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Kim, Jin-Hee,Kim, Jun-Hoi,Jo, Won-Sam,Ham, Jeong-Gwan,Chung, Il Kyung,Kim, Kyung-Min Springer Berlin Heidelberg 2016 3 Biotech Vol.6 No.2
<P>In this study, a cDNA library was constructed from the total RNA of sweet potato leaves. A total of 789 copies of the cDNA were cloned in <I>Escherichia coli</I> by employing the pGEM-T Easy vector. Sequencing was carried out by Solgent Co. (Korea). As many as 579 expressed sequence tag–simple sequence repeat (EST-SSR) markers were designed (73.38%) from the known cDNA nucleotide base sequences. The lengths of the developed EST-SSR markers ranged from 100 to 499 bp (average length 238 bp). Their motif sequence types were varied, with most being dinucleotides and pentanucleotides, and the most commonly found motifs were CAGAAT (29.0%) and TCT (2.8%). Based on these SSR-containing sequences, 619 pairs of high-quality SSR primers were designed using WebSat and Primer3web. The total number of primers designed was 144. Polymorphism was evident in 82 EST-SSR markers among 20 Korean sweet potato cultivars tested and in 90 EST-SSR markers in the two parents of a mapping population, Yeseumi and Annobeny. In this study, the hexaploid sweet potato (2<I>n</I> = 6<I>x</I> = 90) EST-SSR markers were developed in the absence of full-sequence data. Moreover, by acting as a molecular tag for particular traits, the EST-SSR marker can also simultaneously identify information about the corresponding gene. These EST-SSR markers will allow the molecular analysis of sweet potato to be done more efficiently. Thus, we can develop high-quality sweet potato while overcoming the challenges from climate change and other unfavorable conditions.</P>
Chung, Min Wook,Cha, In Young,Ha, Min Gwan,Na, Youngseung,Hwang, Jungsoo,Ham, Hyung Chul,Kim, Hyoung-Juhn,Henkensmeier, Dirk,Yoo, Sung Jong,Kim, Jin Young,Lee, So Young,Park, Hyun S.,Jang, Jong Hyun Elsevier 2018 Applied Catalysis B Vol.237 No.-
<P><B>Abstract</B></P> <P>The electrochemical conversion of CO<SUB>2</SUB> into useful chemicals such as CO is a promising strategy to reduce CO<SUB>2</SUB> emissions from fossil fuel consumption and to mitigate the impacts of global warming. Although tremendous effort has been devoted to the practical use of CO<SUB>2</SUB>conversion techniques, these techniques still suffer from deficient catalytic activity toward CO<SUB>2</SUB> reduction as well as a complex catalyst synthesis procedure. In this study, an effective strategy to enhance the catalytic CO<SUB>2</SUB> reduction activity with a unique synthesis method is proposed. Polyethylene glycol (PEG)-coated Au nanoparticles supported on a porous carbon support are prepared by a facile, cost-effective, and biocompatible one-step sputtering deposition method, termed liquid medium sputtering. The use of PEG as a liquid medium is advantageous in terms of catalytic activity and stability by producing PEG layers on the Au surface. The prepared PEG-coated Au nanoparticle catalyst exhibits a CO Faradaic efficiency of 100% at −0.57 V<SUB>RHE</SUB> and excellent stability during 10 h of operation due to the high solubility of PEG for CO<SUB>2</SUB>.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Uniform Au nanoparticle synthesis via liquid medium sputtering of in polyethylene glycol solvent. </LI> <LI> Au nanoparticles layered with the polyethylene glycol displays enhanced CO<SUB>2</SUB> reduction activity. </LI> <LI> Polyethylene glycol coated Au exhibits improved stability for CO<SUB>2</SUB> reduction compared to bare Au. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>Polyethylene glycol coated Au nanoparticles showed enhanced electrocatalytic activity toward CO<SUB>2</SUB> reduction reaction likely due to the enhanced CO<SUB>2</SUB> concentration at the catalytic surfaces.</P> <P>[DISPLAY OMISSION]</P>