• Title/Summary/Keyword: TETRA

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A Study on Electrochemical Properties of Acrylate-based Gel Polymer Electrolyte with Ethylene Oxide Group (Ethylene Oxide기를 갖는 Acrylate계 Gel Polymer Electrolyte의 전기화학적 특성에 관한 연구)

  • Kim, Hyun-Soo;Shin, Jung-Han;Moon, Seong-In;Oh, Dae-Hee
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.17 no.6
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    • pp.608-614
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    • 2004

  • The gel polymer electrolyte was prepared by radical polymerization using tetra(ethylene glycol) diacrylate and tri(ethylene glycol) dimethacrylate to investigate affect of the number of ethylene oxide. The gel polymer electrolyte showed good electrochemical stability up to 4.5 V vs. Li/Li and high ionic conductivity at various temperatures. The lithium-ion polymer batteries with the gel polymer electrolyte, tetra(ethylene glycol) diacrylate- and tri(ethylene glycol) dimethacrylate-based, also represented good electrochemical performances such as rate capability, low-temperature performances and cycleability. However, the cell with tri(ethylene glycol) dimethacrylate, which has three ethylene oxide, showed better electrochemical performance.

  • https://doi.org/10.4313/JKEM.2004.17.6.608 인용 PDF KSCI

Synthesis of Octopus Type Trimethylene Glycol β-D-glucopyranosides

  • Kim, Yong Sik;Kadla, John F.
    • Journal of the Korean Wood Science and Technology
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    • v.41 no.2
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    • pp.149-157
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    • 2013

  • The octopus type oligo-hydroxypropylene glycol ${\beta}$-D-glucopyranosides were successfully synthesized in this studies: the sterospecific compound of allyl 2, 3, 4, 6-tetra-O-acetyl-${\beta}$-D-glucopyranosides (1) was deacetylated with NaOMe in MeOH lead to allyl-${\beta}$-D-glucopyranoside (2) which was perallylated and followed by hydroboration and subsequent oxidation afforded (3-hydroxy-propyl) 2, 3, 4, 6-tetraO(3-hydroxy-propyl)-${\beta}$-D-glucopyranoside (4). As a result, not only allylpropylene glycol ${\beta}$-D-glucopyranosides (5, 7, and 9) but also hydroxypropylene glycol ${\beta}$-D-glucopyranosides (6, 8, and 10) were synthesized by repeated sequential perallylation followed by hydroboration/oxidation.

  • https://doi.org/10.5658/WOOD.2013.41.2.149 인용 PDF KSCI

Reaction of Di-s-butoxyborane in Tetrahydrofuran with Selected Organic Compounds containing Representative Functional Groups. Catalytic Effect of Tetraalkoxyborate on the Reaction of Dialkoxyborane$^\dag$

  • Cha, Jin-Soon;Lee, Jae-Cheol;Kim, Jin-Euog;Lee, Kwang-Woo;Yoon, Mal-Sook
    • Bulletin of the Korean Chemical Society
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    • v.8 no.4
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    • pp.304-310
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    • 1987

  • The approximate rate and stoichiometry of the reaction of excess di-s-butoxyborane with selected organic compounds containing representative functional groups under standardized conditions (tetrahydrofuran, $25^{\circ}C)$ were examined in order to define the characteristics of the reagent for selective reductions. And the catalytic effect of lithium tetra-s-butoxyborate on the reaction of di-s-butoxyborane was also studied in order to increase the utility of this reducing system. Di-s-butoxyborane reacts only with simple aldehydes. However the addition of 2.5 mole % of lithium tetra-s-butoxyborate shows the tremendous rate enhancement of reaction for aldehydes, ketones, anhydrides, acid chlorides, lactones, and epoxides. This catalytic effect is assumed to in situ formation of lithium trialkoxyborohydride.

  • https://doi.org/10.5012/bkcs.1987.8.4.304 인용 PDF

영국에 증가하는 갈색계시장 -Peter Lewis씨와 인터뷰-

  • 대한양계협회
    • KOREAN POULTRY JOURNAL
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    • v.12 no.12 s.134
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    • pp.98-99
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    • 1980

  • 한국의 양계산업 시찰차 방한하여 지난 11월 14일 본회를 내방한 Peter Lewis씨는 영국의 Haper Adoms College 를 졸업하고 동대학에서 닭에 대한 NDP 학위와 토끼에 대한 NDR 학위를 받은 바 있으며 현재 Tetra Poultry 농장의 수출책임자로 있다.

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