• Title/Summary/Keyword: Oxidizing solution

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Evaluation of Electrolyzed Oxidizing Water as a Control Agent of Cucumber Powdery Mildew

  • Lee, Yong-Hwan;Cha, Kwang-Hong;Ko, Sook-Ju;Park, In-Jin;Park, Boung-In;Seong, Ki-Young
    • The Plant Pathology Journal
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    • v.16 no.4
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    • pp.206-210
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    • 2000
  • The effect of the electrolyzed oxidizing water on Sphaerotheca fuliginea was investigated with germination and sporulation of the fungal conidia. The sporulation was inhibited by the electrolyzed oxidizing water of pH 2.5, 3.5, and 4.5, but was not inhibited by the distilled water adjusted pH with 1N-HCL solution. However, the electrolyzed oxidizing water did not affect conidial germination. The oxidation-reduction potential at pH 2.5 and pH 3.5 of electrolyzed oxidizing water were 1130 mV and 1060 mV, respectively, but those of distilled water adjusted with HCL solution were 550 mV and 490 mV, respectively. When the electrolyzed oxidizing water of ORP over 1100 mV was sprayed on cucumplanting, the disease severities of powdery mildew were about 8.5% and 19.2%, respectively. Disease severity of a standard control (triflumizole 30% WP, $500\textrm{mg}\textrm{/L}$) was about 3.0%, while that of plants without electrolyzed oxidizing water was to 45.8%.

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Preparation of$Ni_xFe_{3-x}O_4$ Films by the Ferrite Plating and Their Magnetic Properties (페라이트 도금법에 의한 $Ni_xFe_{3-x}O_4$ 박막의 제조와 자기적 성질)

  • 하태욱;이정식;김일원
    • Journal of the Korean Magnetics Society
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    • v.8 no.5
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    • pp.295-299
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    • 1998
  • The magnetic thin films can be prepared without vacuum process and under the low temperature(<100 $^{\circ}C$) by ferrite plating. We have performed ferrite plating of $Ni_xFe_{3-x}O_4$ (x=0.162~0.138) films on cover glass at the substrate temperature 80 $^{\circ}C$ and pH range of the oxidizing solution, 7.1~8.8. the crystal structure of the samples has been identified as a single phase of polycrystal spinel structure by x-ray diffraction technique. The deposition rate and the grain size of the film increased with the pH of oxidizing solution. The coercive force (H_C)$ decreased with the pH of oxidizing solution.

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The Properties and Manufacturing of $Fe{3-X}-Ni_XO_4$Films by Spin-Spray Ferrite Method (스핀스레이법 의한 $Fe{3-X}-Ni_XO_4$ 페라이트 박막의 제작과 그 특성)

  • 김명호;장경욱;부정기
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.11 no.8
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    • pp.652-657
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    • 1998
  • We have performed spin-spray ferrite plating of $Fe{_3}{-X}-Ni_XO_4$(X=0.17~0.26) films in the temperature region $T=80~95[^{\circ}C]$. A reaction solution and an oxidizing solution were supplied to a reaction chamber by supply pump. The solubility limit of Ni increases as the substrate temperature increase, from X=0.17 at $80[^{\circ}C]$ to X=0.26 at $95[^{\circ}C]$. All the films are polycrystalline with no preferential orientation, and the magnetization exhibits no definite anisotropy. Grain size in the films increases as X increases, reaching $0.87[\mu{m}]$ at X=0.26.

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The Simultaneous removal of NOx using Wet Scrubber (습식 스크러버를 이용한 NOx 제거에 관한 연구)

  • Kim, Jae-Gang;Lee, Ju-Yeol;Park, Byung Hyun;Choi, Jin-Sik
    • Journal of the Korean Applied Science and Technology
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    • v.32 no.2
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    • pp.296-301
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    • 2015
  • The experiment was performed for in order to remove NOx which is generated in the Ship's engine. it was performed test in order to remove NOx which is generated in the Ship's engine. It was used as the oxidizing agent sodium chlorite. Use the oxidizer is nitrogen monoxide was oxidized to nitrogen dioxide. and was tested pH adjustment to increase the efficiency of oxidizing. An aqueous solution of sodium hydroxide was used for the nitrogen dioxide absorbent. Low concentration of the solution, it showed a high efficiency. improves the absorption efficiency by add additives.

Reuse potential of spent RO membrane for NF and UF process

  • Ng, Zhi Chien;Chong, Chun Yew;Sunarya, Muhammad Hamdan;Lau, Woei Jye;Liang, Yong Yeow;Fong, See Yin;Ismail, Ahmad Fauzi
    • Membrane and Water Treatment
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    • v.11 no.5
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    • pp.323-331
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    • 2020
  • With the increasing demand on reverse osmosis (RO) membranes for water purification worldwide, the number of disposed membrane elements is expected to increase accordingly. Thus, recycling and reuse of end-of-life RO membranes should be a global environmental action. In this work, we aim to reuse the spent RO membrane for nanofiltration (NF) and ultrafiltration (UF) process by subjecting the spent membrane to solvent and oxidizing solution treatment, respectively. Our results showed that solvent-treated RO membrane could perform as good as commercial NF membrane by achieving similar separation efficiencies, but with reduced water permeability due to membrane surface fouling. By degrading the polyamide layer of RO membrane, the transformed membrane could achieve high water permeability (85.6 L/㎡.h.bar) and excellent rejection against macromolecules (at least 87.4%), suggesting its reuse potential as UF membrane. More importantly, our findings showed that in-situ transformation on the spent RO membrane using solvent and oxidizing solution could be safely conducted as the properties of the entire spiral wound element did not show significant changes upon prolonged exposure of these two solutions. Our findings are important to open up new possibilities for the discarded RO membranes for reuse in NF and UF process, prolonging the lifespan of spent membranes and promoting the sustainability of the membrane process.

