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Choi, K.M.,Jeong, J.M.,Bae, J.S.,Cho, D.H.,Jung, S.H.,Hwang, J.Y.,Baeck, G.W.,Park, C.I. ACADEMIC PRESS LTD 2016 Fish & Shellfish Immunology Vol. No.
<P>The rapid haemostasis of fish prevents bleeding or infection that could be caused by physical properties of the aquatic environment. Additionally, the innate immune system is the first line of defence against infection and is responsible for the recognition of pathogen-associated molecular patterns, which are important for the activation of acquired immune responses. Coagulation factor II (CFII) is an important factor in the coagulation system and is involved in recognition and interaction with various bacterial and extracellular proteins. In this study, we identified and characterised the gene encoding CFII in rock bream (Oplegnathus fasciatus) (RbCFII) and analysed its expression in various tissues after a pathogen challenge. The full-length RbCFII cDNA (2079 bp) contained an open reading frame of 1854 bp encoding 617 amino acids. Alignment analysis revealed that a gamma-carboxyglutamic acid-rich domain, two kringle domains, and a trypsin-like serine protease domain of the deduced protein were well conserved. RbCFII was ubiquitously expressed in all tissues examined but, predominantly detected in the liver and skin. RbCFII expression was dramatically up-regulated in the kidney, spleen and liver after infection with Edwardsiella tarda, Streptococcus iniae, or red seabream iridovirus. The recombinant protein RbCFII (rRbCFII) produced using an Escherichia coli expression system was able to bind all examined bacteria. Interestingly, rRbCFII has agglutination activities towards E. coli and E. tarda, while no agglutination was shown toward Vibrio ordalii and S. iniae. These findings indicate that rRbCFII performs an immunological function in the immune response, and might be involved in innate immunity as well as blood coagulation. (C) 2015 Elsevier Ltd. All rights reserved.</P>
Choi, H.,Park, Y.C.,Lee, Y.S.,An, H.,Baeck, K.K. North Holland ; Elsevier Science Ltd 2013 Chemical physics letters Vol.580 No.-
The extremely small (around 0.80kcal/mol) barrier for the -SH rotation of thiophenol is studied by using MP2, CASSCF(12,11), and three DFT (B3LYP, HCTH, and ωB97X-D) methods with various basis sets. The 6-311++G(3df,3pd) turns out to be the proper minimal basis-set for reliable calculations. CCSD(T) and CASPT2//CASSCF calculations confirm that the planar conformation of the -SH is the minimum-energy structure of not only the ground S<SUB>0</SUB> but also the first excited S<SUB>1</SUB> electronic states. The calculated torsional barrier of the S<SUB>1</SUB>, 1.89kcal/mol, is also quite small.
Nylon 6,6/Polyaniline Based Sheath Nanofibers for High-Performance Supercapacitors
Lee, K.M.,Kim, M.,Lee, E.,Baeck, S.H.,Shim, S.E. Pergamon Press 2016 ELECTROCHIMICA ACTA Vol.213 No.-
Nylon 6,6/PANI nanofibers using electrospun nylon 6,6 nanofibers as a template are synthesized by the in situ polymerization of different aniline concentrations for the preparation of all-polymer based core-sheath nanofibers with high electrochemical and mechanical properties, such as lightness and flexibility. These nylon 6,6/PANI based sheath nanofibers are used as electrode materials for supercapacitors. The electrochemical performance is examined by cyclic voltammetry (CV), galvanostatic charge/discharge tests and electrochemical impedance spectroscopy (EIS). The galvanostatic charge/discharge test reveals the highest specific capacitance of 665Fg<SUP>-1</SUP> at a current density of 1Ag<SUP>-1</SUP>. This electrode also shows remarkable rate charge/discharge capability and high cyclic stability (62% after 1000 cycles). In addition, the high energy density of the nylon 6,6/PANI composite electrode can reach 91Whkg<SUP>-1</SUP> at a power density of 500Wkg<SUP>-1</SUP>. The superior electrochemical properties of the core-sheath nylon 6,6/PANI nanofibers are attributed to their core-sheath structure, thin wall thickness and uniform wall distribution, which can improve the performance of electroactive PANI during the charge/discharge process. The good electrochemical performances highlight the potential of the nylon 6,6/PANI electrode as an electrode material for high-performance supercapacitors.
백석민(S M Baeck),이호도(H D Lee),김대업(D U Kim),이병근(B K Lee),이정환(J H Lee) 한국자동차공학회 2005 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2005 No.5_2
Aluminum 6061 alloy is widely used in automotive industry for structural parts, especially for hot forging applications. However, current automotive environments require better mechanical properties for less weight. In this study, compositional modification of billet-cast 6XXX alloy is investigated in terms of mechanical and metallurgical properties. The major elements modified were magnesium, silicon and manganese and mass production heat treatment conditions were applied. Developed new 6XXX aluminum alloy showed highly elevated mechanical strength around 400㎫ in tensile strength with good elongation value.
Jung, Y.S.,Kim, K.H.,Jang, T.Y.,Tak, Y.,Baeck, S.H. Elsevier 2011 Current Applied Physics Vol.11 No.3
Cr<SUB>2</SUB>O<SUB>3</SUB>-TiO<SUB>2</SUB> mixed metal oxides with various compositions were synthesized by sol-gel method and their photocatalytic properties were investigated. A mixture of chromium chloride hexahydrate and titanium butoxide in isopropanol was used as a precursor, and composition was controlled by varying relative concentration of each precursor in a mixture. X-ray diffraction analyses were employed to examine crystalline structure and surface area of synthesized samples was determined by BET method. Optical property of synthesized powders was identified by UV-Vis spectroscopy. Although structure transformation by thermal treatment from anatase to rutile phase was observed for all synthesized samples, the transformation temperature was dependent on composition. Measurement of photocurrent in electrochemical cell was carried out under visible light illumination. It was found that photocatalytic activity under visible light illumination was strongly dependent on sample composition.