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Jeong, Namjo,Kim, Han-ki,Kim, Won-sik,Choi, Ji Yeon,Han, Ji-hyung,Nam, Joo-youn,Hwang, Kyo Sik,Yang, SeungCheol,Jwa, Eun-Jin,Kim, Tae-Young,Park, Soon-Chul,Seo, Yong-Seog,Kim, Sung-in Elsevier 2019 Chemical engineering journal Vol.356 No.-
<P><B>Abstract</B></P> <P>The direct integration of two-dimensional nanostructures into macroscopic porous carbon substrates is essential for their practical use in potential applications, which is a big challenge due to the difficulty of securing uniform coating layers. In this work, we demonstrate a very simple and effective method for the direct coating of MoS<SUB>2</SUB> onto the surface of porous carbon structures having nano-sized pores, such as vertically aligned carbon nanotube arrays. A uniform coverage of MoS<SUB>2</SUB> over carbon substrates was achieved by chemical vapor deposition of gaseous species derived from starting precursors in a closed reactor. Transmission electron microscopy images, X-ray diffraction data, and Raman spectra confirmed the formation of highly crystalline MoS<SUB>2</SUB> layers. X-ray photoelectron and energy dispersive X-ray spectroscopies revealed highly uniform MoS<SUB>2</SUB> layers over the whole surface of the carbon substrates. Our approach is also applicable for the synthesis of MoS<SUB>2</SUB>/carbon fiber paper (CFP) hybrid structures. The electrochemical tests showed that the as-synthesized MoS<SUB>2</SUB>/CFP structures can serve as highly active cathodes for reverse electrodialysis.</P> <P><B>Highlights</B></P> <P> <UL> <LI> MoS<SUB>2</SUB>@VCNT and MoS<SUB>2</SUB>@CFP were prepared in this work. </LI> <LI> Uniform MoS<SUB>2</SUB> coating was achieved by CVD of gaseous species in the closed reactor. </LI> <LI> This approach is very powerful for MoS<SUB>2</SUB> coating over macroscopic porous substrates. </LI> <LI> MoS<SUB>2</SUB>/CFP can be a highly active cathode for reverse electrodialysis. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Mating Behavior and Analysis of Sex Pheromone Components in Ascotis selenaria
Kyungsan Choi,Dong Soon Kim,Jae Ho Jwa,Kyung ha Kang,Kyung Sik Han,Sung Won Joe 한국응용곤충학회 2009 한국응용곤충학회 학술대회논문집 Vol.2009 No.05
Ascotis selenaria, one of the major Geometridae moths, annually damages the citrus leaves and fruits. This study was focused to identify the sex pheromone components of A. selenaria in order to monitoring and control its population. Adult female and male were usually emerged at the time between 2 hour before and 2 hour afterlights-off in 16L:8D photoperiod. Mating, irrespective in female age, started at 2 hour after lights-off and peaked between 4 hour and 6 hour after lights-off. They copulated for 3 hour 47 min per pair. Gland extract of virgin female was analyzed with GC-MS and GC-EAD.Z,Z-6,9-3,4 epoxy nonadecadiene (Z,Z-6,9-3,4 epo- 19Hy) was identified as the candidate. Both of stereo isomer, Z,Z-6,9-3R,4S epo- 19Hy and Z,Z-6,9-3S,4R epo- 19Hy, showed a strong EAG response in male antennae. Further study like field attraction test should be needed to clarify the sex pheromone composition and in A. selenaria. Age and time were related with the amount of sex pheromone components biosynthesized in A. selenaria gland. 0 day old female had 112.7ng per gland at 5 hour after lights off and the amount was decreased as they aged. The sex pheromone biosynthesis started from lights-off and showed the increasing tendency during scotophase.
Jwa, Eunjin,Yun, Yeo-Myeong,Kim, Hanki,Jeong, Namjo,Park, Soon-Chul,Nam, Joo-Youn Elsevier 2019 INTERNATIONAL JOURNAL OF HYDROGEN ENERGY - Vol.44 No.2
<P><B>Abstract</B></P> <P>High hydrogen production rate and energy recovery were accomplished in a tubular microbial electrolysis cell (MEC) equipped with a robust membrane electrode assembly (MEA). The current and the hydrogen production of non-flexible MEAs, simply fabricated by directly brushing a catalyst on a self-supporting tubular membrane, were compared with those of a typical MEA, where a cathode is physically combined with a membrane. Current of 34 ± 2 mA (1.79 ± 0.05 A/m<SUP>2</SUP>) and coulombic efficiency of 98.5 ± 1.0% were achieved in non-flexible MEAs, outperforming the typical MEA under fed-batch mode. The MEA, having a durable coating layer, also showed an enhanced hydrogen production rate and electric energy recovery with values of 0.18 ± 0.03 m<SUP>3</SUP>/m<SUP>3</SUP>-d and 151.9 ± 1.0%, respectively, even for low strength domestic wastewater (dWW) treatment in the continuous-flow mode. These outcomes were similarly maintained in the case of using seawater, which is a good candidate for an economical and environmentally suitable catholyte.</P> <P><B>Highlights</B></P> <P> <UL> <LI> An MEC equipped with a robust MEA was used for domestic wastewater treatment. </LI> <LI> Current of 34 mA and coulombic efficiency of 98.5% were achieved in a robust MEA. </LI> <LI> The system showed a high hydrogen production rate (0.18 m<SUP>3</SUP>/m<SUP>3</SUP>-d) and an electric energy recovery (151.9%). </LI> <LI> When seawater was supplied as the catholyte, the current and hydrogen production of MEC were maintained. </LI> </UL> </P>
Cloning and Expression of a Rice cDNA Encoding a Lls1 Homologue of Maize
Jwa, Nam-Soo,Park, Sang-Geun,Park, Chan-Ho,Kim, Soon-Ok,Ahn, Il-Pyung,Park, Sook-Young,Yoon, Choong-Hyo,Lee, Yong-Hwan The Korean Society of Plant Pathology 2000 Plant Pathology Journal Vol.16 No.3
A cDNA (Oslls1) encoding Lls1-homologue of maize was isolated from cDNA library of rice (Oryza sativa cv. Ilpum). The 2,138 bp of full length Oslls1 clone contains an open reading frame of 1,623 nucleotides encoding 575 amino acid residues. The deduced amino acid sequence of Oslls1 has a high level of homology with chlorophyll a oxygenases of Arabidopsis thaliana (67%) and Marchantia polymorpha (65%). Southern blot analysis of genomic DNA indicates the existence of a small gene family for Oslls1 in the rice genome. The expression of Oslls1 mRNA was induced in leaves and germinating seeds. Treatment of $H_2O$$_2$significantly down-regulated Oslls1 expression. The expression of Oslls1 mRNA was consititutively down-regulated in the blm, a rice mutant exhibiting spontaneous necrotic lesions. These results suggest that this Oslls1 gene may be involved incell death mechanisms in the blm mutant of rice.