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[PB-0073] 무(Raphanus sativus L.) 품종의 표현형적 특성과 heterozygosity 간의 상관관계 분석
Hui Yeon Hong(Hui Yeon Hong),Jun Ho Lee(Jun Ho Lee),Yoon Ah Jang(Yoon Ah Jang),Jin Hee Kim(Jin Hee Kim),Ji Won Kim(Ji Won Kim),Ji Hyeon Lim(Ji Hyeon Lim),Hye Won Yu(Hye Won Yu),Won Byoung Chae(Won Byo 한국육종학회 2022 한국육종학회 공동학술발표집 Vol.2022 No.-
[PB-0071] GBS 분석을 통한 국내 무(Raphanus sativus L.) 품종의 유전적 유연관계 분석
Hui Yeon Hong(Hui Yeon Hong),Jun Ho Lee(Jun Ho Lee),Yoon Ah Jang(Yoon Ah Jang),Jin Hee Kim(Jin Hee Kim),Ji Won Kim(Ji Won Kim),Ji Hyeon Lim(Ji Hyeon Lim),Hye Won Yu(Hye Won Yu),Won Byoung Chae(Won Byo 한국육종학회 2022 한국육종학회 공동학술발표집 Vol.2022 No.-
Hong, Yu-Rim,Mhin, Sungwook,Kim, Kang-Min,Han, Won-Sik,Choi, Heechae,Ali, Ghulam,Chung, Kyung Yoon,Lee, Ho Jun,Moon, Seong-I.,Dutta, Soumen,Sun, Seho,Jung, Yeon-Gil,Song, Taeseup,Han, HyukSu The Royal Society of Chemistry 2019 Journal of materials chemistry. A, Materials for e Vol.7 No.8
<P>It has recently been demonstrated that the OER activity of transition metal sulfides (TMSs) could be enhanced by the introduction of a thin amorphous layer on a pristine surface. We report here a novel strategy to enhance the OER by developing cobalt nickel sulfide (CoxNi1−xS2, CNS) with a high density of crystalline and amorphous phase boundaries. Electrochemical activation (ECA) can partially amorphize hollow CNS nanoparticles derived from surface-selective sulfidation. The ECA-treated CNS (ECA-CNS) electrocatalyst, which is comprised of CNS nanodots separated by thin amorphous layers, shows high densities of crystalline and amorphous phase boundaries. This catalyst shows superior OER catalytic performance with a current density of 10 mA cm<SUP>−2</SUP> at a small overpotential of 290 mV, a low Tafel slope of 46 mV dec<SUP>−1</SUP>, a high mass activity of 217 A g<SUP>−1</SUP>, a high turnover frequency of 0.21 s<SUP>−1</SUP> at an overpotential of 340 mV, and excellent stability in alkaline media.</P>
Hong, Yun-Gi,Moon, Yu-Mi,Hong, Ju-Won,No, So-Young,Choi, Tae-Rim,Jung, Hye-Rim,Yang, Soo-Yeon,Bhatia, Shashi Kant,Ahn, Jung-Oh,Park, Kyung-Moon,Yang, Yung-Hun Elsevier 2018 Enzyme and microbial technology Vol.118 No.-
<P><B>Abstract</B></P> <P>Glutaric acid is one of the promising C5 platform compounds in the biochemical industry. It can be produced chemically, through the ring-opening of butyrolactone followed by hydrolysis. Alternatively, glutaric acid can be produced via lysine degradation pathways by microorganisms. In microorganisms, the overexpression of enzymes involved in this pathway from <I>E. coli</I> and <I>C. glutamicum</I> has resulted in high accumulation of 5-aminovaleric acid. However, the conversion from 5-aminovaleric acid to glutaric acid has resulted in a relatively low conversion yield for unknown reasons. In this study, as a solution to improve the production of glutaric acid, we introduced <I>gabTD</I> genes from <I>B. subtilis</I> to <I>E. coli</I> for a whole cell biocatalytic approach. This approach enabled us to determine the effect of co-factors on reaction and to achieve a high conversion yield from 5-aminovaleric acid at the optimized reaction condition. Optimization of whole cell reaction by different plasmids, pH, temperature, substrate concentration, and cofactor concentration achieved full conversion with 100 mM of 5-aminovaleric acid to glutaric acid. Nicotinamide adenine dinucleotide phosphate (NAD(P)<SUP>+</SUP>) and α-ketoglutaric acid were found to be critical factors in the enhancement of conversion in selected conditions. Whole cell reaction with a higher concentration of substrates gave 141 mM of glutaric acid from 300 mM 5-aminovaleric acid, 150 mM α-ketoglutaric acid, and 60 mM NAD<SUP>+</SUP> at 30 °C, with a pH of 8.5 within 24 h (47.1% and 94.2% of conversion based on 5-aminovaleric acid and α-ketoglutaric acid, respectively). The whole cell biocatalyst was recycled 5 times with the addition of substrates; this enabled the accumulation of extra glutaric acid.</P> <P><B>Highlights</B></P> <P> <UL> <LI> The first <I>E. coli</I> whole cell bioconversion from 5-aminovalerate to glutaric acid. </LI> <LI> Finding of critical factors for GabTD reaction. </LI> <LI> Achievement of high bioconversion rate over 90% based on α-ketoglutarate concentration. </LI> <LI> Repetitive use of whole cell biocatalyst to accumulate more glutaric acid. </LI> </UL> </P>