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Synthesis of Naringenin Amino Acid Esters as Potential CDK2 Inhibitors
Kim, Jin-Young,Lee, Young-Shim,Kim, Ho-Jung,Kang, Seock-Yong,Park, Kwang-Su,Cho, Jun-Ho,Lee, Yun-Yeong,Kim, Byeong-Soo,Lim, Yoong-Ho,Chong, You-Hoon Korean Chemical Society 2005 Bulletin of the Korean Chemical Society Vol.26 No.12
Kim, Ji Hoon,Kim, Chang Hyo,Yoon, Hyeonseok,Youm, Je Sung,Jung, Yong Chae,Bunker, Christopher E.,Kim, Yoong Ahm,Yang, Kap Seung The Royal Society of Chemistry 2015 Journal of Materials Chemistry A Vol.3 No.39
<▼1><P>Electrochemically active binary metal oxide nanosheets on the surface of electrically conductive and porous carbon nanofibers exhibited a high pseudo-capacitive performance.</P></▼1><▼2><P>The hybridization of an electrochemically active metal oxide with electrically conductive carbon nanofibers (CNFs) has been utilized as a solution to overcome the energy density limitation of carbon-based supercapacitors as well as the poor cyclic stability of metal oxides. Herein, we have demonstrated the growth of binary metal oxide nanosheets on the engineered surface of CNFs to fully exploit their electrochemical activity. Metal oxide nanosheets were observed to grow vertically from the surface of CNFs. The high structural toughness of the CNF–metal oxide composite under strong sonication indicated strong interfacial binding strength between the metal oxide and the CNFs. The rationally designed porous CNFs presented a high specific surface area and showed high capacity for adsorbing metal ions, where the active edge sites acted as anchoring sites for the nucleation of metal oxides, thereby leading to the formation of a well dispersed and thin layer structure of binary metal oxide nanosheets. Excellent electrochemical performance (<I>e.g.</I>, specific capacitance of 2894.70 F g<SUP>−1</SUP> and energy density of 403.28 W h kg<SUP>−1</SUP>) was observed for these binary metal oxide nanosheets, which can be attributed to the large increase in the accessible surface area of the electrochemically active metal oxide nanosheets due to their homogeneous distribution on porous CNFs, as well as the efficient charge transfer from the metal oxide to the CNFs facilitated the improvement in the performance.</P></▼2>
Kim, Hee-Soo,Oh, Yoong,Kang, Ki Hoon,Kim, Ju Hwan,Kim, Joosun,Yoon, Chong Seung American Chemical Society 2017 ACS APPLIED MATERIALS & INTERFACES Vol.9 No.19
<P>All-solid-state Li-rechargeable batteries using a 500 nm-thick LiCoO2 (LCO) film deposited on two NASICON-type solid electrolyte substrates, LICGC (OHARA Inc.) and Li1.3Al0.3Ti1.7(PO4)(3) (LATP), are constructed. The postdeposition annealing temperature prior to the cell assembly is critical to produce a stable sharp LCO/electrolyte interface and to develop a strong crystallographic texture in the LCO film, conducive to migration of Li ions. Although the cells deliver a limited discharge capacity, the cells cycled stably for SO cycles. The analysis of the LCO/electrolyte interfaces after cycling demonstrates that the sharp interface, once formed by proper thermal annealing, will remain stable without any evidence for contamination and with minimal intermixing of the constituent elements during cycling. Hence, although ionic conductivity of the NASICON-type solid electrolyte is lower than that of the sulfide electrolytes, the NACSICON-type electrolytes will maintain a stable interface in contact with a LCO cathode, which should be beneficial to improving the capacity retention as well as the rate capability of the all-solid state cell.</P>
O-Methyltransferase from Soybean Uses Both Caffeoyl-CoA and Flavonoids as Substrates
Kim, Dae-Hwan,Kim, Bong-Gyu,Park, So-Hyun,Kim, Na-Yeon,Lee, Yoon-Jung,Min, Shin-Young,Park, Yong-Bae,Lee, Jung-Bok,Kim, Jong-Chan,Lim, Yoong-Ho,Chong, You-Hoon,Ahn, Joong-Hoon The Korean Society for Applied Biological Chemistr 2009 Applied Biological Chemistry (Appl Biol Chem) Vol.52 No.2
A gene encoding O-methyltransferase (SOMT)-10 from soybean, SOMT-10, was cloned by reverse transcription polymerase chain reaction. Phylogenetic analysis revealed that SOMT-10 belonged to caffeoyl-CoA O-methyltransferase (CCoAOMT) and contained conserved catalytic residues found in CCoAOMT. SOMT-10 was expressed in Escherichia coli as a glutathione S-transferase fusion protein and purified to determine its substrate. Several compounds including caffeoyl-CoA, naringenin, quercetin, caffeic acid, kaempferol and luteonin were tested as substrates for the purified recombinant SOMT-10. Analysis of reaction products using high performance liquid chromatography revealed that SOMT-10 used caffeoyl-CoA, quercetin and luteolin as substrates. This result indicated that SOMT-10 used flavones having vicinal hydroxyl groups. The methylation position was determined to be the 3' hydroxyl group. It is likely that SOMT-10 is a new class of OMT that uses not only caffeoyl-CoA, but also flavonoids. Molecular docking of tricetin with the modeled structure SOMT-10 disclosed that SOMT-10 showed all combinations of the O-methylated products.
Notes : An Antifungal Property of Burkholderia ambifaria Against Phytopathogenic Fungi
( Chul Hoon Lee ),( Min Woo Kim ),( Hye Sook Kim ),( Joong Hoon Ahn ),( Yong Sub Yi ),( Kyung Rae Kang ),( Young Dae Yoon ),( Gyung Ja Choi ),( Kwang Yun Cho ),( Yoong Ho Lim ) 한국미생물 · 생명공학회 2006 Journal of microbiology and biotechnology Vol.16 No.3