• Title/Summary/Keyword: bio technology

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In vitro Anti-Tyrosinase Activity of Viscumneoside III and Homoflavoyadorinin B Isolated from Korean Mistletoe (Viscum album)

  • Park, Cheolson;Kim, Jaehyun;Hwang, Woonsang;Lee, Bo Duk;Lee, Kooyeon
    • Korean Journal of Plant Resources
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    • v.29 no.6
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    • pp.690-698
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    • 2016
  • Various bioactive substances are found in mistletoe, including viscumneoside III (1) and homoflavoyadorinin B (2), both which inhibit tyrosinase. These two compounds are mainly found in the EtOAc fraction of the mistletoe extract and demonstrate higher rates of tyrosinase inhibition than ascorbic acid, which was used as a control. Our results suggest that mistletoe extracts can be utilized in skin whitening cosmetics.

The synthesis and light absorbing properties of heptamethine cyanine chromophores based on benzoxazole derivatives

  • Youn, Hye-Soo;Park, Soo-Youl;Shin, Seung-Rim;Shin, Joung-Il;Oh, Seong-Geun;Jun, Kun
    • Proceedings of the Korean Society of Dyers and Finishers Conference
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    • 2008.10a
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    • pp.133-134
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    • 2008
  • A novel near infrared(NIR) absorbing dyes were synthesized by using bis-aldehyde formyl aromatic compounds and heteroaryl derivatives with the reactive methylene group. These dyes provided a range of the NIR wavelength region about 720 nm value. Also, the light absorbing properties of these dyes were investigated in our experiment results. In generally, these NIR colorants may be potential used for optical recording media, DNA sequencing probe and laser beam printings.

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The Synthesis and Evaluation of Squarylium Dyes Based On the NIR Spectra Region

  • Park, Soo-Youl;Shin, Seung-Rim;Shin, Joung-Il;An, Kyoung-Lyong;Jun, Kun
    • Proceedings of the Korean Society of Dyers and Finishers Conference
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    • 2008.10a
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    • pp.131-132
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    • 2008
  • Several squarylium dyes, derived from benzothiazole and indoles, were synthesized as a potential NIR dyes with absorption in the 700-900 nm region. These chromophores were induced much more bathochromic shift in the absorption maximum of the compound relative to the neutral parent squarylium dyes which we were described before. The squaryliums offer a convenient way of linking the dye to functional substrates and may be an advantage to be potential chromophores for NIR-absorbing, NIR-Cut-off filter, PDT(Photo Dynamic Therapy) materials.

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A Study on the Emission Characteristics for Blended Power Bio-Fuel Oil (발전용 바이오중유의 혼합비율에 따른 배출가스 특성 연구)

  • HA, JONG-HAN;JEON, CHEOL-HWAN;KWON, YONG-CHAI
    • Transactions of the Korean hydrogen and new energy society
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    • v.26 no.5
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    • pp.484-492
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    • 2015
  • As our government is actively introducing the RPS (Renewable Portfolio Standards) as a national renewable energy obligation policy, power producers are using the various renewable energy to meet the RPS supply quota since 2012. Recently, it is appling to use power bio-fuel oil in bio-fuel oil demonstration project with power companies. In general, power bio-fuel oils are composed of mixture products of vegetable oil, animal fat, fatty acid ester and waste oil. It is already developing for a power plant as a renewable energy abroad. In Korea, it is studying a 100% combustion and blended combustion of heavy fuel oil and bio-fuel oil. In this study, we investigated fuel characteristics of mixed power bio-fuel oil and its emission performance. Especially, it was reduced emissions of bio-oil in industrial boilers due to bio-fuel properties as compare with fuel oil.

Blockchain ETH 2.0 Platform Analysis for Efficient BIoT Development (효율적인 BIoT 개발을 위한 블록체인 ETH 2.0 플랫폼 분석)

  • Lee, YongJoo;Woo, Sung-Hee
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2021.05a
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    • pp.499-501
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    • 2021
  • The steady investment and development in the fourth industry led to the development of IoT technology, which led to the dissemination of platform-based blockchain technology that could provide the necessary security platform. BIoT, a blockchain-based IoT application, requires blockchain platform technology that provides more sophisticated security, scalability, and efficiency in order to be applied to more diverse fields in the future. In this paper, we analyze the recently announced smart contract ETH 2.0 to compare the requirements for existing BIoT development and to predict the future of BIoT in the future.

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