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박은주,탁혜진,박은하,백정미,이상휘,Park, Eun-Ju,Tak, Hye-Jin,Park, Eun-Ha,Baik, Jeong-Mi,Zhengguo, Piao,Lee, Sang-Hwy Korean Association of Maxillofacial Plastic and Re 2009 Maxillofacial Plastic Reconstructive Surgery Vol.31 No.2
In vertebrates, the face is mainly formed with neural crest derived neural crest cells by the inherent programs and the interactive environmental factors. Extracellular signaling-regulated kinase (Erk) is one of such programs to regulate the various cellular functions. And retinoic acid (RA) also plays an important role as a regulator in differentiation process at various stages of vertebrate embryogenesis. We wanted to know that the segregation as well as the patterning of maxillary and mandibular structure is greatly influenced by the maxillomandibular cleft (MMC) and the failure of this development may result in the maxillomandibular fusion (syngnathia) or other patterning related disorder. It has been well documented that the epithelium at this cleft region has significant expression of Fibroblast growth factor (Fgf) 8, and it is essential for the patterning of the first arch derived structures. By the morphological, skeletal, cell proliferation and apoptotic, and hybridization analysis, we checked the effects of Erk inhibition and/or RA activation onto MMC and could observe that Erk and RA signaling is individually and synergically involved in the facial patterning in terms of FGF signaling pathway via Barx-l. So RA and Erk signaling work together for the MMC patterning and the segregation of maxilla-mandible by controlling the Fgf-related signaling pathways. And the abnormality in MMC brought by aberrant Fgf signaling may result in the disturbances of maxillary-mandibular segregation.
플라스틱 광섬유용 클래드 재료 개발 - PMMA/THV 블렌드의 상용성과 계면 접착력 -
박은주,박인철,이무성,박민,Park, Eun-Ju,Park, In-Cheol,Lee, Moo-Sung,Park, Min 한국섬유공학회 2008 한국섬유공학회지 Vol.45 No.6
We investigated the miscibility of poly(methyl methacrylate) (PMMA) and random copolymers of tetrafluoroethylene-hexafluoropropylene-vinylidene fluoride (THV) blends and their interfacial adhesion as part of the development of cladding materials for PMMA based plastic optical fiber. Three different types of THV with different copolymer composition were used as candidates for them. PMMA/THV blends being melt-mixed at $240^{\circ}C$ showed typical immiscible morphology and the glass transition temperatures of the component polymers did not change after mixing. However, tie chains connecting matrix and dispersed phase were identified when THV with high content of vinylidene fluoride, i.e., THV220 was used. In spite of the intrinsic immiscibility of PMMA/THV blends the interfacial adhesion obtained from peel test was above $10^4N/m^2$ at the adhesion temperature of $240^{\circ}C$ and increased with increasing the temperature for THV220. From the melt viscosity data of the polymers it was recommended that the extrusion temperature of THV should be higher than that of PMMA in order to obtain smooth interface between core and cladding layer.
박은주,Park, Eun-Ju 에너지절약전문기업협회 2007 esco Vol.47 No.-
6개동 498세대가 거주하고 있는 서울 하계동 한신동성아파트는 지난 2006년 12월 327kW급 열병합발전기를 도입했다. 기존에 스팀보일러로 중앙난방을 하던 방식에서 발전기로 대체한 이 아파트는 가동한지 7개월만에 2억 원 이상 비용절감을 하고 있다. 한신동성아파트를 찾아가 보았다.
박은주,Park, Eun-Ju 에너지절약전문기업협회 2007 esco Vol.48 No.-
2002년도에 ESCO사업을 시작한 LIG엔설팅(전 티알씨코리아, 대표 최승기)은 발주자지만 에너지관리공단 진단용역을 통한 전문성 강화와 유능한 인재로 단기간 ESCO시장의 선두권에 진입하고 있다. 특히 이번에는 LIG엔설팅으로 사명을 바꾸고 본격적인 시장 공략에 나서고 있다.
박은주,Park, Eun-Ju 에너지절약전문기업협회 2007 esco Vol.48 No.-
김해시가 장유면 '장유쓰레기소각장'의 열병합발전시설을 ESCO사업으로 진행, 연간 6억원의 예산절감을 할 것으로 보여 주목된다. 특히 이 시설은 전력과 온수를 동시에 생산하게 되어 고유가시대에 에너지 이용 효율을 높이고, 에너지비용을 절감할 수 있는 이점 때문에 앞으로 각 지방자치단체에 그 파급효과가 클 것으로 기대되고 있다.