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Choe, Yun-Seo,Yi, Mi Hye,Kim, Ji-Heung,Kim, Yun Ho,Jang, Kwang-Suk The Royal Society of Chemistry 2016 Physical chemistry chemical physics Vol.18 No.12
<P>This study investigates a spin-coating method for modifying the surface properties of a poly(ethylene-alt-maleic anhydride) (PEMA) gate insulator. The 60 nm-thick PEMA thin film exhibits excellent electrical insulating properties, and its surface properties could be easily modified by surface grafting of octylamine. Due to surface treatment via spin-coating, the surface energy of the PEMA gate insulator decreased, the crystal quality of the organic semiconductor improved, and consequently the performance of low-voltage organic thin-film transistors (TFTs) was enhanced. Our results suggest that the surface treatment of the PEMA gate insulator could be a simple and effective method for enhancing the performance of organic TFTs.</P>
국내산 새우 중하(Metapenaeus joyneri)에 대한 특이 IgE 항체 측정 및 알레르겐 규명
윤성호 ( Yun Seong Ho ),최정희 ( Choe Jeong Hui ),서유진 ( Seo Yu Jin ),서창희 ( Seo Chang Hui ),남동호 ( Nam Dong Ho ),김윤근 ( Kim Yun Geun ),민경업 ( Min Gyeong Eob ),박해심 ( Park Hae Sim ) 대한내과학회 2003 대한내과학회지 Vol.65 No.2
Background : Shrimp is one of the major causative crustacean food allergen. An investigation has been reported that tropomyosin belonged to muscle protein is a major allergen within shrimp. But there have been a few investigations on shrimp allergen in Ko
Design and Manufacture of Robotic Exoskeleton Hands Using 3-D Printer
Choe, Jong-Hun,Jo, Seong-Hyeon,Seo, Suk-Hyun,Kim, Won-Hoe,Hyun, Ji-Eum,Lee, Hong-Kyu,Kim, Yun-Haek,Park, Se-Ho Korean Society for Engineering Education 2014 공학교육연구 Vol.17 No.4
Robotic exoskeletons are kind of wearable robots enabling operators to amplify the force. There are several possible applications in plenty of options: to put very heavy products into right positions for assemblies, to rescue people from natural disasters, and to work for medical rehabilitation etc. In this study, the exoskeleton hands were designed and fabricated using 3-D printer. It would be the good case of application of 3-D printer to design and fabricate the exoskeleton hands.
포스터 전시 : 간 ; 우심부전과 유전성 구형적혈구증으로 발생한 심한 간비종대 1예
서석민 ( Seo Seog Min ),김창욱 ( Kim Chang Ug ),박찬권 ( Park Chan Gwon ),남순우 ( Nam Sun U ),장우임 ( Jang U Im ),최종영 ( Choe Jong Yeong ),윤승규 ( Yun Seung Gyu ),최상욱 ( Choe Sang Ug ),정규원 ( Jeong Gyu Won ),선희식 ( Seon 대한소화기학회 2003 대한소화기학회 추계학술대회 Vol.2003 No.-
<증례> 54세 여자가 내원 12시간 전부터 발생한 발열과 오한, 우상복부 동통을 주소로 응급실로 내원하였다. 과거력상 어려서부터 비장종대가 있었으나 특별한 검사 없이 지내다가 내원 2년전 호흡곤란으로 심장비대와 담석이 있다는 사실을 알고 약물치료 중 이었다. 내원당시 혈압은 120/80㎜Hg, 맥박은 분당 100회, 호흡은 분당 24회, 체온은 38.0℃였고, 창백하면서 황달이 있었다. 심음은 규칙적이었으나 강도 4정도의 수축기 잡음이 심첨과 흉골좌측
조골세포수 MC3T3-E1 세포기능에 대한 갑상선 호르몬의 영향
윤현구 ( Yun Hyeon Gu ),우정택 ( U Jeong Taeg ),김진우 ( Kim Jin U ),김영설 ( Kim Yeong Seol ),김광원 ( Kim Gwang Won ),최영길 ( Choe Yeong Gil ),서광식 ( Seo Gwang Sig ) 대한내과학회 1993 대한내과학회지 Vol.44 No.1
연구배경 : 갑상선호르몬은 골격계 성장, 발달 및 대사에 중요한 영향을 미치며 조골세포 및 파골세포를 모두 자극하는 것으로 알려졌으나, 골형성에 미치는 직접적인 영향은 아직 확실히 규명되어 있지않다. 본 연구에서는 조골세포의 특성을 지닌 조골세포주 MC3T3-E1를 이용하여 T_3를 여러 농도로 첨가하여 DNA 합성, 교원질합성 및 Ⅰ형 교원질 mRNA 발현능 비교와 부갑상선호르몬에 대한 cAMP 반응을 측정하여 T3의 조골세포에 미치는 영향을 비교하였다. 방법 : 10% FBS(fetal bovine serum)이 첨가된 aMEM으로 배양한 후 0.1% FBS와 여러 농도의 T3를 첨가하였다. DNA 합성은 [^3H] thymidine incorporation과 교원질합성은 [^3H] proline incorporation을 이용하여 관찰하였으며, Ⅰ형 교원질 mRNA 발현능은 Northern blot 분석하였다. 결과 : 부갑성호르몬에 대한 조골세포의 반응 증가를 확인하였으며, Northern blot을 이용한 Ⅰ형 교원질 mRNA의 크기는 6.4kb로 발현됨을 관찰하였다. T_3를 세포배지에 첨가하여 DNA 합성과 교원질합성 비율은 농도증가에 따라 유의한 차이가 없었다. T_3에 의한 Ⅰ형 교원질 mRNA 발현은 농도 변화에 따른 유의한 차이가 없었다. 