Summary of Research Project Results under JSPS FY2001
"Research for the Future Program"



1.Research Institution The University of Tokyo
 
2.Research Area Integrated Fields
 
3.Research Field Causes and Effects of Environmental Loading its Reduction
 
4.Term of Project FY 1997 〜 FY 2001
 
5.Project Number 97I00502
 
6.Title of Project A New Technology to Evaluate the Risk of Environmental Toxic Agents to Human

7.Project Leader
Name Institution,Department Title of Position
Yasuo Igarashi The University of Tokyo, Graduate School of Agricultural and Life Sciences Professor

8.Core Members

Names Institution,Department Title of Position
Akira Yokota The University of Tokyo, Institute of Molecular and Cellular Biosciences Associate Professor
Takashi Yamakawa The University of Tokyo, Graduate School of Agricultural and Life Sciences Associate Professor
Masaharu Ishii The University of Tokyo, Graduate School of Agricultural and Life Sciences Associate Professor

9.Summary of Research Results

 The microbial community working in the process of degradation of urban waste (house garbage) was analyzed by modern molecular ecological techniques. A unique Bacillus-like microorganism which seems to be dominant in various processes of waste treatment was isolated and characterized. This organism has only highly limited abilities to degrade organic substrates and the reason for the dominance of this microorganism in waste-degrading processes is unclear. When oil-degrading Bacillus or E. coli are introduced in higher amount into the microbial community, those outsider microorganisms are easily expelled from the community. The waste-degrading community seems to form a special society. Development of new techniques is necessary to analyze the structure and stability of this microbial society.

10.Key Words

(1)Organic waste treatment、(2)Urban waste、(3)Kitchen garbage
(4)Microbiological treatment、(5)Microflora analysis、(6)Molecular microbial ecology
(7)Microbial society、(8)Complex system


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