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權炳善,李起和,韓惠媛 홍익대학교 경영연구소 2002 경영연구 Vol.27 No.-
The purpose of this study is to understand the value and effect of Dance Sport as Sport for all, and to activate Dance Sport for university student. The respondents for this study were sampled among 600 university students in Seoul and the final analysis included responses from 568 respondents. The statistical methods employed in this study are frequency analysis and chi-square test. Results obtained from this research are as followed: 1. It is needed to unify the term, "Dance Sport" for the activation of Dance Sport. 2. University students recognize the value and effects of the Dance Sport as Sport For All positive through the class and most of them want to attend advanced class of Dance Sports. 3. In order to activate Dance Sport as Sport For All, the change of the public recognition of Dance Sport, the proper public information of the government, and the educating qualified leaders are urgently asked.
Kwon, Byoung-Hwa,Jang, Ho Seong,Yoo, Hyoung Sun,Kim, Sung Wook,Kang, Dong Seok,Maeng, Sunglyul,Jang, Dong Seon,Kim, Hyunki,Jeon, Duk Young Royal Society of Chemistry 2011 Journal of materials chemistry Vol.21 No.34
<P>A color-tunable emitter comprising Eu complex-capped ZnSe quantum dot (QD) organic–inorganic hybrid nanocrystals (NCs) was simply synthesized by a hot-injection method, plus the addition of an Eu precursor. Hybrid NCs have the emission of both Eu complexes and ZnSe QDs, and they show bluish white light. In the case of composite NCs (Eu/Zn = 1.0), the emission increases up to 174% compared with that of pristine ZnSe QDs. It is due to the sensitization of the Eu complex acting as an antenna, so the energy obtained by the Eu complexes transfers to the ZnSe QDs. In addition, the NCs have a strong excitation band in the near-UV region, which gives them an advantage over wavelength converters for white light-emitting diodes (LEDs). The expected structure of the hybrid NCs was verified by TEM, XRD, and XPS. It features a zinc blende crystal structure identical to the ZnSe QD, along with Eu-based complexes that can be coordinated with the Se ion on the surface of ZnSe QDs. Therefore, new organic–inorganic hybrid luminescent material using the emission of both QDs and lanthanide (Ln) complexes can potentially serve as a light source in white LEDs.</P> <P>Graphic Abstract</P><P>An Eu complex-capped hybrid ZnSe nanocrystal (NC) has an unique emission from both Eu complexes and ZnSe quantum dots (QDs), exhibiting bluish white-light. The emission from composite NCs increases up to 174% compared with that of pristine ZnSe QDs due to the sensitization of the Eu complex acting as an antenna. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c1jm12091c'> </P>
OLED에서의 전극층/Capping layer/봉지층 간의 Interaction 및 유/무기 복합 봉지막 연구
권병화(Byoung-Hwa Kwon),이현구,주철웅,조현수,임종태 한국고분자학회 2021 한국고분자학회 학술대회 연구논문 초록집 Vol.46 No.1
OLED가 다양한 디스플레이로 응용되기 위해서는 유연하고 얇은 형태의 모양을 가져야 하므로, 이를 위한 소재, 소자 구조 및 공정 기술에 대한 개발이 학계 및 산업계에서 활발히 진행 중이다. OLED는 전극 사이에 유기물이 적층된 구조를 가지며, 해당 유기물은 일반적으로 대기 중의 수분과 산소에 매우 취약한 특성을 가지므로, 이를 차단하기 위한 봉지(Encapsulation) 구조물은 반드시 필요하다. 봉지 구조물의 특성은 주로 무기물 소재의 특성에 좌우되는데, 이러한 무기 봉지 구조물이 얇고, 유연하면서도 우수한 투습 방지 특성을 갖도록 하는 것이 중요하다. 또한, 봉지층을 제작하는 공정이 OLED에 열화를 발생시키지 않고, 광특성 저하를 유발하지 않아야 한다. 본 발표에서는 먼저 OLED에 대한 봉지 구조물로 Atomic Layer Deposition(ALD) 공정에 의한 알루미나 박막을 선택하여 전면발광 OLED에서 상부 전극층, capping layer, 봉지층 간의 상호작용에 대해 연구한 결과를 발표한다. 다음으로는 ALD 공정에 의한 알루미나 박막과 잉크젯 프린팅 공정에 의한 폴리머막으로 구성된 유/무기 복합 봉지막을 OLED에 적용한 연구 결과에 대해 발표한다.
