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검색결과 2,393건 처리시간 0.034초

Design and Synthesis of Multi Functional Noble Metal Based Ternary Nitride Thin Film Resistors

  • Kwack, Won-Sub;Choi, Hyun-Jin;Lee, Woo-Jae;Jang, Seung-Il;Kwon, Se-Hun
    • 한국진공학회:학술대회논문집
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    • 한국진공학회 2013년도 제44회 동계 정기학술대회 초록집
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    • pp.93-93
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    • 2013
  • In recent years, multifunctional ternary nitride thin films have received extenstive attention due to its versatility in many applications. In particular, noble metal based ternary nitride thin films showed a promising properties in the application of Multifunctional heating resistor films because its good electrical properties and excellent resistance against oxidation and corrosion. In this study, we prepared multifunctional noble metal based ternary nitride thin films by atomic layer deposition (ALD) and plasma-enhanced ALD (PEALD) method. ALD and PEALD techniques were used due to their inherent merits such as a precise composition control and large area uniformity, which is very attractive for preparing multicomponent thin films on large area substrate. Here, we will demonstrate the design concept of multifunctional noble metal based ternary thin films. And, the relationship between microstructural evolution and electrical resistivity in noble metal based ternary thin films will be systemically presented. The useful properties of noble metal based ternary thin films including anti-corrosion and anti-oxidation will be discussed in terms of hybrid functionality.

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Antifungal activity of Saccharomyces cerevisiae peroxisomal 3-ketoacyl-CoA thiolase

  • Lee, Jung-Ro;Kim, Sun-Young;Chae, Ho-Byoung;Jung, Ji-Hyun;Lee, Sang-Yeol
    • BMB Reports
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    • 제42권5호
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    • pp.281-285
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    • 2009
  • Peroxisomes play an important role in cellular defense systems and generate secondary messengers for cellular communication. Saccharomyces cerevisiae containing oleate-induced peroxisomes were subjected to buffer-soluble extraction and two chromatographic procedures, and a protein with antifungal activity was isolated. The results of MALDI-TOF analysis identified the isolated protein as peroxisomal 3-ketoacyl-CoA thiolase (ScFox3). Purified yeast ScFox3 exhibited thiolase activity that catalyzed the thiolytic cleavage of 3-ketoacyl-CoA to acetyl-CoA and acyl-CoA. ScFox3 protein inhibited various pathogenic fungal strains, with the exception of Aspergillus flavus. Using ScFox3-GFP and PTS2 signal-truncated ScFox3M-GFP, we showed that only ScFox3-GFP, with an intact PTS2 peroxisome signal sequence, was able to translocate into peroxisomes. Yeast ScFox3 is a natural antifungal agent found in peroxisomes.

Biodegradable sheath-core biphasic monofilament braided stent for bio-functional treatment of esophageal strictures

  • Han, Cheol-Min;Lih, Eugene;Choi, Seul-Ki;Bedair, Tarek M.;Lee, Young-Jae;Park, Wooram;Han, Dong Keun;Son, Jun Sik;Joung, Yoon Ki
    • Journal of Industrial and Engineering Chemistry
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    • 제67권
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    • pp.396-406
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    • 2018
  • In this study, a polydioxanone (PDO) and poly(L-lactic acid) (PLLA) sheath-core biphasic monofilament was designed to develop an esophageal stent with improved mechanical properties and controlled biodegradability. The radial force of PDO/PLLA sheath-core stent was 10.24 N, while that of PDO stent was 5.64 N. Deteriorations of tensile strength, elastic modulus and elongation during degradation test were also delayed on PDO/PLLA group. Hyaluronic acid-dopamine conjugate and $BaSO_4/PDO$ conjugate coating layers provided improved tissue adhesion strength and reasonable X-ray contrast, respectively. Taken all together, the sheath-core filaments with tissue adhesive and radiopaque properties will be useful in designing esophageal stents.

Image Contrast Enhancement For Displaying Without Fading Under Environment Light

  • Monobe, Yusuke;Yamashita, Haruo;Kurosawa, Toshiharu;Kotera, Hiroaki
    • 한국정보디스플레이학회:학술대회논문집
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    • 한국정보디스플레이학회 2004년도 Asia Display / IMID 04
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    • pp.239-242
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    • 2004
  • This paper presents a novel contrast enhance algorithm for images displayed with bright environment light. This algorithm is designed to preserve local contrast based on the luminance ratio of the pixel to its local surround in attention. This algorithm improves image quality of projectors in a bright room.

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Comparative Study of Stator Core Composition in Transverse Flux Rotary Machine

  • Lee, Ji-Young;Moon, Seung-Ryul;Koo, Dae-Hyun;Kang, Do-Hyun;Lee, Geun-Ho;Hong, Jung-Pyo
    • Journal of Electrical Engineering and Technology
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    • 제6권3호
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    • pp.350-355
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    • 2011
  • This paper deals with the comparison of magnetic characteristics in transverse flux rotary machine according to different stator core composition with the same rotor. Three different stator designs are considered in the analysis according to the material composition of inner and outer stator cores. Electromotive force (EMF), inductance, torque, and core losses are calculated by threedimensional finite element analysis. Calculated and measured results of back-EMF according to the analysis models in dependency on speed are presented.