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http://reply.papertrans.cn/2/181/18037/18037-32.png
Submitted on: 30 December 1999.
Revised on: 26 April 2000.
Accepted on: 09 June 2000.
___________________JOURNAL OF MICROBIOLOGY AND BIOTECHNOLOGY
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Submitted on: 20 July 2000.
Revised on: 24 September 2000.
Accepted on: 19 October 2000.
___________________JOURNAL OF MICROBIOLOGY AND BIOTECHNOLOGY