• Title/Summary/Keyword: HO-1/CO

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Liquid Chromatography-Solid Phase Extraction-NMR (LC-SPE-NMR) Analysis of Liquid Crystalline Mixtures

  • Park, Gregory Hyung-Jin;Park, Ae-Na;Rho, Kyung-Rae;Shin, Jong-Ho;Kim, Yeong-Jeon;Jo, Sung-Chan;Oh, Weon-Sik
    • Journal of the Korean Magnetic Resonance Society
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    • v.15 no.1
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    • pp.14-24
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    • 2011
  • We have performed Liquid Chromatography-Solid Phase Extraction-NMR (LC-SPE-NMR) analysis for liquid crystalline mixture and elucidated the structures of selected components by NMR spectra. Combining the results of one-dimensional 1H experiments as well as homonuclear and heteronuclear two-dimensional experiments, we could analyze the molecular structure of the liquid crystal singles whose structure had not been interpretable by mass spectrometry alone.

Synthesis and Cytotoxic Activity of 1-(1-Benzoylindoline-5-sulfonyl)-4-phenylimidazolidinones

  • Sang-Hun Jung;Hui-Soon Lee;Nam-Soo Kim;Hwan-Mook Kim;Moonsun Lee;Dong-Rack Choi;Jung-Ah Lee;Yong-Ho Chung;Eun-Yi Moon
    • Archives of Pharmacal Research
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    • v.27 no.5
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    • pp.478-484
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    • 2004
  • The novel 1-(1-benzoylindoline-5-sulfonyl)-4-phenyl-4,5-dihydroimidazolones 2 shows highly potent and broad cytotoxicities. Their cytotoxicities against human lung carcinoma A549, human chronic myelogenous leukemia K562, and human ovarian adenocarcinoma SK-OV-3 are compatible with doxorubicin. Compound 2p (1-[(4-aminobenzoyl)indoline-5-sulfonyl])-4-phenyl-4,5-dihydroimidazolone) exhibits a cytotoxicity that is far more potent than doxorubicin and also exhibits highly effective antitumour activities against murine (3LL, Colon 26) and human xenograft (NCI-H23, SW620) tumor models.

Driving technologies for AMOLEDs

  • Matsueda, Yojiro;Kim, Hong-Kwon;Chung, Ho-Kyoon
    • 한국정보디스플레이학회:학술대회논문집
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    • 2006.08a
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    • pp.393-398
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    • 2006
  • This paper classifies driving technologies for AMOLEDs by the driving TFT conditions in pixels. A saturation region operation type driving TFT circuit provides good stability of OLED because of constant current drive. However, complicated compensation circuits are necessary to avoid effect of the TFT characteristics deviation. On the other hand, a linear region operation type driving TFT circuit provides better uniformity of the display image and lower power consumption. However, the stability of OLED is critical because of constant voltage drive.

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Determination of Glimepiride in Human Plasma by LC-MS/MS

  • Kim, Ho-Hyun;Roh, Hyeong-Jin;Lee, Hee-Joo;Han, Sang-Beom
    • Proceedings of the PSK Conference
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    • 2003.04a
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    • pp.282.1-282.1
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    • 2003
  • This study established a sensitive novel Quantification method for detecting glimepiride in human plasma using LC-MS/MS for pharmacokinetic studies. The mobile phase used after degassing was composed of 10 mM ammonium acetate and acetonitrile (20:80, pH 3.0), with flow rate of 200uL/min. One mL plasma were pipetted into glass tubes and spiked with 0.1 mL of internal standard solution. (omitted)

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Microstructural Characteristics of Thermally Sprayed WC-Co Coatings (Thermally Sprayed WC-Co 코팅층의 미세조직 및 특성)

  • Kang, Hee-Soo;Baik, Kyeong-Ho
    • Journal of Powder Materials
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    • v.16 no.1
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    • pp.56-62
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    • 2009
  • The degree of WC decomposition and hardness of thermally sprayed WC-Co coatings are important factors determining the wear resistance of the coatings. In order to minimize the degree of decomposition and to increase hardness, the effects of processing parameters of high velocity oxyfuel(HVOF) spraying on various characteristics of nanostructured WC-12Co coating have been evaluated by an experimental design method. The HVOF sprayed WC-12Co coatings consisted of various carbide phases including WC, $W_2C$ and $W_3Co_3C$, with a much reduced carbon content. The degree of WC decomposition and decarburization was affected by changing barrel length and spray distance. The hardness of WC-Co coatings was strongly related to droplet temperature at substrate, and increased with increasing fuel addition and/or decreasing spray distance. The effective control of processing parameters was discussed in detail for manufacturing a high performance WC-Co coating.

5.0 inch WVGA Top Emission AMOLED Display for PDA

  • Lee, Kwan-Hee;Ryu, Seoung-Yoon;Park, Sang-Il;Ryu, Do-Hyung;Kim, Hun;Song, Seung-Yong;Chung, Bo-Yong;Park, Yong-Sung;Kang, Tae-Wook;Kim, Sang-Chul;Cho, Yu-Sung;Park, Jin-Woo;Kwon, Jang-Hyuk;Chung, Ho-Kyoon
    • 한국정보디스플레이학회:학술대회논문집
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    • 2003.07a
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    • pp.7-10
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    • 2003
  • Samsung SDI has developed a full color 5.0" WVGA AMOLED display with top emission and a super fine pitch of 0.1365mm(l86ppi), the world's highest resolution OLED display ever reported to date. Scan driver circuits and demux circuit were integrated into the display panel, using low temperature poly-Si TFT CMOS technology, and data driver circuit were mounted using COG chips. Peak luminescence was greater than 300cd/ $m^2$ with power consumption of 500mW with 30% of the pixels on illuminated.

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Gamma-Radiolysis of Carbon Dioxide (I). Effect of Addition of Alcohols and Aldehydes (二酸化炭素의 放射線分解 (制1報). 알코올類 및 알데히드類 添加의 影響)

  • Joon Ha Jin;Sang Up Choi;Hyung Chick Pyun;Jae Ho Choi
    • Journal of the Korean Chemical Society
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    • v.26 no.3
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    • pp.135-141
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    • 1982
  • The gamma radiolysis of C$O_2$, in the presence of organic additives, was studied at the total absorbed dose of 6.7 Mrad. Considerable quantity of CO was produced by adding these additives to $O_2$, though no CO was found without them. The maximum G(CO) values of 4.1 and 4.6 were obtained by addition of 0.5% methanol and 0.25% ethanol, respectively. The G(CO) values of 6.3 and 8.4 were noted by the addition of 1% acetaldehyde and 1% formaldehyde, respectively. The maximum CO concentration of 0.65% was obtained by the addition of 1% acetaldehyde at the dose of 40 Mrad.

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