• Title/Summary/Keyword: 버지니아공과대학교

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Current Status of Digital Library Programs in USA (미국의 디지털 도서관 구축현황)

  • Choi, Ho-Nam
    • Journal of Information Management
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    • v.26 no.3
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    • pp.32-53
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    • 1995
  • A system of networked digital libraries will be a primary component of information infra-structure. The general strategy for digital libraries by the American university libraries is summarized as building of information infrastructure, content database construction, and project-based design. This paper describes the present feature and status of digital libray programs being implemented by the libraries of Michigan University, Carnegie Mellon University and Virginia PolyTech & State University.

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Removal of Diazinon Using Recombinant Biocatalyst (재조합 생촉매를 이용한 Diazinon 제거)

  • Choi, Suk Soon;Seo, Sang Hwan;Kang, Dong Gyun;Cha, Hyung Joon;Kwon, Inchan
    • Applied Chemistry for Engineering
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    • v.22 no.5
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    • pp.486-489
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    • 2011
  • In the present work, diazinon which is known as nondegradable and environmental toxic material was efficiently treated by the cell surface-displayed organophosphorus hydrolase (OPH) biocatalyst. The culture temperature of $25^{\circ}C$ culture temperature and the addition of 0.2 mM ethylenediamine tetraacetate (EDTA) were effective conditions for the production of recombinant OPH in Escherichia coli. 25 and 50 ppm diazinon were treated with removal rate of 4.5 and $7.2mg/g{\cdot}min$, respectively and with all over 90% removal efficiencies using recombinant cell lysates through ultrasonication disruption process. Thus, these experimental results could be utilized in environmental friendly biological treatment system for toxic chemicals such as diazinon.