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탄소원 종류에 따른 환경친화성 생물소재인 세균 섬유소의 생산 및 특성
박성진,최승훈,박민주,이오미,손홍주,Park, SungJin,Choi, Seunghoon,Park, MinJoo,Lee, O-Mi,Son, Hong-Joo 한국환경과학회 2020 한국환경과학회지 Vol.29 No.8
Production of Bacterial Cellulose (BC) by Gluconacetobacter sp. A5 was studied in shaken culture using different cost-effective carbon sources and its structural and mechanical properties were evaluated. Glycerol showed the highest level (7.26 g/l) of BC production, which was about three times higher than the yield in glucose medium. BC production depended not only on the decrease in pH, but also on the ability of Gluconacetobacter sp. A5 to synthesize glucose from different carbon sources and then polymerize it into BC. All BC produced from different carbon sources exhibited a three-dimensional reticulated structure consisting of ultrafine cellulose fibriles. Carbon sources did not significantly change the microfibrile structure of the resulting BC. BC produced from glucose medium had the lowest water-holding capacity, while BC from molasses medium had the highest. XRD data revealed that all BC were cellulose type I, the same as typical native cellulose. The crystalline strength of BC produced in glucose medium was the highest, and that in molasses medium was the lowest. Our results suggest that glycerol could be a potential low-cost substrate for BC production, leading to the reduction in the production cost, and also to produce BC with different mechanical properties by selecting appropriate carbon source.
1994년~2014년 한국생활환경학회지의 연구동향 분석
박성진(Sungjin Park),하정윤(Jeong-Yoon Ha),이주영(Joo-Young Lee) 한국생활환경학회 2015 한국생활환경학회지 Vol.22 No.3
This study investigated original articles published in the Journal of the Korean Society of Living Environmental System (JKSLES), Journal of Physiological Anthropology (JPA), and Journal of Human-Environment System (JHES) from 1994 to 2014. Quantitative, qualitative, and historical analyses were conducted through the analysis of authors, affiliations, tables, figures, references, and key words. Based on the data, the main difference among journals was the average number of authors per article mapped over time. It was 2.7±1.5 authors in JKSLES having dominant articles with 2 authors, 2.9±1.6 authors in JHES having dominant articles with 3 authors, and 4.3±2.2 authors in JPA having dominant articles with 4 authors, respectively. ‘Thermal comfort’ was the main key word in JKSLES throughout the whole year. Periodically, ‘skin temperature’ (1994~1995), ‘thermal comfort’ (1996~2000), ‘thermal comfort’ (2001~2005), ‘physical activity’ (2006~2010), and ‘elderly’ (2011~2014) were the most frequently appeared key words in the JKSLES articles. We analysed the network among authors in terms of degree centrality, betweenness centrality, and closeness centrality. The findings showed that JKSLES made noticeable progress in the development of knowledge but interdisciplinary collaborative researches among the following four major areas, ‘construction, sports science, health science, and clothing science’ were not actively accomplished.