• Title/Summary/Keyword: 양호일지

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The Surface Sealing Performance of Film, Air cap and Polystyrene foam for Preventing Carbonation of High-Volume Slag Concrete (고로슬래그 미분말 다량치환 콘크리트의 탄산화 억제를 위한 기밀성 향상재 부착효과)

  • Han, Dongyeop;Kim, Kyunghoon;Han, Min-Cheol
    • Journal of the Korea Institute of Building Construction
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    • v.15 no.1
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    • pp.9-16
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    • 2015
  • The goal of this research was evaluating and suggesting the solution of preventing carbonation of concrete replaced high-volume of slag. The concrete mixtures were prepared with high-volume slag and recycled aggregate, and the concrete samples were evaluated the carbonation depth with various surface treatment methods. For various surface treatment methods and surface protecting sheets, bonding strength and carbonation depth were measured. Basically, from the results, the carbonation of concrete was completely prevented with any type of surface treatment method and surface protecting sheet as far as the surface treatment materials were remained. Therefore, in this research, it was known and suggested that the easiness of handling and sufficient bonding performance was much important than the quality of surface protecting sheets.

Study on characteristic of mycelial culture in ear mushroom (목이의 균사생육 특성에 관한 연구)

  • Yu, Young-Jin;Choi, Kyu-Hwan;Jeong, Jong-Seong;Lee, Gi-Kwon;Choi, So-Ra
    • Journal of Mushroom
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    • v.11 no.1
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    • pp.15-20
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    • 2013
  • This study was performed to obtain the scientific data an artificial culture of ear mushroom(Auricularia auricula). Liquid cultural of Auricularia auricula. mycelium was characterized with respect to temperature, pH, compositions of inorganic, carbon and nitrogen. The its optimum temperature and media pH were at $25^{\circ}C$ and pH 5.0~6.0 on the mycelial growth, respectively. The optimum inorganic compositions and concentration for mycelial growth were $MgSO_4$ 0.05%(w/v) and $KH_2PO_4$ 0.1%(w/v), respectively. The optimum carbon sources and nitrogen sources were black-sugar 2%(w/v) and soybean powder at 0.3~0.5%(w/v) with7 days optimum culture time.

In vitro Mass Propagation of Ardisia pusilla DC. (산호수 (Ardisia pusilla DC.)의 기내 대량번식)

  • Kang Gwan-Ho;Oh Owel-Sun;Goo Dae-Hoe;Eun Jong-Seon;Kim Hyung-Moo
    • Journal of Plant Biotechnology
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    • v.32 no.4
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    • pp.281-285
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    • 2005
  • To establish the mass proliferation system of Ardisia pusilla DC, the shoot tips of Ardisia pusilla DC were cultured on the MS and half-strength MS medium supplemented with $0{\sim}5.0$ mg/L BA or $0{\sim}0.5$ mg/L thidiazuron(TDZ), respectively. A few multiple shoot formation observed when the shoots were cultured on MS medium containing TDZ. However, the frequency of multiple shoot formation was reached up to 82.4%, when the shoots were cultured on half-strength MS medium supplemented with 0.5 mg/L BA. Also the number of shoot per explant was 7.1. To promote rooting from multiple shoot, newly formed shoots were transferred to half-strength MS medium containing 0.5 mg/L IBA or 0.5 mg/L NAA, respectively. Regenerated plantlets were grown to normal mature plants in soil.