Maltoheptaose and Maltooctaose as the Superior Aroma Encapsulating Agents
Byoung Cheol Min,So Young Kwon,Young Seung Jeon,이병훈,백형희,Kwan-Hwa Park 한국식품과학회 2010 Food Science and Biotechnology Vol.19 No.6
Maltoheptaose (G7) and maltooctaose (G8)were examined as potential encapsulating agents for aroma compounds and compared with commercially available maltodextrins with the dextrose equivalent (DE) 10 and 18. Solutions of each encapsulating agent were homogenized with aromas and spray dried. The initial amounts of aroma compounds retained in each encapsulating agent were as follows: G7<G8≈DE 18<DE 10. During storage at 25℃,G8 was most effective at retaining the aroma compounds among 4 encapsulating agents used in this study, then followed by G7. This result may be due to the high molecular weight and uniform wall matrix composed of either pure G8 or G7 when compared to the commercial maltodextrins that had a broad distribution of molecular weights. Our results suggest that G7 and G8 can serve as excellent encapsulating agents for aroma compounds.
담관계 질환에서 세균 및 Helicobacter 감염과 담즙산 성분의 관계
이병석(Byoung Suk Lee),노임환(Im Hwan Roe),남승우(Seung Woo Nam),유권(Kwon Yoo),박현종(Hyun Jong Park),김정원(Jung Won Kim),신지현(Ji Hyun Shin),이종화(Jong Hwa Lee) 대한내과학회 2001 대한내과학회지 Vol.60 No.3
N/A Background : Bacterial and Helicobacter gene were commonly detected in diseased human bile, although the meaning of the presence of Helicobacter in biliary tract is still unclear. The aim of this study was to evaluate the changes of bile acid composition in bacterial and Helicobacter infected bile, and to determine whether Helicobacter pylori might grow in human bile or not. Methods : Thirty bile samples were obtained by percutaneous transhepatic biliary drainage or gallbladder puncture during cholecystectomy. According to the polymerase chain reaction analysis using bacterial 16S rRNA and Helicobacter genus specific 16S rRNA primers, 3 groups were divided; Group Ⅰ; no presence of any bacterial DNA, Group Ⅱ; positive bacterial DNA only, Group Ⅲ; positive bacterial and Helicobacter DNA. Bile acid analysis for deoxycholic acid (DCA), chenodeoxycholic acid (CDCA), lithocholic acid (LCA), and ursodeoxycholic acid (UDCA) was performed by high performance liquid chromatography. And then Helicobacter pylori was tried to culture in broth mixed with human bile at a final bile concentration of 50%. Results : The concentrations of DCA in group II and III were very low and significantly reduced compared to group I (p<0.01, respectively). The concentrations of LCA or UDCA were not shown any relationships between groups. Helicobacter pylori has grown actively in the broth mixed with human bile containing both of less than 0.1 gm/L of DCA and CDCA, compared to no growth in media mixed with human bile containing more than 3.0 gm/L of DCA and/or CDCA. Conclusion : DCA seems to have the strongest antibacterial effect. Helicobacter pylori is likely to grow in human bile containg very low concentrations of CDCA and DCA.(Korean J Med 60:215-221, 2001)
Fabrication of hexagonally arranged porous carbon films by proton beam irradiation and carbonization
Lee, Byoung-Min,Bui, Van-Tien,Lee, Hwa Su,Hong, Sung-Kwon,Choi, Ho-Suk,Choi, Jae-Hak Pergamon 2019 Radiation physics and chemistry Vol.163 No.-
<P><B>Abstract</B></P> <P>Hexagonally-arranged porous carbon films (HaPCFs) were prepared by proton beam irradiation and carbonization of hexagonally-arranged porous polystyrene films (HaPPSFs). HaPPSFs prepared by an improved phase separation method were irradiated with 150-keV proton beam at a fluence of 4 × 10<SUP>16</SUP> ions cm<SUP>−2</SUP> to enhance the thermal stability for high-temperature carbonization. Proton beam irradiation of HaPPSFs was found to induce crosslinking and surface oxidation reactions. The proton beam-irradiated HaPPSFs were carbonized at 800 °C under an inert atmosphere, resulting in the formation of HaPCFs. The prepared HaPCFs were found to have pseudo-graphitic structures containing both ordered and disordered graphitic structures. The prepared HaPCFs showed a good electrical conductivity.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Hexagonally-arranged porous PS films (HaPPSFs) were prepared by IPS method. </LI> <LI> HaPPSFs were converted to porous carbon films (PCFs) via proton irradiation. </LI> <LI> Proton irradiation induced crosslinking and surface oxidation reactions. </LI> <LI> PCFs were found to have pseudo-graphitic carbon structures. </LI> <LI> PCFs showed a good electrical conductivity of 68.42 S cm<SUP>−1</SUP>. </LI> </UL> </P>