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Junmo Cho,Sujin Park,Chunkeun Lim,Yong Chul Park,Jang Hyun Hur,Soonsung Hong,Thomas M. Brown,Saeyoull Cho 한국응용곤충학회 2008 Journal of Asia-Pacific Entomology Vol.11 No.3
Mutations at V421M and L1029H in the hscp sodium channel gene are known to contribute to knockdown resistance (kdr) in the Woodrow, Dalzell, and PTJ strains of H. virescens (tobacco budworm) from the cotton fields of South Carolina, USA. In the IS6 region of the sodium channel gene, the frequencies of the mutant allele methionine in the Woodrow and Dalzell strains were 0.07 and 0.1, respectively. For the IIS6 region, the frequencies of the mutant allele histidine in Woodrow and Dalzell strains were 0.175 and 0.263, respectively. In the PTJ strain, the frequencies of methionine and histidine alleles were 0 and 0.1, respectively. The Hpy3 allele, which is strongly linked to the histidine mutant allele, was also found in Woodrow and Dalzell strains. In addition, we found a new allele, which is one nucleotide different from Hpy3, called Hpy3-1, and found that it is also linked to histidine. Mutations at V421M and L1029H in the hscp sodium channel gene are known to contribute to knockdown resistance (kdr) in the Woodrow, Dalzell, and PTJ strains of H. virescens (tobacco budworm) from the cotton fields of South Carolina, USA. In the IS6 region of the sodium channel gene, the frequencies of the mutant allele methionine in the Woodrow and Dalzell strains were 0.07 and 0.1, respectively. For the IIS6 region, the frequencies of the mutant allele histidine in Woodrow and Dalzell strains were 0.175 and 0.263, respectively. In the PTJ strain, the frequencies of methionine and histidine alleles were 0 and 0.1, respectively. The Hpy3 allele, which is strongly linked to the histidine mutant allele, was also found in Woodrow and Dalzell strains. In addition, we found a new allele, which is one nucleotide different from Hpy3, called Hpy3-1, and found that it is also linked to histidine.
Scaling of binding affinities and cooperativities of surfactants on carbon nanotubes
Park, Minsuk,Park, Junmo,Lee, Jiyun,Ju, Sang-Yong Elsevier 2018 Carbon Vol.139 No.-
<P><B>Abstract</B></P> <P>High-end applications of single-walled carbon nanotube (SWNT) require detailed understanding of their binding affinity (<I>K</I> <SUB>d</SUB>) with surfactants. Here, we quantitatively determined the comprehensive <I>K</I> <SUB>d</SUB> and aggregation number (γ) of nine nonionic and anionic surfactants according to SWNT chirality. Photoluminescence (PL)-based titration using flavin mononucleotide (FMN)-SWNT complexes showing the largest redshifted optical transition enabled quantitative comparison of the surfactants and displayed distinct first and second regimes which correspond to partial and full replacements of FMN, respectively. Especially, the second transition exhibited sigmoidal PL change whose middle point denoted by the inverse of <I>K</I> <SUB>d</SUB> slightly differs from critical micelle concentration of surfactant alone, depending on its functional groups. Moreover, nonionic surfactants displayed larger <I>K</I> <SUB>d</SUB> and lower γ values than the anionic did. Specifically, <I>K</I> <SUB>d</SUB> values between Pluronic F108 and sodium dodecyl sulfonate differ by four orders of magnitude. Such differences were rationalized in terms of the occupied volume of the micelle based on the hydrodynamic volume and γ. During the replacement, <I>K</I> <SUB>d</SUB> and γ were affected by the degree of surfactant rearrangement induced by aging process, leading to more stable complex. Scaling the interactions between surfactant and SWNT provides useful guidelines to design novel SWNT sorting method using more than two surfactants.</P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Koo, Junmo,Ha, Daegeun,Park, Damdae,Roh, Hyun-Joon,Ryu, Sangwon,Kim, Gon-Ho,Baek, Kye Hyun,Han, Chonghun Pergamon Press 2017 Computers & chemical engineering Vol.100 No.-
<P><B>Abstract</B></P> <P>With the advent of more than Moore’s law era, control of plasma etch process is expected to become inevitable. Given that highly complex plasma is a medium of etch processes, plasma parameters are key factors to be controlled. In addition, highly interactive plasma characteristics require multivariate control schemes. In this paper, we design a multi-loop controller which controls effective plasma parameters in Ar plasma conditions. The effective plasma parameters obtained by optical emission spectroscopy are paired with plasma reactor instrumental variables through relative gain array and singular value decomposition. Each single input-single output (SISO) system based on the pairing result shows successful disturbance rejection performance but interactions between SISO controllers occur. In order to handle the interactions, 2×2 multiple input-multiple output (MIMO) controllers with and without decouplers are simulated to track set point change. Based on the simulations, a MIMO controller with decouplers is implemented in a capacitively coupled plasma reactor and show feasible control performance without interaction. Hopefully, the results introduced in this paper contribute to making progress in plasma parameter control.</P> <P><B>Highlights</B></P> <P> <UL> <LI> We propose plasma parameter controllers by using a non-invasive OES, which can be applicable to semiconductor manufacturing environment without any process and hardware perturbation. </LI> <LI> The selected plasma parameters such as electron density and electron temperature can be controlled in a single input and single output fashion through variable selection from RGA and SVD techniques. </LI> <LI> Multi-loop MIMO schemes which can compensate interactions from plasma are proposed in plasma parameter control. </LI> </UL> </P>
Sangwook Park,한권덕,Junmo Koo,Hyung Jong Choi,Joon Hyung Shim 한국정밀공학회 2019 International Journal of Precision Engineering and Vol.6 No.5
In this study, wind-battery hybrid power systems are designed, evaluated, and optimized for regular supply of electrical power at a designated minimum load level with no shortage. Our simulation uses lead-acid batteries and vanadium redox flow batteries (VRBs) for storage, and utilizes hourly wind speed data measured in 2012 at Mt. Taegi in South Korea. Twenty Vestas V80 wind turbines, each rated at 2 MW, are used as power generators, on the basis of an actual wind turbine project recently installed at Mt. Taegi. Sale to the main grid of electricity generated in excess of the minimum load offset the initial capital costs for installation of the wind turbines and batteries. Results show that the optimized wind-VRB hybrid system can supply more than 9 MW of regular electrical power at no cost. Even higher levels of production are profitable with sale of the wind-generated electricity directly to a demand site at a price greater than the price of sales to the main grid. A reduction in the VRB electrolyte costs and an increase in carbon taxes can also increase profitability.