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In situ Gel Forming Stereocomplex Composed of Four-Arm PEG-PDLA and PEG-PLLA Block Copolymers
전여진,박경민,정윤기,이승진,박기동 한국고분자학회 2008 Macromolecular Research Vol.16 No.8
Injectable hydrogels are quite promising materials due to their potential to minimize invasive implantation and this provides versatile fitness irrespective of the damaged regions and facilitates the incorporation of bioactive agents or cells. In situ gel formation through stereocomplex formation is a promising candidate for injectable hydrogels. In this paper, a new series of enantiomeric, four-arm, PEG-PLA block copolymers and their stereocomplexed hydrogels were prepared by bulk ring-opening polymerization of D-lactide and L-lactide, respectively, with stannous octoate as a catalyst. The prepared polymers were characterized by 1H nuclear magnetic resonance (NMR) spectroscopy, Fourier-transform infrared (FT IR) spectroscopy, gel permeation chromatography (GPC) and thermal gravitational analysis (TGA), confirming the tailored structure and chain lengths. The swelling and degradation behavior of the hydrogels formed from a selected copolymer series were observed in different concentrations. The degradation rate decreased with increasing polymer content in the solution. The rheological behavior indicated that the prepared hydrogel underwent in situ gelation and had favorable mechanical strength. In addition, its feasibility as an injectable scaffold was evaluated using a media dependence test for cell culture. A Tris solution was more favorable for in situ gel formation than PBS and DMEM solutions were. These results demonstrated the in situ formation of hydrogel through the construction of a stereocomplex with enantiomeric, 4-arm, PEG-PLA copolymers. Overall, enantiomeric, 4-arm, PEG-PLA copolymers are a new species of stereocomplexed hydrogels that are suitable for further research into injectable hydrogels.
아파트 단지 내 미술장식품 설치에 관한 거주자 의식 분석 -부산광역시 아파트를 중심으로-
전여진,류종우 대한건축학회지회연합회 2007 대한건축학회연합논문집 Vol.9 No.4
The outdoor space in apartment complex will be used as not only passing through for pedestrians, communication and recreation place for residents, and play space for children but a buffer zone to protect urban pollution. Due to that art installation in outdoor space has special relationship with surrounding environment, it is imperative to concern the harmony between the art object and surrounding environment in terms of the optimized space and accessibility to the installation. People in this country especially consider the outdoor art installation from the beginning of 1980's and a compulsory policy driven by government has been set by the chance of 1986's Asian game and 1988's Olympic game. Since the time many public art objects have been installed throughout the cities. It, however, has been condemned that the objects are too much mannerism because uniformed and compulsory policy which emphasizes too much on shape itself can not support the harmony in terms of place, material, size, color and so on. Therefore, the study focuses on the role of outdoor public art installation to form a urban image. To do that, the study is investigating and analyzing the existing condition. The main purpose of the study will bel suggestion an design guideline which can be satisfied by a resident and improve residential quality by harmonizing the urban environment.
도시가로경관개선을 위한 건축물 미술장식품의 평가 및 개선방안 연구
전여진,유재우 대한건축학회지회연합회 2012 대한건축학회연합논문집 Vol.14 No.1
현재 도시가로경관 개선을 위한 건축물 미술장식품에 대한 정량적인 평가기준 설정에 대한 연구를 통해 도심 속 건축물 미술장식품의 재정비 및 공공미술과 접목시킬 수 있는 방안이 시급히 요청된다. 이에 본 연구에서는 건축물 미술장식품 평가요인을 통하여 심의 및 선정에 기초적 자료를 제시하고 도시 공간 속 무분별하게 설치되어 있는 미술장식품에 관하여 평가 및 실태조사를 수행한 후 문제점을 도출하고 해결방안을 모색하여 실제 미술장식품 선정 및 설치를 위한 적용 가능한 근거를 제공하고자 한다.
부산시 건축물 미술장식품 실태 및 이용자 의식조사 연구
전여진(Jun Yeo-Jin),류종우(Lyou Joung-Woo) 대한건축학회 2007 대한건축학회논문집 Vol.23 No.12
The percent for art scheme is the government regulation that decorative art has to be installed at least 1 percentage of the whole construction cost in terms of improving cultural urban environment and promoting urban arts when the new construction or renovation of the building which is over the scale by the law. The policy has been introduced since 1980's and it was settled by 1986's Asian Game and 1988's Olympic Game to support improving cultural urban space. This research investigates some problems and effective solutions in terms of cultural urban environment to improve the present condition depending on the information of Market-Research and the present installation. After collecting the analyzed results of the present condition and users' awareness, the guideline can be suggested with following ideas. The installation of public art in Busan should be considered the harmony with surrounding environment above all, but the function as public art, and effective explanation about the installed arts to public are also important factors to consider. In addition, in terms of public art in Busan, the main observer or user in the citizen in Busan. Therefore, it will be a good idea if the Busan's own or unique culture is involved into the installed art.