Characteristics and mechanism of the enzymes dsgrading
biopolymers such as cellulose, lignin and hemicellulose in
microbilogy. Characterizing enzymes related with oxygen
metabolism in Streptomyces. Several new genera and species
were discovered in an effort to establish the phylogeny of
acctonomycetes. Physiological characteristics of
Helicobacter pylori

1967~ Professor, Seoul National University
1979~1980 Visiting Professor, Oregon State University. U.S.A.
1980~1982 President. The Korean Society of Microbiology
1988~ Executive Secretary of UNESCO Regional Network for Microbiology in Southeast Asia
1989~1994 Vice President. Korea Society of Water Quality
1989~1999 Director. Institute of Microbiology
1993~1999 Director. Research Center for Molecular Microbiology
1994~ President. Korean Society for Free Radical
1996~ Member, Water Quality Supervisory Committee of Seoul City
1997~1998 President. Korean Association of Biological Sciences

1995 Ha-Eun Prize in Biology