• Title/Summary/Keyword: Kim SeJoo

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A Study of Characteristics Comparison with Polyimide in LCOS Microdisplay

  • Kim, Su-Gun;Kim, Ji-Hyun;Lee, Sang-Shin;Kim, Joo-Hyung;Cho, Chul-Shik
    • 한국정보디스플레이학회:학술대회논문집
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    • 2002.08a
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    • pp.891-894
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    • 2002

  • We studied characteristics of polyimide (PI) about Liquid Crystal on Silicon (LCOS) microdisplay. In order to compare two kinds of PI and choose one PI, we measured some items. First, we measured thermal imidization of SE-7492, SE-5291 (Nissan) PI using FT-IR. The results of thermal imidization are same 85%for SE-7492 and 86% for SE-5291. The second, we measured voltage-holding ratio (VHR) of LCOS imager using two kinds PI and one liquid crystal (LC) that is a mixture developed by Merck. The third, we measured contrast ratio (C/R) of LCOS imager using function generator from ov to 4V. The results of VHR and C/R are higher LCOS imager using SE-7492 than LCOS imager using SE-5291. And last we measured response time and the result is same two types LCOS Imagers. So, we choose PI of LCOS imager and concluded that LC is much better matched of PI using SE-7492.

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Hg(0) Removal Using Se(0)-doped Montmorillonite from Selenite(IV)

  • Lee, Joo-Youp;Kim, Yong Jin
    • Bulletin of the Korean Chemical Society
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    • v.34 no.12
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    • pp.3767-3770
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    • 2013

  • Potassium methylselenite ($KSeO_2(OCH_3)$) was reduced to elemental selenium, Se(0), and then doped onto montmorillonite K 10 (MK10) clay to examine the interaction between elemental mercury (Hg(0)) vapor and Se(0) in an effort to understand the possible heterogeneous reaction of Hg(0) vapor and Se(0) solid. The clay was used as a cost-effective support material for uniform dispersion of Se(0). The Se(0)-doped MK10 showed an excellent reaction performance with Hg(0) under an inert nitrogen gas at 70 and $140^{\circ}C$ in our lab-scale fixed-bed system. However, the precursor, $KSeO_2(OCH_3)$-doped MK10 showed a negligible reaction performance with Hg(0), suggesting that the oxidation state of selenium plays a key role in the reaction of Hg(0) vapor and selenium compounds.

  • https://doi.org/10.5012/bkcs.2013.34.12.3767 인용 PDF KSCI KPUBS HTML

Influence of Aspirin on Pilocarpine-Induced Epilepsy in Mice

  • Jeong, Kyoung Hoon;Kim, Joo Youn;Choi, Yun-Sik;Lee, Mun-Yong;Kim, Seong Yun
    • The Korean Journal of Physiology and Pharmacology
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    • v.17 no.1
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    • pp.15-21
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    • 2013

  • Aspirin (acetylsalicylic acid) is one of the most widely used therapeutic agents based on its pharmacological actions, including anti-inflammatory, analgesic, anti-pyretic, and anti-thrombotic effects. In this study, we investigated the effects of aspirin on seizure susceptibility and hippocampal neuropathology following pilocarpine-induced status epilepticus (SE). SE was induced by pilocarpine hydrochloride (280 mg/kg, i.p.) administration in C57BL/6 mice (aged 8 weeks). Aspirin was administered daily (15 mg/kg or 150 mg/kg, i.p.) for 10 days starting 3 days before SE, continuing until 6 days after SE. After pilocarpine injection, SE onset time and mortality were recorded. Neuronal cell death was examined using cresyl violet and Fluoro-Jade staining, and glial responses were observed 7 days post SE using immunohistochemistry. In the aspirin-treated group, the onset time of SE was significantly shortened and mortality was markedly increased compared to the control group. However, in this study, aspirin treatment did not affect SE-induced neuronal cell death or astroglial and microglial responses in the hippocampus. In conclusion, these results suggest that the safety of aspirin should be reevaluated in some patients, especially with neurological disorders such as temporal lobe epilepsy.

  • https://doi.org/10.4196/kjpp.2013.17.1.15 인용 PDF KSCI