP suppressed the AD-like skin lesions by controlling the Th-1/Th-2-type cytokines in NC/Nga mice. These findings strongly suggest that GFP can be useful for AD patients as a novel therapeutic agent and might be used for corticosteroids replacement or supplement agent.</P>
Sang-Gu Kang,Hyeon-Ji Lee,Eui-Ho Park,Sang-Gon Suh 한국분자세포생물학회 2002 Molecules and cells Vol.13 No.1
Two cDNAs, STGA2 and STGB2, that encode heterotrimeric G protein alpha and beta subunit proteins, respectively, were cloned from an early tuber cDNA library of potato (Solanum tuberosum cv. Superior). The cDNA of STGA2 encoded 384 amino acids, which showed 75-98% identities to plant Ga-subunits; STGB2 encoded 377 amino acids, which showed 83- 92% identities to plant Gb-subunits. The transcript levels of the two genes were abundant in leaves, shoots, axially buds, unopened flowers, and active growing sprouts. However, the transcripts were barely detectable in roots. The expressions of STGA2 and STGB2 were up-regulated by light. Interestingly, the STGA2 and STGB2 gene expression showed synchronous patterns in the examined organs. During the early tuber development, the transcripts of STGA2 and STGB2 were abundant in unswollen stolons, swollen stolons, and new tubers, but were undetected in matured tubers. This indicates that potato Ga- and b-subunit genes are developmentally regulated. Based on these observations, we propose that heterotrimeric G proteins may be involved in the signaling pathway during potato tuber development.
Direct Organocatalytic Regioselective α-Hydroxyamination of α-Branched Aldehydes
Sung-Gon Kim*,Eun Ju Ahn,Tae-Ho Park 대한화학회 2007 Bulletin of the Korean Chemical Society Vol.28 No.10
A direct regioselective a-hydroxyamination of a-branched aldehydes with nitrosobenzene using cis-5-benzyl-proline as catalyst has been developed for the preparation of a-hydroxyamino aldehydes possessing a quaternary carbon center. Such compounds are versatile building blocks for the synthesis of quaternary a-amino acids, b-amino alcohols, and 1,2-diamines.
Park, Jae Hyun,Hwang, Sun-Mi,Park, Gu-Gon,Park, Seok-Hee,Park, Eun-Duck,Yim, Sung-Dae Elsevier 2018 ELECTROCHIMICA ACTA Vol.260 No.-
<P><B>Abstract</B></P> <P>Carbon corrosion due to high voltages encountered during the operation of fuel cells and the accompanying deterioration of cell performance are among the main issues affecting the durability of fuel cells. In this study, the carbon-corrosion durability of membrane electrode assemblies (MEAs) fabricated with Pt/CNF and Pt/C catalysts is studied using an accelerated stress test (AST) while applying high potentials. We compare the cell performance for the same degree of carbon corrosion, and the two MEAs show almost the same degradation behavior at the early stage of carbon corrosion. However, as the degree of carbon corrosion is increased, the performance-decay behavior of the two MEAs differs significantly, with there being a more serious performance decay in Pt/C than Pt/CNF, even at the same degree of carbon corrosion. The different behavior of the performance degradation between the two MEAs is due to the different catalyst layer structure, which results from the different catalyst-support morphologies between the three-dimensional (3D) high-structure Vulcan carbon (VC) and the one-dimensional (1D) structure of platelet carbon nanofibers (PCNFs). The support structure-dependent performance-degradation characteristic is analyzed in a single cell by performing an electrochemical analysis of the kinetic resistance, ohmic resistance, and diffusion resistance. In addition, the characterization of the catalyst layer structure before and after the deterioration is performed to understand the deactivation mechanism. This study is expected to provide a design strategy from a structural perspective of carbon support for the development of highly durable MEAs.</P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>