The Inhibition of TREK2 Channel by an Oxidizing Agent, 5,5'-dithiobis (2-nitrobenzoic acid), via Interaction with the C-terminus Distal to the 353rd Amino Acid

  • Park, Kyoung-Sun;Bang, Hyo-Weon;Shin, Eun-Young;Kim, Chan-Hyung;Kim, Yang-Mi
    • The Korean Journal of Physiology and Pharmacology
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    • v.12 no.4
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    • pp.211-216
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    • 2008
  • TREK (TWIK-RElated $K^+$ channels) and TRAAK (TWIK-Related Arachidonic acid Activated $K^+$ channels) were expressed in COS-7 cells, and the channel activities were recorded from inside-out membrane patches using holding potential of - 40 mV in symmetrical 150 mM $K^+$ solution. Intracellular application of an oxidizing agent, 5,5'-dithio-bis (2-nitrobenzoic acid) (DTNB), markedly decreased the activity of the TREK2, and the activity was partially reversed by the reducing agent, dithiothreitol (DTT). In order to examine the possibility that the target sites for the oxidizing agents might be located in the C-terminus of TREK2, two chimeras were constructed: TREK2 (1-383)/TASK3C and TREK2 (1-353)/TASK3C. The channel activity in the TREK2 (1-383)/TASK3C chimera was still inhibited by DTNB, but not in the TREK2 (1-353)/TASK3C chimera. These results indicate that TREK2 is inhibited by oxidation, and that the target site for oxidation is located between the amino acid residues 353 and 383 in the C-terminus of the TREK2 protein.

Phase analysis of simulated nuclear fuel debris synthesized using UO2, Zr, and stainless steel and leaching behavior of the fission products and matrix elements

  • Ryutaro Tonna;Takayuki Sasaki;Yuji Kodama;Taishi Kobayashi;Daisuke Akiyama;Akira Kirishima;Nobuaki Sato;Yuta Kumagai;Ryoji Kusaka;Masayuki Watanabe
    • Nuclear Engineering and Technology
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    • v.55 no.4
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    • pp.1300-1309
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    • 2023
  • Simulated debris was synthesized using UO2, Zr, and stainless steel and a heat treatment method under inert or oxidizing conditions. The primary U solid phase of the debris synthesized at 1473 K under inert conditions was UO2, whereas a (U, Zr)O2 solid solution formed at 1873 K. Under oxidizing conditions, a mixture of U3O8 and (Fe, Cr)UO4 phases formed at 1473 K, whereas a (U, Zr)O2+x solid solution formed at 1873 K. The leaching behavior of the fission products from the simulated debris was evaluated using two methods: the irradiation method, for which fission products were produced via neutron irradiation, and the doping method, for which trace amounts of non-radioactive elements were doped into the debris. The dissolution behavior of U depended on the properties of the debris and aqueous solution for immersion. Cs, Sr, and Ba leached out regardless of the primary solid phases. The leaching of high-valence Eu and Ru ions was suppressed, possibly owing to their solid-solution reaction with or incorporation into the uranium compounds of the simulated debris.

The Manufacturing and Properties of Spinel Ferrite Film In Aqueous Solution (수용액에서의 스피넬형 자성박막의 제작과 그 특성)

  • Kim, M.H.;Jang, K.U.;Choi, M.K.
    • Proceedings of the KIEE Conference
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    • 1999.11a
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    • pp.4-6
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    • 1999
  • We have performed spin-spray ferrite plating of $Fe_{3-x}Zn_xO_4$($X=0.47{\sim}0.97$) films in the temperature region T=85[$^{\circ}C$]. A reaction solution and an oxidizing solution were supplied to a reaction chamber by supply pumps. The Zn composition X in the $Fe_{3-x}Zn_xO_4$ Film increases as the content of $ZnCl_2$ increase, from X=0.47 at O.05[g/l] to X=0.97 at 0.15[g/l]. All the films are polycrystalline with no preferential orientation, and the magnetization exhibits no definite anisotropy. Grain size in the films increases as X increases, reaching 0.98[${\mu}m$] at X=0.97.

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The Characteristics of Iron(Fe) Floc Formation for Treatment of Acid Mine Drainage (산성 광산 배수의 처리를 위한 철(Fe) 성분의 플럭 형성 특성)

  • Song, Kun-Ho;Lee, Kwang-Rae
    • Journal of Industrial Technology
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    • v.33 no.A
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    • pp.89-92
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    • 2013
  • The characteristics of floc formation of the iron(Fe) ions was studied for developing the process treating the acid mine drainage. The metal ions in aqueous solution oxidized with oxygen in air, which generated hydrogen ion and lowered the pH of the aqueous solution. The iron(Fe) ions were formed into flocs by the acid-base reaction with the added $Ca(OH)_2$ for the neutralizing the solution. There were several variables affecting the formation, size and color of floc; whether air was present or not, air feeding rate, oxidizing time, concentration of $Ca(OH)_2$, the acid-base reaction time of the $iron(Fe)-Ca(OH)_2$. For proper formation of the $iron(Fe)-Ca(OH)_2$ flocs and developing the floc treating system, the control variables mentioned above should be considered.

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