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진공창호시스템 부위별 표면온도 분포 및 결로 발생 특성에 관한 실험연구
정창호(Jeong, Chang-Ho),박재성(Park, Jae-Sung),여명석(Yeo, Myoung-Souk),김광우(Kim, Kwang-Woo) 대한건축학회 2013 대한건축학회논문집 Vol.29 No.10
In this study, characteristics of the surface temperature and condensation on a window were assessed, using vacuum insulated glass units produced by the in-vacuum chamber method. For this purpose, mock-up test was performed, based on the result of preliminary study about the test methods of the surface condensation resistance performance of a window system. A general double glass window(DG Window) was selected as an alternative for comparison. As a result, in the same location, the surface temperature of the vacuum insulated glass window(VIG Window) was 4~6 ℃ higher, in comparison with a general DG window. The surface temperature on the center of glass in the VIG window was higher than that on the frame, because of the thermal performance of the vacuum insulated glass(VIG). On the other hand, the surface temperature on the edge of glass in the VIG window was still lower (0.9~1.5℃), than that on the frame. Therefore, for improvement of the surface temperature distribution in a VIG window, a strategy to reduce heat loss in the glass-intersection, as well as the application of a frame with equal or greater thermal performance, in comparison with the vacuum insulated glass, are required. Under the condition of room air temperature 20℃ and relative humidity of 50%, the calculated outdoor air temperature was .21.2℃, when indoor surface condensation on the VIG window begins to occur. Analyzing based on the standard weather data for Seoul, it was expected that surface condensation on the VIG window would not occur.
키토산 함유 주사형 지지체가 성체 줄기세포 분화 중 골 형성 유전자 변화에 미치는 영향
정창호 ( Chang Ho Jeong ),위찬우 ( Chanwoo Wee ),고성균 ( Sung Kyun Ko ),정병훈 ( Byunghoon Jeong ),장철원 ( Cheolwon Jang ),임원봉 ( Wonbong Lim ) 한국키틴키토산학회 2024 한국키틴키토산학회지 Vol.29 No.1
Several injectable materials have been applied for bone substitute in bone defect however, nothing has achieved acceptance in clinic. This study was carried out to investigate whether chitosan-alginate gel/mesenchymal stem cell composites are potentially injectable substitute materials for bone remodeling. The chitosan-alginate gel/mesenchymal stem cell composites were implanted in the bone defect lesion of rat calvaria to investigate the mRNA expressions of implanted mesenchymal stem cells. The implantation of chitosan-alginate gel/mesenchymal stem cell promoted the expression of collagen type 1 in bone defect lesion and induced the growth of osteoblast cells, thereby promoting new bone formation. In addition, the new bone formation process was improved by increasing the expression of Col13a1, Tnn, Fignl1, and Chad, which are related to the growth and differentiation of osteoblasts, and decreasing the expression of MMP13, which is related to the differentiation of osteoclasts. The present study suggests that chitosan-alginate gel/mesenchymal stem cell composites could be a useful tool for treatment of bone defect as a bone substitute.
개망초(Erigeron annuus)의 부위별 화학성분
정창호(Chang Ho Jeong),남은경(Eun Kyeong Nam),심기환(Ki Hwan Shim) 한국식품영양과학회 2005 한국식품영양과학회지 Vol.34 No.6
개망초를 새로운 기능성 식품의 재료로 사용하기 위하여 각 부위별 화학성분을 조사하였다. 개망초의 꽃, 잎, 줄기 및 뿌리의 가용성 무질소물의 함량은 각각 53.15, 55.79, 36.71 및 42.61%로 각각 나타났다. 조섬유의 함량은 줄기와 뿌리에서 비슷하게 나타났으며, 꽃보다 잎에서 낮은 함량을 나타내었다. 개망초에 함유되어 있는 주요 무기성분으로는 Na(19.55~33.78 ㎎/100 g), K(49.95~89.80 ㎎/100 g) 및 Ca(25.39~116.40 ㎎/100 g)으로 나타났으며, 개망초의 각 부위별 Ca의 함량은 꽃, 줄기 및 뿌리보다 잎에서 가장 높은 함량을 나타내었다. 개망초에 함유되어 있는 주요 유리당으로는 sucrose(0.12~1.37%), glucose(0.68~1.08%) 및 fructose(0.56~1.66%)로 각각 나타났다. 개망초의 부위별 총 아미노산 함량은 꽃 2,509.74 ㎎/100 g, 잎 2,630.95 ㎎/100g, 줄기 889.54 ㎎/100 g 및 뿌리 1,201.41 ㎎/100 g으로 나타났으며, 꽃과 잎에 가장 많이 함유되어 있는 주요 아미노산으로는 glutamic acid, tyrosine 및 proline로 나타났다. 또한 줄기에서는 lysine, glutamic acid, aspartic acid로 나타났고, 뿌리에서는 lysine, glutamic acid 및 proline로 나타났다. 개망초에 함유되어 있는 주요 유기산으로는 succinic acid(4.78~19.72 ㎎/100 g), tartaric acid(3.90~6.91 ㎎/100 g) 및 citric acid(1.79~6.60 ㎎/100 g)로 나타났다. 개망초에는 총 9종의 지방산이 함유되어 있었고, 주요 지방산으로는 myristic acid(18.05~20.18%), oleic acid(18.50~32.91%) 및 linoleic acid(18.02~29.87%)로 나타났으며, 총 플라보노이드와 총 페놀성분은 꽃과 잎에서 다른 부위보다 높게 나타났다. The chemical components of different parts of Erigeron annuus were examined in order to use as a new functional food material. Nitrogen free extract contents of flowers, leaves, stems and roots were 53.15, 55.79, 36.71 and 42.61%, respectively. The contents of crude fiber in the stems and roots were similar, while those in leaves were lower than those in the flowers. Mineral components of Erigeron annuus were rich in Na (19.55~ 33.78 ㎎/100 g), K (49.95~89.80 ㎎/100 g) and Ca (25.39~116.40 ㎎/100 g). Among the portions of Erigeron annuus Ca contents was slightly higher level in the leaves than those of flowers, stems and roots. The major free sugars of Erigeron annuus were sucrose (0.12~1.37%), glucose (0.68~1.08%) and fructose (0.56~1.66%). The contents of total amino acid in Erigeron annuus were 2,509.74 ㎎/100 g in the flowers, 2,630.95 ㎎/100 g in the leaves, 889.54 ㎎/100 g in the stems, and 1,201.41 ㎎/100 g in leaves. Abundant amino acids in the flowers and leaves were glutamic acid, tyrosine and proline. And abundant amino acids of stems were lysine, glutamic acid and aspartic acid, and its root were lysine, glutamic acid and proline. Organic acid components of Erigeron annuus were succinic acid (4.78~19.72 ㎎/100 g), tartaric acid (3.90~6.91 ㎎/100 g) and citric acid (1.79~6.60 ㎎/100 g). Nine fatty acids in Erigeron annuus were identified and the major fatty acids were myristic acid (18.05~20.18%), oleic acid (18.50~32.91%) and linoleic acid (18.02~29.87%). Total flavonoid and phenol contents were higher in leaf and flower extracts than any other extracts.
