1 Division of Civil and Environmental Systems Engineering, Korea Maritime University, Busan 606-791, Korea; 2 Department of Agricultural Chemistry, Kyungpook National University, Daegu 702-701, Korea; 3 Department of Bioresource Science, Andong National University, Andong 760-749, Korea; 4 Busan Regional Office, National Veterinary Research and Quarantine Service, Ministry of Agriculture and Forestry, Busan 620-030, Korea; 5 Department of Biological Engineering and Center for Advanced Bioseparation, Inha University, Incheon 402-751, Korea (Received March 10, 2003 / Accepted May 6, 2003)1 Division of Civil and Environmental Systems Engineering, Korea Maritime University, Busan 606-791, Korea; 2 Department of Agricultural Chemistry, Kyungpook National University, Daegu 702-701, Korea; 3 Department of Bioresource Science, Andong National University, Andong 760-749, Korea; 4 Busan Regional Office, National Veterinary Research and Quarantine Service, Ministry of Agriculture and Forestry, Busan 620-030, Korea; 5 Department of Biological Engineering and Center for Advanced Bioseparation, Inha University, Incheon 402-751, Korea (Received March 10, 2003 / Accepted May 6, 2003)

Corresponding author:  Sung-Cheol Koh , Tel: 82-51-410-4418,