결론 : 조골세포주 MC3T3-EI 세포는 부갑성선호르몬의 자극에 cAMP의 증가 및 6.4kb의 Ⅰ형 교원질 mRNA 발현으로 조골세포의 특성이 관찰되어 골대사 연구에 유용한 세포로 생각된다. 이 세포를 이용한 연구에서 T_3는 MC3T3-E1 세포에 대해 DNA 합성, 교원질 합성비율 및 전사부위에 영향을 미치지 않았으나 갑상선 호르몬 농도와 노출시간을 달리한 추시가 필요할 것으로 생각된다. Background : Thyroid hormone appears to stimulate both the osteoclast and the osteoblast, but is direct effect on bone formation its not yet clear. This study was designed to investigate the effects of triiodothyronine(T_3) on DNA synthesis, collagen protein synthesis and type Ⅰ collagen transcript levels in osteoblastlike MC3T3-E1 cells. Methods : The cells used in the present experiments were found to be PTH-responsive in terms of cAMP formation. The cells were cultured in a-MEM supplemented with 10% fetal bovine serum (FBS) and then changed to 0.1% FBS with various concentration of triiodothyronine. DNA synthesis was studied by examing effects on the incorporation of [^3H] thymidine into DNA, collagen synthesis was determined by studying into the incorporation of [^3H] proline into collagenase digestible protein (CDP) and noncollagen protein (NCP).Type Ⅰ collagen mRNA expression was studied by Northern blot analysis. Results : Northern blot analysis showed the presence of 6.4 kb type Ⅰ collagen transcript in control and T_3-treated cultures. From this study. There was no significant differences in DNA synthesis and percentage of collagen synthesized between T_3-treated cells and control. Northern blot analysis of T_3-treated cells, using a type Ⅰ a_2 collagen probe, revealed no significant changes in type Ⅰ collagen transcripts. Conclusion : In MC3T3-E1 cells, which responded to PTH by increasig cAMP formation, the presence of 6.4 kd type Ⅰ collagen transcript was found. Thus MC3T3-E1 cells are a useful model for the investigation of osteoblastic cells. Based on the data, T_3 exerted no significant effects on DNA, collagen synthesis and transcript levels in osteoblast like MC3T3-E1 cells.
지구성 운동이 노화 흰쥐 심근조직의 SOD와 MDA활성도에 미치는 영향
윤진환(Yun Jin Hwan),정일규(Jeong Il Gyu),김영표(Kim Yeong Pyo),최대원(Choe Dae Won),김종오(Kim Jong O),서태범(Seo Tae Beom),김원섭(Kim Won Seob) 한국사회체육학회 2003 한국사회체육학회지 Vol.19 No.2
The purpose of this study was to investigate the effects of 8-week endurance exercises on SOD and MDA of the heart tissue in aging rats. Thirty Sprague-Dawley rats were randomly assigned into three groups: Baseline Group(n=10), Control Group(n=10), and Exercise Group(n=10). The rats were provided with the same environment. The Exercise Group was consisted of running on a for 8 weeks for 30min once a day, at a speed of 5m/min for the first 5min, main exercise at a speed of 20m/min for the next 20min, then at a speed 5m/min for the last 5min, 0% grade, 5days per weeks. Following 8 weeks, the heart tissue of rats were analyzed to determine the change of SOD and MDA activities. Statistical techniques for data analysis were one-way ANOVA to determine the difference among groups. The 5% level of significance was used as the critical level for acceptance of hypotheses for the study. The analysis of data revealed the following findings. There was significant difference in SOD between Group(p<.05). The results of post hoc test, SOD activities in exercise group following 8 weeks endurance exercise were significantly increased than baseline and control group. There was significant difference in MDA between group(p<.05). The results of post hoc test, MDA in control group were significantly increased than baseline group and exercise group. These results indicated that endurance exercise following 8 weeks does provide an positive effects on SOD and MDA activities in aged-rats.