초등 도덕교육과 철학교육: 독일 초등학교의 ‘실천철학’ 교과 확대를 둘러싼 논쟁
정창호 ( Chang Ho Jeong ) 한국인성감성교육학회 2018 인성·감성교육 Vol.1 No.1
이 글은 우리나라 초등 도덕과 수업에서 철학함의 요소를 강화할 필요성을 주장하고 옹호하는 데에 목적이 있다. 우리나라의 도덕과 교육과정은 학생들에게 단지 지식으로서의 도덕 규범을 넘어서 실제로 도덕적 삶을 살아가도록 교육할 것과 이를 위해서 학생들의 자립적인 사고능력과 판단능력 그리고 도덕적 감수성을 길러 줄 것을 요구하고 있다. 그러나 현장의 도덕교육은 이러한 교육과정 상의 요구를 제대로 실현하고 있지 못하다는 것이 일반적인 견해이다. 이러한 교육과정과 현장교육 간의 괴리는 시급히 해결되어야 할 과제라고 생각된다. 이에 이 글은 독일 초등학교에서의 도덕교육의 사례(노르트라인 베스트팔렌 주의 ‘실천철학’ 교과)를 검토함으로써 한국의 초등 도덕교육에도 철학함의 요소를 도입할 필요와 근거를 제시하려 했다. The moral education of South Korea needs to be accompanied by philosophy education. The national curriculum for moral and ethics make it clear that moral und ethics education in school should not be content with teaching students moral norms as any kind of knowledge. It should introduce them into the life of morality and therefore the school teacher must make his best for developing the capacity of independent thinking and judgment and moral sensibility of students. However, it is generally acknowledged that this claims of national curriculum are not fully realized in the moral and ethics classes of South Korea. I think that this unbalance between national curriculum and practice in schools must be solved as soon as possible. In this thesis, I have surveyed the case of ‘practical philosophy’ in Nordrhein-Westfalen, Germany, which is a new concept of moral and value education in Germany. The survey of this case, it is hoped, gives us some meaningful implications for Korean moral und personality education.
전통발효식품에서 분리한 유산균의 항균활성 및 프로바이오틱스 기능성 연구
강창호(Chang-Ho Kang),한설화(Seul Hwa Han),김용경(YongGyeong Kim),정율아(Yulah Jeong),백남수(Nam-Soo Paek) 한국생물공학회 2017 KSBB Journal Vol.32 No.3
The aim of this study was to investigate probiotic characteristics and fermentation profile of selected lactic acid bacteria (LAB) isolated from traditional fermented foods. Antibacterial activity against various pathogens, acid and bile salt tolerance, cell hydrophobicity, and antibiotic resistance were examined. 16S rRNA sequencing was carried out to identify eight presumptive LAB isolates. In general, all identified LAB (Enterococcus faecium MG89-2, Lactobacillus plantarum MG207, L. paracasei MG310, L. casei MG311, Streptococcus thermophilus MG510, L. bulgaricus MG515, L. helveticus MG585, and L. fermentum MG590) showed strong antimicrobial activity. Also, the selected strains were resistant to bile acid up to 3% and their autoaggregation rates were as high as 60%. All selected strains were sensitive to chloramphenicol, tetracycline, and ampicillin, whereas resistant to nalidixic acid and kanamycin.
외부 미세먼지 유입 저감을 위한 지하주차장 진입로시스템의 적용 타당성
정창호(Chang Ho Jeong) 대한설비공학회 2022 대한설비공학회 학술발표대회논문집 Vol.2022 No.6
Building have large openings where relatively large amounts of outdoor air can enter them. The driveway to the underground parking lot is a case in point. In this study, the impact of vehicle entry on fine dust concentration in underground parking lots was analyzed through field measurements. In addition, the feasibility of driveway system for underground parking lot to reduce fine dust when entering the vehicle was analyzed. As a result, The concentration of fine dust inside the underground parking lot was found to be more affected by vehicle entry in the case of PM2.5 than in PM10. Through the operation of the driveway system, it was found that the inflow of fine dust inside the underground parking lot was reduced.