• Title/Summary/Keyword: bio materials

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Experimental Evaluation of Far Infrared Characteristic for Bio Liquid Ceramics used in Bulding finishing Materials (액상세라믹의 원적외선 특성의 실험적평가)

  • 지철근;최태섭;장성일
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.16 no.6
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    • pp.7-12
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    • 2002
  • This paper presents the Experimental Evaluation for the physical, chemical property and Far Infrared Characteristic, the effects to the living body of liquid ceramics which was made by the a Bio ceramic(co).

Study on Fuel Characteristics Depending on Mixing Ratio of Bio-Butanol and Bio-Ethanol (바이오부탄올, 바이오에탄올 혼합비율에 따른 연료적 특성 연구)

  • KIM, SHIN;KIM, JAE-KON;PARK, CHEON-KYU;HA, JONG-HAN
    • Transactions of the Korean hydrogen and new energy society
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    • v.28 no.6
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    • pp.704-711
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    • 2017
  • Korea, which has a high dependency on energy imports, is greatly affected by fluctuations in international oil prices. In order to offset these effects, various policies such as 'diversification of energy sources' and 'energy mix' are being pursued. Renewable Fuel Standard (RFS) is a policy promoted for this purpose, and a compulsory mixing system is applied only to the diesel. In order to reduce dependence on fossil fuels in various countries, they are concentrating on the dissemination of bio-alcohol as well as bio-diesel, and commercialization through various verification. In this study, evaluation of domestic materials and vehicles was carried out to promote domestic bio alcohol fuel. We analyzed the fuel characteristics of domestic quality standard items by mixing them with gasoline of automobile at a certain mixing ratio (0%, 3%, 6%, and 10%).

Fabrication of Multi-layered Macroscopic Hydrogel Scaffold Composed of Multiple Components by Precise Control of UV Energy

  • Roh, Donghyeon;Choi, Woongsun;Kim, Junbeom;Yu, Hyun-Yong;Choi, Nakwon;Cho, Il-Joo
    • BioChip Journal
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    • v.12 no.4
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    • pp.280-286
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    • 2018
  • Hydrogel scaffolds composed of multiple components are promising platform in tissue engineering as a transplantation materials or artificial organs. Here, we present a new fabrication method for implementing multi-layered macroscopic hydrogel scaffold composed of multiple components by controlling height of hydrogel layer through precise control of ultraviolet (UV) energy density. Through the repetition of the photolithography process with energy control, we can form several layers of hydrogel with different height. We characterized UV energy-dependent profiles with single-layered PEGDA posts photocrosslinked by the modular methodology and examined the optical effect on the fabrication of multi-layered, macroscopic hydrogel structure. Finally, we successfully demonstrated the potential applicability of our approach by fabricating various macroscopic hydrogel constructs composed of multiple hydrogel layers.

The Synthesis and Characterization of Mesoporous Microbead Incorporated with CdSe/ZnS QDs (양자점이 고밀도화된 마이크로 비드의 제조 및 특성)

  • Lee, Ji-Hye;Hyun, Sang-Il;Lee, Jong-Huen;Koo, Eun-Hae
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.25 no.8
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    • pp.657-663
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    • 2012
  • The spherical mesoporous silica is synthesized and incorporated with CdSe/ZnS quantum dots(QDs) for preparing micro beads to detect toxic and bio-materials with high sensitivity. The spherical silica beads with the brunauer-emmett-telle(BET) average pore size of 15 nm were prepared with a ratio 1, 3, 5-trimethylbenzen, as a swelling agent, to the block-copolymer template surfactant of over 1 and under vigorous mixing condition. The surface of spherical mesoporous silica is modified using octadecylsilane for incorporating QDs. Based on photoluminescence(PL) spectra, the relative brightness of mesoporous silica beads incorporated with 10 nM of QDs is 79,000 times brighter than that of Rodamine 6 G.