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Aspergillus niger 에 있어서 섬유질 분해효소계의 동질효소 양상에 미치는 기질의 영향
정재훈,이영하,노재랑 한국균학회 1990 韓國菌學會誌 Vol.18 No.4
The influence of cellulosic and hemicellulosic substrates on the production of cellulase and xylanase complexes in Aspergillus niger was investigated. The culture conditions with different substrates exhibited profound effects on the level of endoglucanase (CMCase), β-glucosidase, endoxylanase and β-xylosidase, and on their isozyme patterns. However, intracellular and extracellular isozyme patterns of cellulase and xylanase complexes were qualitatively identical and appeared to be simultaneous in the early growth phase. Prolonged incubation led to the increase in the concentrations of isozymes with a little changes in the relative proportions of those isozymes. These results suggest that the biosynthesis of cellulase and xylanase complexes in A. niger is coordinately regulated at the level of induction. Moreover, multiple forms of extracellular cellulase and xylanase complexes seem to be the outcome of specific gene expression and should not be considered solely as the consequence of post-secretional modification of synthesized enzymes.
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정재훈 전남도립대학교 2009 전남도립대학교 논문집 Vol.11 No.-
Efficacy of antioxidative activity and antimicrobial activity of water extracts of Korean bamboo trees were investigated. Electron-donation ability of extracts from bamboo trees were 65.4% in Maengjongjuk, 57.2% in somdae, 50.2% in Wangdae and 42.5% in Jolitdae. The RC50 value of extract of maengjongjuk was 20.5 g/ml. Among the antimicrobial activities against Staphylococcus aureus, Somdae showed the strongest activity among 4 major bamboo trees cultivated in Korea. The extract of Somdae almost inhibited the growth of Staphylococcus aureus at over 500 mg/L concentration. These results suggest that water extract of Korean bamboo trees can be used in bioactive and functional material.
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박물관의 물리적 환경과 관람피로와의 관계에 관한 연구 : 관람자의 만족도를 중심으로
정재훈,이경훈 대한건축학회 2004 대한건축학회논문집 Vol.20 No.2
The purpose of the study is to analyze the causal relationship of physical environment and museum fatigue concerning how museum fatigue would take place and, in turn, what effects it could give visitors in the aspect of their satisfaction. The data gathered from 760 visitors in 30 museums were analyzed by the regression analysis and path analysis. The results of analysis indicated that, 1) museum fatigue was more likely to be affected by mental fatigue rather than physical one. mental fatigue had the direct influence on visitors' satisfaction, while physical fatigue only had the indirect effect. 2) the factors which affect on visitors' mental fatigue were contents of exhibition, thermal comfort, and rest area, those on visitor's physical fatigue were exhibition area, staying time, contents of exhibition, and thermal comfort. 3) visual and locomotor accessibility affected directly to visitors' satisfaction. and 4) individual characteristics did not show any influence on visitors' satisfaction and fatigue.
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