• Title/Summary/Keyword: IkB

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Laboratory Evaluation of the Marking Effect of Sudan Red 7B on Subterranean Termites (Reticulitermes speratus) in Republic of Korea

  • IM, Ik-Gyun;HAN, Gyu-Seong
    • Journal of the Korean Wood Science and Technology
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    • v.48 no.5
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    • pp.745-754
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    • 2020

  • The dye marker Sudan Red 7B was tested as an effective and appropriate marking method for searching the territory of the termite, Reticulitermes speratus, in Korea. The sensitivity of termites to the dye marker was evaluated by measuring the feed consumption amount, survival rate, retention time, and transfer efficiency of R. speratus according to the concentration and feeding period of Sudan Red 7B. As the concentration conditions of dye marker increase, Sudan Red 7B remarkably reduced the feed consumption of the termites. The survival rate was not significantly different from that of the control group (more than 90%), except when feed containing 1% or 2% concentrations of the dye marker was given for five days. The duration of the marking effect persisted for seven days, even at a concentration of 2% dye marker in the feed. No dye transfer by trophallaxis occurred between termites marked with Sudan Red 7B and unmarked termites.

  • https://doi.org/10.5658/WOOD.2020.48.5.745 인용 PDF KSCI

Regulation of the Gene Expression of Airway MUC5AC Mucin through NF-κB Signaling Pathway by Artesunate, an Antimalarial Agent

  • Kyung-il Kim;Rajib Hossain;Jiho Ryu;Hyun Jae Lee;Choong Jae Lee
    • Biomolecules & Therapeutics
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    • v.31 no.5
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    • pp.544-549
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    • 2023

  • In this study, artesunate, an antimalarial agent, was investigated for its potential effect on the gene expression of airway MUC5AC mucin. The human pulmonary epithelial NCI-H292 cells were pretreated with artesunate for 30 min and then stimulated with phorbol 12-myristate 13-acetate (PMA), for the following 24 h. The effect of artesunate on PMA-induced nuclear factor kappa B (NF-kB) signaling pathway was also examined. Artesunate inhibited the glycoprotein production and mRNA expression of MUC5AC mucins, induced by PMA through the inhibition of degradation of inhibitory kappa Bα (IkBα) and NF-kB p65 nuclear translocation. These results suggest artesunate suppresses the gene expression of mucin through regulation of NF-kB signaling pathway, in human pulmonary epithelial cells.

  • https://doi.org/10.4062/biomolther.2023.048 인용 PDF

Electrochemical Oxidation of Hydrogen at Palladium Electrode (팔라디움 전극에서의 전기화학적 수소산화반응)

  • Oh, M.H.;Paik, C.H.;Cho, B.W.;Yun, K.S.;Min, B.C.;Ju, J.B.;Sohn, T.W.
    • Transactions of the Korean hydrogen and new energy society
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    • v.7 no.1
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    • pp.45-54
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    • 1996

  • Electrochemical oxidation of hydrogen on PdOx and Pd electrodes were investigated in aqueous 30% KOH solution at different temperatures and hydrogen concentrations(partial pressures). Anodic reaction by hydrogen on PdOx electrode was mainly due to the oxidation of adsorbed hydrogen at -0.8V~-0.5V(vs. Hg/HgO). For Pd electrode, the anodic reaction was participated by the adsorbed hydrogen on surface, as well as by the metal hydride formed from direct reaction between Pd and hydrogen at -0.5V~0.0V(vs. Hg/HgO). With the increase of hydrogen concentration the charge transfer resistance decreased and the exchange current increased. The transfer coefficient of PdOx and Pd electrodes were found to be 0.78 and 0.72 respectively, which shows the superior reactivity of Pd electrode. The activation energies of PdOx and Pd electrodes decreased with the increase of overpotential and were found to be 23.9~20.3 kJ/mole and 7.2~3.0kJ/mole, respectively.

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A GLOBAL STUDY ON SUBMANIFOLDS OF CODIMENSION 2 IN A SPHERE

  • Hyun, Jong-Ik
    • The Pure and Applied Mathematics
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    • v.3 no.2
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    • pp.173-179
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    • 1996

  • M be an ($n\geq3$)-dimensional compact connected and oriented Riemannian manifold isometrically immersed on an (n ＋ 2)-dimensional sphere $S^{n＋2}$(c). If all sectional curvatures of M are not less than a positive constant c, show that M is a real homology sphere.

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