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특수 콘크리트를 이용한 공원시설 관련 제품에 관한 연구
박봉우,김진아,신애란,전병건 강원대학교 석재복합신소재제품연구센터 1996 석재연 논문집 Vol.1 No.-
본 연구는 특수 콘크리트를 사용하여 공원시설 관련 제품을 생산하기 위한 기초 자료를 얻을 목적으로 수행하였다. 현재 국내에서 생산하여 사용되고 있는 공원 관련 시설물을 대상으로 소재에 대한 선호도와 소재의 특성을 우편을 통한 설문 조사를 하였다. 설문의 결과 가장 선호하는 소재는 목재, 인조목, 철금속, 비철금속, 석재 등의 순서로 나타났다. 재료 별 특성은 12개 공원 관련 시설과 7개 시멘트 콘크리트 제품을 대상으로 재료별로 10개 항목에 대한 특성을 조사하여 matrix로 나타내었다. 이렇게 조사된 결과를 토대로 하여 공원 관련 제품 생산을 위한 시험적인 모델로 특수 콘크리트를 사용한 블라드와 콘크리트 판넬의 모형을 제시하였다. The purpose of this study was to obtain basic information in order to produce of park facility products using by special concrete. This study made a survey of preference and character of the raw materials on park facility products throughout the country by mail questionnaire. As a result, the ranking of preference on raw materials were wood, imitation wood made from cement concrete, steel, and nonferrous metal. Also, the 10 characters of raw material on the 12 items of park facility products and 7 items of cement concrete products investigated and their results showed by matrix. Based on these results we suggest the pilot models of bollard and concrete panel for pedestrian using special concrete.
Kim, Ae Rhan,Park, Chul Jin,Vinothkannan, Mohanraj,Yoo, Dong Jin Elsevier 2018 Composites. Part B, Engineering Vol.155 No.-
<P><B>Abstract</B></P> <P>The organic/inorganic hybrid membranes consisting of different concentrations of phosphotungstic acid (PWA) in sulfonated poly ether sulfone (SPES) were constructed for the usage as electrolyte in proton exchange membrane fuel cells (PEMFCs). The repulsion applied between the hydrophilic moieties of host and guest components resulted in the porosity of prepared composite membranes. The as-made membranes demonstrated the prompt thermal stability and validated its applications in elevated temperature operation of PEMFCs. When the concentration of PWA was increased to 30 wt% in sulfonated polyether sulfone, the ionic conductivity of the corresponding membrane was increased to 19 mS/cm at room temperature, presumably due to the inherent conductivity of the PWA molecules and the enhanced acidity of sulfonic acid groups in the membranes. The SPES/PWA composite membrane (IEC 1.74 meq/g) comprising 30 wt% of PWA exhibited a maximum ionic conductivity of 116 mS/cm at 90 °C under 100% relative humidity (RH). The as-made SPES/PWA-30 composite membrane exhibited the maximum PEMFC power density of 305 mW/cm<SUP>2</SUP>, which validated its potential applications in PEMFCs.</P> <P><B>Highlights</B></P> <P> <UL> <LI> New SPES/PWA type composite electrolyte had been successfully fabricated. </LI> <LI> SPES/PWA exhibited enhanced water absorption and ionic conductivity. </LI> <LI> The as-made SPES/PWA composite membrane was applied as potential electrolyte in PEMFC. </LI> <LI> The enhanced ionic conductivity and active PWA additive promoted performance of PEMFC to higher extent. </LI> </UL> </P>
Kim, Sung-Sik,Chang, Ji-Ae,Kim, Ae-Rhan,Cho, Kyung-Won,Park, Sang-Kyu Korean Society of Photoscience 2005 Journal of Photosciences Vol.12 No.2
It was found that 1,4-diketones such as 1,4-diphenyl-l,4-butanediones containing N,N-dimethylaminophenyl (pDPB) and N,N-dimethylaminonaphthyl (nDPB) at C2 are converted into 3-(4-dimethylaminoaryl)-1-phenylpropan-lones (pPPA and nPPA) by treatment with $Ca(OH)_2$ in methanol, which was easily oxidized to enone, i.e., 3-(4-dimethylaminophenyl)-l-phenylpropenones (pPPE and nPPE), when treated with 2,3-dichloro-5,6-dicyano-l,4-benzoquinone (DDQ) in dichloromethane.
Photoaddition Reactions of 1 , 4 Diphenylbut -1-EN-3-YNE to Quinones
Kim, Sung-Sik,Kim, Ae-Rhan,Chang, Ji-Ae,Mah, Yoon-Jung,Lim, Jin-Sun,Yoo, Dong-Jin,Jeon, Il-Cheol Korean Society of Photoscience 1999 Journal of Photosciences Vol.6 No.1
Irradiation of 1 , 4-diphenylbut-1-en-3-yne 1 and some p-quinones in dichloromethane with 300nm UV light yield tow types of adducts, i.e., p-quinomethanes and cyclobutanes, in which the former were produced via the rearrangement of the intially formed spiro-oxetene intermediates. On the other hadn 1 added to o-quinones to give three types of adducts, i.e., 1, 3-dienes, 1, 4-dioxenes, or spiro-oxetanes, in which the former were found to be applied to synthesize phenanthrene derivatives. A methoxy derivative of enyne 39 was synthesized to investigate the type of thephotoaddition to o-quinones, in which 1, 4-dioxenes were obatained.
Kim, Sung-Sik,Chang, Ji-Ae,Kim, Ae-Rhan,Mah, Yoon-Jung,Kim, Hyun-Jin,Kang, Chan Korean Society of Photoscience 2000 Journal of Photosciences Vol.7 No.3
Irradiation of 1,3-cyclohexanedione and p-benzoquinone in methanol gave 3-methoxycyclohex-2-en-1-one. Allyl derivative of the 1,3-diketone was prepared as enol from and irradiated in methanol in the presence of p-benzoquinone to give the same type of photoproduct, i.e., 2-allyl-3-methoxycyclohex-2-en-1-one. Allyldibenzoylmethane was synthesized and irradiated with p-benzoauinone in methanol but no remarkable amount of photoproduct was obtained.
Direct Detection System for <i>Escherichia coli</i> Using Au–Ag Alloy Microchips
Kim, Wan-Joong,Kim, Sanghee,Kim, Ae Rhan,Yoo, Dong Jin American Chemical Society 2013 INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH - Vol.52 No.22
<P>Au–Ag alloy nanoparticles (NPs) were prepared by the reduction of metal ion mixtures in aqueous sodium citrate solution using sodium borohydride (NaBH<SUB>4</SUB>). The resulting Au–Ag alloy NPs were analyzed by various techniques. Alloy-attached chips for the detection of microorganisms were fabricated simply by the attachment of Au–Ag alloy nanoparticles onto glass slides after silanization through self-assembled monolayers (SAMs) for the formation of activated amine (−NH<SUB>2</SUB>) as a terminal function group. The alloy-attached chips were investigated for their ability to bind the target <I>Escherichia coli</I> (<I>E. coli</I>) in water. <I>E. coli</I> was detected in water as a function of time and concentration by UV–vis spectroscopic measurements based on the interaction between the alloy-attached chip and <I>E. coli</I>. Field-emission scanning electron microscopy (FE-SEM) was used to directly observe the <I>E. coli</I> captured on the alloy chips. These studies demonstrated that <I>E. coli</I> in drinking water can be directly detected with Au–Ag alloy microchips without requiring any interaction between an antibody and an antigen.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/iecred/2013/iecred.2013.52.issue-22/ie3022797/production/images/medium/ie-2012-022797_0007.gif'></P>