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Effect of High Temperature Degradation on Microstructure and High Temperature Mechanical Properties of Inconel 617 (Inconel 617의 고온열화에 따른 미세구조 및 고온 기계적 특성)

  • Jo, Tae-Sun;Lee, Seung-Ho;Kim, Gil-Su;Kim, Se-Hoon;Kim, Young-Do
    • Korean Journal of Materials Research
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    • v.17 no.5
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    • pp.268-272
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    • 2007
  • Inconel 617 is a candidate tube material for high temperature gas-cooled reactors(HTGR). The microstructure and mechanical properties of Inconel 617 were studied after exposure at high temperature($1050^{\circ}C$). The dominant oxide layer was Cr-oxide. The internal oxide and Cr-depleted region were observed below the Cr-oxide layer. The depth of Cr-depleted zone and internal oxide increased with exposure time. The major phases of carbides are $M_{23}C_6\;and\;M_6C$. The composition of $M_{23}C_6\;and\;M_6C$ were determined to be Cr-rich and Mo-rich, respectively. $M_6C$ carbide is more stable than $M_{23}C_6$ at high temperature. From the results of high temperature compression test, there were no significant changes in hardness and yield strength upon increasing exposure time.

Production and characterization of monoclonal antibodies against white spot syndrome virus (WSSV) (White spot syndrome virus (WSSV)에 대한 단클론 항체 생산 및 특성 분석)

  • Kyoung-Hui, Kong;Choon-Sup, Kim;Kim, Do-Hyung;Wi-Sik, Kim
    • Journal of fish pathology
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    • v.35 no.2
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    • pp.241-246
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    • 2022
  • White spot syndrome virus (WSSV) is a prevalent and virulent pathogen affecting cultured whiteleg shrimp (Litopenaeus vannamei) in Korea. In this study, seven monoclonal antibodies (mAbs) (10A12, 16C3, 17G4, 21G5, 22C4, 23B6 and 24G6) were produced by using purified WSSV. The reactivity of these mAbs was analysed by Western blot (WB), indirect immunofluorescence (IIF), and lateral flow immunochromatographic assay (LFIA). WB analysis demonstrated that three mAbs (17G4, 22C4, and 23B6) reacted specifically to VP28 with an approximate molecular weight of 24 kDa, mAb 16C3 reacted with approximately 17 kDa. IIF analysis demonstrated specific fluorescence signals on gill tissues of WSSV-infected shrimp, with five mAbs (10A12, 16C3, 22C4, 23B6, and 24G6), pleopods from WSSV-infected shrimp were used for LFIA, where, two mAbs (21G5 and 22C4) exhibited positive reaction. In conclusion, it can be inferred that the mAbs usage and specificity depends on the nature of assay used for diagnosis.

Unions of l-groups

  • Anderson, Marlow;Edwards, C.C.
    • Kyungpook Mathematical Journal
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    • v.23 no.1
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    • pp.91-97
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    • 1983
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